FR2616265A1 - HANGING SWITCH - Google Patents

Abstract

Latching switch comprising tilting contact means, stroke limiting means linked to a pawl 12 locking the assembly of the parts making it up, and latching means comprising springs 17, 18; 34, 60, integral with the fixed part of the switch, and cooperating with a set of ramps and bearing surfaces integral with a movable pusher 19.

Description

HANGING SWITCH.

  The present invention relates to a latching switch which can have very numerous applications in

  control systems for electrical installations or apparatus

  triques and electronic. In such installations, switches are frequently required which can be operated with a simple push of a finger and which can be installed and connected easily in places where the

space is often limited.

  The switch according to the invention responds very well to these needs and also has the advantage of a reduced cost due to the small number of parts that compose it and their great simplicity of assembly. Its hanging function can be easily eliminated by the user himself if necessary, which gives this switch a very large

flexibility of use.

  There are already many latching switch solutions generally combining contact means with flexible or sliding blades and latching means

  complexes with many moving parts.

  These devices have the disadvantage of requiring tolerances

  tight rancid production of parts and training

delicate and expensive assemblies.

2 6 1 6 2 6 5

  - 2 - Furthermore, and because of their complexity, their duration

life is often limited.

  The subject of the present invention is a hook switch.

  chage of the push-button type, characterized in that it comprises, in a switch body: - tilting contact means comprising a contact plate that can tilt around two pivots, at least one of which, made of conductive material, is connected to one of

  switch connection terminals, said plate repo-

  alternately on one of two stops placed on each side of the tilting axis, at least one of which is conductive and connected to another connection terminal

  of the switch, the tilting position being defi-

  negated by the differential pressure of at least two

  spells of which at least the length and advantageously the

  stiffness are different, said springs being compri-

  set by the push button of the switch; means for limiting the stroke of the pusher comprising a stop linked to a pawl, integral with the pusher, said pawl serving to lock the pusher in the body of the switch at the time of assembly, said pawl and said stop moving in a light of said body, said pawl ensuring the limitation of travel in one direction by abutting against one of the ends of said light, said stopper ensuring the limitation of travel in the other direction by abutment against the other end of light, said ratchet comprising a tooth formed by a ramp oriented so that it retracts it during mounting in the body and a stop for limiting the stroke;

  - attachment means comprising a preferred spring

  this in the form of a wire, having one end fixed to the body of the switch, said spring being substantially parallel to the direction of movement of the pusher and having its other end bent and forming a finger pressing on a part of the pusher on which is located -3 a set of spans and ramps with which it cooperates, five of these spans delimiting an elevation around which said finger moves under the effect of

  movements of the pusher, said elevation being delimited

  tée on two sides by two first litters substantially

  parallel to the direction of movement of the pusher, three

  fifth span joining said first two spans at an acute angle with one of them, and delimiting the third side of the elevation by facing the finger when the pusher is at rest, two other spans, forming a V whose point is turned towards the inside of the elevation, delimiting the fourth side of said elevation, a sixth span, starting from the junction point of the shorter of the first two spans with one of the spans of the V, being substantially perpendicular to said span of the V, lower than said span, and delimiting with the V a kind of hollow, a seventh span, substantially perpendicular to the sixth span and starting from the junction point of the second parallel span and the second span of the V,

  delimiting an area even lower than said hollow.

  An embodiment will be described below by way of example.

  ple nonlimiting, with reference to the accompanying drawings in which: FIG. 1 is a broken axial section of the assembly of the latching switch according to the invention; Figure 2 is a right view, showing the rear part of the switch of Figure 1;

  Figure 3 is a left sectional view of the inter-

Figure 1 switch;

  Figure 4 is a right sectional view of the inter-

  Figure 1 switch; - 4 - Figure 5 is a front view of the contact plate of the switch of Figure i; Figure 6 is a sectional view of the contact plate of Figure 5; Figure 7 is a top view showing, enlarged, the attachment means of the switch of Figure 1; Figure 8 illustrates the operating sequence of the hooking means of Figure 7; Figure 9 is a perspective view of the hooking means of Figure 7 showing their operating sequence.

