JP3050788B2 - Clock body pointer correction mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for correcting a pointer of a timepiece, and more particularly, to a mechanism easily incorporated into a timepiece.

[0002]

2. Description of the Related Art Conventional types of pointer correction mechanisms include:
Some were shown in FIGS. 6 to 9. In the pointer correcting mechanism shown in FIGS. 6 and 7, a needle adjusting member 10 including a knob portion 2, a correction pinion 4, and a claw portion 8 provided on a shaft portion 6 between them is provided on a cover 12. It was press-fitted into the needle adjusting hole 14 from above (in the direction of the arrow shown in FIG. 7) (for example, Japanese Utility Model Publication No. 61-2943).
issue).

[0003] In addition, the pointer correction mechanism shown in FIG. 8 is provided with a separate knob portion 2 on a needle adjusting member 20 including a correction pinion 16 and a shaft portion 18 sandwiched between a cover 24 and a lower plate 26.
2 was attached by press fitting.

Further, in the pointer correcting mechanism shown in FIG. 9, a needle adjusting member 32 composed of a correcting pinion 28 and a shaft portion 30 is sandwiched between a cover 34 and a lower plate 36 similarly to the one shown in FIG. Things. In this pointer correcting mechanism, the end of the shaft portion 30 protruding from the needle adjusting hole 38 of the cover 34 is also used as a knob portion. I was

[0005]

In the pointer correcting mechanism shown in FIGS. 6 and 7, as shown in FIG. 7, a claw portion 8 having a diameter slightly larger than that of the needle adjusting hole 14 is press-fitted in the axial direction. Thus, the needle adjusting member 10 is attached to the needle adjusting hole 14. For this reason, the inner peripheral surface of the needle adjusting hole 14 may be deformed and turned in the press-fitting direction when the needle adjusting member 10 is press-fitted, and this portion may hinder the smooth rotation of the needle adjusting member 10. If the needle adjusting member 10 does not rotate smoothly in this way, in the pointer correcting mechanism having a structure that always meshes with the pointer driving mechanism, the needle adjusting member 10 becomes a load, which affects the driving of the pointer and the power of the pointer. This has led to increased consumption.

Further, in the pointer correcting mechanism shown in FIG. 8, since the needle adjusting member 20 and the knob portion 22 are provided separately, there is a problem that the number of parts increases.
The portion where the knob 22 is attached by press fitting may be loosened, and even if the knob 22 is turned, its rotational force is not transmitted to the shaft portion 18 and the pointer cannot be corrected.

Further, in the pointer correcting mechanism shown in FIG. 9, the diameter of the end portion of the shaft portion 30 as the knob must be smaller than that of the large diameter portion 40 for preventing detachment. Since the diameter of the portion 30 cannot be increased in relation to the size of the correction pinion 28, there has been a problem that it is difficult to rotate the knob portion.

The present invention has been made in view of the above-mentioned problems of the prior art, and its object is to prevent smooth rotation of the needle adjusting member, minimize the number of parts, and have excellent operability. To provide a pointer correction mechanism for a watch body.

[0009]

According to the present invention, there is provided a timepiece adjusting mechanism for a watch body, comprising a shaft, a knob provided at one end of the shaft, and a knob provided at the other end of the shaft. Before and between the knob and the corrected kana
A needle adjusting member having a protrusion having a diameter larger than the shaft portion, and a cover including a notch having an opening formed in an outer peripheral portion and having a needle adjusting hole adapted to the shaft portion of the needle adjusting member, A shaft portion of the needle adjusting member is inserted through an opening of the needle adjusting hole formed in an outer peripheral portion of the cover, and the cover is attached to a lower plate including a pointer driving mechanism. In addition, the pointer of the watch body of the present invention is modified.
The mechanism includes a shaft and a knob provided at one end of the shaft.
And a correction pin provided on the other end of the shaft.
Needle alignment member having an opening provided on the outer peripheral portion
A needle formed of a notch and adapted to the shaft of the needle adjusting member
A hole for alignment and a surface near the opening of the hole for needle alignment.
Between the knob portion of the needle adjusting member and the surface.
A projection with a projection that is slightly larger than the gap
And a bar formed on an outer peripheral portion of the cover.
From the opening of the needle adjusting hole, move the shaft of the needle adjusting member.
Insert the cover into the lower plate containing the pointer drive mechanism.
It is something to attach.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the timepiece pointer correcting mechanism of the present invention, a cover is provided with a needle adjusting hole formed of a notch having an opening at an outer peripheral portion thereof. The needle adjusting member is inserted into the needle adjusting hole of the cover from its opening, and is positioned at an appropriate position by sliding in the lateral direction. The needle adjusting member is provided with a protrusion that prevents the needle adjusting member from being pulled out from the needle adjusting hole in the axial direction.
Further, a projection is provided on the surface of the cover, and the knob portion of the needle adjusting member gets over the projection so that the needle adjusting member reaches an appropriate position. For this reason,
During assembly, it is possible to clearly determine whether or not the needle adjusting member has entered a proper position, and to prevent withdrawal. The opening of the needle adjusting hole is closed by attaching the cover to the lower plate. For this reason, there is no intrusion of dust, dirt, and the like.

