WO2022180331A1 - Commutateur bistable destiné à être incorporé dans un aéronef - Google Patents
Commutateur bistable destiné à être incorporé dans un aéronef Download PDFInfo
- Publication number
- WO2022180331A1 WO2022180331A1 PCT/FR2022/050301 FR2022050301W WO2022180331A1 WO 2022180331 A1 WO2022180331 A1 WO 2022180331A1 FR 2022050301 W FR2022050301 W FR 2022050301W WO 2022180331 A1 WO2022180331 A1 WO 2022180331A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- leaf spring
- switch
- frame
- relative
- control means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
- H01H21/30—Operating parts, e.g. handle not biased to return to a normal position upon removal of operating force
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
- H01H19/20—Driving mechanisms allowing angular displacement of the operating part to be effective in either direction
- H01H19/24—Driving mechanisms allowing angular displacement of the operating part to be effective in either direction acting with snap action
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/04—Cases; Covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
- H01H23/02—Details
- H01H23/12—Movable parts; Contacts mounted thereon
- H01H23/16—Driving mechanisms
- H01H23/20—Driving mechanisms having snap action
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
- H01H5/20—Energy stored by deformation of elastic members by flexing of blade springs single blade moved across dead-centre position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
- H01H23/24—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button with two operating positions
Definitions
- TITLE Bistable switch intended to be incorporated in an aircraft
- the present invention relates to a bistable switch, and more particularly to a switch intended to be incorporated into an aircraft, in particular within the command or control systems of such an aircraft.
- aircraft may include a bistable rocker switch, also designated by the Anglo-Saxon name “bi-stable toogle”, as is frequently the case in landing gear controls.
- Aircraft can also include a rotary bistable switch, also referred to as the English name “rotary”, for example for maneuver prohibition switches.
- a function provided by a bistable switch consists in having two stable positions corresponding to the two control positions of the switch. For example, in the case of a landing gear extension command, a stable position corresponds to the “landing gear extended” position and a stable position corresponds to the “landing gear retracted” command.
- the function of the bistable switch is to avoid the existence of a third position of stable equilibrium which would harm the reliability of the control.
- a bistable switch known from the prior art, schematically illustrated in FIG. 1, can comprise a control lever 2 capable of pivoting about an axis 4 with respect to a terminal 6.
- a lower end of the lever is coupled to a first roller 8 in point or linear contact with a second roller 10.
- a flexible rod 12 is fixed by its lower end to a frame integral with the terminals 6.
- the roller 10 is slidably mounted on the rod 12.
- a spring 14 acting in compression maintains the roller 10 at the level of the upper end of the rod 12 and in point or linear contact with the roller 8.
- roller 10 When this mechanism is in position I, roller 10 is pressed by spring 14 between a wall of terminal 6 and roller 8. Under these conditions, roller 10 is in a position of stable equilibrium. In other words, position l is a stable equilibrium position of control lever 2.
- the roller 10 When a user manipulates the control lever 2, he pivots the latter counterclockwise and the mechanism is in the intermediate position II. In this position, the spring 14 pushes the roller 10 against the roller 8 and the forces exerted on the roller 10 are directed vertically and cancel each other out. In this way, the roller 10 is in a position of equilibrium. However, a disturbance, for example a rotation of the control lever 2, tends to move the roller 10 away from the equilibrium position IL. In other words, the position II is an unstable equilibrium position of the control lever 2.
- Position III the rollers 8 and 10 and the control lever 2 are symmetrical to the position I, with respect to the vertical plane containing the axis 4. As a result, the roller 10 is stable between the spring 14, the terminal 6 and the roller 8. Position III is a position of stable equilibrium of the control lever 2.
- Figure 2 schematically illustrates a second example of a mechanism incorporated in a switch. As in the case of Figure 1, three positions I, II and III are illustrated in Figure 2, the mechanism being for each position illustrated in front view and in top view. Identical elements bear the same references.
- the terminal 6 comprises four pillars 16 distributed in a rectangular manner.
