DE2035663A1 - Switching device - Google Patents

Description

Patent attorneys Dipl.-1 ng. A. Grünecker

lipl.-lng. A. Grunecker ij ι

Dr.-Ing. H. Kinkeldey 'f. Ju // J97fl

Dr.-Ing. W. Stockma / r Munich 22, Maximilianstr. 43

PH 3591 July 17, 1970

Canon Kabushiki Kaisha,

30-2, 3-chonie, Shimomaruko, Oiita-ku, Tokyo ^ Japan

Switching device:

The invention relates to a switching device and on the arrangement of such switching devices.

A vibrating spring switch is often used as an input device for an electronic calculating machine or the like. Such an oscillating spring switch consists of a glass tube, which is airtight a chemischtra ^ os gas and a pair of magnetically or electrically conductive oscillating springs (hereinafter referred to as "oscillating springs" al3) which

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are partially arranged overlapping to serve as a contact means. The oscillating springs are also elastic.

Such oscillating springs are usually open; if but a magnetic field is applied by bringing a magnet close, the pair of becomes electrically conductive Oscillating springs strongly exposed to the flux of lines of force of the magnet, so that the contact parts of the oscillating springs caused to bring each other into contact and to establish an electrical connection between them. If the external magnetic field weakens, e.g. if the magnet is moved away from the oscillating springs, the density of the line of force flow acting on the contact means to reduce, the contact parts are opened and electrically isolated from each other.

In practice, a permanent magnet is usually used as the source of such a magnetic field. In a known arrangement of the magnet with regard to the oscillating spring switch of the type described, the magnet is arranged parallel to the direction of an axis of the oscillating spring switch or to the direction of extension of the oscillating springs, the direction of the magnet being determined by the opposite poles. With such an arrangement, the magnet is moved axially to the oscillating spring switch in order to influence it, so that the contact parts of the oscillating spring switch are subjected to a greater density of the flux of lines of force

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are closed by the magnet when the magnet with respect to the ^D is set with chwingfedersch8.1ters .IG!, and that the connection is opened when the magnet comes off from the contact parts.

In another known arrangement, the magnet is in the usual direction to the main axis of the oscillating spring switch or attached to the direction of the extension of the springs of the oscillating spring switch. This is where the magnet becomes also moved axially to the oscillating spring switch in order to influence it, so that the contacts of the oscillating spring switch are caused to attract each other and closed by a greater density of the flux of lines of force when the magnet comes closer to one of the two springs (or when the magnet moves away from the contacts comes off), and that the contacts are opened when the magnet is aligned with respect to the contact means is.

As stated earlier, the magnet is used to influence of the oscillating spring switch moves along its main axis. Usually the magnet is immediately next to the push button connected and attached. For this reason, the oscillating spring switch be attached vertically to the keypad, which has led to a greater height of the keypad.

Accordingly, the switching device is described in the above

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benen execution incompatible with the growing demand after the compact construction of electronic calculating machines, in particular desktop calculating machines.

The object of the invention is to provide a switching device and to provide an arrangement thereof which can reduce the size or height of the keypad.

It is an object of the invention to provide a switching device which controls the movement distance of the magnet can shorten the spring switch, especially the stroke of the pushbutton.

Yet another object of the invention is to provide a switching device in which the magnets in a plurality are moved at right angles to the main axis of the oscillating spring switch to cause its actuation.

^ Furthermore, it is an object of the invention to provide a convenient to

provision of such switching devices.

The stated object is achieved according to the invention by a pushbutton which can be brought into the working position by an externally acting pressure and by relieving this pressure can be returned to the initial position by means of a magnetic part,

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which is arranged to be movable as a function of the movement of the pushbutton and a. Variety of magnetic Poles encompassed to produce a substantially parallel flux of lines of force in the opposite sense an oscillating spring switch, which is arranged close to the magnetic part, which is under the influence of the substantially parallel and oppositely directed flux of force lines in the open position can be maintained when the Pushbutton is in its normal position, and mainly under the influence of one of the two force line areas can be switched on when the pushbutton is in the working position.

