Button and electrical system comprising same

Abstract

The button (100) includes a plunger assembly (10) including a translation-to-rotation transition member (5), a latch member (6), and a latch spring element (56). The latch spring element connects the latch member to the translation-to-rotation conversion member such that rotation of the translation-to-rotation conversion member caused by a user pressing the button drives the latch member to a position in which the latch member abuts a release portion in an inner surface of a housing (30) of the button. This arrangement of the plunger assembly avoids multiple repeated locking operations on the latch member and / or the release portion. Therefore, the service life of the button is prolonged.

Description

Technical Field

[0001] The invention relates to a push button and an electrical system comprising such a push button. Background Art

[0002] Pushbuttons are used to hold in a spring-loaded pressed position actuator. An important application is to provide stop keys for electrical systems, especially for safety requirements.

[0003] Two types of locking mechanisms are used to hold the button in the pressed position.

[0004] The first type is implemented as a ball or finger pushed radially outwards into a recess by a spring, as disclosed in EP1261978B1, for example. However, the edge of the recess becomes worn after many locking and unlocking operations, which leads to a decrease in the reliability of the button over its life. In addition, one or two radial forces may be involved in this type of locking mechanism, which may lead to a misalignment of at least some of the constituent elements of the button relative to other elements. Jamming of the button then occurs, again leading to a decrease in the reliability of its operation.

[0005] The second type of locking mechanism is realized by the rotation of a column provided with a protruding edge section, so that the edge section is held by a fixed release element, preventing a reverse translation driven by a return spring. However, repeated impacts of the edge section into the release element can change the shape of these parts, causing the button to no longer operate correctly.

[0006] Based on this situation, the present invention aims to provide a new type of button, which alleviates or solves the above problems.

[0007] In particular, it is an object of the present invention to provide a push button which exhibits reliable operation over an increased lifespan.

[0008] Another object of the present invention is to provide a button that can be unlocked simply by turning it or by a turning or pulling action performed by the user.

[0009] Another additional object of the present invention is to reduce the possibility of obstruction that may interfere with the operation of the button. Summary of the invention

[0010] In order to meet at least one of these and other purposes, a first aspect of the present invention provides a button that is suitable for being pressed by a user in parallel to a pressing direction and for being maintained in a locked pressed position until the user performs an unlocking action. In the button of the present invention, at least a portion of a plunger subassembly is driven to rotate by the user pressing the push head of the button, and then the rotating portion of the plunger subassembly abuts against a release portion present in the inner surface of the housing of the button, thereby producing a locking of the pressed position.

[0011] According to the present invention, the plunger subassembly comprises:

[0012] - A translation-to-rotation conversion component adapted to be rotated by a user pressing the push head;

[0013] - a latch member having an edge arranged for abutting a release portion in an inner surface of the housing to produce a locking in a depressed position; and

[0014] - A latch spring element that is separate from the translation-to-rotation conversion component and connects the latch component to the translation-to-rotation conversion component so that rotation of the translation-to-rotation conversion component drives the latch component through the latch spring element to a position causing the latch component to abut against a release portion in the inner surface of the housing.

[0015] Due to the latch spring element acting between the translation-to-rotation conversion member and the latch member, the impact of the latch member into the release part is reduced, so that the button remains reliable during the life of the lift. The appropriate selection of the latch spring element produces a calibrated impact and abutment force of the latch member on the release part, thereby avoiding damage to the latch member and / or the release part, which damage may otherwise cause repeated locking operations.

[0016] In a possible embodiment of the invention, the button may also include a return spring intermediate piece between the push head of the button and the housing, the return spring being arranged so that a user pressing the push head causes compression of the return spring. The compressed return spring may then complete the driving action of the latch spring element to produce abutment of the latch part against the release part in the inner surface of the housing. In particular, the return spring may drive the button from a stop position, in which the push head has been pressed to a maximum depth into a locking position, in which the latch part actually abuts the release part.

[0017] The user presses the push head to cause the plunger subassembly to translate along the pressing direction. Then, the plunger subassembly may include the following components:

[0018] - a central plunger arranged to receive a pressing force due to a user pressing the pusher head and to drive the plunger subassembly into translational movement;

[0019] - a translation-to-rotation conversion member disposed about the central plunger and rotatable relative to the central plunger;

[0020] - a latch member, also arranged around the central plunger and rotatable relative to the central plunger; and

[0021] -Latch spring element.

