DE2461395A1 - KEY ACTUATED LOCKING DEVICE FOR FUNCTION BUTTONS - Google Patents

Description

Victor Comptometer Corporation 3900 North Rockwell Ave.

Chicago, 111. 60618 U. S * A.

"Key operated locking device for

function keys "

The present invention relates to an improved one Lock for function keys on office and booking ' machines and in particular on cash registers.

Keylockable locking devices for, function keys were created to selectively different To enable operating modes: key actuation by pressing

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in the unlocked state of the button or momentary switch actuation; Switches only close when locked; and closed or open switch in the locked state. As an example, Davis et al. issued U.S. Patent No. 3 026 385 "push button operator with Locking Means ".

Known devices of this type are often characterized by a complicated construction and make use of Parts that are difficult and expensive to manufacture.

The present invention provides an improved, reliable locking device of simplified construction which can be manufactured at a lower cost than known locking devices. In the context of the present invention, one or more key-operated locking devices are used for puncture buttons, the locking devices comprising pressed, easily and inexpensively manufactured plastic parts for mounting, which are made in one piece with a plurality of cylindrical linings. These box-like panels consist of separate upper and lower intermeshing _s wall portions for receiving a -betätigten with a key cylinder lock roller, which consists of an outer position with a locked button in an inner position with depressible key

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can be transferred. The arrangement also includes devices for switch actuation in every housing-like cladding, which can be pressed down by the cylinder roller in its unlocked state and thereby by a upper rest position can be transferred to a lower position with possible switch actuation, the devices to operate the switch are held in the lower position by screwing the cylinder roller into the Position to operate the switch. Considerable savings compared to known, separately mounted switches with complicated, Custom-made parts can be achieved by simplifying those in the present invention parts used, especially when several cylindrical panels are integral with support and mounting parts be molded from plastic.

An important object of the present invention is to provide a snap lock device for puncture buttons create, which consists of a two-part cylindrical, acting as a casing housing, both parts of which are integrally formed with a simple and inexpensive to manufacture holder made of molded plastic '. -

Numerous other objects and advantages of the present invention will become apparent from the following description of one preferred embodiment with reference to -die accompanying drawings is explained.

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Figure 1 is a perspective view of a preferred Embodiment of the lock according to the invention for function keys and shows two locks in different Positions.

Figure 2 is an exploded perspective view View of the parts of a lock shown in FIG.

Figure 3 is a side elevation of one of the lock in the locked position in which the keys are not moved can; to clarify the representation, parts are cut open and shown in cross section.

FIG. 4 is a cross-section through the upper end of the cylindrical casing of one of the lock along the line in FIG Figure 3 with 4-4 designated line.

Finally, FIG. 5 is a cross section through a lock along the line denoted by 5-5 in FIG.

In the preferred embodiment of the invention shown in FIGS. 1-3, the arrangement 10 comprises Locking devices several switch units 11, two of which are shown in FIG. Each switch unit consists from a favorable injection-molded hollow cylindrical casing 12 made of plastic, which is in one piece is connected to a horizontal support plate 13 or another suitable fastening device. The top or outer end of the cladding 12 ends in an upstanding flange that has a circular opening for a

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a key-operated cylinder lock 17 surrounds. In one piece with the upper support plate 13 are also various Holders executed, so the vertically downwardly extending pins 18, the threaded holes at their lower ends for screws 19 have. With these screws, a lower horizontal support plate 21 or another suitable inside bracket to be attached. In the lower support plate are screw holes 22 and a central opening 23 (Figure 2) attached. Each cylindrical fairing 12 further includes an integral therewith, downward paddling 24, as well as an upright wall 26 which is made in one piece with carrier plate 21 and which cooperates with cladding sections 12, 24 and creates a hollow cylindrical housing when the two support plates 13 and 21 are connected to each other by pins 18 and Screws 19 are connected. An indentation 27 is provided in the cylindrical housing, which is formed by a recess in Wall 24 and the lower wall portion 26 is formed. An expediently one piece with the lower cladding section formed projection 28 protrudes from the side into indentation 27. As can be seen from FIGS. 1 and 3, projection 28 separates an upper slot 29 from a lower slot 31 in recess 27. The upper slot is in FIG Circumferential direction longer than the lower slot 31 »as further described in detail below.

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Each cylinder lock 17 which can be locked with a key consists of a roller, known per se, which can be rotated in the cylindrical housing and which can be rotated back and forth between a locked position and an unlocked position. In the top of each cylinder roller 17 there is a slot 32 for inserting a key 33; Several outwardly extending locking cams 34 (FIG. 2) are arranged on the cylinder roller in a manner known per se, the locking cams being withdrawn when the correct key is inserted into the slot so that they do not protrude beyond the outer surface of the cylinder roller. As can also be seen from the horizontal cross-section through the upper end of a cylinder roller along the line denoted by 4-4 in FIG on the cylinder ^{roller 17 -} serve when the key 33 is pulled out of the slot 32. After inserting the key, the cylinder roller in the opening 16 can be turned.

