Assembly for a bed

Abstract

Assembly (1) for a couch (3), in particular for a medical couch (4), for adjustable attachment of an extension (38) to the couch (3) - with a manually adjustable arrangement (5) for connecting an extension (38) to the lounger (3), - wherein the arrangement (5) is pivotable about a pivot axis (7) running parallel to the shaft (6) via at least two shafts (6), - wherein the arrangement (5) for the respective shaft (6) has a locking mechanism (8) which is adjustable between a locking position in which the locking mechanism (8) prevents the arrangement (5) from pivoting about the pivot axis (7) belonging to the shaft (6) and an adjustment position in which the locking mechanism (8) releases the arrangement (5) from pivoting about the pivot axis (7), characterized in that - that the assembly (1) for the respective shaft (6) has a spring assembly (9) comprising at least one spring (10), - that the spring device (9) in the adjustment position of the locking mechanism (8) belonging to the shaft (6) acts resiliently on the arrangement (5) such that the arrangement (5) in the adjustment position of the associated locking mechanism (8) is fixed against pivoting movements about the pivot axis (7) belonging to the shaft without additional force and when additional force is applied about the pivot axis (7) - that the arrangement (5) has at least one support arm (11) for supporting the attachment (38), which is pivotable about the pivot axis (7) belonging to the shaft (6) via at least one of the at least one shaft (6), - that the arrangement (5) has a first support arm (11, 11a) and a second support arm (11, 11b), - that the first support arm (11, 11a) is connected to a shaft (6) in a rotationally fixed manner, - that the second support arm (11, 11b) is pivotable about a second pivot axis (7, 7b) via the shaft (6), so that the support arms (11) are pivotable relative to each other via the shaft (6), - that the arrangement (5) has a bracket (12) for attaching the attachment (38) to the assembly (1), - that the holder (12) is pivotable about the pivot axis (7) belonging to the shaft (6) via one of the at least one shaft (6).

Description

[0001] The present invention relates to an assembly for a medical couch for adjustable attachment of an accessory, in particular a headrest, to the couch. The invention further relates to a couch, in particular a medical couch, with such an assembly and such an accessory.

[0002] Treatment tables, especially medical treatment tables, typically have at least one attachment for adapting the table. Such an attachment might be, for example, a headrest for a user, particularly a patient, on which the user rests their head. Another such attachment is a foot and / or leg rest for a user, particularly a patient, on which the user rests their feet and / or legs. These attachments are usually connected to the table via an associated assembly. For this purpose, the assembly typically includes, for example, at least one support arm for carrying the attachment and a bracket for securing it.

[0003] Such arrangements are typically adjustable to change the relative position of the attachment to the bed. This makes it possible, in particular, to adjust the desired relative position of the attachment to the bed for users of different heights and / or in different reclining positions. The arrangement is usually adjusted by means of at least one shaft, which allows the arrangement to pivot about a corresponding axis. The assembly generally also features a locking mechanism to allow adjustment of the arrangement only when desired. Such locking mechanisms are usually adjustable between a locked position, in which adjustment of the arrangement about at least one of the pivot axes is prevented, and an adjustable position, in which the corresponding adjustment, and thus pivoting about the corresponding axis, is permitted.

[0004] From DE 297 18 485 U1, a treatment chair with a headrest and a backrest is known. The headrest is connected to a holder which is longitudinally slidable in a guide on the backrest. A counterweight acts on the headrest parallel to the guide.

[0005] DE 31 16 208 A1 describes a treatment chair with a headrest and a backrest. The headrest is connected to an arc-shaped shaft, which is guided in a similarly arc-shaped channel on the backrest, so that the headrest can swivel relative to the backrest.

[0006] German patent DE 30 48 688 A1 discloses a treatment chair with a headrest and a backrest. The headrest is pivotable relative to the backrest via a shaft, with a ratchet wheel releasing and locking the pivoting movement.

[0007] A disadvantage of this design is that when the locking mechanisms are moved into the adjustment position, the assembly pivots around its axis without being held by the user. This means that the assembly must be held and adjusted manually to achieve the desired position. This, combined with the need to move the locking mechanism into the adjustment position, reduces ease of use. In particular, two hands are required to adjust the assembly.

[0008] The present invention therefore addresses the problem of providing improved or at least other embodiments for an assembly of the type mentioned at the outset, as well as for a lounger with such an assembly, which are characterized in particular by increased comfort and / or simplified adjustability.

