Control device for timepiece

Abstract

To provide a control device for a timepiece, which is compact, durable, and easy to manipulate.SOLUTION: A control device 1 for a timepiece is provided, for driving the mechanism of the timepiece. A body 4 includes first coupling means, and a crown head 5 includes second coupling means, the first and second coupling means are arranged such that when the crown head 5 is in its first position, the body 4 and the crown head 5 are uncoupled, and when the crown head 5 is in its second position, the body 4 and the crown head 5 are coupled. The control device further includes a locking element 6, a first formation, and a second formation, the locking element 6 being able to cooperate with the first formation to stabilize the crown head 5 in its first position, and the locking element 6 being able to cooperate with the second formation to stabilize the crown head 5 in its second position. The locking element 6 is integral with or fixed to the crown head 5, and the first and second formations are integral with or fixed to the body 1, or the locking element 6 is integral with or fixed to the body 1, and the first and second formations are integral with or fixed to the crown head 5.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a control device for a timepiece, the control device comprising a translatable crown head. The invention also relates to a timepiece comprising such a control device. [Background technology]

[0002] Some watches are provided with a control device that serves to operate the watch's mechanisms, such as the mechanism for rewinding the barrel or the mechanism for setting the time. The control device includes a crown head that can be moved between two positions. The first position, called the decoupled position, is a position in which rotation of the crown head does not drive any particular mechanism. The second position, called the coupled position, is a position in which the crown head is coupled to the crown body. Rotation of the crown head drives the rotation of the crown body, which drives the mechanism in question.

[0003] Known control devices have all or some of the following drawbacks: - Rapid wear due to intentional or unintentional actuation of the crown head. - It is large and greatly limits the aesthetic appeal of the watch. - The crown is difficult to operate. - The control device is awkward when the crown head occupies one or the other of the coupled or separated positions. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide a control device and a timepiece including said control device which remedy the above-mentioned drawbacks and which improves on the control devices and timepieces known from the prior art.

[0005] More particularly, the subject of the invention is a control device for a timepiece, which control device is particularly compact, durable and easy to operate. [Means for solving the problem]

[0006] According to a first aspect of the invention, a control device is defined in claim 1.

[0007] According to a second aspect of the invention, a control device is defined in claim 5.

[0008] Embodiments of the control device are defined in claims 2 to 4 and 6 to 9.

[0009] According to the invention, the watch is defined in claim 10.

[0010] Embodiments of the watch are defined in claims 11 and 12.

[0011] The subject matter, features, and advantages of the present invention will be described in detail in the non-limiting description of certain specific embodiments given below with reference to the accompanying drawings. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view of a control device according to one embodiment of the present invention, where the control device is integrated into a watch case and the crown head of the control device is in a first position, referred to as the detached position. [Figure 2] FIG. 2 is a cross-sectional view of the control device with the crown head in a second position, referred to as the binding position. [Figure 3] FIG. 3 is a partial top view of the control device. [Figure 4] FIG. 4 is an exploded perspective top view of the control device. [Figure 5] FIG. 5 is an exploded perspective bottom view of the control device. DETAILED DESCRIPTION OF THE INVENTION

[0013] Figures 1 to 5 illustrate a control device 1 according to one embodiment of the present invention. The control device is integrated into a case 2 of a timepiece. The timepiece may, inter alia, be a wristwatch or a pocket watch. Case 2 is part of the case of the timepiece. Case 2 comprises a lateral side provided with a circular opening 21 in which control device 1 is arranged. Control device 1 is connected to at least one first mechanism, or movement, an element 3 of which is partially visible in Figures 1 and 2. The first mechanism is arranged within the case. The first mechanism may, for example, be a mechanism for rewinding the barrel of the timepiece or a mechanism for setting the time.

[0014] The control device comprises, inter alia, a body 4 , which may also be called a crown body, a crown head 5 , and a locking element 6 .

