Patent Document

BACKGROUND OF INVENTION 
     1. Field of the Invention 
     The present invention relates in general to a damper mechanism for vehicle glove boxes and particularly to a damper mechanism which is utilizes a cam deflected spring to damp the downward movement of the glove box lid. 
     2. Description of the Related Art 
     In order to improve the feel of smoothness and quality while opening a glove box door, various damping devices have been employed. Such devices include elaborate assemblies of springs, pistons, cams, cables and numerous other arrangements for slowing the descent of the glove box door as it is opened. This is especially desired in the current glove box doors which require a sheet metal liner to meet safety standards. 
     For example, U.S. Pat. No. 4,886,311 issued Dec. 12, 1989 to Trube et al. teaches a glove box lock mechanism mounted in the dash panel. 
     U.S. Pat. No. 5,292,159 issued Mar. 8, 1994 to Sandhu et al. teaches a flush mounted door latching mechanism for use with glove boxes. 
     U.S. Pat. No. 5,385,378 issued Jan. 31, 1995 to Hakamada et al. teaches a glove box opening system that allows the glove box door to be opened further than the normal use position to allow access to the interior area of the dash board for servicing air conditioning or air bag units. 
     U.S. Pat. No. 5,823,583 issued Oct. 20, 1998 to Sandhu et al. teaches a simplified three piece glove box latching mechanism. 
     U.S. Pat. No. 5,868,448 issued Feb. 9, 1999 to Izumo teaches a glove box lid which opens upward instead of downward and a tensioning means to allow the raised glove box lit to remain open until forced downward by the user. 
     U.S. Pat. No. 5,591,083 issued Sep. 14, 1999 to Bittinger et al. teaches damping a glove box door&#39;s movement using a compressible rubber wheel. 
     U.S. Pat. No. 6,152,501 issued Nov. 28, 2000 to Magi et al. teaches a glove box door handle and latch assembly having a mounted door latch that is flush with the exterior door panel. 
     U.S. Patent Application Publication Number 2002/0171248 published Nov. 21, 2002 to Diss et al. teaches a glove box latching assembly having a handle mounted flush with the exterior door panel. 
     Thus there is still a need for an efficient, easy to assembly, cost effective, reduced breakage glove box door damping device. 
     DISCLOSURE OF THE INVENTION 
     The present invention provides advantages and alternatives over the prior art by providing a glove box damping assembly which may be molded-in reducing the manufacturing and assembly costs. 
     According to a further aspect of the present invention, there is provided a glove box damper comprising: a cam assembly comprising a cam lobe attached substantially perpendicular to a pair of mounting spindles and at least two brackets for mounting said cam assembly along the bottom edge of a glove box lid, said glove box lid mounted along its lower edge to a glove box bin allowing said glove box lid to open in a downward direction; a spring assembly comprising body having an integral spring against which said cam lobe is biased and a pair of spindle mounting slots for positioning said cam assembly, mounted on an instrument panel retainer, thereby providing a damping of the downward opening movement of said glove box lid. 
     According to yet another aspect of the present invention there is provided A glove box damper comprising: a cam assembly comprising a cam lobe attached substantially perpendicular to a pair of mounting spindles and at least two brackets for mounting said cam assembly along the bottom edge of a glove box lid, said glove box lid mounted along its lower edge to a glove box bin allowing said glove box lid to open in a downward direction; a spring assembly comprising body having an integral spring against which said cam lobe is biased and having a shape stopping the travel of the cam at a desired point, and a pair of spindle mounting slots for positioning said cam assembly, mounted on an instrument panel retainer, thereby providing a damping of the downward opening movement of said glove box lid as well as a desired amount of travel of said glove box lid. 
     The present invention thus advantageously provides a glove box damper device which is easy to assembly, cost effective, has reduced breakage, and which provides a sense of smooth operation and quality construction to the user. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 shows an exploded sectional partial side plan view of the glove box damper device of the present invention. 
     FIG. 2 shows a perspective view of the cam portion of the glove box damper device of the present invention. 
     FIG. 3 shows a perspective view of the spring portion of the glove box damper of the present invention 
     FIG. 4 shows a plan front view of a portion of an instrument panel retainer containing a glove box opening having the springs and retaining slots for the damper device of the present invention. 
    
