JP2504744B2 - Timepiece structure and assembling method - Google Patents

Description

The present invention relates to a timepiece assembling structure and a timepiece assembling method.

[Conventional technology]

In recent years, the trend toward thinner watches has been increasing, and not only high-priced watches on the watch side made of metal but also low-priced watches on the watch side made of plastic material have been required in the market.

In particular, in the timepieces of the pointer display type, as the fashion progresses, the specifications of the side molded with a plastic material are increasing, and the demand is becoming stronger.

However, in the case of the molding side of plastic material, its mechanical strength is inferior to that of the watch side made of metal,
How to secure the strength of the watch is a problem in making it thinner.

7 and 8 are cross-sectional views showing a conventional timepiece structure.

FIG. 7 shows a structure in which the timepiece movement 1 is incorporated from the lower side of the side 2 made of plastic material. That is, the dial 5 is fixed by pushing the foot 5a into the timepiece movement 1, and the display member 6 is incorporated in the pointer shaft.
The watch movement 1 is held by the middle frame 18 and stored on the side 2. The inner frame 18 is held and fixed by the back cover 4. Reference numeral 3 is a windshield, and the structure of the timepiece side made of a plastic material is almost the same as that of the metal material.

As a method of incorporating the timepiece of FIG.
In this method, the foot 5a provided on the is pushed into the movement 1 and fixed, the display member 6 is assembled, the movement 1 is held by the middle frame 18, the side frame 2 is stored and the middle frame 18 is held by the back cover 4. is there.

In the timepiece structure shown in FIG. 8, the foot 5a of the dial 5 is press-fitted into the timepiece movement 1 so that the dial 5 is fixed to the timepiece movement 1 and the display member 6 is incorporated into the pointer shaft and the timepiece is extended to the inside of the sidepiece 2 to form the timepiece. The movement 1 is fixed, and the windshield 3 holds the dial 5, and the back cover 4 holds and fixes it from the back side.

As a method of incorporating the timepiece shown in FIG.
After assembling the dial plate 5 and the display member 6 in, the assembly is held from the upper side of the side 2 (the dial side) and held by the windshield 3.

[Problems to be solved by the invention]

However, in the case of the above configuration, in FIG. 7, since the side 2 needs to have a hole larger than the outer diameter of the dial 5, the side 2 has a thin ring shape. There is a concern that the strength of the timepiece will be reduced, and the strength of the timepiece will be insufficient, and side damage such as bending and bending will occur.

Unlike FIG. 7, in the case of FIG. 8, the thickness of the side is ensured, so that the breakage of the side such as bending and bending is eliminated by thinning, but in the windshield 3, the dial 5 is inserted. Since it is necessary to hold and hold the movement 1 by holding it, it is necessary to secure a fixing force with the side 2, and it becomes necessary to increase the fitting length and the like between the windshield 3 and the side 2. In addition, the dial plate 5 also requires a certain amount of strength and is not suitable for thinning because the plate thickness cannot be made thin. At the same time, the shape of the windshield 3 is concave, which increases the cost in the processing process and the corner portion 3a. It looks bad and is not suitable for fashion.

It is an object of the present invention to provide a fixing structure for a timepiece movement which can be adapted to a thinner timepiece, and a method for incorporating the same.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a side made of a plastic material into which a timepiece movement can be incorporated from a dial side, a back cover, a windshield, and the timepiece movement. And a dial, the holding member is fixed by the side and the back cover, holds the dial side of the timepiece movement, and the dial is positioned and fixed by the side. The windshield is fixed to the side.

In addition, as a method of assembling it, there is provided a side made of a plastic material capable of incorporating the timepiece movement from the dial side, a back cover, a windshield, a holding member for holding the timepiece movement, a dial and a display member. After fixing the holding member by the side and the back cover, the timepiece movement is incorporated from the dial side while avoiding the holding member, and the dial side of the timepiece movement is fixed by the holding member, and thereafter, The dial plate is positioned and fixed to the side, the display member is drivably fixed to the timepiece movement, and then the windshield is directly fixed to the side.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is an external plan view of the timepiece according to the present invention. First
FIG. 3 is a cross-sectional view of the push switch 9 of the timepiece and the outer peripheral portion of the timepiece according to the present invention, and FIG. FIG. 4 is a cross-sectional view of a main part showing a state in which the self-tapping screw 10 for fixing the back cover 4 is connected to the side 2. Further, FIG. 5 is a sectional view of the push switch 9 taken along the line AA in FIG. FIG. 6 is a plan view of an essential part of the embodiment of the present invention viewed from the back cover 4 side, showing a state in which the back cover 4 and the packing 12 are removed.

