Exemplary arrangements relate to baby diaper changing stations. Exemplary arrangements further relate to baby diaper changing stations that provide improved stability and load bearing capability and that can be retracted to a more compact configuration when not in use.
Baby diaper changing stations are needed in public restrooms and other facilities. Some existing changing stations may be bulky and difficult to use. Because such units must be openly accessible, they may be subject to vandalism and breakage. Some existing changing stations may also be difficult to keep clean and sanitize.
Baby diaper changing stations may benefit from improvements.
Exemplary arrangements comprise a baby diaper changing station that includes a table and a pair of transversely spaced mounting brackets. The mounting brackets are affixed to a mounting surface such as a vertically extending wall. The table includes a substantially planar changing surface.
The table and the mounting brackets are movably connected through a pair of transversely disposed joints. A pair of side rails are in fixed operative engagement with a pair of transversely disposed side wall portions of the table. The side rails each include respective ends, each of which is part of a respective clevis of a respective joint. Each respective mounting bracket includes at least one projection that is in relatively rotatable engagement with a respective clevis through a respective pin.
The exemplary table is rotationally movable in supported connection with the mounting brackets between a use position and a stored position. In the use position the changing surface of the table extends substantially horizontally and outward in a direction perpendicular to the wall. In the use position the changing surface faces substantially upward. In the stored position the changing surface extends substantially vertically and parallel to the wall.
A respective stop on each respective clevis engages a stop surface on a respective mounting bracket and prevents the table from rotationally moving from the stored position beyond the use position. A respective torsion spring extends in surrounding relation of each respective pin and is in operative biasing engagement with the table and a respective mounting bracket. The torsion springs are configured so that when the table is in the use position it is subject to gravitational torque that is sufficient to maintain the table in the use position. In some arrangements a detent may be used to releasably hold the table in the use position. Manually moving the table away from the use position toward the stored position causes the spring torque applied by the torsion springs that acts to move the table toward the stored position, to exceed the counteracting gravitational torque. The spring torque is operative to rotationally move the table toward the stored position.
Numerous useful features of exemplary arrangements will be discussed in the following Detailed Description.
Referring now to the drawings and particularly to
In the use position of the changing station 10 as represented in
As shown in
The gap 52 is sized for accepting the bearing block 36 therein in relatively rotatably movable connection. The forward projecting portions 50 each include openings 54 and 56 therein as shown in
The exemplary base 16 further includes a removable cover 58. The cover 58 is configured to overlie a pair of storage compartments 60, 62 that extend in the central portion 44. The cover 58 is releasably secured by a lock 64 in the exemplary arrangement. Storage compartments 60 and 62 are connected to respective slots 66, 68 at the lower end thereof. As later discussed, disposable liners that can be placed on the changing surface 18 may be stored in the storage compartments 60, 62 and can be removed one at a time by users of the changing station through the slots 66, 68 when the cover 58 is in position.
In the exemplary arrangement the base 16 is comprised of molded plastic material similar to the table 14. Further the base is configured so that the table extends in outwardly overlying relation of the base 16 when the table is in the stored position. In the stored position of the exemplary arrangement, the central portion 44 of the base extends within the recess of the table that is bounded by the rim 26. This provides for the exemplary changing station to be compact and to extend only a relatively small distance from the wall 12 when in the stored position. Of course this construction is exemplary and in other arrangements other approaches may be used.
A base bracket 82 extends in side recess 74. A base bracket 84 which is a mirror image of base bracket 82 extends in side recess 76. Each base bracket is generally L-shaped in transverse cross-section which for purposes hereof means that the legs of the bracket extend substantially perpendicular to one another. Each bracket includes a back leg 86. The back leg extends substantially parallel to the wall 12 in the mounted position of the base 16. As used herein substantially or generally parallel will be deemed to mean parallel plus or minus 20°. Each back leg includes openings 88 that are in alignment with openings 48 through which the anchors extend. The back legs further include fastener accepting openings 90. The fastener accepting openings 90 are aligned with the openings 78 in the base. As shown in
Each exemplary base bracket further includes a forward leg 92. Each forward leg extends substantially perpendicular to the respective back leg of the base bracket. Each forward leg includes an ear 94. Each ear extends substantially normal to the wall in the operative position of the changing station. Each ear 94 includes an outwardly curved contour that includes an opening 96 therein. The opening 96 in each ear 94 is in aligned relation with a respective opening 56 in the forward projecting portion 50 of the base.
