Mechanism for a switch comprising two rocking moving contacts

Abstract

The invention relates to a mechanism for a switch, the mechanism comprising two oscillating moving contacts, each oscillating according to an axis of rotation between two end positions, the mechanism comprising for each moving contact an actuation lever able to rotate about an axis, the actuation lever comprising a respective actuation end for pushing the moving contact, wherein the levers comprise respective cooperating support surfaces, the surfaces being oriented such that their mutual support means that when the first lever rotates according to a positive rotation direction and when the support surfaces enter into contact with each other the first lever causes the rotation of the second lever; and when the second lever rotates according to a negative rotation direction, the first lever constitutes a stop for stopping the rotation of the second lever, such that an unwanted configuration of the oscillating moving contacts is prevented.

Description

Technical Field

[0001] This invention focuses on the mechanism and field of switches designed to have several positions and prevent undesirable configurations of the basic contacts that could lead to short circuits, which could damage the drive motor. Therefore, this invention has a preferred application in the field of reversible drive motors for louvers. Background Technology

[0002] Mechanisms for switches based on two oscillating moving contacts are known, which are also assembled generally adjacent to each other and oscillate about a common axis, such that each of the moving contacts can oscillate between two end positions. These end positions are determined by corresponding fixed contacts connected to the input / output terminals of the switch.

[0003] The moving contact moves by means of two actuating levers, also called rocker arms, one for each moving contact. These levers can also rotate about a common axis arranged parallel to the axis of the moving contact.

[0004] Each lever has an actuating end arranged away from the lever's axis of rotation and mechanically connected to a corresponding moving contact. This mechanical connection is achieved by means of a spring housed in the generally hollow body of the lever, which supports one end inside the lever and the other end against the edge of the moving contact.

[0005] With two pairs of levers / moving contacts, there are four possible configurations when there is no mechanical connection between the levers.

[0006] When these switches are used to actuate reversible motors (e.g., to raise and lower blinds or to extend and retract awnings), only three of the four configurations are of interest. The fourth configuration corresponds to a short-circuit condition that must be avoided. This configuration must be prohibited by the agency.

[0007] To allow three operational configurations while simultaneously prohibiting short-circuit configurations, a mechanism for prohibiting such configurations is known in the prior art, which inserts a mechanism between the levers.

[0008] However, known mechanisms are complex because they involve a large number of parts. Summary of the Invention

[0009] To overcome the shortcomings of the prior art, the present invention proposes a mechanism for a switch, comprising two oscillating movable contacts that oscillate about a rotation axis, such that each of the movable contacts can oscillate between two end positions. The mechanism includes first and second oscillating actuating levers, one for each movable contact, the levers being rotatable about a common axis. Each lever defines an actuating end intended for directly and / or indirectly actuating the movable contact in an actuation region for actuating the movable contact, such that a positive and negative rotation direction of the lever is defined. The first lever includes a support surface, and the second lever includes a support surface intended for support on the support surface of the first lever. These surfaces are oriented such that their mutual support can apply a torque on the levers relative to the common axis, and such that: - When rotated in one direction and when the supporting surfaces come into contact with each other, the first lever causes the second lever to rotate; and - When the second lever rotates in the opposite direction, the first lever acts as a stop to stop the rotation of the second lever.

[0010] Therefore, the present invention includes directly connecting the lever elements to each other. This reduces the complexity and cost of the mechanism and provides greater reliability.

[0011] Furthermore, these features can be formed during the manufacturing of the lever component. The invention can also be implemented using a single lever component design.

[0012] In some embodiments, each lever consists of a rod connecting the actuating end to a common axis.

[0013] In some embodiments, each lever element includes two opposing extensions relative to a common axis, the two extensions being perpendicular to the rod, and the extensions including an end having a pressure application surface on its upper side intended for actuating the lever element.

[0014] In some embodiments, each lever includes two support surfaces intended for support on a support surface of another lever, the two surfaces of each lever being arranged opposite to each other relative to a common axis.

[0015] By making the forces symmetrical, pure torque can be obtained without any force being applied to the axis.

[0016] In some embodiments, each lever includes a protrusion in one of its extensions that extends toward the other lever in the direction of a common axis, the protrusion being provided with one of its support surfaces, and the other extension of each lever is provided with another support surface for the corresponding protrusion.

