JP2521327Y2 - Wheel structure of pointer display type electronic timepiece - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a timepiece movement structure,
More specifically, the present invention relates to the improvement of the train wheel assembly structure.

[Conventional technology]

Generally, in a pointer-display type electronic wristwatch that is required to be low in cost, the ground plate and the back plate are made of relatively thin flat plate members for the purpose of rationalization by reducing the number of processing steps, and several of these are planted on the ground plate. It is structured such that the wheel trains for driving the pointer are arranged in the hollow portion in cross section, which are connected by the space maintaining columns.

Further, between the base plate and the receiving plate, there is arranged an intermediate receiving member configured to insulate the battery, support the circuit board, and further, a metal receiving member for receiving one handle of the train wheel and a plastic spacer.

2. Description of the Related Art In recent years, multi-functions and multi-needle have been advanced, and a train wheel structure in which many train wheels are arranged on not only one surface of the main plate but also both surfaces has been adopted. In this case, the receiving members are arranged on both sides of the main plate.

The wheel train structure of a conventional timepiece will be described below with reference to the drawings.

FIG. 5 is a sectional view of an essential part showing a conventional timepiece structure.
In FIG. 5, the center bridge 2 and the main plate 3 are arranged between the train wheel bridge 1 and the lower bridge 4, the fourth wheel 6 is the center pipe 7 of the middle bridge 2 and the main plate 3, and the third wheel 5 is It is supported by the middle bridge 2 and the lower bridge 4.

In particular, in the third wheel & pinion 5, the upper handle 5a is pivotally supported by the bearing portion 2a of the center bridge 2, and the lower handle 5b penetrates the main plate 3 to provide the bearing portion of the lower carrier 4.
It is pivotally supported by 4a.

In such a procedure of assembling the train wheel in the timepiece structure, the components arranged on the upper surface of the main plate 3 are assembled first. That is, a step motor (not shown), which is an important component of the timepiece, and main wheel trains such as the third wheel 5 and the fourth wheel 6 are arranged in this portion. And middle reception 2,
After the train wheel bridge 1 is installed, it is reversed and the center wheel 7 is installed in the center pipe 7 on the lower surface of the main plate 3. Finally, the lower handle 5b of the third wheel & pinion 5 is pivotally supported by the bearing 4a of the lower bearing 4 to fit the hour wheel 9 into the second wheel & pinion 8 for completion.

By assembling the lower support 4 after the middle support 2 as described above, the assembling work can be performed smoothly.

[Problems to be solved by the device]

However, in the process of assembling a wristwatch having such a movement structure, when the third wheel & pinion 5 in FIG. 5 is assembled, there are the following problems.

This will be described with reference to FIGS. 6 and 7 showing the model thereof. As shown in FIG. 6, the third wheel & pinion 5 is first set through the hole 10 of the main plate 3. At this time, the upper handle 5a and the lower handle 5b of the third wheel & pinion 5 are each in a free state, and the third wheel & pinion 5 is in a state of freely moving in the hole 10 of the main plate 3.

Therefore, as shown in FIG. 7, when the upper handle 5a of the third wheel & pinion 5 is to be incorporated into the shaft 2a of the center bridge 2, the train wheel 5 is not fixed in its fixed position, so that it is within the clearance range of the hole 10. Will be displaced in the plane direction. Therefore, in this case, the upper handle 5a and the bearing 2a are
Cannot be installed due to misalignment. When trying to assemble it hard, something like the damage of the upper handle 5a is likely to occur, and it is particularly difficult to fit many wheel trains into the bearing holes at the same time, which is troublesome in the assembly work.

An object of the present invention is to solve these problems and to provide an optimum wheel train assembly structure in which the wheel train can be easily set to an appropriate arrangement.

