KR850001789B1 - Watertight wrist-watch casing - Google Patents

Abstract

A case circumference is consisted of bolts to form an airtight adhesion between two parts by pressing a thin gasket of elastic polymer between the case circumference and the base. The inside of the outer metal parts is strongly stuck by adhesion to the circumference of the elastic body at least. The center is empty to allow the placement of watch parts on the inner surface of the metal plate. Bolts tighten up the base and the circumferential plane. The base consists of an inner layer of elastic polymer and the outer metal parts. The circumferential plane has thin layer on the bottom of case. The case band has bolts to affix the inner workings of the watch.

Description

Watertight wrist casing

1 is a perspective view of a floor common in both embodiments.

FIG. 2 is a plan view of a watch showing a visible part of the casing which is common to both embodiments showing a cross section taken along line II-II of FIG. 3, omitting some casing parts.

3 is an enlarged cross-sectional view taken along line III-III of FIG. 2 showing the features of the first embodiment;

4 is a cross-sectional view of the lower portion of the field of view of FIG. 2, omitting a portion of the casing portion and showing another portion in the direction of the arrow IV-IV of FIG.

5 is a cross-sectional view cut in the same manner as in the third diagram except for showing the second embodiment and its modified state.

FIG. 6 is a partial section similar to the fifth tile showing a more improved point.

* Explanation of symbols for main parts of the drawings

(1): metal plate (4): guide frame

(5): Screw holes (9), (41): Casing circumference

15: frame 24, 36: screw

(22) Machinery (32) Reinforcement rib

(34): glass plate (38): basic color

(39): screw socket

The present invention relates to a water-tight wristwatch casing that can be assembled to the case circumference with screws such that a thin gasket of elastomeric material is compressed between the case circumference and the bottom to form a tight seal between the two parts.

In known casings, the gaskets are each properly mounted in place, and the gaskets must be flexible to ensure proper sealing. But putting a very flexible gasket in place is not easy. If the gasket is placed, for example, on the inner surface of the lodging around the case, the gasket can be easily moved sideways, folded or creased, and once the casing is closed, the gasket cannot be checked. Furthermore, if the metal casing parts are tucked together in a closed state, the tolerances make it almost impossible to fit the gaskets installed in the metal casing parts in a suitable manner due to tolerances. On the other hand, if the bottom is pressed against the gasket without contacting the case circumference, there is a great risk of exceeding the limit of elasticity of the gasket that fixes the bottom to the case circumference. In a separate gasket, however, the lodging for it must be formed around the case or on the bottom, and therefore the question is whether it is possible to mass produce such complex parts.

There is also a known technique for casings in which the gaskets of elastomeric material are cup-shaped and together with glass constitute a hermetic covering in a suitable metal casing (Swiss Federal Application No. 2363/69). However, the latter is not hermetically so that water seeps into the casing and flows into the machine when opening the casing for repair.

The watertight wristwatching according to the present invention has a metal plate 1 having an edge 2 bent at a right angle and a thin elastomer layer 3 (hereinafter referred to as a layer) 3 embedded in the inner surface of the metal plate 1, They are strongly bonded by the bonding of metal / elastomer.

The edges 2 are joined to the case circumference 9 and at the same time the case circumference 9 is pressed against the thick part of the layer 3 so that the screws 24 are brought into close contact between the base plate 1 and the case circumference 9. Is fixed to the case circumference (9) to maintain confidentiality. In the layer 3, two projections 6 serving as screws in the conventional watch case and four pillars 7 which contact the bottom of the lodging 17 and support the dial 18 are protruded.

As shown in FIG. 1, the layer 3 strongly adhered to the inner surface of the base plate metal plate 1 of the watch and the periphery of the layer 3 are adjacent to the bent edges 2 of the metal plate 1. A guide frame 4 protruding upwardly slightly above the outer periphery of the edge 2 was installed. A hole 5 through the metal plate 1, the layer 3 and the guide frame 4 is drilled near the bottom four corners. The two projections 6 and the four pillars 7 are an essential component of the layer 3, in which one circular groove 8 is drilled but the inner surface of the metal plate 1 is visible.