[0017] This is a symmetrical way of realizing the invention, which allows two levers to be manufactured using a single design.

[0018] In some embodiments, the pressure-applying surfaces have a V-shaped cross section, such that they consist of two inclined planes defining a concave surface.

[0019] In some embodiments, the actuating end of each lever is composed of a U-shaped groove, in which the actuating region of the moving contact is tightly fitted.

[0020] In some embodiments, the mechanism includes a stabilizing spring for stabilizing the lever / moving contact assembly, wherein the lever rod includes a cavity at the actuating end and houses the spring therein.

[0021] In some embodiments, the moving contact has a common axis of rotation.

[0022] In some embodiments, the movable contact comprises two sections: a first pushing or actuating section, which is pushed or actuated by a corresponding lever and is provided with a protrusion at the end of a spring arranged in a cavity at the actuating end of the lever; and a second contact section, which is provided with a tongue including a contact point at its end.

[0023] In some embodiments, the moving contacts are arranged relative to each other in such a way that their actuation sections are adjacent to each other, such that their contact sections are arranged more outward.

[0024] In some embodiments, the mechanism includes a main terminal, a first terminal, and a second terminal, which are composed of a plate having a connecting post at one end. The main terminal has a strip with a V-shaped cross section at the end opposite to the connecting post. The apex of the strip forms a common axis of rotation for the moving contacts, such that a support section for the first moving contact and a support section for the second moving contact are defined in the strip.

[0025] In some embodiments, the first terminal is arranged opposite to the main terminal relative to the axis of rotation of the first movable contact, wherein the second terminal faces the support section for the second movable contact and is arranged next to the main terminal, the first terminal being provided with a contact point, and the second terminal being provided with a contact point, such that only the following configuration is permitted due to the support surface of the lever: - A first configuration in which a first movable contact is not connected to a contact point of a first terminal, and a second movable contact is not connected to a contact point of a second terminal, such that the connecting post of the main terminal is electrically isolated from the connecting terminals of the first and second terminals; - A second configuration, wherein the first movable contact is connected to the contact point of the first terminal, and wherein the second movable contact is not connected to the contact point of the second terminal, such that the connecting post of the main terminal is in electrical contact with the connecting post of the first terminal; and - A third configuration in which the first movable contact is not connected to the contact point of the first terminal, and wherein the second movable contact is connected to the contact point of the second terminal, such that the connecting post of the main terminal is in electrical contact with the connecting post of the second terminal; It is impossible to construct a structure in which the first moving contact is connected to the contact point of the first terminal and the second moving contact is connected to the contact point of the second terminal.

[0026] In some embodiments, the mutually supporting surfaces for the levers are arranged such that when they come into contact with each other, the principal axes of the two levers form an angle of preferably 3° or greater.

[0027] In some embodiments, the mechanism includes three buttons or push buttons: - A first button, which is provided with a pressure application end for applying pressure on the pressure application surface of the first lever, thereby causing the second configuration; - A second button, which is provided with a pressure-applying end, for applying pressure to the pressure-applying surface of the second lever, thereby causing a third configuration; and - The third button has two pressure application ends for simultaneously applying pressure on the application surfaces of the first lever and the second lever, thereby causing the first configuration.

[0028] Finally, the present invention relates to a system for actuating venetian blinds, the system comprising a reversible motor provided with three columns and, according to any variation, a mechanism such that the motor can only be in the following state: Forward movement operation mode; Backward movement operation mode; and No-power mode Short-circuit connections are blocked. Attached Figure Description

[0029] For the purposes of completing the description and providing a better understanding of the invention, a set of accompanying drawings is provided. These drawings form part of the specification and illustrate embodiments of the invention, which should not be construed as limiting the scope of the invention, but are merely examples of how the invention can be practiced. The drawings include the following figures: Figure 1 and Figure 2 The mechanism of the present invention according to a preferred embodiment is shown.

[0030] Figure 3 and Figure 4 Two configurations showing the relative positions of the actuating lever are illustrated.

[0031] Figure 5aThis is a front view of the mechanism in a configuration where the moving contact tilts to the left, thus establishing a connection between terminals B1 and BF. The lever is in the corresponding position.

