referring to the figures , and in particular fig1 - 3 , a toothbrush sanitizing device according to this invention is illustrated , toothbrush sanitizing device 10 , which includes outer housing 12 , inner housing 14 , ultra - violet light assembly 16 , cover member 18 , plug - in transformer unit 20 and mounting bracket 22 . outer housing 12 , inner housing 14 and cover member 18 are preferably molded from a white plastic material such as abs or any other suitable , non - conductive material which will not deteriorate when frequently exposed to ultra - violet light . in the embodiment illustrated in the figures , outer housing 12 is generally a hollow cylinder having one end closed . outer housing 12 includes base or bottom wall 26 and cylindrical side wall 28 . base 26 and side wall 28 are integrally formed . an upper open end is defined by top rim 24 of side wall 28 . base 26 includes outer rim portion 27 and inner concave portion 29 . rim portion 27 is flat and has four drainage openings 30 extending therethrough and three equally spaced support lugs or foot members 32 extending downwardly therefrom . in the embodiment illustrated in the figures , drainage openings 30 are semicircles and lugs 32 are curved flanges . however , openings 30 and lugs 32 can be of any shapes which are functional . side wall 28 of outer housing 12 has outer surface 34 , inner surface 36 , cord slot 38 , first mounting bracket opening 40 , second mounting bracket opening 42 and cut out 44 . cord slot 38 and cut out 44 extend downward , from top rim 24 , in side wall 28 , cut out 44 being of a generally rectangular shape . first mounting bracket opening 40 is generally rectangular in shape . second mounting bracket opening 42 is circular in shape , adapted to receive a portion of mounting bracket 22 , as discussed below . in the embodiment illustrated in the figures , inner housing 14 is generally cylindrical and includes four top surfaces 46 , four side surfaces 48 , centering flanges 70 , circular rim 72 , lamp cavity 74 , indicator panel 76 , four recessed portions 52 , protrusions 54 and drainage positioning feet 92 . all of these elements are integrally formed except for indicator panel 76 . top surfaces 46 of inner housing 14 extend from rim 72 to the periphery of inner housing 14 and are sloped slightly downwardly from rim 72 to the periphery for draining water away from light assembly 16 ( discussed below ). top surfaces 46 are spaced by the upper ends of recessed portions 52 , as discussed below . in the embodiment illustrated in the figures , top surfaces 46 are substantially flat , smooth surfaces . one of the top surfaces 46 has an indentation therein to receive indicator panel 76 , as discussed below . a centering flange 70 extends upwardly , substantially perpendicular to top surfaces 46 , from one side edge of each top surface 46 . the outer edges of flanges 70 slope inwardly to guide cover member 18 onto outer housing 12 when a person places cover member 18 onto housing 12 ( as discussed below ). one of the flanges 70 is wider than the other flanges 70 , and houses lever 120 ( described below ). rim 72 surrounds lamp cavity 74 and is elevated above top surfaces 46 to prevent water from the toothbrushes properly placed within devices 10 from draining into light bulb cavity 74 . rim 72 has a gap therein which receives a portion of indicator panel 76 , as discussed below . lamp cavity 74 includes ring base portion 78 , inner cylindrical wall portion 82 , spherical wall portion 84 , lamp socket support member 86 and cross member 87 . spherical wall portion 84 extends downward and inward from rim 72 . cylindrical wall portion 82 begins at the lower edge or rim of spherical wall portion 84 and extends downwardly therefrom , substantially vertical . ring base portion 78 is at the lower edge or rim of cylindrical wall 82 and extends between cylindrical wall portion 82 and lamp socket support member 86 . lamp socket support member 86 is a cylinder which receives lamp socket 102 ( described below ) therein by interference fit . cross member 87 extends between cylindrical wall portion 82 and lamp socket support member 86 . lamp socket support member 86 is approximately centered in lamp cavity 74 by ring base portion 78 and cross member 87 . ring base portion 78 includes mounting lugs 114 which extend downward ( see fig6 ). drainage holes 80 are formed in lugs 114 to permit water to drain from lamp cavity 74 . outer side surfaces 48 have the