In the figure, first, the structure of a timepiece is shown, in which 1 is a timepiece movement, and a main plate 17 is laminated with timepiece components such as a coil terminal sheet 16 and the like. 2 is a side on which the movement 1 can be incorporated from the dial side. In the structure of the switch portion, the switch lever 8 is positioned and fixed to the bosses 2a, 2b and 2b 'provided on the side 2, and the contact spring portion 8a comes into contact with the pattern 16a of the coil terminal sheet 16, and The portion 8b is arranged corresponding to the boss portion 9a of the push switch 9. Next, the earth spring 7 having a function as a movement holding member is clamped and fixed to the back cover 4 via the side 2 and the packing 12 via the insulating switch spring seat 11 fitted to the boss 2a. The contact portion 7b is arranged at the corresponding position of the push switch 9, and the movement holding portions 7a and 7a 'are bent toward the dial plate 5 side and come into contact with the dredging portions 1a and 1a' of the main plate 17 to serve as ground contacts. ing. Push switch 9
Is glued and fixed to the side 2 with an adhesive 15. Movement 1
Is fixed to side 2 by side 2 and earth spring 7. Dial 5
Is fixed to the side 2 with the adhesive 13, and the minute display disc sheet 6b and the hour display disc sheet 6a are fixed to the movement 1 so as to be drivable thereabove, and the windshield plastic 3 is also attached to the upper side thereof. It is fixed by etc.

Next, as an assembling method, push switch 9 on side 2
The switch lever 8, which is the contact member, is inserted into the bosses 2a, 2b, and 2b 'provided on the side for positioning. Further, a cylindrical switch spring seat 11 made of an electrically insulating material such as plastic is incorporated in the boss 2a. Next, the boss 2 provided on the side 2 with the earth spring 7 which is also a movement holding member
Insert into c and 2c 'and position. Next, back cover packing 12
On the side 2, and the back cover 4 is provided on the side 2 with screw holes 2d to
The self-tapping screw 10 is fixed to four places 2d, and the earth spring 7, which is a movement holding member, is sandwiched and fixed between the side 2 and the back cover 4.

The movement 1 is inserted from the upper side of the side 2 and the steps 1b and 1b ′ of the main plate 17 of the movement 1 are positioned in the height direction on the receiving surfaces 2e to 2e ′ of the side 2 and at the same time provided on the earth spring 7. Movement holding parts 7a and 7a 'are movements 1
After the movement 1 is assembled from the dial 5 side by opening outward by utilizing the spring property of the movement holding portions 7a, 7a 'so as to be elastically caught by the dredging portions 1a, 1a' provided on the Release the springiness of the holding parts 7a, 7a ′,
By holding, the movement 1 is on the side 2 and the upper side, which is the dial 5 side, is the movement holding portions 7a and 7a ′.
Also, the lower side which is the case back side is cut by the cut portions 1b and 1b ′ of the main plate 17,
Each of them is positioned and held in both vertical and rotational directions.

The dial 5 is adhered to the side 2 directly with the adhesive tape 13, and the dial positioning dowel 2f provided on the side 2 is provided.
The notch portion of the dial plate 5 is engaged with the side face 2 to perform planar positioning with the side 2.

Next, both display members of the hour display disk sheet 6a for displaying the hour and the minute display disk sheet 6b for displaying the minute are incorporated into the movement 1, and finally the windshield plastic 3 is directly attached to the adhesive tape 14. The side attachment work is completed by fixing the attachment to the side 2.

Next, the configuration and operation around the push switch 9 will be described. For the push switch 9, the boss portion 9a that engages with the switch contact round hole 2g provided on the side 2 in advance is inserted,
Both ends 9b and 9b 'are fixed to the side 2 with an adhesive 15.

The switch spring 8 is provided with a spring portion 8a elastically contacting the time adjustment signal input portion pattern 16a provided on the coil terminal sheet 16 of the movement 1. Further, the switch spring 8 is provided with a spring portion 8b which is inserted into the lower portion of the boss portion 9a of the push switch 9 which engages with the round hole 2g for push switch contact provided on the side 2 described above. By pushing 9 from the upper part of the side 2, it is pushed down (in the direction of the arrow in FIG. 5) and covers the lack of restoring force of the push switch 9 which is a rubber material.

Below the spring portion 8b of the switch spring 8, there is a contact portion 7b provided on the above-mentioned earth spring 7, and the contact spring portion 8b of the switch spring 8 is deflected by pushing from above the push switch. By contacting 7b, a time adjustment signal is input and the time is adjusted.

According to the embodiment of the present invention, the total thickness of the side 2 portion is about 3.5 mm, which is greatly thin on the side of the plastic material, and in the case of the crown type used for the usual pointer indicating type, the side 2 has a lateral hole. It is necessary (usually about 1 mm), and in this case, the remaining thickness around the crown on the side 2 is reduced, so welds and weights during molding, cracks, cracks, etc. occur.

