JP2899968B1 - Chronograph wheel train structure - Google Patents

Abstract

[PROBLEMS] To easily assemble even when a chronograph mechanism is added to an existing movement. The chronograph second hand shaft (3) has teeth (31) that mesh with a gear (42) of a third wheel & pinion (4). These teeth are substantially the same as the pinion 51 of the fourth wheel & pinion 5. The diameter of the collar 31 is substantially the same as the pinion 51 of the fourth wheel & pinion 5. In this way, since the collar 31 of the chronograph second hand shaft 3 can pass through the gear wheel 42 of the third wheel & pinion 4, the chronograph wheel 700 can be easily assembled without interfering with the third wheel & pinion 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chronograph wheel train structure, and more particularly, to a chronograph wheel train structure which is easy to assemble even when an existing movement is diverted and a chronograph mechanism is additionally constructed.

[0002]

FIG. 4 shows a conventional chronograph wheel train 500.
FIG. The other parts of the chronograph timepiece are well known to those skilled in the art, and thus description and illustration thereof are omitted here. The first barrel gear 19 of the barrel wheel meshes with the kana 21 of the second wheel & pinion 2. The second wheel & pinion 2 is pivotally supported between the main plate 11 and the second wheel bridge 12, and a chronograph second hand shaft 503 penetrates the center thereof with a gap. The chronograph second hand shaft 503 is axially supported by the collar 531 and the second bridge 12. The end of the chronograph second hand shaft 503 is supported by a ball bearing shaft 13. The gear 22 of the second wheel & pinion 2 meshes with the kana 41 of the third wheel & pinion 4. The third wheel & pinion 4 is pivotally supported between the third wheel & pinion support 14 and the main plate 11. The gear 42 of the third wheel & pinion 4 meshes with the pinion 51 of the fourth wheel & pinion 5. The pinion 51 of the fourth wheel & pinion 5 is axially supported by a collar 531 of the chronograph second hand shaft 503, and slides on the chronograph second hand shaft 503 as an axis.

The chronograph wheel 700 has a spring member 6 and a clutch ring 9. Above the fourth wheel 5, a clutch ring 9 and a spring member 6 are arranged. The chronograph wheel 700 is connected to the fourth wheel 5 via the clutch ring 9 by frictional force obtained by the urging force of the spring member 6. When the chronograph is stopped, the clutch ring 9 is lifted by being sandwiched between the first start / stop lever 9A and the second start / stop lever 9B, so that the chronograph wheel 700 does not rotate. At this time, since the clutch ring 9 and the fourth gear 52 are separated from each other, the rotation transmission from the fourth wheel 5 is interrupted. During the chronograph operation, since the first start / stop lever 9A and the second start / stop lever 9B are separated from the clutch ring 9, the clutch ring 9 and the fourth wheel 5 do not slip, and the rotation of the fourth wheel 5 is changed to the chronograph. It is transmitted to the car 700.

[0004]

However, in the conventional chronograph wheel train 500 described above, when an attempt is made to add a chronograph wheel train to an existing movement, the collar 531 of the chronograph second hand shaft 503 is mounted on the third wheel & pinion 4. There was a problem that it could not be incorporated because it interfered with the gear 42.

More specifically, as shown in FIG. 5, in the existing middle three-handed movement, the second hand shaft 603 is connected to a fourth wheel & pinion 605.
The fourth wheel 605's kana 651 is the third wheel 4
Gear 42. The kana 651 is directly supported in the axial direction by the second pin 12. Thus, in the middle three-hand watch, the kana 651 is the gear 42 of the third wheel & pinion 4.
Therefore, the fourth wheel & pinion 605 can be mounted even after the third wheel & pinion 4 is mounted.
However, when an existing movement is used to additionally construct a chronograph mechanism, the second is displayed by a small second hand (not shown), and the second hand axis 603 becomes a chronograph second hand axis (reference numeral 503 in FIG. 4). Therefore, as shown in FIG. 4, it is necessary to make the fourth wheel 5 and the chronograph second hand shaft 503 slidable. For this reason, the collar 531 that receives the pinion 51 of the fourth wheel 5 is moved to the chronograph second hand shaft 503.
It is necessary to provide. Spit 531 enough to receive Kana 51
Is provided, when the third wheel & pinion 4 is assembled, the gear 42 and the collar 531 of the third wheel & pinion 4 interfere with each other and cannot be assembled.
Or, it becomes very difficult to incorporate.

Accordingly, the present invention has been made in view of the above, and an object of the present invention is to provide a chronograph wheel train structure which is easy to assemble even when a chronograph mechanism is added to an existing movement.