Each opening 96 is further configured to have a portion of the axle shaft extend therethrough. Each exemplary forward leg 92 includes a curved recess 157 that is bounded by a stop surface 98 thereon. In the exemplary arrangement the stop surface 98 is configured to engage a stop pin that is in operative connection with the table 14. The engagement of the stop pin and the stop surface 98 is operative to hold the table in the use position, and to prevent the table from rotating downward beyond the use position in a manner that is later discussed. Of course it should be understood that this configuration is exemplary and in other arrangements other approaches may be used.
The exemplary table 14 includes a pair of transversely disposed linearly straight channels 100, 102 therein. Each channel extends within the interior of the rim 26. Channel 100 extends transversely inwardly and substantially parallel to side wall surface 22, while channel 102 extends transversely inwardly and substantially parallel to side wall surface 20. Channel 100 extends from a channel opening 104 in the inner end surface 28 at one transverse side of the table 14. Channel 102 extends from a channel opening 106 at an opposed transverse side of the inner end surface.
Each channel opening is configured to receive a rail therein. Channel 100 receives a rail 108 while channel 102 receives a rail 110. In the exemplary arrangement the rails 108, 110 are mirror images of each other. As the rails are mirror images, only rail 108 will be described in detail. The details of each of rails 108 and 110 will be referred to using the same reference numerals except as otherwise noted.
As shown in
The exemplary rail 108 includes an elongated plate 118. The elongated plate 118 is configured to extend within the respective channel substantially perpendicular to the axis and substantially parallel to the outwardly overlying side wall. In the case of rail 108 the elongated plate extends in channel 100 substantially parallel to side wall surface 22. This is shown for example in
In the exemplary arrangement the respective channel in which the rail extends includes an internal step 124. As shown in
In the exemplary rail configuration the reduced portion 120 terminates inwardly within the respective channel at a turned inside end 128. The turned inside end 128 extends substantially perpendicular to the reduced area 120 of the elongated plate 118. The turned inside end 128 also extends substantially perpendicular to the side wall surface 22 that is in immediately adjacent relation with the channel 100. In the exemplary arrangement the channel 100 in which the respective rail 108 extends is bounded inwardly from the channel opening 104 within the rim by a channel end generally indicated 130 (see
The exemplary rail 108 is attached to an outboard end 132. The outboard end is attached to the respective rail end 112 by a bridge piece 134. This arrangement produces a clevis generally indicated 136. The outboard end 132 is disposed transversely outwardly from the rail end 112 and extends substantially parallel thereto. The outboard end 132 includes an opening 138 that is axially aligned with shaft opening 114 in the rail end and is configured for receiving an outboard portion of the axle shaft therethrough. The outboard end 132 further includes a stop pin opening 140 therethrough. The stop pin opening 140 is aligned with stop pin opening 116 in the rail end. In the exemplary arrangement in the operative position of the changing table, each outboard end 132 outwardly overlies the immediately adjacent side wall surface of the table 14. In the case of rail 108, the outboard end 132 transversely overlies side wall surface 22. In the exemplary arrangement each side wall surface includes a recess 142 in which the outboard end 132 extends. In the exemplary arrangement side wall surface 20 also includes a similar recess 142 which receives the outboard end 132 of rail 110.
The inboard end 28 of the table 14 includes on each respective transverse side a recessed notch 144. Each notch 144 extends substantially parallel to the axis 148 and transversely between the immediately adjacent channel opening 104 or 106 and the immediately adjacent side wall surface 22 or 20. Each recessed notch 144 is configured to receive therein in nested relation a respective bridge piece 134 which also extends substantially parallel to the axis. This configuration of the exemplary arrangement further helps to assure that the rails 108 and 110 and the outboard ends 132 are in operatively fixed engagement with the table. As represented in
As represented in
In the exemplary arrangement stop pins 154 extend through each clevis 136 and are radially disposed from and substantially parallel to the axis 148. The stop pins operate to limit the rotational movement of the table relative to the base to the use position at which the table extends substantially normal to the base and the wall. In the exemplary arrangement the stop pins are configured to deform in the event that an excessive vertical load is applied to the table beyond what should reasonably be supported thereon. Normally such an excessive load is associated with attempted vandalism of the changing station. In exemplary arrangements the stop pins deform and are frangible so as to break when an excessive load is encountered. The exemplary arrangement is configured so that if the stop pins are fractured, other components of the unit remain intact. The stop pins can then be readily replaced and the baby diaper changing station returned to service.
