JPH09191910A - Double door type inner retaining structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inner retaining structure capable of expanding and opening a second folding part from a outer plate simply through the opening of a first folding part from the outer plate, and improve operability. SOLUTION: This structure is formed out of a first folding part 100 with one end of one intermediate plate 104 jointed to one end of personal accessories, a second folding part 101 with one end of another intermediate plate 105 jointed to the other end of the accessories, an lock mechanism V1 for detachably engaging the first folding part 100 to a outer plate 103, and an interference projection 102 formed on the first folding part 100 toward the second folding part 101. The interference projection 102 is made to interfere with the second folding part 101, interlocked with the action of the release and expansion of the first folding part 100 from such a position as collapsed on the outer plate 103 of the first folding part 100 and the second folding part due to the locking by the lock mechanism V1, thereby expanding and opening the second folding part 101 from the outer plate 103.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double door open type clasp structure for accessories such as watch bands, bracelets and necklaces of wrist watches.

[0002]

2. Description of the Related Art A push clasp structure is known as a double clasp structure of a conventional watch band of a wristwatch. In the clasp mechanism 90 of this push clasp structure, as shown in FIGS. 37 and 38, the push button charging portion 71 of the clasp frame 70 is
One push button 72 is inserted from one end side, and the other push button 73 is inserted from the other end side, respectively, and the original side spring bearing portion 79A of the one push button 72 and the front side spring bearing of the other push button 73 are inserted. The springs 74 are respectively interposed between the spring 79 and the portion 79B and between the front side spring receiving portion 79B of the one push button 72 and the original side spring receiving portion 79A of the other push button 73. The one and the other push buttons 72, 73 are separated from each other by the urging force of the one push button 72, and the stopper portion 78 of the one push button 72 is attached to the one retaining pin 77A and the stopper portion 7 of the other push button 73.
8 abuts on the other retaining pin 77B.

Then, one and the other push button 7
The engaging portions 77 of the reference numerals 2 and 73 are opposed to each other, and these constitute the clasp side engaging portion. Also, push button 7
The push portions 75A of 2, 73 are push button charging portions 71.
It protrudes outward.

The clasp mechanism 90 of the push clasp structure constructed as described above is attached to a timepiece band structure having a center folding mechanism 80 having a double door opening structure.
The center folding mechanism 80 having the double-door structure has the engagement pin 8
One middle plate 85 is pivotally attached to one end of the outer plate 84 having three, and one end of the other middle plate 86 is pivotally attached to the other end of the outer plate 84. The other end of one middle plate 85 is pivotally attached to one connecting piece connecting part (not shown) of the middle clasp frame 70 of the middle clasp mechanism 90, and the other connecting piece of this middle clasp frame 70. One watch band 8 at the connecting portion 88
The connecting piece 82A at the end of 2 is connected. The other end of the other middle plate 86 is connected to the connecting piece 81A at the end of the other watch band 81.

After placing the wristwatch along the wrist, the other middle plate 86 is folded to the outer plate 84 side, and then one middle plate 85 is folded to the outer plate 84 side, and the end portion of the middle plate 85 is folded. The end portion of the other middle plate 86 is pressed by and the engaging pin 83 is engaged with the clasp side engaging portion, that is, the engaging portions 77 of the one and the other push buttons 72 and 73 which face each other, to complete the wristwatch. Put on your wrist.

When the wristwatch is detached from the wrist, the push portions 75A of the push buttons 72 and 73 on the one side and the push button 72 on the other side are sandwiched between the thumb and the index finger and pushed inward to push the push buttons 72 and 73 on the other side. Is moved against the spring 74 to open the space between the engaging portions 77 to release the engagement, and in this state, one of the middle plates 85 is opened to the outside, and the other end by the end of the middle plate 85 is opened. After pressing down on the end of the middle plate 86 is released, the clasp mechanism 90
The other middle plate 86 is opened by the hand that operated.

[0007]

However, in the double-door type clasp structure of the watch band described above, when the wristwatch is detached from the wrist, one and the other push buttons 7 are used.
The one middle plate 85 is opened with the thumb and forefinger operating the pushing parts 75A of 2, 73, and the pressing of the one middle plate 85 to the other middle plate 86 end is released. However, there is a problem that the operability is poor because it is necessary to open the other middle plate 86 by operating the middle clasp mechanism 90 to open the other middle plate 86.

The present invention has been made in view of the above problems, and an object of the present invention is to release the locking mechanism of the first folding portion and to remove the first folding portion from the outside. By simply expanding from the plate, both the second folding parts can be expanded from the outer plate, and the first and second folding parts can be double-opened with one operation. The object of the present invention is to provide a double-door open type clasp structure with good performance.

[0009]

In order to achieve the above-mentioned object, a double door type clasp structure according to the invention of claim 1 is
A first folding part in which one end of one of the middle plates is connected to one end of the accessory and a second folding part in which one end of the other middle plate is connected to the other end of the accessory; In the double door clasp structure with the other end of the middle plate connected to one end of the outer plate and the other end of the other middle plate connected to the other end of the outer plate, the first folding part is The first folding portion includes an interference protrusion that projects toward the second folding portion, and includes a locking mechanism that engages with the outer plate in a disengageable manner, the first folding portion including the first folding portion and the first folding portion. From the position where the second folding part is folded on the outer plate, the interlocking protrusion is linked to the second part by interlocking with the operation of releasing the locking mechanism and expanding the first folding part from the outer plate. It is characterized in that it is provided with an interlocking expansion mechanism that expands from the outer plate by interfering with the folding part.

With this structure, the first folding portion and the second folding portion
The folding part and the outer plate are folded, and the locking mechanism provided between the first folding part and the outer plate causes the first folding part and the outer plate to engage with each other to close the double door clasp. Here, when the first folding part is expanded from the outer plate, the second expanding part is expanded from the outer plate together with the operation by the interlocking expansion mechanism.

More specifically, the first folding portion is provided with an interference protrusion protruding toward the second folding portion. When the first folding part is expanded from the outer plate, the interference protrusion interferes with the second folding part, and biases the second folding part from the outer plate in the direction of expanding, that is, toward the front side of the accessory. . Therefore,
The second folding portion expands from the outer plate together with the first folding portion.

As described above, only by releasing the locking mechanism of the first folding part and expanding the first folding part from the outer plate, both the second folding parts expand from the outer plate. So, you can open the double door type Nakadome with a single operation. Therefore, the operation of opening the double-door type clasp can be simplified.

In order to achieve the above-mentioned object, the double-door type clasp structure of the present invention according to claim 2 is the double-door clasp structure of the first aspect, wherein the ornament of the accessory in the first folding portion is the same. A front cover was connected between one end and one end of the one middle plate, and the interference protrusion was arranged on the back side of the front cover.

With such a construction, not only the same operation as the operation of the above-mentioned invention of the first aspect can be achieved, but also at the position where the first folding portion and the second folding portion are folded by the outer plate, the interference protrusion is formed. , It is desirable to be in a position close to the second fold so as to interfere with the second fold. Such an interference protrusion is preferably provided on the back side of the front cover of the first folding portion.

The front cover is located on the front side of the second folding part at a position where the first folding part and the second folding part are folded on the outer plate, and the second folding part is more than the outer plate. Suppress the action of expanding. That is, the front cover is close to the front side of the second folding portion and presses the second folding portion against the outer plate.

Therefore, if the interference protrusion is provided on the back side of the front cover, the interference protrusion is surely brought close to the second folded portion when the first folded portion and the second folded portion are folded on the outer plate. You can position where you did. Therefore,
If the interference protrusion is attached to the back side of the front cover, the interference protrusion can be easily and reliably caused to interfere with the second folding portion. Furthermore, by providing the interference protrusion on the back side of the front cover, it is possible to hide the interference protrusion from the field of view of the wearer and prevent the appearance of the accessory from being deteriorated due to the presence of the interference protrusion.

Further, in order to achieve the above object, a double-door type clasp structure of the present invention according to claim 3 is the double-door clasp structure of claim 1 or 2, wherein the interference projections are The second folding portion is configured so as to interfere with a connecting end portion in which one end portion of the other middle plate is connected to the other end portion of the accessory.

With such a construction, not only the same operation as the operation of the above-mentioned invention of claim 1 can be achieved, but also when the first folding part and the second folding part are folded by the outer plate, the second folding part is formed.
In the folded portion of, the connecting end portion is located closest to the first folded portion. Therefore, if the interference protrusion of the first folding portion is made to interfere with the second descending folding portion, the connection end portion of the second folding portion is most likely to interfere. That is, if it is the connecting end of the second folding portion,
In addition, it is possible to reliably interfere with the protrusion interference.

In order to achieve the above-mentioned object, a double-door type clasp structure of the present invention according to a fourth aspect is the double-door clasp structure of the third aspect described in claim 3, wherein the second end is provided at the connecting end. A connecting piece connected to one end of the other middle plate is provided at the other end of the accessory in the folding portion, and an interference convex portion protruding toward the first folding portion is formed in the connecting piece. Then, the back surface of the interference convex portion was caused to interfere with the interference protrusion.

With such a construction, not only the same operation as the operation of the invention of claim 3 (claim 1) described above can be achieved, but also the interference projection protruding from the second folding portion toward the first folding portion. Since the portion is provided and the interference protrusion interferes with the back surface of the interference protrusion, the interference protrusion can easily and surely interfere with the second folding portion.

In order to achieve the above object, a double-door type clasp structure according to the invention of claim 5 is the double-door clasp structure according to any one of claims 1 to 4. The protrusion is provided so as to be movable along the longitudinal direction of the accessory, and is elastically biased by the elastic biasing means toward the second folding portion.

