JPH03244404A - Watch band - Google Patents

Abstract

PURPOSE:To prevent the injure of good appearance at the time of use, the stay of dust, dirt, and soil in spaces and channel parts, and the damage of materials and cloths by providing circular curved surface parts having the same radius with the center of a rotating shaft as its center on the surface of the respective side surface parts in which surface pieces bodies mutually contact. CONSTITUTION:On the surface of the side surface part of each surface piece formed of the side surface part of a flange part 10a and the side surface part of a rib 10b in which surface pieces 10 are in contact to each other, a circular curved surface part 16 having the same radius R1 with the center of a rotating shaft 6 as its center is provided. Hence, the surface pieces 10 are mutually in line contact in their circular curved surface parts 16, so that no space is formed between the surface pieces 10 even if a watch band 9 is laid into a curved state. Respective shaft holes 12, 13 provided in the surface piece 10 and a back piece 11 are provided closer to the surface side surface over the respective thickness center parts of the surface and back pieces 10, 11. Thus, the square parts 14 on the surface sides of the surface pieces 10 are never largely separated to each other, and a nearly V-shaped channel part 15 is never extended. Projections are also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a watch band used for a wristwatch.

<Prior Art> Examples of watch bands used in conventional wristwatches include those shown in FIGS. 5 to 7.

This shows a metal watch band 1, in which a plurality of front pieces 2 are arranged next to each other, and the back is approximately incorporated into the front pieces 2 on both sides between the front pieces 2. A piece body 3 is interposed. Then, the rotation shaft 6 is inserted into each shaft hole 4.5 provided to communicate the front piece body 2 and the front printing body 3, and the front printing body 2 and the front printing body 3 are sequentially connected and extended. This constitutes the watch band l. Note that the rotation shaft 6 is connected to the front printing body 2 or the front printing body 3.
It is fixed to the shaft hole of one of the pieces, and both pieces are rotatable without being fixed to the shaft hole of the other piece. In most of the watch bands having this type of configuration, the rotating shaft 6 is fixed in the shaft hole 4 of the front plate 2 for aesthetic reasons and safety and health considerations, and the end face of the rotating shaft 6 and the front plate are connected to each other. The end surface of No. 2 is polished flush with the end surface of No. 2.

In addition, in order to rotate the front printing body 2 and the front printing body 3 around the rotation axis 6, and to make the watch band l into a curved state as a whole,
The cross-sectional shape of each front printing body 2 is inclined so that the width becomes narrower toward the back side.

When the watch band 1 is used, it is adjusted to correspond to the thickness and shape of the arms of various users, and its curved state is assumed to have a certain range in advance.

Therefore, the cross-sectional shape of the front printing body 2 is also inclined in accordance with the assumed range.

<Problems to be Solved by the Invention> However, in such a conventional watch band 1, since the cross-sectional shape of the front printing body 2 has an inclined shape that becomes narrower toward the back side, the seventh As shown in the figure, depending on the state of curvature, a gap S may be created between the front printing bodies. Further, since the rotation shaft 6 is arranged at the center of the thickness of the watch band l, when the watch band l is in a curved state, the front corner parts 7 of each front printing body 2 are separated from each other by a large distance. It ends up. Therefore, the substantially V-shaped groove portion 8 widens greatly, and the corner portions 7 also protrude greatly. Therefore, if you wear it on your arm, the internal structure will be visible, and
Dust, dirt, dirt, etc. accumulate in the groove 8 and the gap S, which not only impairs the aesthetic appearance but also tends to cause rust, and the protruding corner 7 may damage objects or clothing.

Furthermore, in recent years, there has been a strong tendency to increase the value of not only watches but also watch bands themselves in terms of decoration, and aesthetic considerations have become increasingly important.

The present invention was made by focusing on the problems of conventional watch bands, and is designed to prevent the appearance of the watch band from deteriorating when worn on the wrist, and to prevent dust, dirt, dirt, etc. from accumulating in the gaps and grooves. The present invention also aims to provide a watch band that does not damage objects or clothing.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the watch band according to the present invention has a convex pair of left and right shaft hole penetrating portions on the front side of the front plate, and The back side of the body is provided with a pair of left and right recesses into which the corresponding shaft hole penetrating portions of the left and right front printing bodies are incorporated, respectively, and a flange portion having the shaft holes, and further, a side surface of the front printing body, , a rib is provided in the pair of concave portions, and a circular curved surface portion having the same radius centered on the center of the rotation axis is provided on the surface of each side surface portion where the front printing bodies contact each other, This is a watch band in which the front printing bodies are in line contact with each other at their circular curved surface parts, and the above-mentioned shaft hole is provided closer to the front surface than the center of each thickness of both the front and back pieces,
Accordingly, the eye movement axis is arranged closer to the front surface than to the center of the thickness of both the front and back pieces. Furthermore, these front printing bodies and front printing bodies are formed by powder metallurgy, which involves sintering and forming metal powder or ceramic powder.

