ES2202650T3 - ELECTRICAL CIRCUIT DRIVING MECHANISM. - Google Patents

Abstract

THE PRESENT INVENTION REFERS TO A MECHANISM (10) FOR DRIVING AN ELECTRIC CIRCUIT THAT HAS A COVER (124) WHOSE PREVIOUS WALL IS COMPOSED BY A WIDTH SURFACE AND MOVED BY A MOBILE MODE THROUGH PINS (126) THAT CROSS OPENINGS (126) 108) FORMED IN A SUPPORT (90, 90 '') OF ACCOMMODATION (12, 12 ''), BEING SUCH COVER (124) REQUESTED FOR THE SPRINGS (130) LOCATED IN THE PINS (126). COVERS (136) OF THE COVER (124) COUPLED TO THE LEGS (118) OF THE FIRST AND SECOND ARM (112, 114) IN A MANUAL WAY THAT PIVOT SUCH LEGS (112, 114) THEN THEN PIVOT A LEVER LEVER (100) SUCH LEVER (100) CONSISTS OF A DRIVING FINGER (104) THAT SUPPORTS ON THE SCALE (38) OF A SWITCH (36) SO THAT THE CIRCUIT IS DISCONNECTED. THE COMPONENTS OF THE MECHANISM CAN BE EASILY ASSEMBLED (10) PLACING THEM THROUGH INTERLOCK OR SLIDING AND JOINING THEM THROUGH A MINIMUM OF BATCHES.

Description

Circuit drive mechanism electric.

This invention generally relates to a safety mechanism for mechanical tools and more specifically, to a circuit drive mechanism electric which, once correctly mounted on the support a mechanical tool, allows the operator to turn on the tool motor by conscious depression of a actuator, of relatively small size, but which allows that the engine can be shut down by depression of a surface relatively broad, using any part of the body, and especially a part of the body other than the hands of the operator, so that he does not need to look away from the work you are performing or stop using your hands to Turn off the cutting tool or abrasive tool.

Each of the following US art states 3,312,799; 4,166,202; and 4,389,550 (more similar prior art), describes various forms of switch actuation mechanisms, which feature a wide surface panel element, either of one type or another, mounted, rotatably, close to the operator's position. , this element being mechanically attached to the on / off lever of the toggle switch. When the engine is running, it can be turned off by hitting the wide surface panel element, with one or more parts of the operator's anatomy, without having to use your hands. In addition, this operation can be performed without taking your eyes off the work surface of the machine, which is currently being used. This, of course, leads to greater safety, preventing accidents or inadvertent movements of the workpiece or of the hands that can be made, which due to the position, can be injured by the tool.

However, it can be seen that due to assembly with hinges of the wide surface in the mentioned states of the art 3,312,799; 4,166,202; and 4,389,550 when hitting the wide surface panel element, along the end adjacent and parallel to the axis of rotation, as well as adjacent to the axis turning, the wide surface element may not be rotated, and have the switch actuated or the engine of the tool. Other ways of assembling elements of large surface, as they appear in the US patent 3,233,071, and although it reduces the possibility that pushing the wide surface element will not trigger the switch, however these adaptations do not eliminate this possibility.

The state of the art 5,510,587 describes a form of drive mechanism with switch that includes a wide surface panel element, which exceeds deficiencies of the prior art, making it possible for any point of the wide surface move, in a direction of drive that deactivates the electrical circuit. In the realization of the state of the art 5,510,587, specifically a multiplicity of momentary deactivation switches, the which handle a control relay. It can be understood that the control relay and the electrical circuit associated with it, as well as the costs of the momentary switches themselves, increase the electric circuit drive mechanism price, limiting its merchantability for industrial applications or Similar commercial applications.

In addition, the invention of those mentioned drive mechanisms tended to be too expensive to the time of manufacture, due to the number of parts needed and the difficulty at the time of assembly, doing, in a certain way, difficult to market at a price that was in in line with the cost of the tool to be used, in which which adapted the security mechanism.

The present invention provides a mechanism for electric circuit drive which has the features and characteristics described in the claim section one.

Now he goes on to describe how to take practice the invention, referring to the drawings that the accompany, according to which:

A perspective of the electric circuit drive mechanism according to the present invention

A cut view is shown in Figure 2 transverse of the electric circuit drive mechanism of Figure 1, according to section line 2-2 of Figure 1, with separate pieces and shown in view transparent to show the characteristics of your building.

A cut view is shown in Figure 3 transverse of the electric circuit drive mechanism of Figure 1, according to section line 3-3 of Figure 2, with separate pieces and shown in view transparent to show the characteristics of your building.

Figure 4 shows a partial view of the cross section of the circuit drive mechanism electrical of Figure 1, according to the section line 4-4 of Figure 2.

A partial view is shown in Figure 5 electric circuit drive mechanism perspective of Figure 1, with separate pieces shown in transparent view to show the characteristics of its construction.

Figure 6 shows a view in perspective of an alternative form of a mechanism of electric circuit drive, in accordance with the present invention.

A developed view is shown in Figure 7 in perspective of the electric circuit drive mechanism of Figure 6.