[0015] The body 4 is mounted rotatably within the case body 2 around the axis of rotation X. To this end, the body 4 comprises an outer cylindrical wall 41 which forms a plain bearing cooperating with a cylindrical wall delimiting the opening 21 of the case body 2. The cooperation of the cylindrical outer wall 41 with the opening 21 ensures that the body 4 is rotationally guided relative to the case body 2. To prevent particles and / or liquids from entering the watch, a seal 7, for example of an annular shape, is advantageously provided at the contact surface between the cylindrical outer wall 41 and the opening 21. The seal 7 is arranged in a groove 42 provided in the outer cylindrical wall 41. The seal is dimensioned to be in contact with the cylindrical wall of the case body 2 which delimits the opening 21. As a variant of this embodiment, a groove may also be provided in the cylindrical wall delimiting the opening 21, the seal supported in said groove then cooperating with the cylindrical wall of the body 4.

[0016] Furthermore, the body 4 is held axially (i.e. parallel to the rotation axis X) on the case body 2. In particular, the body 4 comprises a shoulder 43 which is held on the one hand on the surface 22 of the case body 2 adjacent to the opening 21 and on the other hand on a retaining plate 8 fixed to the case body 2. Advantageously, a gap is provided between the shoulder 43, the surface 22 and the retaining plate 8 to allow the body 4 to rotate without friction. Thus, the body 4 cannot move in translation relative to the case body 2. The body 4 has one degree of freedom of rotation relative to the case body 2.

[0017] The body 4 is fixed to the element 3 in order to drive the first mechanism. To this end, the body 4 comprises an opening 44 (visible in FIG. 5 ) with a square cross section, centred about the axis of rotation X. The opening 44 accommodates a pin 31 which is integral with the element 3 and has a shape complementary to that of the opening 44. Alternatively, the connection between the element 3 and the body 4 may be obtained by any other means, in particular by screw fastening. It is noted that "integral" here is understood to mean a mechanical connection without degrees of freedom. Two elements which are integral with each other are therefore two elements which are fixed to each other.

[0018] The retaining plate 8 includes an opening 81 through which the pin 31 passes. The retaining plate 8 includes a surface 82 that is flush with the surface of the base 45 of the body 4. The retaining plate 8 also includes a counterbore 83 upon which the shoulder 43 rests. As such, the retaining plate does not increase the overall size of the control device.

[0019] The crown head 5 is translatable relative to the body 4, parallel to the axis of rotation X, between a first position, called the decoupled position (shown in FIG. 1), and a second position, called the coupled position (shown in FIG. 2).

[0020] The crown head mainly comprises a disk 51 intended to be operated by the user's finger and a cylindrical part 52 capable of cooperating with the body 4 when the crown head is in the second position. The crown head 5 is configured to be pulled out from its first position to its second position and to be pushed in from its second position to its first position. In other words, the first position of the crown head corresponds to a position where it is pushed in, or in other words stored, with respect to the case body 2. The second position of the crown head corresponds to a position where it is deployed, or in other words pulled out. It is observed that the passage from the first position to the second position is not achieved by screwing or unscrewing the crown head.

[0021] As can be seen in Figures 1, 2, and 4, the main body 4 includes an annular opening 49 capable of receiving the cylindrical portion 52 of the crown head therein. In other words, the annular opening 49 is capable of accommodating the cylindrical portion 52. The annular opening 49 is centered about the rotation axis X. The annular opening 49 is radially bounded by a first wall 410 of overall cylindrical shape that forms the outer wall of the annular opening, and a second wall 411 that forms the inner wall of the annular opening. The annular opening 49 is a blind opening, i.e., not a through opening. The first wall is connected to the second wall at the base 45 of the main body 4. The depth of the annular opening 49 along the rotation axis X is substantially equal to the height of the cylindrical portion along that axis.

[0022] The body 4 includes first coupling means 46, and the crown head 5 includes second coupling means 53. In this case, the first coupling means 46 are formed by a first set of linear splines. These splines, also called sawtooth, are arranged parallel to the axis of rotation X and are distributed along the first wall 410. More precisely, the first set of splines extend over only approximately a portion (in particular half) of the height of the first wall 410. The portion of the wall 410 along which the first set of splines extend is positioned more towards the disc 51. Thus, the wall 410 includes a spline-free area 414 positioned more towards the base 45.

[0023] The second coupling means 53 are also formed by a second set of linear splines arranged parallel to the axis of rotation X and distributed along the outer wall 56 of the cylindrical part, said outer wall 56 also having a cylindrical shape centred about the axis of rotation X. The first set of linear splines is visible, in particular, in Figure 4 and the second set of linear splines is visible, in particular, in Figure 5.

