Abstract:
A housing for an electronic apparatus capable of being mounted in a rack by a rack ear is presented, the housing including an upper housing portion having a top and left and right sides, wherein each of the sides of the upper housing portion has an upper groove portion defined therein, the upper groove portion formed by a indentation formed in each of the sides; a lower housing portion having a bottom and left and right sides, wherein each of the sides of the lower housing portion has a lower groove portion defined therein, the lower groove portion formed by a indentation formed in each of the sides, wherein the upper housing portion and the lower housing portion cooperate to form the housing, and further wherein, when the upper housing portion and the lower housing portion are combined to form the housing, the upper groove portion and the lower groove portion combine to form a track groove shaped to receive a rack mounting ear are formed on the left and right sides of the housing.

Description:
RELATED APPLICATION 
     This application claims benefit under 35 U.S.C. §119(e) of U.S. Provisional Patent Application Ser. No. 60/369,909 filed Apr. 4, 2002, entitled “Clamshell Housing with Sliding Rack Ears,” the details and disclosure of which are hereby incorporated by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to housing constructions for rack mounted electronic equipment. More particularly, the present invention relates to audio equipment featuring a unique and convenient method of mounting within an audio rack. 
     2. Description of the Prior Art 
     Conventional construction of housings for rack mounted electronic equipment, such as audio equipment like audio amplifiers, generally comprises a rectangular sheet metal box formed from portions of bent sheet metal. Typically, these housings have “rack ears” permanently mounted thereon. The rack ears can be adjustable with respect to the housing itself, and engage mounting positions in a rack, which thereby allows them to be mounted at various locations in the rack. Typical of such constructions is that disclosed by Carbonneau and Kibler in U.S. Pat. No. 6,360,900 in which an adjustable rack mounting system for a data storage chassis is described. 
     Other mounting systems, which have been suggested in the art, including that of O&#39;Sullivan and Farrell in U.S. Pat. No. 6,061,244 in which a disk drive case for a computer having a pivoting hook is described. In U.S. Pat. No. 4,120,545, Happak and Whittman disclose a housing having lateral depressions to accommodate guide elements for sliding the housing into a rack. Other similar mounting structures are shown by Sisk, Shapiro, Vesciglio, and Watkin in U.S. Pat. No. 3,228,532 and Suzuki in U.S. Pat. No. 4,710,136. Although each of these patents describe differing apparatus for mounting electronic equipment in a rack or related structure, none provide the flexibility and adaptability sought after in the art. 
     What is desired, therefore, is a rack mounting system for electronic equipment, especially audio equipment, which provides increased flexibility in mounting the equipment in a rack. In addition, because of the thermal demands of professional audio equipment, a rack mounting system which permits greater thermal dissipation from the equipment is also highly desired. 
     SUMMARY OF THE INVENTION 
     The present invention provides a housing for rack mounted electronic equipment, especially audio equipment, such as audio amplifiers and the like. The inventive housing comprises upper and lower housing portions which cooperate to form the equipment housing within which electronic components, such as those of an audio amplifier, are housed. Each of the upper and lower housing portions comprise upper and lower track groove portions defined therein such that when the upper and lower housing portions are mated to form the housing, track grooves shaped to receive a “rack ear” or bracket are formed therein on either side of the housing. In use, the track grooves are engaged by the rack ears which thereby mount the electronic equipment into the rack. Thus, adjustability of the rack ears provides ready adjustability for mounting of the electronic equipment. 
     Accordingly, it is an object of the present invention to provide an improved housing construction for rack mounted electronic equipment. 
     Another object of the invention is the provision of improved housing construction for an audio amplifier. 
     Still another object of the present invention is a housing construction for electronic equipment which permits ready adjustability of the mounting of the electronic equipment in a rack. 
     Another object of the invention is to provide a housing construction for an audio amplifier which provides superior thermal dissipation characteristics. 
     Still another object of the invention is to provide an infinitely variable adjustment to suit a wide variety of known and unknown rack depths over the given range of the rack ear. 
