JPH01487A - Watch side, a set of parts that make up the watch side, and how to assemble the watch side - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a side band at least a portion of which is made of a plastic material, a back, a side band that covers the side band, and an outer edge of the side band. The side of the watch includes a metal bevel extending over at least a portion of the face, and impermeable assembly means for the side band and the bevel.

The present invention also relates to a set of parts constituting the side of such a timepiece, and a method for assembling the set of parts.

The term watch as used in this specification refers to so-called watches such as wristwatches, pocket watches, and pendant watches.

[Conventional technology]

The published patent publication JP-B-55-17958 describes a watch side that meets the above general definition. A side band-back made of plastic material supports a disk-shaped back which is formed integrally with a portion of the side band. This side band is overmolded inside the metal glass bezel. The attachment includes teeth that make it impossible to disassemble the entire structure once the plastic injection is done. To provide impermeability between the side band-back and the glass bevel, packing is installed on the shoulder of the glass bevel before injection of the plastic. During injection molding of the bag, the packing is compressed to ensure the desired impermeability.

[Problem to be solved by the invention]

This technique is unsatisfactory for at least three reasons. First, the packing is susceptible to damage due to the high temperature of the liquid material used to compress the packing. While it is of course important to choose materials for such packing that are particularly resistant to high temperatures, such materials are not necessarily the best as far as the function that is sought to be ensured, i.e., impermeability on the part of the watch, is concerned. isn't it.

Also, the proposed packing surrounding the only two internal shoulders of the glass petite is not sufficiently localized or guided. This can cause the packing to shift or even tear during injection of the plastic material.

Finally, no matter how precisely the molding is done, traces of the plastic material will remain in areas that should not be covered (in this case, the visible glass edges), and these areas must be cleaned or deburred. However, cleaning, or removing debris, is considered to be relatively expensive.

Regarding the impermeable fixing of a watch glass made of organic material to the hour hand format, a French patent for assembling the glass bevel onto the side band is disclosed. FR-A-249164
The method proposed by No. 4 can be adopted. The French patent application proposes providing a groove in the glass bevel which is bent towards the inside of the glass bevel. The glass is supported on the shoulder of the glass bevel and a heated punch is passed through the glass to plastically deform the glass and infiltrate some of the plastic material into the grooves in the bevel. Apply to. At the same time, the packing is compressed between the glass edges and the glass. Although this method allows the glass to be fixed impermeably without the use of any mechanical fixing elements or adhesives, the result is unsatisfactory from an aesthetic point of view. Furthermore, to deform the material, such glass fixation techniques add a non-negligible mechanical challenge to deform the material. These forces create internal tension in the final product, causing the side of the watch to which the glass is attached to age.

The aim of the invention is to obtain an impermeable, reliable and low cost watch side.

[Means to solve the problem]

For this purpose, a side band, at least a portion of the periphery of which is formed of a plastic material, and a back covering the side band and extending over at least a portion of the outer edge surface of the side band; On the side of the watch comprising a metal bezel and impermeable assembly means for the side band and the bezel, said assembly means comprising a first annular seat extending radially within the bezel. is integrally formed with a portion of the side band made of a plastic material and extends radially into the first annular seat so that the side band and the glass rim cannot be separated. A watch side is obtained which includes an annular projection combined with the side band, a second annular seat formed by combining the side band and the glass bevel, and a packing occupying the second annular seat.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to convention.

FIG. 1 shows the side of a watch assembled according to a first embodiment of the invention. Essentially, the side of the watch has a side band-back 2 made of plastic material, a glass bezel 1 made of metal, and a packing 4.

The side band-back 2 formed in one piece comprises a first disk-shaped part forming the back 8 and a side band part 1.
0.

This side band-back is a monocoque structure, and the movement is installed from above the side band 10. To support the movement, its side bands are provided with enlarged rings 11 and supports 12. An opening (not shown) can be provided in the bag 9 to allow battery replacement. The opening is normally covered by a cover. The monocoque side band offers the advantage of automatic transfer and easy assembly of the watch in Macun. actually,
All installations are done from the same side, the top of the watch, and there is no need to rebuild the watch in order to install the necessary parts on the watch. This embodiment also has the advantage that the back occupies a very small proportion of the thickness of the watch.

