JPS6258241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment structure for a watch band clasp restraint fitting.

As a clasp for a watch band, it consists of a locking metal fitting that can be fixed at any position on one band, and a latch attached to the end of the other band, and the latch is attached to the locking metal fitting of the other band. There is a structure that connects the band by locking the band. This type of clasp allows you to adjust the length of the band as you like, and
It has the advantage of being easy to connect, but if the latch comes off the locking metal during use, both bands will separate completely, causing the watch to fall and be damaged. Sometimes it happens.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a clasp structure that can ensure engagement of the latch with the locking metal fitting and prevent the watch from falling. In accordance with this purpose, in the present invention, the force-retaining metal fittings are rotatably attached to both side plates of the locking metal fitting, and by doing so, the latch can be locked to the locking metal fitting and the force-holding metal fitting can be rotated. The latch can be moved to position it above the latch, thereby preventing the latch from coming off the latch.

Embodiments of the present invention will be described below with reference to the drawings.

This clasp consists of a locking fitting 1, a latch fitting 2, and a restraining fitting 3. The locking fitting 1 consists of a frame 4, a bottom plate 5, and a push plate 6, and the latch fitting 2 consists of a frame 7, a temporary latch 8, and a latch 10.

As shown in FIG.
It consists of book shafts 13, 14, and 15, and on the upper surface of the bottom plate 12, locking recesses 21 and locking protrusions 16 provided on the back surface of the bunt 20 are protruded at four locations. As shown in FIG. 3, the bottom plate 5 is rotatably attached to the shaft 14 of the main frame 4 at an ear 17, and has a bent portion 18 and a lower part of the shaft 15 to facilitate insertion of the band 20. The elastic part 22 that comes into contact with the bottom part 2 that presses the top surface of the band 20
4, and the bottom part 24 is made up of shaft rods 13 and 1.
It is slightly curved along the 4 and 15 directions.

As shown in FIG. 4, the pressing plate 6 is rotatably attached to the push rod 14 of the frame 4 at the winding part 25, and a pressing protrusion 26 is formed in a part of the winding part 25. The wound ends 27 and 28 are slightly bent so that a screwdriver, tweezers, etc. can be inserted into them.
It's open.

The frame 7 of the latch 2 is as shown in FIG.
The other band 30 is fixed by brazing or spot welding, and as shown in FIG.
A protruding claw 33 is provided in a part of the ear part 31. The temporary latch 8 is as shown in Fig. 7.
Hook portion 34 hung on the shaft 15 of the frame 4
and a winding part 35 which is pivotally connected to the shaft 32 of the frame 7, and the frame 7 is located outside the winding part.
A protrusion 36 is provided that comes into contact with the protrusion claw 33 of the hook 34 to prevent the hook portion 34 from rotating upward, and a notch 37 is provided on the inner side. As shown in FIG. 8, the latch 10 has a recessed portion 38 that engages with the shaft 13 of the frame 4, a winding portion 40 that pivots on the shaft 32 of the frame 7, and a hole 41. , Step portions 42 are provided on both sides of the winding portion 40 to contact the cutout portion 37 of the temporary latch 8 and rotate the temporary latch 8 upward.

To assemble the temporary latch 8 and the latch 10 to the frame 7, the winding part 35 of the temporary latch 8 and the winding part 4 of the latch 10 are
0 are combined so that the notch 37 and the step 42 engage with each other, and the frame 7 is pivotally connected to the shaft 32 attached to the ear 31 of the frame 7.

The restraining metal fitting 3 is pivotally attached to the outside of the both side plates 11 of the locking metal fitting 1 at both side wall portions 44, and the first
As shown in the figure, it is formed so that it can be straddled over and stacked on the latch 10, and a protrusion 45 that engages with the hole 41 of the latch 10 is provided at the tip.

Next, we will explain how to use this device. First, the band 20 is inserted between the bottom plate 12 and the bottom plate 5 of the frame 4, and the pressing plate 6 is rotated at an appropriate position according to the thickness of the arm to make the pressing protrusion 26 stand up. The frame 4 is fixed to the band by sandwiching it between the bottom plate 5 and the bottom plate 12. Next, place your finger on the tip of the latch 10 and pull it upward. At this time, the hook portion 34 of the temporary latch 8 is pulled upward together with the latch by the stepped portion 42, but the protruding portion 3 of the temporary latch 8
6 comes into contact with the protruding claw 33 of the frame 7, and fixes the hook portion 34 in a position where it can be easily hooked onto the second locking shaft rod 15 of the frame 4. In this state, the hook portion 34 is hooked onto the second locking shaft 15, and then the latch 10 is pushed down to engage the bite portion 38 with the first locking shaft 13. Subsequently, the presser catch 3 is rotated to overlap the latch 10, and the protrusion 45 is brought into close contact with the hole 41 of the latch. If you want to remove it, just do the reverse of the above operation.

In the above embodiment, the protrusion 45 of the force-retaining metal fitting 3 and the hole 41 that the protrusion engages with are not necessarily necessary, and the force-retaining metal fitting 3 can be fitted by fitting the wall portion 44 and the side plate 11 of the frame 4. It may be fixed to the frame 4.

As described above, according to the present invention, since the force-retaining metal fitting is pivoted to both side plates of the locking metal fitting, the number of parts can be reduced. Furthermore, since the force-retaining metal fitting is supported by two separate points, there is no risk of twisting the force-retaining metal fitting even if a twisting force is applied to the force-retaining metal fitting during operation.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the fastening state of the band by the clasp according to the present invention, Fig. 2 is a perspective view showing the frame of the locking fitting and the restraining fitting, Fig. 3 is a perspective view of the bottom plate, and Fig. 4 is FIG. 5 is a perspective view of the push plate, FIG. 5 is a sectional view showing the latch, FIG. 6 is a perspective view of the frame of the latch, FIG. 7 is a perspective view of the temporary latch, and FIG. 8 is a perspective view of the latch. FIG. 9 is a perspective view showing the base of the latch. 1...Latching metal fitting, 2...Latching metal fitting, 3...Pressure metal fitting, 4
... Frame, 5... Bottom plate, 6... Push plate, 7... Frame, 8... Temporary latch, 10... Latch, 11... Side plate, 12
...Bottom plate, 13, 14, 15... Axis rod, 16... Convex part,
17...Ear, 20...Band, 21...Convex part, 24...Bottom part, 26...Press projection, 30...Band, 34...Hook part, 36...Protrusion part, 37...Notch part, 38...Bite part, 41...Hole , 42...Step part, 45...Protrusion.

Claims (1)

[Claims] 1. A latch and a temporary latch are rotatably attached to the tips of one of the bands whose ends are attached to the watch, and the locking metal fitting is fixed at an arbitrary position on the other band with a push plate, and the locking metal fitting is In the clasp, the one band and the other band are fastened by hooking the temporary latch to the shaft of the locking fitting and biting and engaging the hooking portion of the locking fitting to the shaft of the locking fitting. A restraining metal fitting for holding down the latch from above is pivoted to the outside of both side plates of the fastening metal fitting, and a wall portion is formed by bending the laterally protruding portions of both sides of the pressing metal fitting downward at right angles. 2. A structure for mounting a watch band clasp retainer, characterized in that the retainer is held by engagement between the inner side of the wall portion and the outer side of the retainer.