In the exemplary arrangement as represented for example in
As represented in
In the event that vandalism or other anomalous conditions are encountered which result in the table 14 having applied thereto an excessive downward force above a limit, that acts to move the table in the direction of Arrow A beyond the use position, the stop pins 154 will deform longitudinally intermediate of the stop surfaces 98 and the devises 136. In the exemplary arrangement the stop pins 154 are configured to be frangible so that deformation causes the pins to separated at the recess 164. Once the stop pins have fractured and separated at the recesses, the table may rotate in the direction of Arrow A beyond the use position without causing damage to other components of the changing station. As a result the exemplary arrangement may be returned to service by replacing the stop pins 154 and the retaining clips 166. Of course it should be understood that this arrangement is exemplary and other arrangements other approaches may be used.
In the exemplary arrangement a spring assembly generally indicated 168 is operative to assist a user in moving the table from the use position to the stored position. In the exemplary arrangement the spring assembly 168 is positioned in the central recess 72 on the back of the base 16. The spring assembly acts between the base and the table so that when the table is moved toward the stored position the spring assembly will assist in such movement by biasing the table toward the stored position and then maintain the table in the stored position. When it is desired to move the table from the stored position to the use position, the table can be rotated about the axis 146 into the use position. As shown in
The pin 180 extends outward from a plate 182. The plate 182 is a substantially planar, flat plate that is configured to be attached in overlying relation with a land 184 on the backside of the base in the recess 72 (see
The end portion 176 that is attached to the rod is configured to extend between a pair of disposed ears 190. Each of the ears 190 include an opening 192 therethrough. Each of the openings 192 is sized for receiving a pin 194 therein. A spring retainer 196 is configured to releasably extend through a hole in the pin 194. As a result the pin 194 is enabled to hold the end portion 176 of the rod 174 in engagement with the ears 190.
The ears are attached to a generally C-shaped bracket 198. The bracket includes a disposed pair of end portions 200. Each end portion includes an opening 202 therethrough. The openings 202 are sized to enable the axle shaft 146 to extend therethrough. The bracket 198 further includes a middle portion 204 which extends between the end portions. The middle portion 204 includes a plurality of fastener accepting openings 206 therethrough.
In the exemplary arrangement the bracket 198 is attached to the bearing block 36 of the table. The middle portion 204 of the bracket is fastened to the bearing block through fasteners that extend through the openings 206. The axle shaft 146 extends through the openings 202 in the end portions 200 on each side of the bearing block 36. The end portion 176 which is attached to the distal end of the rod 174 of the air spring is operatively engaged with the ears 190 of the bracket.
Thus as can be appreciated from
In some exemplary arrangements the strap assembly 30 includes a flexible retaining strap 208 that is attached to the table 14 and extends substantially across the changing surface 18. In an exemplary arrangement the retaining strap 208 extends in a direction generally perpendicular to the wall 12 when the table 14 is in the use position. At an outer end 210 that is disposed furthest away from the wall, an anchor piece 212 is attached by a fastener 214 to the table via an opening in the table. A threaded insert 216 extends in the opening to further secure the fastener 214 and anchor piece 212 to the table.
Anchor piece 212 further includes a loop 218. The loop 218 engages a ring shaped connector 220. The ring shaped connector 220 is attached to the flexible strap 208. At an inner end 222, the strap 208 is attached to a buckle 224. The buckle enables selectively adjusting the length of the strap to suit the requirements of the user. The exemplary buckle 224 includes biased clip projections 226 that are releasably engageable in an end piece 228. The exemplary end piece 228 includes openings 230 that enable accessing the clip projections 226 to manually release the buckle from the end piece when desired. The exemplary end piece 228 is attached to an anchor piece 232. The anchor piece 232 is held to the table by a fastener 234 that extends in an opening in the table. A threaded insert 236 extends in the opening so as to further secure the anchor piece 232 to the table.
