Bayonet-coupled draft shield arrangement for balance
View Patent ↗A balance ( 1 ) has a balance housing ( 2 ), which, when the balance is set up for operation, has an opening at its topside to pass a load-introducing member ( 4 ). The housing has a draft shield arrangement ( 5 ), separable from, and attachable to, the housing. An opening ( 7 ) on a floor ( 6 ) of the draft shield arrangement corresponds to the housing opening and allows the load-introducing member to pass. A design that facilitates cleaning while keeping the height of the balance low is achieved with a fastening arrangement ( 8 ) for the draft shield arrangement. The fastening arrangement allows the draft shield arrangement to be fastened centrally at the load-introducing member passage. A rim on the housing opening operates as a first part ( 8 ′) and provides a form-locking connection with a second part that is attached to the draft shield arrangement at the draft shield floor opening.
1. A balance, having functional elements including a load-introducing member, the balance comprising:
a housing that accommodates the functional elements, with an opening through which the load-introducing member passes, the opening located on a top side of the housing when the balance is set up for operation;
a draft shield arrangement, a floor of which has an opening through which the load introducing member passes, the opening corresponding to the housing opening when the housing and draft shield arrangement are operatively engaged; and
an arrangement for fastening the draft shield arrangement to, and separating the draft shield arrangement from, the housing at the respective openings, the arrangement comprising:
a rim of the housing opening, which serves as a first part of the fastening arrangement; and
a second part of the fastening arrangement, arranged at the draft shield arrangement opening;
the first and second parts cooperating as a bayonet coupling.
2. The balance of claim 1 , wherein:
the second part is releasably connected to the floor of the draft shield arrangement.
3. The balance of claim 2 , wherein:
the second part has a ring-shaped configuration that cooperates as the bayonet coupling with the draft shield arrangement opening.
4. The balance of claim 3 , wherein:
the second part has outward-pointing first projections;
the opening of the draft shield arrangement has cutouts; and
the second part is connected to the draft shield arrangement floor by inserting the first projections into the opening and turning the second part.
5. The balance of claim 3 , wherein:
an additional force-locking engagement secures a firm hold of the second part in the floor.
6. The balance of claim 1 , further comprising:
a channel on a top side of the second part, for catching and draining away liquids.
7. The balance of claim 1 , wherein:
the second part has second projections;
the opening of the draft shield arrangement has cutouts; and
the second part and the draft shield arrangement are fastened by inserting the second projections into the cutouts and turning the second part in the opening.
8. The balance of claim 7 , further comprising:
a rotation-delimiting element on the second part, which serves as a stop.
9. The balance of claim 8 , further comprising:
a tightening ramp at the second projection provides an additional force-locking engagement.
10. The balance of claim 9 , wherein:
the force for overcoming the engagement of the respective first and second parts is less than the force for overcoming the engagement of the second part in the draft shield arrangement floor.
11. The balance of claim 1 , wherein:
the floor of the draft shield arrangement comprises a material with sufficient elasticity such that impact forces which are sustained by the draft shield arrangement are transmitted to the balance only with damped intensity.
12. The balance of claim 1 , further comprising:
a metallic plate, set in the draft shield arrangement floor, providing an electrical ground connection to the draft shield arrangement.
13. The balance of claim 4 , wherein:
an additional force-locking engagement secures a firm hold of the second part in the floor.
14. The balance of claim 7 , further comprising:
a tightening ramp at the second projection provides an additional force-locking engagement.