[0022] By such an arrangement, when the user presses the push head, the central plunger, the translation-to-rotation conversion component, the latch component and the latch spring element all perform the same translation movement component parallel to the pressing direction. Preferably, the latch spring element can be a torsion spring arranged between the translation-to-rotation conversion component and the latch component, the torsion spring having turns arranged around the central plunger.

[0023] In a first embodiment of the present invention that realizes the combination of the pull-back spring and the plunger subassembly as above, the edge of the latch component is perpendicular to the pressing direction and extends between the re-entrant corner of the latch component and the escape end of the edge. Through such a configuration, a locked pressing position is generated by the edge of the latch component at the re-entrant corner abutting against the vertex of the release portion in the inner surface of the housing. From this locked pressing position, the reverse rotation of the center plunger can cause the latch component to rotate and slide on the release portion until the escape end reaches the vertex of the release portion, thereby allowing the pull-back spring to pull the center plunger in a pull-back direction opposite to the pressing direction. In such a first embodiment, the unlocking of the button can only be performed by the reverse rotation of the push head applied by the user. The push head can be arranged to contact the center plunger so that the reverse rotation applied to the push head by the user is transmitted to the center plunger.

[0024] For these first embodiments of the invention, the center plunger can be provided with a reverse inclined edge, arranged to contact another release portion present in the inner surface of the housing. The return spring then pulls the center plunger in the return direction to rotate the center plunger. This is achieved by the reverse inclined edge sliding on the so-called other release portion, resisting the return force generated by the latch spring element. Preferably, the release portion and the so-called other release portion can belong to the same release element located in the inner surface of the housing. In this case, the reverse inclined edge of the center plunger can be arranged so that when the return spring pulls the plunger subassembly in the return direction, the forward portion of the latch component and the center plunger supporting the reverse inclined edge slides simultaneously along the release element on the opposite edge of the release element. During such movement, the latch spring element causes the latch component and the forward portion of the center plunger to pressure-sandwich the release element.

[0025] In a second embodiment of the present invention, a pull-back spring and the above-mentioned plunger subassembly combination are also implemented, and the edge of the latch component is inclined relative to the pressing direction, but again extends between the recessed corner of the latch component and the escape end of the edge. With such an alternative configuration, a locked pressing position is again produced by the edge of the latch component at the recessed corner abutting against the vertex of the release portion in the inner surface of the housing. From this locked pressing position, the translation shift of the center plunger in the pull-back direction opposite to the pressing direction can cause the latch component to rotate and slide on the release portion until the escape end reaches the vertex of the release portion. This allows the pull-back spring to further pull the plunger subassembly in the pull-back direction. In such a second embodiment, the unlocking of the button can be performed by a reverse rotation or pulling of the push head applied by the user. The push head can be arranged to contact the center plunger so that the pulling movement applied to the push head by the user is transmitted to the center plunger so as to translate the latter in the pull-back direction.

[0026] Typically, for the present invention, the button may further include a trigger spring, which is located between the push head and the plunger subassembly and is arranged to transmit at least a portion of the translational motion applied to the push head by the user in the pressing direction to the plunger subassembly. Such a trigger spring prevents the plunger subassembly from hitting the stopper portion of the housing with excessive strength under the pressing action of the user. In this way, repeated multiple impacts may no longer damage the stopper portion of the plunger subassembly and / or the housing.

[0027] Likewise, for the present invention, the push head, the plunger subassembly and the inner surface of the housing can be designed to remain identical by rotating 120° around an axis parallel to the pressing direction. This ensures that all elements of the movable button remain parallel when moving, thereby avoiding any blocking of the button. In other words, this design that remains identical by rotating 120° provides isostatic balance for the constituent elements of the button, thereby avoiding misalignment of some of them relative to other elements.

[0028] A second aspect of the invention proposes an electrical system comprising a spring-loaded actuator designed to be operated by a user pressing on the actuator, and further comprising a button according to the first inventive aspect. The button is arranged above the actuator to provide a locking function to the pressed state of the actuator. The actuator and the button can together form a stop key of the electrical system.

[0029] These and other features of the invention will now be described with reference to the accompanying drawings, which relate to preferred but non-limiting embodiments of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1a is an exploded perspective view of components of a button according to the present invention.

[0031] Figure 1b Is set in Figure 1a An enlarged view of the release element in one of the components of the button.

[0032] Figure 2a is in the closed position Figure 1a perspective view of the button.

[0033] Figure 2b yes Figure 1a An enlarged view of a portion of the button, also involving Figure 2a closed position.