- the lower end of the lever 2 is attached to two tongues 18 and 20 which are rigid and capable of pivoting about a vertical axis.
- a spring 22 acting in traction tends to bring the opposite ends of the tabs 18 and 20 closer together.
- position I When the mechanism is in position I, the tongues 18 and 20 are in linear contact with the two pillars 16 located on the right (compared to the views of FIG. 2).
- Spring 22 tends to reduce the angle between tabs 18 and 20 and thereby presses tabs 18 and 20 on the respective pillars 16. Therefore, the tabs 18 and 20 are in a stable position. In other words, position I is a stable equilibrium position of control lever 2.
- Position II is an intermediate position in which the control lever 2 is vertical. In this position, tabs 18 and 20 have pivoted and are oriented in the same direction perpendicular to axis 4. In this position, the tensile force exerted by spring 22 is oriented in the direction of tabs 18 and 20. It follows that the spring 22 does not modify the position of the tongues 18 and 20. The tongues 18 and 20 are then in a position of equilibrium. However, a disturbance, for example in the form of a rotation of the control lever 2, modifies this state and tends to move the tongues 18 and 20 away from the position of equilibrium. In other words, position II is an unstable equilibrium position of control lever 2.
- Position III tabs 18 and 20 and control lever 2 are symmetrical to position I, with respect to the vertical plane containing axis 4. As a result, tabs 18 and 20 are maintained in linear contact against the pillars 16 located on the left (compared to the views of Figure 2) by the spring 22.
- Position III is a position of stable equilibrium of the control lever 2.
- the invention aims to remedy the aforementioned drawbacks.
- the invention aims to provide a bistable switch with improved switching reliability.
- a bistable switch intended to be incorporated in an aircraft comprising a frame, at least one detection means and a control means intended to be manipulated by a user, the control means being movable relative to the frame between a first control position and a second control position.
- this switch comprises a leaf spring mechanically connected to the frame and to the control means, the leaf spring being arranged in a buckling state and configured to achieve adopting a first stable buckling position when the control means control is in the first control position and to adopt a second stable buckling position when the control means is in the second control position, the at least one detection means being configured to detect the current control position and to emit a electrical control signal.
- Such a switch makes it possible to avoid the appearance of forces directed along the same axis. This results in the absence of an intermediate equilibrium position, which improves the reliability of the commutation.
- the leaf spring has a thickness of between 0.05 mm and 0.25 mm.
- Such a characteristic makes it possible to obtain a snapping sound when passing from one buckling position to another, which improves the feeling of the user.
- the switch may comprise at least one electrical contact surface integral with the frame forming the detection means, the leaf spring being made of an electrically conductive material, the switch comprising means for flowing electric current through the leaf spring, the leaf spring being arranged such that it is in electrical contact with an electrical contact surface only in at least one of its two stable buckling positions
- rocker and at least one button forming a detection means, the rocker being capable of pivoting relative to the frame, and being mechanically connected to the leaf spring so as to form a kinematic chain with the leaf spring and the frame, the rocker moving from a first position when the leaf spring is in a buckling position to a second position when the leaf spring is in the other buckling position.
- the leaf spring comprises a proximal end portion with respect to the control means and a distal end portion with respect to the control means, the rocker comprising a rectilinear portion and a cavity delimited by the rectilinear portion, the cavity being adapted to receive the distal end portion.
- the pendulum comprises two lateral extensions extending in the same direction perpendicular to the rectilinear portion and intended to activate at least one button.
- the frame comprises a surface parallel to an axis of rotation of the balance relative to the frame, a button being able to detect the proximity or the direct contact of a lateral extension of the balance beam with the parallel surface.
- control means comprises a control lever capable of pivoting relative to the frame around a direction perpendicular to the plane of flexion of the leaf spring.
- control means comprises a first part capable of pivoting relative to the frame around a direction perpendicular to the direction of flexion of the leaf spring.
- the switch comprises a second part movable in translation relative to the frame and interposed between the first part and the leaf spring, the first part (94) and the second part (100) being configured to transform a rotational movement of the first part relative to the frame in a translation movement of the second part relative to the frame.