With such a construction, not only the same operation as the operation of the above-mentioned invention of claim 1 can be achieved, but also after the second folding part is folded on the outer plate, the first folding part is turned to the outer plate. In the folding process, the interference protrusion of the first folding portion first comes into contact with the second folding portion, and is directed toward the first folding portion along the longitudinal direction of the accessory while resisting the biasing force of the elastic biasing means. Withdraw. When the first folding portion is further moved toward the outer plate, the interference protrusion crosses the second folding portion. Then, due to the urging force of the elastic urging means, the interference protrusion projects toward the second folding portion and is located on the back side of the second folding portion.

With this configuration, when the first folding portion and the second folding portion are folded on the outer plate, the interference protrusion of the first folding portion can be easily located on the back side of the second folding portion. Therefore, the interference protrusion can easily and surely interfere with the second folded portion.

Such a structure is suitable for a double door clasp type clasp, in which the first folding portion locks the second folding portion on the outer plate by locking the first folding portion to the outer plate.

In order to achieve the above-mentioned object, a double-door type clasp structure according to the invention of claim 6 is the double-door clasp structure according to any one of claims 1 to 5. An interference protrusion accommodating portion is provided on the back side of the cover along the longitudinal direction of the accessory, and the interference protrusion accommodating portion and elastic biasing means for biasing the interference protrusion toward the second folding portion are inserted into the interference protrusion accommodating portion. I arranged it.

With this structure, not only the same operation as that of the above-described invention of the first aspect can be achieved, but also the interference protrusion movable along the longitudinal direction of the accessory and urged toward the second folding portion. Can be easily attached to the back side of the front cover.

Further, in order to achieve the above object, the double-door type clasp structure according to the invention of claim 7 is the double-fold double clasp structure according to any one of claims 1 to 6. The stop mechanism is a push locking mechanism attached to the front plate, and the push locking mechanism includes an insertion space provided in the front plate along a lateral direction of the accessory, and a short edge of the accessory inside the insertion space. A push button slidably arranged along the direction, a button side engaging portion provided on the push button, and a button side elasticity for urging the push button outward along the lateral direction of the accessory. An urging means and an outer plate side engaging portion provided on the outer plate are provided, and the button side elastic urging means urges the button side engaging portion toward the outer plate side engaging portion. The button side engaging portion and the outer plate side engaging portion When but engage and acupressure against the bias of the button-side resilient biasing means the push button,
The button side engaging part is separated from the outer plate side engaging part and is disengaged, and the interference protrusion is provided in a part of the insertion space so as to be movable along the longitudinal direction of the accessory. Further, the elastic urging means urges the elastic body toward the second folded portion.

With such a construction, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but a part of the insertion space of the push button in the push locking mechanism is provided with the interference projection and the interference projection. By using the elastic protrusion as the interference projection insertion portion provided by inserting the elastic biasing means, the space required for the push locking mechanism is mainly the space along the transverse direction of the accessory required for the insertion space. Since the space required for this push locking mechanism and the space required for the interference projection insertion part along the longitudinal direction of the accessory can be overlapped in a plane, the space required for both the push locking mechanism and the interference projection insertion part is greatly increased. Can be made smaller. This means that the front plate including the push locking mechanism and the interference protrusion can be downsized. As a result, the double-door type clasp structure can be made compact.

Further, one push button and the other push button are inserted inside the insertion space so as to face each other along the lateral direction of the accessory, and one and the other push buttons are engaged with the outer plate side engaging portions. In the case of the dual push locking mechanism, if the interference protrusion and the elastic biasing means are arranged between the one push button and the other push button, the required space can be significantly reduced. At this time, the elastic biasing means may be arranged between the interference projection and the push button so that the elastic biasing means can be bent between the interference projection and the push button.

In order to achieve the above-mentioned object, a double-door type clasp structure according to the invention of claim 8 is the double-fold double clasp structure according to any one of claims 1 to 4. The interference protrusion provided on the first folding part so as to be movable along the longitudinal direction of the accessory, the elastic biasing means for biasing the interference protrusion in the direction of being retracted into the first folding part, and the first A push button arranged in the folding portion, wherein the push protrusion is moved by finger pressure to move the interference protrusion that is recessed in the first folding portion against the bias of the elastic biasing means, The cam means is provided so as to protrude from the first folding portion.

With such a construction, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but unless the push button is acupressure, the interference projection is moved to the first folding portion by the urging force of the elastic urging means. Immersed. At the position where the first folding part and the second folding part are folded on the outer plate,
When the push button is pressed, the cam means causes the interfering protrusion that is recessed in the first folding portion to move along the longitudinal direction of the accessory against the biasing force of the elastic biasing means and project from the first folding portion. . Next, when the first folding portion is opened from the outer plate, the protruding interference protrusion interferes with the second folding portion, and the second folding portion is expanded from the outer plate, that is, toward the front side of the accessory. Force. Therefore, the second folded portion expands from the outer plate together with the first folded portion. When the finger is released from the push button, the interference protrusion is retracted into the first folding portion again by the urging force of the elastic urging means.

As described above, unless the push button is pressed, the interference protrusion is retracted into the first folding portion by the urging force of the elastic urging means, so that the interference protrusion can be hidden from the visual field of the wearer. Therefore, the appearance of the accessory is improved.

Further, when the first folding portion and the second folding portion are folded on the outer plate, the interference protrusion does not come into contact with the second folding portion, so that the interference protrusion is prevented from being worn or bent or bent. You can Therefore, the interlocking expansion mechanism can function well over a long period of time.

Further, in order to achieve the above object, a double-door type clasp structure according to the invention of claim 9 is the double-folding clasp structure of the double-door structure according to any one of claims 1 to 4. The stop mechanism is a push locking mechanism attached to the first folding portion, and the push locking mechanism is provided in the insertion space provided along the lateral direction of the accessory on the front plate, and inside the insertion space. A push button slidably arranged along the lateral direction of the accessory, a button-side engaging portion provided on the push button, and urging the push button outward along the lateral direction of the accessory. A button-side elastic urging means and an outer-plate-side engaging portion provided on the outer plate, wherein the button-side elastic urging means directs the button-side engaging portion toward the outer-plate-side engaging portion. The button side engaging portion and the outer When the push button is pressed against the urging force of the button side elastic urging means, the button side engaging part is separated from the outer plate side engaging part. The interference protrusion is provided in the first folding portion so as to be movable along the longitudinal direction of the accessory, and the interference protrusion is biased in the direction in which the interference protrusion is retracted into the first folding portion. Elastic biasing means for operating the push button by finger pressure to move the interference protrusions that are recessed in the first folding portion against the bias of the elastic biasing means to move the first biasing portion. The cam means is provided so as to protrude from the folding portion.

With such a construction, not only the same operation as that of the invention of claim 1 described above can be achieved, but the interference projections are moved by the biasing force of the elastic biasing means unless the push button of the push locking mechanism is pressed. Immersed in the folding part 1. The first folding part and the second folding part are folded on the outer plate, and the push locking mechanism engages the first folding part and the outer plate. The second folding portion may be pressed against the outer plate by the front plate connected to the first folding portion,
A second locking mechanism may be provided between the second folding portion and the outer plate.

When the push button is pressed at the position where the first folding part and the second folding part are folded on the outer plate, the engagement between the first folding part and the outer plate is released, and at the same time, the cam is released. By the means, the interference protrusion that is recessed in the first folding portion moves along the longitudinal direction of the accessory against the biasing force of the elastic biasing means and projects from the first folding portion. Then
When the first folding part is expanded from the outer plate, the protruding interference protrusion interferes with the second folding part, and is attached in the direction of expanding the second folding part from the outer plate, that is, toward the front side of the accessory. Energize. Therefore, the second folded portion expands from the outer plate together with the first folded portion. When the finger is released from the push button, the interference protrusion is retracted into the first folding portion again by the urging force of the elastic urging means.

As described above, the finger pressure of the push button releases the engagement between the first folding portion and the outer plate, and at the same time, the interference protrusion protruding into the first folding portion and the second folding portion are directed. The projection is made to function and the interlocking expansion mechanism functions.

As long as the push button is not pressed, the interference projection is retracted into the first folding portion by the biasing force of the elastic biasing means, so that the interference projection can be hidden from the field of view of the wearer. Therefore, the appearance of the accessory is improved.

Furthermore, when the first folding portion and the second folding portion are folded on the outer plate, the interference protrusion does not come into contact with the second folding portion, so that the interference protrusion is prevented from being worn or bent or bent. be able to. Therefore, the interlocking expansion mechanism can function well over a long period of time.

In order to achieve the above-mentioned object, the double-door type clasp structure according to the invention of claim 10 is the structure of claim 9.
In the double-door double clasp structure as described above, the interference protrusion is movably provided in a part of the insertion space along the longitudinal direction of the accessory, and is biased toward the second folding portion by the elastic biasing means. It was

With this structure, not only the same operation as the operation of the invention of claim 9 (claim 1) described above can be achieved, but also the space required for the push locking mechanism, the interference projection,
Since the space along the longitudinal direction of the accessory required for the interference projection insertion portion for inserting and arranging the elastic biasing means for biasing the interference projection can be overlapped in a plane, the push locking mechanism. It is possible to significantly reduce the space required for both the interference projection insertion portion. Therefore, the double-door type clasp structure can be made compact.

Further, one push button and the other push button are inserted into the insertion space so as to face each other along the lateral direction of the accessory, and one and the other push buttons are engaged with the outer plate side engaging portions. In the case of the dual push locking mechanism, if the interference protrusion and the elastic biasing means are arranged between the one push button and the other push button, the required space can be significantly reduced. At this time, the elastic biasing means may be arranged between the interference projection and the push button so that the elastic biasing means can be bent between the interference projection and the push button.

