WO2014063264A2

WO2014063264A2 - Watch

Info

Publication number: WO2014063264A2
Application number: PCT/CH2013/000186
Authority: WO
Inventors: Markus Lehmann; Andreas Strehler
Original assignee: Lehmann Präzisionstechnik Gmbh
Priority date: 2012-10-26
Filing date: 2013-10-28
Publication date: 2014-05-01
Also published as: CH709075B1; WO2014063264A3; DE112013005156B4; DE112013005156A5; CH707129A1

Abstract

A crown system (11) comprising a stem (15), in particular a winding stem, and a crown (13) on the stem (15) is characterized in that the stem (15) comprises an additional sliding part (17) and in that the stem (15) and the sliding part (17) can slide relative to one another by a specific distance or sliding path. The additional sliding part extends the stem by the sliding path so that the crown (13) can be accommodated in a watch case without the movement requiring any modification.

Description

Clock

The invention relates to a timepiece according to the preamble of claim 1. Prior art:

Wrist or pocket watches, which are designed mechanically, usually obtain the energy required for operation from a spring, which must be stretched or pulled up at regular intervals. If this is not done, the clock will stop and it must be reset if necessary. This is particularly associated with great effort when the clock is still connected to other elements, such as a calendar, moon phases or the like.

The winding of a wristwatch happens by a outside of the watch case, sitting at the end of the pendant, mounted on the elevator shaft thumbscrew, which is referred to in the jargon as "crown" or "winding crown". In automatic watches, this is also achieved via an assembly of the movement, which spans the spring via a transmission by the movement of the clock. By turning the crown, a tension spring can be tensioned and the energy required for the continuous operation of the watch can be stored.

In addition to winding the clock can usually be adjusted by pulling out the crown and the hands to - once the clock has stopped - again set the correct time of day. Often crowned crowns are also used to set the moon phase, day of the week and month for more complicated clocks.

A well-known problem of crowns is their susceptibility to mechanical damage

Damage, as these usually protrude laterally from the watch case. To prevent damage to the crown, many embodiments of watches on so-called shock horns. These are on both sides of the respective winding crown on watch case arranged or molded projections that prevent damage to the shaft on which the elevator crown is located at a mechanical stress of the clock in the crown area. Alternatively, the watch may be equipped with a bracket to protect the crown from mechanical damage.

The disadvantage of these safeguards is that they not only make the watch heavier, but also chunkier, which adversely affects the appearance of the clock.

It would be conceivable to sink the crown in the watch case. However, in conventional mechanical movements of the displacement of the elevator shaft is limited to a few millimeters. This limited displacement of the elevator shaft would not be sufficient to bring the crown from the sheltered rest position to a lying outside the watch case working position in which the crown could be operated by the watch carrier. DE-OS-39 36 942 discloses a push-button arrangement for actuating a controllable element of a watch, with a radially from the watch case

protruding key head, which is arranged axially displaceable. To the

Key head is arranged an actuating plunger, which is displaceable by means of the key head through a recess in the watch case, axially into the housing interior and through which the controllable element is actuated. Here are key head and

Actuator plunger towards the housing interior spring beaufschlagbar. Key head and actuating plunger are axially displaceable against each other against a spring force. When the housing of the key top housing ferneer the actuating plunger is blocked in its housing outer position by a housing-fixed locking element. With the housing closer to the position of the key top, the locking element is movable by the key top into a position which lifts the blocking of the actuating tappet. In DE-OS-39 36 942 the described axial movement is thus the pusher stroke in order to trigger the switching functions can. In the rest position, the crown head is outside the watch case. ^'WO 2005/038538 shows a control device with push crown for a timepiece with an opening aufweisendem supporting element which can be fixed to the casing of the watch or represents the watch case itself. A rotary drive part, which can be connected to the clock (M) of the clock, serves to control the first and second functions of the clock. A crown comprising a head and an extension connected to the head is movable with respect to the support member in its

Opening attached. The extension can cooperate with a control of a third function of the clock, which is located inside the watch case. Furthermore, coupling means are provided to the driving part and the

