JP2596491Y2 - Tri-fold Nakadome 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 three-fold folding clasp of a watch band which is unlocked by a side push.

[0002]

2. Description of the Related Art For example, FIG.
As shown in a partially cutaway cross-sectional view of a middle clasp, a side view in the middle of opening and closing in FIG. 5, and a cross-sectional view in FIG. 6, the sliding plate is unlocked by pushing a sliding plate. There was a type.

The conventional clasp has an upper plate 1 on which one band is attached at a rear end, and both side pieces 2 erected on both sides of the upper plate 1.
And a first hole 3 formed in an intermediate portion of the side pieces 2, a pair of machines 4 disposed at intervals between the intermediate portions of the side pieces 2, and It has an upper piece 5 and a lower piece 6 formed at intervals.

A protruding piece 7 formed at one end is projected from the first hole 3 so that a sliding plate 8 slidably disposed between the upper and lower pieces 5 and 6 and a tip end thereof are slid. A compression spring 9 elastically attached to the plate 8 and disposed on the upper and lower pieces 5 and 6; a pair of bearing pieces 10 formed at intervals on the lower surface of the tip of the upper plate 1; A first lower plate 11 rotatably supported between the lower plates 10 and protruding rearward from the lower side of the lower piece 6
The rear end is rotatably supported by the rear end of the first lower plate 11, is disposed on both sides of the first lower plate 11, and the front end is projected forward from the bearing piece 10 and the other end is connected to the front end. And a second lower plate 12 for attaching the band.

Further, a paragraph groove 14 formed at a position corresponding to the sliding plate 8 on the upper surface of the second lower plate 12, and a lower plate 6
And the second through which the protrusion 13 is removably inserted.
A hole 15 and a slide plate 8 are formed to allow the protrusion 13 to be inserted through the slide of the operation plate 8 so that the protrusion 13 can be pulled out.
This is a middle clasp structure having a third hole 16 locked at the bottom and a counterbore edge formed on the lower surface of the peripheral edge of the third hole 16.

[0006]

In the conventional structure of the clasp described above, since there are two locking claws, it is necessary to adjust the position to match the phases of engagement with the respective operation plates. is there. In addition, since the operation plate and the spring are arranged in series, the width of the clasp is inevitably large, and in particular, there is a problem in the design appearance when applied to the clasp for women's bands with narrow bands. There was also. An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional clasp structure and to provide a three-fold clasp structure that is easy in structure and processing and that is narrow in the width direction of the band.

[0007]

Means for Solving the Problems To achieve the above object,
In order, the present invention is a three Setchu cuts that folding <br/> folded consisting front cover and the intermediate plate and the lower plate, the opposed pair of operating plates Ri attached locking mechanism taken in the front cover In the middle clasp structure to be released, the lock mechanism includes a pair of operation plates, each of which has a hollow frame member and a thin tip and is arranged so as not to interfere with each other , and the operation plate and the frame between the operation plates. Surrounded by members
Inside, a pair that is erected at the opposite position and pressed outward
Of made of an elastic material, wherein the two operation plates Ri formed detachably on the T-shaped locking claw having a step at the position of the locking surface of the right and left provided on the lower plate of distillate in the threefold, the Lower frame of table cover
The middle plate is attached to the lower surface of the
Characterized in that it is.

[0008]

According to the present invention, the three-fold folding clasp is formed so that the tips of a pair of operation plates are formed thin so as not to interfere with each other, and a T-shaped locking claw having a step at the position of the left and right locking surfaces. By attaching and detaching, it becomes thinner and narrower, which is advantageous in design appearance.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a partially cutaway plan view showing a locking structure in a locked state according to an embodiment of the present invention.
Is a sectional view.

The portion facing the three-fold front cover is the upper frame 2
1 and the lower frame 22 are fixed by brazing or the like.

At one end of the upper frame 21, a half band 23 is pivotally mounted by a spring bar 24.

On the lower surface of the lower frame 22, a connecting piece 25 to which a middle plate 26 is pivotally mounted is fixed by brazing or the like rather than a half band .