All figures are drawn only with the purpose of explaining; the extensions of the figures with respect to the number, position, relationship, and dimensions of the pieces forming the preferred embodiment of the present invention,  will be explained or found in the experience in the art, once you have read and understood the following description of the preferred embodiment. You will also find yourself in the experience in the technique, once the following has been read and understood description, exact dimensions and dimensional proportions that fit the specific strength, weight, strength, and similar requirements.

In the various figures of the drawings it has been used the same numbers to designate the same parts or Similar. In addition, when using the terms "up", "down", "first", "second", "inside", "outside", "front" "part rear "," external "," internal "," lower ", "height", "width", "length", "end", "side", "horizontal", "vertical", "part later "and similar terms, it should be understood that such terms only refer to the structure shown in the drawings, as it would appear before the person looking at the drawings, and are used exclusively to facilitate the Description of the preferred embodiment.

A circuit drive mechanism electrical, according to the present invention, is the one that shown in the drawings, being generically designated 10. The mechanism 10 normally includes a box 12. In the embodiment preferably, box 12 includes a channel 14, which has a fund plane 16, and a first and second side planes 18, which extend generally perpendicularly from the ends of the opposite side from bottom 16. Box 12 also includes a first and second extension 20 ranging from the sides 18 outward. Extensions 20 end in a first and second wall 22 side and flat, which usually extend parallel to the sides 18. A wall 24 upper end is generally perpendicular between the bottom 16, sides 18, extensions 20, and side walls 22. A bottom bottom wall 26 extends generally perpendicular between extensions 20 and side walls 22, being open the bottom of the end of channel 14.

The box 12 also includes an L-shaped divider 28, having a first plate 30 and a second plate 32, generally extending perpendicularly to the first plate 30. This plate has a width for sliding sliding between the sides 18, and a height that generally equals sides 18. Plate 32 has a width of the size necessary to limit the upper ends of sides 18, and a length extending from plate 30 to the upper end wall 24 , parallel to the bottom 16 of the channel 14. On the sides 18 and the bottom 16, slides 34 suitable for sliding the plate 30 can be formed. A toggle switch 36 is mounted to the plate 30, with an articulated lever 38 extending from the plate 30, in the same direction as the plate 32, and a body 40 is located on the opposite side of the plate 30, and not of the plate 32. The articulated lever 38 can be moved between the position on and the off position, with e l switch 36 in the on position, keeping the electrical circuit, and in the off position, cutting the electric circuit.

The mechanism 10 also has an actuator 42, usually U-shaped, which has a flat front 44 and a first and second leg 46 extending in parallel and spaced from the rear front surface 44. The actuator  42 is movably mounted to plate 32, through the legs 46, extending through the first parallel grooves 48, which extend from the free end of the plate 32 towards the plate 30. In the preferred embodiment, the second grooves parallel 50 go from the free end of the plate 32, towards the plate 30 parallel and intermediate to the grooves 48. One ear 52 extends in each of the slots 48 adjacent to the end free of the plate 32, going in the opposite direction to the slots 50. Ears 52 border the upper end of the groove formed at the upper ends of the legs 46. It is thus appreciated that the plate material 32 between slots 48 and 50 can flex enough to allow the insertion of the legs 46 in the slots 48, past the ears 52, but after this insertion, returns to normal size, so that ears 52 can capture the legs 46 in the slots 48. An actuator guide 54 U-shaped extends completely from plate 32 adjacent to its free end, and in the opposite direction to plate 30. Guide 54 has the size and shape necessary to slide, of Sliding shape, front 44 of actuator 42.

The first and second parallel ear 56 is extend from plate 32, opposite guide 54, and on sides opposite the grooves 48. A U-shaped clamp 58 is mounted rotatably in the ears 56. The clamp 58 between the closed or interference position, extending from ears 56, normally parallel to sliding movement of actuator 42, and the position of no interference or not closed. Clamp 58 includes a cam leg 60, L-shaped, which extends there. A device is mounted closure 62, of a commercial variety, on one of the sides 18, and a latch 64 is included, going at an angle not parallel to the axis of rotation of the closure 62, and located as an intermediary in the leg of cam 60 and clamp 58. Therefore, the rotation of the closure 62 causes the latch 64 to rotate the clamp 58, between the closed and unclosed position. In the closed position, as it can be seen in Figure 5, the free ends of the legs 46 of actuator 42, in an external position of not driven, terminates in channel 14 and are adjacent to clamp 58, so prevent the actuator 42 from slipping in and its position not activated. In the non-closed position, the clamp 58 does not interfere with actuator 42, so that it is free to slide on the plate 32 to its position of actuated. To facilitate assembly, while the assembly of the mechanism 10, a retainer can be formed in one of the ears 56 or in the clamp 58, to slide in a slide depression, formed in the other ear 56 or in the clamp 58, to thus hold the clamp 58 in its closed position.