same curvature and are spaced by the four recessed portions 52 . protrusions 54 protrude outwardly from side surfaces 48 . each side surface 48 has one of the protrusions 54 extending downwardly from upper surface 46 . the function of protrusions 54 is discussed below . in the embodiment illustrated in the figures , protrusions 54 are oblong shaped . in addition , one of side surfaces 48 has a slot ( not shown ) therein to receive the cord which extends between light assembly 16 and transformer unit 20 . recessed portions 52 are designed to receive handles of toothbrushes therein and , in combination with outer housing 12 , retain the toothbrush handles . recessed portions 52 include upper portion 56 and lower portion 58 . portions 56 and 58 are formed by inner curved walls , substantially concentric with side surfaces 48 , and side walls , which extend from the inner walls to side surfaces 48 . upper portions 56 open upwardly to upper surfaces 46 of inner housing 14 and extend downward therefrom , longitudinally relative device 10 . a ledge 62 is formed at the lower end of each upper portion 56 for supporting an electric toothbrush . lower portions 58 extend downwardly from ledges 62 , also longitudinally relative device 10 , to lower ledges 64 . the lower ends of the handles of regular or non - electric toothbrushes are supported by lower ledges 64 when the toothbrushes are inserted into recesses 52 . ledges 62 and 64 slope outwardly towards the periphery of inner housing 14 . lower ledges 64 have drainage openings 66 at the bottom thereof for allowing water from toothbrushes retained in recessed portions 52 to drain downwardly and out of inner housing 14 . drainage positioning feet 92 extend downwardly from lower ledges 64 . drainage openings 66 extend through drainage positioning feet 92 . in the embodiment illustrated in the figures , feet 92 are substantially semi - cylindrical in cross section . feet 92 are sized and shaped to be received in drainage openings 30 of the outer housing 12 , as shown in fig5 . drainage positioning feet 92 function to align each recessed portion 52 with a drainage opening 30 so that excess water from toothbrushes placed in device 10 is rapidly and efficiently drained from unit 10 . as shown in fig7 indicator panel 76 is of a generally truncated &# 34 ; pie piece &# 34 ; shape and includes upwardly extending flange 88 and fingers 90 . indicator panel 76 is comprised of a generally transparent material , to enable light to pass therethrough . indicator panel 76 is attached to the top surface 46 having the indentation therein . upwardly extending flange 88 is substantially in line with rim 72 ( see fig1 and 2 ). the outer edge of indicator panel 76 and fingers 90 are received in cut - out 44 in outer housing 14 . inner housing 14 is sized such that the four protrusions 54 frictionally engage inner surface 36 of outer housing 12 for releasably coupling inner housing 14 to outer housing 12 by an interference fit . as used herein , the phrase &# 34 ; interference fit &# 34 ; means any type of connection between outer housing 12 and inner housing 14 which allows assembly by sliding outer housing 12 and inner housing 14 together and disassembly by pulling outer housing 12 and inner housing 14 apart , while maintaining housings 12 and 14 in frictional contact . of course , outer housing 12 and inner housing 14 may be provided with a &# 34 ; snap fit &# 34 ; connection ( i . e ., head and socket type ) or any other quick assembly / disassembly connection . since outer housing 12 and inner housing 14 may be readily taken apart due to their &# 34 ; interference fit &# 34 ;, unit 10 may be easily disassembled for cleaning . further , since outer housing 12 and cover member 18 do not have any electrical parts , they may be washed in a dishwasher or by complete immersion if desired . in addition , since the exterior surfaces of inner housing 14 are comprised of a washable plastic , the exterior surfaces of inner housing 14 can be readily cleaned by a wet cloth after the unit is disassembled . referring to fig8 ultra - violet light assembly 16 includes printed circuit board 100 , light socket 102 , ultra violet light bulb 104 , microswitch 106 and switch assembly 108 . printed circuit boards , such as circuit board 100 , are well known in the art , and thus printed circuit board 100 and its circuitry are not illustrated or described in detail herein . printed circuit board 100 has a generally circular