JPS601612Y2 - watch band attachment device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment device for connecting the tail end of a watch band to the buckle clasp.

Since the length of a watch band needs to be adjusted depending on the thickness of the wrist of the user, or only the band needs to be replaced, the watch and band are attached removably.

Therefore, conventionally, there are various ways to connect this type of band tail end and buckle clasp, and these will be explained below.

Fig. 11 shows a snap-type attachment device, in which one end of a buckle clasp 1 is rounded to form a cylindrical portion 2, side walls 3 are provided on both lower sides of the buckle clasp, and the gap between the side walls is A shaft 5 provided at one end of the lever piece 4 formed in an L shape at the bottom of the tip.
A locking pawl 6 is raised from one end of this lever piece 4, and a locking piece 7 provided at the other end of this lever piece is brought into pressure contact with the outside of the cylindrical portion 2 to connect. do.

Reference numeral 8 denotes a band that is inserted from the tip of the buckle clasp 1, and recesses 9, 9 are provided at regular intervals on the bottom surface.
The locking claw 5 is locked inside and fixed.

Therefore, since the lever piece 4 uses the principle of leverage with the shaft 5 as the fulcrum, the clamp action point, that is, the locking pawl 6
Since the length from the buckle to the shaft 5 is required, there is a limit to how thin the buckle clasp can be made to be.

Moreover, after finishing the connection between the watch band 8 and the buckle clasp 1, the side wall 3 that pivotally supports the shaft 5 is likely to be scratched or deformed by scratches when the band is fastened or inserted.
This has the disadvantage that the maximum stress acts on the fulcrum hole provided in the lever, causing damage to the shaft support of the lever piece 4, resulting in defects.

FIG. 12 shows a mounting method using screws. One end of the buckle clasp 11 is rounded to form a cylindrical portion 22, and the buckle clasp is attached to the lower end of the side walls 13 and 13 at both ends of the buckle clasp 11. Attach the board 14 parallel to the metal fittings, and
One or more screw holes 15, 15 are provided in the screw hole 15.
A screw 16 is screwed into the band 8, and the tip of the screw is connected to a recess 9 provided in the band 8 to prevent it from coming off.

However, since the screw itself is tightened, a minimum number of screw threads is required in terms of torsional strength, and the thickness of the board 14 must necessarily be at least a certain thickness. There was a limit.

In addition, the screw threads may be damaged due to unstable tightening force, the screw may be damaged, and the driver groove may be damaged during tightening, and the screw 16 may become loose due to vibration during use.

Furthermore, there are disadvantages in that it is difficult to handle tapping, pilot holes, deburring, and extremely small screws to provide screw holes, and furthermore, it causes scratches with a screwdriver after finishing.

The present invention was developed in view of these conventional drawbacks, and in order to reduce the thickness of the buckle clasp to which the band end is attached as thin as possible, a roller pin is interposed between the clamping slope and the band. This is characterized in that the band is crimped and fixed to the buckle clasp in one direction.

Therefore, the thickness of the buckle clasp can be made thinner than that of the conventional buckle.

An embodiment of the present invention will be described with reference to the drawings.The main body 2 has a rounded rear end to form a cylindrical portion 12 to which the fasteners 18 and 19 are connected.
Side walls 23.23 are provided at the lower portions of both sides of the side wall 23.
23 is provided with an integrated or separate clamp plate 24 parallel to the main body, and a band insertion opening 25 is provided on the front of the front end of the main body.
form.

A second plane 28 is continuously provided on the upper surface of this clamp plate 24 from the insertion port 25 side via a first plane 26 parallel to the main body and a locking step 27, and from this second plane 28 there is a downward slope. A slope 29 is formed to the rear.

A spring bar 30 is connected to the tip of the band 32 inserted through the insertion port 25, and is detachably attached to a hole 31.31 provided in the side wall to prevent the band 32 from moving.

32 is a band made of metal, leather, resin, etc., and a plurality of recesses 33 are provided in the center of the back surface in a direction perpendicular to the longitudinal direction.

34 is a roller pin accommodated in the recess 33.