Extension of the crown in rotation and translation to connect in the pulling direction, wherein the crown, when the clock is equipped with the control device, a first stable and a second stable pulled axial position can take, in which the rotation of the drive member, which is predetermined by the crown, the first and the second function controls. The crown can also be pushed from the first axial position to a second axial position for activation of the control independent of the first and second ^■ function which are controlled by the driving part. First elastic means are provided between the driving part and the head of the crown. Their force is sufficient to overcome the resistance that is provided by the drive part in the transition from the second axial position of the crown in the first. Second elastic means are arranged between the support part and the head of the crown. The second elastic means are compressed in the transition from the first axial position of the crown to the second position for activation of the control to return the crown to the first axial position after the shear stress exerted on the crown has subsided. Again, the crown is not sunk in the housing in the normal position. The housing next position is exercised only when the trigger function. It should also be noted that the

Control not used to lock the crown in the rest position.

Swiss Patent No. 241 963 discloses a pusher for the operation of the chronograph functions (start-stop-zeroing) of a timepiece. In contrast to this, a crown system is concerned with the setting of the date, the time or the elevator of the clock. The pusher of CH patent no. 241 963 has a shaft on which a sleeve is arranged axially movable. The sleeve is received in a tube which protrudes from the watch case, axially movable. Attached to the tube is a crown head, which is supported by a spring, which is supported on the tube in a

is pre-stressed housing-distal end position. By pressing the crown head, the shaft can interact with a rocker to make adjustments to the clock.

task

Consequently, there is a need for a watch in which the winding crown is well protected against mechanical damage.

description

The invention relates to a watch with a watch case, a recorded in the watch case movement and an opening for receiving a crown system. In the opening, a crown system is used which has a shaft, preferably an elevator shaft, and a crown head arranged on the shaft. On the Shaft is placed on a sliding part, which forms a telescopic, axial extension of the shaft. The crown head is arranged on the displacement part and can assume at least first and second stable axial positions. The first axial position is a housing inner position of the crown head, in which this substantially completely or at least largely disposed within the watch case, and the second axial position is a housing outer position of the crown head, in which this is arranged substantially outside the watch case, so that he Thumb and index finger can be detected. According to the invention, a crown system according to the preamble of claim 1, characterized in that the first housing near the axial displacement position

Rest position is, in which the crown head largely in the watch case

is included. In the context of the present invention, "accommodated in the watch case" is to be understood as meaning that the crown head in the rest position is at least 50%, preferably at least 60% and particularly preferably at least 75% of its axial extent within the periphery of the

Watch case is added. Preferably, the crown head is in the

Rest position, however, practically complete, i. at least 90% of the axial

Extension, housed in the watch case. This embodiment has the advantage that the crown head is recessed in the rest position in the watch case, since the shaft is telescopically adjustable in length, as a result of which the crown head can cover a larger displacement path as is the case with conventional crown systems.

Expediently, the displacement part has an engagement means, which can cooperate with an elastic means and allows a locking of the shaft in the rest position. Such a means of attack may be, for example, a notch, bulge, thickening, projection or annular groove. In cooperation with a latch or a spring element, the crown can be detected in the rest position, i. assume a stable axial locking position.

Advantageously, a sliding part is present between the crown and the shaft, which allows a displacement of the crown head relative to the shaft. The displacement part can be realized for example by a sleeve which is arranged on the crown is and is guided axially displaceably on the shaft. Such a guide device can be produced inexpensively.

According to a particularly preferred embodiment, a spring element is provided between the shaft and the crown, which moves the crown arranged on the displacement part into an extended working position, e.g. Elevator and / or adjustment position, pretensioned. This embodiment has the advantage that the crown can automatically drive out of the watch case as soon as the locking device, which holds the crown in the rest position, is released. An advantageous embodiment therefore provides to arrange the spring element in an axial bore of the shaft. Conveniently, the spring element is held by the crown or a closure member in the bore.