The third and fourth ears 68, parallel and elongated, extend entirely from plate 32, facing the guide 54, and the intermediate ears 56 and the plate 30. It is assembled from rotating way a switch 70 lever, between the ears 68, between means of its upper points and its lower points. This lever 70 must be correctly connected to the actuator 42, of so that the sliding movement of the actuator 42 causes it to produce a rotating movement of the switch 70 lever. In the preferred embodiment, the grooves 72 are formed in the bottom ends of legs 46 of actuator 42, and receiving of the upper end of the lever 70 occurs with movements Rotating and sliding. The part under the lever 70 must be correctly connected to switch 36, or to a similar electrical control, so that the rotating movement of lever 70 cause switch 36 to move between driven and non-powered positions. Lever 70 maintains a operating relationship with switch 36, and in the preferred embodiment, the fork 74 is formed in the part of under the lever of switch 70, so that it can be received, swivel and movable, the free end of the lever articulated 38 of switch 36. As shown in the Figures 3 and 5, with actuator 42 in the outer position of no operated, the switch 70 lever is attached to the lever articulated 38 of switch 36, in the non-operated position. The plate 32 includes an opening 76, formed between the guide 54 and the plate 30, and which is generally aligned with lever 70.

Also, box 12 includes a flat divider 78, which has the necessary width to slide between the sides 18, and with a height normally equal to the sides 18. Appropriate slides 80 can be formed on sides 18 and in the bottom 18, for the sliding of the divider 78. It is also mounted a female electrical outlet 82 in the splitter 78. Also, to along the divider 78, an electric cord 84 extends, which includes proper protection against pulls. It is done inside of the channel 14, between the plate 30 and the divider 78, a connection correct electrical between switch 36, socket 82, and cord electric 84. And a dust cover 86 is put on, to close the upper opening of channel 14, between the plate 30 and the divider 78. A cord fastener 88 is placed in channel 14, on the side opposite to divisor 78, and not to divisor 28.

The mechanism 10 also includes a support 90, generally U-shaped, which in turn has a plate flat 92 at the top, and a first and second plate lateral 94, which normally go perpendicular, from the ends on the opposite side of plate 92. This plate has the width necessary to limit with the upper ends of the sides 18 and be equal to them, and extends from the bottom bottom wall 26 to plate 30. Side plates 94 are slid in the surfaces outside the sides 18, and the ends of the part of below are contiguous with the surfaces above the extensions 20. The ears 96 are formed entirely in the plates lateral 94. Appropriate measures are needed to fix, so movable, ears 96 to extensions 20, such as by example bolts that fix the ears 96, and that go along the appropriate openings, formed in extensions 20, with nuts screwed to the screws, and limiting with the opposite sides of extensions 20, and not with ears 96. It should be noted that dividers 28 and 78 and cover 86 are placed or slid in their site without using other forms of fixation, to facilitate the assembly, with the support fixing device 90, which limits with dividers 28 and 78 and cover 86 and preventing so disassemble, since they are located between the support 90 and the bottom 16 of channel 14.

The first and second parallel ears 98 are extend from the top surface of the support 90 in front of the sides 18, and between the plate 30 and the divider 78. A lever is mounted of drive 100 movably, relating it to the box 12, and specifically, so that it rotates between the ears 98, between the upper and lower ends, so that it moves between normal or idle position and drive position or deactivation. The lever 100 passes from the position of drive to normal position by a spring 102, which It is located between the lever 100 and the support 90, and located between the upper end of the lever 100 and the ears 98. A finger of drive 104 extends from the point adjacent to the end upper lever 100, and through opening 76, to engage with the articulated lever 38 and / or the lever of the switch 70 adjacent to fork 74. Finger 104 engages with lever 70 when switch 36 is in the operating position, and lever 100, in normal position. So, finger 104 is linked from the point of view of operation, to lever 100 and switch 36, to be able to deactivate the electric circuit when lever 100 is moved from normal position to drive position.

The upper and lower protuberances 106 are they are fixed to each side plate 94, and to the ears 96 They are also insured. In the most preferred form, the 106 bumps are shaped like rectangular parallelepipeds gaps, with open bottoms. Each bulge 106 has in turn an opening 108 and a rotating ear 110.

The mechanism 10 also has arms upper and lower drive 112 and 114, which are mounted rotating between the ears 110, on the axes that go parallel, but separated from the axis of the drive lever 100. Drive arms 112 and 114 are normally shaped of U, and each of them has an elongated central part 116, which extends parallel to the central axis of arms 112 and 114, as well as a first and second leg 118, which go perpendicular from the central part 116. The upper drive arm 112 has a contact tab 120, limiting with the upper end of lever 100 in normal position, and with legs 118, going from the normally parallel part 116, or a little higher at an angle, of the top plate 92. It should be noted that if one or both are pushed legs 118 of arm 112, the drive arm is rotated 112, so that the free ends of the legs 118 move towards the extensions 20, the contact tab 120 pushes the upper end of lever 100 towards plate 32, causing the lever 100 changes from the normal position to the position of drive Similarly, the lower drive arm 114 carries a contact tongue 122, adjacent to the end bottom of the lever 100 in normal position, and adjacent to the legs 118, extending from portion 116, generally parallel or slightly higher at an angle, from the top plate 92. It should be noted that if one or both legs are pushed, the drive arm 114, so that the free ends of the legs 118 move towards extensions 20, the tongue of contact 122 pushes the lower end of the lever 100 and the away from the plate 92, causing the lever 100 to change from normal position to the drive position. In the realization preferably, arms 112 and 114 have been constructed in a manner identical, to reduce manufacturing costs, and specifically it carries the contact tabs 120 and 122, being used only one of them, depending on whether the upper arm 112 or the lower arm 114.