[0009] This problem is solved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0010] The present invention is based on the general idea of ​​providing, in an assembly for a couch, in particular a medical couch, with a manually adjustable arrangement for connecting and holding an attachment to the couch, which is pivotable via at least one shaft about a pivot axis running parallel to the shaft, a spring device for at least one of the at least one shaft, which acts on the arrangement in such a way that the arrangement is fixed even when pivoting about the pivot axis is otherwise possible without additional force acting on the arrangement and only pivots about the associated pivot axis when additional force is applied.The spring mechanism ensures that even when the locking mechanism is released, the assembly does not pivot spontaneously, but only when an additional force is applied, particularly one manually by a user. In other words, the spring mechanism prevents the assembly and its attachments from pivoting around the pivot axis solely due to gravity and / or its own weight. The spring mechanism effectively generates static friction that at least counteracts the pivoting caused by gravity and / or its own weight.

[0011] In accordance with the invention, the assembly comprises a manually adjustable device for connecting the attachment to the bed. The device is pivotable about a pivot axis parallel to the shaft via at least one shaft. Furthermore, the device has a locking mechanism for at least one of the at least one shaft, preferably for the respective shaft, which prevents the device from pivoting about the corresponding shaft. The locking mechanism is therefore adjustable, particularly manually, between two positions, which are hereinafter also referred to as the locking position and the adjustment position. In the locking position, the locking mechanism prevents the device from pivoting about the pivot axis associated with the shaft, whereas in the adjustment position, the locking mechanism releases the device from pivoting about the pivot axis.According to the invention, the assembly for at least one of the at least one shaft has an associated spring device, which includes at least one spring. In the adjusted position of the locking mechanism associated with the shaft, the spring device acts on the arrangement such that the arrangement is fixed against pivoting movements about the pivot axis in the adjusted position of the associated locking mechanism without additional force being applied, and only pivots about the pivot axis when additional force is applied.

[0012] An attachment in this sense is one that is adjustable and mounted to the treatment table using a modular assembly for adapting the table. Such an attachment could be, for example, a headrest, a foot and / or leg rest, an armrest, a tool and / or instrument holder, and the like. Typically, the attachment protrudes from the table's surface by means of the modular assembly.

[0013] Preferably, the assembly, in particular the at least one spring mechanism, is designed such that only pivoting about the associated pivot axis caused by gravity and / or its own weight is compensated. This allows the user to adjust the assembly, and thus also the associated attachment, more easily and with reduced effort.

[0014] In principle, it would also be conceivable that the action of at least one spring mechanism could outweigh the compensation for the pivoting around the associated pivot axis caused by gravity and / or the user's own weight, such that, for example, even when weight is bearing down on the attachment during use, pivoting would only occur through an additional force applied by the user. This would specifically prevent the assembly from pivoting immediately when the locking mechanism is moved into the adjustment position and a user is lying on the lounger. In the example of a headrest attachment, this would therefore prevent the pivoting from occurring solely through an additional force applied by the user when the head is resting on the headrest.

[0015] Preferred embodiments include an arrangement in which at least one of the at least one shaft has a corresponding receptacle in which the shaft is received. In particular, the shaft is guided through the corresponding receptacle. This means that the arrangement is supported around the shaft, or vice versa. The receptacle is bounded along the corresponding pivot axis by at least one end face, preferably by two opposite end faces along the corresponding pivot axis. The spring assembly acts against at least one of the at least one end face. In this way, the action of the spring assembly on the arrangement can be implemented in a compact and simple manner. In particular, this makes it possible to design the spring assembly and the at least one spring in a simpler and more compact way.Furthermore, this increases the spring action of the spring device on the arrangement, so that the spring device requires a reduced spring force in particular to achieve the same effect.

[0016] Advantageously, at least one end face runs perpendicular to the corresponding pivot axis. It is also conceivable that at least one end face runs inclined to the corresponding pivot axis.

[0017] The assembly advantageously features at least one friction element between at least one of the at least one spring assembly and the arrangement, which leads to increased static friction of the arrangement. This means that the spring assembly biases the at least one friction element against the arrangement. Thus, the force acting on the arrangement is increased simply and effectively. Furthermore, this reduces damage and wear to the spring assembly, especially to the at least one spring.

