CS55392A3 - Micro-switch and process for producing thereof - Google Patents

Abstract

A microswitch has an insulating housing (11) and a switch slide (14) which passes through an opening (12) in one wall (13) of the housing (11) such that it can move and slide, with the end region (14'), located inside the housing (11), of which slide contacts (15, 16, 17, 18) are firmly connected which interact with mating contacts (23, 24, 25, 26) which are fixed to the housing and are connected to connecting contacts (19, 20, 21, 22) which are guided to the exterior through a wall (38, 44) of the housing (11). Integrated into the end region (14') of the switch slide (14) is a contact link (27) which extends at right angles to the movement direction of the switch slide (14). The mating contacts (23, 24, 25, 26) which are fixed to the housing and interact with the contact link (27) are in each case constructed on metal strips (28, 29, 30, 31) which are embedded in one and the same insulating spacer (32) and are guided through openings (34, 35, 36, 37) in the housing (11) to the external connecting contacts (19, 20, 21, 22). <IMAGE>

Description

1 4Βτ. · Μν &amp; ϋτεδátΑ 1f5 <W FRAKA ý fenš Z * »Microswitch 563-31

Oblast_techniky

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a microswitch with an insulating sleeve, an insulating slide valve guided movably, in particular a sliding hole in the housing wall, with metal contacts which are firmly connected to the countercontacts fixed in the housing by means of a metal contact bridge. The invention also relates to a method for producing a microswitch. In particular, the invention relates to a quadrupole microswitch. posayadní_stav_tečhniky

Microswitches are known in numerous embodiments, and there is still a problem, on the one hand, of switching electrical contacts sufficiently to isolate one another, to provide sufficient switching paths, and to provide compact construction. SUMMARY OF THE INVENTION It is an object of the present invention to provide a microswitch of the aforementioned type which has relatively large contacts and electrical conductors, while being particularly compact in construction without the risk of short circuit between the electrically conductive elements insulated from one another. they exhibit a relatively large switching path in proportion to their small structural dimensions and should in particular be economically mounted and, if necessary, dismantled. The individual insulated components should be made of a plastics material according to domestic production methods, for example by injection molding.

According to the invention, this object is achieved in that a contact bridge carrying a contact, arranged perpendicularly to the direction of movement of the switching slide, is connected to the contact gate contact area located inside the housing and are formed by contact bridging counter contacts which are fixed in the housing. on rigid metal strips that are embedded in the same insulating dispenser holder and the openings in the housing are guided to the outer connections.

By arranging the metal strips firmly in the housing in the insulating spacer holder, respectively. On the insulating spacer holder, in particular, the structurally determined distance between the metal strips arranged separately from one another is retained reliably. The connection of the contact bridge with the switching slide and the metal strips to the spacer ensures in particular a compact construction of a large switching path. Advantageous developments of the invention are defined in the subclaims.

The measures according to claim 3 of the claims ensure, without increasing the structural dimensions, in particular, a linear linear guide of the switching slide.

In particular, the precise linear guidance of the switchgear is provided by the provisions of clauses 4 and 5 of the claims, whereby at the same time the required location of the contact bridge is formed.

The return spring arrangement according to claim 6 allows the microswitch to be formed as a pushbutton, which has a steady position, which connects the contacts and the operating position by pressing against the elastic force.

Particularly preferred embodiments are defined in paragraphs 2 and 7 to 10 of the claims.

On the one hand, the construction according to point 11 of the patent specifications is achieved, in particular, in a compact configuration, and in particular the necessary electrical insulation between the various metal strips is ensured in a particularly reliable manner.

In particular, points 12 and 13 of the claims relate to a preferred embodiment of the invention.

By virtue of the measures of point 14 of the patent claims, the support wall does not need to be excessively heavily di-dimensioned since it can rely in particular on the connection of the features of point 15, both from the front and from the other components.

On the basis of the retaining wall according to item 16, it can be made together with the block parts in one piece as a sprayed casting.

It is particularly advantageous if, according to paragraph 17 of the present claims, the front wall is formed as a lid, so that when the lid is removed, the inside of the housing is fully accessible, which in particular allows simple and polar mounting. fcv- · -.

By providing the grooves of claim 18, the metal strips are embedded in the spacer so that the combination of the spacer and the metal strips can be housed in the housing in a particularly compact manner and provide a non-slip grip on the metal strips.

The openings according to claim 19 are so large that when assembling the metal strips with connecting contact, they can be inserted from the inside without difficulty. Due to the formation of metal strips and suitable projections, the holes are practically closed after assembly.