In order to achieve the above-mentioned object, the double-door type clasp structure according to the invention of claim 11 is the structure of claim 8.
Alternatively, in the double-door double clasp structure according to claim 9, the cam means includes a cam slope formed on the push button and a copying protrusion formed on the interference protrusion and slidingly contacting the cam slope.

With such a construction, not only the same operation as the operation of the above-mentioned invention of claim 8 or claim 9 (claim 1) can be achieved, but also the cam means can be constructed with a simple structure.

In order to achieve the above-mentioned object, the double-door type clasp structure according to the invention of claim 12 is the structure of claim 8.
Alternatively, in the double door clasp structure according to claim 9, the cam means is located at one end of the accessory on the contact surface along the longitudinal direction of the accessory at the inner end of the one push button and the other end of the accessory. One inclined cam part having a cam slope inclined to one side and the contact surface of the inner end of the other push button along the longitudinal direction of the accessory is located on one end side of the accessory and inclined toward the other end side of the accessory Has a sloped cam surface, and the base of the sloped cam portion has a dimension in the longitudinal direction of the accessory that is larger than the base of the sloped cam portion and has a height lower than that of the sloped cam portion and the top end surface of the sloped cam portion. Of the detachable piece having the other inclined cam portion larger than the top end surface of the piece and the main body of the piece having the interference protrusion on the other end side of the accessory, and having the clasp side engaging portion on the side opposite to the interference protrusion. One and the other copy provided at both ends of And a push-button insertion portion for inserting the attachment / detachment piece into the attachment / detachment piece insertion portion, and the attachment / detachment piece is attached to the attachment / detachment piece by elastic urging means. The one detachable piece is inserted between the one push button and the other push button by urging it toward one end side, and the one sloping inclined surface abuts on the cam slant surface of the one slant cam portion, and the other slant cam is formed. The top end surface of the portion was brought into contact with the side surface of the removable piece.

With such a construction, not only the same operation as that of the invention of claim 8 or claim 9 (claim 1) described above can be achieved, but also one push button is pushed by pushing one and the other push button. Moves inward, the cam slope of the inclined cam portion slides on the inclined slope, and pushes the attachment / detachment piece against the elastic biasing means by 1/2 of the stroke amount of the attachment / detachment piece. Therefore, the top end surface of the other inclined cam portion is displaced from the side surface of the attachment / detachment piece, and the other copying inclined surface is located on the extension of the cam inclined surface of the other inclined cam portion.

Then, when the other push button is pushed in, the cam slope of the inclined cam portion slides on the other copying slope and the detachable piece is moved to the remaining half of the stroke amount of the detachable piece. Pushes against the elastic biasing means. Therefore, the interference protrusion of the detachable piece projects and interferes with the other folding portion side.

As described above, the engagement between the first folding portion and the outer plate is not released unless both the one push button and the other push button are pressed. Therefore, even if an unintended external force is applied to one of the push buttons and the other, the first
Since the engagement between the folded portion and the outer plate is not released, the double door clasp does not open accidentally.

Further, unless the push buttons on one side and the other side are pressed together, the interference protrusions that are recessed in the first folding portion do not completely project toward the second folding portion, so that the interference protrusions are seen from the field of view of the wearer. Can be hidden. Therefore, the appearance of the accessory is improved.

In order to achieve the above-mentioned object, the double-door type clasp structure according to the invention of claim 13 is the structure of claim 8.
Alternatively, in the double door clasp structure according to claim 9, the push button is urged outward along the lateral direction of the accessory by the elastic urging means that urges the interference protrusion.

With such a construction, not only the same operation as the operation of the invention of claim 8 or claim 9 (claim 1) described above can be achieved, but the elastic biasing means for biasing the interference projection can push the push button. Since it also serves as the button-side elastic biasing means for biasing outward, the number of parts can be reduced. Therefore, the double-door type clasp structure can be manufactured at low cost.

In order to achieve the above-mentioned object, the double-door type clasp structure according to the invention of claim 14 is the structure of claim 1.
In the double-door type clasp structure according to any one of claims 13 to 13, when the locking mechanism is the first locking mechanism,
A second locking mechanism is provided which engages with the second folding portion and the outer plate in a disengageable manner, and the second locking mechanism accommodates the other middle plate in the inside thereof and the outer plate. The inner plate has a storage part having the same outer surface, and at least one pivot protrusion is provided on either the outer surface of the other middle plate or the inner surface of the storage part. A pivot projection engaging portion with which the pivot projection engages is provided on either the outer surface of the other middle plate facing the projection or the inner surface of the storage portion.

With this construction, not only the same operation as the operation of the first aspect of the invention described above can be achieved, but also the outer plate and the middle plate can be securely locked and held, and the first folding is possible. The engagement between the second folding portion and the outer plate is easily released by the urging force of the interference protrusion in the portion.

[0054]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) Embodiment 1 of a double door open type clasp structure according to the present invention is shown in FIGS. 1 is a perspective view of a first embodiment of a double-door type clasp structure according to the present invention, FIG.
FIG. 3 is a perspective view of a first folding portion of the double-door sound opening type clasp structure, and FIG. 3 is an explanatory view of an initial folding state of the double-tone structure clasp structure.
FIG. 4 is an explanatory view of a folded state of the sound opening type clasp structure, FIG.
FIG. 6 is an explanatory view of the operation of the locking mechanism, and FIG. 6 is an explanatory view of an open state of the sound opening type clasp structure.

The double-door type clasp structure according to the present invention is assembled to an accessory S. The accessory S is connected to a wrist watch (not shown) and one band mounting portion (not shown) of the wrist watch. One wristwatch band 1 and the other wristwatch band 2 connected to the other wristband mounting portion (not shown) of the wristwatch. The double-door open type clasp structure is provided with the double-fold double folding mechanism 4, the first folding part 100, the second folding part 101, and the interference protrusion 102 provided on the first folding part 100. .

The double-folded folding mechanism 4 has an outer plate 103.
And one and the other middle plates 104 and 105, and the outer plate 103 is a pair of outer plate forming members 103A and 103.
The intermediate portion of B is connected to each other by connecting pins 106 and 107, and one connecting pin 106 is located closer to one end (right end) than the center of the outer plate 103 and the other connecting pin 107.
Are located closer to the other end (left end) than the center of the outer plate 103, and a space along the longitudinal direction of the accessory is formed between the outer plate forming members 103A and 103B. The (right end) side is one side of the middle plate storage portion 108
Further, the other end (left end) side from the center of the space is formed in the other middle plate storage portion 109, respectively. One end of the outer plate 103 is connected to one connecting portion 110, and the other end of the outer plate 103 is connected to the other connecting portion 111.

Then, one connecting portion 110 of the outer plate 103.
The other end (left end) of one of the intermediate plates 104 is connected to the connecting pin 11.
The other end (right end) of the other middle plate 105 is foldably connected to the other connecting part 111 of the outer plate 103 by a connecting pin 113.

At one end (right end) of one middle plate 104,
An accessory connecting portion 114 bent at a right angle in the front direction with respect to the surface portion 104A of the middle plate 104 is formed, and a pin hole 115 along the lateral direction of the accessory is formed on the tip side of the accessory connecting portion 114. I am doing it. An interference protrusion 102 is provided on one end of one of the intermediate plates 104.

That is, the interference protrusion 102 is located at the center of the curved end 114A of the base of the accessory coupling unit 114 and protrudes toward the second folding unit 101, and the surface portion 102A of the interference protrusion 102 is The interference protrusion 102 is located near the back surface 104B of the middle plate 104 so as to be located substantially in the same plane as the back surface 104B.

On the back surface 104B at one end of the one middle plate 104, there are formed a locking groove 116 and a concave groove 117 along the lateral direction of the accessory, and the locking groove 116 and the concave groove 117. The locking piece 118 is formed. The locking groove 116 is for locking one of the connecting pins 106 in a disengageable manner when the one middle plate 104 is folded toward the outer plate 103, and in this case, the locking piece. As shown in FIG. 5, the portion 118 is elastically deformed toward the concave groove 117 side, and includes one of the connecting pins 106, the locking groove 116, and the locking piece portion 1.
The first locking mechanism V1 is formed by 18 and.

A tip piece 124 is provided at one end of the accessory S, that is, an end of one of the watch bands 1, and a pin hole 125 provided in the tip piece 124 is provided at an end of the tip piece 124. By inserting a connecting pin (spring pin) 126 into the pin hole 115 of the accessory connecting portion 114, the accessory connecting portion 114 is foldably connected, and these and the one intermediate plate 104 are first folded. The part 100 is configured.

On the other hand, one end (left end) of the other middle plate 105 is formed with an accessory connecting part 119 which is bent at a right angle to the surface 105A of the middle plate 105 in the front direction. A pin hole 120 is formed on the front side of the connecting portion 119 along the lateral direction of the accessory. Then, the back surface of the one end (left end) of the other middle plate 105 is the interference protrusion 102.
Is an interference unit 105C that interferes with each other.

On the back surface 105B at one end of the other middle plate 105, there are formed a locking groove 121 and a concave groove 122 along the lateral direction of the accessory, and the locking groove 121 and the concave groove 122. The locking piece 123 is formed. The locking groove 121 is for locking the other connecting pin 107 so that the other connecting pin 107 can be engaged and disengaged when the other middle plate 105 is folded to the outer plate 103 side. The part 123 is elastically deformed toward the concave groove 122 side, and the other connecting pin 107, the locking groove 121, and the locking piece part 123 constitute the second locking mechanism V2.

