JPH0651008B2 - Fixing device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a fixing device for mounting a watch band on a casing of a wristwatch, which comprises a lateral pin forming a pivot axis to which the watch band is hinged. The present invention relates to a type in which the lateral pin is capable of penetrating and guiding through lateral holes which are provided at the end of the connecting piece of the casing and the watch band and are coaxial with each other and transverse to the longitudinal direction of the band.

[Prior Art] In the fixing device of the above type, it is known that the lateral pin is configured as a spring pin, and the end portion of the spring pin is configured in a telescope type and is compressible against a spring force. . As a result, the length of the lateral pin can be reduced, and the lateral pin can be removed from the lateral hole. It is difficult to assemble and disassemble the watch band due to the small structural size of the horizontal pin. Due to the watchband on the lateral pin, the force load is likely to cause unintended separation of the lateral pin.

Another fastening device of the type mentioned at the outset comprises a transverse pin which can be screwed with its threaded end into a similarly threaded transverse hole of the connecting piece. The problem here is that the screwed-in lateral pin can again very easily disengage on the basis of the force applied by the watch band and the resulting vibration.

[Problems to be Solved by the Invention] An object of the present invention is to find a fixing device of the type described at the beginning, which can be easily assembled and disassembled, and has safety measures taken into consideration so as not to be separated automatically. is there.

[Means for Solving the Problems] In the means for solving the above-mentioned problems of the present invention, the connecting piece has an opening substantially orthogonal to the lateral hole, and the locking piece can be inserted into this opening. Moreover, the connecting piece and the locking piece can be joined by friction, and the locking piece extends laterally with respect to the longitudinal direction of the band through the locking notch formed in the horizontal pin. It is possible to combine them.

[Advantages of the Invention] Since the force exerted on the horizontal pin by the watch band does not act on the structural member for securing the horizontal pin, that is, the locking piece, high reliability is achieved to prevent unintended separation of the watch band. For example, the locking piece can be frictionally coupled to the connection piece by the outer peripheral surface of the locking piece springing radially outwardly against the inner surface of the opening of the connection piece. As a result, the locking piece is secured by the insertion device.

The locking piece may have an arm, and the arm can be inserted into the locking notch of the lateral pin at a substantially right angle. In this case, in a simple configuration, the locking notch is provided on the circumferential surface of the lateral pin. It is an annular groove provided perpendicular to the axis of the.

Symmetrical locking of the lateral pin is achieved when the locking piece has two fork-shaped arms which can be inserted into the annular groove so as to grab the lateral pin around it. .

In order to additionally frictionally secure the locking piece in the opening of the connecting piece, the arm may be a spring arm, the spring arm being elastically lockable in the locking notch.

This fixing is further enhanced by the fact that the spring arm has a recess on the side facing the lateral pin which is approximately the contour of the lateral pin in the region of the locking notch, which recess can be locked on the lateral pin. be able to.

In order to prevent dirt from entering the opening, it is advantageous if the opening can be closed on the front side by means of the closure of the locking piece.
The closure may additionally have a decoration. This does not require special equipment to be able to decorate the watch.

For easy disassembly, the locking piece has a grip on the front side,
In this case, the grip portion can be formed in a simple manner by an additional portion protruding on the front side.

An annular groove formed on the peripheral surface of the appendage perpendicular to the axis of the appendage allows for easy gripping by hand or tool, so that the retaining piece exerts a good holding force for disassembly. . This likewise avoids scratches or damage to the watch when the watch band is removed.

In a simple design, the locking piece consists of a sleeve having the contour of the opening of the connecting piece, the sleeve being engageable in the locking recess in the extent of the wall.

Both halves of the sleeve separated by a slit, with the sleeve penetrating laterally and having one slit open on the back side, the width of the slit being approximately equal to the width of the lateral pin in the area of the locking notch Form both spring arms of the locking piece.

With a good construction, the connecting piece protrudes from the center of the free end of the watch band into the receiving groove extending in the longitudinal direction of the band, and the lateral pins protrude from both sides of the connecting piece into the lateral hole of the watch band. You can stay.

In this case, the lateral pin consists of two identical lateral pin halves, which project symmetrically into one another into the lateral bore of the connecting piece, each having one locking notch, It is possible that the locking piece can be inserted into the locking notch.

Furthermore, if the sleeve can be engaged in the locking notches of the respective lateral pin halves in the area of the respective wall, the two lateral pin halves are
It is fixed by two fixing members.

