Weighing scale having dual housings
View Patent ↗An electronic weighing scale that includes an inner housing and an outer housing surrounding the inner housing. In one embodiment, the inner and outer housings are not secured to one another and are spaced apart by shock-absorbing spacers designed to absorb shock of impact loads such as may be caused by the scale being dropped. The inner housing includes a chassis defining a load cell cavity that contains a load cell. The inner housing also includes an electronics compartment closure that together with the chassis define an electronics compartment that contains electronics of the scale, including display electronics and user-controls electronics. In one embodiment, the electronics compartment is hermetically sealed to protect the electronics from moisture.
1. A scale, comprising:
a weighing mechanism for determining a weight of a mass applied to the weighing scale;
a display in operative communication with said weighing mechanism for displaying said weight to a user;
a chassis supporting each of said weighing mechanism and said display, said chassis having an upper side and a lateral periphery;
an outer housing secured substantially enclosing said upper side and said lateral periphery of said chassis, said outer housing having lateral sides each spaced from said lateral periphery of said chassis; and
a plurality of spacers each extending between said lateral periphery of said chassis and a corresponding one of said lateral sides of said housing; each of said plurality of spacers secured to one of 1) said chassis and 2) said housing;
wherein at least some of said plurality of spacers are sacrificial spacers designed to be sacrificed in response to predetermined impact loads.
2. The scale of claim 1 , wherein said chassis is made of plastic and each of said plurality of spacers is integrally molded with said chassis.
3. The scale of claim 1 , wherein said outer housing defines a cavity that is at least substantially entirely surrounded by said outer housing, said chassis contained within said cavity.
4. The scale of claim 3 , wherein said chassis is unfastened within said cavity during normal use of the scale.
5. The scale of claim 1 , wherein said chassis defines a user-interface-electronics compartment and a load-cell cavity spaced from said user-interface-electronics compartment, the scale further comprising:
a load cell contained in said load-cell cavity; and
user-interface electronics in electrical communication with said load cell and contained in said user-interface-electronics compartment;
wherein said housing surrounds said chassis so as to enclose therein said user-interface-electronics compartment and said load-cell cavity.
6. The electronic scale of claim 5 , further comprising a first removable closure sealing said user-interface-electronics compartment, said first removable closure being contained within said housing.
7. The electronic scale of claim 5 , wherein said user-interface-electronics compartment and said load-cell compartment are formed on opposite sides of said chassis.
8. The electronic scale of claim 5 , wherein said chassis has an upper side and a lower side opposite said upper side, said user-interface-electronics compartment being formed in said lower side, said upper side of said chassis including at least one aperture providing visual access to said user-interface electronics.
9. The electronic scale of claim 5 , wherein said housing includes a scaled window region in registration with said at least one aperture so as to provide visual access to said user-interface electronics.
10. The electronic scale of claim 5 , wherein said chassis and said housing together define a battery compartment for receiving at least one battery.
11. A scale, comprising:
a weighing mechanism for determining a weight of a mass applied to the weighing scale;
a display in operative communication with said weighing mechanism for displaying said weight to a user;
a chassis supporting each of said weighing mechanism and said display, said chassis having an upper side and a lateral periphery;
an outer housing secured substantially enclosing said upper side and said lateral periphery of said chassis, said outer housing having lateral sides each spaced from said lateral periphery of said chassis; and
a plurality of spacers each extending between said lateral periphery of said chassis and a corresponding one of said lateral sides of said housing; each of said plurality of spacers secured to one of 1) said chassis and 2) said housing;
wherein said chassis defines a user-interface-electronics compartment and a load-cell cavity spaced from said user-interface-electronics compartment, the scale further comprising:
a load cell contained in said load-cell cavity; and
user-interface electronics in electrical communication with said load cell and contained in said user-interface-electronics compartment;
wherein said housing surrounds said chassis so as to enclose therein said user-interface-electronics compartment and said load-cell cavity.
12. The scale of claim 11 , wherein said chassis is made of plastic and each of said plurality of spacers is integrally molded with said chassis.
13. The scale of claim 11 , wherein at least some of said plurality of spacers are sacrificial spacers designed to be sacrificed in response to predetermined impact loads.
14. The scale of claim 11 , wherein said outer housing defines a cavity that is at least substantially entirely surrounded by said outer housing, said chassis contained within said cavity.
15. The scale of claim 14 , wherein said chassis is unfastened within said cavity during normal use of the scale.
16. The electronic scale of claim 11 , further comprising a first removable closure sealing said user-interface-electronics compartment, said first removable closure being contained within said housing.
17. The electronic scale of claim 11 , wherein said user-interface-electronics compartment and said load-cell compartment are formed on opposite sides of said chassis.
18. The electronic scale of claim 11 , wherein said chassis has an upper side and a lower side opposite said upper side, said user-interface-electronics compartment being formed in said lower side, said upper side of said chassis including at least one aperture providing visual access to said user-interface electronics.
19. The electronic scale of claim 11 , wherein said housing includes a sealed window region in registration with said at least one aperture so as to provide visual access to said user-interface electronics.
20. The electronic scale of claim 11 , wherein said chassis and said housing together define a battery compartment for receiving at least one battery.