WO2017012948A1 - Method and device for fastening a watchstrap to a wristwatch - Google Patents

Method and device for fastening a watchstrap to a wristwatch Download PDF

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Publication number
WO2017012948A1
WO2017012948A1 PCT/EP2016/066636 EP2016066636W WO2017012948A1 WO 2017012948 A1 WO2017012948 A1 WO 2017012948A1 EP 2016066636 W EP2016066636 W EP 2016066636W WO 2017012948 A1 WO2017012948 A1 WO 2017012948A1
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WO
WIPO (PCT)
Prior art keywords
watchstrap
mounting
mounting hole
spring bar
recess
Prior art date
Application number
PCT/EP2016/066636
Other languages
French (fr)
Inventor
Arnaud Duval
Original Assignee
Sevenfriday AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sevenfriday AG filed Critical Sevenfriday AG
Publication of WO2017012948A1 publication Critical patent/WO2017012948A1/en

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/14—Suspending devices, supports or stands for time-pieces insofar as they form part of the case
    • G04B37/1486—Arrangements for fixing to a bracelet
    • G04B37/1493—Arrangements for fixing to a bracelet by means of a feather spring (Barette á ressort)

Definitions

  • the present invention relates to the technology of wristwatches. It refers to a method for fastening a watchstrap to a wristwatch and/or removing said fastened watchstrap from said wristwatch . It further refers to a wristwatch for conducting said method .
  • Wristwatches with watchbands are well-known in the art.
  • the watchband is releasable fastened to the watchcase of the wristwatch in order to be replaced when the watchband breaks down or the owner of the wristwatch wishes to change the design .
  • the watchband is fastened by means of spring bars, which have to be compressed with special tools to remove the watchband, as for example shown in document US 4,375,259.
  • This kind of fastening has several disadvantages:
  • Document EP 1 241 540 A1 discloses a device for fixing a watch bracelet onto a watch casing.
  • the casing has a hinge forming part of the casing in which slides two pivots under the action of a spring tending to keep them apart so that the external ends of the pivots emerge from the lateral faces of the hinge.
  • a fixing part is designed to be fitted at the end of a bracelet having two feet defining a space into which the hinge fits.
  • Each of the feet has an axial slot extended by a passage ending in the space between the feet and having a diameter corresponding to that of the pivot ends.
  • the slot is connected to the two external lateral faces of the feet by a hole of smaller diameter than the slot.
  • Push studs, slid ing in the slot have an inner end whose diameter corresponds to that of the passage.
  • Document WO 93/1 0486 A1 discloses a wristwatch , which has a housing and stops shaped on the housing .
  • the watch has a strap with connecting pieces for releasable link- ing the strap to the housing of the watch.
  • the connecting piece has two pins movably arranged at the ends of a sleeve that project beyond the respective ends of the sleeve.
  • An opening for receiving an end of the connecting pin is provided in the watch stop.
  • the wristwatch has releasing means with one or two actuating members. The actuating members release the strap against the force of a spring on the pins.
  • the actuating mem- ber has a head with a bolt and the stop has a receptacle with a through bore that ends in the opening .
  • the bolt extends through the through bore.
  • a watchband -securing device including a variable length rod extending between opposed watch case horns.
  • One of the horns is pivotally connected to the watchcase and one end of the rod is connected to the pivotable horn. This enables the rod to pivot laterally between open and closed positions away from and towards the watchcase, respectively. After a watchband is threaded on the rod in the open position, the rod is rotated towards the closed position until the opposite end of the rod engages the opposed horn.
  • a camming surface is provided between the rod and the opposed horn that causes the rod to be shortened against a spring force as it engages the opposed horn so that it can become aligned with a bore hole in the opposed horn and engage the borehole by the spring force extending the rod length.
  • a manual push piece is provided to enable manual shortening of the rod so that it clears the borehole and releases the rod for pivotal motion towards the open position.
  • a method for fastening a watchstrap to a wristwatch and/or removing said fastened watchstrap from said wristwatch comprises the steps of: a. providing a watchstrap ( having two end sections, which are each equipped or connectable with a transverse spring bar, which project beyond said watchstrap on both sides with a respective mounting pin; b. providing a wristwatch comprising a watchcase with two opposite recesses for receiving said end sections of said watchstrap, whereby each recess has a first mounting hole for receiving one of said mounting pins of said spring bar, on one side, and a second mounting hole connected with a side slot for guiding and receiving the other of said mounting pins of said spring bar, on the opposite side; c.
  • a specially designed pusher is provided at or incorporated into said watchcase for pushing said second mounting pin out of said second mounting hole in a convenient manner, and said pusher is actuated against the force of a spring , when said watchstrap is removed .