A tip piece 127 is provided at the other end of the accessory S, that is, the end of the other watch band 2, and a pin hole 128 provided in the tip piece 127 is provided at the end of the tip piece 127. By inserting the connecting pin (spring pin) 129 into the pin hole 120 of the accessory connecting part 119, the accessory connecting part 119 is foldably connected, and these and the other middle plate 105 are connected to each other. The folding part 101 is configured. Then, the one middle plate 10 of the first folding part 100.
4 and the interference portion 105C provided on the other intermediate plate 104 of the second folding portion 101 constitute an interlocking expansion mechanism.

Next, the mounting and unmounting of a wrist watch having a watch band structure having the double door clasp structure constructed as described above will be described.

First, after putting a wristwatch as an accessory along the wrist, one of the middle plates 104 is superposed on the outer plate 103 with a pivotal connection portion of the middle plate 104 and the outer plate 103 as a fulcrum. The inner plate 104 is housed in one of the middle plate housing portions 108, and one of the connecting pins 106 is placed in the locking groove 116.
Insert and lock. In this case, the locking piece portion 118 interferes with one of the connecting pins 106 and is elastically deformed toward the concave groove 117 side, so that the one of the connecting pins 106 is locked in the locking groove 116 reliably. In addition, the interference protrusion 102 provided on one end of the one middle plate 104 has one and the other connecting pins 106, 10
It passes between 7 and is located on the wrist side from these connecting pins 106 and 107.

Next, the other middle plate 105 is attached to the outer plate 1 of this.
03 as a fulcrum, the other middle plate 105 is accommodated in the other middle plate accommodating portion 109 by overlapping with the outer plate 103, and the other connecting pin 107 is fitted in the locking groove 121. Insert and lock. In this case, the locking piece 123
Interferes with the other connecting pin 107 and is elastically deformed toward the concave groove 122 side, so that the other connecting pin 107 can be securely locked in the locking groove 121. In this case, the front surface portion 102A of the interference protrusion 102 abuts on the interference portion 105C on the back surface of the one end portion of the other middle plate 105.

When the wristwatch is removed from the wrist, as shown in FIG. 6, the one middle plate 104 is sandwiched between the thumb and the index finger and pulled outward to pull out the one middle plate 10.
The locking of one of the connecting pins 106 in the locking groove 116 of No. 4 is released, and one of the intermediate plates 104 is opened to the outside.

By opening the one middle plate 104 to the outside, the interference protrusion 102 of one middle plate 104 is made to move to the other middle plate 1.
The interference part 105C of No. 05 is pushed outward, and the other middle plate 10
The other connecting pin 107 in the engaging groove 121 of 5 is released, and the other intermediate plate 105 is opened to the outside. In this state, the wristwatch is removed from the wrist.

In the first embodiment described above, the first folding part 100 and the second folding part 101 are folded on the outer plate 103, and the first folding part 100 and the outer plate 103 are provided between the first folding part 100 and the outer plate 103. From the first locking mechanism V1, the first folding portion 100
And the outer plate 103 are engaged with each other, and the double folding mechanism 4 is closed. Here, when the first folding part 100 is expanded from the outer plate 103, the second folding part 101 is expanded from the outer plate 103 together with the operation by the interlocking expansion mechanism described above.

More specifically, the first folding part 100 has an interference projection 102 protruding toward the second folding part 101. When the first folding part 100 is expanded from the outer plate 103, the interference projection 102 is formed. Interferes with the second folding part 101,
The second folding portion 101 is urged in the direction of expanding from the outer plate 103, that is, toward the front side of the accessory. Therefore,
The second folding part 101 expands from the outer plate 103 together with the first folding part 100.

In this way, the first folding portion 100 has the first
By simply releasing the locking mechanism V1 of the first folding section 100 and expanding the first folding section 100 from the outer plate 103, both of the second folding section 10 and
Since 1 spreads out from the outer plate 103, the double folding mechanism 4 can be opened by a single operation. Therefore, the operation for opening the double-door type clasp structure can be simplified for the wearer.

In the most common double-door type clasp structure, if the first folding part 100 is locked to the outer plate 103, the first folding part 100
Since the second folding part 101 is pressed against the outer plate 103 by the second folding part 100, it is not necessary to additionally provide a means for engaging the second folding part 101 and the outer plate 103.

However, when the first locking mechanism V1 is used as the locking means for the first folding part 100 and the outer plate 103, the second folding part 101 and the outer plate 103 are operated by the second locking mechanism V2. It may be disengageably engaged with. In this case, the second locking mechanism V2 is moved to the second locking mechanism V2 by the biasing of the interference protrusion 102.
It is preferable that the folded portion 101 is easily disengaged from the outer plate 103.

It should be noted that the interference protrusion 102 may be provided anywhere in the first folding section 100. It may be provided at one end of the accessory (watch band 1),
It may be provided at one end of one of the intermediate plates 104. Further, the interference protrusion 102 may be brought into contact with any of the second folding parts 101 to cause interference. The interference protrusion 102 may interfere with the other end (the watch band 2) of the accessory or with one end of the other intermediate plate 105.

Further, the interference protrusion 102 is provided on the other end of the accessory in the second folding portion 101, and the other middle plate 105 is provided.
The first folding part 100 and the second folding part 1 are configured so as to interfere with the connecting end part that connects one end parts of the
When 01 is folded on the outer plate 103, the connection end is located closest to the first folding part 100 in the second folding part 101.

Therefore, if the interference protrusion 102 of the first folding portion 100 is intended to interfere with the second folding portion 101, the connecting end portion of the second folding portion 101 is most likely to interfere. That is, if it is the connecting end portion of the second folding portion 101, it is possible to easily and reliably cause the projection interference 102 to interfere.

In this case, the simplest method is that when the first folding part 100 and the second folding part 101 are folded on the outer plate 103, the first folding part 100 is formed.
That is, the protrusion interference 102 is located on the back side of the connection end portion of the second folding portion 101. As a universal method, when the first folding part 100 is unfolded from the outer plate 103, the connecting end of the second folding part 101 is positioned within a range where the interference protrusion 102 is about to move. It is to let.

The interference projection 101 may interfere with either the other end of the accessory or one end of the other intermediate plate 104, or both. Further, as shown in the figure, the interference portion 105C with which the interference protrusion 102 abuts is recessed toward the front side of the accessory, and the interference protrusion 10
It is preferable to form it as a step portion that opens toward 2. Further, the depth of the stepped portion along the front-back direction of the accessory is preferably equal to or greater than the thickness of the interference protrusion 102 along the front-back direction of the accessory. Then, when the double-folding folding mechanism 4 is closed, as shown in FIG. 4, the interference protrusion 102 is positioned inside the interference portion 105C, which is a step,
The interference protrusion 102 does not protrude from the back side of the outer plate 103. Therefore, even if the interference protrusion 102 is provided, it is possible to maintain a good fit.

(Embodiment 2) Embodiment 2 of the double-door type clasp structure according to the present invention is shown in FIGS. FIG. 7 is a perspective view of a second embodiment of the double door clasp structure according to the present invention in a disassembled state, FIG. 8 is a perspective view of a disassembled state of an interference projection mechanism portion of a front cover of the double door clasp structure, and FIG. FIG. 10 is a plan view of the interference projection mechanism part with a part omitted, FIG. 10 is a perspective view of a first folding part in the sound opening type clasp structure, FIG. 11 is a vertical cross-sectional view of the first folding part, and FIG. (1) to (3) are explanatory views of a closing operation of the same-tone opening type clasp structure, FIG. 13 is an explanatory view of a releasing operation of the same-tone opening type clasp structure, and FIG. 14 is a front cover of the same-tone opening type clasp structure. FIG. 15 is a perspective view of another interference protrusion mechanism portion in a disassembled state, FIG.
FIG. 16 is a vertical sectional view of the interference protrusion mechanism portion.

The double-door open type clasp structure according to the second embodiment of the present invention is assembled to the accessory S in the same manner as the double-door clasp structure according to the first embodiment. In addition, this double-door folding type clasp structure has a double-folding double folding mechanism 4, a first folding portion 100, a second folding portion 101, and a front cover 1.
30 and an interference protrusion mechanism portion 131 provided on the front cover 130.

The double-folded double folding mechanism 4 has an outer plate 133.
And one and the other middle plates 134, 135. One end (right end) side of the center of the outer plate 133 is one middle plate housing 136, and the other end (left end) side of the center is the other. Each of the intermediate plate accommodating portions 137 is formed, and a connecting pin 138 is provided near the center of the outer plate 133 of the one intermediate plate fitting portion 136. One end of the outer plate 133 is connected to one connecting portion 139, and the other end of the outer plate 133 is connected to the other connecting portion 140.

Then, one connecting portion 139 of the outer plate 133.
The other end (left end) of the one middle plate 134 is connected to the connecting pin 14.
The other end (right end) of the other middle plate 135 is foldably connected to the other connecting part 140 of the outer plate 133 by the connecting pin 142.

On the back surface portion 134B at one end of the one middle plate 134, there are formed the engaging groove 154 and the concave groove 155 along the lateral direction of the accessory, and the engaging groove 154 and the concave groove 155. A locking piece 156 is formed. The locking groove 154 is for locking the connecting pin 138 in a disengageable manner when the one middle plate 134 is folded to the outer plate 133 side, and in this case, the locking piece 156. Is the groove 15
The connecting pin 138, the engaging groove 154, and the engaging piece 156 constitute an engaging mechanism V3, which is elastically deformed toward the fifth side.

Then, one end (right end) of one middle plate 134
A connecting piece 143 is swingably attached to the portion by a connecting pin 144, and the connecting piece 143 is provided with a pin hole 145 along the lateral direction of the accessory.