- a rotary switch having the above advantages is thus provided.
- such an arrangement makes it possible to achieve the mechanical connection between the first part and the leaf spring in a simple manner, in the case of a rotary switch.
- FIG 3 illustrates a first position of stable equilibrium of a switch according to a first embodiment of the invention
- FIG 4 schematically illustrates a second position of stable equilibrium of the switch of Figure 3
- FIG 5 schematically illustrates a first stable equilibrium position of a switch according to a second embodiment of the invention
- FIG 6 is a detail view of the switch in Figure 5
- FIG 7 schematically illustrates an intermediate position of the switch of Figures 5 and 6,
- FIG 8 is a detail view of the switch in the position of Figure 7,
- FIG 9 schematically illustrates a second position of stable equilibrium of the switch of Figures 5 to 8,
- FIG 10 is a detail view of the switch in the position of Figure 9,
- FIG 12 schematically illustrate two stable equilibrium positions of a switch according to a third embodiment
- FIG 13 is a front view schematically illustrating a first stable equilibrium position of a switch according to a fourth embodiment of the invention.
- FIG 14 is a top view of the switch in the equilibrium position of Figure 13,
- FIG 15 is a front view schematically illustrating a second stable equilibrium position of the switch of Figures 13 and 14, and
- FIG 16 is a top view of the switch in the position of Figure 15.
- Switch 24 is intended to be incorporated into an aircraft cockpit.
- switch 24 is an aircraft landing gear output switch.
- the switch 24 notably comprises a frame 26.
- a direct orthonormal vector base 28 attached to the frame 26 is defined.
- the vector base 28 consists of a vector X, a vector Y and a vector Z.
- the terms “lower”, “upper”, “vertical”, “horizontal”, “top”, “bottom”, “below”, “above” and their derivatives will be understood as referring to the direction and direction of the Z vector when the frame 26 is normally placed on a flat horizontal surface, that is to say when the Z vector is vertical and directed upwards.
- the frame 26 comprises a base 30 and an armature 32.
- the base 30 comprises an upper surface 31 perpendicular to the vector Z.
- the switch 24 comprises a control lever 34 intended to be manipulated by a user, in this case a pilot of the aircraft.
- the control lever 34 is mechanically connected to the armature 32 so as to be able to pivot, relative to the frame 26, around an axis 36 parallel to the vector X. In this way, the control lever 34 is movable between a first control position illustrated in Figure 3 and a second control position illustrated in Figure 4.
- the frame 26 comprises three electrically conductive paths 38, 40 and 42 vertical and arranged respectively in the middle and on each side of the base 30.
- the path 38 extends to the upper surface 31.
- the paths 40 and 42 are longer and extend vertically projecting through the upper surface 31 then to midway between the base 30 and the axis 36.
- the paths 40 and 42 each comprise a horizontal protrusion 44 extending in the direction of the central path 38
- the protrusion 44 terminates in a vertical surface 46.
- the protrusion 44 and the surface 46 are made of an electrically conductive material, preferably the same as that used to form the electrically conductive paths 38, 40 and 42.
- the control lever 34 includes a lower portion 48 located below the axis 36.
- the portion 48 includes a rectilinear groove 50 extending in the longitudinal direction of the portion 48 from a lower front surface of the portion 48.
- the switch 24 includes a leaf spring 52.
- the leaf spring 52 is mechanically connected by a pivot link to the base 30 and mechanically connected by a pivot link to the portion 48.
- leaf spring 52 is electrically connected with electrically conductive path 38.
- a lower end of leaf spring 52 may be welded to conductive path 38.
- An upper end of leaf spring 52 may be inserted into groove 50.
- leaf spring 52 has a thickness of between 0.05 mm and 0.25 mm, preferably between 0.1 mm and 0.2 mm. Such a thickness of the leaf spring 52 makes it possible to obtain flexibility avoiding premature fatigue of the leaf spring 52 and to obtain a snapping sound when passing from one buckling position to another buckling position.