[0007]

In order to achieve the above-mentioned object, a chronograph wheel train structure according to claim 1 is characterized in that a pinion of a fourth wheel supported by a chronograph second hand shaft is mounted on the chronograph second hand shaft. It has a collar that supports in the axial direction, and the collar is provided with a cutout that allows the teeth of the third wheel to pass in the axial direction.

In this way, if the teeth of the third wheel are passed through the notches, the chronograph second hand shaft of the chronograph wheel may interfere with the third wheel gear even after the third wheel is assembled. It can be assembled without.

The chronograph wheel train structure according to a second aspect of the present invention includes a third wheel which is supported separately from the chronograph second hand shaft and meshes with a fourth wheel, and a fourth wheel which is supported by the chronograph second hand shaft. A center wheel, a brim provided on the chronograph second hand shaft and slidably in contact with the kana to axially support the fourth wheel, and friction supported by the chronograph second hand shaft and obtained by the urging force of a spring member A chronograph wheel train structure comprising: a chronograph wheel that is coupled to the fourth wheel via force; wherein the collar is provided with a cutout portion through which the teeth of the third wheel pass in the axial direction. It is.

[0010] In this way, if the chronograph wheel is mounted so that the teeth of the third wheel pass through the notches, the third wheel can easily be assembled without interfering with the third wheel.

A third chronograph wheel train structure according to a third aspect of the present invention is a chronograph wheel train structure, wherein the third wheel is supported separately from the second chronograph second hand shaft and meshes with the pinion of a fourth wheel, and the fourth wheel is supported by the chronograph second hand shaft. A center wheel, a brim provided on the chronograph second hand shaft and slidably in contact with the kana to axially support the fourth wheel, and friction supported by the chronograph second hand shaft and obtained by the urging force of a spring member And a chronograph wheel train structure that is coupled to the fourth wheel via a force, wherein the collar is provided with substantially the same teeth as the fourth wheel.

By providing substantially the same teeth as the fourth pinion on the collar, the collar can pass through the gear of the third wheel. Therefore, the chronograph wheel can be assembled without interfering with the third wheel.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. The present invention is not limited by the embodiment. FIG. 1 is a sectional view showing a chronograph wheel train 100 of the present invention. The other parts of the chronograph timepiece are well known to those skilled in the art, and thus description and illustration thereof are omitted here. The barrel gear 19 of the barrel wheel 1 meshes with the kana 21 of the center wheel & pinion 2.
The second wheel & pinion 2 is pivotally supported between the main plate 11 and the second wheel bridge 12,
A chronograph second hand shaft 3 penetrates the center thereof with a gap. The chronograph second hand shaft 3 is axially supported by the collar 31 and the second bridge 12. The end of the chronograph second hand shaft 3 is supported by a ball bearing shaft 13. The gear 22 of the second wheel & pinion 2 meshes with the kana 41 of the third wheel & pinion 4. The third wheel 4 is composed of the third wheel receiver 14 and the main plate 1
1 is supported. The gear 42 of the third wheel & pinion 4 meshes with the pinion 51 of the fourth wheel & pinion 5. Kana 51 of the fourth car 5
The chronograph second hand shaft 3 is axially supported by the collar 31 and is slidably rotated about the chronograph second hand shaft 3.

As shown in FIG. 2, the collar 31 is provided with teeth 32 which mesh with a gear 42 of the third wheel & pinion 4.
The teeth 32 are substantially the same as the pinions 51 of the fourth wheel & pinion 5.
The teeth are split in the same manner as a normal kana using a hobbing machine. Tooth 3
2 may be provided on the entire flange 31 or on a part thereof. The diameter of the collar 31 is substantially the same as the pinion 51 of the fourth wheel & pinion 5. In addition, as shown in FIG.
Notch 33 for avoiding interference with the air conditioner may be provided.

Returning to FIG. 1, the chronograph wheel 700 has a spring member 6 and a clutch ring 9. Above the fourth wheel 5, a clutch ring 9 and a spring member 6 are arranged.
The chronograph wheel 700 is connected to the fourth wheel 5 via the clutch ring 9 by frictional force obtained by the urging force of the spring member 6. Clutch ring 9
When the chronograph is stopped, the chronograph wheel 700 does not rotate because it is lifted by being pinched from both sides by the first start / stop lever 9A and the second start / stop lever 9B. At this time, since the clutch ring 9 and the fourth gear 52 are separated,
The rotation transmission from the fourth wheel 5 is cut off. During the chronograph operation, since the first start / stop lever 9A and the second start / stop lever 9B are separated from the clutch ring 9, the clutch ring 9
And the fourth wheel 5 do not slip and the rotation of the fourth wheel 5 is transmitted to the chronograph wheel 700.