  • said recesses and side slots open to the backside of said watchcase, and the second of said mounting pins of said spring bar is laterally moved along said side slot from the backside of said watchcase towards said second mounting hole, when said watchstrap is fastened .
  • a wristwatch normally comprises a watchcase with two opposite recesses for receiving corresponding end sections of a watchstrap, whereby each recess has a first mounting hole for receiving a first of two mounting pins of a spring bar extending through said end section of said watchstrap, on one side, and a second mounting hole connected with a side slot for guiding and receiving the second of said mounting pins of said spring bar, on the opposite side.
  • the second mounting hole can be part a pushing means ( pusher), which enables to push said second mounting pin out of said second mounting hole into the connected side slot.
  • the pushing means may comprise a guide bushing, which is mounted in said watchcase opening into the respective recess and acting as said second mounting hole, and a bolt may be provided and axially guided in said guide bushing for pushing said second mounting pin out of said guide bushing against the force of a spring .
  • said bolt may be threaded and connected with a nut.
  • Fig. 1 shows in a perspective view from above a wristwatch according to an embodiment of the invention with a mounted watchstrap;
  • Fig. 2 is a top view of the wristwatch of Fig . 1 ;
  • Fig. 3 shows in a perspective view from below the wristwatch of Fig. 1 ;
  • Fig. 4 is a side view of the wristwatch of Fig. 1 ;
  • Fig. 5 shows in three steps (a ) to (c) the mounting process of the watchstrap for a wristwatch according to Fig . 1 ;
  • Fig. 6 is a bottom view of the watchcase of the wristwatch of Fig . 1 showing the mounting mechanism for the watchband ;
  • Fig. 7 is a detailed exploded view of the pushing mechanism used at the watchcase of Fig. 6;
  • Fig. 8 shows in detail the arrangement of the pushing mechanism of Fig. 7 within the watchcase.
  • Figs.1 to 4 show different views of a wristwatch 1 0 with a mounted watchstrap 1 2 (Fig. 4), which comprises two watchstrap sections 1 2a and 1 2b.
  • a buckle being necessary to connect the free ends of watchstrap sections 1 2a and 1 2b is not shown in the drawings.
  • Wristwatch 1 0 has a watchcase 1 1 with a movement arranged therein . Actual time can be read through a watch glass 1 1 a on top of watchcase 1 1 .
  • Watchstrap sections 1 2a and 1 2b are releasable connected to watchcase 1 1 on two opposite sides of the watchcase by means of mounting mechanisms 1 3a and 1 3 b.
  • Mounting mechanisms 1 3a and 1 3 b are designed to allow a quick and easy mounting and demounting of watchstrap sections 1 2a and 1 2b.
  • Three steps of the mounting process of a watchstrap section (in this case watchstrap section 1 2b) are shown in Fig. 5(a) to 5(c).
  • Each watchstrap section 1 2a, b has and end section 1 7a, 1 7b, which is equipped with a transverse spring bar ( 1 8b in Fig. 5 ).
  • Spring bar 1 8b (as well as spring bar 1 8a ) projects beyond watchstrap 1 2b on both sides of the watchstrap with a respective mounting pin .
  • spring bar 1 8b can be compressed in longitudinal direction so that the mounting pins can move back (against a spring force) and forth (driven by spring force) in longitudinal direction.
  • watchcase 1 1 comprises on opposite sides, where watchstrap sections 1 2a and 1 2b are mounted , a respective recess 1 5a, 1 5b, which opens to the side and back of watchcase 1 1 .
  • Each recess 1 5a, 1 5b has on one side a first mounting hole 1 6a, 1 6b for receiving one of said mounting pins of spring bar 1 8a and 1 8b, respectively.
  • a second mounting hole ( 27 in Fig. 8) is provided on the opposite side of first mounting hole 1 6a, 1 6b in each recess 1 5a, 1 5b.
  • Each second mounting hole is arranged adjacent to or interconnected with a side slot 1 9a, 1 9b for guiding and receiving the other of said mounting pins of spring bar 1 8a, 1 8b.
  • the first mounting hole 1 6a may have at least partially a larger diameter then the second mounting hole 1 6b, such that the spring bar 1 8a, 1 8b can be tilted sideways when inserting or removing the spring bar 1 8a, 1 8b.
  • a pushing means 1 4, 20a, 20b, 2 1 , 22, 23 is provided at watchcase 1 1 for pushing said second mounting pin out of said second mounting hole 27.
  • This pushing means which is shown in detail in Figs. 6 to 8, comprises a pusher 20a, 20b, which can be actuated against the force of a spring 23 , when a watchstrap section 1 2a, 1 2b is to be removed, whereby pushing means 1 4, 20a, 20b, 2 1 , 22 , 23 enables to push said second mounting pin out of said second mounting hole 27 e.g. into the connected side slot 1 9a, 1 9b.
  • Second mounting hole 27 is part of said pushing means: Said pushing means 1 4, 20a, 20b, 2 1 , 22 , 23 , comprises a guide bushing 22, which is mounted in watchcase 1 1 opening into the respective recess 1 5a, 1 5b and acting as said second mounting hole 27 (see Fig. 8).
  • a bolt 2 1 is provided and axially guided in guide bushing 22 for pushing said second mounting pin out of guide bushing 22 against the force of a spring 23.
  • Bolt 2 1 is a threaded bolt and is connected through an opening in guide bushing 22 with a nut 24, which is accessible from outside to actuate pusher 20a, 20b.
  • Spring 23 is arranged between guide bushing 22 and nut 24.
  • Pusher 20a (Fig. 7) and 20b ( Fig. 5 ) are identical in their design. They can be easily actuated by a suitable tool having a tip, e.g. a pencil, ball pen , or the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

