The present invention concerns a furniture hinge comprising a fitment portion and a hinge cup pivotably connected thereto by way of at least one hinge lever, wherein the hinge lever is connected to the hinge cup by way of a hinge axis, and a damping device actuable by an actuating element for damping a relative movement between the fitment portion and the hinge cup, wherein the actuating element is mounted within the hinge cup rotatably about an axis of rotation extending substantially parallel to the hinge axis of the hinge cup and the damping device has at least one linear damper which is arranged at the outside of the hinge cup and has at least one linearly displaceable piston.
The invention further concerns an article of furniture having a movable furniture part mounted movably by way of at least one furniture hinge of the kind to be described.
The damping action of a linear damper is essentially based on the flow resistance of a damping fluid in a fluid chamber. Damping devices having a piston with a linear damping stroke usually have a travel-dependent damping function, that is to say the degree of damping is dependent on the available damping stroke of the piston. Thus a sufficient damping travel is accordingly to be provided to achieve the desired soft damping of a relative movement between the fitment portions. A particular requirement is therefore that of arranging the damping device in as space-saving a fashion as possible and inconspicuously on the hinge cup, but at the same time also ensuring an adequate damping stroke and thus a satisfactory damping action in respect of the furniture hinge.
A furniture hinge having a hinge cup and a linear damper arranged at the outside of the hinge cup is known for example from WO 2008/104009 A1 to the present applicant. The linear damper in that case can have a linearly displaceable piston, the direction of the linear movement of the piston being oriented substantially parallel to a hinge axis of the hinge.
WO 2007/038815 A1 to the present applicant also shows in
Therefore the object of the present invention is to propose a furniture hinge of the general kind mentioned in the opening part of this specification, wherein the damping device can be arranged on the hinge cup in an efficient and inconspicuous fashion.
According to the invention that is achieved by the features of claim 1. Further advantageous configurations of the invention are recited in the appendant claims.
According to the invention it is therefore provided that there is provided a transmission mechanism which converts a rotary movement of the actuating element into a linear movement of the piston of the linear damper and the hinge cup and the linear damper or dampers arranged on the hinge cup are arranged in the installation position all within a cylindrical bore in the furniture part.
The pivotally mounted actuating element can be caused to perform a rotary movement as from a predetermined relative position of the fitment portions with respect to each other, wherein the actuating element can be acted upon by a hinge lever of the hinge and/or the carcass-side fitment portion (for example the hinge arm). The transmission mechanism provided can convert that rotary movement of the actuating element into a linear movement of the piston. The transmission mechanism provided can therefore transform a relatively slight rotary movement of the actuating element into an increased linear movement of the piston. In that way it is possible to achieve an enhanced damping travel and consequently also an enhanced damping action on the part of the linear damper, whereby it is possible to provide for efficient movement damping of the movable furniture part. In that case the damping range of the movable furniture part can begin to act as from an angular position of greater than or equal to 35° in relation to the complete end position.
In a possible embodiment it can be provided that the hinge cup has at least one laterally projecting fixing flange, wherein the damping device is arranged beneath the fixing flange and at the outside of the hinge cup. In that way on the one hand it is possible to provide for a very compact installation of the damping device, while on the other hand the damping device does not appear at all externally in the case of a hinge cup when fitted into a standard bore. The damping device can therefore be arranged as a whole structural unit beneath the plane formed by the opening of the hinge cup.
In a preferred embodiment of the invention it can be provided that the direction of the linear movement of the piston extends transversely, preferably substantially at a right angle, to the hinge axis at the hinge cup side. In that case the linear movement of the piston or pistons can be substantially horizontally, that is to say substantially parallel to a support surface of the fixing flange which in the mounted position bears against a surface of the movable furniture part.
A particular advantage is afforded in that the hinge cup together with a housing of the damping device, that at least partially encloses the hinge cup, can be received as a common structural unit in a bore of predetermined nominal diameter, wherein the fixing flange in the mounted position substantially completely covers the housing of the damping device. In that case the housing of the damping device is disposed externally on the hinge cup, that is to say outside the internal cavity in the hinge cup, in which at least one hinge lever of the furniture hinge is immersed in the closing movement. The actuating element of the damping device can be mounted movably within the hinge cup or can extend into the internal cavity in the hinge cup so that it can be actuated by the hinge lever and/or by a fitment portion as from a predetermined angular position of the furniture hinge. In that arrangement the actuating element is mounted on the hinge cup rotatably about a horizontal axis. The rotary angle range of the actuating element in that case is between 70° and 170°, preferably between 130° and 160°.
In a preferred embodiment the piston of the linear damper is guided displaceably in a fluid chamber. The fluid chamber can in that case be in the form of a cavity in a housing of the damping device or alternatively it can be formed by a cavity in a cylinder in which the piston is linearly displaceably guided. The linear damper is desirably in the form of a fluid damper filled with a liquid or gaseous damping medium.