Thus the exemplary arrangement enables a user of a changing station to adjust the length of the flexible strap 208 to accommodate the size of the child, and to then secure the child in position on the changing surface by engagement of the buckle 224 with the end piece 228. To release the strap assembly 30 the user need only manually engage the clip projections 226 through the openings 230, to release the buckle and the end piece. The exemplary arrangement provides a secure connection that can be readily engaged and disengaged by users of the changing station. Of course these structures and approaches are exemplary and in other arrangements other approaches may be used.
As shown in
In exemplary arrangements the baby diaper changing station is readily securely mounted to the wall 12 or other vertically extending supporting surface. This is accomplished in exemplary arrangements as described in connection with
In the exemplary arrangement the back wall bracket side 246 includes a plurality of spaced openings 252. In the exemplary arrangement the spaced openings are configured for receiving fasteners therethrough such as screws. The openings are configured to enable the bracket 244 to be attached to at least one stud 254 which underlies the surface of wall 12. As represented in
In the exemplary arrangement the changing station 10 is initially mounted by the engagement of the front wall bracket side 248 and the lip 250 with the downward extending edge 80 on the back side of the base 16. As previously discussed in connection with
Thus in exemplary arrangements the mounting bracket 244 may be attached by fasteners 256 to the wall 12 in a horizontally level configuration such as is shown in
The exemplary changing station 260 includes a pair of joints 276, 278. As later described in detail, each joint enables the table 264 to be rotatably movable in operative supported connection with the mounting brackets 266, 268. The exemplary joints 276, 278 enable the table to be manually movable between a use position shown in
In the exemplary arrangement the table includes a substantially planar changing surface 280. As shown in
The exemplary table 264 includes an outer end wall portion 286. The outer end wall portion includes one or more wall surfaces that bound the table along a side of the table that extends the furthest away from the supporting wall 262 when the table is in the use position. The table further includes an inner end wall portion 288. Inner end wall portion 288 includes one or more wall surfaces that bound the table along a side that extends closer to the wall than the outer end wall portion 286 when the table is in the use position. The exemplary inner end wall portion and the rim 282 include a pair of transversely disposed notches 287, 289. In the exemplary arrangement the joint 276 extends in notch 287 and the joint 278 extends in notch 289.
The exemplary table further includes a pair of transversely disposed side wall portions 290, 292. The exemplary side wall portions include one or more wall surfaces that bound the table on the respective lateral side. Each side wall portion extends intermediate of the inner end wall portion and the outer end wall portion. In the exemplary arrangement respective pegs 294 that are surrounded within the rim by recesses 296 are positioned at the respective corners at which the side wall portions 290, 292 are engaged with the outer end wall portion 286. As shown in
In the exemplary arrangement when the table 264 is in the use position as shown in
As the mounting brackets and joints of the exemplary arrangement are mirror images of one another only the structures associated with mounting bracket 266 and joint 276 are described herein in detail.
In the exemplary arrangement the front facing surface 270 of the bracket 266 is bounded on the outboard side by an outboard flange 300. The exemplary outboard flange 300 extends forward of and substantially perpendicular to the front facing surface 270. An inboard flange 302 extends at an opposed transverse side of the surface 270. The inboard flange 302 also extends forward of and substantially perpendicular to the surface 270. In the exemplary arrangement the inboard flange 300 and the outboard flange 302 bound a pocket 304 therebetween. As shown in
In the exemplary arrangement the outboard flange 300 extends further outward away from the wall than the inboard flange 302. This enables the outboard flange to transversely overlie the side wall portion 290 of the table and the structures attached thereto when the table is in the stored position. Thus the exemplary outboard flange 300 provides protection against side impacts when the table is in the stored position. Of course it should be understood that this configuration is exemplary and in other arrangements other approaches and configurations may be used.