[0018] The friction element can, in principle, be of any design, provided it increases the friction between the assembly or the friction element. A rubber component or similar material is advantageous. This can be a plate or a ring. In particular, the friction element can be a sleeve-like rubber ring through which, for example, the associated shaft is guided.

[0019] In principle, the spring mechanism can act on the arrangement in any direction.

[0020] Advantageous embodiments are those in which at least one of the at least one spring assembly, preferably the respective spring assembly, acts on the arrangement parallel to the pivot axis of the associated shaft. This allows for a larger available effective area of ​​the arrangement to be utilized. At the same time, the assembly is simplified and compact in design and easier to assemble.

[0021] The spring action of the spring device on the arrangement can, in principle, be designed in any way imaginable.

[0022] Preferably, at least one of the at least one spring assembly, advantageously the respective spring assembly, has a clamping element, for example a screw, which is rotationally fixed to the associated shaft and which preloads the at least one spring against the arrangement. In particular, it is conceivable that the clamping element, especially the screw, runs parallel to the shaft and has a projection, especially a screw head, which preloads the at least one spring in the direction of the arrangement. This results in an effective and simple action of the spring assembly on the arrangement.

[0023] It is advantageous if the assembly has a corresponding stop for at least one of the at least one spring assembly, wherein the spring assembly preloads the assembly against the stop. This simplifies the preloading of the assembly and thus simplifies the action on the assembly. At the same time, the stop can also be used to act on the assembly in order to fix it in the adjusted position of the corresponding locking mechanism.

[0024] Advantageously, a friction element of the type described above is arranged between the stop and the assembly. This increases the static friction acting on the assembly simply and effectively. In particular, it is possible for at least one of the at least one spring and the associated stop to be arranged along the pivot axis on opposite sides of the assembly and to act on the assembly from both sides.

[0025] The at least one spring assembly can, in principle, consist of any spring that acts resiliently on the arrangement. For example, it is conceivable to use at least one coil spring.

[0026] Preferred embodiments include those in which the at least one spring assembly, advantageously the respective spring assembly, comprises at least one disc spring. This results in a compact assembly design while simultaneously increasing the surface area acting on the arrangement. In other words, the use of the disc spring allows for a greater effect on the arrangement while maintaining a compact design. It is conceivable to use at least two disc springs connected in series along the pivot axis. This means that at least one of the at least one spring assembly can have at least two disc springs connected in series along the associated pivot axis.

[0027] The arrangement can, in principle, be designed in any way, provided that it allows for adjustable attachment of the associated extension to the associated lounger.

[0028] The arrangement has at least one support arm that carries the attachment. The support arm extends expediently transversely or inclined to the at least one shaft, advantageously to the respective shaft and thus to the corresponding pivot axis. This allows for greater variability when adjusting the arrangement and thus the attachment relative to the bed.

[0029] It is preferred that the locking mechanism and / or the spring device act accordingly on at least one of the at least one support arm, advantageously on the respective support arm.

[0030] In advantageous embodiments, at least one of the at least one support arm has a receptacle for receiving one of the at least one shafts. This means that at least one of the at least one receptacles is formed in an associated support arm. The support arm also expediently has at least one end face belonging to the receptacle.

[0031] It is conceivable to design at least one of the at least one support arm as a slotted clamping arm with at least two legs separated by a slot. The legs accommodate at least one of the at least one associated shaft. In particular, the legs can form at least one of the at least one receptacle. The slots allow the legs to move relative to each other. It is preferred that the locking mechanism clamps the legs against the at least one associated shaft in the locked position, thus preventing the support arm from pivoting about the pivot axis associated with the shaft. Advantageously, this clamping is released in the adjusting position of the locking mechanism. This allows for a simple design of the arrangement with intuitive operation and therefore increased user comfort.

[0032] Preferably, the slotted clamping arm accommodates two shafts spaced apart from each other along the clamping arm, with the locking mechanism preventing pivoting about the respective associated locking axis in the locked position. This means that a common locking mechanism is provided for both shafts and their associated pivot axes. This results in a simplified design and more intuitive operation of the assembly.

[0033] In principle, the assembly can only have a single such support arm.

[0034] The arrangement comprises two such support arms, namely a first support arm and a second support arm. Advantageously, the first support arm is rotationally fixed to a shaft, via which the second support arm can pivot about the pivot axis associated with the shaft. Thus, the support arms can pivot relative to each other about the pivot axis. This results in an increase in the degrees of freedom for adjusting the arrangement and therefore an increase in the adjustment possibilities of the arrangement. In particular, the arrangement can be connected to the bed via the second support arm and to the attachment via the first support arm. Advantageously, at least one spring device of the type according to the invention is provided for the shaft.