If the lateral pin has a substantially rectangular cross section at the end projecting from the connecting piece and at the same time the part projecting into the lateral hole of the connecting piece has a circular cross section, the lateral pin is a lateral hole of the connecting piece. You can turn inside. However, the lateral pins are aligned with their position relative to the watch band unchanged.

The free end of the lateral pin on the side opposite to the connecting piece has a radially enlarged part to prevent dirt from entering the lateral hole of the watch band and to protect the watch band in the range of the lateral hole. It

In this case, it is advantageous if the radial dimension of the enlarged part is larger than the diameter of the lateral hole of the watch band. At the same time, the enlargement may be embellished, so that no additional device is needed to apply the embellishment.

[Embodiment] The fixing device for attaching the watch band 1 to the casing 2 of the wristwatch shown in the drawing includes the connecting piece 3 which is formed integrally with the casing 2 so as to face each other and protrude from the casing 2, and the connecting piece is a watch. It projects into the receiving groove 4 at the free end of the band 1.

The width of the receiving groove 4 is approximately equal to the width of the connecting piece 3, and the depth of the receiving groove 4 is approximately equal to the dimension of the connecting piece 3 protruding from the casing.

The lateral hole of the watch band 1 and the lateral hole 5 of the connecting piece 3 are arranged coaxially with each other and are formed so as to extend in the lateral direction with respect to the longitudinal direction of the band. In order to pivotally secure the watch band 1, which is preferably embodied as a leather watch band, to the housing 2, lateral pins lead through the lateral holes of the watch band and the connecting piece.

As can be seen in FIG. 2, the lateral pin consists of two equal lateral pin halves 6. The part of the lateral pin half which is inserted into the lateral hole 5 by means of a sliding fit is constructed cylindrically and the end 7 protruding from the connecting piece 3 has a relatively large, substantially rectangular cross section. ing. The end of the lateral pin half 6 which is remote from the connection piece has a radial expansion 8 which is decorative and whose radial dimension is that of the watch band 1. Larger than the diameter of the lateral hole.

The end of the lateral pin half 6 on the side of the connecting piece 3 is formed in a hemispherical shape so that it can be easily inserted into the lateral hole of the timepiece band 1.

Furthermore, in the region of this end, an annular groove 9 is formed on the cylindrical peripheral surface of the lateral pin half 6 which is perpendicular to the axis of the lateral pin half, which forms a locking notch.

An opening 10 with a cylindrical cross section is formed in the connecting piece 3 which intersects the transverse hole 5 at right angles to it. The diameter of this opening is approximately equal to the distance between the respective outer walls forming the two annular grooves 9. A locking piece 11 can be inserted into the opening 10 from the front side, and the locking piece has a sleeve 15 having an outer diameter equal to the inner diameter of the opening 10.

The sleeve 15 is closed on the front side by a closure 12, which has a decoration. The closure 12 comprises a projecting appendage 13 which is used as a gripping piece, the appendage being formed by a stepped diameter reduction in the end region of the sleeve 15. In the assembled state, this additional part 13 which is present in the opening 10 has a groove 14 on the cylindrical surface which is perpendicular to the axis of the additional part, to which a hook-shaped tool is engaged for disassembly. The locking piece 11 can be pulled out from the opening 10.

The sleeve 15 of the locking piece 11 has a slit 16 penetrating in the lateral direction, and the slit is the closing member 12 of the sleeve 15.
It is open on the side opposite.

The width of the slit 16 is slightly smaller than the diameter of the groove bottom of the annular groove 9, and the wall thickness of the sleeve 15 is substantially equal to the width of the annular groove 9. The slit 16 has a recess 17 at the slit wall, which recess is located in the area of the annular groove 9 when the locking piece 11 is assembled. The recess 17 has a contour corresponding to the contour of the bottom of the annular groove 9. When the locking piece 11 is inserted into the opening 10, the lateral pin half 6 which has already passed through the lateral hole of the watch band 1 and is introduced into the lateral hole 5, the wall of the slit 16 to the annular groove 9. Sleeve 15 relatively to engage
It is made to plunge into the slit 16 of. During this insertion, the slit 16 easily elastically expands until the lateral pin half 6 is locked in the recess 17 in the assembled position. Therefore, the locking piece 11 is held in the opening 10 by the form connection and friction.