In the above and below descriptions, "front" and "back" refer to the outside and inside of the watch band when worn on the wrist, and "left and right" refer to the length of the watch band. This term is used to mean both directions along the horizontal direction.

<Function> With the above means, in the watch band according to the present invention, on the surface of each side surface where the front printing bodies are in contact with each other,
By providing circular curved surfaces with the same radius around the center of the rotation axis, the front printing bodies are brought into line contact with each other at their circular curved surfaces, so there is no gap between the front printing bodies. will no longer occur. In addition, since the rotation axis is located closer to the front surface than the center of the thickness of the front and back pieces, when the watch band is bent, the corners of the front side of the front plate will be far apart from each other. First, the substantially V-shaped groove does not widen greatly. Therefore, the protrusion of the corners is also reduced.

In addition, by molding these Uramachi bodies and Uramachi bodies using powder metallurgy, which involves sintering metal powder or ceramic powder, their complex shapes and shaft holes can be manufactured with higher precision and efficiency. I can do it.

<Example> Hereinafter, a preferred example of the present invention will be described based on FIGS. 1 to 4. Incidentally, the same reference numerals are given to the parts common to the conventional one, and redundant explanation will be omitted.

1 to 3 are diagrams showing an embodiment of a watch band according to the present invention.

This is constructed by arranging a plurality of back town bodies 10 adjacent to each other, and interposing a back town body 11 having a substantially B-shaped cross section between the back town bodies 10. A pair of convex shaft hole penetration parts 11a on the left and right sides are formed on the front side of the back town body 11, and left and right shaft holes through which the corresponding shaft hole penetration parts 11a of the left and right back town bodies 11 are respectively incorporated are formed on the back side of the back town body 10. A pair of recesses A are provided. In this way, the back-mall body 11 is substantially incorporated into the corresponding recess A of each of the adjacent back-mall bodies 10 on both sides. In addition, a flange portion 10a having a shaft hole 12 is provided on the side surface where the back-machi bodies 1O are in contact with each other.
In between, a rib 10b is provided at a portion corresponding to the above-mentioned recess. Then, the rotation shaft 6 is inserted into each shaft hole 12.13 provided to communicate the back town body IO and the back town body 11, and the back town body 10 and the back town body 11 are successively connected and extended in the left and right direction. This constitutes the watch band 9.

Here, the flange portion 1 where the Uramachi bodies 10 come into contact with each other is
By providing the surface of the side surface of each Uramachi body consisting of the side surface of 0a and the side surface of the rib 10b with a circularly curved surface section 16 having the same radius R3 and having the center of the rotating shaft 6 as its center, the Uramachi Since the bodies 10 are brought into line contact with each other at the circularly curved surface portions 16, there is no gap between the back-machi bodies 10 even if the watch band 9 is in a curved state. In addition, each shaft hole 12 provided in the Uramachi body 10 and the Uramachi body 11.
13 is provided closer to the front surface than the center of each thickness of the front and back pieces 10.11.

As a result, the group movement axis 6 is moved by the front and back pieces 10.1.
1, so that even if the watch band 9 is in a curved state as shown in FIG. They do not separate greatly, and the substantially V-shaped groove portion 15 does not widen greatly.

Therefore, the protrusion of the corner portion 14 is also reduced. Since the rest is basically the same as the conventional example described above, the explanation thereof will be omitted.

FIG. 4 is a diagram showing another embodiment of the watch band according to the present invention.