The invention relates to a method for fastening a watchstrap (12b) to a wristwatch and/or removing said fastened watchstrap (12b) from said wristwatch. The inventive method comprises the steps of: a. providing a watchstrap (12b) having two end sections (17b), which are each equipped with a transverse spring bar (18b), which project beyond said watchstrap (12b) on both sides with a respective mounting pin; b. providing a wristwatch comprising a watchcase (11) with two opposite recesses (15a,b) for receiving said end sections (17b) of said watchstrap (12b), whereby each recess (15a,b) has a first mounting hole (16b) for receiving one of said mounting pins of said spring bar (18b), on one side, and a second mounting hole connected with a side slot (19b) for guiding and receiving the other of said mounting pins of said spring bar (18b), on the opposite side; c. fastening said watchstrap (12b) by putting an end section (17b) of said watchstrap (12a, b) into the respective recess (15b) of said watchcase (11) and at the same time inserting a first of said mounting pins of said spring bar (18b) axially into the first mounting hole (16b) of said recess, and by then moving the second of said mounting pins of said spring bar (18b) laterally along said side slot (19b) towards said second mounting hole until it latches into said second mounting hole; and/or d. removing said watchstrap (12b) by pushing said second mounting pin of said spring bar (18b) out of said second mounting hole and laterally re- moving it from said recess (15b) along said side slot (19b), and by taking the respective end section (17b) of said watchstrap (12b) out of said recess (15b) and at the same time removing the first mounting pin of said spring bar (18b) from the first mounting hole (16b) of said recess.