- Leaf spring 52 is, in the example shown, made from stainless steel. Stainless steel is preferably cold rolled for work hardening and in the spring condition C1300 or C1700. Due to the choice of a stainless steel and its mechanical and electrical connection with the conductive path 38, electric current can flow through the spring 52.
- leaf spring 52 is disposed in a buckling state.
- a buckling state corresponds to a state of compression of the leaf spring 52 along its length beyond a predefined buckling limit value resulting in a transverse deformation, according to its thickness.
- a buckling position corresponds to a position taken by the leaf spring 52 during its buckling, on one side or the other of a median plane. In this case, the mid-plane is perpendicular to vector Y and contains axis 36. The bending of leaf spring 52 occurs in a plane perpendicular to vector X.
- a switch is provided having two positions of stable equilibrium and making it possible, respectively, to electrically connect the conductive path 38 to the conductive paths 40 and 42.
- the leaf spring 52 moves from one buckling position to the other so that either of the electrically conductive paths 40, 42 is connected with the central electrically conductive path 38 via the projections 44 and the leaf spring 52. It is thus possible to control the retraction or extension of a landing gear of the aircraft.
- the leaf spring prefferably in electrical contact with an electrical contact surface in the two stable buckling positions, the switch delivering an "open" signal in one position and a "closed” signal in the other position.
- the switch delivering an "open" signal in one position and a "closed” signal in the other position.
- one of the paths 40 and 42 being electrically insulating. In this case, one of the positions of stable equilibrium of the control lever 34 electrically connects the two electrically conductive paths, while the other position of stable equilibrium disconnects them.
- FIG. 5 to 10 there is schematically shown a switch 54 according to a second embodiment of the invention. Identical elements bear the same references.
- Switch 54 differs from switch 24 in that it lacks conductive paths 38, 40 and 42. Instead, the switch is provided with two-button sensing means 70, 72 for emitting an electrical signal when pressing on their surface.
- the base 30 has a surface 34 on which an insert 58 is fixed, the two buttons 70 and 72 being arranged on the surface 31 on either side of the insert 58.
- Switch 54 comprises a rocker arm 56 mounted to pivot with respect to insert 58 around an axis 60.
- Axis 60 is parallel to vector X.
- Axis 60 is located in the median plane perpendicular to vector Y and containing the axis 36.
- the axis 60 is vertically offset upwards with respect to the upper surface 31, by a vertical offset ⁇ 60.
- the offset ⁇ 60 and the length of the lateral extension 68 result in the angle of incidence making it possible to estimate the compression force applied to the two buttons 70 and 72.
- the offset ⁇ 60, the length of the lateral extensions 68 and of the straight portion 62 are determined according to the minimum effort required to operate a button 70.72 and according to the length of the leaf spring 52 employed.
- the balance 56 comprises a rectilinear portion 62 provided with a cavity 64 forming a rectilinear groove.
- the balance 56 comprises a lateral extension 66 and a lateral extension 68.
- the lateral extensions 66 and 68 extend respectively on either side of the rectilinear portion 62, perpendicular to the rectilinear portion 62.
- the extensions 66 and 68 have a same length l6668, In this way, the balance 56 is able to pivot about the axis 60, relative to the frame 26, between a position in which the end of the extension 66 is in contact with the surface 31, and a position in which the end of extension 68 is in contact with surface 31.
- buttons 70 and 72 then detect the proximity of the respective side extensions 66 and 68 with the surface 31.
- the leaf spring 52 includes a central portion 74, an upper portion 76 and a lower portion 78.
- the upper portion 76 is received in the groove 50 of the portion 48 of the control lever 34.
- the lower portion 78 is received in the cavity 64 of the rocker arm 56.
- the portions 76 and 78 may include ends forming a winding to facilitate their reception in the groove 50 and the cavity 64, respectively.
- a kinematic chain is produced between, in succession, the control lever 34, the leaf spring 52, the balance 56 and the frame 26.
- a mechanical pivot connection is produced between the lever control 34 and the leaf spring 52 and a mechanical pivot connection is made between the leaf spring 52 and the balance 56.
