JP3209981B2 - Watch parts fixing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a thin plate component incorporated in a main plate of a timepiece.

[0002]

2. Description of the Related Art A conventional timepiece component (especially a thin plate component) has a fixing structure as shown in FIGS. 5A and 5B or a fixing structure by screwing. FIG. 5 is a sectional view showing a first conventional example, in which a hook portion 13a of a holding plate 13, which is a thin plate member, is engaged with a projection 1y on the outer peripheral portion of the base plate 1 and is fixed in position. Further, in the screw fixing structure according to the second conventional example, a pin for screwing is driven into the base plate, and the holding plate is fixed to the base plate with screws.

[0003]

However, the fixing structure using the hook of the first conventional example cannot be adopted when other parts are arranged on the outer periphery of the holding plate 13 because the fixing is performed by the outer peripheral portion of the base plate. If a fixed part with a hook is provided at the center of the main plate, it is necessary to turn the main plate upside down during disassembly.
Workability will be significantly reduced. In the second conventional screw tightening and fixing structure, the processing cost of screws and screw pins increases,
It was necessary to make the base plate thick to secure the fixing force of the screw pin.

Therefore, the present invention is to solve such a problem, and to provide a low-cost thin plate member fixing structure which is excellent in assembling and disassembling properties.

[0005]

SUMMARY OF THE INVENTION A timepiece component fixing structure according to the present invention includes a thin plate member and a base plate for fixing the thin plate member, and the base plate has an upper surface on an edge of the thin plate member from above. A protruding portion to be engaged, a protruding portion disposed at a position adjacent to the protruding portion on the near side in the introduction direction of the thin plate member and abutting on a plate surface of the thin plate member from below, and the thin plate engaged with the protruding portion A regulating portion for regulating the position of the member in the planar direction is provided, and the thin plate member between the protrusion and the protrusion is pressed downward so that the thin plate member can engage with the protrusion. The thin plate member moves in a planar manner in a state where the thin plate member is superimposed on the base plate, and the thin plate member is engaged with the protruding portion. Before and after positioning in the direction Wherein the thin plate members is configured to be positioned on a plane by the regulating unit.

[0006]

[0007]

[0008]

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

FIG. 1 is a plan view showing an embodiment of the present invention, which is a date / day display side of a small wristwatch movement with date / day display for women. The structure will be briefly described. The normal calendar feed mechanism transmits the engagement from the hour wheel 9 serving as the hour hand attaching member to the date driving wheel 3, and the date feeding claw 3a formed on the date driving wheel.
Moves the tooth 6a of the date indicator 6 as a date display member by one day, and the date display is sent once a day. The day feed claw 3b of the date wheel 3 advances the teeth 7a of the day wheel 7 by one day and sends the day display once a day. The day indicator 7 has a display plate (not shown) and displays the day. The date indicator 6 is guided by the guide portions 1j, 1q, 1t of the main plate 1 and is positioned by the date jumper 16.
The day indicator 7 is guided by the hour wheel 4, is prevented from coming off by the day indicator stop seat 5, and is positioned by the day jumper 2 k formed on the date indicator holder 2.

The calendar display quick correction mechanism sets the winding stem 8, which is an external operation member, to a calendar correction state, engages the winding stem 8 with the transmission wheel 9, and rotates the transmission stem 9 from the transmission wheel 9 by rotating the winding stem 8. The meshing with the transmission wheel 10 and the rocking wheel 11 is transmitted, and the rocking wheel 11 moves along the long hole 1p of the main plate to become 11 '. 1
At 1 '', the day wheel 7 is corrected via the day correction transmission wheel 12.

FIGS. 1 (a) and 3 (b) are cross-sectional views showing a state in which the date indicator holder 2 which is a thin plate member for holding these many parts between the main plate 1 and the date indicator holder is assembled. ). The date wheel retainer 2 is a protrusion 1 provided on the main plate 1.
Positioning on the side of the base plate is performed by the v, 1w, 1t, 1u portions and the like, so that the distance between each component and the base plate 1 is appropriately maintained. Also, three projections 1a, 1b, and 1c of the main plate 1 hang over the upper portions 2a, 2b, and 2c of the date indicator holder 2, respectively.
However, the position is regulated so as not to separate from the main plate 1. The planar positioning of the date wheel holder 2 is performed by two dowels 1 on the main plate 1.
The holes 2p and 2q of the sunshade presser 2 engage with 1.multidot.1m, respectively, for positioning. The length of the dowels 1l and 1m is limited because of the dayboard. Therefore, the length of engagement with the date wheel holder 2 is also shortened, and it is easy to come off due to impact or the like.
Means (a) and (b) are taken. On the side of FIG. 3 (a), the date indicator holder 2 is provided with a 2g portion having spring properties, and the 2g portion is bent toward the main plate side to engage with the date indicator holder 2 even if the date indicator holder 2 is separated from the main plate 1. The part 2p does not come off from the dowel 11 of the main plate. 3B, since there is no space for providing a spring portion in the date wheel holder, a half blanking process is performed to extract the 2i portion to the half of the main plate side about half the thickness of the date wheel holder, and the dowel 1m and the hole 2q are formed. The engagement length is increased. The protrusions 1v, 1u, 1m and the protrusions 1a, 1b, 1c of the main plate for positioning the date wheel holder 2 in the sectional direction are adjacent to each other, and the date plate 2 is sandwiched from above and below. This prevents rattling and detachment of the wheel retainer 2.