Description

METHOD AND DEVICE FOR FASTENING A WATCHSTRAP TO A WRISTWATCH
BACKGROUND OF THE INVENTION
The present invention relates to the technology of wristwatches. It refers to a method for fastening a watchstrap to a wristwatch and/or removing said fastened watchstrap from said wristwatch . It further refers to a wristwatch for conducting said method .
PRIOR ART
Wristwatches with watchbands are well-known in the art. In most cases, the watchband is releasable fastened to the watchcase of the wristwatch in order to be replaced when the watchband breaks down or the owner of the wristwatch wishes to change the design .
Usually, the watchband is fastened by means of spring bars, which have to be compressed with special tools to remove the watchband, as for example shown in document US 4,375,259. This kind of fastening has several disadvantages:
• To remove the watchband you need those special tools, which are not at hand when needed;
• the compression of the spring bars with those special tools is a cumbersome task, which needs some intuition and manual skills; and • the fastening of the watchband, although possible without special tools, is also non -trivial , as the compressed spring bar must be inserted with its two end pins into the respective not easily accessible holes at the watchcase.
Document EP 1 241 540 A1 discloses a device for fixing a watch bracelet onto a watch casing. The casing has a hinge forming part of the casing in which slides two pivots under the action of a spring tending to keep them apart so that the external ends of the pivots emerge from the lateral faces of the hinge. A fixing part is designed to be fitted at the end of a bracelet having two feet defining a space into which the hinge fits. Each of the feet has an axial slot extended by a passage ending in the space between the feet and having a diameter corresponding to that of the pivot ends. The slot is connected to the two external lateral faces of the feet by a hole of smaller diameter than the slot. Push studs, slid ing in the slot, have an inner end whose diameter corresponds to that of the passage.
Document WO 93/1 0486 A1 discloses a wristwatch , which has a housing and stops shaped on the housing . The watch has a strap with connecting pieces for releasable link- ing the strap to the housing of the watch. The connecting piece has two pins movably arranged at the ends of a sleeve that project beyond the respective ends of the sleeve. An opening for receiving an end of the connecting pin is provided in the watch stop. The wristwatch has releasing means with one or two actuating members. The actuating members release the strap against the force of a spring on the pins. The actuating mem- ber has a head with a bolt and the stop has a receptacle with a through bore that ends in the opening . The bolt extends through the through bore.
Document US 5,850,675 discloses a watchband -securing device including a variable length rod extending between opposed watch case horns. One of the horns is pivotally connected to the watchcase and one end of the rod is connected to the pivotable horn. This enables the rod to pivot laterally between open and closed positions away from and towards the watchcase, respectively. After a watchband is threaded on the rod in the open position, the rod is rotated towards the closed position until the opposite end of the rod engages the opposed horn. A camming surface is provided between the rod and the opposed horn that causes the rod to be shortened against a spring force as it engages the opposed horn so that it can become aligned with a bore hole in the opposed horn and engage the borehole by the spring force extending the rod length. To release the rod from the opposed horn, a manual push piece is provided to enable manual shortening of the rod so that it clears the borehole and releases the rod for pivotal motion towards the open position.
Although the last document produces some relief with regard to the ease of operation of the fastening mechanism. However, the pivoting mechanism used is complicated and prone to failures of function.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a method for fastening a watchstrap to a wrist- watch and/or removing said fastened watchstrap from said wristwatch, which is on one hand less complicated than prior art solution and on the other hand provides ease of operation when executed frequently. Furthermore a wristwatch is provided for conducting said method.