The exemplary bracket 266 further includes at least one forward facing projection generally indicated 306. In the exemplary arrangement the at least one projection 306 includes a pair of transversely disposed parallel extending ears 308, 310. In the exemplary arrangement the ears 308, 310 are integrally formed with the outboard flange 300 and the inboard flange 302 respectively. Each of the ears 308, 310 include respective openings 312, 314 therein. Openings 312, 314 are in aligned relation along an axis 316. The axis 316 through openings 312, 314 is a common axis with the corresponding openings in similar ears of mounting bracket 268. In the exemplary arrangement the table 264 is rotatable about this common axis. Of course it should be understood that this approach is exemplary and in other arrangements other approaches may be used.
A side rail 318 is in attached connection with side wall portion 290. In the exemplary arrangement a side rail 320 which is the mirror image of side rail 318, is in attached engagement with side wall portion 292. Side rail 318 includes a plurality of longitudinally spaced openings 322 therein. Openings 322 are configured to accept fasteners 324. Each of the fasteners 324 extend through a respective opening 322 and hold the side rail in fixed attached engagement with the immediately adjacent side wall portion 290 of the table 264. In the exemplary arrangement the side wall portions of the table, including the side wall portion 290, include bosses 326 in the interior area thereof that are configured to engage the threads of fasteners 324. This enables the side rails 318, 320 to be held in fixed attached engagement with the respective immediately adjacent side wall portion. Of course this approach is exemplary and in other arrangements other approaches may be used.
The exemplary joint 276 further includes a clevis 328. The exemplary clevis includes a side rail end 330. The side rail end 330 in the exemplary arrangement includes the longitudinal end of side rail 318 immediately adjacent to mounting bracket 266. The side rail end has a curved contour. The exemplary clevis 328 further includes an inboard end 332. The exemplary inboard end is similarly shaped to the side rail end 330. The inboard end 332 is axially spaced from the side rail end 330 in the inboard direction therefrom. The exemplary clevis further includes a clevis bridge 334. The exemplary clevis bridge extends transversely between the side rail end 330 and the inboard end 332, and is in fixed operative connection with both the side rail end and the inboard end. In the operative position of the joint 276 the clevis bridge 334 extends parallel to the axis 316.
In the exemplary arrangement the side rail end 330 includes an opening 336. The inboard end 332 includes an opening 338. In the exemplary arrangement when the clevis 328 is in the operative position in the joint 276, the openings 336, 338 are aligned with the axis 316. A pin 340 extends along the axis 316 and through openings 312, 314, 336 and 338. In the exemplary arrangement the pin 340 holds the mounting bracket 266 and the table 264 in rotatable operatively engaged relation so that the table is rotatably movable about the axis between the use and stored positions. Of course it should be understood that this approach is exemplary and in other arrangements other approaches may be used.
In the exemplary arrangement the rotation of the table 264 relative to the mounting brackets 266, 268 is limited so that the table cannot be rotated from the stored position in a first rotational direction toward the use position, beyond the use position. This is achieved in the exemplary arrangement by a stop 342. The exemplary stop 342 includes respective surfaces that bound the clevis bridge 334 and the lower inward portions of the side rail end 330 and the inboard end 332. In the exemplary arrangement when the table is moved in the first rotational direction to the use position, the surfaces which comprise the stop 342 engage a stop surface 344 of the mounting bracket. In the exemplary arrangement the stop surface 344 includes a portion of front facing surface 270 that is disposed between the ears 308, 310.
As can be appreciated from
At least one torsion spring operates to apply a biasing force operatively between the table and at least one mounting bracket. In the exemplary arrangement each of the joints has a respective torsion spring associated therewith. Each of the torsion springs is operative to apply a spring force operatively between the respective mounting bracket and the adjacent area of the table so as to apply a biasing spring torque that biases the table in a second rotational direction that is opposed of the first rotational direction. The spring torque is operative to bias the table toward the closed position to facilitate the ability of a user to place the table in the closed position after use.