This was carried out by reversing the front and back sides of the previously described embodiment, and also, by combining and connecting two pieces, that is, two rows of back bands 18 to a back band 19, the watch band 17 was It consists of However, unlike the previous embodiment, Uramachi body 1
A large area portion H, which is the front surface of the flange portion 19a of 9, remains visible on the surface of the watch band 17 even when the backside body 18 is combined. That is, in this embodiment, the Uramachi body 19 constitutes a part of the "Uramachi body." In this case, watch band 17
A circular curved surface part 22 having the same radius R2 and having the center of the rotating shaft 6 as its center is provided on the surface of each side surface part where the back town bodies 19 that appear on the surface are in contact with each other. In addition, in this case, the shaft hole 20 of the back-machi body 18 and the shaft hole 21 provided in the back-machi body 19 are provided closer to the front surface than the respective thickness centers of the front and back pieces 18 and 19. Accordingly, the collective movement shaft 6 is arranged closer to the front surface than the center of each thickness of the front and back pieces 18, 19.

Since these operations are basically the same as those in the embodiments shown above, their explanations will be omitted.

Further, these back-machi body 10.18 and back-machi body 11.19 are molded by powder metallurgy in which metal powder is sintered and formed, which is a preferred molding method for simultaneous molding of complex shapes and shaft holes. It should be noted that "powder metallurgy" as used herein is not limited to metal powders such as iron, stainless steel, or precious metals, but has a broad meaning that includes ceramic powders and various types of reinforced plastics.

<Effects of the Invention> The watch band according to the present invention is as described above, and has a circular curved surface portion on the surface of each side surface where the Uramachi bodies are in contact with each other, and the Uramachi bodies are connected to each other. By making line contact at the circularly curved surface portion of the watch band, there will be no gap between the Uramachi bodies even if the watch band is in a curved state. In addition, by arranging the rotation axis closer to the front surface than to the center of each thickness of the front and back pieces, even when the watch band is curved, the front corners of the back and front pieces can be easily aligned. You won't be far apart. Therefore, the gap is also thicker (doesn't widen), and at the same time, the protrusion of the corners is also reduced.

These features prevent the internal structure from being visible even when worn on the arm, and at the same time prevent dust, dirt, etc. from accumulating in the grooves and gaps and spoiling the aesthetics. .

In addition, the protrusion of the corners of the Uramachi body is reduced, which has the effect of reducing the risk of damaging objects and clothing. Furthermore, it increases the decorative value of the watch band and is advantageous in terms of aesthetic considerations.

In addition, by forming the Uramachi body and the Ura piece body using powder metallurgy, which involves sintering metal powder or ceramic powder, it is possible to manufacture their complex shapes and shaft holes with higher precision and efficiency. This makes it even more advantageous in the manufacture of watch bands.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the watch band according to the present invention, Fig. 2 is a sectional view taken along the line indicated by the arrows in Fig. 1, and Fig. 3 is a view of the watch band in a curved state. A sectional view corresponding to FIG. 2, FIG. 4 is an exploded perspective view showing another embodiment of the watch band according to the present invention, FIG. 5 is an exploded perspective view showing a conventional watch band, and FIG. 6 is the same as FIG. 7 is a sectional view taken along the middle arrow line VI-VI, and FIG. 7 is a sectional view corresponding to FIG. 6 of the watch band in a curved state. Rotating shaft■■ Shaft hole penetration part recessed part 115 Figure 7

Claims (3)

[Claims] (1) A back piece body is interposed between adjacent front piece bodies, a rotation shaft is inserted into each shaft hole that communicates the front piece body and the back piece body, and the front piece body and the back piece body are connected. In a watch band constructed by sequentially connecting and extending in the left and right direction, on the front side of the back piece,
A pair of left and right shaft hole penetration parts are provided in a convex shape, and a pair of left and right recesses into which the corresponding shaft hole penetration parts of the left and right back piece bodies are respectively incorporated on the back side of the front piece body, and a flange part having the shaft hole. Further, a rib is provided on the side surface of the front piece body at the above-mentioned concave pair portion, and a rib is provided on the surface of each side face portion where the front piece bodies are in contact with each other. A watch band characterized in that it is provided with circularly curved surface portions having the same radius with the center as the center, and the front pieces are brought into line contact with each other at the circularly curved surface portions. (2) The above-mentioned shaft hole is provided closer to the front surface than the center of each thickness of both the front and back pieces, and the rotation axis is provided closer to the front surface than the center of the thickness of both the front and back pieces. 2. The watch band according to claim 1, wherein the watch band is a (3) The watch band according to claim 1 or 2, wherein the front piece and the back piece are formed by powder metallurgy in which metal powder or ceramic powder is sintered and formed.