Preferred embodiments are described below with reference to the drawing of the subject matter of the invention explained in more detail. iCs show:

Fig. 1 is a perspective view of an embodiment of the magnetic part that forms the switching device according to the invention,

FIG. 2 shows a perspective view of the positional relationship between the magnetic part according to FIG. 1 and a swing spring switch, showing the latter in the open position,

Figures 5A and 3B are side views showing the relationship between a pair of magnets that form the magnetic part according to Fig. 1, and the oscillating spring switch

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ter showing, the latter by the magnets in open or closed Showing position,

4 shows a perspective view of the switching device, shown partially broken, including the magnetic part and the oscillating spring switch,

Fig. 5 is a side view of the switching device, with with the pushbutton depressed or with the swing spring switch closed,

FIGS. 6a and 6B are perspective views of further exemplary embodiments of the magnetic part according to the invention,

7 is a plan view of an input keypad of a desktop electronic calculating machine including a number of the switching devices shown in FIGS.

k Fig. 1 shows an arrangement of magnets for actuation

the switching device. A layer 12 of non-magnetic material is on a metallic base plate upset. Kin pair of magnets 13 and I4 is firmly on the layer 12 arranged. The pair of magnets whose magnetic poles are at opposite ends of the same are arranged so that their adjacent poles

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are of opposite polarity, whereby a magnet part has four magnetic poles. Like in Pig. 1 shown is, a flux of force lines M1 between the poles N1 and S1, a line of force flow M2 between the poles N2 and S2, a force line flow M12 between the poles N1 and S2 and a flux of force lines M21 is generated between the poles N2 and SI. The magnets 13 and 14 are, however, arranged opposite in the magnetic sense and consequently also the Line of force flux M1 or M2 also in a magnetic sense opposite, whereby the flux of the lines of force of the two magnets in their adjacent parts is canceled. in the The result is the flux of lines of force M1 and M2 in the middle area O between the two magnets, the least strong and in the parts further away from the central area stronger. This also applies to the flow of force lines M12 or M21. With In other words, the magnetic flux density of the force line flux M1, M2, M12 and M21 gradually increases in proportion to the distance from the middle area Ö.- '

When a swing spring switch 15 is arranged in the manner is that des.sen switching elements 16 are provided in the central area O. are - as shown in Fig. 2 -, then the switching elements 16 are the least subject to the flow of lines of force and thus kept open. The line of force flow M12 and M21, which acts at the opposite ends of the oscillating spring switch 15, cannot significantly affect the switching elements 16 influence.

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Pig. 3A shows the oscillating spring switch 15 in the open position. By pressing down the base plate 11, the layer 12 and the magnets 13 and I4 are moved downwards, so that the magnet I3. just opposite the switch I5, as shown in FIG. 3B. When the switching elements 1.6 of the switch 15 B, nf are moved out of the central area in this way, the switch 15 comes into the area of the force line flux M1 of the magnet I3. This means that the flux of lines of force M1 penetrates the switch 15, causing the switching elements 16 to close, and thereby to establish an electrical connection.

Even if it was said of the base plate 11 that it is depressed, the same result can be expected by lifting the same when the swing spring switch 15 is brought into the area of influence of the flux M2 of the lower magnet I4.

4 and 5 show a complete switching device, W the essential part of which is shown in FIGS.

A pair of downwardly directed members 17 and I7 ^{1 are} attached to a holder plate I6 ¹ and have recesses 18 and 18 'aligned with one another on their respective inner side walls to slidably receive the base plate 11 described above.

