JPS63119117A - Positioning switch with forcibly opening contact - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a positioning switch, more particularly comprising an insulated control pushbutton housed in a casing, a contact bridge and an opening lever, The contact bridge is moved between a rest position in which the contact bridge IJ is carried by two fixed contacts and a fixed position in which the contact bridge IJ is carried by two fixed contacts by means of bistable elastic means acting between a movable assembly carrying the contact bridge and an insulating pushbutton. be capable of rapid movement to and from an actuation position located at a distance from the contact and designed to break any tight contact between said contact bridge and said stationary contact during movement of said contact bridge; said aperture lever, which is adapted to pivot about an axis substantially parallel to said contact bridge, is configured to engage one end of said lever with a central area of said contact bridge in a direction that moves said contact bridge away from a stationary contact. In order to cooperate, the present invention relates to a positioning switch which is actuated by a pushbutton when said pushbutton reaches a particular position.

The term "positioning switch" here refers to a quiz switch that detects the end of a traveling section, and more generally refers to a switch that is sensitive to the position of a movable element.

<Prior Art> As mentioned above, Hiko type switches ensure that the contact bridge opens if the switch becomes stuck or welded to the fixed contacts, resulting in, for example, an accidental short circuit. It has many uses in equipment that requires constant use. An example of such a device is disclosed in French Patent Specification No. 2 241 132, in which one contact bridge is jerked as described above. In such known switches, the forced opening lever is held by a pivot on the pushbutton so that it can be tilted about the pivot and, before reaching the aforementioned specific position, the forced opening lever is held by a pivot on the pushbutton, and before reaching the aforementioned specific position, the forced opening lever is Converts the movement of the lever from translation to rotation. In this case, the angle through which the lever rotates is relatively small, and the lever is required to have increased motion amplification capability. The motion amplification capability increases the amount of excess force that must be applied to the pushbutton to produce a forced opening, and it increases the amount of excess force that must be applied to the pushbutton to produce a forced opening; proportionally increase the unavoidable geometrical tolerances caused by

PROBLEM TO BE SOLVED BY THE INVENTION The present invention provides an advantageous solution to the forcible opening lever by locating the forced opening lever in a position where the lever can have relatively large dimensions and therefore can have relatively high precision. The object of the present invention is to improve the known device in order to increase the accuracy of the movement of the device and reduce the excessive force required to produce forced separation.

Means for Solving the Problems> In order to achieve the above object of the present invention, according to the present invention,
The opening lever is rotatably mounted on a bearing arranged in a rest area of the casing near a plane extending substantially through the surfaces of the plurality of contacts, the opening lever being rotatably mounted over its entire travel distance. a first end associated with a push button for effecting movement of the opening lever between the two ends and a second end for moving the contact bridge in the opposite direction without a substantial increase in movement.

When the contact bridge is forced open and the two levers have first ends located on either side of the push button, the first end is opened by a lateral pressing force transmitted to the second end. There are already several known switches that transfer power to parts. In this known device, the space in which the two levers are arranged is limited, so that the two levers have to be made small, with the result that they are rather fragile and the push button is not as expected. The position that will produce the effect is not clearly defined.

<Examples> The present invention will be described in detail below with reference to the accompanying drawings showing examples of the invention.

The switch according to the invention comprises a casing 3 schematically shown in dashed lines.
1, which extends into the casing 31 through the top opening 33 of the casing 31 and is driven by an external drive for longitudinal movement in directions F and G along the axis An actuated pushbutton 1 is provided. The external drive actuates the pushbutton from its rest, i.e., inactive, position while compressing and releasing a return spring located between one end 34 and the opposite end 35 of the case. Move to position A or vice versa.

First lateral bearing means, indicated at 2, are provided on the push button symmetrically with respect to a longitudinal plane PP' passing through the center of the push button, and transmit compression to the end of the device, indicated at 3. One line of action of the device 30 is shown in dashed lines.

