DE2359292A1 - SWITCH ARRANGEMENT WITH MINIATURE CONTROL SWITCH - Google Patents

Description

OUTLEE-HAMMER WORLD TRADE, IFG.
Switch arrangement with miniature reversing switch.

The invention relates generally to electrical reversing switches for tools with a motor drive or the like., and in particular improvements in the same, which lead to the miniaturization of such switches and savings in manufacture contribute.

There are already different switches for

Power tools and household appliances are known to have the. To reverse the direction of rotation of the electric motor of the same «. It should be noted that in the field of manufacture of this Switch there is fierce competition, so. that the east the same must be kept as small as possible. Simultaneously however, the users of such switches require manufacturers to supply switches that are less than quality the switches previously used is improved. Apart from the question of cost, the known switches are generally involved and bulky and require a considerable amount of space in the tool.

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As a result, the draft of Reverse was ~

have been an extremely active field of activity in recent years! the first intended purpose being to make such switches by reducing the number of components required to improve them, to shrink them, to make them more permanent, 'more reliable and cheaper, and to enable them to be attached to devices that have certain dimensional restrictions

The general purpose of the invention is that

Manufacture of an improved reversing switch of the described Kind, which solves the above problems and eliminates other disadvantages of the previous technology.

The invention aims in particular

Manufacture of a permanent electric miniature reversing switch for tools and equipment, which can be manufactured at low cost, has a small number of ropes, and is designed so that it can be easily and simply mass-produced.

For this purpose, the inventive miniature

Reversing holder for tools with motor drive and built-in Switching means and means for locking the switching means in the selected position, characterized in that the Switching means contain control means around the locking means around can be mounted so that an independent operation of these two means is possible, the Control means can be operated with the switching means so that the motor can run forwards or backwards

The invention is explained below by way of example with reference to the drawing.

Fig. 1 shows in a side view below

Breaking away ropes a push-button switch built into the handle of a motor-driven tool, which the miniature reversing switch according to the invention contains

Fig. 2 is a perspective view;

which the miniature reversing holder of Fig. 1 in combination, with a known push button switch shows.

Fig. 3 is an exploded perspective view View of the inventive Kiniatureumsteuerschalters of FIGS. 1 and 2.

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Pig. 4 is a bottom view

the housing of the miniature reversing switch, which details, of the internal structure shows, with a solid contact inserted is.

Pig. Figure 5 is a section along line 5-5

the Pig · 4, which has the lid in the closed position shows.

Pig. Figure 6 is a front view of the reversing switch of the Pig. 4th

Pig. 7 is a top plan view of the FIG

Contact carrier and the control button formed arrangement, wherein the contact strips are in place «

Pig. 8 schematically shows the tool motor and the circuit according to the invention for the goalkeeping of the motor.

Pig. 9 schematically shows the tool motor and the circuit according to the invention for reverse running of the motor.

Pig o 1 shows a portable tool, designated as a whole by 10, with a motor drive with a push-button switch 12j, which has a switch 14 according to the invention for reversing of the engine.

The tool shown has one

downwardly extending pistol _{handle 16 P} in which the switches 12 and 14 are built o The handle 16 _S, which can be made of cast aluminum or a very shock-resistant plastic, can be divided into two sections and is surrounded by the switch 12 with the usual shaped ^ Gates or ribs 17 and 18 and provided with an opening 22 through which the lever handle 24 of the switch 12, which executes a linear sliding movement, passes. The handle 16 is also provided in its side wall with a hole 26 through which a conventional pin 28 for locking the switch 12 passes. It also contains a hole 30 in its bottom wall through which the insulated feeder 32 and 34 pass. Conductors 32 and 34 connect the switch to a power source (not shown).

The structure and mode of operation of the

"u> rs 12 correspond to the one in the on 10. Karζ 1972 on the Hamen H ₄ J ₀ Brown US with the title" Butt Contact Speed Control Trigger

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Switch "and the assignee of the present application assigned patent application Ur. 233,621 illustrated and described. As explained below and illustrated in Pig 2, the switch 12 has an insulating base 42, a switch frame 44 for attaching the trigger 24 to the base 42, a locking pin 28 attached to the switch frame 44 and a compression coil spring (not shown) within of switch 12, which pushes trigger 24 out of base 42. When the trigger 24 is actuated (not shown) Contacts within the switch 12 are bridged and close the supply circuit of the motor 36 via conductors 48, 50, 52, 54 And 56.

Make the above brief general description of the construction and operation of a common tool with motor drive and a well-known push-button holder for the same below is a unique, inexpensive miniature switch described in more detail for reversing the direction of rotation of the motor by interacting with the above switch 12 and the motor 36, Where like parts are denoted by the same reference numerals in the description and in the different views are.