In this embodiment, the upper push switch eliminates the crown side hole to prevent the side from being damaged, and the upper push button has a new structure that does not exist in the conventional pointer indicating timepiece. Further, the side molding die may be a split die in two directions, up and down, and is not a split die in three directions such as a lateral hole, so that the die can be easily manufactured.

Further, the side 2 of the self-tapping screw 10 for fixing the back cover 4
Since the prepared holes 2d to 2d (Fig. 4) have a small total thickness on the side 2 as described above, the prepared holes are provided on the thick part of the side bezel (outer side of the windshield plastic), and the prepared hole tip has an R-shaped shape. , The concentration of stress is avoided, and the effective screw length of the self-tapping screw 10 is made as long as possible.

The movement 1 has its dial 5 side firmly held by the movement holding portions 7a, 7a 'of the earth spring 7, and the back cover 4 side firmly held by the side 2 receiving surfaces 2e, 2e'. The dial 5 does not have to support the movement 1 and can be fixed to both the adhesive tapes 13 on the side 2, and it is sufficient for the external force such as impact resistance to have a resistance to the fixing of only its own weight. Is. Also, unlike the usual dial, it does not require a foot for mounting the movement, and as mentioned above, it is not necessary to support the movement, so the thickness of the dial is less than half that of the conventional one, which is sufficient and cost effective. Has a structure that can be made thinner. Similarly to the dial plate 5, the windshield 3 is also directly fixed to the side 2 with the double-sided adhesive tape 14, and since the movement 1 and the dial plate 5 are fixed to the side 2 respectively, impact resistance, etc. With respect to the external force, it is sufficient to have a fixing force only by the weight of the windshield 3, and the fixing force is considerably smaller than that of the conventional structure example (Fig. 8), and the assembling is very easy. .

As is clear from the above embodiments, in order to make the plastic material thinner, the movement is incorporated from the upper side of the side to secure the side wall thickness, and the movement and dial are held in the windshield. With only the fixing force of and
Instead of carrying out the movement, by holding and fixing the dial side by the holding member, and by fixing the dial alone to the side, it is possible to reduce the thickness of the plastic material side.

Further, an upper push switch is provided in order to prevent the cross-sectional thickness from being reduced and the side strength from being reduced by providing a lateral hole on the side of the crown, push button, etc., which is a conventional timepiece correction operation portion. Also, in order to reduce the distance between the hands,
Instead of the conventional plate-shaped hands, by printing and forming each hand on an ultra-thin pointer display disc sheet, it is possible to prevent the watch from stopping due to contact between the hands, and to make it thinner.

〔The invention's effect〕

As described above, according to the present invention, since the side becomes inferior in strength when realizing the thinning and thinning of the side, it is possible to incorporate the thickness of the side from the movement dial side. The thickness from the movement to the side outer diameter is increased from the thickness from the plate to the side outer diameter to improve the strength in a plane.
The movement is supported by the movement holding member that is sandwiched and fixed to the side and the back cover, so that the movement does not directly hit the dial even if a shock is applied to the watch, so the dial itself The dial and windshield are positioned and fixed directly to the side, making the dial thin, and thus the watch itself thin, and facilitating processing by eliminating the dial feet. Since the fixing strength between the and side can be reduced as compared with the conventional one, it has various effects such as good designability and improved workability.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a timepiece according to an embodiment of the present invention, and FIG.
FIG. 3 is a plan view showing the appearance of a timepiece according to an embodiment of the present invention, FIG.
5 and 5 are cross-sectional views of an essential part of an embodiment of the present invention, FIG. 6 is a plan view of an essential part of the embodiment of the present invention, and FIGS. 7 and 8 are cross-sectional views of an essential part of a conventional example. 1 ... Movement, 2 ... Side, 3 ... Windshield, 4 ... Back cover, 5 ... Dial, 6a ... Hour display disc sheet, 6b ... Minute display disc sheet, 7 ... Movement holding The members are earth spring, 8 ... switch spring, 9 ... push switch, 10 ... self-tapping screw, 11 ... switch spring seat,
12 ... packing.

Claims (2)

(57) [Claims] 1. A watch movement, a side made of a plastic material into which the watch movement can be incorporated from the dial side, a back cover, a windshield, a holding member for holding the watch movement, and a dial. The holding member is fixed by the side and the back cover and holds the dial side of the timepiece movement, the dial is directly positioned and fixed by the side, and the windshield is directly fixed on the side. The structure of the watch characterized by. 2. A timepiece movement, a side made of a plastic material into which the timepiece movement can be incorporated from the dial side, a back cover, a windshield, a holding member for holding the timepiece movement, a dial, and a display member. After fixing the holding member by the side and the back lid, the watch movement is incorporated from the dial side while avoiding the holding member, and the dial side of the timepiece movement is fixed by the holding member. After fixing, the dial is positioned and fixed to the side, the display member is drivably fixed to the timepiece movement, and then the windshield is directly fixed to the side. .