Patent Application
20150337578
The present invention relates to hinges for use in connection with furniture, in particular, to a plastic insert for use in a hinge that reduces the noise associated with the operation of the hinge and prolongs the service life of the hinge spring.
When furniture, such as cabinets, for example, has movable parts, such as doors, those movable parts are often mounted to the main furniture member using a movable member such as a hinge. While hinges are known in the art, there are some problems associated with conventional hinges that the present invention seeks to solve.
One problem is that because a majority of the components of conventional hinges are made of metal, and the metal components come into mechanical and frictional contact with one another, there can be a significant amount of noise associated with the operation of the hinge during use. Accordingly, it would be desirable to provide a hinge having a member that reduces the noise otherwise associated with the hinge operation.
Another problem is that hinges whose control cam or hinge pin is spring activated tend to experience spring breakage over time due to the high spring loads required to produce the opening and closing forces during hinge operation. This usually leads to hinge replacement as a whole, which can be costly and inconvenient. Accordingly, it would be desirable that to provide a hinge having a spring that is not readily susceptible to such breakage, and which facilitates a longer functional life of the hinge.
U.S. Pat. No. 8,689,402 discloses a furniture hinge including plastic sliding members that fit over the ends of each spring leg to engage the spring on the interior surface and the control cam on the exterior surface. While this solution may alleviate some frictional issues and allegedly prolong the spring life, it is clear that separate sliding members are required for each individual spring leg of the hinge. Not only does this require multiple pieces, but preferably according to the '402 patent, additional lubrication means is provided within interior portions of the sliding members. All of factors increase the cost and complicate the steps for fabrication and installation of the hinge.
In view of the above, it would be desirable to provide a hinge that effectively and simultaneously reduces the noise associated with hinge operation and prolongs the spring life without adding multiple additional parts or increasing the cost and the difficulty of the steps associated with the fabrication and installation of the hinge.
It is the object of the present invention to provide a hinge including a single member that effectively addresses both of the aforementioned problems by simultaneously reducing the noise associated with hinge operation and prolonging the spring life, without increasing the cost or complicating the steps required for fabrication or installation of the hinge.
According to a first aspect of the present invention, a hinge is provided, comprising a hinge arm and a hinge cup connected to one another by a hinge pin at a joint in association with a spring, and an insert provided on the hinge arm at the joint and having an external surface which the spring slidably contacts. According to this aspect of the present invention, an end of the hinge arm having a bore passing therethrough for receiving the hinge pin at the joint is disposed between the two opposed cylindrical portions of the insert, so that the respective bores are coaxially aligned.
The insert also comprises a planar portion disposed between two transversely opposed cylindrical portions respectively having coaxial central bores. The insert comprises snap-fit means for attaching the insert to the hinge arm, located on one of (i) the cylindrical portions of the insert and (ii) the planar portion of the insert.
It is also preferred that at least a portion of the insert comprises a seat portion extending in the transverse direction for receiving an end portion of the hinge arm. It is also preferred that a portion of the outer peripheral surface of each cylindrical portion is a curved plane defining the external surface on which a leg portion of the spring slidably contacts.
The insert is preferably a single, unitary body made of a plastic material.
The hinge according to the present invention can further comprise a damping mechanism located in the hinge cup to control the closing speed of a movable furniture member, such as a cabinet door, for example, to which the hinge is attached.
According to another aspect of the present invention, a furniture hinge is provided, comprising a hinge arm, a hinge cup, a hinge pin connecting the hinge arm to the hinge cup at a joint, and a plastic insert attached directly to the hinge arm and interposed between the hinge arm and the hinge cup, wherein the hinge pin passes thorough coaxially aligned openings in the hinge cup, the plastic insert, and the hinge arm to define the joint. Preferably, the hinge further comprises a spring having at least one leg associated with the hinge pin.
The plastic insert comprises two transversely opposed cylindrical portions sandwiching a portion of the hinge arm therebetween, and preferably, a portion of an external surface of each of the cylindrical portions of the plastic insert has a curved plane portion proximate the joint.
According to this aspect of the present invention, at least a portion of at least one of the legs of the spring slidably contacts a portion of the external surface of the plastic insert proximate the joint. It is preferred that at least a portion of at least one of the legs of the spring slidably contacts at least one of the curved plane portions of the external surfaces of the cylindrical portions of the plastic insert proximate the joint. It is also preferred that the plastic insert is directly attached to the hinge arm via snap fit members extending therefrom that clip to the hinge arm above the joint.
The furniture hinge according to this aspect of the present invention can further comprise a damping mechanism located in the hinge cup to control the closing speed of the furniture to which the hinge is attached.
