JPS584790B2 - Tokeimu - Bumentoutenbuuke - Kankiyusinkumibu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an Obu Uke-ichi adjustment hand assembly for a timepiece movement to be incorporated into a timepiece movement, and more particularly to a watch movement having a simplified structure.

Therefore, the aim is to assemble as few parts as possible, so that the assembly has the precision necessary for its operating functional characteristics, and to quickly and efficiently produce the necessary parts for use.

Attempts have already been made to produce a simple structure of the speed and speed needle assembly.

BACKGROUND OF THE INVENTION Such needles are known in which two adjacent parts of the bending arm form a U-shaped leg and consist of a stamped metal plate with said bending arm acting as a bar and bar of the needle.

The outermost bend of the hairspring is guided between two U-shaped legs.

Obu holders are also known which have a transverse bending element lying parallel to the element of the obu axis and which element acts as a hook suspension for the last outer bend end of the hairspring.

However, the adjustment hand of a clock movement, especially the adjustment hand of a wristwatch, is generally rotatably mounted on the truncated conical transverse surface of the Obu-end stone.

The latter part is a disc-like plate on which is mounted a bearing element that supports the end of the balance stem.

It is attached to the Obu-uke with two screws.

In other designs, where the bearing that receives the end of the balance is a damper bearing, the bearing block is mounted on the bearing housing and a portion of the housing is driven into the opening of the holder.

This bearing housing is bolted and has a frusto-conical bearing surface on its peripheral edge that extends beyond the surface of the Oburake, at the location of said frusto-conical surface on which the adjustment needle is pivoted. be.

Clock movements are also known in which the adjustment hand rests on a generally circular protrusion stamped and cut within the holder.

Finally, the adjustment needle may be pivoted at a cut-off bearing body that is screwed into the holder and supports one end of the balance stem.

All of the above-mentioned adjustment assemblies require extensive matching during manufacture and consist of at least one element of a bearing or bearing housing that requires one or more screws for its attachment. ing.

In this way, it would be desirable to be able to manufacture not only the adjustment needle but also the Oburake by punching and bending only from a flat metal plate.

In fact, this type design not only simplifies the manufacture of the adjustment needle and Oburake, but also requires a minimum of different operations to install the assembly.

It is therefore an object of the invention to provide the above-mentioned advantages.

For this reason, in the assembly according to the present invention, the hairspring, the hair holder, the hair holder and the hair rod for the speed and speed needle, and the means for pivotally supporting the speed and speed needle are comprised of the arm support and the speed and speed needle.

Preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.

The drawing shows a simplified clock movement section.

The main plate 1 supports the Tenfu-uke 2 by two pillars that are integrated with the main plate 1.

The Oburake 2 is attached to the pillar with screws 3.

In the coaxial opening, the balance arm 2 and the main plate 1 are supported by a balance stem 5 with a bearing 4 pivotally supported between them.

Fitted into the balance stem 5 is a punched disc 6 that constitutes the edge of the blade, the arm and the hub, and is equipped with a roller pin 7 to support it.

The balance spring 5 also supports a hair bead 8 to which the inner end of the balance spring 9 is attached.

The concave 10 and roller pin 1 cut parallel to the axis in the cylindrical collar of the balance stem 5 are the main body punched out of a flat metal plate, which is pivotally supported between the main plate 2 and the main plate 1. It cooperates with the pallet wheel 11 which is driven onto the pallet 12.

A schematic diagram of the Oburake 2 is shown in FIG.

As already mentioned above, the dowel support 2 ensures the pivoting of the dowel and the pallet, the radius of the edge 6 of the dowel being smaller than the distance between the dowel and the radius of the pallet.

The holder 2 is slightly bent downwards and has a first protrusion 13 which serves to support a sliding round wheel (not shown).

The second protrusion 14 is provided with a notch 15 which serves to hold a stem kettle (not shown) in position.

A bearing 4, on which the upper end of the balance stem 5 is pivotally supported, is fixed in a circular opening 16 punched out in the main support 2.

Around this opening, the arc-shaped portion 18 at the end of the Tenfu-uke 2 defines an angle of slightly more than 180°, and the arc-shaped inner end 19 of the opening 32 punched in the Tenfu-uke 2 defines an angle of about 60°. A circular area 11 extends for the other part covering.

This opening 32 is defined by an outer end 28 having an arcuate shape with its center above the bearing 4 and two radial ends.