An exemplary torsion spring 346 is associated with joint 276. Exemplary torsion spring 346 includes a cylindrical coil 348. Coil 348 comprises a plurality of spring coil turns which extend about a cylindrical opening 350. In the operative position of the spring 346 the cylindrical opening 350 is aligned with the axis 316. The exemplary torsion spring includes an elongated table spring leg 352. The exemplary table spring leg 352 extends generally perpendicular of the axis 316 and terminates forwardly at a turned end 354. The exemplary table spring leg 352 is round in transverse cross-section as shown in
The exemplary torsion spring 346 further includes a back spring leg 358. The exemplary back spring leg 358 extends at an opposed axial end and in an opposed direction from the coil 348 than table spring leg 352. Back spring leg 358 is in operatively engaged relation with the front facing surface 270 of mounting bracket 266. In the exemplary arrangement the back spring leg 358 engages front facing surface 270 in the area transversely between ears 308 and 310 and intermediate of the area of surface 270 that serves as the stop surface 344. Of course it should be understood that this arrangement is exemplary and other arrangements other approaches may be used.
In the exemplary arrangement a cylindrical bushing 360 extends in the cylindrical opening 350 of coil 348 of the torsion spring. The bushing extends axially intermediate of side rail end 330 and inboard end 332. Bushing 360 includes an opening 362 that extends axially therethrough. Opening 362 is sized to accept the cylindrical body of pin 340 therein. Bushing 360 includes a cylindrical outer surface 364. In the operative position of the bushing 360, the pin 340 extending through the opening 362 holds the bushing and the cylindrical outer surface 364 thereof in axially aligned relation with the axis 316.
In the exemplary arrangement the exemplary cylindrical outer surface 364 of the bushing 360 is sized so as to be in close adjacent relation and/or in abutting relation with the inside surfaces of torsion spring coil 348 in the cylindrical opening 350. As can be appreciated, in the exemplary arrangement because the spring torque is applied to urge the table 264 to move toward the stored position, the spring torque is at its highest level when the table is in the use position. When the spring is exerting the greatest spring torque, the legs of the spring which extend from axially disposed opposite ends of the coil, exert a twisting force which is generally normal to the axis 316. In this condition the spring coils are in abutting engagement with the cylindrical outer surface so that the bushing holds the spring in generally axially aligned relation. By generally axially aligned relation it is meant that the axis of the coil of the torsion spring is within 20° of the axial direction. Of course this approach is exemplary and in other arrangements other approaches may be used.
In the exemplary joint 276 an outboard washer 366 is positioned axially intermediate of ear 308 and the outboard face of side rail end 330. An inboard washer 368 extends axially intermediate of inboard end 332 and ear 310. Washers 366 and 368 each include a central opening through which pin 340 extends in the operative position of the joint. In the exemplary arrangement outboard washer 366 maintains a first axial space between side rail end 330 and ear 308. Inboard washer 368 maintains a second axial space between inboard end 332 and ear 310. The washers maintain the clevis 328 in centered relation between the ears of the mounting bracket throughout the range of movement of the table between the use position and the stored position.
The exemplary joint further includes a cover 370. The exemplary cover includes a curved outer cover surface 372 that extends in outwardly overlying relation of torsion spring 346. The exemplary cover 370 includes a pair of radially extending, axially disposed cover side walls 374, 376. In the operative position of the cover 370 the cover side wall 374 extends in engagement with the inboard face of side rail end 330. Likewise cover side wall 376 extends in engagement with the outboard face of the inboard end 332.
In the exemplary arrangement the cover 370 includes at least one releasable cover detent 378. In the exemplary arrangement the cover detents comprise openings 380 that extend in each of the side rail end 330 and the inboard end 332. The cover detents further include projections 382. The openings 380 releasably engage the projections 382. The projections 382 extend outward on each of the cover sidewalls 374 and 376. This exemplary configuration enables the cover to be securely held in place by the detents 378, but to be removable by authorized persons when desired. Of course it should be understood that this approach is exemplary and in other arrangements other approaches may be used.
In the exemplary arrangement the table 264 includes a pair of respective spring channels 384 therein. Each spring channel extends generally perpendicular to the axis 316 and forwardly within the interior area of the table adjacent to each of side wall portions 290 and 292. Each spring channel extends inwardly in the interior area of the table from a respective spring channel opening that is within a respective notch of the inner end wall portion. Each respective spring channel is configured to receive therein a respective table spring leg of a respective torsion spring and to extend in surrounding relation thereof. Each respective torsion spring leg operates to apply the spring torque to the table which operates to bias the table in the second rotational direction toward the closed position.
