JP3007967U - One-touch Nakadome for watch band - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention has a sense of mass so that it does not deform even if it hits another object, it does not damage the cuffs, and it does not expand unless both push plates are pressed. The purpose is to provide a new one-touch Nakadome that does not cause unexpected loss. [Structure] The present invention connects an upper piece 1 and a lower piece 2 and an upper box 4 for one-touch operation having push plates 3a and 3b, which are foldably and unfoldably connected, between the watch bands 5a and 5b. In a one-touch clasp for a watch band, which is provided with a hanging protrusion 6 on the upper part, the upper piece 1 and the lower piece 2 are made of a metal plate having a thickness of 0.8 mm or more and the upper box 4 of a thickness of about 1.0 mm. Then, both ends of the upper piece 1 and the lower piece 2 are thinned by cutting the inner surface to form a winding cylinder portion 7 for connection, and the hanging projection 6 is thin with a circular head portion 6a in plan view. It is formed by a round bar body having a neck portion 6b, and the lower end of the round bar body is caulked so as to fit in a recess 8 provided on the back surface of the lower piece 2, and a protrusion for hanging on the push plates 3a, 3b. Child 6 neck
It is a one-touch Nakadome for a watch band, which is provided with U-shaped grooves 3c and 3d that sandwich and hold 6b from both sides.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a one-touch clasp for a watch band, more specifically, a one-touch clasp that has a sense of mass and is not deformed unintentionally, and is prevented from unraveling and unfolding.

[0002]

[Prior art]

 As one-touch Nakadome of this type, there is Japanese Utility Model Laid-Open No. 2-71318. In this publication, positioning grooves are provided at the four corners between the upper lid and the intermediate plate and the push button guide to be overlaid in the upper lid, and the positioning grooves are inserted in the convex portions provided on the upper piece of the three-fold metal fitting. The one-touch type three-fold metal fitting for a watch band is described in which the three members are positioned by wearing and spot welded to each other.

[0003]

[Problems to be solved by the device]

 However, in the conventional Nakadome, since the upper and lower pieces and the upper box are formed of thin plates with a thickness of 0.5 mm or less, these parts have the problem of being deformed by other objects during use. Since the hook-and-hook protrusion is formed in the shape of a hook with a bent claw on one side, there is a problem that the cuff of the wearer is caught and broken. If one of the push plates hanging on the part hits another object and is pushed, the catch for the catching / releasing projection is released and the clasp suddenly develops.

[0004]

[Means for Solving the Problems]

 The present invention connects the upper piece 1 and the lower piece 2 and the upper box 4 for one-touch operation having the push plates 3a and 3b, which are foldably and unfoldably connected, between the watch bands 5a and 5b and hangs on the lower piece 2. In a one-touch clasp for a watch band provided with a stripping protrusion 6, the upper piece 1 and the lower piece 2 are formed by a metal plate having a thickness of 0.8 mm or more and the upper box 4 is a thickness of about 1.0 mm. , Both ends of the upper piece 1 and the lower piece 2 are thinned by cutting the inner surface to form a winding cylinder portion 7 for connection, and the projection / disengagement protrusion 6 has a circular head portion 6a and a thin neck portion. 6b, and the lower end of the round bar is caulked so that it fits into the recess 8 provided on the back surface of the lower piece 2, and the protrusions for hanging on the push plates 3a, 3b. The problem is to solve this problem by providing U-shaped groove portions 3c and 3d for sandwiching and locking the neck portion 6b of the child 6 from both sides.

[0005]

[Action]

 In the present invention, the upper piece 1 and the lower piece 2 are made of a metal plate having a thickness of 0.8 mm or more, and the upper box 4 is made of a metal plate having a thickness of about 1.0 mm so as to have a sufficient mass, so that it is hard to hit other objects. Even if it does, it can be used smoothly without causing deformation such as dents or bends, and curling is difficult and bulky even for the winding cylinder part 7 by making the upper and lower pieces partly thick. The problem was solved by cutting the inner surface to make it thinner, and by forming the hanging projection 6 as a round bar that is circular in plan view, eliminating the hooking of cuffs, and further pressing plates 3a, 3b. Since the U-shaped groove portions 3c and 3d for hanging the hanging protrusion 6 from both sides are provided, one of the push plates 3a and 3b is pushed by hitting another object and the pushing protrusion 6 is pushed. Even if the hook on one side is released, if the other side is still hooked, Nakadome will not be deployed, and the risk of falling and loss, etc., caused by an unexpected deployment will be eliminated. .

[0006]

【Example】

 Embodiments will be described below with reference to the drawings.

The upper piece 1 and the lower piece 2 are formed of a metal plate having a thickness of 0.8 mm or more, and both ends of the upper piece 1 and the lower piece 2 are thinned to 0.5 mm or less by inner surface cutting. The winding cylinder portion 7 of the meshing type for connection is formed into a curved shape, the winding cylinder portion 7 between the upper piece 1 and the lower piece 2 is meshed with each other, and the pin 9a is inserted and connected so as to be foldable and expandable.

The other end of the upper piece 1 is connected to one end of the upper box 4 by a spring rod 9b, and the other end of the upper box 4 is connected to a half of the clock band 5a by a spring rod 9b.