[0032] Figure 5b It corresponds to Figure 5a The plan view shows that terminal B2 is isolated.

[0033] Figure 5c schematically shown in Figure 5a The connections established in the structure shown.

[0034] Figure 6a , Figure 6b and Figure 6c They are similar to Figure 5a , Figure 5b and Figure 5c However, for a configuration in which the moving contacts are arranged away from the first and second terminals, and therefore there is no conduction.

[0035] Figure 7a , Figure 7b and Figure 7c They are similar to Figure 5a , Figure 5b and Figure 5c However, in the third stable configuration, both moving contacts are tilted to the right, and thus the main terminal and the second terminal are electrically connected.

[0036] Figure 8 and Figure 9 Two elevation views of an embodiment with a button intended for use in moving the mechanism are shown. Figures 6a to 6c The construction shown.

[0037] Figure 10 Shown in a section Figure 8 and Figure 9 The embodiment is arranged in a cross structure for ease of observation, and an extension and leg are provided on the side of the second lever member in this section.

[0038] Figure 11 The perspective view shows the relative positions of the button together with the extension and leg, which together perform guiding and holding functions in the configuration in use. Detailed Implementation

[0039] like Figure 1 As can be seen, the present invention relates to a mechanism for a switch S, the mechanism comprising two oscillating movable contacts P1 and P2, each oscillating about a rotation axis ΓP, such that each of the movable contacts P1 and P2 can oscillate between two end positions.

[0040] The mechanism includes actuating levers L1 and L2, namely the first actuating lever L1 and the second actuating lever L2. For each moving contact P1 and P2, levers L1 and L2 can rotate about a common axis ΓL.

[0041] Each lever element L1, L2 (also known as a rocker arm) has an actuating end L1D, L2D, which is designed to directly and / or indirectly actuate the moving contacts P1, P2 in the actuation regions P11, P12 for actuating the moving contacts P1, P2.

[0042] Direct actuation is possible because the ends themselves can directly actuate the moving contact. However, in general, such actuation will occur due to the actuation of the spring M, which passes through the cavity of the lever inserted at the actuating ends L1D and L2D of the lever.

[0043] The positive and negative rotation directions of levers L1 and L2 can also be defined.

[0044] According to the present invention, such as Figure 3 and Figure 4 As can be seen, the first lever L1 includes a support surface LS1, and the second lever L2 includes a support surface LS2, which is intended to be used for support on the support surface LS1 of the first lever L1. These surfaces LS1 and LS2 are oriented such that their mutual support can apply a torque on the levers L1 and L2 relative to the common axis ΓL, and such that: - When rotating in the positive rotation direction and when the support surfaces LS1 and LS2 come into contact with each other, the first lever L1 causes the second lever L2 to rotate; and - When the second lever L2 rotates in the negative rotation direction, the first lever L1 acts as a stop to stop the rotation of the second lever L2.

[0045] In other words, within the operating interval of the lever member, which is divided by the angle of the limiting contact towards the working interval, lever member L1 can push lever member L2 in one direction, and lever member L2 can push L1 in the opposite direction. However, lever member L1 cannot "pull" the lever member in the opposite direction. In other words, lever member L1 constitutes a stop for lever member L2, and from a structural point of view, there is a prohibited configuration in which lever member L2 is arranged on the right and lever member L1 is arranged on the left (refer to the portion arranged below the rotation axis ΓL of the lever member when viewing the lever member from a front view in which the first lever member is arranged in front of the second lever member).

[0046] Each lever L1, L2 consists of rods LH1, LH2, which connect actuating ends L1D, L2D to a common axis ΓL, and includes two opposing extensions E11, E12, E21, E22 perpendicular to the rods LH1, LH2 and related to the common axis ΓL. These extensions E11, E12, E21, E22 include ends on their upper sides that are provided with pressure application surfaces L11, L12, L21, L22 intended for actuating the levers L1, L2.

[0047] The mutual pushing is achieved by means of two support surfaces LS1, LS2 in each lever element L1, L2. The two surfaces LS1, LS2 of each lever element L1, L2 are arranged opposite each other with respect to the common axis ΓL.