     These objects and other which will be apparent to the skilled artisan upon reading the following description can be achieved by providing a housing for an electronic apparatus capable of being mounted in a rack by a rack ear, the housing including an upper housing portion having a top and also having left and right sides, each of the left and right sides of the upper housing portion having a front portion and a rear portion, wherein each of the sides of the upper housing portion has an upper groove portion defined therein, the upper groove portion formed by a indentation formed in each of the sides of the upper housing portion; a lower housing portion having a bottom and also having left and right sides, each of the sides of the lower housing portion having a front and a rear, wherein each of the sides of the lower housing portion having a lower groove portion defined therein, the lower groove portion formed by a indentation formed in each of the sides of the lower housing portion, wherein the upper housing portion and the lower housing portion cooperate to form the housing having left and right sides, and further wherein, when the upper housing portion and the lower housing portion are combined to form the housing, the upper groove portion and the lower groove portion combine to form a track groove shaped to receive a rack mounting ear on the left and right sides of the housing. 
     In the inventive housing, the upper groove portion has a wider portion disposed near the rear of the upper housing portion and extending closer to the top of the upper housing portion and a narrower portion disposed closer to the front of the upper housing portion than the wider portion and not extending as close to the top of the upper housing portion as the wider portion. Similarly, the lower groove portion has a wider portion disposed near the rear of the sides of the lower housing portion extending closer to the bottom of the lower housing portion and a narrower portion disposed closer to the front of the lower housing portion than the wider portion and not extending as close to the bottom of the lower housing portion as the wider portion. Thus, the track groove formed from the combination of the upper groove portion and the lower groove portion has a front-most narrow portion and a rear-most wide portion. 
     In a preferred embodiment, at least one of the upper track groove portions and lower track groove portions includes a slot formed by forming a lip about at least a portion of the periphery of at least one of the upper track groove portions and lower track groove portions. Most preferably the lip formed about at least a portion of the periphery of at least one of the upper track groove portions and lower track groove portions is integral with the unindented body of the side of the housing on which it is located. 
     Associated with the inventive housing is a rack ear shaped so as to be capable of being received in each of the track grooves. Moreover, the rack ear comprises an ear portion capable of being mounted to a rack for electronic apparatus. Preferably, the rack ear has a front-most narrow portion and a rear-most wide portion and is shaped so as to be capable of being received in each of the track grooves. When the track grooves have slots formed therein, the rack ear preferably has a lip portion formed in at least a portion of its periphery, the lip portion sized to be received in the slot formed in at least one of the track grooves. 
     Advantageously, the inventive housing also has a front panel having extensions therefrom which have mounting holes for mounting to the front portion of a rack for electronic apparatus. 
     It is to be understood that both the foregoing general description and the following detailed description present embodiments of the invention and are intended to provide an overview or framework of understanding the nature and character of the invention as it is claimed. The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate various embodiments of the invention and together with the description serve to explain the principles and operations of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front perspective view of a housing construction in accordance with the present invention. 
         FIG. 2  is a rear perspective view of the housing construction of FIG.  1 . 
         FIG. 3  is a rear plan view of the housing construction of FIG.  1 . 
         FIG. 4  is a top plan view of the housing construction of  FIG. 1 , mounted in a rack. 
         FIG. 5  is a front perspective view of the housing construction of  FIG. 1 , with rack ears partially inserted in the track grooves thereof. 
         FIG. 6  is a front perspective view of the upper housing portion of the housing construction of  FIG. 1 , with a rack ear partially inserted in the track groove portion thereof. 
         FIG. 7  is a rear perspective view of the upper housing portion of the housing construction of  FIG. 1 , with a rack ear partially inserted in the track groove portion thereof. 
         FIGS. 8 and 9  are exploded views of a housing construction in accordance with the present invention. 
         FIG. 10  is a rear perspective view of the housing construction of  FIG. 1 , with rack ears shown about to be inserted in the track grooves thereof. 
         FIG. 11  is a rear perspective view of the housing construction of  FIG. 1 , with rack ears shown about to be inserted in the track grooves thereof. 
         FIG. 12  is a partial front perspective view of the housing construction of  FIG. 1 , having the front panel door in the open position. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will now be described in greater detail with respect to the aforementioned drawings. Like or similar reference numerals will be used to denote like elements whenever possible. The housing construction will be described in terms of professional audio equipment for mounting in a rack; such as for convenience only. It will be understood that the inventive housing construction can be applied to any suitable electronic components for rack mounting. Likewise, the invention will be described with respect to a specific orientation and relationship of elements with respect to each other, but it will be recognized by the skilled artisan that other orientations and relationships will be equally applicable. 