Advantageously, the crown is designed as a hollow cylinder closed on one side, in which the sleeve is inserted. If there is an annular space between the rear portion of the sleeve and the wall of the hollow cylinder, a retaining element, e.g. Tubus, be included in the annulus.

Preferably, the shaft is at least two parts and preferably at least three parts. This brings advantages in the production and assembly with it.

Advantageously, the sleeve in a tube, which is used in a watch case, guided axially displaceable. However, it is also conceivable that the tube part of the

Watch case is, resp. the latter is designed accordingly. Through the tube, the sleeve and in the sleeve axially displaceable (elevator) shaft are set in the watch case. Conveniently, the rear part of the tube resp. The corresponding watch case part is received in the rest position of the crown system in the annular space between the inner wall of the crown head and the sleeve.

To be able to grasp the crown well with your fingers, the crown has knurls. In addition, the rear end of the crown is formed by a radially projecting annular bead.

According to a preferred embodiment, the tube is a certain distance, preferably at least 1 mm and more preferably at least 2 mm set back from the periphery in the watch case, so that the crown in the

Essentially incorporated in the watch case. Preferably, the crown is in the rest position disposed within the periphery of the watch case. However, it is also conceivable that the crown in the radial direction at most 3 mm, preferably less than 2 mm, and most preferably less than 1 mm over the

Periphery of the watch case protrudes. As the periphery of the watch case, the imaginary continuation of the watch case on the (radial) opening for receiving the crown system is to be understood, if the crown system is not used. In an oval watch case, the periphery of the same would correspond to a uniform continuation of the radius of curvature of the watch case, with a rectangular basic shape of a watch case a straight line

(Watch case edge)

An advantage is at the back of the watch case in the area of the crown a

Recess provided so that at least the edge of the crown to pull out the same is accessible.

Advantageously, a spring element is provided in the watch case, which is arranged so that it with the engagement means in the rest position of the crown system

can interact. By the spring element is a cost-effective and reliable locking of the shaft in the rest position possible.

An embodiment of the invention will now be described with reference to FIGS

Drawings described. It shows:

Figure 1: In cross section, an inventive crown system with a crown and an axially slidably received in the crown elevator shaft;

Figure 2: The crown system in an exploded view;

Figure 3 The crown system of Figure 1 installed in a watch case. and

Figure 4: A perspective view of the used in the watch case of a clock

Crown system, which for the sake of clarity not essential to the invention parts of the clock have been omitted.

The crown system 11 shown in FIGS. 1 and 2 comprises a crown 13 and an elevator shaft 5 arranged on the crown 13, the crown 13 being guided axially displaceably on the elevator shaft 15. That is, the crown 13 may be of a retracted rest position in which these for the most part or preferably completely housed in a watch case, in a pulled out

Working position, in which the crown can be grasped with thumb and forefinger moved. For this purpose, a sleeve 17 is provided, which is inserted into the crown 13 and the rear part 19 of the elevator shaft 15, hereinafter also referred to as an extension of the elevator shaft 15, receives. The elevator shaft 15 may be made in one piece or in two parts consisting of the rear part or extension 19 and a front part 20. Extension 19 and front part 20 can, as shown in the exemplary embodiment, be screwed together (FIGS. 1 and 3). The extension 19 of the elevator shaft 15 has a cylindrical rear

Guide portion 21 having a first diameter and a cylindrical front guide portion 23 having a second diameter, wherein the second diameter is smaller than the first diameter. The sleeve 17 in turn has a front end 24 with a reduced inner diameter, which substantially corresponds to the second diameter of the front guide portion 23. Due to the reduced diameter of the front end 24, an annular shoulder 25 is formed. Between this and the step formed by the rear guide portion 27, a distance or displacement is defined, the sleeve 17 can be pulled relative to the elevator shaft 15 from the watch case, without the shaft is moved axially. The displacement is at least 1 mm, preferably at least 2 mm and more preferably at least 3 mm.