[0034] Figure 3a and 3b Corresponding to Figure 2a and 2b , but for the button's activated position.

[0035] Figure 4a and 4b Also corresponds to Figure 2a and 2b , but for the trigger position of the button.

[0036] Figure 5a and 5b Also corresponds to Figure 2a and 2b , but for the button's detent position.

[0037] Figure 6a and 6b Also corresponds to Figure 2a and 2b , but for the locked position of the button.

[0038] Figure 7a and 7b Also corresponds to Figure 2a and 2b , but for the rotated-unlocked position of the button.

[0039] Figure 8a and 8b Also corresponds to Figure 2a and 2b , but for the rotated-unlocked position of the button.

[0040] Figure 9a and 9b Corresponding to Figure 6b and 7b , but for alternative embodiments of the invention it can be unlocked only by reverse rotation.

[0041] Fig.10 An electrical system according to the invention is shown.

[0042] For the sake of clarity, the dimensions of the elements shown in these figures do not correspond to actual dimensions or dimension ratios. Moreover, the same reference numerals indicated in different figures in these figures denote the same elements having the same functions. DETAILED DESCRIPTION

[0043] In these drawings, the reference numerals listed below denote constituent elements of the button 100 described below:

[0044] 1 Push head

[0045] 2 Install the housing

[0046] 3 Inserts

[0047] 4 Plunger, also called center plunger in the general part of the instructions

[0048] 5 Column member, also referred to as the translation to rotation conversion member in the general part of the specification

[0049] 6 Locking part

[0050] 7 Ring, also referred to in the general part of the instructions as the forward part of the center plunger

[0051] 12 Pull back spring

[0052] 14 Trigger spring

[0053] 56 Latch spring, also referred to as latch spring element in the general part of the description, for example in the form of a multi-turn torsion spring

[0054] L is the longitudinal direction, corresponding to the direction in which the user presses the activation button

[0055] The inserts 3 are fixed in the mounting housing 2 , and these inserts 3 and the mounting housing 2 together form a housing 30 of the pushbutton 100 .

[0056] The return spring 12 is designed to move the pusher head 1 and the housing 30 parallel to the longitudinal direction L away from each other.

[0057] The trigger spring 14 is designed to transmit a push-shift from the push head 1 to the plunger 4 .

[0058] The column 5, the latching part 6 and the latching spring 56 are arranged around the plunger 4, respectively. These elements together with the plunger 4 and the ring 7 constitute the plunger subassembly 10. In this subassembly, the ring 7 is fixed to the plunger 4, at its front end opposite to the push head 1. This division between the plunger 4 and the ring 7 is optional, but can be advantageous for the assembly problem of the entire button 100. The column 5 and the latching part 6 are each rotatable relative to the plunger 4, but without a possible translational movement component relative to the plunger 4. The latching spring 56 connects the column 5 to the latching element 6 at an angle. It is mounted in the column 5.

[0059] Other reference numerals shown in the drawings have the following meanings:

[0060] 11 The protruding finger-like portion of the push head 1 is intended to cooperate with the inclined edge of the column 5

[0061] 21 Install the outer peripheral stop ring of the housing 2

[0062] The release element 32 in the inner surface of the insert 3 has, in the embodiment described here, an L-shape, wherein the long section of the L-shaped letter is parallel to the longitudinal direction L and the small transverse section of the L-shaped letter is directed toward the ring 7.

[0063] 33 External apex of release element 32

[0064] 34 inner apex of release element 32

[0065] 41 radially protruding edge section of the plunger 4

[0066] 51 An internal recess of the column 5 for anchoring the first end of the latch spring 56

[0067] 52 radially protruding edge section of column 5

[0068] The inclined edge of the column 53 is in contact with the finger-shaped portion 11 of the push head 1.

[0069] 61 An internal recess of the latch member 6 for anchoring the second end of the latch spring 56

[0070] 62 A longitudinal projection of the latch member 6 extending parallel to the longitudinal direction L

[0071] 63 The edge of the latch component 6 is to be in contact with the release element 32 of the insert 3

[0072] 64 Stop end of edge 63, concave angle form

[0073] 65 The escape end of edge 63

[0074] 72 The longitudinal projection of the ring 7, which extends parallel to the longitudinal direction L

[0075] 73 The reverse inclined edge of the longitudinal projection 72

[0076] The partial element 32 implemented in the embodiment comprises a so-called release portion and a so-called further release portion as introduced in the general part of the description. The so-called release portion is a part of the release element 32 cooperating with the latch part 6, and the so-called further release portion is another part of the release element 32 cooperating with the ring 7.