These devices are known per se and can take various forms, such as the spring jack illustrated in FIG. It has the property of rapidly releasing or recovering the energy stored in it. The carrying means 2 can thus be parallel edges covering a notch, such as 82, formed in one end of the device 3, so that each carrying means forms a pivot for the device 3 with which it is associated. .

For example, the second support means 4, which is a parallel edge receiving the opposite end of the device 30, is arranged symmetrically with respect to the plane PP' and has a partition wall 5 parallel to the axis ■' and perpendicular to the plane PP'. An insulating assembly or movable cage 90 portion is formed comprising two parallel fins 6, 7 perpendicular to the axis ``2''. The fins have bends 8a, sb facing each other in the same plane and forming open recesses, each of the four parts receiving a respective conductive contact bridge 10.11. The partition wall 5 is wide enough to support the carrier means 4 on the rear surface of the partition wall 5 on the side remote from the fins 6,7.

At its ends, each bridge carries a contact stud pointing away from the other bridge. The two sufrads on Brizo10 are placed on the plane Q2
fixed contact surfaces. When the two studs on the bridge 10 leave the plane Q, the two studs on the bridge 11 can touch two other fixed contact surfaces. One fixed contact surface is shown as 90 located in plane R. These two planes Q,
R is perpendicular to the axis ■'.

The insulating intermediate component 12.13 is pressed against the contact bridge in directions F and G and is guided along the cage (e.g. along the bends 8a, 8b), with one piece arranged between the intermediate components. The bridge is subjected to a pressing force in the opposite direction created by the compression spring 14 of the bridge. The cage 9 has a stable bottom resting position J and a stable top stable position R.
Due to the presence of a bidirectional stabilizer 3, which can be moved parallel to the axis C' in the plane T between When moving in , the cage moves rapidly in the G and F directions. In direction F, ie when the button is pressed and starts from a rest position, a sudden movement occurs when the button is in a particular position E.

In the final position of these movements, the contact bridge 11 is pressed against the fixed contact when the cage 9 is in the rest position J, and the contact bridge 10 is pressed against the fixed contact when the cage 9 is in the working position H.

The rest position and the working position are determined when the cage rests on its respective support on the casing 31.

As shown in FIG. 1, the moving distance d3 of the push button is longer than the moving distance d2 of the cable.

Also, the magnitude of the travel distance d2 of the cage and the short distance d between the open travel and the fixed contacts are chosen such that the contact pressure is provided by additional compression of the spring 14.

For example, d = l shout, d2-2.3 theory, d3 = 6.75 kaku.

If a moving contact on the bridge 11 is brought into close contact with a corresponding fixed contact stud at a cage position JK, the two protrusions or edges 2, 4 are aligned in that position. When the pushbutton reaches a certain equilibrium position E, where it has overstepped in the F direction, it is not possible to make a sharp switching movement of the car in the G direction. This impossibility is due to the inability of the device 3 to generate sufficient force on its own to break the contact point.

In order to lift the cage 9 by force and thus break the seal, the lever 24 receives a pressing force from the end 35 of the button 1 and, if the cage remains stationary, applies a pressing force in the appropriate direction to the cage. Convey.

The lever 24 is arranged along an axis parallel to and/or close to the plane R corresponding to the adjacent bulkhead 36 of the casing.
9.29' with two bearings received in a bearing (compare Figure 3). The lever 24 further has a central control arm 19 which engages between two parallel fins 35' of the end 35 and which
5' two laterally parallel drive grooves 15,16
It has two laterally oppositely extending cylindrical projections 17, 18 which are associated with each other.

At the other end of the arm 19, the lever 24 comprises a central lifting arm 20 having an actuating surface or edge 23 located opposite the lower surface 38 of the cage. The length b2+b1 of the lever is chosen such that the force required to break the seal is greater than or substantially equal to the force that must be transmitted to the push button to create that force.

In other words, the lever 24 does not magnify the movement received from the push button 1.