periphery with four cut outs 110 and a pair of mounting openings 112 . cutouts 110 extend inward from the periphery of circuit board 100 and are spaced approximately 90 ° apart . mounting openings 112 extend through circuit board 100 . printed circuit board 100 is mounted to the interior of inner housing 14 by fitting openings 112 around lugs 114 . mounting lugs 114 are then heated in a conventional manner , causing them to expand and engage openings 112 . cut outs 110 are received about the inner surfaces formed by recessed portions 52 . light socket 102 is frictionally received in tubular lamp support 86 of lamp cavity 74 of inner housing 112 and threadedly receives light bulb 104 for supporting light bulb 104 in lamp cavity 74 . light socket 102 is electrically connected to printed circuit board 100 in a conventional manner . light sockets , such as light socket 102 , are well known in the art , and thus light socket 102 is not illustrated or described in detail herein . microswitch 106 is fixedly attached to circuit board 100 . microswitch 106 includes plunger 122 which is moveable vertically . microswitches , such as microswitch 106 , are well known in the art , and thus microswitch 106 is not illustrated or described in detail herein . switch assembly 108 includes contact wire 116 , lever 126 and pivot pin 131 . contact wire 116 includes ends 118 and 120 and legs 119 and 121 . end 118 is fixedly attached to microswitch 106 . leg 119 extends substantially horizontal from end 118 and contacts plunger 122 . leg 121 extends upward from leg 119 as shown in fig8 . end 120 is the free end of leg 121 and contacts lever 126 . lever 126 is basically a flat plate having leg receiving member 128 . leg receiving member 128 is of a greater thickness than the plate formed by lever 126 and includes a recessed portion to receive end 120 of contact wire 116 . lever 126 is pivotably mounted in one of the centering flanges 70 . the centering flange 70 having lever 126 mounted therein has a pair of axially aligned bores for receiving pivot pin 131 therein . lever 126 is mounted on pivot pin 131 to pivotably couple lever 126 to centering flange 70 . leg receiving member 128 of lever 126 engages free end 120 of contact lever 116 , which biases lever 126 in a counter - clockwise direction around pivot pin 131 , as illustrated in fig8 . accordingly , a portion of lever 126 extends outwardly beyond centering flange 70 , for engaging cover member 18 as discussed below . cover member 18 is a hollow cylinder having one end closed . cover member 18 has approximately the same outer diameter as outer housing 12 . cover member 18 also may function as a cup , which is simultaneously sanitized with the toothbrushes in device 10 by the ultra - violet light from light bulb 104 . transformers , such as plug - in transformer unit 20 , are well known in the art , and thus transformer 20 is not illustrated or described in detail herein . plug - in transformer unit 20 reduces the voltage available from a standard wall electrical outlet to a lower voltage for operating toothbrush sanitizer 10 . electrical cord 124 extends from the plug - in transformer unit 20 through cord slot 30 to the printed circuit board 100 in a conventional manner . toothbrush sanitizing device 10 can be mounted to a wall by using mounting bracket 22 ( see fig1 ). mounting bracket 22 includes l - shaped body portion 130 , hook member 132 , a pair of stabilizing pegs 134 , positioning peg 136 , and curved stabilizing member 138 . body portion 130 has a pair of mounting holes 140 for receiving fasteners , such as screws , for mounting the bracket 22 to a wall or the like . when using mounting bracket 22 to mount toothbrush sanitizing device 10 to a wall , hook member 136 is received in first mounting bracket opening 40 while positioning peg 136 is received in second mounting opening 42 as shown in fig4 . stabilizing pegs 134 and curved stabilizing member 138 abut outer housing 12 to prevent toothbrush sanitizer unit 10 from moving relative to mounting bracket 22 . toothbrush sanitizing device is assembled as discussed above and used as follows . when a consumer has a toothbrush to be sanitized , the consumer lifts cover member 18 off of outer housing 14 and inserts the handle of the toothbrush into a recess 52 , with the bristles of the toothbrush facing light bulb 104 . the consumer then repositions cover member 18 on outer housing 14 . during this repositioning , cover member 18 may engage