A significant advantage is also obtained by forming the side band-backs from plastic material, which results in a much cheaper component than side band-backs made of P1 steel. In fact, this part has a complex structure and must be formed with high precision, so if it were to be made from metal, each part would have to undergo numerous individual and costly machining processes. It's expensive because it has to be done. When manufacturing from plastic materials, the complexity of the structure and the high degree of precision required are the result of injection molding, which allows the production of a large number of parts to the desired precision without post-injection finishing. This results in the structure of It is also an advantage that no extra parts are required, since the enlarged ring can be manufactured at the same time as the side band-back.

It should also be noted that the allergic phenomenon that can irritate the skin caused by steel bags does not occur with plastic bags.

However, even if we only focus on the mundane aesthetic aspects of the visible parts of the plastic sideband-back (the edges of the sideband and the glass bevel), we cannot say that the plastic sideband is completely advantageous. The fact remains. This gives the impression that the watch is cheap, which leads people to avoid purchasing especially middle-class watches. Furthermore, the visible parts are highly affected by external mechanical stresses, so that they are easily scratched, resulting in a rapid deterioration of the aesthetic aspect. To avoid this, the watch of the invention includes a metal glass bezel 1 which covers the side band part 10 and extends on its side, over at least part of the surface of the outer edge of the band part. This glass bezel can be made from copper. Decorative waves on its steel glass edges
It may be covered with (hard material, gold plating, etc.) or it may not be covered.

Several methods are conceivable for assembling the side band-back to the glass frame. In particular, there are methods disclosed in the aforementioned patent publications and patent application publications. However, these methods are not necessarily suitable for the reasons mentioned above. Standard lid or Swiss patent publication CH-A-230,5
It is also possible to use lids with snaps of the type described in No. 26. According to the Swiss patent publication, seven langes are provided on the periphery of the bag. Its 7 edges receive mounting rods that cooperate with grooves provided in the side bands. Attachment is such that the bar and groove cooperate in such a way that the bag is kept under tension and crushes the packing provided between the bag and the side bands. However, this method is not satisfactory if the bulk is made of plastic. In fact, with this method, an inconstant force is applied to the packing, which causes a thin section of the packing, and since the section of the packing is not constant over the entire periphery,
It has been found that impermeability is not guaranteed. Furthermore, the grooves provided in the metal side bands may have cutting edges that can cause damage to the rods in plastic attachments.

According to the invention, the impermeable sealing means of the sideband-back 2 and the glass bezel 1 thus have a first annular seat 6 extending radially into the bevel 1. An annular projection 13 integrally formed with the side band-back 2 is inserted into the annular seat #g1. a first seat 6;
Due to the shape of the projection 13 inserted into its seat, the side band-back 2 cannot be separated from the glass bezel 1. At the same time, according to the invention, the assembly means also include a second annular seat 7.

This second seat 7 is formed by a side band-back and a glass tab, and a packing 4 is packed into the second seat 7. For this packing, a space between the side band 10 and the glass tab 1 is inserted. The sides can be made impermeable to liquids that may enter the watch and then penetrate into the interior of the watch in the area of the dial.

In FIG. 1, a second annular seat 7 is provided between the glass bevel 1 and the top of the side band portion 10 and is formed by a groove provided in the glass bevel 1.

The groove is closed by the top of the side band portion 10. Although not illustrated, it will be readily appreciated that the groove can be provided in the top 14 of the side band portion 10. The groove is closed by the upper flat edge of the glass rim.

The side bands are made of plastic. Any suitable material may be used for the fabrication of the side bands.

The plastic material may be selected from the group including acrylic-butadiene styrene (BS), acrylic styrene acrylic-ester (ASA), and styrene acrylic nitrile (SAN).

Glass globules or glass fiber reinforced polyimide can also be used.

The side described above is completely impermeable and exhibits excellent practicality. In fact, the side band-back and glass bevel attachments are inseparable and the packing is always kept under constant compression in the seat, even under stress, for example due to shock or temperature changes. Furthermore, although it is inexpensive, it can be sealed reliably and dimensional accuracy can be reproduced.

The side of the watch according to the invention is assembled starting from a set of parts including the side band-back 2, the glass bezel 1 and the packing 4. Before assembly, the packing 4 takes the form described below. Various parts are shown in FIGS. 2 and 3. FIG. 3 is an enlarged view of the part surrounded by a circle ``■'' in FIG. 2.