[0024] As can be seen in Figure 1, when the crown head is in its first position, the first coupling means 46 occupies a position offset along the axis of rotation X relative to the second coupling means 53. The first set of splines does not contact the second set of splines, so that the body 4 and the crown head 5 are separated.

[0025] As can be seen in Figure 2, when the crown head is in its second position, the first coupling means 46 is located opposite the second coupling means. The first set of splines mates with the second set of splines. The body 4 and the crown head 5 are coupled, i.e., rotationally coupled. Thus, when the crown head 5 is in its second position, rotation of the crown head about the rotation axis X drives the body 4, which in turn drives the first mechanism element 3. In this way, the control device can be described as a control device with a separable crown.

[0026] The first coupling means 46 may be integrated in a ring 412 fixed to the body 4. The ring 412 may be fixed to the body 4, inter alia, by press fitting. Thus, the body 4 may be formed as a two-part assembly, which allows for an easier manufacturing process. Alternatively, the body 4 may be a single piece machined from one block of the same material.

[0027] The locking element 6 is an element that holds the crown head in its position, in other words, an indexing means. The locking element 6 is configured to selectively cooperate with the first structure 47A and the second structure 47B. More specifically, the locking element 6 can cooperate with the first structure 47A to stabilize the crown head in its first position. Similarly, the locking element 6 can cooperate with the second structure 47B to stabilize the crown head in its second position. The set of the two structures 47A, 47B therefore more generally constitutes a first indexing means, and the locking element 6 more generally constitutes a second indexing means that can cooperate with the first indexing means. The first and second positions of the crown head are mechanically stable positions. When the crown head is moved near its first or second position, the cooperation of the two indexing means allows the crown head to be accurately positioned in its first or second position, respectively.

[0028] According to the illustrated embodiment, the locking element 6 is integral with the crown head 5, while the first and second structures 47A, 47B are integral with the main body. In particular, the locking element 6 is held in a groove 54 in the cylindrical portion 52. The groove 54 is formed in the cylindrical inner wall 55 of the cylindrical portion 52. The dimensions of the groove 54 allow a small gap between the groove and the end of the locking element, in particular to allow deformation of the locking element 6 when the control device is used. Therefore, the phrase "locking element integral with the crown head" is understood to mean that there is a mechanical connection between the two elements to ensure sufficient retention of the crown head by the locking element to achieve the indexing function. The first and second structures are formed in the second wall 411 of the annular opening 49, facing the inner wall 55. The first and second structures are positioned next to each other along the longitudinal axis X. The distance separating the first structure from the second structure along the rotation axis X corresponds to the amplitude of movement of the crown head between the first and second positions.

[0029] According to the illustrated embodiment, the locking element 6 has a shape exhibiting rotational symmetry centered about the rotation axis X, in particular a circular toroidal shape. The locking element may, for example, be an elastomeric ring or a snap ring. The first and second structures are grooves having a shape substantially complementary to the shape of a portion of the locking element. In particular, the grooves have a cross section in the shape of a circular arc. When passing from the first position to the second position, the locking element 6 is compressed in the groove 54 and relaxes when received in one or the other of the first and second structures. The selection of the dimensions of the groove 54, the locking element, and the first and second structures makes it possible to adjust the holding force generated on the crown head in order to hold the crown head in its first and second positions.

[0030] According to one variant (not shown), the locking element 6 may be integral with the body 4 and the first and second structures 47A, 47B may be integral with the crown head. In particular, the locking element may be held in a groove formed in the second wall 411 and the first and second structures may be created in the inner wall 55 of the barrel.

[0031] According to another embodiment variant (not shown), the first and second connecting means 46, 53 may be arranged on the second wall 411 of the annular opening 49 and on the inner wall 55 of the cylindrical portion 52, respectively, in which case the locking element 6 would be arranged on the outer wall 56 of the cylindrical portion 52 and the first and second structures 47A, 47B would be arranged on the first wall 410 of the annular opening 49.

[0032] According to yet another embodiment variant (not shown), the first and second connecting means 46, 53 may be arranged on the second wall 41 of the annular opening 49 and on the inner wall 55 of the cylindrical portion 52, respectively, in which case the locking element 6 would be arranged on the first wall 410 of the annular opening 49 and the first and second structures 47A, 47B would be arranged on the outer wall 56 of the cylindrical portion 52.

