Switch arrangement, particularly for a router

• US 5,570,776 A
• Filed: 03/02/1995
• Issued: 11/05/1996
• Est. Priority Date: 03/03/1994
• Status: Expired due to Term

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Stirm, Michael, Buchholz, Achim
• Primary Examiner(s): Luebke, Renee S.
• Application Number:
  US08/397,627
• Time in Patent Office: 614 Days
• Field of Search: 200/321, 200/322, 200/330, 200/331, 200/332, 200/332.1, 200/332.2, 200/335, 200/337, 200/318, 200/318.1, 200/318.2, 200/43.11, 200/43.16, 200/43.17 , 200/43.22, 200/320, 200/334, 200/522
• US Class Current: 200/43.17
• CPC Class Codes: B24B 23/005 Auxiliary devices used in connection with portable grinding machines, e.g. holders
• CPC Class Codes: B27C 5/10 Portable hand-operated wood-milling machines; Routers
• CPC Class Codes: H01H 3/20 wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling
• CPC Class Codes: H01H 9/06 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
• CPC Class Codes: Y10T 409/306608 End mill [e.g., router, etc.]

Abstract

A switch arrangement, particularly for a router, is provided with a switch and a pivotable trigger element in a handle arrangement, which can be pivoted against spring force from a release position into a switch operating position and on which is held in a displaceable manner a locking element which in an end position prevents the displacement of the trigger element in the direction of the switch operating position and which by engagement of a gripping area by hand can be displaced against spring force into a first position, in which the trigger element can be pivoted into the switch operating position so that the locking element in a second position locks the trigger element in the switch operating position. The trigger element is substantially L-shaped and is pivotably held at the free end of one of its legs. The locking element is pivotably held at the free end of the other leg and the gripping area of the locking element is located between a pivot connection with the trigger element and a connection area of the legs of the trigger element and at the side remote from the one arm. The locking element on the side with the gripping area is provided between this area and the pivot connection with a locking surface which cooperates with a countersurface of the handle arrangement and the locking element is provided on the side facing towards the one leg between the pivot connection and the connection area of the legs with a locking part which in the second position is in locking engagement with a locking portion of the handle arrangement.

Claims

1. A switch arrangement for a router, comprising a spring biased switch (45) and a trigger element (30) which is pivotably held in a handle arrangement (7) adapted to be mounted on said router, which trigger element is pivotable against said spring biased switch from a release position into a switch operating position and on which is held in a displaceable manner a locking element (38) which in an end position prevents displacement of the trigger element (30) in the direction of the switch operating position and which by engagement of a gripping area (40) on the locking element by hand is displaceable against a spring member into a first position, in which the trigger element (30) is pivotable into the switch operating position so that the locking element (38) in a second position locks the trigger element (30) in the switch operating position, characterised in that the trigger element (30) includes legs connected at a connection area in a substantially L-shaped configuration and is pivotably mounted about a pivot connection (37) at the free end of one of its legs (31), that the locking element (38) is pivotably held at the free end of the other leg (32), that the gripping area (40) of the locking element (38) is located between the pivot connection (37) with the trigger element (30) and the connection area of the legs (31, 32) of the trigger element (30) and at a side remote from the one leg (31), that the locking element (38) on the side with the gripping area (40) is provided between this area and the pivot connection (37) with a locking surface (39) which cooperates with a countersurface (16) on the handle arrangement (7) and that the locking element (38) is provided on the side facing towards the one leg (31) between the pivot connection (37) and the connection area of the legs (31, 32) with a locking part (41) which in the second position is in locking engagement with a locking portion (14) on the handle arrangement (7).

2. A switch arrangement according to claim 1, characterised in that the locking surface (39) is formed by a step in the locking element (38).

3. A switch arrangement according to claim 1, characterised in that the locking part (41) is hook-shaped, that the locking element (38) in the second position is pivoted over the first position out of the end position and that the trigger element (30) in the second position of the locking element (38) is positioned slightly pivoted back from a maximum extent from the release position such that the locking part engages the locking portion (14) on the handle arrangement.

4. A switch arrangement according to claim 3, characterised in that the locking portion (14) of the handle arrangement (7) is provided with a ramp surface (14'"'"'), with which the locking part (41) comes into engagement when the locking element (38) is displaced into the first position and that the locking element (38) after the hook-shaped locking part (41) has run over the end of the ramp surface (14'"'"') is pivotable in a direction of the second position.

5. A switch arrangement according to claim 1, characterised in that on the side of the one leg (31) which is facing towards the other leg (32) of the trigger element (30) an actuator part (34) is provided and this actuator part (34) is in engagement with an actuator arm (49) of a rod element (48) which is mounted in the handle arrangement (7) for rotation about a longitudinal axis and which is coupled mechanically to the switch (45).

6. A switch arrangement according to claim 5, characterised in that the rod element (48) is provided at an end opposite the actuator arm (49) with an actuator surface adapted to engage a switch pusher (47) on the spring biased switch (45).