The arc-shaped ends 1B, 19 are pivoted so that the adjustment needle 20 is supported.
It cooperates with the elements of the accelerating needle 20.

It is preferable that the adjustment needle 20 is made of a metal plate or steel and is completely formed by punching like the Oburake 2.

It is generally circular in shape and has a radially extending transverse protrusion 21, the ends of which, as shown in FIG.
Bend it into a U-shape, and the two legs of this U-shape are the hairspring 9.
extending on each side of the outermost bend.

The accelerating needle 20 also has a contoured central opening, the outer contour of which defines three V-shaped inner protrusions 22, 23, 24, and between the three protrusions three straight side protrusions. radial protrusion 25,
There is 26.27.

As shown in FIG. 2, the v-shaped projections 22, 23.
24 extends in the plane of the adjustment needle 20, and has protrusions 25 and 26.
．． 27 is bent downward at an angle of about 60 degrees.

The projection engages under the balance holder 2 on the opposite side of the arcuate portion 18, 19, and the projections 22, 23, 24 rest on the circular area 17.

The thickness of the punched metal plate and the bent angles of the protrusions 25, 26, and 27 in order to ensure the engagement of the adjustment needle 20 are as follows.
The radius vector of the inner ridge line at the end of the protrusion is circular arc 18.1
The radius vector of the outer ridge line at the end of the projection is longer than the radius of the arcs 18 and 19.

In this way, when the adjustment needle 20 is placed horizontally on the Oburake 2, the inclination of the projections 25, 26, 21 is
8.19 end, said protrusion is slightly elastically deformed outwards so that the inner ridge line of its end engages on the end of the arcs 18, 19. and flat protrusion 2
2, 23, and 24 are arranged to be in contact with the upper surface of the Tenfu-uke 2.

Due to the elastic deformation, the protrusions 2526.27 are punched out symmetrically and with the same dimensions and keep the accelerating needle 20 centered.

This shape allows the adjustment needle 20 to engage on the Oburake 2.

The peripheral edge of the adjustment needle 20 is circular, the radius of which is only slightly smaller than the radius of the arc that outlines the outside of the opening 32 made in the oburake 2 for the engagement of the protrusion 26.

The protrusion 21, whose U-shaped curved end forms an element that acts as a bar and bar for the needle, has an enlarged plate as shown in FIG.
can rotate at the axis of Obu.

A simple stamped and folded plate thus provides a part that exhibits all the necessary elements for performing the function of a speeding needle.

The distance between the two legs of the U-shape formed by the protrusion 21 after being bent and removed is adjusted so that the hairspring 9 moves a desired amount between the two legs.

As shown in FIG. 1, the last bent portion of the hairspring 9 that is engaged between the two arms of the protrusion 21 is
Double bend 29 formed at the last bend of hairspring 9
It is a circular part coaxial with Obu, which is limited to the inside by.

The end of this final bend is attached to an element that acts as a hairspring retainer.

This element is also integrated with Oburuke 2.

Then, the L-shaped protrusion 30 is punched out together with the Oburake 2.

This protrusion 30 is bent about halfway above the L-shaped upright leg, and the lower part of this upright leg and the L-shaped horizontal leg extend in a plane parallel to the balance bar.

The plane is also essentially radial with respect to the balance stem.

The L-shaped horizontal leg has a notch 31 as shown in FIG.
The outermost bent end of the balance spring 9 is engaged in the spring.

The end of the balance spring is glued or soldered to the protrusion 30.

As shown in FIG.
It rests on the end of the upright leg, and is glued or soldered to the protrusion.

As a variant, the width of the vertically bent protrusion 30 can be reduced by its substrate, and this design reduces the dimensions of the bent part 29 and reduces the thickness of the outermost bent part of the hairspring 9. The final section can be close to other curved sections.

Another variant to mention is that the bottom of the cutout 31 is sloped instead of consisting of vertical and horizontal walls.

In this way, the Oburuke 1 adjustment needle assemblage consists of two metal plates, one of which forms the OBU uke, and which is preferably made of brass or nickel silver, and the other of which is preferably made of steel. It has been described in detail as a set part, which has a very simple structure because it is completely simply formed so as to constitute.

These two flat metal plates are stamped and bent according to a carefully designed profile.

Next, the upper bearing of the OBU is engaged with the opening of the OBU holder 2, and the three diagonally bent protrusions are engaged so that the adjustment needle 20 is attached to that position.