[0033] Regardless of the configuration selected from the above-mentioned variants, a particularly compact control device is obtained. In particular, thanks to the annular shape of the opening 49, the body 4 comprises three concentric walls 41, 410, and 411, each ensuring the function of the control device. The first wall 410 accommodates the first coupling means and a free area 414 lacking such coupling means, the second wall 411 accommodates the indexing means, and the outer wall 41 forms a guide for guiding the body 4 in rotation. The dimension of the body 4 along the rotation axis X is therefore determined solely by the minimum height of each of these three walls 41, 410, and 411. Likewise, the annular opening 49 coincides with the cylindrical portion 52 of the crown head, which comprises two concentric walls 55, 56, each ensuring the function of the control device. The inner wall 55 accommodates the indexing means, and the outer wall 56 accommodates the second coupling means.

[0034] The crown head further includes a rotation prevention means 57 configured to prevent rotation of the crown head when the crown head is in the first position. In particular, the rotation prevention means 57 is formed by a toothed gear that is integral with the disc 51. The toothed gear is fixed, for example by press fitting, to the underside of the disc, i.e., the face of the disc 51 facing the case body. This allows the toothed gear to remain invisible and be protected from impacts. The toothed gear is integrated into an annular groove provided in the disc 51. The toothed gear includes a plurality of teeth that extend radially, i.e., perpendicular to the axis of rotation X. As can be seen in FIG. 3 (where the crown head is depicted transparently), the toothed gear cooperates with two protrusions 23 formed on the case body 2 to prevent rotation of the crown head when the crown head is in the first position. Each of the protrusions 23 is positioned between two adjacent teeth of the toothed gear. In variants, the number of projections may be different, for example one projection, three or more projections, or the same number of projections as the number of teeth on the toothed wheel. In another variant, the toothed wheel and the crown head may form one and the same integral part. In yet another variant, the projection may be integrated into the disc 51 and cooperate with a jagged opening formed in the case body.

[0035] Finally, the control device 1 also includes a retaining means 9 which cooperates with a retaining surface 58 of the crown head to limit the translational movement of the crown head parallel to the axis of rotation X. In this case, the retaining means 9 is formed by a retaining screw which is integral with the body 4 and passes through an opening 59 in the crown head. The retaining screw extends parallel to the axis of rotation X and is centred on the axis of rotation. The retaining screw cooperates with a threaded opening 413 provided in the centre of the body 4. The retaining screw includes a screw head 91 which forms a stop which cooperates with the retaining surface 58 to prevent separation of the crown head from the body 4.

[0036] According to an alternative embodiment, the control device 1 may not include such a retaining means, since the cooperation of the locking element and the structure 47B already provides the first means for retaining the crown head to the body. In this case, the diameter of the second wall 411 may be slightly enlarged at least in a portion 414 of the second wall that is comprised between the structure 47B and the end of the second wall. In this case, the crown head may be assembled to the body 4 by an interference fit of the retaining element 6 with the portion 414 and / or by heating or cooling the crown head 5 or the body 4, respectively. Advantageously, the force required to insert the retaining element 6 into the portion 414 is much greater than the force that a user would conventionally apply to move the crown head from the first position to the second position, thereby preventing unintentional detachment of the crown head.

[0037] The timepiece may advantageously comprise a first mechanism, in particular a mechanism for rewinding the barrel, and a second mechanism, in particular a mechanism for setting the time. Body 4 may be directly or indirectly connected to the first mechanism such that the first mechanism is activated when the crown head is rotated in a first direction of rotation. Body 4 may be directly or indirectly connected to the second mechanism such that the second mechanism is activated when the crown head is rotated in a second direction of rotation opposite to the first direction of rotation. The visible face of disc 51 may therefore comprise an informative or aesthetic design, such as an arrow indicating that the crown head can be activated in two opposite directions of rotation.

[0038] It should also be noted that the disc 51 may include an outer periphery provided with a design, such as a set of slots, to improve the finger grip on the crown head. According to an alternative embodiment, the anti-rotation means 57 may be formed by a set of slots arranged on the outer periphery of the disc 51, rather than by a toothed gear arranged on the underside of the disc. This simplifies the manufacturing process of the control device.