The outer peripheral edge of the side band portion 10 of the side band-back 2 is
It exhibits a step-like structure including a first lower wall 15, a second upper wall 16, and an inclined R1γ forming an acute angle α between the second wall 16. The step 17 forms a pointed ridge 18 . The glass bezel 1 has a first inner surface 19 and a second inner surface 19.
includes an inner surface 20 of. Their inner surfaces 19 and 20 have a shape that corresponds to the shape of the first and second walls, respectively, of the sideband portions. A first seat 6 provided on the glass bezel 1 is arranged between the inner surfaces 19 and 20. Side band-back 2
is inserted into the glass bevel 1, the sharp protuberance 1
8 corresponds to the horizontal surface 21 of the first seat 6. The parts shown in FIGS. 2 and 3 also include a packing 4 packed into the second seat of the glass bezel 1.

An inclined step 17 is provided around the entire circumference of the side band portion 10. If the movement to be inserted into the watch has a time-setting shaft, the side band should form an integral part with the hook 2 to receive the tube through which the time-setting shaft passes. Step 1T is not provided near the part. Similarly, the sloped steps 1T can also be discontinuous, with several sections arranged annularly around sections of the side band. It is not necessary to provide the first seat continuously, and it is also possible to provide the first seat by making several cuts in the glass edge. Each cut receives a discontinuous sloped step 1T. Such a structure allows the side panning pack 2 to be positioned at an angle with respect to the glass bezel 1.

Next, a method for assembling the timepiece of the present invention will be explained.

First, insert the side band-back 2 into the glass bevel 1 until the pointed edge 18 rests against the surface 21 of the first seat 6 of the bevel 1 (as shown in FIGS. 2 and 3). (Please refer to this starting position). Since the glass bezel 1 is placed on the support, the acoustic transducer 2 applies high frequency mechanical vibration in the direction of the arrow 23.
2 applies pressure to the side band-back 22. The ultrasonic energy generated by the transducer 22 concentrates on the sharp edge 13 and melts the edge;
Then, the entire sloped step 17 is melted, and the material below the step is also melted. The molten substance fills the first seat of glass rim 1. Emission of ultrasonic energy is stopped when the top part 14 of the side band part 10 comes into contact with the glass bezel 1. The packing 4 is then compressed into the second seat T.

The assembly work ends here. This results in a sealed, inseparable assembly. The sides will then look like those shown in Figure 1.

It is also possible to apply an acoustic transducer to the glass edges. In that case a side band-back is supported.

The same result is obtained in this case as well.

Figure 4 shows one of the fully assembled watches using the side of the invention.
It is a partial sectional view when indicating 2 o'clock. This figure is similar to FIG. 1, which shows the case of only one side. After assembling the side shown in FIG. 1, the movement 24 is assembled. The outer edge of the movement is the shoulder 12 of the side pando pack 2.
placed on top. Next, the dial 25 is set to 1, and then the hands 26 are attached. Then, place 7 on the inner periphery of glass bezel 1.
Enter lunge 27. Finally, push in the glass 28,
7 Push in the sealing gasket 29 on top of the flange 27 to make the watch impermeable. In this way, a watch is obtained which has a monocoque side band-back made of plastic covered by a metal glass bevel. The finish of this watch is very good and highly impermeable. Note that the metal glass tabs are attached to the bracelet according to known methods, but are not shown.

FIG. 5 shows the side of an assembled clock according to a second embodiment of the invention. The side of the watch includes a side band 30. At least the periphery of this side band is made of plastic material. In this case, the side band is not made of plastic only, but has a metal ring 32 surrounded by a plastic cover 31.

In this structure, the side bags 33 are independent from the side bands and are assembled to the side bands, for example in a snap manner.

Figure g5 also shows assembly means similar to those described for the first embodiment. A first annular seat 6 extending radially into the glass bevel 1 and an identical annular projection 1 formed integrally with the plastic covering part 31 of the side band.
3 and a second annular seat T into which the packing 4 is stuffed.

Shroud 31 is shown alone in FIGS. 6 and 7. In those figures, the cover 31 is shown as a ring divided by 35 and includes three regions, namely an inclined step 1T. The ring has a hole 36 through which the time setting shaft or winding shaft passes. As can be easily seen from FIG. 7, which is a cross-sectional view taken along the line ■-■ in FIG. 6, the cover also includes a stepped outer periphery.

Its outer periphery has a first lower wall 15, a second upper wall 16 and an inclined step 1T. This inclined step forms an acute angle α with the second wall 16 and exhibits a pointed edge 18 . The shapes of the first wall 15 and the second wall 16 correspond to the shapes of the first and second inner surfaces 19,20 of the glass bevel 1, respectively, as shown in FIG. Therefore, assembly is performed in the same manner as the method using ultrasonic vibrations described with reference to FIGS. 1 to 4.