[0035] The arrangement includes a bracket to which the attachment is or will be fastened. That is, the bracket serves to fasten the attachment to the assembly. The bracket is pivotable about the associated pivot axis via one of the at least one shafts. It is preferred if at least one locking mechanism and at least one spring device of the type according to the invention are provided for the at least one shaft belonging to the bracket.

[0036] A simplified implementation of at least one of the at least one locking mechanism can be achieved by having the locking mechanism interact with an associated spring assembly to realize the locking position. In particular, in the locked position, the locking mechanism acts on the associated spring assembly in such a way that the spring assembly exerts a stronger effect on the arrangement in the locked position than in the adjustable position.

[0037] Simplified manual operation of the assembly can be achieved by providing at least one of the locking mechanisms with a manually operated lever for adjusting the locking mechanism between positions. Advantageously, this lever is designed as a clamping lever.

[0038] The arrangement has two or more shafts and can therefore be pivoted about two or more pivot axes.

[0039] It is preferred if at least two of the at least two shafts or pivot axes, and advantageously all pivot axes, run parallel to each other. It is expedient and preferred if the respective pivot axis runs transversely to a direction of distance between the attachment and the bed.

[0040] It is understood that at least one of the at least one shaft may be equipped with two spring assemblies. Advantageously, the spring assemblies are arranged along the associated pivot axis on opposite sides of the assembly.

[0041] It is understood that, in addition to the assembly, a couch with such an assembly and an attachment adjustable to the couch by means of the assembly is also part of the subject matter of the invention.

[0042] The attachments include, for example, a headrest, a foot and / or leg rest, an armrest, a tool and / or instrument carrier, and the like.

[0043] Of course, the lounger can also have two or more such assemblies, with at least two of the assemblies each having an adjustable attachment on the lounger.

[0044] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0045] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0046] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0047] They show, each schematically Fig. 1 an isometric view of a lounger with an assembly and an extension, Fig. 2 an isometric view of the assembly, Fig. 3 another isometric, exploded view of the assembly, Fig. 4 den in Fig. 3. Area labelled IV in enlarged view, Fig. 5 den in Fig. 3. Area marked V in enlarged view, Fig. 6 an isometric view of the couch in another embodiment.

[0048] A component group 1, such as those found in the Fig. Figures 1 to 6 are shown for holding and adjustable connection, only in Fig. The assembly 1 shows an attachment 38 on a couch 3 (not otherwise shown), in particular a medical couch 4. In the examples shown, the attachment 38 is a headrest 2. The assembly 1 has a device 5 for holding and connecting the attachment 38 to the couch 3. The device 5 is adjustable. The adjustability of the device 5 is achieved via at least one shaft 6. The device 5 is pivotable about a pivot axis 7 running parallel to the shaft 6. The device 5 has a locking mechanism 8 for at least one of the at least one shaft 6, which serves to prevent unintentional pivoting of the device 5 about the pivot axis 7 belonging to the at least one shaft 6.The locking mechanism 8 is therefore adjustable between a locking position, in which the locking mechanism 8 prevents the arrangement 5 from pivoting about the pivot axis 7 associated with the shaft 6, and an adjustment position, in which the locking mechanism 8 releases the arrangement 5 from pivoting about the pivot axis 7. The locking positions for the respective locking mechanism 8 are shown in the figures. The assembly 1 has an associated spring assembly 9 for at least one of the at least one shaft 6. The spring assembly 9 is particularly designed to... Fig. Figures 3 to 5 are shown. Each spring assembly 9 has at least one spring 10. In the adjusted position of the locking mechanism 8 associated with the shaft 6, the spring assembly 9 acts on the arrangement 5 in such a way that the arrangement 5 remains in the pivot position in the adjusted position of the associated locking mechanism 8, i.e., it is fixed against pivoting movements about the pivot axis 7 without any additional force being applied. Furthermore, the action is such that pivoting about the pivot axis 7 only occurs when an additional force is applied, in particular by a user. The spring assembly 9 thus prevents the arrangement 5 from pivoting solely due to gravity and its own weight. The action of the spring assembly 9 results in static friction that at least compensates for the pivoting caused by gravity and its own weight.