The elevator shaft 15 resp. the extension 19 has an axial bore 29, in which a compression spring 31 is received. The compression spring 31 is supported at one end in the interior of the elevator shaft 15 and at the other end on a closure part 33, which is placed on the rear end of the sleeve 17. On the closure member 33, a pin 35 is arranged or formed, which extends into the bore 29 and the compression spring 31 penetrates partially in the longitudinal direction. The diameter of the pin 35 is slightly smaller than the defined by the windings 37 of the compression spring 31 inner diameter. Thus, the pin 35 provides for axial alignment of the compression spring 31 also in the working position of the crown system, i. when the annular shoulder 25 abuts the step 27 and the

Compression spring 31 is partially outside the bore 29. Thus, the compression spring 31 can be easily put on the pin 35, this is with a tip 39th

fitted. This ensures that even when using the crown system that there is no unwanted collision or increased friction between the pin 35 and the windings 37 of the compression spring 31 when pushing in the crown.

The sleeve 17 has at its rear end serving as a mounting portion collar 41, which has an annular shoulder 43 at the end. The annular shoulder 43 serves as a seat for the disc or the closure part 33. The disc or the

Closure part 33 can be pressed, glued, soldered, welded or screwed to the collar 41. On the outer wall of the collar 41, an external thread 45 is provided for fastening the sleeve 17 to the crown thirteenth

The crown 13 is formed as a hollow cylinder 47 closed on one side, in which an internal thread 49 is provided adjacent to the bottom. With the

Internal thread 49, the sleeve 17 may be releasably connected to the crown 13. The solubility itself has no meaning for the function, but concerns only the

Assembly. On the outer circumference has the crown 13 to improve the grip knurl 50. In addition, the crown 13 has a radially outwardly projecting edge 52 which is in the rest position substantially within the periphery 71 (Fig. 4) of the watch case.

Between the inner wall of the hollow cylinder 47 and the sleeve 17, an annular space 51 is present, which serves to receive a tube 53. In the tube 53 itself, the sleeve 17 is received axially displaceable. The difference in length of sleeve 17 and tube 53 corresponds approximately to the displacement distance. As a result, the sleeve 17 in both possible extreme position (rest and working position) each of the

Tubusinnenwandung 55 fully includes. The tube 53 has a tapered

Fixing portion 57 for anchoring the same firmly in an opening 58 of a watch case 69. At the Tubusinnenwandung 55 is an annular groove 59 for the

Recording of two O-rings 61 is provided. These watertight seal the interior of the housing against the environment. Following the opening 58, a bag-like recess 73 for receiving the crown head 13 is provided.

To fix the crown in the rest position, an approximately V-shaped annular groove 63 is provided at the front end 24 of the sleeve 17. The annular groove 63 serves as a means of attack for a pawl spring 65, which by means of screws 67 on the watch case

is screwed (Fig. 4). The pawl spring 65 engages in the rest position in the annular groove 63 and thereby holds the sleeve 17 in this position. However, if the sleeve 17 something is pulled out of the watch case, pushes the compression spring 31, the crown 13 automatically in the working position.

At the back of the watch case, a recess is provided below the crown 13 in order to be able to grasp the crown edge 52 with a fingertip.

A crown system 1 with an elevator shaft 15 and a crown 13 arranged on the elevator shaft 15 is characterized in that the elevator shaft 15 additionally comprises a displacement element 17, in particular a sleeve. The elevator shaft 15 and the displacement member 17 relative to each other by a certain distance, respectively. a displacement telescopically axially displaceable to the

Kronenkopf 13 of a first housing near, axial displacement position, wholly or partially located within the housing periphery, to move to a second housing distal, axial displacement position and vice versa. In this case, further axial, "housing distant" positions of the control shaft for controlling functions (date correction, pointer position, etc.) can be provided

Displacement element, the shaft is extended by the displacement, so that the crown 13 can be accommodated in a watch case without the movement would have to be changed. In the case of the clock according to the invention, the spring element 31 brings the crown from the locked position into a first operating position. Further

However, positions can be achieved "conventionally" by pulling the crown in. It is also significant that the spring force of the spring 31 is smaller than the resistance established by the locking mechanism (spring latch 65, engaging means 63).