Since the wall of the slit 16 of the sleeve 15 contacts the wall of the annular groove 9, the lateral pin half 16 is prevented from being separated from the lateral hole 5.

[Brief description of drawings]

FIG. 1 is a plan view of a wrist watch provided with a fixing device for a watch band, and FIG. 2 is an exploded perspective view of the fixing device of FIG. 1 ... Watch band, 2 ... Casing, 3 ... Connection piece,
4 ... Receiving groove, 5 ... Horizontal hole, 6 ... Half of horizontal pin, 7 ...
... end, 8 ... enlarged part, 9 ... annular groove, 10 ... opening, 11 ... locking piece, 12 ... closing part, 13 ... adding part, 14 ... groove, 15 ... sleeve, 16 ... slit, 17 ... recess

Claims (20)

[Claims] 1. A fixing device for attaching a watch band to a casing of a wristwatch, which comprises a lateral pin forming a pivot axis to which the watch band is hinged, the connecting piece of the casing and the end of the watch band. Of the type in which the lateral pin can be guided by penetrating through lateral holes that are provided coaxially with each other and are lateral to the longitudinal direction of the band, the connecting piece (3) and the lateral hole (5). A substantially orthogonal opening (10) is provided so that the locking piece (11) can be inserted into the opening, and the connecting piece and the locking piece can be frictionally coupled to each other. The fixing device is characterized in that it extends laterally through a locking notch formed in the lateral pin and is connectable to the lateral pin. 2. Fixing device according to claim 1, characterized in that the locking piece (11) has an arm which can be inserted into the locking notch of the lateral pin at a substantially right angle. 3. The fixing device according to claim 1, wherein the locking notch is an annular groove (9) provided on the peripheral surface of the lateral pin perpendicularly to the axis of the lateral pin. 4. The locking piece (11) comprises arms arranged in two foam shapes, the arms being insertable into the annular groove (9) for engaging around the transverse pin. Item 2. The fixing device according to item 2. 5. The fixing device according to claim 2, wherein the arm is a spring arm, and the spring arm can be elastically locked in the locking notch. 6. The spring arm has a recess (17) on the side facing the lateral pin, which approximately corresponds to the profile of the lateral pin in the area of the locking notch, which recess is engageable with the lateral pin. The fixing device according to claim 5, wherein 7. Fixing according to claim 1, wherein the opening (10) of the connecting piece (3) can be closed on the front side by a closing part (12) of the locking piece (11). apparatus. 8. The fixing device according to claim 7, wherein the closure (12) has a decoration. 9. The fixing device according to claim 1, wherein the locking piece (11) has a grip portion on the front side. 10. An additional portion (1) having a grip portion projecting on the front side.
Fixing device according to claim 9 formed by 3). 11. An annular groove (14) is formed on the peripheral surface of the additional portion (13) perpendicular to the axis of the additional portion.
0 fixing device. 12. The locking piece (11) comprises a sleeve (15) having an outer contour equal to the contour of the opening (10), the sleeve being engageable in the locking opening in the extent of the wall. The fixing device according to any one of claims 1 to 11. 13. The sleeve (15) is transversely penetrated and has one slit (16) open on the back side, the width of the slit being equal to the width of the transverse pin in the region of the locking notch. Item 12. The fixing device according to item 12. 14. The connecting piece (3) projects from the center of the free end of the watch band (1) into a receiving groove (4) extending in the longitudinal direction of the band, and the lateral pins extend from the connecting piece (3) to both sides. The projecting piece projects into the lateral hole of the watch band.
The fixing device according to any one of claims 1 to 13. 15. A horizontal pin half (6) with two horizontal pins.
And the lateral pin halves project symmetrically into the lateral hole (5) of the connecting piece (3) and each has one locking notch, which is locked to this locking notch. Piece (11)
15. The fixation device of claim 14, wherein the insert is insertable. 16. Fastening device according to claim 15, characterized in that the sleeve (15) is engageable in the extent of the wall with the locking notch of each transverse pin half (6). 17. Fixing device according to claim 1, which has a substantially rectangular cross section at the end (7) protruding from the lateral pin connection piece (3). 18. The method according to claim 1, wherein the free end of the lateral pin opposite the connecting piece (3) has a radial expansion (8). Fixing device. 19. Fastening device according to claim 18, wherein the radial dimension of the enlarged part (8) is larger than the diameter of the lateral hole of the watch band. 20. The fixing device according to claim 18, wherein the enlarged portion (8) has a decoration.