Distance between support stand 28 and plane R, axis YY' and plane R
Due to the short distance between them, the device is very precise in that it is located directly below a particular operating point K, namely point E, and to which point the cage is forced to be lifted.

In another embodiment shown in FIG.
two laterally parallel grooves 15 arranged on both sides of the
a, 16a, lever 24a has two lateral control arms 19a, 1.9b, arm 1
The ends of 9a and 19b are cylindrical mating studs 17a and 18a facing each other. As in the previous case, the central position of the arms produces a balanced pressing force on the cage, which is the same as the cage in the previous example. In this embodiment, the inner side of the end 35a is left unused and can be used as a recess 39 opening towards the casing wall 24 for receiving and guiding the return spring 26a.

As an example, lever 24. a is formed in the cylindrical shape of the lever 24a between the arm 20a and each of the arms 19a and I'lb, and has two bearings 29a with one end open.
, 29b, and can be rotated about the axis YY'. The two bearings are provided on two ribs fixed to the partition wall 36. Apart from this, the lever 24a
It may be pivoted supported by the pivot of FIG. 1 which is received in an open half bearing at one end fixed to the bulkhead 36.

In the two aforementioned embodiments, the components and means 1,
2, 3.4 extend through the axis bean' and move in the same plane S parallel to the plane T in which the movable assemblies 9, 30 move.

In the embodiment 60 shown in FIG. 5, the push button 50 has a lateral projection 51 formed with lateral edges 52, 53 which serve the same purpose as the edges in the previous embodiment. The elastic non-stable compression means 54 and the bistable release means 55 are arranged in the same plane T' as the insulating cage 56 and its corresponding edges 58,59.

The cage thus carries opposed contact bridges 61, 62 which in this case allow the projection 51 to move through the central recess 57, these contact bridges comprising a transverse partition 63 at the top of the cage and a transverse partition at the bottom. It is fixed to the outer surface of the directional partition wall 64.

The force-applying aperture lever 65, which is open on one side, has a function and properties similar to the previously described lever 24.24a, but uses different pivoting means.

In this case, the two lifting arms 66, 67 are two parallel arms placed on either side of a central pivot 700 which is received in the open shaft at one end on the lip 72 of the casing 73.

When close contact occurs, the two arms 66, 67 are exposed by the contact bridge 62 to two symmetrical resisting forces in the F direction. The advantage of arms 66,67 is that two force systems are balanced against one bearing. 2 controls 7
The studs 78, 79 which are supported towards each other by 6,77 cooperate with transverse grooves 80, 81 in the push button. The studs 78, 79 are continuously engaged within the grooves 80, 81.

In this example, cage position H and cage position J
is determined by the contact bridge when carried on the respective fixed contact (not shown) and, as before, the axis line is determined by the contact bridge 6 on the side closer to the forced opening arm.
Fixed contacts cooperating with 2 'are placed near a plane extending through the surface.

In both embodiments, a surface portion or edge 23, 23a or 66.67 indicating the end of the lifting arm
is aligned with the axis YY' (the second (See Figures 1, 2 and 5)
said substantially cylindrical surface 74 . ．． 74
It is extended by a or 75. γ1 at the edge 66
．． 67 and the axis YY', and γ2 is the arm 76.
Given a nominal dimension of 77, a reduction ratio γ1/γ2 is established between the travel distance of the push button and the travel distance transmitted to the contact bridge 62. A particular advantage of positively holding the cage in position H is that if the bistable means or device breaks in this position, the respective contacts are prevented from being closed again. For this purpose, the bottom surface 38a of the cage 9 has a recessed surface 86, as shown in FIG.
The four-part surface 86 has a surface 8 beyond the protrusion 86.
6 cooperates with the rounded surface 74a after being traversed by the edge 23a.