[0039] When the crown head is in the first position during use of the watch, it is prevented from rotating due to the cooperation of the rotation prevention means 57 and the two projections 23 on the case body 2. This prevents sliding movements at the contact surface between the locking element 6 and the main body 4, and prevents wear on the locking element 6. There is no risk of the crown head rotating due to unwanted manipulation, so the crown head remains in a predetermined position, thereby optimizing the overall aesthetics of the watch. Finally, in this position, the main body 4 is separated from the crown head 5 and is therefore free to rotate about the rotation axis X without driving the crown head in rotation. The first mechanism element 3 is also rotatable about the rotation axis X.

[0040] To move from the first position to the second position, the user of the watch grasps the disk 51 and pulls it parallel to the rotation axis X. The anti-rotation means 57 moves away from the protrusion 23, thereby allowing the crown head to rotate. The first and second coupling means are positioned opposite each other. The crown head 5 then rotates together with the body 4. If the first set of splines is not positioned correctly opposite the second set of splines, rotation of the crown head relative to the body may be required. The smaller the rotation, the greater the number of splines that make up the first and second sets of splines. The ends of the splines may be beveled to facilitate spline engagement. If the body 4 is kept stationary when the crown head is in the first position, the first set of splines will automatically align with the second set of splines.

[0041] When the crown head is in the second position, the first and second coupling means cooperate so that the crown head is fixed to and rotates with the body 4. To rewind the barrel or set the time, the user rotates the crown head in one direction or the other about the axis of rotation X, thereby driving the element 3 in rotation. The coupling between the crown head and the body prevents any relative rotational movement between these two parts. The locking element is therefore not subjected to any loads associated with its sliding relative to the body 4 and is therefore not subject to wear.

[0042] Finally, when the user has finished rotating the crown head, he or she presses the crown head so that it returns to the first position, whereupon the first and second coupling elements separate. A slight rotation of the crown may be required to position the protrusion 23 between two adjacent teeth of the rotation prevention means 57.

[0043] The present invention provides a control device in which the crown head is movable between a position where it is separated from the body and a position where it is coupled to the body. The two positions of the crown head are stable due to cooperation between the locking element and the first and second structures. When the crown head is rotated, the locking element does not slide relative to the body. Therefore, there is no wear of the locking element when the control device is in use. In this way, the stability of the first and second positions of the crown head is maintained throughout the life of the watch. Furthermore, the control device thus obtained is particularly compact. It can be easily integrated into smaller watches. [Explanation of symbols]

[0044] 1. Control device 2 Case body 3 Elements 4 Main unit 5 Crown head 6 Locking element 8 Holding plate 9 Retention means 21 Aperture 23 Protrusion 41 Cylindrical outer wall 42 Groove 43 Shoulder 44 Aperture 45 Base 46 First coupling means 47A First structure 47B Second structure 49 Annular opening 52 Cylindrical part 53 Second coupling means 55 Inner wall 56 Exterior Wall 57 Rotation prevention means 58 Retention surface 59 Aperture

Claims

1. a body (4) intended to be mounted rotatably about an axis of rotation (X) on the case (2) of the timepiece in order to drive the mechanism of the timepiece; a crown head (5) translatable relative to the body parallel to the axis of rotation between a first position and a second position; A control device (1) for a timepiece, comprising: The body includes a first coupling means (46) and the crown head includes a second coupling means (53), and the first and second coupling means are arranged such that when the crown head is in a first position, the body and the crown head are separated, and when the crown head is in a second position, the body and the crown head are coupled; The control device further includes a locking element (6), a first structure (47A) and a second structure (47B), the locking element being cooperable with the first structure to stabilize the crown head in the first position and cooperable with the second structure to stabilize the crown head in the second position; the locking element is integral with or fixed to the crown head, and the first and second structures are integral with or fixed to the body, or the locking element is integral with or fixed to the body, and the first and second structures are integral with or fixed to the crown head; Control device (1).

2. the locking element (6) has a shape exhibiting rotational symmetry centered about the rotation axis (X), and the first and second structures (47A, 47B) are grooves having a shape substantially complementary to the shape of a portion of the locking element; A control device (1) according to claim 1.

3. the crown head (5) comprises a cylindrical portion (52), the body comprises an annular opening (49) capable of receiving the cylindrical portion therein, the second coupling means (53) is arranged on a first wall (56) of the cylindrical portion, and the locking element or the first and second structures are arranged on a second wall (55) of the cylindrical portion, the second wall facing the first wall; A control device (1) according to claim 1.