flanges 70 and flanges 70 may guide cover member 18 into the proper position on outer housing 14 . also , when cover member 18 is re - positioned on outer housing 14 , cover member 18 engages lever 126 , pivoting lever 126 clockwise ( as shown in fig8 ) around pivot pin 131 . this pivoting movement causes wire engaging portion 128 to push on leg 121 of contact wire 116 , rotating wire 116 counter - clockwise about end 118 since end 118 is affixed to microswitch 106 . this rotational movement causes leg 119 to push down on plunger 122 , activating microswitch 106 . the circuitry of circuit board 100 has a built - in time delay such that the actual activation of light assembly 16 is delayed for a short , predetermined period of time after microswitch 106 is actuated and remains actuated . this time delay prevents accidental actuation of ultra - violet light bulb 104 when cover member 18 is not in place and prevents actuation if cover member 18 is placed onto housing 14 but immediately removed . for example , light bulb 104 will not be turned on if lever 126 is accidentally bumped and temporarily rotated when cover member 18 is off of outer housing 12 . the circuitry of circuit board 100 is also designed to periodically actuate light bulb 104 ( for example , for approximately two minutes every 1 / 2 hour that microswitch 106 is continuously actuated ), to provide continual sanitization of the toothbrushes in device 10 . when ultra - violet light bulb 104 is actuated , light from bulb 104 will be transmitted through indicator panel 76 to its outer portion 90 to indicate that device 10 is sterilizing toothbrushes contained in device 10 . since lever 126 is biased to the &# 34 ; off &# 34 ; position as discussed above , lever 126 will move to the &# 34 ; off &# 34 ; position whenever cover member 18 is removed . thus , whenever cover member 18 is removed , microswitch 106 is deactivated and light bulb 104 is turned off . if excessively wet toothbrushes are inserted into device 10 , the excess water on the toothbrushes will drain out through drainage openings 66 or 80 . specifically , if the excess water drains down the handles of the toothbrushes or down recessed portions 52 , the water will drain out of device 10 through openings 66 . if the excess water drips off of the bristles of the toothbrush ( es ) into lamp cavity 74 , the water will run down wall portions 82 and 84 onto base ring portion 78 . the water will then drain through drainage holes 80 in lugs 114 onto the center portion of base 26 of outer housing 14 . since the center portion of base 26 is inner concave portion 29 , the water will be directed out drainage openings 30 , it being noted that there is space provided between feet 92 and the walls of openings 30 to permit this excess water to drain out of device 10 through that space . various modifications , improvements and other embodiments will become apparent to those skilled in the art once given this disclosure . such modifications , improvements and other embodiments are considered to be within the scope of this invention as defined by the following claims .
toothbrush sanitizing devices for home use . the devices include an outer housing , an inner housing , a cover and a sanitizing assembly . the inner housing is removably retained within the outer housing by an interference fit . the cover member is removably supported by the inner and / or outer housings such that the cover member and the outer housing form an enclosure , with the inner housing inside the enclosure . the inner housing has upwardly extending centering flanges for properly positioning the cover on the housings . the inner and outer housings form longitudinal slots to receive the handles of toothbrushes . the sanitizing assembly is attached to the inner housing and includes an ultra - violet lamp , an electronic printed circuit board , a microswitch and a switch member . the switch member is pivotably mounted in one of the centering flanges and is moved from the off to the on position when the cover is properly placed on the housings . the switch activates the microswitch which in turn activates the circuit board and lamp , such that the lamp is activated when the cover is positioned on the housings . however , the circuitry of the circuit board has a built - in time delay so that the ultra - violet lamp is not activated immediately after the switch member has been engaged , rather , the lamp is activated after the pre - determined time delay .