JPS6330249Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a band for a portable watch, and particularly to a piece of the length adjustment portion of the band and a connection between the pieces.

If we are to talk about conventional mobile watch bands, especially bands that have pieces mainly cut from solid material (referred to as solid block bands), the first
As shown in the figure, pieces 2 and 3 are attached to the female screw part 3 of piece 3 through the through holes of pieces 2 and 3 using the mounting screw 1.
Piece 2 and piece 3 are joined together at point a.

However, since such a structure uses the mounting screw 1, it has the following drawbacks.

In other words, (1) the screws may become loose while being carried, and in the worst case scenario, the band may come off and the watch may be lost;
It may be damaged.

The reason for this is explained as follows.

First, as the mounting screw 1 shown in FIG. 2, a mounting screw for a portable watch band is used. this is,
This is due to dimensional limitations due to the thickness and width of the band.To prevent general industrial screws from sagging, washers, nuts, pins, etc. are used to prevent various sagging phenomena (rotation, impact, etc.). It is well known that we are trying to deal with this. but,
As mentioned above, the mounting screw 1 shown in FIG. 2 is used due to dimensional conditions. Next, to discuss this mounting screw in some detail, the threaded part 1b is screwed into the female threaded part 3a of the piece 3.
In general, the threads of the valleys and crests of male and female threads are JIS
As stated in the standard, they are basically screwed together without any seams. That is, the screw tightening or return torque should not be controlled in the fully threaded portion, but the incompletely threaded portion 1a generates torque by engaging with the female threaded portion 3a. Generally speaking, it would be good to keep this incomplete threaded part 1a for a long time, but there are restrictions in terms of dimensions and processing, and it is not possible to deal with the various stress-induced sagging during carrying. is the current situation. Also, if the incomplete threaded portion 1a
If you increase the torque by increasing the torque, you will have to use a screwdriver to operate it through the screwdriver groove 1c, so since it is a mobile watch band, there is a risk of damage due to the small size, and the reliability is low. This can place a heavy burden on people, and may even lead to social problems such as arm problems.

(2) As a measure to prevent sagging, there is a method of applying a rubber adhesive to the threaded portion 1b. However, the method of applying the adhesive has poor workability;
Furthermore, depending on the amount of adhesive applied, it may flow out onto the exterior, damaging the exterior. Also, when there is not enough adhesive, it may lead to the sagging described in (1) above.

This will be explained in more detail below.

Generally, the length of a mobile watch band is adjusted at the time of sale to suit the thickness of the user's arm. Therefore, as a result of giving maximum consideration to the service at the retail store stage, the simplest mounting screws are used. In other words, the quality required here is at the retail store stage.
It is required to be able to increase or decrease the number of pieces of the band using a simple jig, that is, to adjust the length. The goal is to prevent it from happening inside. That is, in order to prevent the latter screw from loosening, adhesive is applied to the threaded portion 1b of the mounting screw 1. As a result, it is necessary to consider the effects on the human body due to the generation of organic gases contained in adhesives and to improve the working environment at work sites. In addition, as mentioned above, depending on the amount of adhesive applied, the adhesive may be too tight or may not be useful in preventing the screw from sagging.

In order to eliminate the above-mentioned drawbacks, the present invention eliminates mounting screws that are inherently weak against various external forces during carrying, that is, stresses that cause screw loosening, especially relative rotational moments between pieces, and impact forces. , To easily adjust the band length by forming a pair of through holes with different diameters in one piece, and by fitting the band fixing pipe and the band fixing pin with a shimmy fit, and to easily adjust the band length. It eliminates screw sagging and is highly reliable for a long time.
Moreover, it is an object of the present invention to provide a thin portable watch band at low cost.

The present invention will be explained in detail below with reference to FIGS. 3 to 5. Figure 3 shows an embodiment of the present invention, in which piece 1
2 and the piece 13 after assembly, 11 is a band fixing pin, which is inserted into the large diameter 13a of the piece plane sectional view shown in FIG. , and further small diameter 1 as shown in Figure 4.
3b, and at the tip 11a of the band fixing pin 11, there is a seam between the band fixing pipe 15 and the inner surface 15a of the band fixing pipe 15 as shown in FIG. It is fitted with a shimeshiro. That is, at this time, the band fixing pipe 15 is attached to the band fixing pin 11.
When the band pieces 12 and 13 are fitted with a shim, the large diameter and small diameter of each piece of the band pieces 12 and 13 are as follows.

d ₁ > d ₅ > d ₂ > d ₄ and d ₁ > d ₃ > d ₄ . Each symbol mentioned here holds true in the following cases.

d ₁ : Large diameter of piece 13 d ₂ : Small diameter of piece 12 d ₃ : Band fixing pipe 15 is connected to band fixing pin 1
d ₄ : Outer diameter of the tip 11a of the band fixing pin 11 d ₅ : Outer diameter of the head 11a of the band fixing pin 11. ing.

Due to the structure described above, this invention does not use mounting screws to connect the pieces, so it does not cause the so-called "screw slippage" that is the fate of screws, and is suitable for long-term portable use. It is highly reliable, the length of the band can be easily adjusted, and
Since there is no need to use adhesives to prevent sagging, the work environment is prevented from deteriorating, and work efficiency and quality are significantly improved. In addition, regarding the production of the pieces of the present invention, compared to conventional piece processing, pilot hole drilling and female thread cutting are no longer required, and it is sufficient to simply drill a pair of through holes, one large diameter and one small diameter. Since the through holes are provided on both sides of the band, the pipes to prevent pins from falling out need only be installed last, making it possible to automate the assembly and have the effect of improving yields at low cost.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view of a band connecting part using a conventional mounting screw, Fig. 2 is a diagram of a conventional mounting screw, and Fig. 3 is a plan view of a band connecting part using a bridge of the present invention. FIG. 4 is a plan sectional view of a piece of the present invention, FIG. 5 is a band fixing pin, and FIG. 6 is a plan view of a band fixing pipe. 1... Mounting screw, 2, 3... Piece, 11... Band fixing pin, 12, 13... Piece, 14... Band fixing pipe.

Claims (1)

[Scope of utility model registration request] A band piece body provided with concave and convex portions for connection at both ends, and a mobile watch band formed by using a plurality of the piece bodies and connecting the concave and convex portions of the pieces by fitting and connecting the pieces, in which a through hole is formed in the convex portions at both ends of the band piece body; , the through hole at one end is formed to have a larger diameter than the through hole at the other end, and when the pieces are fitted together, each through hole is in a position where the small diameter through hole is sandwiched between the large diameter through hole. A pin with a connecting head is inserted into the communicating hole, and the head of the pin is placed in the large diameter through hole on the insertion side on the one side, and the tip of the pin is placed in the large diameter through hole on the other side. When the pipe inserted into the through hole is fitted with a shim, the diameter of the large diameter through hole is _d1 , the diameter of the small diameter through hole is _d2 , and the pin is fitted. When the outer diameter of the pipe is d ₃ , the outer diameter of the pin tip is d ₄ , and the outer diameter of the pin head is d ₅ , there is a relationship of d ₁ > d ₅ > d ₂ > d ₄ , and d A mobile watch band characterized by a relationship of ₁ > d ₃ > d ₄ .