According to point 20, it is expedient if the metal strips are simply held between the individual components without additional fastening means. In a similar manner, the spacer is fixed by clamping in the housing. Furthermore, it is advantageous if the construction is carried out according to points 21 to 23 of the claims. A preferred mounting method is defined by paragraph 24 of the present claims. Optionally, after removal of the front wall as a lid, disassembly can also be carried out in a stepwise manner. Overlay_Drawings_Drawing

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail, for example, in the drawings.

FIG. 1 is a partial cross-sectional view taken along the line I-I of FIG. 2 of a preferred embodiment of a microswitch according to the invention;

FIG. 2 shows a section along line II - II in FIG. 1.

Fig. 3 shows a front view of the housing.

Fig. * + Shows a section along line IV-IV in Fig. 3

Fig. 5 shows a section along line V-V in Fig. 3 ·

FIG. 6 is a sectional view along line V - VI of FIG. 3.

Fig. 7 shows a front view of the spacer holder used in the microswitch.

Fig. 8 is a top plan view of a spacer holder according to the invention.

Fig. 9 shows a side view of the spacer holder partially in section.

Fig. 10 shows a front view of the sleeve slide.

FIG. 11 is a side view of the switchgear.

FIG. 12 is a front elevational view of the clamping element of FIGS. 10, 11 for fastening the contact bridge in the switching slide.

Fig. 13 is a side view of the embodiment of Fig. 12.

Fig. 1 * + shows a rear view of the front wall which is mounted on the housing.

Fig. 15 is a side view of the guide of Fig. 14.

Figure 16 is a sectional view taken along line XVI - XVI of FIG. 14.

Fig. 17 shows a section along line XVII - XVII of FIG. 14. Examples of the invention

1 to 6, the microswitch according to the invention has a cuboid housing 11, in which a slot-like aperture is provided in the upper wall 11 and open to the rear wall 8. A rod-shaped slide valve 14, as shown in FIG. 2, 2, which is shown in detail in FIGS. 10, 11, is disposed in the sliding receptacle 12 in its sliding receptacle. .

This blocking extension 14y is provided downwardly. an opening perpendicularly extending receiving channel 5.1 into which the contact bridge 22 / fig. 1, 2) consisting of solids. metal sticks. After engagement of the contact bridge 27, a clamping element 48 according to FIG. 12, 13, which has two lateral guide portions 48 ' and an upper &apos; s center portion 49 &apos; 1, from which the downwardly extending resilient guide rod 48 'extends between the conduit portions 48 &apos; , 11 / in the front wall of the scratch

The guide portions 42 are arranged in a sliding fit within the internal channels 51 and, after engagement of the latch protrusion 8 '' into the recesses 14 '', the contact web 22 which has previously been inserted into the housing 31 is perfectly fixed. Optionally, the retaining means (not shown) may be arranged between the contact bridge 27 and the switching slide 14 and / or the clamping element 48, which prevents a 2% displacement contact bridge in the Oa longitudinal direction.

A screw spring 45 shown in FIGS. 1 and 2 is fitted to the flexible guide portion 48 'and extends to the bottom 44 of the housing 11 and is supported therein. The screw spring 45 biases the switching slide 14 in its upper end position.

At the ends of the metal contact bridge 22 which extends on both sides of the switching slide 14 according to FIG. 2, they are arranged from the upper and lower contacts 15, 16, respectively. 12, 18 a pair of contacts. Acts 15, 16, respectively. 12, 18 are aligned with them above or below their countercontacts 21, 24 and 24, respectively. 25, 26 which are formed at the ends of the rigid metal strips 28, 28 and 28, respectively. 10, which are embedded in the plastic spacer. 1, 7 and 8, the spacer holder 2 consists of two-side lower block parts 525 and a retaining wall 51, connecting the block parts 2 'in one unit and extending upwardly into the upper counter-contacts 25, 25, In the housing 11, according to FIGS. 1 and 2, there are two kinds of metal strips.

The metal strips 28, 20 arranged at a distance parallel to one another and carrying contacts 2k, 26, have a contaikh holder portion 28, 22 'facing the contact bridge 22 molded into the recess of the metal strip of the block portion 2' of the spacer 22 3 of plastic . From this, preferably at a right angle downwardly extending, parallel to the rear wall 28 of the housing 11, the connecting portion 28, 21, 22JJ / FIG. 2 / g extends downwardly in a continuation of the groove 42 so that thereafter, in the rearward portion 44 of the housing, the through portion 28 '' 'which passes through the aperture 2i in the rear wall 28' 'follows in an obliquely downwardly extending connection portion 28' ' which extends approximately 20 ° to the perpendicular, and the connection contacts are provided.