As shown in FIGS. 7 to 9, the front cover 130 has a quadrangular surface portion 146 in plan view and the surface portion 1
46 has side wall portions 147 and 148 formed at both ends in the lateral direction of the clothing accessory along the longitudinal direction of the clothing accessory, and pin holes are formed at the base ends (right ends) of these sidewall portions 147 and 148. 164 is provided. Further, a thick portion 149 is formed on the back side of the surface portion 146 of the front cover 130, and the interference protrusion insertion portion 150 is formed in the thick portion 149. The interference projection insertion portion 150 is a rectangular insertion recess 1
51 is a recess 1 for moving the stopper at both ends in the lateral direction of the accessory.
52, one end of the insertion recess 151 reaches the end surface 149A of the thick portion 149 on the second folding portion 101 side and is released, and the other end of the insertion recess 151 has an end. It is a wall 151A. Further, screw holes 153 are provided at the four corners of the thick portion 149.

The interference protrusion insertion portion 150 constitutes an interference protrusion accommodation portion 158 by a lid 157 which is covered with the thick portion 149 and screwed to the interference protrusion accommodation portion 158. 131 are housed.

The interference projection mechanism section 131 includes the interference projection 1
59 and a leaf spring 160 which is an elastic urging means. The interference protrusion 159 has stopper portions 161 formed at both ends in the lateral direction of the accessory. The interference protrusion 159 and the leaf spring 160 form the interference protrusion insertion portion 150.
Is inserted into the insertion recess 151 of the stopper part 161.
Is inserted into the stopper moving concave portion 152, and the interference protrusion 159 is biased toward the second folding portion 101 side by the biasing force of the leaf spring 160, and the stopper portion 161 is the end surface of the stopper moving concave portion 152. The interference protrusion 159 is in contact with the portion 152A and protrudes toward the second folding portion 101 side. In this case, the interference protrusion 1 is provided on the back side of the front cover 130.
Since there is 59, the interference protrusion 159 can be hidden from the wearer's visual field, and it is possible to prevent the appearance of the accessory from being deteriorated due to the presence of the interference protrusion 159.

A tip piece 162 is provided at one end of the accessory S, that is, an end of one of the watch bands 1, and a pin hole 163 provided in the tip piece 162 is provided at an end of the tip piece 162. Pin hole 145 of connecting piece 143 and front cover 14
By inserting the connecting pin (spring pin) 165 into the pin holes 164 of the side wall portions 147 and 148 of the reference numeral 6, one end portion of the middle plate 104 is connected to one end portion of the watch band 1 via the connecting piece 143. The front cover 146 and the front cover 146 are foldably connected to each other, and the first folding portion 100 is configured by these and the one middle plate 104.

A connecting piece 166 is swingably attached to one end (left end) of the other middle plate 135 by a connecting pin 167, and the connecting piece 166 is attached to the front side of the connecting piece 166. An interference protrusion 168 is provided so as to be bent substantially at a right angle to the axial direction and protrudes toward the first folding unit 100, and a pin along the lateral direction of the accessory is provided on the front side of the connecting piece 166. A hole 169 is provided.

A tip piece 170 is provided at the other end of the accessory S, that is, the end of the other watch band 2, and a pin hole 171 provided in the tip piece 170 is provided at the end of the tip piece 170. By inserting the connecting pin (spring pin) 172 into the pin hole 169 of the connecting piece 166, the other end of the timepiece band 2 can be folded at one end of the other middle plate 134 via the connecting piece 166. These are connected to each other and the other middle plate 135 to form a second folding portion 101.

Then, the interference protrusion 159 provided on the front cover 130 of the first folding part 100 and the second folding part 10 are arranged.
The interlocking expansion mechanism Z is constituted by the interference convex portion 168 provided on the first connecting piece 166.

Next, the mounting and releasing of the wristwatch having the watch band structure having the double-door type clasp structure as described above will be described.

First, after putting a wristwatch as an accessory along the wrist, as shown in FIG.
Is superposed on this outer plate 133 by using the pivotally connected portion of the outer plate 133 as a fulcrum, and the other middle plate 135
Is stored in the other middle plate storage portion 137, and the other watch band 2 is overlapped on the other middle plate 135, and the interference convex portion 168 of the connecting piece 166 is inserted into the first folding portion 100.
Project to the side.

Next, one of the middle plates 134 is attached to the outer plate 1 of the middle plate 134.
By using the pivotally connecting part with 33 as a fulcrum and superposing it on this outer plate 133, one middle plate 134 is housed in one middle plate housing part 136, and the interference projection 168 is formed on the back surface of the interference protrusion 159. Abut. In this state, further one middle plate 1
By pressing 34 toward the outer plate 133 side, the interference projection 168 slides on the inclined back surface 159A of the interference projection 159, whereby the interference projection 159 moves (retracts) against the leaf spring 160, and this interference When the tip portion of the convex portion 168 is exceeded, the interference protrusion 159 is pushed out by the biasing force of the leaf spring 160 and abuts against the back surface side of the interference convex portion 168, and the interference protrusion 159 engages with the interference convex portion 168. To do.

At the same time, the connecting pin 1 is inserted into the locking groove 154.
38 is inserted and locked. In this case, the locking piece portion 156 interferes with the connecting pin 138 and is elastically deformed toward the recessed groove 155 side to ensure the locking of the connecting pin 138 in the locking groove 154.

When the wristwatch is removed from the wrist, the front bar 130 is sandwiched between the thumb and forefinger and pulled outward as shown in FIG.
4 release the locking of the connecting pin 138 to the locking groove 154 of 4,
One of the middle plates 134 is opened to the outside.

By opening the one middle plate 134 to the outside, the interference protrusion 159 of one middle plate 134 is made to move to the other middle plate 1.
The interference convex portion 168 of 35 is pushed outward, and the other middle plate 13
Open 5 outside.

Further, the interference protrusion mechanism portion 131 may have a structure as shown in FIGS. 14 to 16. The interference protrusion 173 of the interference protrusion mechanism 131 is provided with a protrusion-like stopper portion 174 on its surface. The interference protrusion insertion portion 150 in which the interference protrusion 173 is housed is formed by forming a rectangular insertion recess 151 and a stopper moving recess 175 on the bottom surface of the insertion recess 151. The interference protrusion accommodating portion 158 is configured by the lid 157 which is covered with the thick portion 149 and screwed.

The interference protrusion 173 and the leaf spring 160 are inserted into the insertion recess 151 of the interference protrusion insertion portion 150 of the interference protrusion housing 158, and the stopper portion 174 is inserted into the stopper moving recess 175. Then, the interference protrusion 173 is biased toward the second folding portion 101 by the biasing force of the leaf spring 160, the stopper portion 174 abuts against the end surface portion 175A of the stopper moving concave portion 175, and the interference protrusion 173 moves to the first position. 2 is projected to the side of the folded portion 101. In this case, the interference protrusion 173 is provided on the back side of the front cover 130.
Therefore, the interference protrusion 173 can be hidden from the field of view of the wearer, and it is possible to prevent the appearance of the accessory from being deteriorated due to the presence of the interference protrusion 173.

In the second embodiment described above, the first folding part 100 and the second folding part 101 are folded on the outer plate 133, and the first folding part 100 and the outer plate 133 are attached. The first folding part 100 and the outer plate 133 are engaged with each other by the locking mechanism V3, and the double folding mechanism 4 is closed.
Here, when the first folding part 100 is expanded from the outer plate 133, the second folding part 101 is expanded from the outer plate 133 together with the operation by the interlocking expansion mechanism described above.

More specifically, the first folding section 100 is the second folding section.
The interference protrusion 159 protruding toward the folding part 101 is provided. When the first folding part 100 is expanded from the outer plate 133, the interference protrusion 159 interferes with the second folding part 101, and the second folding part 101 is expanded from the outer plate 133, that is, the front side of the accessory. Urge towards. Therefore, the second folding portion 101 expands from the outer plate 133 together with the first folding portion 100.

In this way, the locking mechanism V3 of the first folding part 100 is released, and the first folding part 100 is attached to the outer plate 13.
Since the second folding part 101 is expanded from the outer plate 133 only by expanding the double folding part 3 from 3, the double folding mechanism 4 can be opened with one operation. Therefore, the operation of opening the double-door type clasp structure can be simplified.

In addition, one end portion (one of the watch bands 1) of the accessory in the first folding portion 100 and one middle plate 134.
By connecting the front cover 130 to one end of the front cover 130 and arranging the interference protrusion 159 on the back side of the front cover 130,
The first folding part 100 and the second folding part 101 have the outer plate 1
In the position folded to 33, the interference protrusion 159 is
In order to interfere with the second folding part 101, it is desired that the second folding part 101 is located close to the second folding part 101. The interference protrusion 159 is provided on the front cover 1 of the first folding unit 100.
It is provided on the back side of 30.

The front cover 130 includes the first folding portion 100.
And at a position where the second folding part 101 is folded to the outer plate 133, the second folding part 101 is located on the front side of the second folding part 100,
The second folding portion 101 prevents the operation of expanding from the outer plate 133. That is, the front cover 130 is close to the front side of the second folding portion 101 and presses the second folding portion 101 against the outer plate 133.

Therefore, the interference protrusion 159 is attached to the front cover 130.
If it is attached to the back side of, the interference protrusion 159 is surely positioned near the second folding part 101 when the first folding part 100 and the second folding part 101 are folded on the outer plate 133. be able to. Therefore, if the interference protrusion 159 is attached to the back side of the front cover 130, it can be easily performed.
In addition, the interference protrusion 159 can be reliably interfered with the second folding portion 101.

Furthermore, by providing the interference protrusion 159 on the back side of the front cover 130, the interference protrusion 159 can be hidden from the visual field of the wearer, and the appearance of the accessory can be prevented from being deteriorated due to the presence of the interference protrusion 159.