The mechanism 10 also has a lid 124 movable in box 12, which has a large front wall surface. There are four bolts 126, extending from the surface behind the cover 124, in the places to slide in the openings 108 of the protuberances 106. In the embodiment preferably, bolts 126 have heads 128, formed in the free ends of the stems 130. These stems 130 have a transverse size equal to opening 108 for sliding in sliding, while heads 128 have a size cross section wider than openings 108. Each of the heads 128 contains a plurality of slots 132, spaced at circumference and extensible axis mode. These slots allow that heads 128 can be compressed to a size that allows passage through openings 108, but prevents At the same time, they can be removed after insertion. Cover 124, in the preferred embodiment, it moves from the support 90 by helical springs 134, located in bolts 126, between the back of the lid 124 and the front surface of the protrusions 106. Bolts 126 and springs 134 are arranged nonlinear way.

Four tabs 136 extend from the part back of the cover 124 to the corresponding points, so that limit with legs 118, separated from the central parts 116. Thus, the drive arms 112 and 114 are related, from the point of view of operation, with lever 100, and also with cover 124, when lever 100 moves from the position of rest to the deactivation position when any point of the large surface of the lid 124 moves, in the direction of actuation, from the normal position to the position of drive

In the most preferred form, the lid 124 carries a 138 circuit breaker that runs from the top end, extending around guide 54 of box 12. In that form, the back surface of the lid 124 carries a net of flanges 140. It should be noted that the flanges 140 increase the strength of the lid 124, making its thickness material formation possible reduced.

Preferably, the box 12 will be manufactured with metal or plastic sheets, as is normal for electrical switch boxes, the mechanism 10 being in the desired shape, usually made of plastic.

Since the construction details of the mechanism 10 have already been presented, will be offered the considerations on its mode of operation and advantages. As already mentioned above, the present invention comprises a safety mechanism in the form of a drive mechanism of electrical circuit 10, to facilitate circuit handling electric, such as those of propulsion engines or similar, normally used in mechanical tools. So, The present invention could be used in a wide variety of tools such as table saws, drilling presses, lathes, gluers and similar tools. The mechanism 10 is mounted on an appropriate place, close to the usual workplace of the operator, and the power is brought to box 12 through the cord electric 84. The power cord for the mechanical tool, or similarly, it is plugged into socket 82, and secured with the device clamping 88. Due to the solid construction of the box 12, and specifically of channel 14, its dividers 28 and 78 and the cover for powder 86, the interior defined by box 12, in the form preferred, comprises the electrical components of switch 36, jack 82, and the electrical connections between them and cord 84, and protects them from the environment, from, for example, sawdust and elements similar that may be in the air.

To start the engine, the operator must first open the mechanism 10, rotating the closure 62. Next, the operator must press the flat front 44 of the actuator 42, to change the switch 36 from the off position to the position on , in order to keep the circuit closed between the power supply and the motor being driven. It can be seen that the switch 36 is not actuated as a result of the movement of the lid 124.

Throughout the time, the machine can be operated with switch 36, upon activation of the electrical circuit. When the operator wishes to turn off the engine again, he can apply a force with his hand, although it is preferable to use another part of his anatomy, such as the thigh, knee or hip, on the wide front surface of the lid 124, in order to overcome the force of one or more helical springs 134 and force the cover 124 against one or more of the legs 118, of the arms 112 and / or 114. Thus, the depression of the cover 124 against the legs 118 It causes one or both arms 112 and 114 rotate, causing the switch 36 to move from the position on to off position. When switch 36 is in the off position, the electrical connection to the motor is broken, the motor being disconnected from the power source. When the cover 124 is released, the springs 134 return to their normal position, the springs 102 associated with the lever 100 being responsible for ensuring that the lever 100 and the arms 112 and 114 also return to their deactivation position.

It can therefore be seen that the deactivation of the electrical circuit can be carried out by pressing, in different ways, the cover 124. Specifically, in the preferred embodiment, since one or more bolts 126 can slide through the openings 108, corresponding to the support 90, against the tendency of the spring 134, the cover 124 is mounted so that it can be moved in correspondence with the box 12, making it possible for any point of the large surface of the cover 124 to move, in the driving direction , moving from the normal position to the activation position, the front wall being influenced and moving from the operating position to the normal position due to the springs 134. In particular, the lid 124 can be pushed so that the lid is moved 124 adjacent to the final upper wall 24, towards the box 12, causing the lid 124 to rotate on a parallel axis and adjacent to the final lower wall 26, similar to that presented a in US Patent 4,389,550. It can be seen that the parts of the cover adjacent to the side walls 22 are going to make a non-parallel movement in correspondence with the side walls 22. The movement of the cover 124 will cause the arm 112 to rotate, which in turn pushes the upper end of the lever 100 towards the box 12, thus causing the deactivation of the electrical circuit. However, unlike U.S. Patent 4,389,550, the lid 124 can be pressed toward the case 12 to move the lid 124 adjacent to the bottom bottom wall 26, causing the lid 124 to rotate on a parallel axis and adjacent to the top end wall 24. It can be seen that the parts of the cover 124 adjacent to the side walls 22 will perform a non-parallel movement in correspondence with the side walls 22. The movement of the cover 124 will cause the arm 114 to rotate, which, in turn , move the lower end of the lever 100 out of the box 12, thus deactivating the electrical circuit. In addition, unlike U.S. Patent 4,389,550, the lid 124 can be pressed to move the lid 124 adjacent to one of the two side walls 22 toward the case 12, causing the lid 124 to rotate on a parallel axis and adjacent to the other of the side walls. Thus, it can be verified that the parts of the lid 124 adjacent to the end walls 24 and 26 will move in a non-parallel manner, in correspondence with the end walls 24 and 26. Simultaneously, this movement of the lid 124 will rotate the arms 112 and 114, which in turn will move the lever 100, so that the upper end moves in the direction of the box 12, and the lower end moves away from the box 12, thus deactivating the electrical circuit. Also, and again unlike U.S. Patent 4,389,550, the lid 124 adjacent to the upper right corner can be pushed into the case 12, causing the lid 124 to rotate on an axis that extends between the left side wall 22 and the final wall 26. It can be seen that the remaining parts of the lid 124 will move, in a non-parallel manner, from the remaining parts of the box 12. The movement of the lid 124 will cause the right leg 118 of the arm 112 to be engaged, so that turn the arm 112, which in turn causes the upper end of the lever 100 to move toward the box 12, thus deactivating the electrical circuit. Similarly, it can cause the cover 124 to go the other adjacent corners to move, thereby the switch 36 on the position in the off position.