[Means for solving the problem]

The structure of the present invention for achieving the above-mentioned object is a base plate which is a base of a timepiece movement, a receiving member vertically arranged with the base plate interposed therebetween, and a pointer which is axially supported between the main plate and the receiving member. In a wheel train structure of a pointer display type electronic timepiece including a pointer wheel train for driving a wheel, a synthetic resin member is disposed in a hollow section of the main plate and the upper receiving member, and the main plate or the synthetic resin member At least one of the wheel insert holes is formed through at least one of the upper and lower receiving members that form the pointer wheel train, and the shaft portion of the wheel & pinion is pierced through, and at least the shaft portion or the edge of the wheel insert hole. A slope portion is provided on one side, and at the stage of assembling the main plate and the upper receiving member, the wheel & pinion not supported by the lower hook is supported by contacting the wheel & pin insertion hole, and the slope wheel portion inserts the wheel & pinion. To be centered in the hole Characterized in that the configuration was.

〔Example〕

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

FIG. 1 is a sectional view of an essential part showing a timepiece movement structure of the present invention.

In FIG. 1, 14 is a main plate which is the base of the timepiece movement. A train wheel bridge 11 and a lower bridge 15, which are receiving members, are arranged above and below the main plate 14, and these receiving members are bearings 11a, 11b and 15 respectively.
It has a and 15b, and axially supports a rotor 16 which constitutes a step motor and an intermediate wheel 17 which is a wheel and wheel constituted by a pointer wheel train. A spacer 12 which is a synthetic resin member is arranged around the pointer wheel train in the hollow section which is formed by the main plate 14 and the train wheel bridge 11. A display wheel 20 to which a pointer (not shown) is fixed is pivotally supported by a main plate 14 and a lower support 15, and the display wheel 20 and the intermediate wheel 17 on the lower support 15 side with respect to the main plate 14 have a wheel train support 11 On the side, the intermediate wheel 17 and the rotor 16 mesh with each other in cross section, and the pointer is driven. Therefore, in order to penetrate the shaft of the intermediate wheel 17, the spacer 12 is formed with a wheel insertion hole 12b, and the main plate 14 is formed with a wheel insertion hole 14b.

The spacer 12 has a through hole 12a so that the shaft of the rotor 16 can be extended from the train wheel bridge 11 side to the lower bridge 15 side.
The yoke support 13 has a through hole 13a, and the main plate 14 has a through hole 14a.
have. Yoke forming the step motor
A yoke support 13 formed of a thin flat plate is placed on the upper surface side of the main plate 14 in order to set the height position of 19 and the yoke is placed on the yoke support base 13.
A yoke support plate 18 and a yoke support plate 18 are stacked.

Structurally, the order of assembly is that the yoke support 13 and
The yoke 19, the yoke support 18, and the spacer 12 are stacked and assembled, and then the rotor 16 is inserted and set through the through hole 12a and the intermediate wheel 17 is set through the through hole 12b.

At this time, the rotor seat edge portion 16c of the rotor 16 contacts the sloped portion of the through hole 13a of the yoke support 13, and the sloped portion 17c formed on the shaft portion of the intermediate wheel 17 serves as the wheel insert hole 12b of the spacer 12. The correct arrangement position is determined by the action of each slope by contacting the slope 12c. The upper handle 16a of the rotor 16 and the upper handle 17a of the intermediate wheel 17 are axially supported by the bearings 11a and 11b of the train wheel bridge 11, respectively.

Next, FIGS. 2 and 3 showing a model of the embodiment of the present invention.
In the figure, the train wheel bridge 11 is installed after the intermediate wheel 17 is installed.
The built-in state up to mounting is explained. The intermediate car 17
The lower part of the gear has a sloped part 17c formed in a build-up shape with almost the same inclination as the sloped part 12c provided at the hole edge of the through hole 12b of the spacer 12. As is apparent from FIG. 1, the sloped portion 17c of the intermediate wheel 17 is disposed above the center of gravity of the intermediate wheel 17 itself (corresponding to the substantially intermediate position of the cross-sectional intermediate portion formed by the main plate 14 and the train wheel bridge 11). Has been done. Intermediate car 17 as shown in FIG.
When mounted on the slope 12c of the hole edge of the spacer 12 from the train wheel bridge 11 side, the intermediate wheel 17 is driven by its own weight and center of gravity position.
The slope portion 17c of 17 and the hole edge slope portion 12c of the spacer 12 are regulated in a substantially planar cross section to maintain a static stable state.

