DE1218592B - Electrical device with movable handle for switching on and off - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

AJLa

GERMAN # 0TSW PATENT OFFICE Int. α .:

HOIh

EDITORIAL

German class: 21c-40/50

Number:
File number:
Registration date:
Display day:

H43132VIIId / 21c
14. JuH 1961
June 8, 1966

The invention relates to electrical equipment and, more particularly, relates to the storage of a pivotable handle on the device in such a way that at the same time with the lock a switching on of the Device controlling switch can be operated. One applicability of the invention is in particular but not exclusively given with electric floor polishing machines.

The invention is intended, compared to known devices, with only switching the device on and off by means of a movable handle serving devices, an electrical device having a main body and a movable on this between an operating position and an inoperative position, for handling the device serving handle as well as with a device for locking the handle and a switch for switching the device on and off can be provided, in which the actuating device for the switch and for locking the handle in a simple manner are combined that they work properly and reliably despite the manufacturing tolerances of the various parts work.

For this purpose, according to the invention, on the main body of the device there is a common arrangement of the switch and a locking member serving support bracket attached, which at the same time as a bearing member for the pivot pin firmly connected to the handle and as a carrier for a switch at Pivoting the handle into the inoperative position in the sense of switching off the device Actuator and for a together with a locking pawl of the arranged on the bearing block Locking member used to lock the handle in its inoperative position Locking member is formed.

In a device designed in this way, any manufacturing tolerances, which otherwise the exact position of the bearing block in relation to the main body and other parts of the device could not affect it at all. This also includes the entire locking and switching mechanism of the device combined into a small, self-contained unit, which is in front of the Insertion into the device, to which essentially only the attachment of the support bracket to the main body is required, can be assembled, and their proper action depends on their exact location in the Device is independent and can be checked before installation.

Furthermore, the pivot pin can be connected to a vibration damper, the friction surfaces on-electrical Device with movable handle for switching on and off

Applicant:

Hoover Limited,

Greenford, Middlesex (Great Britain)

Representative:

Dipl.-Ing. W. Paap, Dipl.-Ing. H. Mitscherlich
and Dipl.-Ing. K. Gunschmann, patent attorneys,
Munich 22, Mariannenplatz 4

Named as inventor:

Mark Wilson Heim, Canton, Ohio (V. St. A.)

Claimed priority:

V. St. v. America July 15, 1960 (43 039)

has, which are pressed against each other by a spring, the one friction surface and non-rotatable the other is rotatable together with the handle and the pivot.

Further details and advantages of the invention emerge from the following description of a Embodiment based on the drawings.

Fig. 1 is a side view of an electric polisher according to the invention;

F i g. Figure 2 is an abbreviated rear view, partially in section, showing the pedestal and handle reveals;

Figures 3 and 4 are sections taken along line 3-3 in Fig. 2, Fig. 3. The parts in the rest position and F i g. 4 shows in the operating position.

The polishing machine comprises a main body 10 which rests on brushes 11, which are not used here Electric motor shown are driven, which is enclosed by a housing 12 and via a Cable 14 and a plug can be connected to a power source. The handle 13 is on an on Main body hinged bracket 32 attached.

The invention relates to the rotatable mounting of the handle on the main body with the aid of a U-shaped bracket 16, which has a base part releasably attached to the main body by means of screws 20 and upwardly extending legs 18 and 19 includes. The shape of the leg 19 is shown in FIG. 3 and 4 emerge; it has several appendages, the purpose of which continues

609 578/412

is explained below. Both legs 18 and 19 serve as bearings for a bearing axle 21, by means of which one leg 31 of the handle is rotatably mounted.

The in Fig. 2, the inner end 22 of the bearing axis, which appears on the right-hand side, has parallel surfaces 23 and is of a correspondingly shaped opening of the hub 24 of a switch actuating cam 25 added; the: hub 24 is in turn from an opening in the leg 19 of the bearing block recorded. The outer end of the bearing axis is circular and mounted in the leg 18 of the bracket; on the outside of the leg 18, the bearing axis protrudes through a wall 28 of the housing 12 and ends in a section 27 of smaller diameter. One leg 31 of the bracket 32 has a Opening for receiving the thinner bearing axle section 27; also with the section 27 is a Arm 29 rigidly connected by welding or brazing; this arm is on the leg 31 of the bracket 32 fastened with a screw 30. Thus, the bearing axis is forced to move together with the bracket and to turn the handle.

The other arm 33 of the bracket is mounted on one end 34 of a rod 35 which is coaxial with the Bearing axle 21 is arranged and comprises a flat portion 36 which is on an extension 37 of the Main body rests and is fastened to it with a screw 38. Movements of the bracket legs 31 and 33 can be prevented in the direction of the bearing axis by two angle pieces 39, each one Extension 42 with a threaded hole for receiving an upward into the main body extending screw 44 wear.