Further, a connecting piece 166 connected to the other end of the accessory in the second folding portion 101 and one end of the other middle plate 135 is provided, and the connecting piece 166 has a first connecting piece 166.
The interference protrusion 168 protruding toward the folded portion 100 is formed, and the back surface of the interference protrusion 168 is formed on the back surface of the interference protrusion 159.
The interference projection 1 can be easily and reliably interfered with by
59 can be made to interfere with the second folding part 101.

In this case, the simplest method is that when the first folding part 100 and the second folding part 101 are folded on the outer plate 133, the first folding part 100 is formed.
That is, the protrusion interference 159 is located on the back side of the connection end of the second folding part 101. As a universal method, when the first folding part 100 is expanded from the outer plate 133, the connection end of the second folding part 101 is positioned within a range where the interference protrusion 159 is about to move. It is to let.

Further, the location where the interference protrusion 159 interferes is
Since there is a risk of being scratched or worn, only the connecting piece 166 including the interference convex portion 168 can be made of a hard metal material.

Further, the interference protrusion 159 is movably provided along the longitudinal direction of the accessory and is biased toward the second folding portion 101 by the leaf spring 160 which is an elastic biasing means. In the process of folding the first folding part 100 toward the outer plate 133 after the second folding part 101 is folded to the outer plate 133, the interference protrusions 159 of the first folding part 100 firstly form the second folding part 100. Part 10
1 against the urging force of the leaf spring 160, and retracts toward the first folding portion 100 along the longitudinal direction of the accessory while resisting the biasing force of the leaf spring 160. When the first folding section 100 is further moved toward the outer plate 133, the interference protrusion 159 causes the second folding section 101 to move.
Beyond. Then, the biasing force of the leaf spring 160 causes the interference protrusion 159 to project toward the second folded portion 101,
It is located on the back side of the second folding part 101.

As a result, the first folding portion 100 and the second folding portion 100
When the folding part 101 of the first folding part 101 and the folding part 101 of the second folding part 10 are folded to the outer plate 133, the interference protrusion 159 of the first folding part 100 is inserted into the second folding part 10.
It can be easily located on the back side of 1. Therefore, the interference protrusion 159 can be easily and surely attached to the second folding portion 101.
Can be interfered with.

In this structure, if the first folding part 100 is locked to the outer plate 133, the second folding part 101 is pressed down by the first folding part 100 to the outer plate 133 to form a double door clasp structure. Are suitable.

Further, an interference protrusion accommodating portion 158 is provided on the back side of the front cover 130 along the longitudinal direction of the accessory, and the interference protrusion accommodating portion 158 has an interference protrusion 159 and the interference protrusion 159 in the second folding portion 101. By inserting and arranging the leaf spring 160 that urges the interference protrusion 159, which is movable along the longitudinal direction of the accessory and is urged toward the second folding portion 101, the interference protrusion 159 of the front cover 130 is provided. It can be easily attached to the back side.

(Embodiment 3) Embodiment 3 of the double-door type clasp structure according to the present invention is shown in FIGS.

The double-door type clasp structure according to the present invention is assembled to an accessory S, which is connected to a wrist watch (not shown) and one band attachment portion (not shown) of the wrist watch. One of the watch bands 1 is formed, the other watch band 2 is connected to the other band attaching portion (not shown) of the wristwatch, the push locking mechanism 3, and the double folding mechanism 4 for folding the double door. .

The double-folding double folding mechanism 4 is provided with an outer plate 36 having an engaging pin 35 which is an outer plate side engaging portion, and one and the other inner plates 37, 38, and the left end of the outer plate 36. Connecting portions 36A, 36B are formed on the right and left ends,
Further, as shown in FIG. 24, the engagement pin 35 is attached to the central portion thereof, and the middle plate fitting portions 39A and 39B are formed on the left and right with the engagement pin 35 sandwiched therebetween. Engagement holes 36C, which are pivot projection engagement portions, are provided on both sides of the left side portion of the plate 36. The engagement pin 35 has a shaft portion 35.
The umbrella portion 35b is formed at the tip of a.

The one middle plate 37 has connecting portions 40 and 41 at its left end and right end, respectively, and an engaging recess 42 is formed at the left end thereof. The other middle plate 38 has connecting portions 48 and 49 at its left end and right end, respectively, and an engaging recess 50 is formed at its left end. A lock mechanism 43 is provided on one end side of the other middle plate 38. As shown in FIG. 25, the lock mechanism 43 is provided with pivot protrusion holding members 45 at both ends of a hole 44 formed in the intermediate plate 38, and the pivot protrusions 46 are slidably provided by these pivot protrusion holding members 45. , A spring 47 is interposed between these pivot protrusions 46 to allow both pivot protrusions 4 to
6 is projected outward. Then, the pivot protrusion 46 and the engagement hole 36C constitute a second locking mechanism.

The right end of the outer plate 36 is connected to the end of one middle plate 37 by connecting the connecting portions 36B and 40 to each other by pin connection, and the left end of the outer plate 36 is connected to the other middle plate 38. End portions of the connecting portions 36A and 48 are connected to each other by pin connection. Further, the piece 1A at the end portion of the one watch band 1 is connected to the end portion of the one middle plate 37 via the connecting piece 51, and these constitute the first folding portion 100.

Further, the other end portion of the middle plate 38 is connected to the end piece 2A of the other timepiece band 2 through a connecting piece 52, and these constitute the second folding portion 101. However, the connecting piece 52 is provided with an interference convex portion 53.

The push locking mechanism 3 is attached to one of the folding parts 100. That is, the push locking mechanism 3 includes the inner retaining frame main body 3A, the push button mechanism section 5, and the interlocking expansion mechanism 9 which is an intermediate plate expanding means, and the inner retaining frame main body 3A has a front plate. 10 and a cover 11 are provided, a pin hole 10A is provided on the right side of the front plate 10 along the lateral direction of the accessory, and the front plate 10 uses the pin hole 10A to form one middle plate. Connecting piece 5 at the end of 37
1 and the piece 1A at the end portion of one of the watch bands 1 are connected by a connecting pin 10A so as to be capable of swinging (raising and lowering).

As shown in (1) and (2) of FIG. 19, the front plate 10 has a connecting piece inserting portion 12B at one end in the longitudinal direction of the accessory on the back surface of the surface portion 12, and a connecting portion 12A at the other end. Are formed respectively. A recess 13 and a pair of fixing pin locking holes 14 are formed on the back surface of the surface 12.

As shown in FIG. 20, the cover 11 has wall surface portions 16a and 16b formed at both ends of the surface portion 15, and the surface portion 15 has a hole 17 and a pin hole 18. Further, an opening 19 is formed in the wall surface portion 16a on the left side.

The cover 11 is fixed to the front plate 10 by fixing the fixing pin 20 press-fitted into the pin hole 18 into the fixing pin locking hole 14 of the front plate 10, and the hole portion 17 Faces the recess 13. Then, the push button insertion portion 21 which is an insertion space between the cover 11 and the front plate 10.
However, detachable piece loading portions 30 that are part of the insertion space including the opening 19 of the cover 11 are also formed. Then, the fixing pin 20 is arranged in the push button insertion portion 21 so as to be separated in the lateral direction of the accessory.

The push button mechanism section 5 is provided with one and the other push buttons 22 and 23 and two springs 24.
22 has a button body 25 having a push portion 25A formed at the end as shown in FIG. 22, and the button body 25 has an opening 26 along the lateral direction of the accessory and an end portion of the opening 26. A continuous spring accommodating portion 26A is formed, and an arc-shaped engaging portion 27 is formed on the front side of the opening 26. In addition, a guide hole 28, which is a long hole extending in the lateral direction of the accessory, is formed substantially in the center of the button body 25, and the end portion of the button body 25 in the accessory longitudinal direction serves as a spring receiving portion 29. There is.

The other push button 23 is shown in FIG.
As shown in FIG. 1, since the push button 22 has substantially the same structure as that of the one push button 22, parts having the same structure are denoted by the same reference numerals and the description thereof will be omitted. An arc-shaped engaging portion 27 is formed on the front side of the opening 26.

Then, in the push button charging section 21,
One push button 22 from one end side in the lateral direction of the accessory
However, the other push button 23 is inserted from the other end side, and the spring accommodating portion 26A of one push button 22 accommodates a spring 24 which is an elastic biasing means. Push button 2
3 is urged outward in the lateral direction of the accessory, and one fixing pin 20 is inserted in the guide hole 28 of one push button 23.
Pierces through, and the fixing pin 20 serves as a stopper.

A spring 24, which is a button-side elastic biasing means, is accommodated in the spring accommodating portion 26A of the other push button 23. This spring 24 pushes the other push button 23 outward in the lateral direction of the accessory. The other fixed pin 20 penetrates through the guide hole 28 of the other push button 22, and this fixed pin 20 serves as a stopper. Then, by the urging force of the spring 24, the one and the other push buttons 22, 23
Are spaced apart from each other, and the engaging portions 27 of the one and the other push buttons 22 and 23 face each other, and these constitute a button side engaging portion. Further, the push portions 25A of the push buttons 22 and 23 project outward from the push button loading portion 21 and project laterally of the front plate 10.

The interlocking expansion mechanism 9 is the detachable piece charging section 3
0 is composed of an attachment / detachment piece 31 which is an interference protrusion and a spring 32A which is an elastic biasing means. The attachment / detachment piece 31 has an interference portion as shown in (1) and (2) of FIG. A stopper 33 is formed on the base of the claw 32, and a spring receiving portion 34 is formed on the rear end surface of the attachment / detachment piece 31. The claw portion 32 has the interference surface portion 32.
a and a slope 32B on the back side thereof.