The function of the protrusions 6, the pillars 7 and the grooves 8 will be described in detail below. The four holes 5 refer to the bottom fixing screws shown in the cross sectional view of the following figure. The guide frame 4 may be reduced by a triangular cutout formed at the corner of the metal plate 1, and the perforation of the screw hole 5 in the reduced wife frame 4 next to the corner may be performed. Suffice.

As shown in FIG. 1, the guide frame 4 and the layer 3, the protrusions 6, the pillars 7, the grooves 8 and the holes 5 for the set screws are connected to the component 1 under pressure. The polymerization is carried out in a mold to bond the metal / elastomer.

The wristwatch casing shown in FIG. 2 to FIG. 4 includes a casing circumference 9, the outer surface 10 of which is visible to the naked eye, so that delicate manipulation must be applied. The sapphire plate 11 covering the entire upper surface of the case circumference 9 is inseparably attached to the bottom surface and the case circumference together with a sleeve 14 which seals the gap between the case circumference 9 and the sapphire plate. Adheres to the opening 13 of the.

The frame 15 is in close contact with the glass plate 11 in the same manner as the sapphire plate 12, but the frame 15 may be made of a jewel or semi-precious stone visible to the naked eye through the glass plate 11, which is also a glass plate. It may be made of heavy or non-metal finished finishing of its upper surface to give a visually visible decorative design through (11). Therefore, the frame 15 can be simply formed by a coarse component in which metal coating is adhered to the bottom of the sapphire plate 12 by evaporating in a vacuum. Such a coating is formed to conceal the protrusions 16 and the sleeves 14 of the circumference of the case projecting between the frame 15 and the sapphire plate 12. The height of the protrusion 16 is equal to the thickness of the frame 15 so that the extended portion of the glass plate 11 is placed on the frame 15 and the upper surface of the protrusion 16.

The inner wall of the inner case circumference beside the opening 13 has a logging 17 for the clock face 18, a return 19 on the long side of the casing for the passage of the clock hand 20, and a machine of the watch. It is formed to be able to equip the logging 21 for the device. The lodging 21 is essentially the same as the inner wall of the guide frame 4 of the layer 3, as shown in FIG. 4 omitting part of the watch case bottom. Four holes 23 are drilled in the casing circumference 9 near the corners.

As shown in FIG. 3, the case bottom is corrected to the case circumference 9 by screws 24. Some of the heads 25 of all the screws are fitted to the logging 26 formed on the metal plate 1 of the case bottom.

In order to prevent all moisture from penetrating, the lower surface 27 of the head 25 and the inner surface of the logging 26 are trimmed to be as close as possible to each other as completely as possible. The screw 24 is configured to pass through the metal plate 1 by installing a few smooth surfaces 28 between the head 25 and the thread like a normal screw.

When the screw 24 is tightened into the hole 23 of the case circumference 9, the bent edge 2 of the bottom metal plate 1 presses the bottom surface of the case circumference 9. In order to protect the layer 3, the guide frame 4 extending above the height of the edge 2 of the metal plate 1 is arranged flat inside the edge 2. The guide frame 4 at the corner of the case is pressed by the smooth surface 28 of the screw 24 to protect the layer 3. The height of the guide frame protruding above the edge 2 of the bottom metal plate 1 enables to maintain the airtightness between the bottom and the case circumference 9 without generating internal stress in the guide frame 4 exceeding the limit of elasticity. . As shown in FIG. 3, each pillar 7 is located at the bottom of the dial 18 extending radially on the outer periphery of the mechanism 22 of the watch (see FIGS. 2 and 4).

The pillar 7 is so high as to support the dial 18 in contact with the shoulder of the case circumference 9 formed at the bottom of the lodging 17. The protrusion 6 is inserted into the lodging 29 in a known manner according to how the mechanism 22 of the watch is calibrated to the casing. The protrusion 6 is long and strong enough to support the frame 30 of the mechanism in contact with the casing shoulder (not shown) extending from the center of the long axis of the casing (FIGS. 4 and 3 and 2). See).

The mechanism 22 of the watch which is to be installed in the casing of the present invention is a mechanism of a quartz watch. In such a mechanism, the battery is placed in a groove 8 that is empty in the bottom metal plate 1 as shown in FIGS. 1 and 2.