  As shown in Figure 1, the snap switch

  chage consists of: - a hollow body 1 and substantially of revolution around an axis 2, of which a part 3 can be placed in abutment on a front face 4 thanks to a shoulder 5, of which an opposite part 8 is arranged to receive contact and attachment means, and provided with fixing means on said front face 4 which may be a nut 6 screwed onto a screw thread 7 outside said body 1, or any other means; - A pusher 9 also hollow, substantially of revolution around the axis 2, which can slide inside the body 1, being guided in translation, in a range 65 of said body 1, by a flange 10 which serves. bearing surface for the operation of the switch on the one hand and, in a range 64 of the same body 1, by a part 11 of said pusher opposite the flange 10 on the other hand, including the interior, comprising in particular two guides 19 and, is arranged to cooperate with the contact means, and the exterior of which comprises part of the hooking means as well as a pawl 12 intended to lock

- 2616265

  - This pusher 9 in the body 1 at the time of assembly, to prohibit any rotation of said pusher and to define the limits of its stroke; - Three blades 13, 14 and 15, of conductive material, provided at one of their ends with connection means to external circuits, placed in housings arranged in the body 1 so as to ensure their fixing and their electrical isolation, and of which the other ends, placed inside the body 1, have a shape adapted to the interrupt functions; - A contact plate 16 of also conductive material, of substantially circular shape and which comprises pivoting and guiding means; - Two springs 17 and 18, guided inside the pusher by the guides 19 and 20, pressing on the contact plate 16 and whose stiffness and different lengths will ensure the tilting of said plate; - A spring 60, placed between the body 1 and the flange 10 of the pusher 9, and intended to maintain said pusher in the rest position; a spring 34, second part of the hooking means, preferably in the form of a suitably bent wire, fixed in

  housing in the body 1.

  Figure 2 shows in right view the arrangement of the three blades 13, 14 and 15 which are advantageously placed 120 from each other and whose ends for external connections are located in cells 35, 36

  and 37 fitted in part 8 of body 1.

  The spring 34 is inserted into a hole 38 drilled in the part 8 of the body 1 in an area separating two cells,

for example 35 and 36.

  Figure 3, which is a sectional view of the switch whose pusher 9 and the contact plate 16 have been removed, shows the arrangements of the interior of the part 8 of the body 1 intended for the contact means. There are: -6- - the cylindrical seat 64 serving as a guide for the pusher 9; the internal parts of the three blades 13, 14 and 15, the ends of which will be used for the contacts, the end of the blade 13 preferably being pointed to serve as the first pivot for the contact plate 16, the ends of the other two blades, 14 and 15, preferably being rounded to serve alternately as a support for the contact plate in the rest and work position respectively; a pin 39 secured to the bottom of the part 8, the axis of which is preferably parallel to the axis 2 of the body 1, the end 40 of which is preferably conical, will serve as the second pivot for the contact plate 16 and is substantially at the same height as the pointed end of the blade 13 of

  so that the line or axis 47 which joins them is sensitive-

  ment perpendicular to the axis 2 and in a plane of symmetry of the body 1; two housings 41 and 42, preferably cylindrical, parallel to the axis 2, the inlets of which are advantageously flared and the internal diameters of which are adapted to hold the guides 19 and 20 of the pusher 9 in their

allowing to slide.

  FIG. 3 also shows the finger 43 of the spring 34 penetrating inside the body 1 through a slot 44 to cooperate with

  the means for hooking the pusher 9.

  Figure 4 is a right sectional view of the complete pusher. We find there:

  - The body 1 pierced with the slot 44 on the one hand and an open-

  ture 45 parallel to the axis 2 and which serves to guide the pawl 12 on the other hand; the pusher 9 at the bottom of which the guides 19 are fixed and which carries an imprint 46 cooperating with the spring

  34 to perform the latching function, said imprint

  you being preferably molded in a part of the pusher having a sector 50 encroaching inside its cavity; - 7- - the pawl 12 secured to the pusher 9 comprising at least

  a ramp 61 and a span 62 and whose width is slight-

  rement lower than that of the opening 45 of the body 1; - Guides 19 and 20 parallel and advantageously cylindrical in shape so that their plane is parallel to axis 2, or substantially perpendicular to line 47 which joins the vertices of pin 39 and blade 13, and is substantially equidistant from each of these two peaks;

  - the springs 17 and 18 threaded around the respective guides

  clothing 19 and 20; the contact plate 16, advantageously pierced with a single opening 52 through which the two guides 19 and 20 pass, bearing on the springs 17 and 18 by bearing surfaces 48 and 48a respectively on the one hand, 49 and 49a d on the other hand, and comprising recesses or housings 54 and

  53 for the vertices of blade 13 and pin 39.