During assembly, the final bending part of the hairspring 9 is connected to the protrusion 2.
The end of the hairspring 9 is engaged within the notch 31 of the protrusion 30.

For example, the hairspring is glued to the end of the upright leg of the protrusion 30,
Or soldered.

Thanks to the three protrusions 25, 26, 27, the adjustment needle 20 is held in the center and placed at its axis in the shape of a circular part within the obura receiver 2 at an angle equal to the angle of the opening 32. Rotate with.

The angle is about 60°, which is equivalent to what is required in practice.

As shown in FIG. 1, three protrusions 25, 26,
21 are placed at an angle of 120° from each other, and three protrusions 22.
It is not absolutely essential that 23.24 be the same.

In the embodiment shown in the figures, the projections 24 are shorter than the projections 22, 23, and the projections 25, 27 are shorter than the projections 22, 23.
5,26 or 26,27.

However, the detailed design ensures the guidance and positioning of the adjustment needle 20, which guidance is such that the displacement of the protrusion 21 is sufficiently precise to ensure a gradual modification of the frequency of the resonant assembly.

By thus displacing the speed and speed hand 20 on its axis, the adjustment of the watch is set to the best accuracy.

The present invention also includes the following aspects.

l. Claims characterized in that the hairspring beard holder consists of an L-shaped protrusion punched and bent into the obura-uke so that the L-shaped upright leg is perpendicular to the plane of the oburo-uke. Distribution group.

2. Claims characterized in that the adjustment needle consists of fingers bent in a U-shape, and the legs of the U-shape extend one on each side of the outermost curved part of the hairspring. The grouping section mentioned.

3. The adjustment needle consists of an opening defining several contoured protrusions, some of which are bent obliquely,
The Oburuke consists of a circular area bounded outward by several centroid arcs of circles of the same radius, and some protrusions of the slow and rapid needles extend above said circular area, while others extend below. The assembled part according to the claims, characterized by a wood.

4. The adjustment needle is bent downwardly between the three flat V-shaped protrusions located above the circular area, and is engaged below the circular area. 4. The assembled part according to item 3 above, characterized in that the blade is made up of three straight side protrusions.

5 The thickness of the adjustment needle and the bending angle of the straight side protrusion are as follows:
The assembled part according to item 4 above, wherein the radius vectors of the inner and outer ridges of the ends of the straight side protrusions are shorter and longer than the radius of the outer end of the circular area, respectively. .

6. The Ofuuke consists of a protrusion bent at right angles to its plane, and a flat metal plate forming the hairspring holder, and the center of the circular area consists of a circular opening in which the bearing is driven. The assembly section according to item 3 above.

7. One of said arcs of the circle forms the outer shell of the oburuke and the other arc of the circle is punched out within the oburuke and serves to engage at least one folding projection inside the elongated opening. 7. The assembled part according to item 6, characterized in that it forms an end.

[Brief explanation of drawings]

Figure 1 is a plan view of the assembly section of the present invention, and Figure 2 is the one shown in Figure 1.
A cross-sectional view taken along the line. 1... Base plate, 3... Screw, 9. ．． ．． ．．
．． ．． Hairspring, 2... Tenfuuke, 4...
・・Bearing, 5・・・Tenshu, 6・・・・
・Punching disk, 12... True, 10... Concave, 11... Ankle, 7... Roller pin, 8...・Hairdock, 20... Adjustment needle, 22, 23, 24... V-shaped protrusion, 25
, 26, 27... protrusion, 18, 19...
...Arc-shaped part.

Claims (1)

[Scope of Claims] 1. An Obu Uke-ichi slowing and quick hand assembly for a timepiece movement, characterized by the following items (1) to (d). (g) The above-mentioned adjustment needle 20 is composed of an annular plane part, and the annular plane part has at least three protrusions (25, 26, 27) that elastically protrude inwardly from the annular plane part. (a) The upper watch 2 consists of a planar disc-shaped holding circular part 17 connected to the main part 1 of the watch by at least one connecting arm, and is connected to the main part 1 of the watch by at least one connecting arm. Support both large wheel bearings. (b) The circular portion has a central circular opening 16 for holding the bearing 4, and an arc-shaped portion (arc-shaped portion ends 18, 19) around the central opening. (d) The end of the protrusion engages the end of the arcuate portion, while the annular flat portion engages the flat portion of the circular portion.