Then, as shown in FIG. 3, the wheel train bridge 11 is incorporated, and the upper handle 17a and the lower handle 17b of the intermediate wheel 17 which are previously set are centered while being in the free state, respectively. 11
It can be easily assembled by adding a little vibration to.

When each train wheel is assembled on the upper surface of the main plate 14 in this manner, the timepiece movement is reversed, and after the parts such as the display wheel 20 between the main plate 14 and the lower support 15 are arranged, the bearing 15a of the lower support 15 is placed.
The lower handle 16b of the rotor 16 is also the lower handle of the intermediate car 17 on the bearing 15b.
17b is inserted respectively.

In addition, in the present embodiment, the configuration in which the wheel train and the through hole are both provided with slopes like the intermediate wheel 17 and the configuration in which only the through holes are provided as the rotor 16 is described. As shown in the figure, a configuration may be adopted in which only the shaft portion of the train wheel is provided with the inclined surface.
Particularly, if the intermediate wheels 17 and the spacers 12 shown in FIG. 1 are configured to have slopes, the correct position of the intermediate wheels 17 can be set most reliably. In addition, spacer
It goes without saying that the present invention can be applied to a main plate in which 12 and the main plate 14 are integrally formed.

[Effect of device]

As is apparent from the above description, according to the present invention, in the pointer display type electronic wristwatch whose cost is reduced, particularly in the multi-hand and multi-function timepiece, the main plate and the spacer which are the intermediate members sandwiched between the upper and lower receiving members are The notch, the through hole, or the shaft that the train wheel contacts with the insertion hole of the notch or the through hole has a sloped surface, so that the timepiece movement can be easily assembled. It can be realized,
Improvements in assembly quality can also be realized.

Further, conventionally, when the wheel train bridge was assembled, the upper handle of the wheel train was squeezed with tweezers or a counterbore, which caused the handle to bend or be slightly scratched. By doing so, these can also be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 and FIG. 3 are sectional views showing an embodiment of the present invention as a model, and FIG. 5 is a cross-sectional view showing the structure of the present invention, FIG. 5 is a cross-sectional view showing a conventional example of the present invention, and FIG.
FIG. 7 is a cross-sectional view showing a model of the conventional example of the present invention. 1 ... Wheel train bridge, 2 ... Middle bridge, 3 ... Main plate, 4 ... Undercarriage,
5 …… 3rd wheel, 6 …… 4th wheel, 11 …… wheel train bridge, 12 …… spacer, 13 …… yoke support, 14 …… ground plate, 15 …… understanding, 16 …… rotor, 17 …… Intermediate car, 20 …… Display car.

Claims (1)

(57) [Scope of utility model registration request] 1. A main plate which is a base of a timepiece movement, a receiving member arranged vertically with the main plate sandwiched therebetween, and a pointer wheel train which is pivotally supported between the main plate and the receiving member to drive a pointer. In the wheel train structure of the pointer indicating type electronic timepiece, a synthetic resin member is disposed in a hollow section of the main plate and the upper receiving member, and the pointer wheel train is provided on at least one of the main plate and the synthetic resin member. A dial wheel insertion hole is formed to penetrate the shaft portion of the wheel & pinion supported by the upper and lower receiving members, and a slope portion is provided on at least one of the hole edge of the wheel & pinion insertion hole and the shaft portion. In the step of assembling the upper receiving member and the upper receiving member, the wheel and pinion not supporting the lower hook is supported in the wheel and wheel insertion hole, and is configured to be moved to the center of the wheel and wheel insertion hole by the slope portion. Table of characteristic guidelines Train wheel structure of Formula electronic watch.