  Figures 5 and 6, associated with Figure 4, and which represent

  feel in view from the left and in section the contact plate,

  provide a better understanding of the role of the different bosses

ages and hollow it contains.

  In these Figures 4, 5 and 6, the bearing surfaces 48, 48a, 49 and 49a are bosses advantageously produced by stamping in the contact carrier plate 16. They are made so that the two straight lines joining the tops of the bosses

  48 and 48a on the one hand, 49 and 49a on the other hand, are sensitive

  clearly perpendicular to the greatest direction of

  the opening 52 and perpendicular to the direction of tilting

  LEMENT materialized by two recesses made on the other side of the contact carrier plate. One of these recesses 53 is preferably conical in shape. The other V-shaped 54

  has an inner edge whose direction passes sensi-

  by the top of the cone of the other hollow.

  These two recesses 53 and 54 come to bear on the tops of the blade 13 and of the pin 39 and constitute the tilting axis - 8 - of the contact plate 16. They perfectly define the position of said plate and are positioned on that so that it can swing freely inside the

pusher 9.

  Figure 7 shows the side of the switch whose body 1 is cut to reveal the enlarged imprint 46

for a better understanding.

  In this FIG. 7, the spring 34 passes in a groove 55 parallel to the axis 2 and which widens on the side of the slot 44 in a flare 56. The said spring is thus firmly held at its base, but can move from elastic way

  on the side of his finger 43, his rest position being perfectly

  determined by bleeding 55.

  Footprint 46 includes spans 31, 32, 27, 33, 28, 29 and 63 and ramps 23, 57, 58, 59 and 21 separated by edges 24, 25, 26 and 22, the details of which appear more clearly. in FIG. 7 and in the perspective view of FIG. 9, on which the finger 43 of the spring 34 comes to bear to carry out the latching function and whose subsequent explanation of the operation will specify better

respective roles.

  The ranges 31, 32, 27, 63 and 29 define an elevation around which the finger 43 will rotate under the effect of

  pusher movements. Scopes 32 and 29 are preferably

  rence parallel to each other and substantially parallel to the

  direction of movement of the pusher. The scope 31 delimi-

  both the elevation 65, faces the finger 43 when the pusher is at rest and makes an acute angle with the bearing

  29. The ranges 27 and 63, forming a V returning to the interior

  laughter of the elevation 65, delimit the fourth side of

the elevation.

  The bearing surface 33 starts from the junction point of the bearing surfaces 32 and 27, is substantially perpendicular to said bearing surface 27 and its

  upper edge 25 is lower than the elevation 65.

  The bearing surface 28 starts from the junction point of the bearing surfaces 29 and 63, is substantially perpendicular to said bearing surface 63 and forms with the ramp 58, delimited by the bearing surfaces 33, 27 and 63,

an edge 26.

  The switch thus described performs the contact function

as follows.

  At rest, the pusher 9 is held by the spring 60 and the pawl 12 in the opening 45, as shown in Figure 1. The contact plate 16 supported on the blade 13 and the pin 39 also rests on the blade 14 under the effect of

  spring 17 which, already compressed in this position of the push

  evening 9, exerts, by the bosses 48 and 48a, on said plate, a torque, around the pivot axis 47, stronger than that produced by the spring 18, stiffer but

  very little compressed and which presses on bosses 49 and 49a.

  Contact plate 16 establishes contact between the blades

13 and 14.

  When the plunger is pressed, the torque exerted by the spring 18 on the contact plate increases faster than that exerted by the spring 17 and exceeds it, causing the tilting of said plate which comes to rest on the blade 15, establishing the contact between blades 13 and 15 after

  having cut the contact between the blades 13 and 14.

  The pusher is limited in its travel by the bearing 62 of the pawl 12 which abuts at the bottom of the opening 45 of the

body 1.

- 10 -

  When the button is released, and if the switch is not fitted with a latching system, everything returns to the

initial position.