Note that 32a is a band whose lower surface is a rough surface 35.

Next, to explain the operation of this embodiment, the band 32 is inserted through the insertion opening 25 located at the front of the main body 21 shown in FIG. 2.3.

In this case, as shown in FIG. 2, if the spring bars 30 are removed from the holes 31, 31, the band 32 can be inserted while being hooked onto the cylindrical portion 22.

Next, when the roller pin 34 is housed in the recess 33 of the band and the band 32 is strongly pulled out, the roller pin 34 is pushed up by the slope of the clamp plate 24.
While crimping and clamping the band 32 to the main body 21, the second flat support 2
It is locked to a locking step 27 at one end of the 8.

In this case, the roller pin 34 is not necessarily locked to the locking step 27, but may of course be locked in the middle of the slope 29.

In this state, even if the band 32 is strongly pulled in the direction of arrow B in FIG. 4, the clamping force by the roller pin 34 is proportional to the pulling force with the maximum stress, so the band 32 will not come out of the main body 21 and will be safe. It is.

Next, if the spring rods 30 are removably installed in the holes 31, 31, the band 32 is pushed in the direction opposite to arrow B in FIG. As a result, the roller pin 34 does not escape from the recess 33.

In addition, as shown in FIG. 10, if a roller pin 34a having an elliptical cross section is used in place of the roller pin 34 having a circular cross section, an even stronger clamping effect can be achieved.

Furthermore, as shown in FIG. 9, it is not necessary to provide the stepped portion 27 on the upper surface of the clamp plate 24, and it is of course possible to provide only a slope 29.

As described above, the present invention provides a clamp plate with an inclined surface at the bottom of the main body which has an insertion opening on the front, holes on both rear side walls of the main body, and a band having a recess or rough surface on the lower surface from the insertion opening. The roller pin is inserted into the concave portion in a wedge shape, and the band is pulled out and the roller pin is pressed against the band by the slope provided on the upper surface of the clamp plate, and the roller pin is crimped and clamped to the main body. There is no need for any wall thickness other than the thickness of the clamp plate, which has sufficient strength, so the thickness of the main body can be made thin, and at the same time, a strong rank force in one direction can be used, and at the same time, a spring can be used to restrict the movement of the band in the other direction. By attaching the rod removably to the main body, it can be easily attached and detached and firmly attached, and by making the band connection part thinner, it fits on the arm, and the parts can be simplified, making it easier to park. This makes it possible to reduce costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway front view showing the state of use, Fig. 2 is a sectional view of the main body,
FIG. 3 is a front view of the same, FIG. 4 is a vertical cross-sectional view showing the connected shape, FIG. 5 is a bottom view of the band, and FIG. 6 is a cross-sectional view of another band.
Figure 7 is a front view of the roller pin, Figure 8 is A-A in Figure 7.
9 is a sectional view of the main body of the other 0 embodiments; FIG. 10 is an enlarged sectional view of other roller pins; 11th and 12th
The figures show conventional examples; FIG. 11 is a sectional view of a snap-type mounting device, and FIG. 12 is a sectional view of a screw-type mounting device. 21 is the main body, 24 is a clamp plate, 25 is a band insertion slot,
29 is a slope, 30 is a spring bar, 31 is a hole, 32 is a band,
33 is a concave portion, and 35 is a rough surface.

Claims (1)

[Scope of utility model registration request] A band insertion opening 25 is formed in the front of the main body 21, which has a connecting cylinder 22 at the rear, and a slope 29 that slopes downward toward the rear is formed on the upper surface of the clamp plate 24 located on the lower surface of this body.
At the same time, holes 31 and 31 for attaching spring bars are provided on both rear walls of the main body, and a band 32 having a rough surface or recesses at regular intervals on the lower surface is inserted into the insertion opening 25, and the rough surface is inserted into the insertion hole 25. Alternatively, a watch band attachment device is provided in which a roller pin 34 is locked in a wedge shape between the recess and the slope, and a spring bar 30 for preventing the band from retreating is removably hooked into the holes 31, 31.