You can see that pressing with a part of the body other than the hand, either the thigh, the knee, or the hip, over lid 124, is not as precise movement as it would be with your hand, especially when you don't look at the cover 124, and even in emergency situations, where You want to act quickly. The mechanism 10 thus offers a substantial improvement over other mechanisms, including drive surfaces, which have been installed from swivel shape, using a type of hinged mounting, as in U.S. Patents 3,312,799; 4,166,202; and 4,389,550 with the ability to deactivate the electrical circuit quickly and firm. Also, the present invention means an improvement substantial with respect to other mechanisms, including surfaces of drive, which have been mounted without using hinges, as in US Patent 3,233,071. Specifically, sayings mechanisms were not consistent when causing the drive of the switch. For example, in some circumstances, the surface, before the switch was activated, would have touched background when hitting other parts of the mechanism. In addition, it would take that the surface will make a long journey, especially when pressed in the corner, before operating the switch, and likewise, great strength was required in these circumstances, especially if a typical type of switch is used on off. Therefore, mechanism 10 is a novelty unique in design, compared to previous mechanisms, such as that shown in US Patent 3,233,071. Specifically, lever 100 and arms 112 and 114 are used in such a way that the path that cover 124 makes is minimized, and the amount of force needed to press lid 124 and operate switch 36. But even more important, is that the use of the lever 100 and arms 112 and 114 allow a switch 36 of the on / off type in a practical way and plausible. It should be noted that lever 100 and arms 112 and 114 they allow different movements of the lid 124 to actuate the switch 36, especially if the movement takes place in the corners of the mechanism 10, which in the preferred embodiment, has the shape of a normal straight parallelepiped. So, effectively the mechanism 10 eliminates the possibility that by pressing on the lid 124 does not actuate switch 36, causing it to deactivate the electrical circuit. It also overcomes the disadvantages and limitations of previous mechanisms, including, but not exclusively, the types presented in the patents Americans 3,233,071; 3,312,799; 4,166,202; and 4,389,550.

To close the mechanism 100 drive, and thus prevent the mechanical tool from being used without authorization, the operator will turn the key of the lock 62, which prevents the actuator 42 slips and the key is removed.

Almost any accidental operation of the switch 36 is eliminated, by making the front 44 relatively small, and by placing the front 44 in a hollow behind the central surface of the cover 124. It should be noted that the actuator 42 can be placed in other positions in the box 12, or other modes can be used to activate the electrical circuit, provided there is no change of the off position of the switch 36, or the activation of the circuit, as a result of the movement of the cover 124. Once the switch 36 is actuated to turn on the machine, the operator does not need to look for the shutdown switch, since the application of a force at any point of the cover 124 serves to turn off the machine.

It is remarkable, therefore, the fact that the lid 124, formed by walls that define a sleeve which fits inside walls 22, 24, and 26, it has advantages, since It makes it harder for it to disassemble. Specifically, if the lid 124 will fit out of box 12, as the patent reveals U.S. 3,233,071, the rear ends of the deck could be easily fixed on the outside, to release the lid of the box, this being easy to bend the result that an object accidentally snaps at the ends later, or simply, when pressed by the fingers of some Vandal, which would be a major problem in environments such as A school or similar. Thanks to the creation of mechanism 10, to disassemble it is necessary to remove the device from fixing bracket 90 of extensions 20, allowing access to heads 128, which is a lot of time, and it is also very difficult to do especially when mechanism 10 is mounted in the workplace.

An alternative form of the mechanism of electric circuit drive 10, in accordance with the present invention is the one shown in Figures 6 and 7, in which It includes a 12 'box. This 12 'box has a rod 14 and its bottom 16, sides 18 and end walls 24 'and 26', which extend completely, generally, perpendicular between the sides 18, besides having the same height as these. The final wall 26 ' it has socket 82 and pull protection for cord 84.  The final wall 25 'also carries a first and second groove 150, formed adjacent to its top end, and spaced apart from each other. The spacers 152 are formed in the channel 14, on the sides 18 adjacent and parallel to the final wall 24 ', and separated from the wall  final 26 ', and also its height is less than the height of the sides 18. Divider 28 has the size necessary to slide in sliding in channel 14, and is the height of plate 30, being generally the same as that of the separators 152, so that when plate 30 slides on slides 34, plate 32 is normally extends parallel to the bottom 16. Plate 32 It has openings 154, which are generally aligned with separators 152.