The base plate 11 extends upward through a

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attached in the holder plate 16 (not shown) Slot, with three separate lugs 20, 20 'and 21 being provided. The approach 21 is shorter than the approach 20 and 20 '; a pushbutton 19 is firmly attached to it. A spiral spring 22 surrounds the extension 21 and is arranged between the push button 19 and the holder plate 16 ', so that the coil spring 22 causes the pushbutton 19 to rise. At the lower part of the base plate 11 is the Layer 12 attached, which carries the magnet part with the two magnets 15 and I4, as stated above. the Layer 12 engages the underside of retainer plate 16, thereby providing a lock for the Base plate 1 ″> by the force of the spiral spring 22 is not is pushed through the holder plate. In the area of the underside of the holder plate 16 'that is connected to the Layer 12 coincides, a layer of elastic material 23, such as mushroom, rubber or the like can be arranged, in order to avoid any noise caused by the lock when the push button I9 is moved back by the spring 22 will.

The cold plate I6 ¹ also has a pair of downwardly directed holder clamps 24 and 24 'so that the oscillating spring switch 15 is in the normal or depressed position substantially in alignment with the distance between the magnets 13 and 14 or that the switching elements 16 of the Switch 15 in the middle range 0

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are ordered, i.e., the oscillating spring switch 15 is the Subject to the influence of the force line flux MI and M2. Of the Stroke of push button 19 is of the way that it is moves downwards when the magnet 13 is pressed until the oscillating spring switch 15 is in the area of influence of the Line of force flux M1 of the magnet has been brought,

Such a position adjustment can be achieved by a suitable choice of the height of the attenuators 29 and 29 ', ^ which extend from the holder plate 16 · upwards.

The upper ends of the attenuators 29 and 29 'can with layers of elastic material JO and 30 ', such as felt, Rubber or the like. Be coated. This measure is intended to avoid any noise that would otherwise would occur when the attenuators hit the underside of the push button 19.

The switching device is also with an upper and a lower cover plate 25 or * 31 provided that the ™ Enclose the keypad.

FIGS. 6A and 6b show further exemplary embodiments of the magnetic parts which are fastened on the layer 112 of the base plate 111. In the example of FIG. 6A, a single magnet 126 of rectangular cross-section is used in which a pair of electrodes are provided. "The magnet

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126 has four magnetic poles, which are at its four corners in such a way are arranged so that adjacent poles are of opposite polarity. The effect of such a magnet on the Rocker switch is entirely the one previously associated with the effect described in the embodiment of FIGS same; a detailed description of the same is therefore unnecessary. It should be noted, however, that the use of such a single magnet reduces the manufacturing process of the magnetic part with greater ease.

In the embodiment of FIG. 63 there are two magnets

127 and 128 attached to layer 112 in such a way that that adjacent poles have opposite polarity. However, the two magnets have a different one Width, i.e. a larger width d1 for the magnet 127 and a smaller width d2 for the magnet 128. The larger Dimensions of the magnet 127 result in a greater density and strength of the flux of force lines M1 compared to the Force line flux M2, which is caused by the smaller magnet 128. As a result, the flux of the lines of force M1 is reduced to a lesser extent by the flux of the lines of force M2 is canceled in the adjacent parts of the two magnets. From this it follows that the magnetic part, which consists of two magnets of different dimensions are formed, only need a small path to move, to close or open the oscillating spring switch? in the opposite sense, this means a smaller blow

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on the pushbutton.

If one knows how to appreciate the previous description, the switching device according to the invention makes it possible to fix the oscillating spring switch perpendicular to the direction of movement of the pushbutton, whereby the height of the switching device can be significantly reduced.

Fig. 7 shows an example of an input "handover keypad shows in plan views of an electronic desk calculator machine, * in which a number of such switching devices densely

is arranged side by side.

The switching devices are designated with the numbers 41 to 49, of which the numbers 41-42-431 44-45-46 and 47-48-49 "lines" and numbers 41-44-47, 42-45-48 and 43-46-49 form "columns". Such switching devices 41 to 49 »which form any ordinary gaps are arranged in such a way that their magnetic parts in the

h point in the same direction. On the one hand are the magnet parts

41 ', 44 ¹ and 47' of the switching devices 41 »44 and -47 directed upwards, like Pig. 7 shows, whereas the magnet parts 42 ', 45' and 48 'of the switching devices 42, 45 Twid 48 are directed downwards; the magnet parts 43 '»46' and 49 'of the switching devices 43» 46 and 49 are again directed upwards. On the other hand, those switching devices 41 to 49 are an ordinary series

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form, arranged in this way that adjacent magnet parts are directed opposite to each other. As shown, the magnet parts 41 and ^ 3 ' face upwards, whereas the magnet part' kZ ' faces downwards; accordingly, the magnet parts hk < and k 6 'or k7' and 49 'point upwards, whereas the magnet parts 45' and 48 'point downwards.