To note that:

  - the bosses 48 and 48a, 49 and 49a form for the res-

  spells 17 and 18 a kind of hinge which reduces friction, perfectly defines the fulcrum of forces and removes any uncertainty about the value of the tilting torques; the height of said bosses can advantageously be

  adjusted according to the speed of changeover-research-

  chée, as those skilled in the art will readily understand.

  The hanging system works as follows.

  Figure 8 illustrates the relative positions successively

  taken by the imprint 46 and the finger 43 of the spring 34.

  Figure 9 shows in perspective the path 51 traveled by

finger 43 on imprint 46.

  In the successive positions of FIG. 8, it clearly appears that the finger 43 only moves from right to left or from left to right under the combined effects of its stiffness, the bearing surfaces of the imprint 46 and the friction of said finger on the ramps of said imprint, while this imprint, integral with the pusher 9, only moves

from top to bottom and from bottom to top.

  It should also be noted that the initial stress of the spring 34 tends to cause the finger 43 to enter the body 1 and therefore to

  maintain pressure on the footprint ramps.

  At rest, position a, finger 43 presses on ramp 23 and

is substantially center.

- 11 -

  When the pusher is pressed, the range 31 meets the

  finger 43 and move it to the left.

  It slides up on the ramp 23, is then held to the left by the reach 32, position b, crosses the ridge 24 to fall on the ramp 57, position c, where it

  remains until the end of the stroke of pusher 9.

  When the pusher 9 is released, the finger 43 meets the ramp 27 which drives it to the right, crosses the ridge 25 to fall on the ramp 58 and comes to a stop, position d,

  in the V formed by staves 27 and 63, blocking the movement

  cement of pusher 9 which is thus hooked in posi-

tion work.

  When the pusher 9 is pressed again, the bearing surface 33 meets the finger 43 which moves to the left and

  cross the ridge 26 to fall on the ramp 59, position e.

  If the pusher 9 is released again, the bearing 28 pushes finger 43 to the right which then slides, position f, along the bearing 29 by going up on the ramp 21 then crosses the ridge 22 to fall back on the ramp 23, position g, a little before the pusher 9 reaches its

rest position.

  During a new maneuver, the scope 31 will move the finger 43 to the left, whatever its position on the

ramp 23.

- 12 -

Claims (4)