The mechanism 10 also includes a support 90 ', which normally has a flat top plate 92', the same size generally, to be contiguous to the ends upper sides 18, and walls 24 'and 26' of channel 14.  The ears 156 are formed entirely with the surface bottom of the top plate 92 ', to fit the grooves 150 of channel 14 and also interconnect support 90 'with the channel 14, so that it can slide and remove. Plate 92 ' it also has openings 158, normally aligned with the separators 152, but of size substantially larger than that of the openings 154. The ears 162 are formed with the upper surface of the top plate 92 ', normally opposite to the ears 156. The ears 162 are formed with the upper surface of the plate top 92 ', adjacent but separated from the final wall 26'. The slots 164 are located along the top plate 92 ' adjacent but separate from divider 28.

The support 90 'also has a frame 166 formed separately from the top plate 92 ', and which includes protrusions 105, with openings 108 for sliding in Sliding rod 130 of lid 124, swivel ears 110 for actuator arms 112 and 114 and swivel ears 98 for lever 100, all according to the type of mechanism 10 presented in Figures 1-5. Lower end of frame 166 has a tab168 which slides in the ears 162. The upper end of frame 166 also has hooks 170 to fit the slots 164 when the tab is inserted 168 on the ears 162. Thus, frame 166 is interconnected, although removable, or fixed to the plate 92 'by means of its sliding between the ears 162, the flange 168, the slots 164 and hooks 170, and especially, without the use of screws, threads or any other type or form of fixation. In this embodiment preferably, actuator lever 100, arms 112 and 114, springs 102 and 134, and cover 124 are fastened to frame 166 before to fix them to the top plate 92 ', and before placing the support 90 on channel 14. It can thus be seen that the support can be removed 90 'of plate 92' by moving hooks 170 from the bottom of the lower surface of the plate 92, so that they pass to through slots 164, thus having access to heads 128, once support 90 has been removed from the top plate 92 '.

The box 12 also has a lid 172, which has an annular collar 174 to collide with the plate 92 ', opposite to the end wall 26' and to the sides 18, and of the size necessary to slide the cap 124, so that cap 124 fits on collar 174, similar to how cap 124 fits within walls 22, 24 and 26 in Figures 1-5. The lower end of the collar 174 has slots 176 for sliding the ears 160 of the support 90 'in a sliding way, so as to interconnect the cover 172 with the support 90' in a removable and sliding way. A U-shaped plate 178 extends from the upper end of the collar 174, to rest on the plate 92 'of the support 90'. A U-shaped actuator guide 54 'goes from the plate 178, its upper end being adjacent in the direction parallel to the actuator movement or direction 42, and extending completely from the collar 174. The guide 54' has a size and necessary way to slide the front 44 of the actuator 42 in sliding. In the preferred embodiment, the first and second part of the guide 54 'on the sides opposite the actuator 42, have openings 180, which are aligned with the openings 182, formed on the legs 46 of the actuator 42, in the off position, the openings 180 and 182 extending not parallel, but preferably perpendicular to the actuation or direction of movement of the actuator 42. Therefore, an elongated lock of a padlock can be inserted conventional 184, related to the guide 54 'of the box 12', through the openings 180 and 182, so as to prevent the actuator 42 from moving from the position off

Plate 178 carries 186 plugs, usually aligned with spacers 152, and of a size that allows sliding in slides at openings 158, although larger than the openings 154, so that the plugs 186 rest on the plate 32. Screws 188 pass through plugs 186 and openings 158 and 154, and slide so that they are skewered in the separators 152, to fix together channel 14, support 90 'and the cover 172, in a position separated from the lower ends of support 90 ', of cover 172 and of channel 14 and of the final wall 26 '. The screw heads 188 are placed in the sockets 186, its extension being generally similar or slightly less than the outer surface of the plate 178. It should therefore be noted whose plate 92 'is located between the means of the lid 172, against the top end of channel 14, and that in channel 14 the divider 28 is located between plate means 92 ', and that the plate 32 is between the plugs 186, against the spacers 152. In the preferred embodiment, the cover 172 has an edge member 190, which extends from its outer periphery and on the outer periphery of the plate 92 'and the upper parts from the outer periphery of channel 14.

The handling of the mechanism 10 as it appears in Figures 6 and 7 is basically the same as that of the mechanism 10 presented in Figures 1-5. However, the actuator 42 is put into the off position, avoiding to change into the position on thanks to a closure lock 184 which goes through the openings 180 and 182, and thus prevents movement of the legs 46 of the guide 54 '. To start the engine, the operator must first remove the lock of the padlock 184 from the openings 180 and 182. Once this is done, the operator can now press the flat front 44 of the actuator 42, to move the switch 36 from the position in the off position on, and thus keep the circuit closed between the current and the motor being driving. It can thus be seen that the actuation of the switch 36 and the activation of the circuit do not take place as a result of the movement of the lid 124.