The bottom of the casing according to the invention does not need to be flat. That is, if the bent edge (2) of the metal plate (1) is equally bent to press the case circumference (9) at all points, the bottom of the casing may be positioned in accordance with the bending of the wrist when the casing is closed. It can also be made in form.

The invention is not limited to the casing having the contour shown in the figures. It can also be used for orthogonal, hexagonal, casings of formulations and polygonal casings with more generally curved sides and circular casings under the same conditions. In all cases the invention has the advantage of substantially simplifying the operations required to insert and secure the mechanism casing of the watch and to close the latter.

It is assembled by placing the mechanism of the clock with the scrub plate and the needles in the case circumference 9, fixing the bottom thereon and finally screwing it in the case circumference 9. If necessary, hold the crown fixed to the adjusting knob 31 in place and connect it to the machine.

Finally, due to the reinforcing ribs 32 that not only reduce the monotony of the smooth surface, but also improve the air circulation between the wrist and watch, the metal plate 1 is made relatively thin, especially if it is made of stainless steel. It can be seen that.

In the embodiment shown on the left side of FIG. 5, the decorative frame 33 (jewel or semi-precious stone, polished heavy metal, delicately non-metallic) is adhered under the glass plate 34, and the spacer frame 35 is a frame ( 33) adheres underneath. The lodging 37 is brought into close contact with the frame 35 to the decorative frame 33 centered in the axial direction of the fixing screw 36 inserted through the metal plate 1 and the layer 3. The base collar 38 of the screw socket 39, which enters the hole 40 of the case circumference 41, is accommodated below. As soon as the screw 36 is tightened in the socket 39, the case circumference 41 is sandwiched between the spacer plate 35 (bonded with the glass plate 34) and the casing bottom (combination of the metal plate 1 and layer 3).

In the embodiment shown in the figure, the gap between the glass plate and the case circumference is sealed by a gasket 42 located inside the frames 33 and 35. Metallized areas formed by evaporation in vacuum and slightly larger than the gaskets 42 are pressed under the glass plate 34 to hide irregularities that may occur along the inner edges of the frame 33 as well as the gaskets 42. The frames 33 and 35 extend inward to the opening 43 of the case circumference 41 and the watertight gasket 42 extends on the flat upper surface of the case circumference 41 extending under the gap frame 35. Located in Therefore, the metallized frame 33 and the gasket 42 under the glass plate hide the possible irregularities of the inner edges. The modified state shown on the right side of FIG. 5 is due to the fact that the glass plate 34 carries around it a frame 44 which is in close contact with a thin metallized coating formed underneath the glass by evaporation in a vacuum. It differs from the embodiment just announced by the above. In this case, the base collar 38 of the socket 39 is soldered to the corresponding lodging of the frame 44. Here again the frame 44 extends inwardly to the edge of the opening 43 of the case circumference 41 and the gasket 42 is located in a groove provided on the upper case circumference 41 surface below this frame.

The glass plate 45 in the deformed state of FIG. 6 does not completely cover the visible surface of the case. It is in close contact with the heavy metal frame 46 to the outer edge of the case circumference 41. The socket 39 is engaged with the glass plate 45 by the space frame 35 which is tightly attached under the heavy metal frame 46 in the same manner as in the embodiment shown on the left side of FIG. However, the frame 35 is smaller than the frame 46 so that a watertight gasket 47 is located between the heavy metal frame 46 and the case circumference 41 to avoid any permanent pressure on the glass. The outer edges of the nonmetal frame are not damaged at all with the casing appearing on the outer surface of the casing.

The edges may for example be serrated, protected by a resistant coating, thereby improving the originality of the visual appearance. The lower surface of the frame 46 bound with the glass plate 45 when the screw 36 is tightened in the socket 39, the upper surface of the case circumference 41 and the upper and case circumference 41 of the bottom edge 2 bent up. The surfaces of) are interlocked and adjacent so that there are no gaps between them, so the casing looks like one piece. The assembly and soldering of all bottoms (1), (3) case circumference and glass plate as well as their close fitting are simple. In order to finally assemble the main parts of each manufactured watch, it is necessary to perform the following steps. Place the glass plate on the support with the watch case upside down and place the watertight gasket on the glass plate. Insert the socket with the glass plate into the hole in the case circumference.