The detachable piece 31 has its claw portion 32.
Is provided slidably in the opening 19 of the cover 11 and is provided in the attachment / detachment piece loading portion 30, and the spring receiving portion 34 of the attachment / detachment piece 31 and the one and the other push buttons 22, 2 are provided.
3 is provided between the spring receiving portion 29 and the spring 32.
A is interposed, and the attachment / detachment piece 31 is urged by the spring force of the spring 32A so that the stopper portion 33 comes into contact with the end edge portion of the opening portion 19 and the claw portion 32 causes the connection piece insertion portion. 12B, the claw portion 32 is hidden under the front plate 10.

Next, the mounting and unmounting of the wristwatch having the watch band structure having the double door clasp structure constructed as described above will be described.

First, after putting a wristwatch, which is an accessory, along the wrist, the other middle plate 38 is superposed on the outer plate 36 with the pivotal connection portion of the middle plate 38 and the outer plate 36 as a fulcrum. The engaging recessed portion 50 of the plate 38 is replaced with the middle plate fitting portion 3 of the outer plate 36.
9A is fitted and locked, and the pivot projection 46 of the lock mechanism 43 is engaged with the engagement hole 36C of the outer plate 36.

Then, the one middle plate 37 is replaced with the outer plate 3 of this.
6 is used as a fulcrum and is superposed on the outer plate 36 so that the engaging recess 42 of the middle plate 37 is fitted and locked in the middle plate fitting part 39B of the outer plate 36, and 36 is inserted into the hole 17, and the engagement pin 35
Are engaged with the button-side engaging portions, that is, the engaging portions 27 of the one and the other push buttons 22 and 23 facing each other, and the wristwatch is mounted on the wrist.

In this case, the claw portion 3 of the detachable piece 31 is attached to the interference convex portion 53 of the connecting piece 52 at the end portion of the other watch band 2.
The slope 32B on the back side of 2 comes into contact with the other middle plate 3
By the pushing of 7, the attachment / detachment piece 31 retracts against the spring 32A, and when the claw portion 32 exceeds the interference convex portion 53, the attachment / detachment piece 31 advances by the urging force of the spring 32A and the claw portion 32 moves. The interference surface portion 32a contacts the interference convex portion 53. In this case, the connecting piece 52 is inserted into the connecting piece inserting portion 12B of the front plate 10.

The engagement pin 35 is engaged with the engagement portion 27 by the umbrella portion 35b at the end of the engagement pin 35 between the engagement portions 27 of the one and the other push buttons 22 and 23. When the shaft portions 35a of the engagement pins 35 are inserted and pushed apart from each other in the lateral direction of the accessory, the engagement portions 27 of the one and the other push buttons 22 and 23 are closed by the urging force of the spring 24. Shaft portion 35 of the engaging pin 35
It is performed by engaging with a.

When the wristwatch is removed from the wrist, the push portions 25A of the one and the other push buttons 22 and 23 are sandwiched between the thumb and the index finger and pushed inward to push the one and the other push buttons 22 and 23. Is moved against the spring 24 to open the space between the engagement portions 27 to release the engagement, open the other middle plate 37 to the outside, and to disengage the engagement recess 42 of the other middle plate 37. The engaging pin 35 is pulled out from the hole 17 by removing it from the middle plate fitting portion 39B of the plate 36, and the push locking mechanism 3 is removed from the outer plate 36. By this operation, the attachment / detachment piece 3 of the push locking mechanism 3
With the claw portion 32 of one, the connecting piece 5 at the end of the one watch band 1
By pushing the interference convex portion 53 of No. 2 outward, one intermediate plate 38 is opened to the outside, and the engaging concave portion 50 of one intermediate plate 38 is opened.
Is removed from the middle plate fitting portion 39A of the outer plate 36, and the pivot protrusion 46 of the lock mechanism 43 is engaged with the engaging hole 36C of the outer plate 36.
Then, the watch band 1 on one side and the watch band 2 on the other side are disconnected from each other.

In the third embodiment described above, the engagement between the engagement portion 27 of the push buttons 22 and 23 and the engagement pin 35 is released by pushing the one and the other push buttons 22 and 23. Then, the push locking mechanism 3
When the is removed from the outer plate 36, the one and the other middle plates 38 and 37 can be expanded with respect to the outer plate 36 in conjunction with this operation, and one and the other can be performed by one operation. The inner plates 38, 37 can be double-sided, and the operability is improved.

(Embodiment 4) Embodiment 4 of the present invention is shown in FIGS. In the fourth embodiment, the structure of the interlocking expansion mechanism is different from that of the interlocking expansion mechanism 9 of the above-described third embodiment, and one and the other of the push buttons 22 and 23 of the push button mechanism section 5 are also configured. Since the other configurations are the same although the shapes are different, the same reference numerals are given to the same components and the description thereof will be omitted.

That is, cam slopes 56A and 56B are formed at the other end edges of the push-buttons 22 and 23 on the side of the other watch band 2 to form cam slopes 56A and 56B that expand outward. The interlocking expansion mechanism 9 is composed of an attachment / detachment piece 56 which is an interference protrusion provided on the attachment / detachment piece loading portion 30 and a spring 57 which is an elastic biasing means. A stopper at the base of the attachment / detachment piece 56. At both ends of the portion 33 in the lateral direction of the accessory, a copying protrusion 58 formed of an inclined surface that expands outward similarly to the cam inclined surfaces 56A and 56B.
A and 58B are formed, and a spring receiving portion 59 is formed below the stopper portion 33.

The detachable piece 56 has the claw portion 32.
Is attached to the attachment / detachment piece insertion portion 30 by inserting it into the opening 19 of the cover 11, and the attachment / detachment piece 56 is provided with a spring 57 interposed between the spring receiving portion 59 and the wall surface portion 16a of the cover 11. The stopper 33 is inserted between the cam slopes 56A and 56B of the push buttons 22 and 23 on one side and the other push button 22 and 23, respectively, and the copying protrusions 58A and 58B are formed on the cam slopes. 56
It is in sliding contact with A and 56B. Therefore, the claw portion 32 of the detachable piece 56 is retracted into the push button mechanism portion 5 as shown in (1) and (2) of FIG.

Therefore, when the wristwatch is mounted on the wrist as in the case of the third embodiment, the detachable piece 56 is attached.
The claw portion 32 of the connecting piece 52 on the end of the other watch band 1
Does not come into contact with the interference convex portion 53.

When the wristwatch is removed from the wrist, the push portions 25A of the one and the other push buttons 22 and 23 are sandwiched between the thumb and the index finger and pushed inward to push the one and the other push buttons 22 and 23. Is moved against the spring 24 to open the engagement between the engaging portions 27 to release the engagement, open the other middle plate 38 to open the push locking mechanism 3 to the outside, and at the same time, to move the other middle plate. 38
The engaging concave portion 42 is removed from the middle plate fitting portion 39B of the outer plate 36, the engaging pin 35 is pulled out from the hole 17, and the push locking mechanism 3 is removed from the outer plate 36. By pushing the pushing portion 25A of the push buttons 22 and 23 of the push button 22 and 23 inward with the thumb and forefinger, the detachable piece 56 is pushed against the spring 57 by the cam slopes 56A and 56B through the copying protrusions 58A and 58B. It is pushed out to the watch band 2 side, the claw portion 32 is projected from the opening 19 and brought into contact with the back surface of the interference convex portion 53 of the connecting piece 52 at the end of the other watch band 2.

The push locking mechanism 3 is attached to the outer plate 3
By the operation of opening the push locking mechanism 3 to the outside so as to remove it from 6, the claw portion 32 of the attachment / detachment piece 56 causes the interference projection 53 of the connection piece 52 at the end of the other watch band 2 to move outward. By pushing, the other middle plate 38 is opened to the outside, and the middle plate 3
8 is removed from the middle plate fitting portion 39A of the outer plate 36, and the pivot protrusion 46 of the lock mechanism 43 is fixed to the outer plate 3.
6 from the engaging hole 36C.

In the fourth embodiment described above, the engaging portion 27 of the push buttons 22 and 23 and the engaging pin 3 are operated by pushing the one and the other push buttons 22 and 23.
When the push locking mechanism 3 is disengaged from the outer plate 36 by releasing the engagement with 5, the one and the other middle plates 37 and 38 are expanded with respect to the outer plate 36 in conjunction with this operation. It can be opened and one and the other middle plate 37 can be opened in one operation.
38 can be double-sided and the operability is improved.

Further, since the attaching / detaching piece 56 is recessed in the push locking mechanism 3, the appearance is improved, and when the middle plate 37 is closed, the claw portion 32 of the connecting piece 56 has an interference convex portion. Since it does not abut against 53, wear, bending, or breakage of the connecting piece 56 can be prevented, and it is therefore possible to remove the wristwatch satisfactorily for a long period of time.

Although the pivot projections 46 are provided on both sides of the lock mechanism 43, the pivot projections 46 may be provided on only one side as shown in FIG.
The locking mechanism 43 having the pivot projection 46 is provided on the outer plate 36, and the locking hole 36C serving as the pivot projection locking portion is provided on the outer plate 36. As shown in FIGS.
6 may be provided with a lock mechanism 43 having a pivot projection 46, and an engagement hole 36C as a pivot projection engagement portion may be provided in the connecting portion 49 of the intermediate plate 38.

(Fifth Embodiment) FIG. 31 shows a fifth embodiment of the present invention. In the fifth embodiment, the structure of the interlocking expansion mechanism is different from that of the interlocking expansion mechanism 9 of the above-described third embodiment, and the other configurations are the same. Therefore, the same parts are denoted by the same reference numerals. And the description is omitted.