A method of incorporating the date wheel holder 2 will be described. FIG. 2 is a plan view showing a state before assembling the date wheel holder, and FIG. 4 is a sectional view. Place the date wheel retainer 2 at a position where the main plate 1a and the 2h portion of the date wheel retainer are in contact with each other.
・ 2t ・ 2s part using jig 15 such as tweezers. The date wheel presser 2 may be pushed under the projections 1a, 1b, 1c of the main plate until the dowels 11, 1m and the holes 2p, 2q engage. At this time, the 2r, 2t, and 2s portions are slightly recessed so that the stability of the jig 15 is improved and the pushing force is reliably transmitted to the date indicator holder 2. In addition, this concave shape serves as a guide for the position to be pushed in, thereby improving the assemblability. In the machine set, the 2r, 2t, and 2s portions can be assembled by inserting the guide pins of the machine into the two locations of the guide holes 2m and 2l while rotating the date wheel holder 2 while pushing the portion toward the main plate. Fig. 3 to further improve incorporation
As shown in (a), the protrusion 1a and the portion 2a of the date wheel presser that enters under the protrusion 1a make it easier for the date wheel presser 2 to enter, and
The date indicator retainer has a slope 1d for preventing scratches and scraping, and the date indicator retainer 2a is also inclined. This slope enables a smooth installation. The projection 1a of the base plate is provided with a slope 1e for preventing breakage due to stress concentration. These slopes are the same for the projections 1b and 1c of the other base plates. In the projections 1a and the like,
Has a hole. By using this hole, it is possible to confirm the assembled state of the date wheel holder.

Means for disassembling the date wheel holder 2 is shown in FIG.
This will be described with reference to FIG. For disassembly (removal), a jig 14 such as tweezers is inserted into the concave portion 1n of the main plate 1 and a spring portion 2g is provided on the 2h portion near the engaging portion of the date wheel holder 2 with the main plate dowel 11 with the 1s portion as a fulcrum. The jig 14 is moved to the position 14 'so as to be at the position 2g''which is off the dowel 11. Since the lifting force and the rotating force by the jig 14 act on the date indicator holder 2, when the engagement with the dowel 11 is released, the date indicator holder 2 rotates slightly on the opposite side of the assembling and rides on the dowel 11. Keep state. This operation is similarly performed for the other dowel 1m, so that the date wheel holder 2
Can be removed. In order to improve the removal workability, support marks 2u and 2v indicating the position where the date wheel holder 2 is lifted by the jig 14 and "UP" marks 2x and 2w indicating the lifting operation, and the date wheel when removing the date wheel 2 Arrow marks 2y and 2z indicating the rotation direction of the presser 2 are engraved to improve workability.

[0014]

As described above, the following effects can be obtained by employing the component fixing structure of the present invention.

First, the thin plate member can be easily fixed to the main plate simply by hooking the thin plate member on a projection or the like of the main plate. Therefore, the present invention is particularly useful in the case where the outer peripheral portion of the date wheel holder, which is a thin plate member, is covered with the date wheel and a conventional fixing structure using the side surface of the main plate cannot be used. In addition, since there is no need to use screws, etc. as compared to the conventional method, which does not have to be fixed by screwing, there is no need to reduce mechanical equipment and secure space for screws, pins, etc. by shortening the process of mechanical assembly. The degree of freedom in design and layout increases, and the degree of freedom in design increases.

Further, by providing the protruding portion so as to sandwich the thin plate member, the position of the thin plate member with respect to the base plate side is determined, and the amount of play of a component located between the base plate and the thin plate member can be appropriately maintained.

By providing the concave portion in the date indicator holder, the date indicator holder can be smoothly assembled by the jig.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a state before the date wheel retainer is assembled.

FIG. 3 is a sectional view showing an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a method of assembling the date wheel holder.

FIG. 5 is a sectional view showing a first conventional example.

[Explanation of symbols]

 1 ... ground plate 2 ... date wheel holder 3 ... date wheel 14 ... jig 15 ... jig

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Katsuyoshi Takizawa 1-8 Nakase, Mihama-ku, Chiba-shi, Chiba Seiko Instruments Co., Ltd. (56) References JP-U 4-36490 (JP, U) JP-U 4-36489 (JP, U) JP-A 62-124586 (JP, U) JP-A 55-172877 (JP, U) JP 50-5044 (JP, Y1) (58) Fields surveyed (Int. Cl. ^7, DB name) G04B 29/02 G04B 19/247 G01C 3/14

Claims (1)

(57) [Claims] 1. A thin plate member, and a base plate for fixing the thin plate member, wherein the base plate has a projection engaged with an upper surface of an edge of the thin plate member from above, and the thin plate member with respect to the projection. A protrusion that is disposed at a position adjacent to the near side in the introduction direction of the thin plate member and abuts against the plate surface of the thin plate member from below, and a regulating portion that regulates the planar position of the thin plate member engaged with the protrusion. The thin plate member is pressed down, so that the thin plate member can be engaged with the protrusion, and the thin plate member is planarly overlapped on the main plate while being pressed downward. And the thin plate member is engaged with the protruding portion, whereby the thin plate member is sandwiched from above and below by the protruding portion and the protruding portion to perform positioning in the thickness direction, and the thin plate member is fixed to the regulating portion. Positioned flat by Fixing structure watch parts, characterized in that it is configured to be.