Import the watch's mechanism around the case. Lock the mechanism adjusting shaft in place and connect it to the mechanism.

Cover with floor Its projection 6 is inserted into the corresponding lodging of the watch mechanism and tightens the screw 36 until the frame bound with the glass plate and the raised bottom edge are tucked around the case. The watertight gaskets are then pressed exactly to the desired range and firmly located in the desired place.

The casing according to the invention eliminates the disadvantages of conventional casings of that type because the gasket of elastomeric material is firmly bonded to the metal bottom of the casing. When closing the casing, the gasket is clearly positioned where it should be. Moreover, in assembling the assembly, there is no need to operate on a die like separate parts. The risk of exceeding the limit of elasticity of the gasket due to tolerances is also ruled out since the formation of the metal / elastomeric bond entails the polymerization of the elastomer in contact with the metal bottom part as well as in the closed mold, and thus the unit thus obtained. The shape and size of is precise as if the unit were produced by a machine tool.

The manner in which the elastomeric layer is bonded to the metal floor component also allows the production of a casing in which proper compression of the elastomeric layer is accurately determined by the bonding of the metal floor component to the caseband. Moreover, the latter is easily formed by simply placing the mechanism of the watch in the case circumference, fixing the mechanism in place in the casing, and fixing the bottom to the case circumference. The glass may at the same time adhere to the case circumference.

Claims (7)

The bottom is in close contact with the case circumference, but it is assembled by screwing on the case circumference with screws to compress the gasket of the elastomeric material between the case circumference and the bottom, and the inner surface of the outer metal part is firmly bonded to the metal / elastic polymerization at least in the peripheral part. A watertight wristwatch casing with said screw pressed against the outer circumferential surface of said thin layer on the bottom of said casing and the bottom and case circumference composed of a bonded, embedded thin elastomeric inner layer and said outer metal component. The metal plate of claim 1, wherein the metal plate is generally flat, but its edges are bent up to engage and contact the bottom of the lower case circumference, wherein the thin elastomeric layer is adjacent to the bent edges of the metal plate. The guide frame protrudes upwards around the layer, which extends beyond the bent edge when the casing is opened, but extends beyond the bent edge of the guide when the casing is closed. Guide frames extending beyond the bent edges when the casing is opened and extended below the bent edges by a lower surface do not cause the thin layer to exceed the elastic limit when the casing is closed. Watertight watch casing decided not to. 3. The watch mechanism according to claim 2, having a lodging adapted to receive a screw to secure the watch mechanism to the case band, wherein the watch mechanism is substituted for the screw in the thin layer that has been improved to accommodate the watch mechanism. Watertight watch casing with a cylindrical projection facing upwards, positioned to enter the screw lodging of the watch and positioned to apply axially upward pressure to the watch mechanism, and to hold the machine firmly in place in the casing. . 4. The apparatus of claim 3, further adapted to receive a caseband having a wristband and an inner shoulder for adjoining the clockface with a clockwork mechanism that radially extends beyond the edge of the clockwork mechanism. Watertight wristwatch casing with pillars as a component positioned to pass through the side of the watch's mechanism and press the dial against the caseband shoulder. 3. The watertight wristwatch casing according to claim 2, wherein the inner surface of said metal plate has a hollow central area for mounting a part of a machine part of a machine. 3. The metal plate according to claim 2, wherein the metal plate has a trimmed surface portion around every hole through which the bottom fixing screw passes, each of the bottom fixing screws having a trimmed lower surface which is in contact with the trimmed surface portion of the bottom around the hole. A watertight wrist watch casing consisting of a trimmed shaft portion between threads having a threaded portion that is passed through a metal bottom part by pressing and tightly surrounded by a flat pressed rim of the thin layer. 3. The screw according to claim 2, wherein a hole is provided for each bottom set screw through the case band from its bottom surface to its top surface and a screw socket engaged with the glass enters the hole of the case band and the bottom set screw. Watertight watch casing tightening the screw socket.

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