Next, the assembly of the fourth wheel 5 will be described. The second wheelchair 12 is attached while the second wheel & pinion 2 is supported by the main plate 11, and the second wheel & pinion 2 is positioned. Next, the third wheel & pinion 4 meshes with the second wheel & pinion 2 and is supported by the main plate 11. Then, the third wheel 14 is attached to the third wheel 4
Position. Next, the chronograph wheel 700 is attached. In the configuration of the chronograph wheel 700, first, the fourth wheel & pinion 5 is attached to the chronograph second hand shaft 3. The chronograph second hand shaft 3 and the fourth wheel 5 can slide and rotate. Subsequently, the clutch ring 9, the spring member 6, and the heart cam 8 are attached. The chronograph wheel 700 is inserted into the second wheel & pinion 2. Since the teeth 31 of the fourth wheel 5 have substantially the same teeth as the pinions 51 of the fourth wheel 5, the flange 31 can pass through without interfering with the gear 42 of the third wheel 4. The chronograph wheel 700 is axially supported by the second bridge 12. Subsequently, the chronograph wheel 700 is positioned and supported by the chronograph receiver 15.

As described above, according to the chronograph train wheel of the present invention, even when a chronograph mechanism is constructed by utilizing an existing movement, the chronograph second hand shaft 3 is not assembled at the time of assembly.
Since the collar 31 does not interfere with the gear wheel 42 of the third wheel & pinion 4, assembly is easy.

[0018]

As described above, according to the chronograph wheel train structure of the present invention (claim 1), the pinion of the fourth wheel supported by the chronograph second hand shaft is set in the axial direction of the chronograph second hand shaft. With a notch that allows the teeth of the third wheel to pass in the axial direction, the chronograph wheel interferes with the third wheel gear even after the third wheel is assembled. It can be easily assembled without performing.

According to the chronograph wheel train structure of the next invention (claim 2), the notch portion through which the teeth of the third wheel and the third wheel pass in the axial direction is provided in the brim of the chronograph second hand shaft. If the chronograph wheel is mounted so that the teeth of the wheel pass through the notches, the wheel can be easily mounted without interfering with the third wheel.

According to the chronograph wheel train structure of the next invention (claim 3), the collar of the chronograph second hand shaft is provided with substantially the same teeth as the fourth wheel pinion, so that the collar of the third wheel is used. Can pass through gears. Therefore, the chronograph wheel can be easily assembled without interfering with the third wheel.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a chronograph wheel train according to the present invention.

FIG. 2 is an explanatory diagram showing a shape of a collar of a chronograph second hand shaft shown in FIG. 1;

FIG. 3 is an explanatory view showing a modification of the collar of the chronograph second hand axis.

FIG. 4 is a sectional view showing a conventional chronograph wheel train.

FIG. 5 is a sectional view showing a wheel train of the middle three-hand watch.

FIG. 6 is a sectional view showing a chronograph wheel according to the present invention.

FIG. 7 is a sectional view showing the operation of the chronograph wheel and the start / stop lever of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 chronograph wheel train 1 barrel wheel 2 second wheel 3 chronograph second hand shaft 31 brim 32 teeth 33 cutout 4 third wheel 5 fourth wheel 51 kana 6 spring member 700 chronograph wheel 7 chronograph gear 8 heart cam 9 clutch ring 9A First start / stop lever 9B Second start / stop lever

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) G04F 7/00-13/06 G04B 1/00-49/04

Claims (3)

(57) [Claims] 1. A collar for supporting a pinion of a fourth wheel supported by a chronograph second hand shaft in the axial direction of the chronograph second hand shaft, through which teeth of a third wheel can pass in the axial direction. A chronograph wheel train structure having a notch. 2. A third wheel which is supported separately from the chronograph second hand shaft and meshes with a fourth wheel, a fourth wheel supported by the chronograph second hand shaft, and provided on the chronograph second hand shaft. And a collar that slides in contact with the kana and supports the fourth wheel in the axial direction, and is coupled to the fourth wheel via a frictional force supported by the chronograph second hand shaft and obtained by the urging force of a spring member. A chronograph wheel train structure comprising: a chronograph wheel train structure, wherein the collar is provided with a cutout portion through which teeth of the third wheel pass in the axial direction. 3. A third wheel supported separately from the chronograph second hand shaft and meshing with a fourth wheel, a fourth wheel supported by the chronograph second hand shaft, and provided on the chronograph second hand shaft. And a collar that slides in contact with the kana and supports the fourth wheel in the axial direction, and is coupled to the fourth wheel via a frictional force supported by the chronograph second hand shaft and obtained by the urging force of a spring member. A chronograph wheel train structure comprising: a chronograph wheel train, wherein the collar is provided with substantially the same teeth as the fourth wheel pinion.