A method according to the invention for fastening a watchstrap to a wristwatch and/or removing said fastened watchstrap from said wristwatch comprises the steps of: a. providing a watchstrap ( having two end sections, which are each equipped or connectable with a transverse spring bar, which project beyond said watchstrap on both sides with a respective mounting pin; b. providing a wristwatch comprising a watchcase with two opposite recesses for receiving said end sections of said watchstrap, whereby each recess has a first mounting hole for receiving one of said mounting pins of said spring bar, on one side, and a second mounting hole connected with a side slot for guiding and receiving the other of said mounting pins of said spring bar, on the opposite side; c. fastening said watchstrap by putting an end section of said watchstrap into the respective recess of said watchcase and at the same time inserting a first of said mounting pins of said spring bar axially into the first mounting hole of said recess, and by then moving the second of said mounting pins of said spring bar laterally along said side slot towards said second mounting hole until it latches into said second mounting hole; and/or d. removing said watchstrap by pushing said second mounting pin of said spring bar out of said second mounting hole and laterally removing it from said recess along said side slot, and by taking the respective end section of said watchstrap out of said recess and at the same time removing the first mounting pin of said spring bar from the first mounting hole of said recess.
According to an embodiment of the invention a specially designed pusher is provided at or incorporated into said watchcase for pushing said second mounting pin out of said second mounting hole in a convenient manner, and said pusher is actuated against the force of a spring , when said watchstrap is removed . According to embodiment of the invention said recesses and side slots open to the backside of said watchcase, and the second of said mounting pins of said spring bar is laterally moved along said side slot from the backside of said watchcase towards said second mounting hole, when said watchstrap is fastened . A wristwatch according to the invention normally comprises a watchcase with two opposite recesses for receiving corresponding end sections of a watchstrap, whereby each recess has a first mounting hole for receiving a first of two mounting pins of a spring bar extending through said end section of said watchstrap, on one side, and a second mounting hole connected with a side slot for guiding and receiving the second of said mounting pins of said spring bar, on the opposite side.
The second mounting hole can be part a pushing means ( pusher), which enables to push said second mounting pin out of said second mounting hole into the connected side slot. The pushing means may comprise a guide bushing, which is mounted in said watchcase opening into the respective recess and acting as said second mounting hole, and a bolt may be provided and axially guided in said guide bushing for pushing said second mounting pin out of said guide bushing against the force of a spring . Furthermore, said bolt may be threaded and connected with a nut.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now to be explained more closely by means of different em- bodiments and with reference to the attached drawings.
Fig. 1 shows in a perspective view from above a wristwatch according to an embodiment of the invention with a mounted watchstrap; Fig. 2 is a top view of the wristwatch of Fig . 1 ;
Fig. 3 shows in a perspective view from below the wristwatch of Fig. 1 ;
Fig. 4 is a side view of the wristwatch of Fig. 1 ;
Fig. 5 shows in three steps (a ) to (c) the mounting process of the watchstrap for a wristwatch according to Fig . 1 ;
Fig. 6 is a bottom view of the watchcase of the wristwatch of Fig . 1 showing the mounting mechanism for the watchband ;
Fig. 7 is a detailed exploded view of the pushing mechanism used at the watchcase of Fig. 6; and
Fig. 8 shows in detail the arrangement of the pushing mechanism of Fig. 7 within the watchcase.
DETAILED DESCRIPTION OF DIFFERENT EMBODIMENTS OF THE INVENTION