The middle plate 26 and the lower plate 27 are pivoted at the right end, and the other half band 28 is pivotally attached to the other end of the lower plate 27 by a spring bar 29.

As shown in FIGS. 2 and 3, a locking claw 30 is formed on the lower plate 27 in a folded state. The locking claw 30 has guide slopes 30a, a 'and a locking surface 30b for locking.
b 'is formed asymmetrically, and the locking claw 30 is provided with the escape hole 22a of the lower frame 22 and the locking holes 31a, 3 of the operation plates 31, 32.
2a that penetrate through 2a and locking surfaces 31b and 32b of operation plates 31 and 32
Is locked (locked). In addition, the locking claw 30 is the lower plate 2
7 may be formed by bonding such as brazing.

In the hollow portion formed by the upper frame 21 and the lower frame 22, operation plates 31 and 32 each having a thin end are arranged so as to partially project outside so as not to interfere with each other. I have. A coil-shaped spring 3 is provided between the operation plates 31 and 32.
The operation plates 31 and 32 are constantly pressed outward, and the operation plates 3 and 34 are provided. Further, screws 35 and 36 fixed from the lower surface of the lower frame 22 penetrate through clearance holes 31 c and 32 c formed in the operation plates 31 and 32 and serve as stoppers of the operation plates 31 and 32.

FIG. 3 is a cross-sectional view showing a locked state of the operation plates 31 and 32 and the locking claw 30. The operation plates 31 and 32 are formed to be thin at the tip by forging, cutting, or the like, and the thin portions are arranged so as to face each other so as not to interfere with each other, and the locking surfaces 31b and 32b have a step. Also,
The guide holes 31 d are formed in the locking holes 31 a and 32 a formed in the operation plates 31 and 32 in order to facilitate engagement with the locking claws 30.
And 32d are provided.

[0017]

As described above, according to the structure of the present invention, since the locking claw is provided at one place, there is almost no need to adjust the lock of the operating plate. The lock mechanism is a hollow frame
And it is in the member, thin and a possible previous operation plate is arranged so as not to interfere with each other are formed in the thin, but also have luxury with clasp of width narrower design is possible
You. In addition, the connection between the front cover and the middle plate is
The lower part of the band is made of more than a half band,
The longitudinal direction of the cylinder can also be shortened. In addition,
Since the pawls do not overlap with each other,
It becomes unnecessary and the processing of the clasp becomes easy. In addition, a pair of bullets
The active material is surrounded by the operation plate and the frame member between the operation plates.
Inside, it is set at the opposing position,
The elastic material is stably deformed by the pressure operation, and the movement of the operation plate
It can be done smoothly.

[0018]

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a three-fold clasp showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a partially cutaway plan view of a conventional structure.

FIG. 5 is a side view of a conventional structure.

FIG. 6 is a sectional view taken along the line BB in FIG. 4;

[Explanation of symbols]

 21 Upper frame 22 Lower frame 23 One half band 24, 29 Spring bar 25 Joint piece 26 Middle plate 27 Lower plate 28 Other half band 30 Locking claw 31, 32 Operation plate 33, 34 Spring 35, 36 Screw

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A44C 5/24

Claims (1)

(57) [Scope of request for utility model registration] 1. A clasp structure for releasing a folded three-fold clasp comprising a front cover, a middle plate and a lower plate by a pair of opposing operation plates of a lock mechanism attached to the front cover. In the lock mechanism, the hollow frame member and the tip is formed to be thin, a pair of operation plates arranged so as not to interfere with each other,
In the area surrounded by the operation plate and the frame member between the operation plates
A pair of elastic members which are elastically provided at opposing positions and are pressed outwardly, and the two operation plates are located at positions of left and right locking surfaces provided on a lower plate of the three-folded clasp. T with steps
Ri-shaped locking claw detachably formed, of the lower frame of the table cover
The middle plate is attached to the lower surface at a position that does not overlap with the locking claw.
The structure of a three-fold Nakadome that is characterized by being .