As shown in
In the exemplary arrangement when the table is in the use position, the upper surface 356 of the table spring leg 352 which comprises a continuous planar surface portion that extends on the upper side of the leg, is in continuous abutting engagement with the spring leg engaging surface which bounds the upper surface of spring channel 384. In this exemplary arrangement the planar spring engaging surface of the spring channel extends coplanar and in continuous abutting engagement along the entire length of the upper surface of the table spring leg. This exemplary configuration operates to spread the force of the spring torque acting on the table along substantially the entire length of the table spring leg and the spring leg engaging surface. In this exemplary arrangement the uniform application of the force spread across both abutting engaged surfaces avoids areas of substantially higher force that might otherwise cause excess wear or deformation of the spring leg engaging surface. Of course it should be understood that this configuration which is used in the example arrangement, is but one approach that may be taken to assuring that the application of torsional force by the springs is accomplished in a manner that does not cause wear, deformation or damage to the area in which the force is applied. In other exemplary arrangements different numbers, types and configurations of torsion springs and/or torsion spring legs and spring leg engaging surfaces may be employed, as well as different types of materials and material properties to achieve reliable operation over a suitable number of cycles during the useful life of the changing station.
In an exemplary arrangement each of the side rails 318, 320 of the changing station provide suitable strength to support the table portion 264 in engaged relation with the wall 262 through the mounting brackets 266, 270. The exemplary configurations of the side rails that are in fixed attached engagement with the respective side wall portions of the table 264, provide resistance to deformation and separation when subject to downward force in excess of that which would be normally expected when the table is in the use position.
As shown in
In the exemplary arrangement a side bridge portion 400 of the surface of side wall portion 290 extends transversely between slots 396 and 398. Side bridge portion 400 is engaged with the central portion 390 of side rail 318. Side bridge portion 400 extends in abutting underlying relation with central portion 390. Further in the exemplary arrangement the central portion 390 is held in fixed engagement with the side bridge portion 400 through the fasteners 324 which extend through side rail 318 and the side bridge portion and into the bosses 326 on the inside of the side wall portion 290.
In this exemplary arrangement the application of downward force on the table 264 when the table is in the use position is spread across the pair of side rails 318 and 320. The inturned flanges of the respective side rails engaged in the respective slots, spread the force that is applied across the length of the slots which extend from the respective notches at the inner end wall portion of the table to the outward end of the side rails. The exemplary inturned flange configuration further provides compressive engagement between the slots and the flanges which further helps to maintain the side rails and the table in engagement despite the application of excessive force. The U-shaped cross-section of the exemplary side rails further helps to avoid deformation of the side rails and the side wall portions of the table under excessive loading conditions. Of course these configurations are exemplary and in other arrangements the approaches, principles, structures and arrangements that have been described herein, as well as other structures and arrangements may be employed to provide resistance to unusually high load conditions.
In some alternative exemplary arrangements a detent may be provided to releasably hold the table in the use position. A detent may be provided in exemplary arrangements to avoid a limited upward force acting on the table from advertently causing the table to move to the closed position when such movement is not desired. The detent operates to maintain the table in the use position until a deliberate force is applied to move the table toward the stored position which will release the detent and enable the table to move in response to the spring torque toward the closed position.
In an exemplary arrangement the detent is associated with the joint on each lateral side of the changing station. As represented in
As represented in
Of course it should be understood that this configuration of the detent 402 is exemplary and in other arrangements other approaches may be used. For example, while in the exemplary arrangement the detent is in operative fixed connection with the side rail and the projection engages a recess in the bracket, this arrangement may be reversed. For example the spring loaded projection may be in fixed operative attachment with the mounting bracket and may engage a recess or similar structure that is in fixed operative connection with the side rail. In some arrangements the detent may be a ball type detent. In some arrangements a detent may be included in only one of the joints rather than in both joints. In other exemplary arrangements the detent may be associated with other components of the joint or other structures that are included in the table or the mounting bracket. Further in other exemplary arrangements other types of detents may be utilized.