In both embodiments, the movable cage is guided laterally, held by elastic bistable means or oppositely symmetrical force-applying components of the device. The pushbutton and the casing wall, such as 36, provide additional guidance only in the event of a sharp impact.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main components of a switch actuating device according to the invention, shown with the casing removed; FIG. 2 is a coupling means between the switch pushbutton and the force-applying aperture lever; FIG. 3 is a cross-sectional view of a secondary elastic bistable compression device for use with either of the devices of FIGS. 1 and 5;
The figure shows that the casing is in the symmetry plane PP defined in FIG.
5 is an exploded perspective view of a modified embodiment of the invention, and FIG. 6 shows the casing and cage cut at the symmetry plane PP' of FIG. 6 is a side view of the switch according to FIG. 5, shown in FIG. 1, 1a, 50...Push button, 9, 56...
...Assemble, 11.62...Contact bridge, 1
7, 18. 17a, 18a, 78, 79...first end, 20, 20a68.69...second end, 24,
24a, 65...opening lever, 29, 29',
29a, 29b, 71-Bearing.

Claims (1)

[Claims] 1. Insulated control push buttons (1, 1a, 50) housed in a casing and contact bridges (11, 62)
) and an opening lever (24, 24a, 65), said contact bridge (11, 62) acting between a movable assembly (9, 56) carrying the contact bridge and an insulating pushbutton. The contact bridge is moved suddenly between a rest position, in which it is carried by two fixed contacts (90), and an operating position, in which it is arranged at a distance from said two fixed contacts, by means of bistable elastic means that possible and designed to break any tight contact between said contact bridge and said stationary contact during movement of said contact bridge to rotate about an axis substantially parallel to said contact bridge. The opening lever (24, 24a, 65
) is moved by the push button when the push button reaches a certain position (K) in order to cause one end of the lever to cooperate with the central area of the contact bridge in the direction of moving the contact bridge away from the fixed contact; In a switch; a plane (R
) located in the stationary area of the casing near the bearing (2
9, 29'; 29a: 29b: 71), the opening lever (24, 24a, 65) is rotatably mounted,
The opening lever has a first end (17, 18; 17a, 18a; 78) associated with a push button (1; 1a; 50) for effecting the movement of the opening lever during its entire travel distance.
, 79) and the contact bridge (1
1, 62) in the opposite direction;
a; 68, 69). 2. The first contact bridge (11) and the second contact bridge (10) are carried by a movable assembly (9), which assembly (9) is movable in the plane (T) and Claim 1, characterized in that it has an extension (4) made to move in a parallel plane (S) containing a button (1, 1a) and a bistable elastic means (3). Position switch as described. 3. The positioning switch according to claim 2, characterized in that said contact bridges (11, 10) receive pressing forces in opposite directions from a common contact pressing spring (14). 4. The first contact bridge (62) and the second contact bridge (61) are carried by a movable assembly (56), which assembly is movable in a plane (T') and Claim 1 characterized in that it has a recess (57) that allows the movement of the lateral extension (51) of the push button which is movable at the same time and in the same plane as the stabilizing elastic means (54, 55). The positioning switch described in item 1. 5. one second arm (20a) arranged in the central plane (PP') in which said opening lever (24a) houses a push button (1a) and a movable assembly (9); The positioning switch according to claim 1, characterized in that it has two parallel first arms (19a, 19b) arranged symmetrically with respect to the position switch. 6 two bearings (29, 29'; 29a, 29 carried by the wall of the casing (36) near the assembly (9) on which said opening lever (24, 24a) is movable;
6. The positioning switch according to claim 5, wherein the positioning switch is rotatably mounted on the positioning switch (b). 7. The second arm (20, 20a; 68) has a cylindrical surface (74, 75) coaxial with the axis (YY') of the bearing.
an actuating edge or side (23,
23a, 66), the positioning switch according to claim 5. 8. The first end (17, 18; 17a, 18a; 78, 79) of said opening lever (24; 24a; 25) is connected to at least one transverse groove (15, 16; 15) of said push button
A, 16a; 80, 81) The positioning switch according to claim 1, wherein the positioning switch is housed in the position switch.