[0049] In the illustrated embodiments, the arrangement 5 has two support arms 11 for carrying the structure and a bracket 12 for attaching the attachment 38. The bracket 12 is attached to one end of a first support arm 11a. The first support arm 11a is further connected at one end, away from the bracket 12, to a second support arm 11b. The arrangement 5 is connected to the associated couch 3 via the second support arm 11b. The second support arm 11b is connected at opposite ends to the first support arm 11a and the couch 3.

[0050] In the illustrated embodiments, the assembly 1 has a total of three shafts 6. The shafts 6 run transversely to a distance direction (not shown) between the support 12 or the attachment 38 and the bed 3, thus conveniently horizontally in use. The same applies to the associated pivot axes 7. The support 12 can be pivoted about a first pivot axis 7a relative to the first support arm 11a via a first shaft 6a. A second shaft 6b is rotationally fixed to the first support arm 11a. This is done in the illustrated embodiments, as in particular Fig. 3 can be removed via a pin 13. The second support arm 11b is pivotable about a second pivot axis 7b via the second shaft 6b. Thus, the support arms 11 as a whole are pivotable relative to each other about the second pivot axis 7b. The second support arm 11b is furthermore pivotable about a third pivot axis 7c relative to the couch 3 via a third shaft 6c. In the illustrated embodiments, this is achieved by a rotationally fixed connection of the third shaft 6c to the couch 3. In the embodiment of the Fig. For this purpose, the third wave 6c is fixed to a connecting rod 14 connected to the couch 3, as shown in sections 1 to 5.

[0051] The in Fig. The embodiment shown in section 6 differs from the one described in the Fig. The embodiment shown in Figures 1 to 5 differs in that the assembly 1 is connected to the bed 3 by means of a clamping piece 15 instead of the connecting rod 14. Here, the third shaft 6c is fixedly mounted in the clamping piece 15. Furthermore, the embodiment shown in Figures 1 to 5 differs in that the assembly 1 is connected to the bed 3 by means of a clamping piece 15 instead of the connecting rod 14. The third shaft 6c is fixedly mounted in the clamping piece 15. Fig. 6 shown embodiment of the one in the Fig. 1 to 5 shown embodiment by a different holder 12.

[0052] In the illustrated embodiments, the respective shaft 6 is guided by at least one of the support arms 11, which for this purpose has a receptacle 16 belonging to the shaft 6. The first support arm 11a has a first receptacle 16a for the first shaft 6a and a second receptacle 16b for the second shaft 6b. The second support arm 11b has a third receptacle 16c for the second shaft 6b and a fourth receptacle 16d for the third shaft 6c. In the illustrated embodiments, the receptacles 16 of the respective support arm 11 are formed at opposite ends of the respective support arm 11. The respective receptacle 16 is bounded along the pivot axis 7 of the associated shaft 6 by two opposite end faces 17, which extend transversely to the associated pivot axis 7.

[0053] In the illustrated embodiments, the respective spring assembly 9 comprises at least two springs 10. In these embodiments, each spring 10 is designed as a disc spring 18. Each spring 10 is preloaded against a corresponding end face 17, so that static friction acts on the corresponding end face 17, preventing pivoting about the corresponding pivot axis 7 in the adjustment position of the associated locking mechanism 8 without the application of additional force. The respective spring assembly 9 thus acts on the arrangement 5 parallel to the pivot axis 7 of the associated shaft 6. In the illustrated embodiments, at least one friction element 19 is arranged to increase the static friction between the respective end face 17 and one of the at least one spring 10. This friction element 19 is preloaded by the at least one spring 10 against the corresponding end face 17.The friction element 19 increases friction and is preferably a rubber element 20, which in the illustrated embodiments is designed as a ring 21, hereinafter also referred to as friction ring 21.

[0054] In the illustrated embodiments, the respective spring assembly 9 has a clamping element 22, which is designed as a screw 23 and which is rotationally fixed to the associated shaft 7. The clamping element 22 clamps the at least one spring 10 of the associated spring assembly 9 against at least one of the associated end faces 17 such that the friction elements 19 are pre-tensioned against the end faces 17. The clamping element 22, designed as a screw 23, acts via a screw head 24 on a sleeve-like pressure plate 25, which surrounds the associated at least one disc spring 18 and rests on one of the associated friction elements 19. As shown in the illustrations... Fig. Since springs 3 to 5 can be removed, a spacer sleeve 26 can be arranged between the adjacent springs 10. The sleeve 26 creates at least a distance between the springs 10 and thus prevents the springs 10 from being compressed to their limit.