[0011]

FIG. 1 is a partial sectional view showing a timepiece correcting mechanism according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.
In the figure, reference numeral 50 denotes a needle adjusting member, which is provided at a shaft portion 52, a disk-shaped knob portion 54 having an uneven surface provided at one end thereof, and provided at the other end of the shaft portion 52. And a projection 58 provided between the knob 54 and the correction pin 56 and having a diameter larger than that of the shaft 52. The needle adjusting member 50 in this embodiment is formed by integral molding of plastic or the like.

Reference numeral 60 denotes a plate-like cover, and 62 denotes a tray-like lower plate. By attaching the cover 60 to the opening 62a of the lower plate 62, a pointer driving mechanism 66 composed of a train of wheels or the like for driving the hands 63 is rotated. It is movably instructed and included. The cover 60 is provided with a needle adjusting hole 64 formed of a U-shaped notch having an opening 64a provided in an outer peripheral portion 60a. This needle alignment hole 64 is
It has an internal size and an internal shape that are compatible with the shaft portion 52 of the needle adjusting member 50. On the other hand, the lower plate 62 is provided with a shaft pin portion 68 that supports the needle adjusting member 50 rotatably in the axial direction.

Near the opening 64a of the needle alignment hole 64 on the surface of the cover 60, substantially hemispherical projections 70, 7 are provided.
2 is provided at a position sandwiching the needle alignment hole 64. The height of the projections 70 and 72 is set to be slightly larger than the gap between the surface of the cover 60 and the knob 54 of the needle adjusting member 50.

Further, the lower plate 62 which overlaps the needle adjusting hole 64
Is provided with a projecting portion 74 that projects to a position that at least partially overlaps the knob portion 54 when the needle adjusting member 50 is attached to the cover 60.

Next, a description will be given of the assembly of the pointer correcting mechanism of the present embodiment having the above-described configuration and the operation and operation of each part. First, in order to attach the needle adjusting member 50 to a predetermined position, as shown in FIG. 3, the shaft portion 52 of the needle adjusting member 50 is inserted through the opening 64a of the needle adjusting hole 64 of the cover 60, and the It is slid sideways without changing the direction and inserted into the hole 64 for needle alignment. At this time, the needle adjusting member 50 is slightly set without being pulled out in the axial direction (vertical direction in FIG. 3) since the knob portion 54 and the protruding portion 58 respectively contact the front and back surfaces of the cover 60. Only the play can move in the axial direction. For this reason, when inserting the needle adjusting member 50 into the needle adjusting hole 64, the knob portion 54 is
It is necessary to be once caught by the needles 0 and 72 and pushed into the needle adjusting hole 64 so as to get over the projections 70 and 72 by the elasticity of the needle adjusting member 50 and the play. As a result, even if the needle adjusting member 50 inserted into the needle adjusting hole 64 is moved in the direction of the opening 64a of the needle adjusting hole 64, the needle adjusting member 50 is not caught by the projections 70 and 72 and does not fall off.

Thereafter, the cover 60 is attached to the opening 6 of the lower plate 62.
2a. At this time, the shaft portion 68 of the lower plate 62 is
a and rotatably supported. Further, the overhang portion 74 of the lower plate 62 covers the opening 64a of the needle adjusting hole 64 and overlaps the knob portion 54 in a planar manner to prevent dust and dirt from entering from the outside.