In a desirable configuration the actuating element is operatively connected to the piston of the linear damper at least in the damping stroke of the damping device. In that way the piston of the linear damper can be motionally coupled to the actuating element so that, upon a rotary movement of the actuating element, the piston of the linear damper is also moved therewith, that is to say it is displaced linearly within the fluid chamber. It can also be provided that the actuating element is motionally coupled constantly to the piston of the linear damper by way of the transmission mechanism. The continuous coupling between the actuating element and the piston of the linear damper can provide that force is applied directly to the linear damper in the damping stroke, whereas in the return stroke the actuating element can be moved back again into a position for the next damping stroke, by a return mechanism associated with the linear damper. In that way a specific return mechanism for the actuating element is not necessarily required.
In a preferred embodiment of the invention it can be provided that a side wall of the hinge cup has an opening, wherein the transmission mechanism extends from the inside of the hinge cup through the opening to the outside of the hinge cup. In that respect it may be desirable if the transmission mechanism has at least one lever which is hingedly connected to the actuating element and which is connected (also hingedly) to the piston of the linear damper or can be coupled thereto at least at times. In the damping stroke the lever is operatively connected on the one hand to the actuating element, and on the other hand it is operatively connected by way of a piston rod associated with the piston of the linear damper. It can also be provided that the piston rod is of a cranked shape, wherein the piston rod extends through the opening from the inside of the hinge cup to the outside thereof, by virtue of the cranked shape. In the configuration just described the transmission mechanism includes the lever and the piston rod of the linear damper. The piston and the piston rod can in that case also be of an integral configuration—for example in the form of integral injection molding of plastic material.
In a possible embodiment of the invention the outside of the hinge cup has at least one flat face which makes it possible to mount the damping device. In a development of the invention it can be provided that the hinge cup has oppositely disposed side walls, wherein the side walls at the outside thereof each have a respective flat surface provided for the arrangement of separate damping devices. In a preferred embodiment of the invention it can be provided that the hinge cup at the outside thereof has a respective damping device, wherein the hinge cup together with the damping devices arranged thereon can be jointly inserted within a standard bore provided on a furniture part and is arranged within a notional bore diameter of the standard bore.
To provide an additional damping force each damping device can have a first and a second fluid chamber which are filled with damping fluid and which are connected together by a passage. In this connection it may be desirable if a piston can immerse into the first fluid chamber, the volume of the first fluid chamber being changeable by the piston. A device can be arranged in the second fluid chamber, which is deformable or movable by a flow of damping fluid into or out of the second fluid chamber, to change the volume of the second fluid chamber. The said device can have either a deformable compressible material portion arranged in the second fluid chamber or alternatively a piston displaceable in the second fluid chamber.
The two fluid chambers are therefore connected in serial relationship and are in fluid-conducting communication by way of said at least one passage. The damping fluid of the first fluid chamber, that is displaced by the first piston during the damping stroke, also flows through the passage into the second fluid chamber—apart from a possible residual compressibility of the damping fluid—, wherein the volume of the second fluid chamber can be changed by the fluid pressure. The second fluid chamber thus forms a compensating space for the displaced damping fluid, that is variable during compression or decompression. The second fluid chamber can be arranged in a very compact structure relative to the first fluid chamber, whereby it is possible to achieve particularly small constructions for the damping device. In principle the passage connecting the two fluid chambers can also be of a very short length (for example in the form of a hole in the function of an overflow opening). It is preferably provided that the passage connecting the two fluid chambers extends from the bottom region of the first fluid chamber to the inlet region of the second fluid chamber.