[0048] One of the extensions E11 and E22 of each lever L1 and L2 includes a protrusion S11 or S21 extending in the direction of the common axis ΓL toward the other lever L1 or L2. The protrusion S11 or S21 is provided with one of the support surfaces LS1 or LS2. The other extension E12 or E21 of each lever L1 or L2 is provided with a support surface for the corresponding protrusion S11 or S21.

[0049] The pressure-applying surfaces L11, L12, L21, and L22 have V-shaped cross sections, such that they consist of two inclined planes defining concave surfaces. The concave surfaces created by these V-shaped cross sections are designed to receive the actuation of an undepicted button, which can be directly actuated by the user and is positioned above the depicted mechanism.

[0050] According to a preferred embodiment, the actuating ends L1D and L2D of each lever L1 and L2 are composed of U-shaped grooves, which are used to push the pushing areas P11 and P12 of the moving contacts P1 and P2 to fit tightly in the grooves.

[0051] In a preferred embodiment, the actuating ends L1D and L2D of the levers L1 and L2 are connected to the pushing area or actuating section TA of the moving contacts P1 and P2 by means of the insertion of the stabilizing spring M.

[0052] The stabilizing spring M for stabilizing lever / moving contact assemblies L1 / P1, L2P2 is housed in a cavity inside rods LH1, LH2, which are hollow at least at their actuating ends L1D, L2D.

[0053] Furthermore, an embodiment in which the moving contacts P1 and P2 have a common axis of rotation ΓP is preferred. An embodiment in which the moving contacts P1 and P2 consist of two segments TA and TC is also preferred. The first actuating segment TA or pushing area is actuated or pushed by corresponding levers L1 and L2, and is provided with protrusions F1A and F2A for mounting the ends of the springs M arranged in the levers L1 and L2. The second contact segment TC is provided with a tongue, the tongue including contact points F1 and F2 at its end.

[0054] Therefore, the moving contacts P1 and P2 are arranged relative to each other, with their actuation sections TA adjacent to each other, such that their contact sections TC are arranged more outward.

[0055] In addition to the movable mechanism of the switch, the present invention also includes a main terminal F, a first terminal 1 and a second terminal 2, which are composed of a plate with connecting posts BF, B1 and B2 at one end. The main terminal F has a strip with a V-shaped cross section at the end opposite to the connecting post BF. The apex of the strip forms the common rotation axis ΓP of the moving contacts P1 and P2, such that a support section for the first moving contact P1 and a support section for the second moving contact P2 are defined in the strip.

[0056] like Figures 5a to 7c As shown, the first terminal 1 is arranged opposite to the main terminal F with respect to the common rotation axis ΓP of the moving contacts P1 and P2, wherein the second terminal 2 faces the support section for the second moving contact P2 and is arranged next to the main terminal F. The first terminal 1 is provided with contact point C1, and the second terminal 2 is provided with contact point C2, such that due to the support surfaces LS1 and LS2, only the following configuration is allowed: - Figures 6a to 6c The first configuration shown in the diagram, wherein the first movable contact P1 is not connected to the contact point C1 of the first terminal 1, and wherein the second movable contact P2 is not connected to the contact point C2 of the second terminal 2, such that the connecting post BF of the main terminal F is electrically isolated from the connecting terminal B1 of the first terminal 1 and the connecting terminal B2 of the second terminal 2.

[0057] - Figures 5a to 5c The second configuration shown indicates that the first moving contact P1 is connected to the contact point C1 of the first terminal 1, and the second moving contact P2 is not connected to the contact point C2 of the second terminal 2, such that the connecting post BF of the main terminal F is in electrical contact with the connecting post B1 of the first terminal 1; and - Figures 7a to 7c The third configuration shown is such that the first moving contact P1 is not connected to the contact point C1 of the first terminal 1, and the second moving contact P2 is connected to the contact point C2 of the second terminal 2, such that the connecting post BF of the main terminal F is in electrical contact with the connecting post B2 of the second terminal 2. It is impossible to construct a structure in which the first moving contact P1 is connected to the contact point C1 of the first terminal 1 and the second moving contact P2 is connected to the contact point C2 of the second terminal 2.