- the leaf spring 52 In the position illustrated in Figures 5 and 6, the leaf spring 52 is in a buckling state towards the button 72. As a result, the end of the extension 68 comes into contact against the button 72. When this occurs, it is no longer possible to pivot the balance wheel 56 clockwise and the spring 52 is in a position of stable equilibrium. More particularly, with reference to FIG. 6, the upper end of the leaf spring 52 exerts a force F1 on the portion 48 of the control lever 34, which causes a torque C1 around the axis 36. The boundary zone between the central portion 74 and the lower portion 78 of the leaf spring 52 exerts a force F2 on an upper end of the rectilinear portion 62 of the balance 56.
- a lower end of the leaf spring 52 exerts a force F3 on the rectilinear portion 62 of the balance 56
- the forces F2 and F3 generate a torque C2+C3 around the axis 60.
- the button 72 exerts a vertical force F4 on the end of the extension 68, which results in a torque C4 opposite to the torque C2+C3.
- the pendulum 56 is in a stable equilibrium position of contact with the button 72 and a torque tends to oppose a clockwise rotation of the control lever 34.
- FIG. 8 illustrates an intermediate position between the positions of FIGS. 5 and 9.
- an upper end of the leaf spring 52 exerts a force F1 on the portion 48 of the control lever 34
- the boundary zone between the central portion 74 and the upper portion 76 exerts a force F2 on a lower end of the portion 48 of the control lever 34.
- a boundary zone between the central portion 74 and the lower portion 78 exerts a force F3 on an upper end of the rectilinear portion 62 of the balance 56
- a lower end of the leaf spring 52 exerts a force F4 on the rectilinear portion 62 of the balance 56.
- FIGS. 9 and 10 schematically illustrate switch 54 in another stable equilibrium position.
- This stable equilibrium position is symmetrical, with respect to the median plane, to the stable equilibrium pressure of FIGS. 5 and 6.
- the leaf spring 52 is in a state of buckling in the direction of the button 70.
- the end of the extension 66 comes into contact against the button 70.
- the upper end of the leaf spring 52 exerts a force F1 which causes a torque Cl around of the axis 36.
- the boundary zone between the central portion 74 and the lower portion 78 of the leaf spring 52 exerts a force F2.
- the lower end of leaf spring 52 exerts a force F3.
- the forces F2 and F3 generate a torque C2+C3 around the axis 60.
- the button 70 exerts a vertical force F4, which results in a torque C4 opposite to the torque C2+C3.
- the pendulum 56 is in a stable equilibrium position of contact with the button 70 and a torque tends to oppose a counterclockwise rotation of the control lever 34.
- FIGS 11 and 12 illustrate two stable equilibrium positions of a switch 80 according to a third embodiment of the invention. Identical elements bear the same references.
- Switch 80 differs from switch 54 in that frame 26 has two electrically conductive paths 82 and 84.
- Path 82 passes through base 30 until upper surface 31 is in electrical contact with rocker arm 56.
- Rocker arm 56 is made of an electrically conductive material, which makes it possible to establish an electrical connection between the path 82 and the leaf spring 52.
- the path 84 passes through the base 30, extends along the armature 32, then passes from the armature 32 to the control lever 34.
- Switch 80 further differs from switch 54 in that control lever 34 has a light emitting diode 86 on its upper end. Path 84 is electrically connected to one terminal of light emitting diode 86.
- Switch 80 further differs from switch 56 in that control lever 34 includes an electrically insulating path 88 and an electrically conductive path 90.
- electrically insulating path 88 is interposed between the portion of electrically conductive 84 located on the control lever 34 and the electrically conductive path 90.
- a slice located to the right of the thickness of the control lever 34 and above the axis 36 includes the electrically conductive path 84, a central portion of the control lever 34 and the part located to the right of the groove 50 comprises the electrically insulating path 88 and a portion located to the left of the control lever 34 and the part located to the left of the groove 50 comprises the electrically conductive path 90.