     Referring now to the drawings, and particularly to  FIG. 1 , a housing for an electronic apparatus is shown and generally designated by the numeral  10 . Housing  10  comprises an upper housing portion  20 , a lower housing portion  30  and front housing panel  12  and rear housing panel  14 . Each of upper and lower housing portions  20  and  30  and front and rear panels  12  and  14  can be formed of metal such as die cast aluminum or, alternatively, they can be molded out of plastic, polycarbonate or other resin materials or formed of cast zinc or other metals. 
     Upper housing portion  20  and lower housing portion  30  each comprise left side portions (denoted  20 L and  30 L) and right side portions (denoted  20 R and  30 R), where these side portions mate to form housing  10 . In other words, in forming housing  10 , upper housing portion  20  and lower housing portion  30  are fitted together such that left side portion  20 L of upper housing portion  20  meets and mates with left side portion  30 L of lower housing portion  30 ; likewise, right side portion  20 R of upper housing portion  20  meets and mates with right side portion  30 R of lower housing portion  30 . It will be noted that the designations “left” and “right” are for the sake of convenience only, and refer to housing  10  in the orientation illustrated in FIG.  4 . 
     Likewise, although upper and lower housing portions  20  and  30  and front and rear housing panels  12  and  14  can comprise individual elements to be combined to form housing  10 , either upper housing portion  20  or lower housing portion  30  can be formed with front panel  12  and rear panel  20  integral therewith. Or upper and lower housing portions  20  and  30  can be formed with one of front and rear housing panels  12  and  14  and vice versa. 
     In use, one or both of upper and lower housing portions  20  and  30  comprise the electronic components (generally denoted herein at  100 ) which, taken together, form the electronics contained in housing  10 . For instance, electronics  100  can be those electronics necessary for audio amplification, when housing  10  is used for an audio amplifier. Other electronic components can also be housing within housing  10 , depending on the desired end use. Typically, rear housing panel  14  contains plugs  14 A in operative communication with electronic components  100  for power and audio contact with components  100 . Cooling vents  14 B can also be found in rear housing panel  14 . Also typically, front housing panel  12  can have control knobs  12 A for electronic components  100 , as well as cooling vents  12 B. 
     As best seen in  FIGS. 6-8 , upper housing portion  20  comprises upper track groove portions  22  formed therein. More specifically, an upper track groove portion  22 L is formed on left side  20 L of upper housing portion  20 , and another upper track groove portion  22 R is formed on right side  20 R of upper housing portion  20 . Track groove portions  22 L and  22 R can be formed in upper housing portion  20  by machining, molding, or more preferable, by casting as part of the casting operation which formed upper housing portion  20 . 
     Similarly, lower housing portion  30  has a right side lower track groove portion  32 L formed therein on left side  30 L thereof and a left side lower track groove portion  32 R formed therein on the right side  30 R thereof in a similar manner as described in upper housing portion  20 . 
     When upper and lower housing portions  20  and  30  are joined together to form housing  10 , upper right side track groove portion  22 L combines with lower right side track groove  32 L to form a left side track groove  40 L. In the same manner, left side upper track groove portion  22 R and left side lower track groove portion  32 R combine to form a right side track groove  40 R, formed in a left and right sides of housing  10  as best illustrated in  FIGS. 10 and 11 . 
     Housing  10  can be formed from upper housing portion  20  and lower housing portion  30  by conventional means. For instance, they can be bolted or screwed together or in the alternative, a lip can be formed on one of upper and lower housing portions  20  and  30 , such as lower housing portion  30  to be engaged by a slot formed in upper housing portion  20 , or combinations thereof. Front and rear panels  12  and  14  can then be attached (such as by screws, bolts, or other like attachment elements) to the combined upper housing portion  20  and lower housing portion  30 . 
     Right and left track grooves  40 R and  40 L are sized and shaped so as to receive a sliding rack ear on either side thereof. More specifically, track groove  40 L can receive a left side sliding rack ear  50 L and track groove  40 R can receive a right side sliding rack ear  50 R, each of right and left side sliding rack ears  50 R and  50 L being mounted in a rack  200  in which housing  10 , and electronic equipment disposed within housing  10  is sought to be mounted. 