Also notable is the fact that the box 12 ' It has important advantages, since the different components fit quickly or slide into position and it fixed only with two 188 screws. Specifically, after placing correctly the drive lever 100, you can place the actuator arms 112 and 114, spring 102 of frame 166 and the springs 134 in bolts 126 of cover 124, and heads 124, to through the openings 103, to fix the cover 124, the lever 100, arms 112 and 114, and springs 102 and 134 to frame 166. In at this time, tab 168 slides on ears 162, and the hooks 170 are placed in slots 164 to fix frame 166, and all other components thus fixed to the plate 92 '. Now and once the divider 28 and all other components so fixed have been placed in channel 14, ears 156 are inserted in the slots 150, and the plate 92 'is rotated on an axis therefor defined, to limit with the upper ends of channel 14. Then, slots 176 can be inserted to heads 160, and the cover 172 is rotated on an axis thus defined, to limit with plate 92 'of support 90'. Then, the screws 188 through plugs 186 and openings 158 and 154, and are strung in spacers 152, so as to prevent that the cover 172 rotate on the axis defined by the ears 160 and the slots 176, and the different ones are also prevented from separating mechanism components 10.

It should be noted that frame 166 can be fixed plate 92 'of support 90' in other ways. For example, you can removably fix to plate 92 ', sliding on plate 92 ', in a plane parallel to the plate 92', and in the arranged ears U-shaped, and subject to this position by a piece in the form of hook or retainer. Once frame 166 is in place, the actuator lever 100, actuator arms 112 and 114, and the spring 102 can be placed in frame 166. Immediately afterwards, cover 124, with the springs 134 in their correct position. It can be seen that after this assembly, access to heads 128 cannot be easy, making that disassembling it is difficult, if not impossible, of perform without damage.

Numerous extensions or variations will be obvious for those who have common experience in the art. For example, although in the preferred embodiment, a single switch is used to both activate and deactivate the electrical circuit, it It could be activated or deactivated separately. In this sense, it could provide a second switch 142, which shown in transparent view in Figures 3 and 5, for Turn off the electrical circuit. Thus, switch 142 could operated by a protuberance 144, formed in the lever of switch 70, as shown and / or be fixed to the finger of drive 104. Similarly, switches 36 and / or 142 they could be of the momentary type, the switch 142 being shown in the preferred embodiment of this type.

Similarly, although in the realization the socket 82 and cord 84 are installed in the divider 78 or in the final wall 26 ', the latter could carry blind holes to pass power lines, so that switches 142 and / or 36, or other electrical controls that are put in the mechanism 10 can be directly connected with The power supply and mechanical tool, or machine similar that is being handled.

In addition, although, in the preferred embodiment, cover 124 is mounted, so that it is movable, in the box 12, by a multiplicity of bolts 126, which slide to through openings 108, and putting springs 134 between the lid 124 and box 12, there are other ways of mounting, also in shape removable, lid 124 in box 12, which make it possible for any point on the large surface moves in the direction of actuation, as for example, although it is not the only way, by springs or other bypass elements, spaced apart from bolts 126, or according to the construction shown in the U.S. Patent 5,510,587, or in other constructions Similar.

Claims (18)