- a second terminal of the light-emitting diode 86 is electrically connected to the electrically conductive path 90 .
- the leaf spring 52 In the equilibrium position of FIG. 12, the leaf spring 52 is in contact with the electrically insulating path 88. This results in the absence of an electrical connection between the path 82 and the light-emitting diode 86. As a result, only one terminal of the light-emitting diode 86 is supplied with electrical energy and the light-emitting diode 86 is off.
- FIGS 13, 14, 15 and 16 schematically illustrate stable equilibrium positions of a rotary switch 92 according to a fourth embodiment of the invention. Identical elements bear the same references.
- Switch 92 differs from switch 24 of Figures 3 and 4 in that vertical surfaces 46 are part of electrically conductive paths 40 and 42.
- Switch 92 further differs from switch 24 in that it lacks control lever 34. Instead, switch 92 includes a rotary knob 94 capable of pivoting, relative to frame 26, about an axis 96 parallel to the vector Z. The rotary button 94 comprises a finger 98 eccentric with respect to the axis 96. Switch 92 further differs from switch 24 in that it includes an intermediate piece 100. Intermediate piece 100 is mechanically connected to an upper end of leaf spring 52 by a mechanical pivot connection. The intermediate part 100 comprises a rectilinear groove 102 receiving the finger 98. The intermediate part 100 is fixed to the frame by means of a sliding connection allowing movement of the intermediate part 100 in a direction perpendicular to the rectilinear groove 102.
- the finger 98, the rectilinear groove 102 and the sliding connection make it possible to transform a rotational movement of the button 94 around the axis 96 into a translational movement of the intermediate piece 100 in the direction of the vector Y.
- Switch 92 further differs from switch 24 in that it includes a rocker 104.
- Rocker 104 has a base 106 integral with upper surface 31.
- Rocker 104 has two beams 108 and 110 mechanically connected to two respective sides of the base. 106.
- Beams 108 and 110 are substantially parallel.
- the beams 108 and 110 are capable of pivoting with respect to the base 106 around a direction parallel to the vector X.
- the beams 108 and 110 are connected to two upper end protrusions 112 capable of being in contact with the vertical surfaces 46 respectively.
- the protrusions 112 are connected by an upper beam 114.
- a lower end of the leaf spring 52 is mechanically connected by a mechanical pivot connection to the upper beam 114.
- the base 106 and the beams 108 and 110 are made of an electrically conductive material , preferably the same material as that used to form the electrically conductive paths 38, 40 and 42.
- the rotary button 94 is in a position such that the intermediate piece 100 is positioned above the electrically conductive path 40. This results in a buckling of the leaf spring 52 in the direction of the electrically conductive path 42 Under these conditions, the lower end of the spring 52 exerts a force tending to move the upper beam 114 towards the electrically conductive path 42. This results in contact between the protrusion 112 of the beam 110 and the electrically conductive path 42. A disturbance, for example a rotation of the knob 94, comes to remove the contact between the protrusion 112 and the path 42, which tends to move the beam 114 again in direction of the path 42. As a result, the pendulum 104 and the rotary knob 94 are in a position of stable equilibrium.
- the rotary knob 94 In the position illustrated in Figure 15, the rotary knob 94 is in an opposite angular position with respect to the position of Figures 13 and 14 and the intermediate piece 100 is located above the race 42. As a result, the leaf spring 52 buckles in the direction of the path 40. This results in a displacement of the beam 114 in the direction of the path 40 and the protrusion 112 of the beam 108 is in stable contact against the path 40. As a result, the rotary button 94 is in a stable equilibrium position and paths 38 and 40 are electrically connected.
- the electrical connection is implemented by means of a contact between the rocker arm 104 and the surfaces 46.
- the electrical connection it is possible to envisage implementing the electrical connection by means of direct contact between the spring 52 and the surfaces 46 as in the first embodiment, or else to provide buttons such as the buttons 70 and 72 of the second and third embodiments.