[0058] The described mechanism is designed for operation using three buttons or push buttons: - A first button, which is provided with a pressure application end for applying pressure on the pressure application surface L11 of the first lever L1, thereby resulting in the second configuration; - A second button, which is provided with a pressure application end, for applying pressure on the pressure application surface L22 of the second lever L2, thereby resulting in a third configuration; and - The third button has two pressure application ends for simultaneously applying pressure on the application surfaces L11 of the first lever L1 and the second lever L2, thereby resulting in the first configuration.

[0059] Therefore, the present invention has an advantageous application in systems for actuating louvers, the system comprising a reversible motor with three columns and a switching mechanism according to the present invention, such that the motor can only be in a forward movement operation mode. Backward movement operation mode; and No-power mode Short-circuit connections are blocked.

[0060] So far, the lever components have been described in detail up to the horizontal axis. However, it is also envisioned that, as... Figure 8 and Figure 9 As shown, the mechanism includes a button BO1, which includes a body BB and a moving axis ΓB perpendicular to the common axis ΓL of the levers L1 and L2.

[0061] like Figures 8 to 11 As shown, the button BO1 includes a body BB and has a movement axis ΓB perpendicular to the common axis ΓL.

[0062] The button BO1 includes a first leg B11 extending on one side in the direction of the moving axis ΓB, and is arranged to press on the first pressure application surface L12 of the first swing lever L1.

[0063] Conversely, the first swing lever L1 includes an upper extension LU1 opposite its rod LH1 to the common axis ΓL. This upper extension LU1 includes, in a very advantageous manner, an inclined surface LB1 relative to the rod LH1.

[0064] Furthermore, the main body BB includes a ridge BP oriented toward the inclined surface LB1 and preferably centered on the axis of movement ΓB. The surface LB1 is oriented such that the force G1 exerted by the ridge BP on the inclined surface LB1 (in...) Figure 9 (As shown in the figure) A torque MBP1 is applied on the lever L1 relative to the common axis ΓL, and the torque MBP1 has the same direction as the torque MB11 applied by the first leg B11 on the pressure application surface L12.

[0065] Therefore, when the button is pressed at one of its ends (which causes it to rotate, and thus causes insufficient movement of the end arranged on the instantaneous axis of rotation of the button), the center of the button does move very precisely, and said movement is used by the bulge BP to apply torque on the lever.

[0066] Figures 8 to 10 The first lever element L1 in the second plane is depicted (with) Figures 1 to 7c Conversely), while the second lever L2 is in the first plane. Therefore, in Figure 8 and Figure 9 The button portion can be seen, which is basically located above the first lever element L1. However, Figure 10 The section depicts a button located in front of the cross-section of this section, specifically a button located on the second lever L2.

[0067] The button includes a second leg B12 that protrudes from the button body in the direction of the movement axis ΓB and is arranged to press against a first pressure application surface L22 of a second swing lever L2. The second swing lever L2 includes an upper extension LU2 opposite to its rod LH2 relative to the common axis ΓL. The upper extension LU2 includes an inclined surface LB2 relative to the rod LH2, which is oriented such that the force G2 applied to the inclined surface LB2 by the bulge BP (in) Figure 8 As shown in the figure, a torque MBP2 is applied to the swing lever L2 relative to the common axis ΓL. This torque MBP2 has the same direction as the torque MB12 applied to the pressure application surface L21 by the second leg B12, such that when the button BO1 is pressed, the second lever L2 rotates in the opposite direction to the rotation of the first swing lever L1.

[0068] Similarly, a button spring MB is conceived that presses against button BO1, causing it to move away from the common axis ΓL. The button spring MB is supported on the inner surface of button BO1 at its upper end and on a support fixed relative to the body of the switch at its lower end.

[0069] As a retaining accessory for buttons, and as Figure 11As shown, legs B11 and B12 are envisioned to include retaining protrusions (only when...) Figure 10 and Figure 11 The B12S (referring to B12) is positioned on the outer side of the legs B11 and B12, facing the wall of the switch S in which the button BO1 is housed. The retaining protrusion B12S functions as a means of stopping the button BO1, stabilizing it when pressed by the button spring MB towards a position further away from the levers L1 and L2. In the wall containing the switch, a recess (not shown) is envisioned on the surface facing the extension, which complements the retaining protrusion B12S, thus serving as a stop. Therefore, in standby mode, the button BO1 is balanced by the button spring MB at its lower portion and held in the opposite direction by the retaining protrusion B12S supported in the recess of the wall.