[0055] In the illustrated embodiments, a corresponding locking mechanism 8a is provided for the first pivot axis 7a. The first shaft 6a is rotationally fixed to the first locking mechanism 8a and arranged in the first receptacle 16a. In the illustrated embodiments, the locking mechanism 8a is formed integrally with the first shaft 6a. As shown in particular Fig. 2 and Fig. As can be seen from Figure 5, in the illustrated embodiments, the holder 12 has two cheeks 28 projecting towards the first support arm 11a, which engage the end faces 17 of the first receptacle 16a. A further friction element 19 is provided between each cheek 28 and the corresponding end face 17. A spring assembly 9 of the type described is provided on the side of the first support arm 11a facing away from the first locking mechanism 8a. In the illustrated embodiments, a spring assembly 9 of the same type is also provided between the first locking mechanism 8a and the end face 17 facing it. To adjust the first locking mechanism 8a between the locked position and the adjusted position, the first shaft 6a, which is non-rotatably connected to the first locking mechanism 8a, is rotated via an associated clamping lever 27. For this purpose, the first shaft 6a is provided with a thread (not shown).In the illustrated embodiments, the first shaft 6a is therefore also part of the first locking mechanism 8a.

[0056] In the illustrated embodiments, a spring assembly 9 is provided for each of the second pivot axis 7b and the third pivot axis 7c. A friction element 19, resting on the opposite end face 17, is also provided on the side of the spring assembly 9 facing away from the springs 10 along the associated pivot axis 7. The assembly 1 has a corresponding stop 29 for each spring assembly 9 associated with the second shaft 6b and the third shaft 6c, against which the spring assembly 9 biases the opposite end face 17. In the illustrated embodiments, the stop 29 associated with the spring assembly 9 of the second shaft 6b is designed as a collar 30 projecting from the second shaft 6b. The stop 29 associated with the third shaft 6c is, in the illustrated embodiments, Fig. 1 to 5 are formed by an end face 31 of a sleeve-shaped adapter 33, the adapter 33 serving to connect the assembly 1 to the connecting rod 14. The third shaft 6c is fixed to the adapter 33 in a rotationally fixed manner. In the illustrated embodiment, the adapter 33 and the third shaft 6c are integral parts, the third shaft 6c being, in particular, part of the adapter 33. In the embodiment of the Fig. 6 A corresponding end face 31 of the clamping piece 15 serves as a stop 29.

[0057] In the illustrated embodiments, the second support arm 11b is designed as a slotted clamping arm 34. The clamping arm 34 has at least two legs 36 separated from each other by a slot 35. In the illustrated embodiments, the clamping arm 34 has a single leg 36, hereinafter also referred to as the first leg 36a, extending transversely to the second pivot axis 7b and the third pivot axis 7c. On the opposite side, the clamping arm 34 has two legs 36 separated from each other along the second pivot axis 7b and the third pivot axis 7c, which are hereinafter also referred to as the second leg 36b and the third leg 36c. Here, the first leg 36a forms the third receptacle 16c with the second leg 36b, and the fourth receptacle 16d with the third leg 36c.Furthermore, in the illustrated embodiments, the same locking mechanism 8 is provided for the second pivot axis 7b and the third pivot axis 7c, which is hereinafter also referred to as the second locking mechanism 8b. The second locking mechanism 8b comprises a thread 37 guided by the clamping arm 34 and interacting with the first leg 36a, which is rotationally fixed to a clamping lever 27. Thus, by loosening the thread 37, the second locking mechanism 8b is moved into the adjusting position for the second shaft 6b and the third shaft 6c, and therefore for the second pivot axis 7b and the third pivot axis 7c. When the thread 37 is screwed in, the legs 36a clamp against the second shaft 6b and the third shaft 6c, so that the locking position is established for the second shaft 6b and the third shaft 6c.