Another type of metal strips 22 ', which bears the contacts 22 &apos;, has a horizontal portion 2% ' arranged above the contact web 22, from which a connecting portion 22J &apos; , which is embedded in the front bearing groove 42 of the metal strip / fig. 8 / support walls 22, 21, and the connecting portions of the metal strips 22 &apos;, 22 ' are pre-retained by the front wall 42 &apos; In the bottom region 44, the metal strips 22 &apos; to pass through the through holes 25 or 2Z in the downstream portion 11 &apos; in the downstream portion 29 &quot;, which then extends in parallel with the through portions 28 &apos;

The connection contacts 20, 22 ± are located there

The latter is opened to the front in accordance with FIG. 4, thereby ensuring easy assembly of the coil strips 29, 11 &apos;

On the rear side of the switch slide 14 is shown in FIG. 10 and 11, a vertical groove 39 &apos; is formed in the lower region 39, which extends inwardly from the rear wall 8 &apos; guide pen 40.

1 and 14 to 17, the front wall 41 is formed as a foldable lid having a top side and a bottom center portion (fig. 1). 14 / elastic latching projections 46 extending towards the rear wall, which cooperate with the upper and lower recesses 46a, respectively. FIG. 3 / a so that the snapped lid is not only rigidly connected to the housing 11, but also holds the inserted structural parts in place. The lid according to FIGS. 14, 16, 16 has a guide outlet 50 which, when the lid is inserted into the slot 12 of the housing 11 / FIG. 3, 5) pushes the asia so deep that the front surface 41 of the switching slide 14 inserted in the slotted opening 12 &apos; the insertion of the front wall 41 on the housing 11 enters the forward direction of the openings 35 and rests on the through portion 22, 31 '(31) of the metal foils 22' and reliably retains the metal strips 22, 31 in their lower ranges.

The installation of the function of the described microswitch is as follows.

IQ

The assembly takes place by inserting both the short and low metal strips 20 31 in front into the housing 11 with the front wall removed, wherein the connection contacts 1g, 21 with the respective connection contact portions 28 and 31 respectively. they are guided by sufficiently large and, according to the drawing, openings 3, 25 to reach the position according to FIG. 1. Also, by opening the front side of the housing 11, it switches the gate valve 16 from the front to the position shown in FIG. a contact bridge 27 is mounted. Also, the reciprocating piston 45 is brought into the housing 11 and prestressed.

For this purpose, the spacer holder 32 'is also inserted from the front side of the housing 11, while the portions 28' of the spacers 32 '. The 32-way contact holder and the connecting portions 32A-P22 are placed in the grooves 42 provided for this purpose and thus the metal strips 28, 32 are perfectly fixed.

Also long and high metal strips 22 &apos; &amp;amp; they are brought to the position shown in pbr. 1 and 2, wherein the front and bottom grooves 42 of the distance plastic holder 32z are disposed.

Now, only the front wall 43 formed in a manner which is to be fitted and snapped onto the housing 11 must be in the position shown in FIG. 1, whereby all the individual parts are fixed to each other, but the sliding ability of the switching slide 14 is maintained. The screw spring 41 pushes the switch slide into the upper position, which is visible in FIGS. 1 and 2, where the movable contacts are in electrical contact with the counterparts 23, 2S · 11.

If the switching slide 14 is now pressed downwards in the arrow direction 42, the movable contacts 15, 12 are lifted away from the counter-contacts 21, 25 and movable contacts 16, 18 come into contact with the customs counter-contacts 24, 20 after the switching path. In doing so, the return spring 45 is compressed ·

Upon release of the switch slide 42, the result of the action of the screw spring 45 moves again to the upper position shown in FIG. drawing.

After removing the front wall 4J, which can be done for example! by pressing the elastic catching tab 46 with a suitable tool, the microswitch can also be removed at any time without any problems.

Of particular importance is the fact that the metal strips 28, 22 ', 10 &apos;, 10 &apos; where they abut the spacer bracket 42 are recessed from the receiving grooves 42 &lt; tb &gt; The parts 28 '' '', 22 '' (11 '' downwardly directed at 45 ° + 30 ° allow the microswitch to be arranged in a predetermined radius.