In I ¹ Ig. 1 and 2, the miniature reversing switch 14 for the motor is mounted on top of the frame 44 of the switch 12. It should first be noted that the switch uses a very efficient and compact double pole sliding bridge arrangement to reverse the motor, and that this arrangement has approximate dimensions of barely 11 mm by 28.5 mm by a height of 3.2 mm. Furthermore, a double-pole sliding bridge arrangement is shown to explain the invention, but it is clear that the structure explained can also be used for other types of switches, for example double-pole double-stroke switches or other design modifications of single-pole or multi-pole switches.

Pig. 3 shows the individual elements of the reversing switch in an exploded view. Of the Switch 14 is provided with an insulating housing 60 of a suitable one electrically insulating material, e.g., malleable plastic, provides and supports molded studs 62 and 63 the housing 60 to a certain position on the frame 44

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ben * Step into frame 44 when assembling housing 60 the tenons in two holes 64 and 65 and can either be pressed in or deformed by heat to secure the housing 60 to the frame 44.

Inside the housing 60 has a certain number

of spaced apart molded insulating shoulders 66 ₅ as in Pig. 3 and 4, which recesses 68 form in the housing 60, which individual contact spring *! 7O ₃ 71, 72 and 73 take up «The contacts 70 to 73 are made of a highly electrically conductive material 2.B0 copper _s and individually in the depressions 68 next to outer housing openings 74 near the rear of the housing 60 by a hinged cover or a flap 76 is fastened ₉ _which has a locking member 78 ₉ which, when the flap 76 is closed, cooperates with shoulder portions 79 in the housing 60, as shown in Figure β 5 «

The contacts 70 to 73 have openings 82

and 83 and at one end retaining springs 84 _S which hold conductors 48, 50, 52 and 54 and bring them into the correct position _o The conductor ends are inserted through openings 74 and 82 and are held in these by retaining springs 84 * stops 91 at of the flap 76 prevent the conductors from getting behind the springs 84 through the openings on the inside the retaining springs 84 of the conductor can reach without having to disassemble the switch 14. The membrane serves to shield the bare electrical conductors from the environment and can be easily closed with a plug after ■ drilling through.

The contacts 70 to 73 have bent conductive conductors on the opposite side of the end receiving the conductor Sections 93 'which extend from the recesses 68 into a sliding recess 80 in order to be connected to a sliding contact carrier arrangement 95 to come into contact ^ which can be actuated from the outside through an open end section 96 of the housing 60 is"

The carrier assembly 95 is a single one

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A plastic molding made from a generally rigid insulating material with good resilience, such as ITylon, and handles a slider 98, a flexible hinge 99, and a knurled one Actuation button 100.

On a side of the slider 98 is a

Locking projection 101 is formed as in Pig. 3 and 7 shown, around with locking recesses 102 and 105 in the flexible side wall 104 of the housing 60 to engage the slider 98 to be detachable in the position for forward running or reverse running. The slider 98 also has a stop 105, which is enclosed by the recess 106 in the housing 60 and prevents the locking projection 101 from going over the indentations 102 and 103 goes beyond.

The slider 98 is also in his

The top is provided with notches 107 and 108, in which contact members 110 and 112 are attached, which cut generally flush with it _s as in Pig. 6 and 7 shown. The conductive portions 93 are positioned so that they lie on the contact members 110 and 112 in the longitudinal direction thereof, thereby creating a circuit between them and the contact members after the assembly of the switch 14 with the frame 44 in the recesses 107 and 108 being held. The underside of the slider 98 rests against the upper side 44a of the frame 44 and slides thereon, while it is held laterally by the side wall 104 and the shoulder 113 of the cover flap sections 76.

The operating button 100 has a locking lug 114 which is formed on its periphery and can cooperate with spaced-apart slots 116 and 118 in the pusher 24, so that the button 100 must be brought into one or the other of two positions, as in Pig . 2 to enable the push-button 24 to be pushed into the switch frame 44 . Apparently any movement of the trigger for all other positions of the button is prevented by the middle shoulder portion 120 of the printer 24

The actuation button 100 also contains one

central bore 122 for its concentric attachment to the Socket 123 of the locking pin and extends also

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to the side of the handle 16 with the pin 28 in such a position that it can be operated. It should be noted that this arrangement does not require any additional auxiliary openings in the handle 16, and that the bore 26 present in the handle for the locking pin only to be enlarged a little needs to pick up the actuator button 100- The rotation of the actuating button 100 on the socket 125 evidently causes a displacement of the contact sliding piece 98 by the flexible one Joint 99 such that selected pairs of contacts 70 Ms 73 are bridged with the contact pieces 110 and 112 ^ so that the motor 36 either engages the tool 10 upon actuation of the switch 12 driving in the forward direction or in the reverse direction.