Claims

[1] Assembly (1) for a couch (3), in particular for a medical couch (4), for adjustable attachment of an extension (38) to the couch (3) - with a manually adjustable arrangement (5) for connecting an extension (38) to the lounger (3), - wherein the arrangement (5) is pivotable about a pivot axis (7) running parallel to the shaft (6) via at least two shafts (6), - wherein the arrangement (5) for the respective shaft (6) has a locking mechanism (8) which is adjustable between a locking position in which the locking mechanism (8) prevents the arrangement (5) from pivoting about the pivot axis (7) belonging to the shaft (6) and an adjustment position in which the locking mechanism (8) allows the arrangement (5) to pivot about the pivot axis (7), characterized by , - that the assembly (1) for the respective shaft (6) has a spring assembly (9) comprising at least one spring (10), - that the spring device (9) in the adjustment position of the locking mechanism (8) belonging to the shaft (6) acts resiliently on the arrangement (5) such that the arrangement (5) in the adjustment position of the associated locking mechanism (8) is fixed against pivoting movements about the pivot axis (7) belonging to the shaft without additional force and when additional force is applied about the pivot axis (7) - that the arrangement (5) has at least one support arm (11) for supporting the attachment (38), which is pivotable about the pivot axis (7) belonging to the shaft (6) via at least one of the at least one shaft (6), - that the arrangement (5) has a first support arm (11, 11a) and a second support arm (11, 11b), - that the first support arm (11, 11a) is connected to a shaft (6) in a rotationally fixed manner, - that the second support arm (11, 11b) is pivotable about a second pivot axis (7, 7b) via the shaft (6), so that the support arms (11) are pivotable relative to each other via the shaft (6), - that the arrangement (5) has a bracket (12) for attaching the attachment (38) to the assembly (1), - that the holder (12) is pivotable about the pivot axis (7) belonging to the shaft (6) via one of the at least one shaft (6). [2] Assembly according to claim 1, characterized by , - that the arrangement (5) has an associated receptacle (16) for at least one of the at least one shaft (6) through which the shaft (6) is guided, wherein the receptacle (16) is bounded along the associated pivot axis (7) by at least one end face (17) extending transversely or inclined to the pivot axis (7), - that the associated spring device (9) acts against at least one of the at least one end face (17). [3] Assembly according to claim 1 or 2, characterized by , that at least one friction element (19), in particular a rubber element (20), is arranged between at least one of the at least one spring assembly (9) and the arrangement (5), such that the spring assembly (9) biases the at least one friction element (20) against the arrangement (5). [4] Assembly according to any one of claims 1 to 3, characterized by , that at least one of the at least one spring device (9) acts on the arrangement (5) parallel to the pivot axis (7) of the associated shaft (6). [5] Assembly according to claims 3 and 4, characterized by , that at least one of the at least one spring assembly (9) has a clamping element (22) which is connected to the associated shaft (6) in a rotationally fixed manner and which preloads the at least one spring (10) against the arrangement (5). [6] Assembly according to any one of claims 1 to 5, characterized by, that the assembly (1) has a stop (29) for at least one of the at least one spring assembly (9), wherein the spring assembly (9) biases the arrangement (5) against the stop (29). [7] Assembly according to any one of claims 1 to 6, characterized by , that at least one of the at least one spring assembly (9) has at least one disc spring (18). [8] Assembly according to any one of claims 1 to 7, characterized by , that at least one of the at least one receptacles (16) is formed in an associated support arm (11) which has at least one of the at least one associated end face (17). [9] Assembly according to any one of claims 1 to 8, characterized by , - that at least one of the at least one support arm (11) is designed as a slotted clamping arm (34) which has at least two legs (36) separated by a slot (35) which accommodate at least one of the at least one associated shaft (6), - that the associated locking mechanism (8) clamps the legs (36) in the locking position against at least one associated shaft (6). [10] Assembly according to any one of claims 1 to 9, characterized by , that at least one of the at least one locking mechanism (8) in the locked position acts on an associated spring assembly (9), so that the spring assembly (9) acts more strongly on the arrangement (5) in the locked position than in the adjustable position. [11] Assembly according to any one of claims 1 to 10, characterized by , that at least one of the at least one locking mechanism (8) has a tension lever (27) adjustable for adjusting the locking mechanism (8). [12] Assembly according to any one of claims 1 to 11, characterized by that the arrangement (5) has at least two shafts (6) and the associated pivot axes (7) of at least two of the shafts (6) run parallel. [13] Couch (3), in particular for a medical couch (4), with an assembly (1) according to one of claims 1 to 12 and with an attachment (38), in particular a headrest (2), which is adjustable to the couch (3) by means of the assembly.

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