1. Mechanism for operating an electrical circuit with a frame (12, 12 '), a front wall (124) having a wide, medium surface (108, 126, 134) for mounting the front wall (124) in relation with the box (12, 12 '), so that a displacement occurs between the normal position and the operating position, the front wall (124) being derived from the operating position to the normal position, a switch (36) mounted on the box (12, 12 '), and an actuation element (100) mounted in the box (12, 12') for the displacement between the rest position and the deactivation position, the actuation element (100) being derived from its deactivation position to the rest position, the actuating element (100) being related from the point of view of the switch operation to deactivate the electrical circuit, when the actuating element (100) passes from the resting position to the deactivation position, not having l play the activation of the electrical circuit as a result of the movement of the front wall (124); characterized in that the mounting means of the front wall allows any point of the wide surface to be moved in a driving direction, from the normal position to the driving position; and by means (112, 114) with a mobility operating relationship between the drive element (100) and the front wall (124), to move the drive element (100) from the rest position to the position of deactivation, when any point on the wide surface is moved in the drive direction from the normal position to the drive position. 2. The circuit drive mechanism electric according to claim 1, wherein the box (12, 12 ') it comprises a channel (14), with first and second flat sides (18), extending from the bottom (16); and a first divisor (28) slid between the first and second sides planes (18), and resting on the bottom (16) of the channel (14), the switch being mounted on the first divider (28). 3. The circuit drive mechanism electric according to claim 2, wherein the first divider (28) extends from the first and second side planes (18) parallel to the bottom (16) of the channel (14); and in which the mechanism of electric circuit drive also comprises an actuator (42) movably mounted on the first divider (28), for its displacement between a driven position and a non-position actuated, terminating the actuator (42) in the channel (14); and a medium (70) mounted on the first divider (28) for displacement with the actuator (42), to activate the electrical circuit when the actuator moves from the non-driven position to the position powered. 4. The circuit drive mechanism electric according to any of the preceding claims, in which the drive element (100) is mounted in the box (12, 12 ') for the rotational movement on the axis of rotation between the rest position and deactivation position; and in which the drive element travel means (112, 114) rotates the drive element (100) when any point of the wide surface moves in the direction of drive 5. The circuit drive mechanism electric according to any of the preceding claims, in which the drive element (100) is mounted so rotating in the box (12, 12 '), between a first and a second end, moving the first end towards the box (12, 12 '), and the second end moving away from the box (12, 12 '), when it is done turn the drive element (100) from the rest position to The deactivation position. 6. The circuit drive mechanism electric according to any of the preceding claims, in which means of movement of the drive element it comprises a first and second drive arm (112, 114), swivel mounted on the box (12, 12 ') on shafts spaced, each of the drive arms (112, 114) counting on a first and second leg (118), which extend from there to fit the front wall (124) and a contact tab (122) to fit the element of drive (100). 7. The electric circuit drive mechanism according to any one of claims 3 to claim 6, further comprising a closure (184), to prevent the actuator (42) from sliding from the non-operated position, characterized by an actuator opening (182), in the actuator (42), extending not parallel to the direction of sliding drive; a box opening (180), formed in the box (12 ') aligned with the actuator opening (182), when the actuator (42) is in the non-actuated position, the closure (184) sliding movably in the actuator and case openings (180, 182), when the actuator (42) is in the non-actuated position, the actuator (42) being free to slide when the closure (184) is removed from the actuator openings and the box (180, 182). 8. The mechanism according to claim 7, in the that the actuator (42) is generally U-shaped, having a front (44) and a first and second leg (46), extending in a parallel relationship spaced from the front (44), with the opening of the actuator (182) extending through the first and second actuator leg 9. The mechanism according to claim 7 and 8, in which the box (12 ') includes a guide (54'), with a first and second part on sides opposite the actuator (42), and extending  in a direction parallel to the drive direction sliding, extending the opening of the box (180) through The first and second part. The mechanism according to any of the preceding claims, wherein the box (12 ') comprises a channel (14) with a first and second side (18), extending from the bottom (16), and at least a first wall end (26 '), a support (90') with a lower end and being of the size necessary to collide with the channel (14), means for providing a removable interconnection between the support (90 ') and the channel (14 ), a collar (174) of the size necessary to receive in a sliding manner the front wall (124), a means for fixing together the channel (14) and the support (90 '), in a spaced position of the lower ends and the first final wall (26 '); characterized by a cover (172) with a lower end and a collar (174); wherein the means for providing a removable interconnection between the support (90 ') and the channel (14) offers a removable sliding interconnection between the lower end of the support (90') and the first end wall (26 '); and in the middle (160, 176) to provide a removable sliding interconnection between the lower ends of the cover (172) and the support (90 '), and in which the fixing means (188) together secure the channel (14 ), to the support (90 ') and to the cover (172). 11. The mechanism according to claim 10, in which the fixing means comprises, at least a first separator (152) formed in the channel (14) spacing the first end wall (26 '); a first opening (158) formed in the support (90 '); a first opening (186) formed in the lid (172); a closure (188) extending from the first opening (158, 186) and fixed to the separator (152). 12. The mechanism according to claim 10 or 11, in which the means to provide a sliding interconnection removable between the lower end of the support (90 ') and the first final wall (26 ') comprises at least one first ear (156) formed in an element between one of the supports (90 ') and the first final wall (26 '); and a groove (150) for sliding in sliding of the first ear (156), formed in the other element, between the support (90 ') and the first end wall (26'). 13. The mechanism according to any of the claims 10 to 12, wherein the means for providing a removable sliding interconnection between the lower ends of the support (90 ') and the cover (172) comprises at least a first ear (160) formed in one of the elements between the support (90 ') and the cover (172); and a groove (176) for sliding in sliding of the first ear (160) formed in the other element, between the support (90 ') and the cover (172). 14. The mechanism according to any of the claims 10 to 13, wherein the support (90 ') comprises a top plate (92 ') and a frame (166), formed separately from the upper plate (92 ') and interconnected to the plate (92') by a sliding adjustment movement, without other forms of fixing, the front wall (124) being mounted movably in the frame (166). 15. The circuit drive mechanism electric according to claim 2, wherein the box (12), in addition, it comprises, in combination: a cover (86) extending between the first and second side (18) of the channel (14); a support (90), the front wall (124) being movably mounted on the support (90), the drive element (100) mounted so movable in the support (90); and the means for fixing the support (90) relative to the channel (14) between the cover (86), against the first and second side (18) of the channel (14). 16. The circuit drive mechanism electric according to claim 15, wherein the mounting means movable comprises, in combination: a multiplicity of springs helicals (134) that are arranged non-linearly and located between the support (90) and the front wall (124); and one multiplicity of bolts (130) extending from the front wall (124) and sliding in the openings (108) formed in the support (90), the coil springs (134) being placed around bolts (130). 17. The circuit drive mechanism electric according to any of the preceding claims, in which the drive element (100) is derived by a spring (102), extending between the drive element and the housing (12, 12 '). 18. The circuit drive mechanism electric according to any of the preceding claims, further comprising, in combination: a second switch (142) mounted on the box (12, 12 '), deactivating the first switch (36) the electrical circuit when the front wall (124) moves  in the drive direction, activating the second switch (142) the electrical circuit.