Wiper blade for a windscreen wiper

• US 9,233,664 B2
• Filed: 02/25/2011
• Issued: 01/12/2016
• Est. Priority Date: 04/22/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Weidlich, Jochen
• Primary Examiner(s): Graham, Gary
• Application Number:
  US13/642,667
• Publication Number:
  US 20130091650A1
• Time in Patent Office: 1,782 Days
• US Class Current: 1/1
• CPC Class Codes: B60S 1/38 Wiper blades provided with liquid spreading means B60S1/524; provided with gas spreading means B60S1/546
• CPC Class Codes: B60S 1/3855 by welding, gluing or the like
• CPC Class Codes: B60S 1/386 made in two halves
• CPC Class Codes: B60S 1/3874 with a reinforcing vertebra
• CPC Class Codes: B60S 1/40 Connections between blades and arms
• CPC Class Codes: B60S 2001/382 the backing strip being an essentially planar reinforcing strip, e.g. vertebra

Abstract

The invention relates to a wiper blade for a windscreen wiper, comprising a wiper strip on which at least one support rail (312, 314) is disposed, wherein said support rail has a spring element (412, 415) provided with a plastic sheath (313, 315), and further comprising a base connection device (160), which includes plastic and is welded to plastic sheath (313, 315), wherein a flat weld seam (419, 421) is formed between the base connection device (160) and the at least one support rail (312, 314).

Claims

1. A wiper blade (100) for a windscreen wiper, comprising a wiper strip (112), on which at least one loadbearing rail (312, 314) is arranged, the loadbearing rail having a spring element (412, 415) which is provided with a plastic covering (313, 315), a base connection device (160) which has plastic and is welded to the plastic covering (313, 315), and a flat welded seam (419, 421) between the base connection device (160) and the at least one loadbearing rail (312, 314), wherein the base connection device (160) includes a basic body (290) that has at least one through-passage opening (222, 242) configured to guide a welding tool (293, 295) through the basic body (290) at least as far as the at least one loadbearing rail (312, 314), and wherein an adapter unit (150) is welded to the base connection device, the adapter unit (150) having at least one projection (422, 442) which engages into the at least one through-passage opening (222, 242).

2. The wiper blade as claimed in claim 1, characterized in that the flat welded seam (419, 421) extends over a longitudinal extent (399) of the base connection device (160).

3. The wiper blade as claimed in claim 2, characterized in that the at least one loadbearing rail (312, 314) is formed with broad sides (461, 463, 471, 473) and narrow sides (462, 464, 472, 474), the flat welded seam (419, 421) being formed on one of the broad sides (461, 463, 471, 473).

4. The wiper blade as claimed in claim 3, characterized in that the basic body (290) includes lateral holding members (220, 240) which engage as claws at least in sections around the at least one loadbearing rail (312, 314).

5. The wiper blade as claimed in claim 4, characterized in that the flat welded seam (419, 421) is formed between a broad side (463, 473), facing away from the basic body (290), of the at least one loadbearing rail (312, 314) and a connecting section (226, 246), facing the loadbearing rail (312, 314), of the lateral holding member (220, 240).

6. The wiper blade as claimed in claim 5, characterized in that the at least one through-passage opening (222, 242) is configured to guide the welding tool (293, 295) through the basic body (290) as far as the at least one loadbearing rail (312, 314) during welding of the base connection device (160) to the plastic covering (313, 315) of the at least one loadbearing rail (312, 314).

7. The wiper blade as claimed in claim 6, characterized in that the at least one loadbearing rail (312, 314) is welded to the base connection device (160) by ultrasonic welding.

8. The wiper blade as claimed in claim 7, characterized in that the adapter unit (150) has plastic and is welded to the base connection device (160) in order to articulate the wiper strip (112) on a wiper arm (118), the adapter unit (150) being configured for connection to a connection member (190) of the wiper arm (118).

9. The wiper blade as claimed in claim 1, characterized in that the at least one loadbearing rail (312, 314) is formed with broad sides (461, 463, 471, 473) and narrow sides (462, 464, 472, 474), the flat welded seam (419, 421) being formed on one of the broad sides (461, 463, 471, 473).

10. The wiper blade as claimed in claim 1, characterized in that the basic body (290) includes lateral holding members (220, 240) which engage as claws at least in sections around the at least one loadbearing rail (312, 314).

11. The wiper blade as claimed in claim 10, characterized in that the flat welded seam (419, 421) is formed between a broad side (463, 473), facing away from the basic body (290), of the at least one loadbearing rail (312, 314) and a connecting section (226, 246), facing the loadbearing rail (312, 314), of the lateral holding member (220, 240).

12. The wiper blade as claimed in claim 1, characterized in that the at least one through-passage opening (222, 242) is configured to guide the welding tool (293, 295) through the basic body (290) as far as the at least one loadbearing rail (312, 314) during welding of the base connection device (160) to the plastic covering (313, 315) of the at least one loadbearing rail (312, 314).

13. The wiper blade as claimed in claim 1, characterized in that the at least one loadbearing rail (312, 314) is welded to the base connection device (160) by ultrasonic welding.

14. The wiper blade as claimed in claim 1, characterized in that the adapter unit (150) has plastic and is welded to the base connection device (160) in order to articulate the wiper strip (112) on a wiper arm (118), the adapter unit (150) being configured for connection to a connection member (190) of the wiper arm (118).