The arrangement of the magnets of the switching devices, which form columns and rows, enables the oscillating spring switch 41 "to 4g" expediently pushed together in a keypad to arrange.

The same result can also be achieved if the switching devices rotated by 90 compared to the arrangement according to FIG. 7 and the columns and rows are interchanged so that the magnet parts in a certain column point in the same direction, whereas adjacent magnet parts in a certain one Line facing each other.

From the above it follows that the 'invention provides a push button switch assembly having magnetic reed switches driven by at least one magnetized portion Solenoid actuator are operable. Preferably the magnetized sections have a number of magnetic poles

in such an arrangement that they are essentially antiparsal Generate fields or power flows, Under the influence of awei such essentially anti-parallel magnetic fields or power flows, the reed switch is kept open for as long the associated pushbutton is in its normal (unactuated) position and the reed switch is closed when the influence of one power flow becomes effective. In accordance with the invention, a number of such arrangements are in matrix form combined with the formation of rows and columns in such a way that the magnetic sections in each individual row or columns are directed in the same way, but adjacent magnetic sections of common rows or columns are directed opposite one another are, This allows a very compact design of the keypad or a switchboard.

- patent claims -

Claims (1)

Claims ./Switching device, characterized by a push button (19) i that are produced by an external pressure in Can be brought to work and relieved of this Pressure can be returned to the starting position by means of a magnet part (13, 14), which is dependent on the movement the push button is movably arranged and a plurality of magnetic poles (N1, S1, N2 and S2) includes a substantially parallel flux of lines of force (M1 and M2) to produce in the opposite sense, by an oscillating spring switch (15)> which is arranged close to the magnetic part, the under the influence of the essentially parallel and oppositely directed flux of lines of force in open position is stable when the push button is in its normal position, and mainly under the influence of one of the two power lines (M1 or M2) can be switched on when the pushbutton is in the working position. 2ο switching device according to claim 1, characterized in that the magnetic part (i> _a 14) comprises two adjacent magnets (13 and 14) in the opposite sense, which are arranged such that adjacent poles (N1, S2 or N2, S1) opposite Have polarity. 3. Switching device according to claim 1, characterized 109 * 19 / 1-690 shows that the magnetic part comprises a magnet (126) which has four magnetic poles (N1, S1, N2. and S2) and is arranged such that adjacent poles are of opposite polarity. 4. Switching device, characterized by a push button (19)> caused by an external pressure in The working position can be brought back and returned to the starting position by relieving this pressure, by a Magnetic part (15,14) »which depends on the movement w movement of the push button is movably arranged and a Variety of magnetic poles (N1, S1, N2 and S2) includes to an im. to produce a substantial parallel flow of lines of force (MI and M2) in the opposite sense, by an oscillating spring switch (15) »which is arranged close to the magnetic part whose Oscillating springs (16) extend essentially in the same direction as the flow of force lines, which is below the influence of the essentially parallel and contrary fc set directed flux of force lines in open Position is stable when the push button is in its normal position, and mainly below the influence of one of the two force line areas (MI or M2) can be switched on when the push button is in the working position. 