[0077] Preferably, at least the forward portion of the push head 1 cooperating with the plunger subassembly 10, the portion of the inner surface of the insert 3 containing the release element 32, the post 5, the latch member 6 and the ring 7 remain identical when rotated 120° about the central axis of the button 100 parallel to the longitudinal direction L. Therefore, the release element 32, the portions 62 and 72, the finger portion 11, the inclined edge 53 and the edge sections 41 and 52 are all triplicates, although the operational description hereinafter is provided for a single set of these component parts.

[0078] The operation of the button 100 will now be described.

[0079] Figure 2a and 2b The starting position is shown, which is referred to as the closed position of the push button 100. In this position, the push head 1 is held farthest from the housing 30 by the retraction spring 12, and the plunger subassembly 10 is pulled back to a maximum displacement length opposite to the longitudinal direction L via a dedicated finger-shaped portion arranged in the forward part of the push head 1. To this end, the finger-shaped portion can releasably hook an edge section of the plunger 4. This function can also be produced by the finger-shaped portion 11 of the push head 1. Figure 2b It is shown that a small transverse section of the release element 32 is sandwiched between the parts 62 and 72 due to the latch spring 56 , and the top of the L-letter shape of the release element 32 is close to the edge section 52 of the pillar 5 .

[0080] The user starts to press the push head 1 in the longitudinal direction L. The translational displacement in the longitudinal direction L is transmitted to the plunger 4 via the trigger spring 14. The finger portion 11 of the push head 1 comes into contact with the inclined edge 53 of the column 5 and causes it to rotate against the torque generated by the latch spring 56. Energy is thus accumulated in the latch spring 56. This corresponds to Figure 3a and 3b The actuated position of the button 100 is shown. In this position, the edge section 52 of the column 5 has been rotated so that it is no longer aligned with the top end of the L-letter shape of the release element 32, thus allowing the plunger subassembly 10 to start translating in the longitudinal direction L. The rotation of the column 5 Figure 3b Indicated by tangential arrow A1.

[0081] Further pressing of the push head 1 results in Figure 4a and4b Due to the pressure of the trigger spring 14, the plunger subassembly 10 has been translated in the longitudinal direction L until the edge section 52 of the column 5 abuts against the small transverse bottom section of the L letter shape of the release element 32. Such translation of the plunger subassembly 10 is caused by Figure 4b At the same time, the torque generated by the latch spring 56 causes the latch member 6 to rotate toward the portion 72 of the ring 7 according to the top edge 63 of the portion 62 as shown by the arrow A3.

[0082] The push head 1 stops moving forward when it abuts against the stop ring 21 of the mounting housing 2. Figure 5a and 5b Detent position shown.

[0083] The user no longer presses the push head 1. The return spring 12, acting through the finger portion 11 of the push head 1 hooking the edge section 41 of the plunger 4, moves the plunger subassembly 10 backward until the stop end 64 of the edge 63 of the latch member 6 abuts the outer apex 33 of the release element 32. Such a backward displacement of the plunger subassembly 10 can be any, in particular from about 0.5 mm to 2 mm, such as Figure 6b As shown by the vertical arrow A4. Figure 6a and 6b The locking position of the push button 100 is shown. The locking is produced by the outer vertex 33 of the release element 32 abutting against the edge 63 of the latch part 6 at the stop end 64 of this edge. The activation of the push button 100 from the closed position to the switched-on state is completed.

[0084] From this locked position, the user can bring the button 100 back to the closed position by reverse rotation of the push head 1. The appropriate design of the push head 1 and the forward part of the plunger 4 transmits this reverse rotation from the push head 1 to the plunger 4 and the ring 7, and the reverse rotation direction causes the portion 72 of the ring 7 to push the portion 62 of the latch member 6 to rotate against the torque generated by the latch spring 56, because the column 5 is held blocked by the edge section 52 abutting the inner apex 34 of the L-letter shape of the release element 32. This results in Figure 7a and 7b The reverse rotation of the latch member 6 is caused by Figure 7b As indicated by the tangent arrow A5 in the figure. Once the escape end 65 of the latch member edge 63 is reversely rotated beyond the outer vertex 33 of the release element 32, the return spring 12 causes the plunger subassembly 10 to move backward again, again by hooking the finger-like portion 11 of the push head 1 of the edge section 41 of the plunger 4. During the backward movement, the sliding contact between the reverse inclined edge 73 of the ring 7 and the release element 32 causes the ring 7 to rotate together with the plunger 4 in the direction opposite to the direction just applied to the push head 1 by the user, as shown by the oblique arrow A6. The button 1 thus moves back to Figure 2a and 2b The closed position, such as Figure 7b As shown by the longitudinal arrow A7 in FIG.