It can be easily seen from FIGS. 5 and 7 that the cover 31 is compressed around the ring 32 by its own elasticity. A trapezoidal boss provided inside the shroud 31 is inserted into a similarly shaped housing provided within the ring 32. The cover can be slightly expanded and placed on the ring by the division part 35 of a-. However, the ring can also be molded directly onto the ring.

In contrast to the first embodiment, this second embodiment is in the sense that the movement is inserted from below and that the side is closed with a screwed or snap-fastened back. It's more standard. The glass is placed on the flank, which is integrally formed with the ring 32.

This second embodiment is particularly useful when assembling two metal parts with different properties, for example a side band made of steel and a glass bezel made of hard metal. It is known that hard metals (eg TiN, WC) cannot maintain dimensions within small tolerances in the raw state, thus requiring machining of the part in subsequent steps. This cover fits within this tolerance by itself, and the side band itself is sufficiently precise to receive the movement and back by, for example, contour turning, so if the cover of the present invention is used, no machining step is necessary. It is.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of the side of a watch assembled according to the first embodiment of the invention, FIG. 2 is a partial sectional view of the side of the watch of the invention before it is assembled, and FIG. The enlarged view inside the circle in Figure 2, Figure 4 shows the fully assembled watch.
5 is a partial sectional view of the side of a watch assembled according to the second embodiment of the invention; FIG.
A plan view of the plastic cover attached to the side band shown in the figure, and FIG. 7 is a cross-sectional view taken along the line -■ in FIG. 6. 1...Glass edge, 2@...Side band-back,
4..., - Packing, 6 Φ... 1st seat, T exposed φ37 2nd seat, 1011... Side band, 13...
...Protrusion, 15...Middle lower side wall, 16...Upper side wall,
17... Sloped step, 18... Pointed edge,
22...TV) Lanceducer. Patent Applicant Utair Varnish Fabric Depoche

Claims (3)

[Claims] (1) a side band having at least a portion of its periphery formed of a plastic material; and a back; and a metal glass covering the side band and extending over at least a portion of the outer edge surface of the side band. On the side of the watch comprising a bevel, a side band and impermeable assembly means for the bevel, said assembling means comprising a first annular seat extending radially within the bevel and for the side band. an annular shape integrally formed with a part made of plastic material, extending radially into the first annular seat and mated to said first annular seat in such a way that the side band and the glass bevel cannot be separated; A side of a watch, comprising a protrusion, a second annular seat formed by combining the side band and the glass bevel, and a packing that occupies the second annular seat. (2) including a side band at least a peripheral portion of which is formed of a plastic material, a glass bead, and a packing;
Said periphery made of plastics material comprises a first wall on the lower side, a second wall on the upper side and an inclined step presenting a sharp edge at an acute angle α with respect to said second wall. In a set of parts constituting the side of a watch exhibiting a stepped outer periphery having a first inner side surface having a shape matching the shape of a first wall of the side band; a second interior side having a shape matching the shape of a second wall; and a first seat disposed between the first interior side and the second interior side, the side band being made of glass. When I was put in the trap, the first
The sharp edge is pressed against the surface of the seat, and the packing is packed inside a second seat provided in the top of the side band or in the glass bevel facing the upper part of the side band. 1 constituting the side of the watch characterized by
parts of a set. (3) including a side band whose periphery is made of a plastic material, a glass bead, and a packing;
Said periphery made of plastics material comprises a first wall on the lower side, a second wall on the upper side and an inclined step presenting a sharp edge at an acute angle α with respect to said second wall. In a set of parts constituting the side of the watch, the glass bead has a first inner side surface having a shape corresponding to the shape of the first wall of the side band; a second interior side surface having a shape conforming to the shape of a second wall, and a first seat provided between the first interior side surface and the second interior side surface;
The pointed edge is pressed against the surface of the first seat when the side band is placed into the glass bevel, and the pointed edge is pressed into the top of the side band or into the portion of the glass bevel facing the upper portion of the side band. providing a set of parts to be filled with packing inside a second seat provided; The process of placing the material in a bevel and applying pressure to the side band or bevel using an acoustic transducer that applies high-frequency mechanical vibrations melts the sloped steps and deposits the molten material in the first seat of the bevel. non-disassembleable, characterized in that it comprises the steps of packing, and ceasing the application of pressure when the top of the side band contacts the glass bead, and then compressing the packing into the second seat. How to assemble the side of the watch.