Claims (20)

fTf: PATENTED Π S O K Y, 1. A microswitch with an insulating sleeve and an insulating switching slide guided movably, in particular a sliding opening in the housing wall, with the metal contacts of which are connected to the countercontacts fixedly arranged in the sleeve by means of a metal contact bridge in the end region of the housing. and connected to the connection contacts extending outwardly through the housing wall, characterized in that a contact bridge (27) carrying contacts is connected to the end region (14 ') of the gate valve (IV) located inside the housing (11). (15, 16, 17, 18), arranged perpendicular to the direction of movement of the gate valve (IVa), with the contact bridge (27) cooperating with the contacts (23, 2 * t, 25, 26), fixed in the housing (11), are formed on rigid metal strips (28, 25, 30, 31) which are housed in the same insulating stand (32) and openings (3, 35, 36, 37) in the sleeve (11) are guided y for external connection contacts (19, 20, 21, 22). 2. Microswitch according to claim 1, characterized in that the clamping slide is located substantially in the center of the contact bridge (27) and is parallel to the rear wall (38) of the housing (11) and is slidable thereon. 3. A microswitch according to claim 1 or 2, characterized in that a groove (39) is provided by a spring (40) between the rear wall (38) and the end region (14 '/ 13) of the switching slide (14) for lateral guidance of the switching slide (IV). L +. A microswitch according to claim 2 or 3, characterized in that the actuating slide (14) is guided on its abutment surface (33) facing upward from the front wall (43) by its advantageous surface facing away from the rear wall (38). / · 5. Microswitch according to one of the preceding claims, characterized in that the switching rod (14) of the substantially rod-shaped configuration has a stepped and an end region (14V) preferably in the housing (11) with respect to the front wall (43). forming a cuboid extension in which the con-bridge is located / 27 / · Microswitch according to one of the preceding claims, characterized in that a spring (45) is arranged between the end region (14 ') and the bottom (44) of the housing (11). 7. Microswitch according to one of the preceding claims, characterized in that the switching slide is extending, in the extension (14 ') substantially parallel to the wall (3'), the groove (51) open in the downward direction and in which it is located. , preferably the contact bridge (27) also extends substantially parallel to the rear wall (38). 8. The microswitch according to claim 7, characterized in that the upper end region of the return spring (45) is also located in the groove (47). The microswitch according to claim 7, wherein the contact bridge is held. a clamping element (48) is inserted, in particular snapped, from the bottom of the groove (47), which at the same time forms the upper support bearing for the return spring (45). 10. Microswitch according to claim 9, characterized in that the clamping element (48) has lateral guide portions (48 ') for the groove depth (47) and a central portion (48') for supporting the spring on which it is formed. preferably a flexible guide projection (48 ") is provided. 11. Microswitch according to one of the preceding claims, characterized in that the spacer (32) carries on one side, preferably the rear side, the metal strip (28, 30) of the counter-contacts (24, 26), which are preferably lower in the switching position. the switching position of the switch gate (14) switched by the contact bridge (27) and on the opposite side, preferably the front side of the metal tape (29, 31) of the counter contacts (23, 25), which at a different switching position, preferably the upper switching position of the switching gate / switched by a contact bridge (27), with the metal strips / 28, 30 and / or 29, 31 / 3S0U are supported in correspondingly shaped receiving grooves (49). 12. The microswitch according to claim 11, wherein the metal strips (28, 29); 30, 3V counter contact23, 24; 25, 26 / opposed to the same contact bridge regions (27), are preferably guided in the right-hand angled opposite sides of the block portions (32 ') to the connecting contacts / 19, 20 | 21, 22) arranged in the lower region of the housing (11), the length of the metal strips (28, 29); 3, 31 / 3e that the different metal strips 28, 29; 30, 31 / show the smallest distance sufficient for electrical insulation. 13 »Microswitch according to claim 12, characterized in that the counter-contact (24, 26) is arranged on a metal strip (28, 30) arranged below the contact face (27) in the block part region (32 ') and assigned to a contact / 23 25 is provided on an associated metal strip (29, 31) extending on the opposite side of the contact housing (27), which is held by a support wall (32 **) arranged in front of the switching slide (14), which preferably extends from the block parts (32). in the direction of the respective ticks (23, 25), in the grooves (49) corresponding to the shape of the metal strips. 14. Microswitch according to claim 13, characterized in that the support wall (32 **) is also supported on the front wall (43) of the housing (11). 