The upper box 4 is formed by bending a thin rectangular crown into a metal plate having a thickness of about 1.0 mm, and punches from the inside between the vertical walls 4a and 4b to form window holes 4c and 4d. . The middle box 4e is fitted between the window holes 4c and 4d of the upper box 4, and the push plates 3a and 3b are inserted into the middle box 4e so as to partially project outward. 3c and 3d are U-shaped groove portions provided on the push plate, 10 is a coil spring for tensioning and supporting the push plates 3a and 3b, 11 is a slip-out preventing screw, 12 is a lower hole, and 13 is an upper hole.

A depression 8 is provided on the back surface of the lower piece 2 at a position corresponding to the U-shaped groove portions 3c and 3d, and has a circular head portion 6a and a thin neck portion 6b directly below to form a round bar shape. The hanging protrusion 6 to be formed is inserted upright, and the lower end is caulked in the recess 8. The end of the lower piece 2 is connected to the other half of the watch band 5b by the spring rod 9b. Reference numeral 14 is a play hole provided in a portion of the upper piece 1 where the hanging projection 6 comes in and goes out.

In the present invention, Nakatome folds the upper piece 1 onto the lower piece 2 together with the upper box 4 to fold it, and then the hook-and-drop projection 6 enters the middle box 4e through the play hole 14 and the lower hole 12. The head-shaped portion 6a pushes the U-shaped groove portions 3c and 3d apart from each other, and at the point where the neck portion 6b enters, the return movement of the U-shaped groove portions 3c and 3d accompanied by the extension of the coil spring 10 causes the hook-and-drop protrusion. 6 will be clamped from both sides and locked to maintain the folded state.

When deploying the clasp, the pushing plates 3a, 3b are moved inward while pushing the outer protruding portions of the pushing plates 3a, 3b to compress the coil spring 10. Since the inner surfaces of the U-shaped groove portions 3c and 3d are separated from the latching and releasing protrusion 6 to release the latching, the upper box 4 and the upper piece 1 are lifted and deployed from the lower piece 2 while pressing the push plates 3a and 3b. . The band ring will expand.

[0013]

[Effect of device]

 As described above, according to the present invention, the upper piece 1 and the lower piece 2 are made of metal plates having a thickness of 0.8 mm or more, and the upper box 4 is made of a metal plate having a thickness of about 1.0 mm. Therefore, even if it hits another object, it has the effect of not being deformed.

The winding cylinder portions 7 for connection provided at both ends of the upper piece 1 and the lower piece 2 can be formed easily and without bulk by thinning both ends by inner surface cutting, regardless of a thick metal plate. The effect of being able to do is produced.

Since the hanging protrusion 6 is formed in the shape of a round bar having a circular shape in a plan view, there is an effect that it is possible to prevent the cuff of the wearer from being caught and broken.

Further, since both sides of the neck portion of the hanging protrusion are sandwiched by the U-shaped groove portions 3c and 3d to be locked, even if one of the push plates hits another object and is pushed, the latched state is continuously maintained. Continuing to do so, the effect of eliminating the risk of loss and loss due to unexpected expansion will be produced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a clasp of the present invention in an expanded state.

FIG. 2 is a perspective view showing each member in a state before being connected.

FIG. 3 is a partially enlarged vertical cross-sectional side view showing an example of forming a mounting portion and a winding tube portion of the hanging protrusion.

[Fig. 4] Fig. 4 is a cross-sectional plan view showing the structure and operation of one-touch clasp, (a) showing a state in which a hooking / releasing protrusion is attached, and (b) pressing push plates 3a, 3b. It is a figure which shows the state which expanded between the U-shaped members 3c and 3d.

[Explanation of symbols]

 1 is an upper piece 2 is a lower piece 3a, 3b is a push plate 3c, 3d is a U-shaped groove 4 is an upper box 4a, 4b is a vertical wall 4c, 4d is a window hole 4e is a middle box 5a is a half watch band 5b Half of the watch band 6 is a hanging protrusion 6a is a circular head part in a plan view 6b is a thin neck part 7 is a winding cylinder part 8 is recessed 9a is a pin 9b A spring rod 10 is a coil spring 11 A slip-out prevention screw 12 is a pilot hole 13 is upper hole 14 is free hole

Claims (1)

[Scope of utility model registration request] 1. An upper piece 1 for folding and unfolding and an upper box 4 for one-touch operation having a lower piece 2 and push plates 3a, 3b are connected between watch bands 5a, 5b to form a lower piece 2. Hanging stud 6
In one-touch Nakadome for the watch band that is equipped with,
The upper piece 1 and the lower piece 2 are formed by a metal plate having a thickness of 0.8 mm or more, and the upper box 4 is formed by a metal plate having a thickness of about 1.0 mm, and both ends of the upper piece 1 and the lower piece 2 are thinned by inner surface cutting. And a winding cylinder portion 7 for connection are formed in a curved shape, and the hooking / disengaging protrusion 6 is formed into a circular head portion in plan view.
It is formed by a round bar body having 6a and a thin neck portion 6b, and the lower end of the round bar body is crimped so as to fit in a recess 8 provided on the back surface of the lower piece 2 and hooked on the push plates 3a, 3b. One-touch clasp for watch bands, which is provided with U-shaped groove portions 3c and 3d for holding the neck portion 6b of the detachable protrusion 6 from both sides.