[0070] For example, in Figure 11 As can be seen, button BO1 includes a guide and retaining extension RG1 arranged relative to the first leg B11 on the other side of the plane defined by the common axis ΓL and the movement axis ΓB. The guide and retaining extension extends from the body of the button in the direction of the movement axis ΓB and is provided with a retaining protrusion R1S.

[0071] It is also conceivable that a second guide and retaining extension R2 is arranged on the other side of the plane defined by the common axis ΓL and the moving axis ΓB relative to the second leg B12, the second guide and retaining extension extending from the body of the button in the direction of the moving axis ΓB, and having a retaining protrusion R2S.

[0072] Button BO1 is designed with a cavity BU oriented toward the swing levers L1 and L2, wherein the upper extensions LU1 and LU2 of the levers are accommodated in the cavity BU.

[0073] The term “including” and its derivatives (such as “contains”) shall never be understood in an exclusive sense in this document; that is, these terms shall never be interpreted as excluding the possibility that the content described and defined may include other elements.

[0074] Obviously, the present invention should not be limited to the specific embodiments described herein, but also covers any variations that may be conceived by any person skilled in the art within the general scope of the invention as defined in the claims.

Claims

1. A mechanism for a switch (S) comprising two oscillating movable contacts (P1, P2), each oscillating about a rotation axis (ΓP), such that each of the movable contacts (P1, P2) is oscillating between two end positions, the mechanism comprising actuating levers (L1, L2), namely a first actuating lever (L1) and a second actuating lever (L2), each movable contact (P1, P2) having one actuating lever, the first actuating lever (L1) and the second actuating lever (L2) being rotatable about a common axis (ΓL), wherein... Each actuating lever (L1, L2) defines an actuating end (L1D, L2D) designed to directly and / or indirectly actuate the movable contacts (P1, P2) in actuation regions (P11, P12) for actuating the movable contacts (P1, P2), such that the positive and negative rotational directions of the first actuating lever (L1) and the second actuating lever (L2) are defined. The first actuating lever (L1) includes a first support surface (LS1), and the second actuating lever (L2) includes a second support surface (LS2) designed to support the first support surface (LS1) of the first actuating lever (L1). The first support surface (LS1) and the second support surface (LS2) are oriented such that their mutual support can apply a torque relative to the common axis (ΓL) on the first actuating lever (L1) and the second actuating lever (L2), and such that: - When rotating in the positive rotation direction (+) and when the first support surface (LS1) and the second support surface (LS2) come into contact with each other, the first actuating lever (L1) causes the second actuating lever (L2) to rotate; and - When the second actuating lever (L2) rotates in the negative rotation direction (-), the first actuating lever (L1) constitutes a stop for stopping the rotation of the second actuating lever (L2).

2. The mechanism for switching according to claim 1, wherein, Each actuating lever (L1, L2) consists of a rod (LH1, LH2) that connects the actuating end (L1D, L2D) to the common axis (ΓL).

3. The mechanism for switching according to claim 2, wherein, Each actuating lever (L1, L2) includes two opposing extensions (E11, E12, E21, E22) perpendicular to the rod (LH1, LH2) and relative to the common axis (ΓL). These extensions (E11, E12, E21, E22) include ends on their upper sides that are provided with pressure application surfaces (L11, L12, L21, L22) intended for actuating the first actuating lever (L1) and the second actuating lever (L2).

4. The mechanism for switching according to claim 3, wherein, Each actuating lever (L1, L2) includes two support surfaces (LS1, LS2) intended for support on the support surface of another actuating lever (L1, L2), wherein the two support surfaces (LS1, LS2) of each of the first actuating lever (L1) and the second actuating lever (L2) are arranged opposite to each other relative to the common axis (ΓL).

5. The mechanism for switching according to claim 3 or 4, wherein, One of the extensions (E11, E21) of each actuating lever (L1, L2) includes a protrusion (S11, S21) extending in the direction of the common axis (ΓL) toward the other actuating lever (L1, L2), the protrusion (S11, S21) being provided with one of the first support surface (LS1) and the second support surface (LS2), and the other extension (E12, E22) of each actuating lever (L1, L2) being provided with a support surface for the corresponding protrusion (S11, S21).