As described above, the needle adjusting member 5 is positioned at an appropriate position.
When the zero is attached, the correction pinion 56 meshes with the minute wheel 76 of the pointer driving mechanism 66, and by rotating the needle adjusting member 50, the minute wheel 76 rotates and moves the hands 63 to correct. be able to.

In this embodiment, the needle adjusting hole 6 is used.
4, the width of the opening 64a may be slightly narrowed so as to prevent the needle aligning member 50 from dropping off when it is assembled, as shown in FIG. In this case, the projections 70 and 72 need not be formed on the surface of the cover 60. In addition, as shown in FIG.
a has an extremely narrow slit shape and the inside 64b
Can be formed into a circular shape to prevent it from falling off during assembly. However, in this case, it is necessary to set the shape of the shaft portion 52 of the needle adjusting member 50 to a substantially oval shape so that the shaft portion 52 can pass through the opening 64a only when turned in a predetermined direction. is there.

[0019]

According to the present invention, when the needle adjusting member is attached to the cover, it is not necessary to force the needle adjusting member into the cover, so that the inner peripheral portion of the needle adjusting hole is damaged and the needle adjusting member is smoothly rotated. Therefore, even if the correction pinion always meshes with the pointer driving mechanism, no excessive load is applied.

Further, since the overhanging portion of the lower plate covers the opening of the needle adjusting hole and overlaps the knob, it is possible to prevent dust and dirt from entering from outside.

Furthermore, there is no need to separate the knob part,
Since no other special parts are required, the number of parts can be minimized.

Furthermore, since the size of the knob portion is not limited, operability is not sacrificed.

Further, a protrusion is provided between the knob and the correction pin to prevent the needle adjusting member from being pulled out in the axial direction.
Further, by providing a projection near the opening of the needle adjusting hole or changing the width or shape of the opening, the needle adjusting member can be prevented from falling off during assembly, and the assembling work can be performed more easily. it can.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a timepiece hand correcting mechanism according to an embodiment of the present invention.

FIG. 2 is a plan view of a hand correcting mechanism of the timepiece shown in FIG. 1;

FIG. 3 is an exploded view showing a state when the needle adjusting member shown in FIG. 1 is attached to a cover.

FIG. 4 is a plan view showing a partially modified example of the needle adjusting hole shown in FIG. 2;

FIG. 5 is a plan view showing another partially modified example of the needle adjusting hole shown in FIG. 2;

FIG. 6 is a partial sectional view showing a conventional timepiece hand correcting mechanism.

FIG. 7 is a partial sectional view showing a state in which the needle adjusting member in the pointer correcting mechanism shown in FIG. 6 is pressed into the cover.

FIG. 8 is a partial sectional view showing a conventional timepiece hand correcting mechanism.

FIG. 9 is a partial cross-sectional view showing a conventional timepiece hand correcting mechanism.

[Explanation of symbols]

 50 Needle alignment member 52 Shaft 54 Knob 56 Modified pinion 58 Projection 60 Cover 62 Lower plate 64 Needle alignment hole 64a Opening 66 Pointer drive mechanism 68 Shaft pin 70, 72 Projection 74 Overhang

Claims (2)

(57) [Claims] 1. A shaft, a knob provided at one end of the shaft, a correction pin provided at the other end of the shaft, and a knob formed between the knob and the correction pin. Formed between
A needle adjusting member having a projection having a diameter larger than the shaft portion; and a cover having a notch having an opening formed in an outer peripheral portion and having a needle adjusting hole adapted to the shaft portion of the needle adjusting member. The shaft portion of the needle adjusting member is inserted from an opening of the needle adjusting hole formed on the outer peripheral portion of the cover, and the cover is attached to a lower plate including a pointer driving mechanism. Watch body pointer correction mechanism. 2. A shaft, and a shaft provided at one end of the shaft.
Knob and a correction provided on the other end of the shaft
A needle adjusting member having a pinion, and a notch provided with an opening in an outer peripheral portion;
Needle alignment hole that fits the shaft of the
A needle alignment portion provided on the surface near the opening of the tool hole;
Less than the gap created between the knob of the material and the surface
A cover having a crab-shaped projection, and opening the needle adjusting hole formed in the outer peripheral portion of the cover.
Insert the shaft of the needle adjusting member from the mouth, and
Is attached to the lower plate containing the pointer drive mechanism.
Watch body of guidelines correction mechanism to be.