[0085] Again from Figure 6a and 6b The locked position is provided if the edge 63 of the latch member 6 is inclined relative to the longitudinal direction L, for example in each plane tangential to the edge 63 and having an angle value α of from about 15° (degrees) to about 45° when measured from a tangential direction perpendicular to the longitudinal direction L (see Figure 8b ), the user can pull the push head 1 with sufficient force to rotate the latch component 6 against the torque generated by the latch spring 6, because the inclined edge 63 slides against the outer vertex 33 of the release element 32. This sliding rotation of the latch component 6 Figure 8b As shown by the oblique arrow A8, and continues until the outer apex 33 of the release element 32 is reached by the escape end 65 of the latch member edge 63. Figure 8a and 8b Such a pull-to-unlock position is shown. Figure 8b As shown by the longitudinal arrow A9 in FIG. 1 , the backward translation movement of the plunger subassembly 10 continues due to the action of the return spring 12 until the piston is restored. Figure 2a and 2b closed position.

[0086] Figure 9a and 9b It is shown that if the edge 63 of the latching member 6 is perpendicular to the longitudinal direction L, it is no longer possible for the user to pull the push head 1 to unlock the button 100. Figure 9b As shown, Figure 9a The locked position can only be released by the user rotating the push head 1 in the opposite direction. Figure 9b Shows something like Figure 7b Unlock by rotating.

[0087] like Fig.10As shown, the electrical system 200 is provided with a spring-loaded actuator 2022. Only a limited part of the housing of the electrical system 200 is shown in this figure. The spring-loaded actuator 202 can be a normally closed contact block. Reference numeral 203 indicates a spring inside such an actuator 202, which permanently pushes the movable rod 204 outward. The electrical contact pads in the spring-loaded actuator 202 are indicated by reference numerals 205a and 205b. The pad 205a is fixed, and the pad 205b is supported by the movable rod 204, so that it is pushed toward the fixed pad 205a by the spring 203. Such an actuator 202 is designed to maintain the electrical supply to the electrical system 200 as long as the movable rod 204 is not pressed in the longitudinal direction L. The electrical system 200 can be, for example, a manufacturing machine. Its body is provided with a female threaded hub 201, into which the mounting housing 2 of the button 100 is screwed. The hub 201 is located above the actuator 202 so that the plunger subassembly 10 contacts the movable rod 204 of the actuator 202. Therefore, in the operation of the actuator 202, the button 100 adds a locking function to the open state. Thus, an emergency stop key is provided to the electrical system 200, activated in an emergency, and released by the operator when safety is restored.

[0088] Finally, it should be reminded that all numerical values ​​mentioned in the above description are for illustrative purposes only and should not be considered as limiting in any case.

Claims

1. A button (100) adapted to be pressed by a user parallel to a pressing direction (L) and to remain in a locked pressed position until an unlocking action is performed by the user, wherein: The user presses the push head (1) of the button to drive at least a part of the plunger subassembly (10) to rotate, and the rotating part of the plunger subassembly then abuts against the release part present in the inner surface of the housing (30) of the button, thereby producing the locking of the pressed position, Characterized in that the plunger subassembly (10) comprises: - a translation to rotation conversion component (5), adapted to rotate by the user pressing the pusher head (1); - a latch member (6) having an edge (63) arranged to abut against a release portion in the inner surface of the housing (30) to produce the locking of the pressed position; and - A latch spring element (56) which is separate from the translation-to-rotation conversion component (5) and connects the latch component (6) to the translation-to-rotation conversion component, so that rotation of the translation-to-rotation conversion component drives the latch component through the latch spring element to a position causing the latch component to abut against a release portion in the inner surface of the housing (30).

2. The button (100) according to claim 1 further includes a pull-back spring (12) between the push head (1) and the shell (30) of the button, and the pull-back spring is arranged so that the user pressing the push head causes compression of the pull-back spring, and the compressed pull-back spring then completes the driving action of the latch spring element (56) to produce abutment of the latch component (6) against the release part in the inner surface of the shell.