Claims   1. Push-type latching switch,   characterized in that it comprises, in a body of interrup-   tor (1): - tilting contact means comprising a contact plate (16) capable of tilting around two pivots, at least one of which, made of conductive material, is connected to   one of the connection terminals (13, 14, 15) of the interrup-   tor, said plate (16) resting alternately on one of two stops placed on each side of the tilt axis, at least one of which is conductive and connected   to another connection terminal of the switch, the posi-   tilting being defined by the different pressure   of at least two springs (17, 18) of which at least   the length and advantageously the stiffness are different   tes, said springs (17, 18) being compressed by the push button (9) of the switch; -   - means for limiting the stroke of the pusher (9) including   nant a stopper linked to a pawl (12), integral with the push   evening, said pawl serving to lock the pusher (9) in the body (1) of the switch at the time of assembly, said pawl (12) and said stop moving in a light (45) of said body (1), said pawl (12) ensuring the stroke limitation in one direction by abutting against one of the ends of said light (45), said stopper ensuring the stroke limitation in the other direction by abutting against the other end of the light, said pawl (12) comprising a tooth formed by a ramp (61) oriented so that it retracts it during mounting in the body (1) and a stop (62) for limiting stroke;   - attachment means comprising a spring (34) for pre-   wire-shaped ference, having one end fixed to the   body (1) of the switch, said spring being sensitive-   parallel to the direction of movement of the pusher (9) and having its other end folded and forming a finger - 13 -   (43) pressing on a part of the pusher on which there is a set of spans (31, 32, 27, 33, 28, 29, 63) and ramps (23, 57, 58, 59, 21) with which it   cooperates, five of these scopes (31, 32, 27, 63, 39) delimit   both an elevation (65) around which said finger (43) moves under the effect of the movements of the pusher (9), said elevation being delimited on two sides   by two first spans (32, 29) substantially parallel-   in the direction of movement of the pusher (9), a third span (31) joining said two first spans (33, 29) at an acute angle with one of them, and delimiting the third side of the elevation ( 65) facing the finger (43) when the pusher is at rest, two other bearing surfaces (27, 63), forming a V whose point is turned towards the interior of the raised portion (65), delimiting the fourth side of said elevation, a sixth span (33), starting from the junction point of the shorter of the first two spans (32) with one of the spans (27) of the V, being substantially perpendicular to said span (27) of the V , lower than said span, and delimiting with the V a kind of hollow, a seventh span (28), substantially perpendicular to the sixth span (33) and starting from the junction point of the second parallel span (29) and the second bearing (63) of the V,   delimiting an area even lower than said hollow.   2. Latching switch according to claim 1, characterized in that it comprises: - a hollow body (1) preferably cylindrical itself comprising two sliding surfaces (64 and) and an opening (45); - A pusher (9) provided with a flange (10) sliding in the seat (65), a cylindrical part sliding in the seat (64) and a pawl (12) itself comprising at least one ramp (61) and at least one staff (62), - 14 -   the assembly of the sliding pawl (12), after mounting in the opening (45), ensuring the guidance and the limitations of stroke of the pusher (9).   3. Latching switch according to one of the preceding claims 1 or 2, characterized in that the contact means comprise: - at least two conductive blades and preferably three (13, 14 and 15), the outer ends of which to the body   (1) are provided with connection means, the inner end   of a blade (13) being preferably pointed, the ends of the other blades being preferably rounded, the three blades being fixed substantially parallel to the axis (2) of the switch in the part (8) of the body ( 1) opposite its part (3) o is the pusher, the position of said blades being substantially located on a circle and 120 from each other;   - a pin (39), preferably parallel to the axis (2), solid   daire of the interior bottom of the part (8) of the body (1), the top of which, advantageously in the shape of a cone, is situated substantially at the same height relative to said bottom as the top of the blade (13); - A contact plate (16) provided with two recesses, one (53) conical, the other (54) in V whose edge, directed towards the conical hollow (53), forms with this a straight line tilt (47) placed substantially in the middle of said plate (16) also provided with two pairs of bosses (48   and 48a), (49 and 49a), each pair being aligned parallel-   Lement to the pivot axis (47), and placed one on one side and the other on the other side of said axis (47), each element of each pair being placed on either side   an opening (52) pierced substantially perpendicular-   ment to the axis (47) in said contact plate (16); - two guides (19 and 20), cylindrical, parallel to the axis (2) of the pusher (9), integral with the latter, and sliding -2616265 - 15 -   in housing (41 and 42) whose entry is advantageous   flared and which are integral with the part (8) of the body (1); - two springs (17 and 18) threaded on the guides (19 and 20) and whose lengths and stiffnesses are different to allow tilting of the contact plate (16).   4. Snap switch according to one of the claims   cations 1 or 2 above, characterized in that the attachment means are composed of: - a spring (34) provided with a finger (43) fitted into a hole (38) drilled in the part (8) of the body ( 1), held by a groove (55) terminated by a flare (56) made in said body (1) parallel to the axis (2) and of which said finger (43) penetrates into a slot (44) of the body (1 ) to press an imprint (46); - an imprint (46), preferably molded on the part (11) of the pusher (9) and comprising bearing surfaces and ramps acting successively on the finger (43) to deflect it or to repel it, namely: the imprint being seen from the front, a bearing (31) deviating the finger (43) to the left when the pusher descends, a bearing (32)   holding the finger (43) to the left, a ramp (23) goes up   both the finger during the descent of the pusher (9) and terminated by an edge (24) beyond which, at the end of the stroke of the pusher, the finger falls on the ramp (57), a bearing (27) bringing the finger to the left when the pusher is released and begins to go up, said bearing surface (27) forming a V with the bearing surface (63), an edge (25) crossed by the finger before arriving at the bottom of said V, the finger falling on a ramp (58), a span (33) deflecting the finger to the right when the pusher (9) descends, an edge (26) that the finger (43) crosses during this new descent and which borders a span (28 ) which deflects the finger even further to the right during the - 16 -   next push up (9), one reach (29) now   finger (43) to the right during this last ascent   tee, during which said finger goes up on a ramp (21) before crossing an edge (22) to fall back on the ramp (23) and start the cycle again.