Each switch unit 11 has a locking plate 38 (FIGS. 2, 3 and 5) with a plate attached to the underside of the corresponding cylindrical roller. A screw 39 fits into a through hole 4I in the locking plate (Figure 2) and can be screwed into a hole 42 which is in a

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is provided from the cylinder roller dispensing nozzle. Am alignment pin 43 attached to the cylinder shaft fits into a hole 44 in the locking plate. Each locking plate 38 is provided with a laterally projecting rabbit 46 which protrudes into the indentation 27 of the cylinder housing.

In addition, the indexing fineness 11 includes a push-button piston 47 (Figures 2 and 3) with a plunger 48 and one in one piece thus formed flange 49, the. is located under locking plate 38 and can come into engagement with her. Everyone A contact button 51 is attached to push-button plunger 47 which engages a pressure-responsive membrane switch 52 (Figure 3). or any other suitable switch as in copending filed September 15, 1972 U.S. patent application serial no. 289,449. The description of this US patent application is referred to in this application is expressly incorporated by reference.

Push-button plunger 47 is hollow inside, around an inner cavity 53 to create. Furthermore, the piston is perforated laterally so that opposing edges 54 are formed. In the interior of the plunger 48, the contact button 51 can slide, its upwardly extending, opposing projections 56 are provided with outwardly protruding rabbits 57. Rabbits 57 jump into those attached to the wall of the piston Openings. A spiral spring 58 is arranged in each tappet 48 so that the upper end of the spring rests against the tappet, while

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rend presses the lower end against the contact button 51. The object of the spring 58, it is usually ₀ to keep the contact button 51 in the embodiment shown in the figures pushed-out position in which the lugs 57 abut the edges 54th When the push-button piston 47 is pressed down from the position shown in FIG. 3, the contact button 51 is pressed downwards via spring 58 and thereby closes the associated switch 52 The piston only moves relative to the contact button, which is held in the contact-making position by spring 58.

A compression spring 59 mounted in the cylindrical housing exerts pressure on the associated pushbutton piston 471 Lock plate 38 and the cylinder roller 17 upwards. The indentation 27 (Figure 1) on the panels is in the vertical direction of a horizontal edge 61 (Figures 1 and 2) of the lower wall 26 and a horizontal edge 62 of the upper flange portion 24 is defined. The spring 59 normally pushes the push button piston 47 »the locking plate 38 and the cylinder roller 17 upwards until the surface of the nose 46 abuts the horizontal edge 62. As previously

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mentioned, the cylinder roller 17 can be rotated in the cylindrical casing after the insertion of a key 33 are from a locked position in which the switch cannot be operated to an unlocked position in which the push-button switch can be operated «The locked position of the cylinder roller 17 corresponds to a position of the Nose 46 on locking plate 38 on the left side of recess 27, the locking plate rests in the upper slot, as shown in the right lock of FIG. 1 and in FIG. The nose 46 is in the unlocked position of the cylinder roller located at the right end of the indentation 27 and does not come into contact with the projection 28, as in the left lock in FIG. 1 shown. Each push-button piston can be moved in the axial direction in the cylindrical casing 12 are moved by hand against the compressive force exerted by the spring 59 by the associated,. Cylinder roller 17 is moved downwards in the unlocked position. The push-button piston 47 is thereby from an upper or outer position, in which the contact button 51 does not touch the membrane switch 52, in a lower or Moved inner position for switch actuation, in which the contact button closes the switch and rests against it when the movement of the nose 46 in front of it in the axial direction takes place on the right-hand side of the indentation 27. Every feather 59 normally presses the upper surface of the nose 46 against the horizontal edge 62 (FIGS. 1 and 2) when the upper

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Position in which the switch is ineffective, assumed is. Each push-button piston can be moved axially to the lower position with a switch, when the cylinder roller is unlocked. The plunger can be pressed down until the lower surface of the nose 46 meets the horizontal edge 61 of the lower wall section 26 touched. In this lower position, a rotation of the cylinder roller 17 into the latching position is possible because then the lower slot 31 receives the nose 46, which then holds the roller and the piston in this position. Figure 3 shows the Push-button piston 47 of a switch unit 11 in the upper locked position. The nose 46 of the locking plate 38 is located via projection 28 in upper slot 29, whereby the contact button is spatially separated from membrane switch 52. Pistons 47 can only be transferred to the lower position with the following actuation of the switch if the associated shutter roller 17 has been unlocked and moved into the position shown on the left-hand side of FIG. Piston 47 is either in the upper position, in which the switch cannot be operated, or in the lower position with a possible Switch actuation engages by engaging the cylinder roller accordingly.

As previously mentioned, the upper slot 29 is each cylindrical Covering longer than "the lower one in the circumferential direction Slot 31. The opposite indentations

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of the inner projection 36 on the upstanding flange H (see FIG. 4) take the locking cams 34 of a cylinder roller 17 and are mounted within the inner protrusion 36. The position of the cheeses 46 thus corresponds to the locking plate 38 in the upper slot 29, i.e. on the left side of the indentation 27 (bar division of the right locking device in Figure 1 and the locking device in FIG. 3) »the complete outward expansion of the locking cams 34 and their insertion in indentations 37. Here, the key can be inserted and removed again. When a cylinder roller 17 is latched in the lower position, with nose 46 under projection 28 in the lower slot 31, the locking cams are 34 of the cylinder roller 17 are not opposite the indentations 37 and cannot be extended into the same so that the key cannot be removed from the cylinder barrel. This becomes an unintentional The key 33 is prevented from being pulled out of the cylinder roller 17 when the associated switch 52 is closed.