Legend

1 1 crown system

13 crown, crown head

15 elevator shaft

17 sleeve

19 rear part of the (elevator) shaft, extension

20 Front part of the (elevator) shaft

21 Rear guide section

23 Front guide section

24 front end of the sleeve

25 ring heel

27 step between the rear and front guide section

29 bore

31 compression spring

33 closure part

35 pen

37 turns of compression spring

39 tip of the pen 35

41 collar

43 ring heel

45 external thread on the collar

47 hollow cylinder

49 internal thread

50 knurls of the crown

51 annulus

52 edge of the crown

53 tube

55 Tubusinnenwandung

57 tapered attachment section of the tube

58 Opening in the watch case for receiving the crown system

59 ring groove

61 O-rings

63 ring groove

65 pawl spring

67 screws for attaching the pawl spring to the watch case

69 watch case

71 Peripheral of the watch case

73 recess in the watch case

Claims

Watch with a watch case, a clock mechanism housed in the watch case (69) and a radial opening (58) for receiving a

Crown system (1 1), a crown system (1 1) with a shaft (15), in particular an elevator shaft, and a on the shaft (15) arranged crown head (13), wherein the shaft (5) at least one additional

Displacement part (17), on which the crown head (13) is arranged, and the shaft (15) and the displacement part (17) relative to each other by a certain distance (telescopically) are axially displaceable to the crown head (13) from a first close to the housing to move the axial displacement position into a second housing-remote, axial displacement position and vice versa,

characterized,

that the first housing near axial displacement position is the rest position.

Clock according to claim 1, characterized in that the displacement part is a sleeve (17), which is guided axially displaceably on the shaft (15).

Clock according to Claim 2, characterized in that the displacing part (17) has an engagement means (63) which cooperate with a spring element (65) arranged in the watch case (69) or with a spring-biased locking bar for locking the shaft (15) in the rest position can.

Clock according to one of claims 1 to 3, characterized in that between the shaft (15) and the crown head (13), a spring element (31) is provided which the crown head (13) in an extended

Biasing working position.

Clock according to claim 4, characterized in that the rear end of the shaft (15), resp. the extension (19) has an axial bore (29) in which the spring element (31) is received.

6. Clock according to claim 4 or 5, characterized in that the spring element (31) through the crown head (13) or a closure part (33) in the bore (29). is held.

Clock according to one of claims 1 to 6, characterized in that the crown head (13) is designed as a hollow cylinder closed on one side (47), which is the sleeve (17) is inserted.

8. Clock according to one of claims 3 to 7, characterized in that

between a rear portion of the sleeve (17) and the wall of the hollow cylinder (47) an annular space (51) is present.

9. Clock according to one of claims 3 to 8, characterized in that the

Sleeve (17) in a tube (53) which in the opening (58) of the

Watch case is inserted or may be part of the watch case, is guided axially displaceable.

10. Clock according to claim 9, characterized in that the rear part of the tube (53) is received in the rest position of the crown system in the annular space (51).

1. Clock according to one of claims 1 to 10, characterized in that the crown head (13) is preferably provided with knurls (50) and that the rear end of the crown head (13) has a radially projecting annular bead (52). 12. Clock according to one of claims 9 to 1 1, characterized in that the tube (53) is set back a certain distance from the periphery of the watch case (69) in the watch case (69), so that the crown head (13) in the rest position is housed essentially in the watch case (69).

13. Clock according to one of claims 1 to 12, characterized in that on the back of the watch case (69) in the region of the crown head (13) is provided a recess so that at least the edge of the crown head (13) is accessible for the purpose of detecting the crown system ,

14. Clock according to one of claims 1 to 13, characterized in that the crown head (13) in the rest position to at least 50%, preferably at least 60% and more preferably at least 75% of its axial extent in the watch case (69) is added.

15. Clock according to one of claims 1 to 14, characterized in that in the watch case (69) adjoining the opening (58) has a recess (73) for receiving the crown head (13) is provided.