Figs.1 to 4 show different views of a wristwatch 1 0 with a mounted watchstrap 1 2 (Fig. 4), which comprises two watchstrap sections 1 2a and 1 2b. A buckle being necessary to connect the free ends of watchstrap sections 1 2a and 1 2b is not shown in the drawings. Wristwatch 1 0 has a watchcase 1 1 with a movement arranged therein . Actual time can be read through a watch glass 1 1 a on top of watchcase 1 1 . Watchstrap sections 1 2a and 1 2b are releasable connected to watchcase 1 1 on two opposite sides of the watchcase by means of mounting mechanisms 1 3a and 1 3 b. Mounting mechanisms 1 3a and 1 3 b are designed to allow a quick and easy mounting and demounting of watchstrap sections 1 2a and 1 2b. Three steps of the mounting process of a watchstrap section ( in this case watchstrap section 1 2b) are shown in Fig. 5(a) to 5(c). Each watchstrap section 1 2a, b has and end section 1 7a, 1 7b, which is equipped with a transverse spring bar ( 1 8b in Fig. 5 ). Spring bar 1 8b (as well as spring bar 1 8a ) projects beyond watchstrap 1 2b on both sides of the watchstrap with a respective mounting pin . Due to an integrated telescopic spring mechanism, which is well-known in the art (see for example US 2,382 ,249 A) , spring bar 1 8b can be compressed in longitudinal direction so that the mounting pins can move back (against a spring force) and forth (driven by spring force) in longitudinal direction.
As can be seen in Fig. 5(a), watchcase 1 1 comprises on opposite sides, where watchstrap sections 1 2a and 1 2b are mounted , a respective recess 1 5a, 1 5b, which opens to the side and back of watchcase 1 1 . Each recess 1 5a, 1 5b has on one side a first mounting hole 1 6a, 1 6b for receiving one of said mounting pins of spring bar 1 8a and 1 8b, respectively. A second mounting hole ( 27 in Fig. 8) is provided on the opposite side of first mounting hole 1 6a, 1 6b in each recess 1 5a, 1 5b. Each second mounting hole is arranged adjacent to or interconnected with a side slot 1 9a, 1 9b for guiding and receiving the other of said mounting pins of spring bar 1 8a, 1 8b. The first mounting hole 1 6a may have at least partially a larger diameter then the second mounting hole 1 6b, such that the spring bar 1 8a, 1 8b can be tilted sideways when inserting or removing the spring bar 1 8a, 1 8b.
For fastening watchstrap 1 2b (as shown in Fig. 5 ) end section 1 7b) of said watchstrap is put into the respective recess 1 5b of watchcase 1 1 (Fig. 5(a)). At the same time or shortly after the respective mounting pin of spring bar 1 8b) is axially into first mounting hole 1 6b of said recess (Fig. 5(b)). Finally, the second (opposite) of said mounting pins of spring bar 1 8b is laterally moved along respective side slot 1 9b towards second mounting hole 27 until it latches into said second mounting hole ( Fig. 5(c)).
For removing a watchstrap section 1 2a, 1 2b the second mounting pin of spring bar 1 8a, 1 8b is pushed out of second mounting hole 27 and then laterally removed from the respective recess along the respective side slot. Then, the respective end section of said watchstrap section can be taken out of said recess at the same time removing the first mounting pin of spring bar 1 8a, 1 8b from the first mounting hole of said recess. The steps of this removing process are thus inverse to those shown in Fig. 5.
A pushing means 1 4, 20a, 20b, 2 1 , 22, 23 , is provided at watchcase 1 1 for pushing said second mounting pin out of said second mounting hole 27. This pushing means, which is shown in detail in Figs. 6 to 8, comprises a pusher 20a, 20b, which can be actuated against the force of a spring 23 , when a watchstrap section 1 2a, 1 2b is to be removed, whereby pushing means 1 4, 20a, 20b, 2 1 , 22 , 23 enables to push said second mounting pin out of said second mounting hole 27 e.g. into the connected side slot 1 9a, 1 9b.
Second mounting hole 27 is part of said pushing means: Said pushing means 1 4, 20a, 20b, 2 1 , 22 , 23 , comprises a guide bushing 22, which is mounted in watchcase 1 1 opening into the respective recess 1 5a, 1 5b and acting as said second mounting hole 27 (see Fig. 8). A bolt 2 1 is provided and axially guided in guide bushing 22 for pushing said second mounting pin out of guide bushing 22 against the force of a spring 23. Bolt 2 1 is a threaded bolt and is connected through an opening in guide bushing 22 with a nut 24, which is accessible from outside to actuate pusher 20a, 20b. Spring 23 is arranged between guide bushing 22 and nut 24. Guide bushing 22 of the pusher 20a sits in a bore 26 ( Fig. 8), which connects recess 1 5a with another external recess 25 for receiving pusher 20a. Pusher 20a (Fig. 7) and 20b ( Fig. 5 ) are identical in their design. They can be easily actuated by a suitable tool having a tip, e.g. a pencil, ball pen , or the like.
LIST OF REFERENCE NUMERALS
10 wristwatch
11 watchcase
11 a watch glass
12a,b watchstrap section
13a,b mounting mechanism
14a,b projection
15a, b recess
16a, b (mounting) hole
17a,b end section
18a, b spring bar
19a,b side slot
20a, b pusher
21 bolt
22 guide bushing
23 spring
24 nut
25 recess
26 bore
27 (mounting) hole