Further details and advantages of the present invention are described by means of the specific description hereinafter. In the drawings:
a, 3b show a perspective view and a sectional view of the hinge cup in the exploded condition of the furniture hinge,
a, 4b show a partly sectional view and an enlarged detail view thereof the furniture hinge with a damping device arranged at the outside,
a-8c show a further embodiment of the invention, wherein the transmission mechanism has a rotatably mounted lever by which at least one piston of the damping device is movable, and
a, 9b show a perspective view and an enlarged detail view thereof of the furniture hinge with the transmission mechanism as shown in
a shows an exploded perspective view of the furniture hinge 3. The fitment portion 4 in the form of the hinge arm can be snapped onto the base plate 7. The hinge cup 5 has a fixing flange 8 for fixing to the movable furniture part 2a, wherein the damping device 11 is mounted in the mounted position at the outside of the hinge cup 5 and beneath the fixing flange 8. The damping device 11 is in the form of a linear damper 12 having a housing 13. The housing 13 which is in the shape of a circular arc has a first fluid chamber 13a in which a first piston 14 having a piston rod 14a is linearly displaceable. The piston rod 14a is of a cranked shape so that in the mounted position the piston rod 14a is disposed at least partially within an opening 5a associated with the hinge cup 5. The end of the piston rod 14a, remote from the piston 14, is hingedly connected to a lever 10 to be arranged in the internal cavity in the hinge cup 5. The other end of the lever 10 is hingedly connected to the rotatable actuating element 9. The actuating element 9 is supported rotatably about an axis of rotation (S) within the hinge cup 5, wherein that axis of rotation (S) can also be seen on the hinge cup 5. In the illustrated embodiment therefore the transmission mechanism is formed by the lever 10 and the piston rod 14a hingedly connected thereto. When the actuating element 9 is acted upon by the hinge lever 6 (
By virtue of that return movement of the first piston 14, because of the permanent coupling (piston rod 14a and lever 10), the actuating element 9 is also moved back again into a starting position for the next damping stroke. In that way it is sufficient if both the two pistons 14, 15 and also the actuating element 9 can be moved again back into the starting position for the next damping stroke by way of the provided return spring 17. It should be noted that the two pistons 14, 15 each terminate in sealing relationship with the inside wall of the two fluid chambers 13a, 13b so that the damping medium is disposed exclusively between the two pistons 14, 15. A sealing element 18 forms the upper termination of the second fluid chamber 13b. The linear movement of the two pistons 14, 15 extends substantially perpendicularly to a hinge axis (A) of the furniture hinge 3. At the outside of mutually opposite side walls the hinge cup 5 has flat surfaces D1 and D2 for arranging the damping device 11. In plan view therefore the hinge cup 5 is at least approximately of a rectangular configuration.
b shows a sectional view of the hinge cup 5 which is sunk in a bore (B) in the movable furniture part 2a. The hinge lever 6 connecting the carcass fitment portion 4 and the hinge cup 5 is mounted to the hinge cup 5 at a hinge axis A. The actuating element 9 mounted rotatably about the axis of rotation (S) is arranged pivotably at the inside of the internal cavity in the hinge cup 5. The lever 10 is hingedly connected to the actuating element 9. It is possible to see the piston rod 14a which is hingedly connected to the lever 10 by way of the opening 5a in the hinge cup 5.
a shows a partly sectional view of the furniture hinge 3, wherein the damping device 11 in the installed position is mounted at the outside of the hinge cup 5 and is completely covered by the fixing flange 8. The housing 13 of the damping device 11 has a circular peripheral surface so that the hinge cup 5 together with the surrounding housing 13 of the damping device 11 is accommodated within the provided bore (B) (
a-8c show a somewhat modified embodiment of the transmission mechanism for converting a rotary movement of the actuating element 9 into a linear movement of the piston 14, wherein the transmission mechanism has a lever 25 mounted pivotally about the axis of rotation (S) instead of the previously illustrated lever 10 and the piston rod 14. The axis of rotation (S) is arranged coaxially with the axis of rotation of the actuating element 9 mounted in the interior of the hinge cup 5, wherein the actuating element 9 and the pivotable lever 25 can be mounted on a common shaft and are non-rotatably connected together. In a movement of the actuating element 9 therefore the lever 25 is also rotated about the axis of rotation (S). The lever 25 is mounted outside the hinge cup 5 and can be mounted in the housing 13 shown in
a shows a perspective and partly broken-away view from above of the furniture hinge 3. The fitment portion 4 in the form of the hinge arm is hingedly connected to the hinge cup 5 by way of at least one hinge lever 6. It is possible to see the actuating element 6 which is pivotable about the axis of rotation (S) and which can be caused to perform a pivotal movement towards the end of the closing movement of the hinge 3 by the hinge lever 6. Mounted at the outside of the hinge cup 5 is the lever 25 which is motionally coupled to the actuating element 9 so that in a rotary movement of the actuating element 9 the lever 25 is also moved. The movement of at least one piston 15 of the linear damper can be caused to occur by the lever 25. The hinge cup 5 and the linear damper or dampers 12 arranged on the hinge cup 5 are all arranged in the installation position within a cylindrical bore (B) in the furniture part 2a (see
b shows a view on an enlarged scale of the broken-away detail of
The present invention is not limited to the illustrated embodiments but includes or extends to all variants and technical equivalents which can fall within the scope of the appended claims. The positional references adopted in the description such as for example up, down, lateral and so forth are also related to the directly described and illustrated Figure and are to be appropriately transferred to the new position upon a change in position.
Number | Date | Country | Kind |
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A 477/2009 | Mar 2009 | AT | national |
Number | Date | Country | |
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Parent | PCT/AT2010/000080 | Mar 2010 | US |
Child | 13215504 | US |