3. The button (100) according to claim 1 or 2, wherein a user presses the push head (1) to cause the plunger subassembly (10) to move in translation in the pressing direction (L), and the plunger subassembly comprises the following components: - a central plunger (4) arranged to receive a pressing force due to the user pressing the pusher head (1) and to drive the plunger subassembly (10) into translational movement; - the translation-to-rotation conversion member (5) is arranged around the central plunger (4) and is rotatable relative to the central plunger; - the latch member (6), also arranged around the central plunger (4) and rotatable relative to the central plunger; as well as - said latch spring element (56), When the user presses the push head (1), the central plunger (4), the translation-to-rotation conversion component (5), the latch component (6) and the latch spring element (56) all perform the same translation motion component parallel to the pressing direction (L).

4. The button (100) according to claim 3, wherein: The latch spring element (56) is a torsion spring disposed between the translation-to-rotation conversion component (5) and the latch component (6), the torsion spring having turns arranged around the central plunger (4).

5. A button (100) according to claim 2 and a button (100) according to claim 3 or 4, wherein the edge (63) of the latch part (6) is perpendicular to the pressing direction (L) and extends between a recessed corner (64) of the latch part and an escape end (65) of the edge, so that a locked pressed position is produced by the edge of the latch part at the recessed corner abutting against the apex of the release part in the inner surface of the housing (30), and the reverse rotation of the plunger (4) causes the latch part to rotate and slide on the release part until the escape end reaches the apex of the release part, thereby allowing the return spring (12) to pull the plunger subassembly (10) in a return direction opposite to the pressing direction (L).

6. The button (100) according to claim 5, wherein: The pusher head (1) is arranged to contact the central plunger (4) so ​​that a reverse rotation applied to the pusher head by the user is transmitted to the central plunger.

7. The button (100) according to claim 5 or 6, wherein: The center plunger (4) is provided with a reverse inclined edge (73) arranged to contact another release portion present in the inner surface of the housing (30), and the return spring (12) pulls the center plunger (4) in the return direction through the sliding of the reverse inclined edge on the other release portion so that the center plunger rotates against the return force generated by the latch spring element (56).

8. The button (100) according to claim 7, wherein: The release portion and the further release portion belong to the same release element (32) located in the inner surface of the housing (30).

9. The button (100) according to claim 8, wherein: The reverse inclined edge (73) of the center plunger (4) is arranged so that when the pull-back spring (12) pulls the plunger subassembly (10) in the pull-back direction, the latch component (6) and the forward portion (7) of the center plunger supporting the reverse inclined edge slide simultaneously along the release element (32) on the opposite edge of the release element, and the latch spring element (56) causes the latch component and the forward portion of the center plunger to clamp the release element.

10. A button (100) according to claim 2 and a button (100) according to claim 3 or 4, wherein the edge (63) of the latch part (6) is inclined relative to the pressing direction (L) and extends between a recessed corner (64) of the latch part and an escape end (65) of the edge, so that the locked pressed position is generated by the edge of the latch part at the recessed corner abutting against the apex of the release part in the inner surface of the shell (30), and the translational displacement of the center plunger (4) in a pull-back direction opposite to the pressing direction (L) causes the latch part to rotate and slide on the release part until the escape end reaches the apex of the release part, thereby allowing the return spring (12) to further pull the plunger subassembly (10) in the pull-back direction.

11. The button (100) according to claim 10, wherein: The pusher head (1) is arranged to contact the central plunger (4) so ​​that a pulling displacement applied to the pusher head by the user is transmitted to the central plunger to cause the central plunger to translate in the pulling direction.

12. The button (100) according to one of the preceding claims further comprises a trigger spring (14) interposed between the push head (1) and the plunger subassembly (10) and arranged to transfer at least a portion of the translational movement applied to the push head by the user to the plunger subassembly along the pressing direction (L).

13. A button (100) according to one of the preceding claims, wherein the inner surfaces of the push head (1), the plunger subassembly (10) and the housing (30) are designed to remain identical by rotating 120° around an axis parallel to the pressing direction (L).

14. An electrical system (200) comprising a spring-loaded actuator (202) designed to be operated by a user pressing on the actuator, and further comprising a button (100) according to one of the preceding claims, which is arranged above the actuator so as to provide a locking function to the pressed state of the actuator.

15. The electrical system (200) of claim 14, wherein: The actuator (202) and the button (100) form a stop button for the electrical system.

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