5 · Switching device, characterized by a push button (19) »which is caused by an external pressure in The working position can be brought and can be returned to the starting position by relieving this pressure by a Magnet part (15, 14) which is arranged to be movable as a function of the movement of the pushbutton and a Variety of magnetic poles (N1, S1, N2 and S2) comprises a substantially parallel flux of lines of force (M1 and M2) in an opposite sense substantially at right angles to the direction of movement of the pushbutton, by means of an oscillating spring switch (15) »which is arranged close to the magnetic part is, whose oscillating springs (16) are essentially extend in the same direction as the flux of the lines of force, which under the influence of the essentially parallel and oppositely directed flux of lines of force in the open position is maintained when the. Pushbutton is in its normal position, and which is mainly under the influence of one of the two areas of force lines (MI or M2) can be switched on when the pushbutton is in the working position φ 6. Switching device, characterized by a push button (19) »which is caused by an external pressure in Can be brought to work and relieved of this Pressure can be returned to the initial position by a BADORLGiNAL Magnet part (127 »128), which is arranged to be movable in dependence on the movement of the pushbutton and comprises a" plurality of magnetic poles (N1, S1, Έ2 and S2) to create a substantially parallel flux of lines of force (MI and M2) different in the Dense and essentially at right angles to the direction of movement of the pushbutton caused by an oscillating spring switch (15) »which is arranged close to the magnet part, whose spiral springs (16) extend essentially in the same direction as the flux of the lines of force, which is under the influence of the essentially parallel and oppositely directed flux of lines of force in the open position is sustained when the pushbutton is in its normal position, and the can be switched on mainly under the influence of one of the two force line areas (M1 or M2), which is of higher density. 7. Switching device according to claim 6, characterized h shows that the magnetic part (127 »128) two adjacent beard magnets (127 and 128) with opposite Direction, which are arranged in such a way that adjacent poles (N1 and S2 or N2 and Si) opposite Have polarity that one of the two magnets has larger dimensions than the other and that the larger magnet comes close to the oscillating spring switch (15) in its working position » 1 0981 d / 16dU ■ - 19 - 8. Switch arrangement, characterized by a plurality of switching devices (4I to 49) »those in columns (41,44,47 or 42,45,48 or 43,46,49) and lines (4V 42,43 or 44, 45 »46 and 47,48,49) are arranged in this way are that all magnet parts in any ordinary line point in the same direction, but that are adjacent Magnetic parts of any ordinary column are directed opposite to each other, through each Switching device assigned pushbuttons (19) »the can be brought into the working position by an externally acting pressure and by relieving this pressure in the starting position is traceable by a magnetic part (13 * 14) 1 that depends on the movement of the pushbutton is movably arranged and a plurality of magnetic poles (N1, S1, N2 and S2) comprises to one essentially parallel flow of lines of force (MI and M2) caused in the opposite sense, by an oscillating spring switch (15) »which is close to the magnetic part is arranged under the influence of the substantially parallel and oppositely directed Line of force flow can be maintained in the open position, when the push button is in its normal position, and that mainly under the influence of one of the both force line areas (M1 or M2) can be switched on when the pushbutton is in the working position. QßKMNM. INSPECTED 109819/1690 9. Switch arrangement, characterized by a plurality of switching devices (4I to 49) »those in columns (41, 44, 47 and 42, 45, 48 and 45, 46, 49) and lines (41, 42, 45 and 44, 45, 46 and 47, 48, 49) are arranged in this way are | that all magnet parts in any ordinary column point in the same direction, but that adjacent ones Magnetic parts of any ordinary line are directed opposite to each other, through each Switching device assigned pushbuttons (19) »the t brought into working position by external pressure bar and can be returned to the starting position by relieving this pressure, by means of a magnetic part (i5 »I4)» which is arranged to be movable as a function of the movement of the pushbutton and comprises a plurality of magnetic poles (N1, S1, N2 and S2), in order to produce an essentially parallel flux of lines of force (M1 and M2) in the opposite sense , by means of an oscillating spring switch (15) »which is arranged close to the magnet part, which is held in the open position under the influence of the essentially parallel and oppositely directed flux of lines of force ₉ if the pushbutton is in its normal position} and which can be switched on mainly under the influence of one of the two force line areas (M1 or M2), -when the pushbutton is in the working position » 109819/1690