6. The mechanism for switching according to claim 3, wherein, The pressure-applying surfaces (L11, L12, L21, L22) have a V-shaped cross section, such that they consist of two inclined planes defining a concave surface.

7. The mechanism for a switch according to claim 2, comprising a stabilizing spring (M) for stabilizing the assembly of the actuating lever and the moving contact, wherein, The actuating ends (LD1, LD2) of the rods (LH1, LH2) are hollow and house the stabilizing spring (M).

8. The mechanism for switching according to claim 3, wherein, The moving contacts (P1, P2) have a common axis of rotation (ΓP).

9. The mechanism for a switch according to claim 8, wherein, The movable contacts (P1, P2) consist of two sections (TA, TC): a first actuation section (TA), which is actuated by the corresponding actuation lever (L1, L2) and is provided with protrusions (F1A, F2A) for mounting the ends of the stabilizing springs (M) arranged in the corresponding actuation levers (L1, L2); and a second contact section (TC), which is provided with a tongue, the tongue including contact points (F1, F2) at its end.

10. The mechanism for a switch according to claim 9, wherein, The moving contacts (P1, P2) are arranged relative to each other such that their actuation sections (TA) are adjacent, and their contact sections (TC) are arranged more outward.

11. The mechanism for a switch according to claim 8, comprising a main terminal (F), a first terminal (1), and a second terminal (2), the main terminal (F), the first terminal (1), and the second terminal (2) being composed of a plate having a connecting post (BF, B1, B2) at one end, the main terminal (F) having a strip with a V-shaped cross section at the end opposite to the connecting post (BF), the apex of the strip forming the common axis of rotation (ΓP) of the movable contacts (P1, P2), such that the strip defines a support section for a first movable contact (P1) and a support section for a second movable contact (P2) of the movable contacts (P1, P2).

12. The mechanism for a switch according to claim 11, wherein, The first terminal (1) is arranged opposite to the main terminal (F) on the common axis of rotation (ΓP) of the moving contacts (P1, P2), wherein the second terminal (2) faces the support section for the second moving contact (P2) and is arranged next to the main terminal (F), the first terminal (1) is provided with a contact point (C1), and the second terminal (2) is provided with a contact point (C2), such that only the following configuration is allowed due to the first support surface (LS1) and the second support surface (LS2): - A first configuration in which the first movable contact (P1) is not connected to the contact point (C1) of the first terminal (1), and wherein the second movable contact (P2) is not connected to the contact point (C2) of the second terminal (2), such that the connecting post (BF) of the main terminal (F) is electrically isolated from the connecting post (B1) of the first terminal (1) and the connecting post (B2) of the second terminal (2); - A second configuration in which the first movable contact (P1) is connected to the contact point (C1) of the first terminal (1), and wherein the second movable contact (P2) is not connected to the contact point (C2) of the second terminal (2), such that the connecting post (BF) of the main terminal (F) is in electrical contact with the connecting post (B1) of the first terminal (1); and - A third configuration in which the first movable contact (P1) is not connected to the contact point (C1) of the first terminal (1), and wherein the second movable contact (P2) is connected to the contact point (C2) of the second terminal (2), such that the connecting post (BF) of the main terminal (F) is in electrical contact with the connecting post (B2) of the second terminal (2); It is impossible to construct a structure in which the first moving contact (P1) is connected to the contact point (C1) of the first terminal (1) and the second moving contact (P2) is connected to the contact point (C2) of the second terminal (2).

13. The mechanism for switching according to claim 12, comprising: - A first button, which is provided with a pressure application end for applying pressure on the pressure application surface (L11) of the first actuating lever (L1), thereby causing the second configuration; - A second button, which is provided with a pressure application end for applying pressure on the pressure application surface (L22) of the second actuating lever (L2), thereby causing the third configuration; and - A third button, which has two pressure application ends, is used to simultaneously apply pressure on the pressure application surfaces of the first actuating lever (L1) and the second actuating lever (L2), thereby causing the first configuration.

14. A system for actuating venetian blinds, comprising a reversible motor with three columns and a switching mechanism according to claim 12 or 13, such that the motor can only be in the following state: Forward movement operation mode; Backward movement operation mode; and No-power mode in, The short circuit connection was blocked.

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