These may include for example, detents that include leaf springs or other biasing structures that can releasably hold structures in relative positions and then release the structures to move responsive to releasing movement or force. Further other exemplary detents may engage projections rather than recesses or other comparable engaging structures that can hold the structures in relative positions, and then release the structures to enable movement. Further in other exemplary arrangements multiple detents may be utilized in connection with the exemplary structures. This may include multiple detents that hold the table in the use position. Alternatively or in addition detents may be utilized to hold the table in each of the stored and use positions. For example as can be appreciated, a further recess may be included in ear structure 310 in which the spring loaded projection can be engaged when the table is in the stored position. Of course it should be understood that these approaches are exemplary and in other arrangements other structures and approaches may be used.
In operation of the exemplary changing station 260 the pair of transversely disposed torsion springs operate to apply a spring torque to the table 264. The spring torque which is applied through the table spring legs of the torsion springs acting within the spring channels, biases the table to rotate about the axis 216 in the second rotational direction toward the closed position. In the exemplary arrangement the table 264 includes sufficient mass that is sufficiently in proximity to the outer end wall portion so that the center of gravity of the table is sufficiently disposed from the axis, that gravity acting on the table produces a gravitational torque when the table is in the use position. This gravitational torque acts to bias the table about the axis 216 in the first rotational direction which is opposite to the direction in which the table is biased by the spring torque. In an exemplary arrangement with the table in the use position, the gravitational torque is of a magnitude that is sufficiently greater than the spring torque so that the table remains in the use position when no forces other than gravity and the spring torque act on the table. As a result in the exemplary arrangement when the user rotationally moves the table in the first rotational direction from the stored position to the use position, the table will stay in the use position so that the table can be used to securely support the baby regardless of the location in which the baby is placed on the table. Alternatively in arrangements that include a detent such as a detent associated with at least one joint, the detent may further help to hold the table in the use position until the user deliberately moves the table from the use position toward the stored position.
The exemplary arrangement is configured such that once the changing station no longer needs to be used, the user may manually engage and rotate the table toward the stored position. Once the table is rotationally disposed away from the use position in the second rotational direction, the spring torque becomes greater than the gravitational torque acting on the table. This occurs because the distance between the center of gravity of the table and the axis decreases as the table is moved toward the stored position, which in turn reduces the gravitational torque. As a result the spring torque exceeds the gravitational torque acting on the table and causes the table to automatically move toward the stored position. In exemplary arrangements the magnitude of the spring torque and the configuration of the joints are arranged so that the maximum rotational velocity in the second rotational direction as a result of the spring torque avoids high impact stopping forces or other undesirable conditions. Further the configuration of the exemplary rim 282 which engages the front facing surfaces 370 within the pockets of the respective mounting brackets spreads the force that results from the application of the spring torque as it moves the table to the stored position. Further in some exemplary arrangements a detent may be used to releasably hold the table in the stored position. Of course it should be understood that these approaches are exemplary and in other arrangements other approaches may be used.
Thus the exemplary arrangements of the baby diaper changing station described herein achieve improved operation, eliminate difficulties encountered in the use of prior devices and systems, and attain the useful results described herein.
Further it should be understood that the features and/or relationships associated with one of the exemplary arrangements described may be combined with features and/or relationships from another exemplary arrangement. That is, various features and/or relationships from various arrangements can be combined to produce further arrangements. The inventive scope of this disclosure is not limited only to the exact arrangements that have been shown and/or described herein.
In the foregoing description certain terms have been used for brevity, clarity and understanding. However, no unnecessary limitations are to be implied therefrom because such terms are used for descriptive purposes and are intended to be broadly construed. Moreover, the descriptions and illustrations herein are by way of examples and the new and useful features are not limited to the exact features shown and described.
Having described the features, discoveries and principles of the exemplary arrangements, the manner in which they are constructed and operated, and the advantages and useful results attained, the new and useful structures, devices, elements, arrangements, parts, combinations, systems, equipment, operations, methods, processes and relationships are set forth in the appended claims.
Number | Name | Date | Kind |
---|---|---|---|
20110283455 | Grainger | Nov 2011 | A1 |
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