Just the forward rotation of the actuating button 100, as shown in Figure 8, bridges the contacts 70 and 73 for connecting the conductors 48 and 54, while the contacts 71 and 72 for connecting the conductors 50 and 52 are bridged. In this position, flows after closing of the switch 12 the current to the motor 36 from the switch 12 via the conductor 48 to the contact 70 of the switch 14 ₅ which is connected by the contact piece 110 to the contact 73o The current flows via this and the conductor 54 to the motor armature terminal 126 and returns to the switch 14 from the motor armature terminal via the conductor 50 to the contact 71 ⁰ The bridging of the contacts 71 and 72 by the contact piece 112 completes the circuit via the conductor 52 to the motor field terminal 130 and back to the switch 12 via the motor field terminal and the ladder 56 _β

"Correspondingly, the reverse rotation of the actuating button 100 causes the contact elements to be shifted 110 and 112 over the conductive portions 93 of the contacts 70 to 73 in the manner shown in Fig. 9, so that the motor 36 the tool 10 after actuation of the holder 12 in the reverse direction drives - In this position the contacts 70 and 71 are bridged so that they connect the conductors 48 and 50. The contacts 72 and 73 for connecting the conductors 52 and 54 are also bridged. Apparently this causes this shift the drive of the tool 10 by the motor 36 in the

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Backwards direction after pressing the trigger, because the power supply to anchor terminals 126 and 128 was reversed.

It is to be noted that the above, in Pig.

7 illustrated embodiment »■ the iDrägeranordnung 95 for the reversing switch 14 can be modified »For example, an elongated reversing lever located above the pusher 24 of the type described in the American patent Hr. 3,260,827 (CJ. Frenze) shown and described type are used, which is formed on the flexible joint 99 or mechanically with this is connected and replaces the operating button 100. The pivoting of such a lever on the housing 60 is granted the slider 98 via the joint 99 a reciprocating linear sliding movement. Finger-operated levers can also be used in the American patent KTr. 3,376,402 (I.E. Bednarski) described and illustrated type replace the actuating button 100 and on top of the housing 60 for actuation of the slider 98 can be pivoted.

As can be seen from the foregoing, the invention provides a substantial advance Reduction in the number of components for reversing switches for tools and devices with motor drives. Furthermore, apparently one such a reduction in the number of components together with the novel design and interaction with the parts used a very effective and durable miniature switch, which is cheap to manufacture and easy to incorporate into existing tools without significant or expensive changes to the Tool handle or additional tangled wiring during assembly of these tools

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Claims (1)

Patent claims (1. \ Switch arrangement for. Tools with motor drive and built-in switching devices as well as devices for locking the switching devices in the desired position, characterized in that the switching devices contain control devices which can be attached around the locking devices so that these two devices can be operated independently is possible, whereby the control devices and the switching devices can be operated so that the motor can run forwards or backwards 2o switch arrangement according to claim 1, characterized in that that the switching devices have a first switch (12) for supplying the motor and a second, the control devices for the selection of the operating mode containing switch (14) on, have, wherein the locking devices cooperate with the first switch (12) and the second switch (14) is interconnected with the first switch (12). 3ο switch arrangement according to claim 1 and 2, characterized in that that the locking devices have a socket (123) and a laterally extending from the switch housing (16), in this socket mounted locking pin (28) comprise, the control devices by a cylindrical Rotary knob (100) are formed with a cylindrical bore which surrounds the locking pin, such that the locking pin and the operating button can be operated independently of each other., 4th switch arrangement according to claim 1 to 3, characterized in that that the switch (12) by a pusher (24) with a plurality of slots formed in a side surface of the same (116, 118) and shoulders (120) is operated, the 409 83 3/0282 Control devices have locking devices (114), which with the slots (116, 118) and the Schlultem (120) cooperate so that they operate the rotary knob (100) prevent when the switch (12) is on « 5ο switch arrangement according to claim 1 to 4, in which the Reversing switch has fixed and movable contacts, thereby characterized in that the movable contacts (110, 112) are carried by a sliding piece (98), which of the Rotary knob (100) is operated via a flexible joint (99). 6o switch arrangement according to claim 1 to 5, characterized in that that the fixed contacts (70 to 73) of the reversing switch with springs (84) to hold back the corresponding Conductor wires (48, 50, 52, 54) are provided, the housing of the reversing switch at the insertion points of the conductor wires has holes (92) provided with a pierceable membrane. 7. Switch arrangement according to claim 5, characterized in that the slider (98) is a one-piece Plastic part is. 409833/0262