Claims

1. Method for fastening a watchstrap ( 12a, b) to a wristwatch (10) and /or removing said fastened watchstrap (12a,b) from said wristwatch (10), said method comprising the steps of: a. providing a watchstrap (12a,b) having two end sections (17a,b), which are each equipped with a transverse spring bar ( 18a, b), which project beyond said watchstrap (12a,b) on both sides with a respective mounting pin; b. providing a wristwatch (10) comprising a watchcase (11) with two opposite recesses (15a,b) for receiving said end sections (17a,b) of said watchstrap (12a,b), whereby each recess (15a,b) has a first mounting hole (16a,b) for receiving one of said mounting pins of said spring bar (18a,b), on one side, and a second mounting hole (27) arranged adjacent to or connected with a side slot ( 19a, b) for guiding and receiving the other of said mounting pins of said spring bar (18a,b), on the opposite side; c. fastening said watchstrap (12a,b) by putting an end section (17a,b) of said watchstrap ( 12a, b) into the respective recess ( 15a, b) of said watch- case (11) and at the same time inserting a first of said mounting pins of said spring bar ( 18a, b) axially into the first mounting hole ( 16a, b) of said recess, and by then moving the second of said mounting pins of said spring bar ( 18a, b) laterally along said side slot ( 19a, b) towards said sec- ond mounting hole (27) until it latches into said second mounting hole (27); and/or d. removing said watchstrap (12a,b) by pushing said second mounting pin of said spring bar ( 18a, b) out of said second mounting hole (27) and laterally removing it from said recess (15a,b) along said side slot (19a,b), and by taking the respective end section (17a,b) of said watchstrap ( 12a, b) out of said recess ( 15a, b) and at the same time removing the first mounting pin of said spring bar (18a,b) from the first mounting hole ( 16a, b) of said recess.
Method as claimed in Claim 1 , characterized in that said a pusher (20a, b) is provided at said watchcase ( 11 ) for pushing said second mounting pin out of said second mounting hole (27), and that said pusher (20a, b) is actuated against the force of a spring (23), when said watchstrap ( 12a, b) is removed.
Method as claimed in Claim 1, characterized in that said recesses (15a,b) and side slots ( 19a, b) open to the backside of said watchcase (11), and that the second of said mounting pins of said spring bar (18a,b) is laterally moved along said side slot ( 19a, b) from the backside of said watchcase towards said second mounting hole (27), when said watchstrap ( 12a, b) is fastened.
Wristwatch for conducting the method according to one of the Claims 1 to 3, comprising a watchcase (11) with two opposite recesses (15a,b) for receiving end sections ( 17a, b) of a watchstrap ( 12a, b), whereby each recess ( 15a, b) has a first mounting hole (16a,b) for receiving a first of two mounting pins of a spring bar (18a,b) extending through said end section of said watchstrap (12a,b), on one side, and a second mounting hole (27) arranged adjacent to or interconnected with a side slot ( 19a, b) for guiding and receiving the second of said mounting pins of said spring bar ( 18a, b), on the opposite side.
5. Wristwatch as claimed in Claim 4, characterized in that said second mounting hole (27) is part of a pushing means (20a, b; 21, 22, 23, 14), which enables to push said second mounting pin out of said second mounting hole (27) into the connected side slot ( 19a, b).
6. Wristwatch as claimed in Claim 5, characterized in that said pushing means (20a, b; 21 , 22, 23, 14) comprises a guide bushing (22), which is mounted in said watchcase (11) opening into the respective recess (15a, b) and acting as said second mounting hole (27), and that a bolt (21 ) is provided and axially guided in said guide bushing (22) for pushing said second mounting pin out of said guide bushing (22) against the force of a spring (23).
7. Wristwatch as claimed in Claim 6, characterized in that said bolt (21 ) is threaded and connected with a nut (24).
PCT/EP2016/066636 2015-07-17 2016-07-13 Method and device for fastening a watchstrap to a wristwatch WO2017012948A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10502015 2015-07-17
CH01050/15 2015-07-17

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2382249A (en) 1943-08-14 1945-08-14 Megar David Spring bar
US4375259A (en) 1981-08-07 1983-03-01 Timex Corporation Tool kit for watch strap replacement
DE9203248U1 (en) * 1991-11-20 1992-08-13 Hagmann, Eberhard, 7531 Oelbronn-Duerrn, De
US5850675A (en) 1996-03-18 1998-12-22 Bourquin; Francis Device for detachably fixing a watchband to a watch case
FR2766587A1 (en) * 1997-07-23 1999-01-29 Meca Control Spring biased bar for retaining wrist watch strap
EP1220060A1 (en) * 2000-12-22 2002-07-03 Vaucher Outillage Horloger Device for fastening a flexible strap, in particular to a watch case, watch case and method for fastening such a strap
EP1241540A1 (en) 2001-03-12 2002-09-18 Conseils et Manufactures VLG SA Device for fastening a bracelet to a watch-case

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2382249A (en) 1943-08-14 1945-08-14 Megar David Spring bar
US4375259A (en) 1981-08-07 1983-03-01 Timex Corporation Tool kit for watch strap replacement
DE9203248U1 (en) * 1991-11-20 1992-08-13 Hagmann, Eberhard, 7531 Oelbronn-Duerrn, De
WO1993010486A1 (en) 1991-11-20 1993-05-27 Eberhard Hagmann Wristwatch
US5850675A (en) 1996-03-18 1998-12-22 Bourquin; Francis Device for detachably fixing a watchband to a watch case
FR2766587A1 (en) * 1997-07-23 1999-01-29 Meca Control Spring biased bar for retaining wrist watch strap
EP1220060A1 (en) * 2000-12-22 2002-07-03 Vaucher Outillage Horloger Device for fastening a flexible strap, in particular to a watch case, watch case and method for fastening such a strap
EP1241540A1 (en) 2001-03-12 2002-09-18 Conseils et Manufactures VLG SA Device for fastening a bracelet to a watch-case

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