     As illustrated in  FIGS. 10 and 11 , right and left track grooves  40 R and  40 L each have a forward-most (with respect to front and rear of housing  10 ) reduced-width segment,  41 L and  41 R, and a rear-most increased-width segment,  42 L and  42 R. In other words, forward-most segments  41 L and  41 R are closer to front panel  12  than are rear-most increased-width segments  41 L and  41 R. Right and left sliding rack ears  50 R and  50 L each include a forward-most reduced-width segment  51 R and  51 L and a rear-most increased-width segment  52 R and  52 L complementary to the reduced-width segments  41 L and  41 R and increased-width segments  42 L and  42 R of right and left track grooves  40 L and  40 R. In addition, rack ears  50 L and  50 R each include an ear portion  54  defined thereon, for mounting of rack ears  50 L and  50 R to rack  200 . 
     In this manner, as housing  10  is slid onto rack ears  50 L and  50 R, forward-most reduced-width segments  51 L and  51 R of rack ears  50 L and  50 R are engaged by forward-most reduced-width segments  41 L and  41 R of track grooves  40 L and  40 R and then rear-most increased-width segments  52 L and  52 R of rack ears  50 L and  50 R are engaged by rear-most increased-width segments  42 L and  42 R of track grooves  40 L and  40 R in order to thereby mount housing  10  on rack ears  50 L and  50 R. 
     As best seen in  FIG. 2 , right and left track grooves  40 R and  40 L are open at their rearward ends  44 R and  44 L, with respect to right and left sides of housing  10 , in order to receive rack ears  50 R and  50 L therein. 
     In order to securely engage rack ears  50 L and  50 R, track grooves  40 R and  40 L are formed with slots formed therein sized to receive the edges of rack ears  50 L and  50 R. The slots are formed in track grooves  40 R and  40 L by forming each of right and left upper and lower track groove portions  22 R,  22 L,  32 R, and  32 L so as to have inner walls  22 R′,  22 L′,  32 R′ and  32 L′ and outer walls  22 R″,  22 L″,  32 R″ and  32 L″ with a space therebetween comprising the slot formed along the periphery of track grooves  40 R and  40 L when upper and lower housing portions  20  and  30  are mated to form housing  10 , as illustrated in  FIGS. 6-8 . 
     Similarly, rack ears  50 L and  50 R can each comprise a lip  56  extending about the perimeter thereof, wherein lip  56  is received in the slots formed in track grooves  40 R and  40 L such that lip  56  is retained in place within track grooves  40 R and  40 L. 
     The elongated nature of forward-most reduced-width segments  51 L and  51 R of rack ears  50 L and  50 R and their close sliding fit within forward-most reduced-width segments  41 L and  41 R of track grooves  40 L and  40 R allows track grooves  40 L and  40 R to slide forward and rearward on rack ears  50 L and  50 R while maintaining a substantially rigid structural engagement between track grooves  40 R and  40 L and rack ears  50 R and  50 L, thus allowing housing  10  to be mounted in an adjustable fashion within a conventional equipment rack. Rack ears  50 L and  50 R are mounted to rack  200  through ears  54 , such as by the use of screws, bolts or other like mounting devices. 
     In a preferred embodiment, front panel  12  of housing  10  also comprises panel ears  12 C which are then mounted to a front of the rack and thus secure housing  10  within the rack and prevent housing  10  from sliding forward even when rack ears  50 L and  50 R are not fully engaged by track grooves  40 R and  40 L. 
     As noted above, front housing panel  12  also comprises apertures  12 B formed therein. Rear housing panel  14  has complimentary apertures  14 B also formed therein. Apertures  12 B and  14 B combine to provide a passageway for air through housing  10  in order to provide thermal dissipation and help keep electronic equipment mounted in housing  10  cool. By use of rack ears  50 L and  50 R and track grooves  40 R and  40 L to mount housing  10  in a suitable rack  200 , air flow through housing  10  is maximized by avoiding air flow blockages caused by butting housing  10  directly against a solid surface which would otherwise block air flow. 
     In addition, front panel  12  can also comprise and access door  12 D, shown in a closed position in  FIGS. 1 and 5  and in an open position in  FIG. 12  which can conceal control knobs  12 A for the electronic apparatus. 
     As noted above, housing  10  can be formed of die cast aluminum as opposed to prior art housings formed of bent sheet metal. One of the advantages in the use of die cast aluminum is in superior thermal transfer capability for dissipating heat generated within the housing. In additions, die casting provides the formation in housing  10  of complex features, such as apertures  12 B and  14 B and track grooves  40 R and  40 L. 
     All cited patents and publications referred to in this application are incorporated by reference. 
     The invention thus being described, it will be apparent that it may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention and all such modifications as would be apparent as one skilled in the art are intended to be included within the scope of the following claims.