    
     DETAILED DESCRIPTION 
     Reference will now be made to the drawings, wherein to the extent possible like reference numerals are utilized to designate like components throughout the various views. Referring to FIG. 1, there is presented an exploded sectional partial plan view of a glove box assembly  100  having the damper device  10  of the present invention. The glove box assembly  100  comprising a glove box body or shell  101  and a glove box lid  102  as is typically mounted in a vehicle. 
     As further shown in FIG. 1 the damper device  10  comprises a cam assembly  20  mounted on or molded into the glove box lid  102  and a spring portion  31  mounted on or molded into the I P retainer  30 . 
     Referring now to FIG. 2, there is shown a perspective view of the cam assembly  20  having a cam lobe  1 , a pair of mounting spindles  2  and a pair of mounting brackets  3 . In practice the mounting spindles  2  are rotatively mounted in retaining slots  32  (FIG. 3) of instrument panel retainer  30  (FIG.  3 ). The cam lobe  1  being substantially perpendicular to mounting spindles  2 . The mounting brackets  3  are fixedly attached to the glove box lid  102  (FIG.  1 ). 
     Turning now to FIG. 3, there is shown the instrument panel retainer  30  having a spring  31  of desired shape molded therein and further having molded therein a pair of retaining slots  32  configured to receive a corresponding pair of mounting spindles  2  (FIG. 2) of the cam assembly  20  (FIG. 2) of the present invention. The spindles  2  (FIG. 2) mounted in the retaining slots  32  position the cam  1  (FIG. 2) to ride against spring  31 . Also shown are mounting slots  33  which provide for easy insertion of the mounting spindles  2  (FIG. 2) into the retaining slots  32 . During the downward opening movement of the glove box lid  102  (FIG. 1) the spring  31  thus exerts a desired force against the rotational movement of cam  1  (FIG. 2) thereby damping and slowing the downward movement of the glove box lid  102  (FIG.  1 ). The spring  31  may also be configured to stop the rotational movement of the cam  1  (FIG. 2) at a predetermined point thereby limiting the opening travel of the glove box lid  102  (FIG.  1 ). 
     Referring now to FIG. 4 there is shown a partial front plan view of an instrument panel retainer  30  having molded therein a plurality of springs  31  and corresponding plurality of paired retaining slots  32  of the present invention. 
     The combination of a cam  1  rotating against a spring  31  results in a resistance to downward movement of the glove box lid  102  thereby giving a passenger operating the glove box a feeling of smooth operation combined with close fitting and accurate quality construction. At the same time this damper device assists in eliminating the sense of weight in the glove box lid  102  again providing a feeling of smooth operation and quality construction. 
     In practice it is preferred for the spring to be about 30% to about one third compressed from its free position when the glove box lid is closed and about one half 50% compressed from its free position when the glove box lid is open. Different amounts of compression on the spring at both the open and closed positions of the glove box lid may be used to provide the desired effect of damping and slowing of the glove box lid travel. 
     The damper device  10  of the present invention may be made of any suitable material or materials well known in this art. Particularly the damper device  10  of the present invention may be made of the same material at that of the instrument panel retainer or it may be made of a different material to achieve the desired properties of providing damping and slowing of the glove box lid during opening. Presently preferred materials include, for example, acrylonitrile-butadiene-styrene (ABS), polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS), the engineered material sold under the brand name NOREL by General Electric Corporation, polypropylene, and other engineered materials well known in this art. It is also to be understood that the various parts of the damper device of the present invention may all be made of the same material or the various parts may of different materials. 
     Although the preferred embodiments of the present invention has been disclosed in connection with one particular example, those skilled in the art will appreciate that various changes and modifications may be made without departing from the scope of the invention as set forth in the appended claims.

Technology Category: 4