To vibrate the main body of the floor polisher to dampen compared to the handle around the bearing axis, the bearing axis 21 with a Equipped with vibration damper. A compression spring designed as a helical spring is attached to the bearing axis 45 pushed, one end 46 of which presses against the leg 18 of the bearing block, while the other end 47 is supported on a pressure plate 48 which rests on a friction disk 49 which is in a recess 50 of the switch actuating cam 25 is arranged. Rotational movements of the pressure plate 48 are prevented by a fork-shaped extension 51 of the pressure plate, the slot 52 of which is stationary Receives pin 53, which extends between the legs 18 and 19 of the bearing block.

The bearing axis 21 also forms part of a locking device for the handle. The inner The end 22 of the bearing axle 21 protrudes through the hub 25 of the switch actuating cam to the inside of the Leg 19 of the bearing block and there carries a locking piece 56 which z. B. by Caulking is rigidly connected and cooperates with a locking lever 55. The latter is mounted on the bearing block leg 19 by means of a bolt 60 and carries a rearwardly projecting one Arm 61 with a pedal piece 62 which can be operated by the user of the device with the foot. In front of the bearing pin 60, the locking lever 55 carries an upwardly extending arm 63, which is in a Hook 65 ends, which by a tension spring 66 with a hook 67 on the leg 19 of the stationary bearing block connected is.

The locking piece 56 has three notches 57, 58 and 59. The notch 59 works with a protruding one Part of the fixed pin 53 together to pivot the handle forward about its in Fig. 3 to prevent vertical rest position also shown. According to FIG. 3 forms the arm 63 of the Locking lever 55 has a pawl surface 64 which cooperates with the catch 57 to the handle in his to lock vertical rest position. On the pawl surface 64, the catch 58 can act to the Limit downward movement of the handle beyond a substantially horizontal position. Movements of the locking lever according to FIGS. 3 and 4 counterclockwise and against the force the tension spring 66 are limited by the fact that an extension 68 at the end of the horizontal arm 69 of the Locking lever according to FIG. 4 for resting on a curved surface of the locking piece 56 comes.

A switch 70 with leads 72 and 73 for connection to the circuit of the motor is also attached to the bracket leg 19 by means of screws 71. The actuated by a plunger 74 Switch is normally closed as long as the plunger is not pushed in. The switch operating cam 25 has a laterally offset cam surface 75, and the plunger 74 of the switch works as a movement pick-up element with this cam surface, so that the switch is opened when the handle is brought into the rest position according to FIG. In other positions, e.g. B. those According to Figure 4, the cam surface gives the rod free so that it can move outward to close the switch.

It should be noted that the bearing block 16, the switch 70, the switch actuating cam 25, the locking piece 56 and the locking lever 55 carries, so that thereby the position of all these parts opposite the center line of the bearing axis 21 is determined and there is only a single reference point for all manufacturing tolerances.

In a modified design, the compression spring 45 is replaced by a torsion coil spring, one end of which engages with a hook on the switch operating cam 25, while the other The end engages with a hook on the leg 18 of the U-shaped bearing block, so that a pretensioning force couple is applied, which tends to take the weight of the handle when the handle is inclined Takes position.

Claims (4)

Patent claims: 1. Electrical device with a main body and one on this between an operating position and an inoperative position movable handle for handling the device and a device for locking the handle and a switch for switching on and off of the device, characterized by one on the main body (10) of the device attached, for the common arrangement of the switch (70) and a locking member (55) serving support bracket (16), which at the same time serves as a bearing member for the fixed with the handle (32) connected pivot pin (21) and as a support for a switch (70) when pivoting the Handle in the inoperative position in the sense of switching off the device adjusting actuator (25, 75) and for a together with a locking pawl (64) of the on the bearing Bock arranged locking member (55) for locking the handle in its inoperative position serving locking member (57) is formed. 2. Apparatus according to claim 1, characterized in that the formed in the form of a cam Actuating member (25, 75) for the switch (70) is coaxial with the pivot pin (21) arranged portion and on a switch (70) actuating cam follower (74) attacks. 3. Apparatus according to claim 1 or 2, characterized in that the pivot pin (21) also serves as a carrier for a vibration damper. 4. Apparatus according to claim 3, characterized in that the vibration damper has friction surfaces (48, 48) which are held in mutual contact by a spring (45) and of which one friction surface (48) cannot rotate and the other together with the bearing axis (21) and the handle (32) is rotatable. Considered publications:
U.S. Patent Nos. 2,882,373, 2,906,832. 1 sheet of drawings 609 578/412 5.66 © Bundesdruckerei Berlin