- the embodiments of the switches according to the invention thus make it possible to improve the reliability of the switching by providing two and only two positions of stable equilibrium and by exerting forces resisting tilting proportional to the curvature and the stiffness of the spring at blade 52.
- the embodiments which have been described make it possible to obtain these results by using a smaller number of parts than in the solutions of the prior art, which further improves the reliability of the mechanism and reduces its cost Manufacturing.
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Switches With Compound Operations (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/278,165 US20240145191A1 (en) | 2021-02-26 | 2022-02-21 | Bistable switch intended to be fitted in an aircraft |
| CN202280016818.5A CN116982130A (zh) | 2021-02-26 | 2022-02-21 | 旨在安装在飞行器中的双稳态开关 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2101923A FR3120272B1 (fr) | 2021-02-26 | 2021-02-26 | Commutateur bistable destiné à être incorporé dans un aéronef |
| FRFR2101923 | 2021-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022180331A1 true WO2022180331A1 (fr) | 2022-09-01 |
Family
ID=76034724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2022/050301 Ceased WO2022180331A1 (fr) | 2021-02-26 | 2022-02-21 | Commutateur bistable destiné à être incorporé dans un aéronef |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240145191A1 (fr) |
| CN (1) | CN116982130A (fr) |
| FR (1) | FR3120272B1 (fr) |
| WO (1) | WO2022180331A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022160203A1 (fr) * | 2021-01-28 | 2022-08-04 | 京东方科技集团股份有限公司 | Plaque arrière d'attaque, panneau d'affichage et dispositif d'affichage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2395698A (en) * | 1943-12-18 | 1946-02-26 | Walter J Mathieu | Electric switch |
| US3067301A (en) * | 1960-02-26 | 1962-12-04 | Yamamoto Mititaka | Tumbler switches |
| US3090846A (en) * | 1960-08-04 | 1963-05-21 | Tateishi Kazuma | Tumbler switch |
| FR2119429A5 (fr) * | 1971-02-13 | 1972-08-04 | Euromation Anstalt | |
| FR2503444A1 (fr) * | 1981-03-31 | 1982-10-08 | Itt | Interrupteur a rupture brusque |
| DE102006031410A1 (de) * | 2005-07-05 | 2007-01-25 | Preh Gmbh | Elektrischer Schalter für ein Kraftfahrzeug |
| US20200365357A1 (en) * | 2019-05-13 | 2020-11-19 | Eaton Intelligent Power Limited | Handle Mechanisms for Circuit Breakers and Related Systems and Methods |
-
2021
- 2021-02-26 FR FR2101923A patent/FR3120272B1/fr active Active
-
2022
- 2022-02-21 US US18/278,165 patent/US20240145191A1/en active Pending
- 2022-02-21 WO PCT/FR2022/050301 patent/WO2022180331A1/fr not_active Ceased
- 2022-02-21 CN CN202280016818.5A patent/CN116982130A/zh active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2395698A (en) * | 1943-12-18 | 1946-02-26 | Walter J Mathieu | Electric switch |
| US3067301A (en) * | 1960-02-26 | 1962-12-04 | Yamamoto Mititaka | Tumbler switches |
| US3090846A (en) * | 1960-08-04 | 1963-05-21 | Tateishi Kazuma | Tumbler switch |
| FR2119429A5 (fr) * | 1971-02-13 | 1972-08-04 | Euromation Anstalt | |
| FR2503444A1 (fr) * | 1981-03-31 | 1982-10-08 | Itt | Interrupteur a rupture brusque |
| DE102006031410A1 (de) * | 2005-07-05 | 2007-01-25 | Preh Gmbh | Elektrischer Schalter für ein Kraftfahrzeug |
| US20200365357A1 (en) * | 2019-05-13 | 2020-11-19 | Eaton Intelligent Power Limited | Handle Mechanisms for Circuit Breakers and Related Systems and Methods |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3120272A1 (fr) | 2022-09-02 |
| FR3120272B1 (fr) | 2023-09-15 |
| US20240145191A1 (en) | 2024-05-02 |
| CN116982130A (zh) | 2023-10-31 |
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