4. the locking element (6) is integral with or fixed to the crown head (5), and the first and second structures (47A, 47B) are integral with or fixed to the body (4); and / or The first wall (56) is an outer wall of the cylindrical portion, and the second wall (55) is an inner wall of the cylindrical portion. A control device (1) according to claim 3.

5. a body (4) intended to be mounted rotatably about an axis of rotation (X) on the case (2) of the timepiece in order to drive the mechanism of the timepiece; a crown head (5) translatable relative to the body parallel to the axis of rotation between a first position and a second position; A control device (1) for a timepiece, comprising: The body includes a first coupling means (46) and the crown head includes a second coupling means (53), and the first and second coupling means are arranged such that when the crown head is in a first position, the body and the crown head are separated, and when the crown head is in a second position, the body and the crown head are coupled; The body includes first indexing means (47A, 47B), the crown head includes second indexing means (6), and the first and second indexing means are arranged to stabilize the crown head in the first position and the second position; The crown head includes a cylindrical portion (52), the body includes an annular opening (49) receivable within the cylindrical portion, the second coupling means is disposed on a first wall of the cylindrical portion, and the second indexing means is disposed on a second wall of the cylindrical portion, the second wall facing the first wall. Control device (1).

6. the first coupling means (46) includes a first set of splines and the second coupling means (53) includes a second set of splines; A control device (1) according to claim 1.

7. the control device comprises a retaining means (9) integral with the body (4) and passing through an opening (59) in the crown head (5), said retaining means cooperating with a retaining surface (58) to limit the translational movement of the crown head parallel to the axis of rotation (X); A control device (1) according to claim 1.

8. the body (4) comprises a cylindrical wall (41) forming a bearing cooperable with a circular opening (21) in the case shell (2) for guiding the body in rotation about the axis of rotation (X); A control device (1) according to claim 1.

9. the crown head (5) further comprises a rotation prevention means (57) configured to cooperate with an element of the case body (2) to prevent rotation of the crown head when the crown head is in the first position; A control device (1) according to claim 1.

10. A timepiece comprising a case (2) provided with an opening (21) and a control device (1) according to claim 1, said control device being arranged in said opening. clock.

11. A timepiece comprising a case body (2) provided with an opening (21) and a control device (1) according to claim 9, wherein the control device is arranged in the opening, the rotation preventing means (57) is a toothed gear, and the case body comprises at least one protrusion (23) capable of cooperating with the toothed gear to prevent rotation of the crown head when the crown head is in the first position. clock.

12. The timepiece comprises a first mechanism and a second mechanism, and the body (4) of the control device (1) is coupled to the first mechanism and the second mechanism such that the first mechanism is activated when the crown head (5) is rotated in a first direction of rotation and the second mechanism is activated when the crown head (5) is rotated in a second direction of rotation opposite to the first direction of rotation.

11. The watch according to claim 10.

13. The first mechanism is a mechanism for rewinding the barrel, and the second mechanism is a mechanism for adjusting the time.

13. The watch according to claim 12.

14. The timepiece includes a first mechanism and a second mechanism, and the body (4) of the control device (1) is connected to the first mechanism and the second mechanism such that the first mechanism is activated when the crown head (5) is rotated in a first direction of rotation, and the second mechanism is activated when the crown head (5) is rotated in a second direction of rotation opposite to the first direction of rotation.

12. The watch according to claim 11.

15. The first mechanism is a mechanism for rewinding the barrel, and the second mechanism is a mechanism for adjusting the time.

15. The watch of claim 14.

16. The locking element (6) has a circular ring shape. A control device (1) according to claim 2.

17. The first wall (56) is an outer wall of the cylindrical portion and the second wall (55) is an inner wall of the cylindrical portion, or The first wall (56) is an inner wall of the cylindrical portion, and the second wall (55) is an outer wall of the cylindrical portion. A control device (1) according to claim 5.

18. The retaining means (9) is a retaining screw. A control device (1) according to claim 7.

19. The rotation prevention means (57) is a toothed gear. A control device (1) according to claim 9.

20. The element of the case body (2) is a protrusion (23) that cooperates with the toothed gear.

20. The control device (1) according to claim 19.

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