As can be seen from Figure 5, are on the wall 24 of cylindrical casing two separate, longitudinally extending recesses 63 and 64 attached to one Lock plate 38 attached projection 66 receive when the Cylinder roller 17 has been rotated into the locked or unlocked position. On each locking plate 38 is a spring device with one on the circumference opposite the projection 66

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Attached curved groove 67 provided «to snap into place of the projection 66 in one of the recesses 63, 64- to enable.

The present invention and many of its advantages are apparent from the foregoing description; Changes in shape, design and construction that are immediately understandable to experts. Arrangement of! Parts possible within the scope of the invention, of which only one preferred embodiment is described mirde and oils to their full extent by the following Claims is defined ..

Claims (8)

PAIES T CLAIMS V Iy Key-operated locking device for function keys, characterized by an outer holder (13) with a plurality of hollow, upper ones made in one piece with it Cladding sections (H), a separate inner holder (21) with several upright ones made in one piece with it lower fairings (26); Means for connecting the upper and lower sections, which interlockingly form a hollow, cylindrical fairing result; a recess created by suitable shaping of the associated sections (27) in the fairing after the sections have been joined; one operated with a key (33) in the upper casing section mounted cylinder lock roller (17), which back and forth between a locked position and an unlocked position can be turned around; one on the cylinder lock roller (17) Attached locking plate (38) which, by engaging in the recess (27), the rotational movement of the roller (17) and its Limited movement in the longitudinal direction of the associated cladding section; and one of a spring (59) upwards pressed, a switch (52) actuating, mounted in the paneling push button piston (47), the lower End (51) extends down through the inner bracket, with an inward movement of the cylinder roller in its longitudinal direction in the unlocked state presses down the piston which actuates the switch. 509833/0557 -H- 2. Key operated locking device according to claim 1, characterized in that the holder (13, 21) and the trim panel (14, 24, 26) made of plastic - are shaped. . · · 3. Key operated locking device according to claim 1, characterized in that as a means for connecting and securing the inner and outer panel sections multiple vertical ones integral with one of the brackets executed pins (18) are used. 4. Key operated locking device according to claim 1, characterized in that one of the two associated The cladding sections are designed so that a projection (28) protruding horizontally into the recess (27) arises, which in cooperation with the locking plate (38) a displacement of the cylinder roller (17) in the longitudinal direction locked state prevented. 5. Key operated locking device according to claim 4, characterized in that on each locking plate (38) a lug (46) made in one piece with it is attached and that the projection (28) is part of the associated Recess (27) divided into an upper slot (29) and a lower slot (31), the slots for receiving the The nose (46) on the locking plate is used in the outer or inner locking position. 6. Key operated locking device according to claim 5, characterized in that each upper slot 509833/0557 (29) is longer than each lower slot (31) in order to prevent the rotation of the cylinder roller (17) into an inoperative locking position enable a key (33) assigned to the cylinder roller (17) to be inserted into the cylinder roller or to it can be taken. 7. Key operated locking device for function keys according to claim 1, characterized in that each panel (12) has two separate, longitudinally extending depressions, the locked or the correspond to unlocked position, and that each locking plate (38) cooperates with a spring (59) and a nose (57), to snap into the recesses in the associated panel. 8. Key operated locking device for function keys according to claim 1, characterized in that each locking plate (38) cooperating with the cladding (12) a delimitation of the inner, longitudinally extending Movement of the cylinder lock roller (17) results, and that each piston arrangement for operating the switch consists of: an upper, hollow piston (47), a contact button which can be moved downward to a limited extent and extends from the piston (47) (51) and a spring (58) attached in between, which presses the contact button (51) into the relaxed position, whereby on a switch (52) attached under the contact button only the maximum force from the assigned spring (59) SQ9833 / 0S57 generated force can be applied, which occurs during the inward movement of the cylinder roller (17). 9 · Key-operated locking device, characterized by an outer holder in one piece with a with it executed upper, cylindrical cladding section (14) j an inner holder with a one-piece with its executed lower garment section (24); Means for connecting the two clothing sections to form a cylindrical housing, adjacent clothing sections, which are shaped in such a way that a recess (27) is formed after the sections have been joined; one in the upper Cladding section mounted cylinder lock roller (17) »which can be rotated between locked and unlocked positions; a locking plate (38) attached to the cylinder lock roller (17) which, in cooperation with the recess (27), controls the rotary movement and limited longitudinal movement of the cylinder roller (17) with respect to the fairing; and one by a feather Pushed up piston (47) mounted in the casing to operate the switch, its lower end through downwards the inner bracket extends thereby causing the inward, longitudinal movement of the cylinder roller (17) in the unlocked position leads to the depression of the piston (47) which actuates the switch (52). 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