JPS5837289Y2 - watch band - Google Patents

Description

[Detailed description of the invention] This invention relates to a watch band mainly made of natural leather used for wristwatches.

As is well known, when producing natural leather, the raw hide prepared through preparatory work is tanned and then subjected to finishing works such as dyeing and greasing.

However, if a watch band made of natural leather manufactured in this manner is worn on the wrist and used for a long period of time, a ``rash'' may occur on the skin, although this is extremely rare.

As a result of repeated research by the inventors of the present invention regarding the causes of this "rash", it has been found that the following various factors are involved in the occurrence of "rash".

In other words, in the tanning process of raw hides, chromium compound tanning agents are often used, and as synthetic tanning agents, deleterious substances such as sulfonic acid derivatives such as phenol, cresol, and naphthol, and formaldehyde derivatives are used. Deleterious substances such as sulfuric acid, hydrochloric acid, and formic acid are used.

Also, during chrome tanning, deleterious substances such as formic acid and oxalic acid are often generated.

On the other hand, harmful substances such as formaldehyde and various alkalis are also used in the finishing process.

These deleterious substances such as chromium compounds usually remain in small amounts in the natural leather watch bands of products, and the dyes used in the dyeing process also of course remain in the watch bands of products.

If such a watch band is used, the harmful substances such as the chromium compounds and dyes may be leached directly from the band surface or dissolved and leached out by the sweat and heat generated from the skin, resulting in skin damage. It will stimulate.

Furthermore, while the watch band is worn on the wrist, the surface of the band constantly rubs against the skin due to the movement of the wrist, and as a result, the skin is constantly subject to physical stimulation.

Furthermore, in the finishing process of natural leather, animal and vegetable oils are often used to fatten the product, and in this case a considerable amount of animal and vegetable oils remains on the surface and inside of the product band. If used, the sweat and heat from the skin will decompose the oils and produce follicular decomposition products, which will easily create an environment suitable for the growth of bacteria on the surface and inside of the watch band. Because it itself is porous, sweat and oil from the skin can easily remain on the skin, creating an environment suitable for the breeding of various bacteria.For this reason, various bacteria such as mold can breed, and their toxins can irritate the skin. or

The skin becomes irritated due to the chemical, physical, and microbial stimuli mentioned above, and the aforementioned germs cause the rash to fester, causing the rash to progress further.

This idea was made based on the above knowledge, and focused on the effects of sweat, and sweat causes harmful substances such as chromium compounds to leach out, which irritates the skin, and sweat and oil can cause mold, etc. It prevents the creation of an environment suitable for the propagation of various bacteria, and also reduces physical irritation to the skin, thereby preventing the occurrence and progression of rashes and providing a good feel when worn on the arm. The purpose of the present invention is to provide a watch band that has the following characteristics.

That is, the watch band of this invention is characterized in that a sponge layer with open cells is formed on the back surface of the band body made of natural leather to provide breathability to the surface that comes into contact with the skin.

Below, an embodiment of this invention will be described in detail with reference to the drawings. Figure 1 shows the buckle side part of a watch band according to an embodiment of this invention. The buckle 2 is attached and the band body 1 is enclosed.
An insertion hole 3 is formed at the base end of the watch body, through which a spring bar (not shown) for attachment to the wristwatch body is inserted.

A sponge layer 4 made of soft polyurethane foam, soft vinyl chloride foam, foamed rubber, or the like is provided on the back surface of the band body 1.

The sponge layer 4 has open cells formed to have air permeability, and the optimum number of cells is about 20 cells per 25 mm, but in practice it is 13 to 30 cells per 25 mm.
There is no problem as long as it is a small amount.

The thickness of the sponge layer 4 may be determined as appropriate depending on the thickness of the band body 1, but is usually set to about 0.7 to 21R1It, preferably about 1 mm.

In order to provide the sponge layer 4 on the back surface of the band body 1, it may be attached to the band body 1 in a non-removable manner via an adhesive layer 5, for example, as shown in FIG. In the case of resin, the sponge layer 4 may be integrated with the band body 1 by welding.

Further, the sponge layer 4 may be detachably attached to the band body 1, for example, the sponge layer 4 may be attached to the band body 1 with double-sided adhesive tape, or as shown in FIG. The sponge layer 4 may be attached to the band body 1 by forming the holes 6 and forming projections 7 on the surface of the sponge layer 4, and removably fitting the projections T into the recessed holes 6.

In addition, when the projections 7 and the recessed holes 6 are used for attachment as described above, for example, as shown in FIG.
A hard membrane 8 is integrally formed on the surface of 0, and this hard membrane 8
The above-mentioned protrusion T may be formed on.

Further, in some cases, the protrusion 7 may be formed on the side of the band body 1, and the recess 6 may be formed on the side of the sponge layer 4 (i.e., the side of the sponge layer 4).
Alternatively, it may be formed on a hard film 8).

Further, it is desirable that the peripheral edge 4a of the sponge layer 4t-j is formed into a smooth arc shape by high frequency welding or the like, as shown in FIG. 2, for example.

Although only the buckle-side part of the watchband is shown in Figure 1, normally a sponge layer is provided on the back side of the band body even if the button is on the tip side.

Furthermore, it goes without saying that the sponge layer may be formed not on the entire back surface of the band body but only on the area that directly contacts the arm.

As mentioned above, in the case of a watch band that has a sponge layer with open cells on the back of the band body, the sponge layer on the back provides breathability to the surface that comes into contact with the skin. Sweat evaporates quickly, and as a result, sweat is prevented from reaching the band body. Therefore, harmful substances such as chromium compounds used in the tanning process of the raw hide of the band body made of natural leather, and sulfuric acid used as a pickle, etc. This prevents harmful substances, dyes, etc. from dissolving and leaching out of the band body, and even if these harmful substances, etc. do leak out, they are prevented from coming into direct contact with the skin.

Therefore, the above-mentioned deleterious substances and the like are effectively prevented from irritating the skin.

Furthermore, since sweat quickly evaporates in the sponge layer, the interaction between sweat and animal and vegetable oils and fats that remain in the natural leather or on its surface prevents the creation of an environment suitable for the breeding of bacteria. The toxins caused by proliferation are prevented from irritating the skin or causing suppuration, and since the sponge layer is flexible, it does not cause much physical irritation to the skin.

By reducing various types of irritation to the skin in this way, the occurrence of "rash" and the progression of "rash" are also prevented.

Furthermore, if the sponge layer 4 is removably attached to the band body 1 as described above, when the sponge layer becomes dirty, it can be removed and cleaned, or replaced with a new one. You can also get the desired effect.

As is clear from the above explanation, the watch band of this invention has a remarkable effect of preventing the occurrence and progression of rashes that tend to occur when buttons are made of natural leather bands, and also has a flexible sponge layer. Since it is provided on the back side of the band body, it also has the effect that it feels very good when worn on the arm.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the tip side of a watch band according to an embodiment of this invention, Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1, and Fig. Each of them shows another embodiment of this invention, and is an enlarged sectional view corresponding to FIG. 2. 1...Band body, 4...Sponge layer.

Claims (2)

[Scope of utility model registration request] (1) A watch band characterized in that a sponge layer with open cells is formed on the back side of a band body made of natural leather to provide breathability to the surface that comes into contact with the skin. (2) The watch band according to claim 1, wherein the sponge layer is detachably attached to the band body.