For a better understanding of the nature and objects of the invention, reference should be made to the following detailed description of a preferred mode of practicing the invention, read in connection with the accompanying drawings, in which:
The hinge 10 according to the present invention includes many parts that are typical of hinges, such as a hinge cup 4 which is adapted to be affixed to the movable member of the furniture piece, such as cabinet door 2, and a base plate 3, which is adapted to be fixed to the stationary member of the furniture piece, such as cabinet 1. The hinge arm 8 is adjustably attached to the base plate 3 via the adjustment screw 85 and cam 86. Other examples of hinges that can be fitted with an insert according to the present invention include, but are not limited, to Applicant's U.S. Pat. Nos. 5,604,956, 6,647,591, 6,996,877, and 7,117,561 for example, the entire disclosures of which are incorporated herein by reference.
As shown in
The hinge 10 also includes a spring 7 which acts in association with the hinge pin 6 to control the opening and closing force of the hinge 10 in the known manner. In the present invention, however, the leg 72 of the spring 7 slidably contacts an external surface 93 of the insert 9 proximate the joint at the hinge pin 6. For example, the leg 72 of the spring 7 is preferably slidably situated on the surface 93a (see
Any suitable plastic material can be used for the insert 9. Preferably, the plastic is a thermoplastic material or another polymeric material, for example. The insert 9 can be formed by any known plastic forming technique, suitable examples of which include, but are not limited to, injection molding and die casting, for example. These materials and methods are readily available and inexpensive, making the ease of manufacture high and cost of providing the insert 9 low.
The positioning of the insert 9 in between the metal members (i.e., the hinge pin 6, the lever 80, and the hinge cup 4) at the joint facilitates the noise reduction feature attributable to the present invention by virtue of the fact that the insert 9 is made of a plastic material. The plastic material reduces the friction or abrasion of metal-on-metal at the joint caused by the operation of the hinge, and the sound damping quality provided by the plastic material further lessens the effects of any residual noises. The structure of the hinge joint also enables simplification of the production process.
As shown in
As shown in
The sliding contact between the spring and the insert 9 proximate the hinge pin joint not only reduces the noise associated with hinge operation, but also facilitates proper spring in connection with the hinge pin while reducing the damage caused by metal-on-metal wear and friction, thus prolonging the life of the spring 7 and the functional life of the hinge 10.
The cylindrical portions 90 of the insert 9 are also provided with notches 94 formed on the inner lateral surface 90b near the bottom. The notches 94 are mechanical means provided to assist in the assembly of the insert 9 onto the lever 80 in connection with its location in the hinge joint region. The outer lateral surface 90a of the cylindrical portion 90 is substantially parallel to the inner surface 90b and defines a peripheral portion of the curved plane shape proximate 93a and an edge of the outer peripheral surface 93, as shown in
The insert 9′ according to another embodiment of the present invention shares many similar features as the insert 9. For example, the insert 9′ shown in
As shown in
Similar to the insert 9, a portion of the outer peripheral surface 903 of each cylindrical portion 900 of the insert 9′ has a curved plane shape defining a portion of the the external surface 903a on which at least the spring leg 72 is slidably situated proximate the joint of the hinge pin 6. The insert 9′ also preferably has a symmetrical shape, as shown in
Also like the insert 9 described in connection with
Preferably, the inserts 9, 9′ according to the present invention are a single, unitary body. It should be noted, however, that the inserts can be formed as two or more separate bodies that are snap-fit together, for example, or otherwise joined to then define a single body prior to assembly in the hinge 10. Since the insert 9 (or 9′) is a single piece when assembled to form the hinge, the two-fold benefits attributable to the present invention can be realized without the need for adding multiple pieces in different locations within the hinge structure. The hinge 10 can be assembled in an easy fashion by including the snap-fit insert member in the assembly steps as described above, without complicating the manufacture of the hinge 10 or complicating the later installation thereof in the furniture. If necessary, an existing in situ hinge can be removed and retrofitted with the insert according to the present invention with relative ease once the hinge is partially disassembled, and the reassembled and installed.
As also shown in
The present invention solves the noise and spring breakage problems associated with conventional hinges by providing a hinge including a single member in the form of a plastic insert that is directly attached to the lever of the hinge arm that simultaneously reduces the noise associated with hinge operation and prolongs the spring life, without significantly increasing the costs or complicating the required steps for fabrication or installation of the hinge.
While the present invention has been particularly shown and described with reference to the preferred mode as illustrated in the drawings, it will be understood by one skilled in the art that various changes in detail may be effected therein without departing from the spirit and scope of the invention as defined by the claims.