15. Microswitch according to claim 13 or 14, characterized in that the lower end region (14 &apos;) of the switch gate (14) is supported against its support wall (32 &quot;) by its front side. 16. Microswitch according to one of the points. 13 to 15, characterized in that the support wall (32 ") is arranged between the block parts (32") and connects and advantageously forms it in one piece. 16, characterized in that the front wall (43) forms a component separated from the housing (11) and is preferably fastened to the housing (11) in a snap-fit manner by a snap-fit hole (12). 14 / in the top wall (13) is outwardly open and the front wall (43) carries a projection (50) preferably closing the opening (12) up to the switching check-Friday (14). Microswitch according to any one of the preceding claims, characterized in that the depth of the deposited grooves (49) for the metal strips is substantially equal to the thickness of the metal strips (28, 29 »3, 31), so that the metal strips are in the grooves. / 49 / submerged. Microswitch according to one of the preceding claims 1 to 18, characterized in that through holes (34, 35, 3 &amp;,) are provided in the bottom (44) of the housing (11), optionally also in the lower region of the rear wall (38). (37) through which they are guided outwardly from the inner sleeve (11/17), with the metal strips (19, 20, 21, 22) removed from the front wall (43). Wherein the metal strips (28, 29, 30, 31) are brought to their desired position. Microswitch according to one of the preceding claims 1 to 19, characterized in that the metal strips (28, 29, 30, 31) are held between the sleeve (11) and its front wall (43) and, on the other hand, between the spacer (s) / 32 'and the spacer holder 32' is held between the front wall (43) and the rear wall / housing (11). Microswitch according to one of the preceding claims, characterized in that the metal contact pad (27) is arranged symmetrically on both sides of the switching slide (24) and carries a contact pair consisting of upper and lower contacts (13, 16); 17 &apos; 18 &apos; and the spacer (32) have two block portions (32 &apos;) in vertical view with contact pairs. Microswitch according to any one of the preceding claims 1 to 21, characterized in that the metal strips (28, 3 ') of the counter contact (24, 26) facing away from the inlet opening (12) of the gate valve (14) have a contact portion (28z, 3θζ) of the holder facing the contact bridge (27) which lies in the upper groove (49) of the associated block portion (32 ') of the spacer (32) and carries the respective contacts (24, 26) and preferably at a right angle thereof downwardly extending interconnecting portion (28 ", $ 0 '') parallel to the rear wall (38), which lies in the groove (49/18) at the rear of the spacer holder (32), in the direction of the retracted passage = yjna / 28" J "; (preferably in the region AV) which is / is formed by the 3V in the rear wall and has a connecting contact portion which preferably takes place at an angle of + 5 ° + 30 ° to the direction of movement according to arrow A2 / resp. to the rear wall (38). 23- Microswitch according to one of the preceding claims, characterized in that the metal levers (25, 31) of the counter-contacts (23, 25) facing the inlet port (12) of the gate valve (IV) have a horizontal portion (29 ', 31'). a contact holder, which is returned to the contact body (27), which carries for the contacts (21, 25), preferably at right angles to it (44) the branch connection (29 "), which preferably extends in the front vertical groove (49) of the support wall (32 ") of the spacer (32) and abut the rear face of the front wall (43), further have a joining portion (29" V) at the bottom (44) preferably bent down at 90 ° which is also embedded into the groove (49) and the downstream passage (29 '' ') passing through the opening (35) in the bottom (44) downwards and which housing (11) passes into the connection contact portion (23 ""). A method for producing a microswitch according to any one of claims 1 to 23, characterized in that the two lower rear metal strips (28, 10) are first inserted from the front into the open sleeve (11), after which the contact slide (14) is engaged with the contact housing. and then from the front 19, it is inserted into the sleeve (11) of the spacer holder (32) and inserted into the front open openings with the front, upwardly extending metal strips (29, 31). / 35, 37 / ve / M + /, whereupon the front wall Λ3 / closes the holding of all components in the housing / 11 / · 21 List of used reference numbers 11 housing 12 hole 13 upper wall switching slide 15 to 18 contact at 19 connection contact 20 connection contact 21 nc contact contactcontact contact 23 countercontacts 24 countercontacts 25 countercontacts 2c countercontact 27 contact bridge 28 metal strap 29 metal strap 30 metal strap 31 metal strap 32 spacer bracket 34 rear 34 hole 35 hole 36 hole 37 hole 38 rear wall 39 slot 40 guide pen 41 spinning surface 42 arrow 43 front wall 44 dn 0 48 clamping element 49 groove 50 guiding outlet storage channel 51 ΑΛ3Γ80VAZ31VNAA Cdddvgn of 5 '11 szn $ .c 'I 9 ii η 0 0 45 spring 46 spring-catching lugs