That is, the attachment / detachment piece 60, which is the interference protrusion of the interlocking expansion mechanism 9, has a bifurcated claw portion 32 which is an interference portion, and the stopper portion 3 which is provided at the base of the claw portion 32 so as to project upward.
3 and the opening 19 of the cover 11
Is widened, and an interference convex portion 53 is formed at the end of the piece 2A at the end of the other watch band 2. The detachable piece 60 is inserted into the opening portion 19 of the cover 11 and provided in the detachable piece loading portion 30.
It is biased by the spring force of the spring 32A, the stopper portion 33 is in contact with the upper edge portion of the opening 19 of the cover 11, and the claw portion 32 is the connecting piece insertion portion 1
2B, the claw portion 32 is hidden under the front plate 10.

Therefore, when the wristwatch is mounted on the wrist as in the case of the third embodiment, the attaching / detaching piece 3 is attached to the interference convex portion 53 of the piece 2A at the end of the other watch band 2.
The interference surface portion 32a of the first claw portion 32 abuts.

When the wristwatch is removed from the wrist, the push portions 25A of the one and the other push buttons 22 and 23 are sandwiched between the thumb and the index finger and pushed inward to push the one and the other push buttons 22 and 23. Is moved against the spring 24 to open the engagement between the engaging portions 27 to release the engagement, open one of the intermediate plates 37 to open the push locking mechanism 3 to the outside and 37
The engaging concave portion 42 is removed from the middle plate fitting portion 39B of the outer plate 36, the engaging pin 35 is pulled out from the hole 17, and the push locking mechanism 3 is removed from the outer plate 36. The claw portion 3 of the attachment / detachment piece 60 of the push locking mechanism 3
At 2, the other intermediate plate 38 is opened to the outside by pushing the interference convex portion 53 of the piece 2A at the end of the other watch band 2 outward.

In the fifth embodiment described above, the engaging portions 27 of the push buttons 22 and 23 and the engaging pin 3 are operated by pushing the one and the other push buttons 22 and 23.
When the push locking mechanism 3 is disengaged from the outer plate 36 by releasing the engagement with 5, the one and the other middle plates 37 and 38 are expanded with respect to the outer plate 36 in conjunction with this operation. It can be opened and one and the other middle plate 37 can be opened in one operation.
38 can be double-sided and the operability is improved.

(Sixth Embodiment) A sixth embodiment of the present invention is shown in FIGS. In the sixth embodiment, the interlocking expansion mechanism and the push button mechanism section are different in the configurations of the interlocking expansion mechanism 9 and the push button mechanism section 5 of the third embodiment described above, but the other configurations are the same. Therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

That is, the one-way push button 22 has a button body 25 having a push portion 25A formed at the end as shown in FIG. 34, and the push portion 25A of this button body 25 is formed.
On the side opposite to the contact surface 61 along the longitudinal direction of the accessory,
One inclined cam portion 62 located on one of the contact surfaces 61 on the side of the watch band 1 is provided, and the button body 25 is also provided.
A guide hole 63, which is a long hole extending in the lateral direction of the accessory, is formed at substantially the center of the guide. The inclined cam portion 62 has a cam inclined surface 64 inclined toward the other watch band 2 side, and the dimension of the base portion 62a in the longitudinal direction of the accessory is L1, its height is H1, and the inclination angle is It is α degrees.

The other push button 23 has almost the same structure as the one push button 22, but the tilt cam portion is different. That is, the inclined cam portion 65 has a cam inclined surface 66 inclined toward the other watch band 2 side, and the dimension of the base portion 66a in the hand longitudinal direction is L2 (>).
L1), the height is H2 (<H1), and the inclination angle is α degrees in the direction opposite to the inclination angle of the cam slope 64 of the one inclined cam portion 62. The top end face 65b is larger than the top end face 62b of the one inclined cam portion 62.

In addition, the interlocking expansion mechanism 9 in the sixth embodiment.
Is composed of an attachment / detachment piece 67 which is an interference protrusion provided on the attachment / detachment piece loading portion 30 and a spring 57 which is an elastic biasing means. The attachment / detachment piece 67 is shown in FIGS.
As shown in FIG.
Has a claw portion 32 as an interference portion at one end thereof, and has a planar U-shaped notch portion 69a having a recess at the center portion at the other end thereof. Notch 69
An inclined surface 69b that is inclined toward a is formed,
The cutout portion 69a is formed in the clasp side engaging portion 69. Further, at both ends of the piece main body 33 in the lateral direction of the accessory, one and the other copying inclined surfaces 68A and 68B, which are inclined surfaces similar to the cam inclined surfaces 64 and 66, are formed. A spring receiving portion 59 is formed on the side.

Then, the push button charging section 21 has
One push button 22 from one end side in the lateral direction of the accessory
However, the other push button 23 is inserted from the other end side, and the guide hole 6 of the one push button 22 is inserted.
One fixing pin 20 penetrates through 3, and this fixing pin 20 serves as a stopper. Further, the other fixing pin 20 penetrates through the guide hole 63 of the other push button 22, and this fixing pin 20 serves as a stopper.

The attachment / detachment piece 67 has the claw portion 32.
Is provided in the attachment / detachment piece loading portion 30 so as to face the opening portion 19 of the cover 11, and the attachment / detachment piece 67 is provided in the spring receiving portion 5.
9 and the wall surface portion 16a of the cover 11 are urged in the direction of one watch band 1 by a spring 57, and the stopper portion 33 is interposed between the push buttons 22 and 23 on one side and the other side. One of the profile inclined surfaces 68A is in contact with the cam inclined surface 64 of the inclined cam portion 62 of the one push button 22, and the top end surface 65b of the inclined cam portion 65 of the other push button 23 is inserted and removed. Is in contact with the side surface of the. For this reason, as shown in (1) of FIG. 33, the claw portion 32 of the attachment / detachment piece 56 is retracted into the push button mechanism portion 5.

Therefore, in the same manner as in the case of the above-mentioned third embodiment, the double-folding double folding mechanism 4 is folded and the engaging pin 3 is formed.
5 is inserted into the hole 17, and the button-side engaging portion 69 of the attaching / detaching piece 56 is moved in the longitudinal direction of the accessory against the spring 57 by the umbrella portion 35b at the end of the engaging pin 35 to engage the engaging portion. When the shaft portion 35a of the pin 35 is inserted, the button side engaging portion 69
Is closed by the urging force of the spring 57 and the engagement pin 3
The wristwatch is mounted on the wrist by engaging with the shaft portion 35a of No. 5. In this case, the claw portion 32 of the attachment / detachment piece 67 is not in contact with the interference convex portion 53 of the connection piece 52 at the end of the one watch band 1.

When the wristwatch is removed from the wrist, the pushing portions 25A of the one and the other push buttons 22 and 23 are sandwiched between the thumb and the forefinger and pushed inward, so that the state shown in (2) of FIG. 33 is obtained. As shown, one push button 22 moves inward, the cam slope 64 of the inclined cam portion 62 slides on the sloping inclined surface 68A, and the attachment / detachment piece 67 is moved by one stroke amount of the attachment / detachment piece 67. Push it against the spring 57 for 1/2 minute. Therefore, the top end surface 65b of the other inclined cam portion 65 is displaced from the side surface of the attachment / detachment piece 67, and the sloping inclined surface 68B is located on the extension of the cam inclined surface 66 of the inclined cam portion 65.

Then, when the other push button 23 is pushed, the cam slope 66 of the inclined cam portion 65 slides on the sloping slope surface 68B so that the detachable piece 67 remains in the stroke amount of the detachable piece 67. Push out against the spring 57 for 1/2 minute. For this purpose, the detachable piece 67
The claw portion 32 of the above-mentioned protrudes from the opening portion 19 and comes into contact with the back surface of the interference convex portion 53 of the connecting piece 52 at the end portion of the other watch band 2.

Then, the push locking mechanism 3 is attached to the outer plate 3
By the operation of opening the push locking mechanism 3 to the outside so as to remove it from 6, the claw portion 32 of the detachable piece 67 causes the interference convex portion 53 of the connecting piece 52 at the end of the other watch band 2 to move outward. By pushing, the other middle plate 38 is opened to the outside, and the middle plate 3
8 is removed from the middle plate fitting portion 39A of the outer plate 36, and the pivot protrusion 46 of the lock mechanism 43 is fixed to the outer plate 3.
The watch band 1 on one side and the watch band 2 on the other side are disengaged from each other by disengaging from the engaging hole 36C of No. 6.

In the sixth embodiment, the engagement between the button side engaging portion 69 of the detachable piece 67 and the engaging pin 35 is released by pushing the one and the other push buttons 22, 23. The push locking mechanism 3 is attached to the outer plate 36.
When removed from the above, the one and the other middle plates 37, 38 can be expanded with respect to the outer plate 36 in conjunction with this operation, and one and the other middle plates 37, 38 can be operated by one operation. 38 can be double-opened and the operability is not good, and the two springs 24 in the double-door open type clasp structure of Embodiments 3 to 5 described above can be dispensed with, and built-in. Time workability is improved.

Also, instead of the button-side engaging portions of the one and the other push buttons 22 and 23 in the double-door type clasp structure of Embodiments 3 to 5, the button-side engaging portion 69 is attached to the detachable piece 67. By providing the above, it is not necessary to form the button side engaging portion on the one and the other push buttons 22 and 23, and the processing load of each component can be reduced.

Further, the push buttons 22 on one side and the other side,
The engagement between the first folding portion 100 and the outer plate 36 is not released unless the two 23 are pressed together. Therefore, even if an unintended external force is applied to either the one push button or the other push button, the engagement between the first folding portion and the outer plate is not released, so that the double-door clasp does not open accidentally.

Further, the push buttons 22 on one side and the other side,
As long as 23 is not pressed together, the attachment / detachment piece 67, which is an interference protrusion that is recessed in the first folding portion 100, is not attached to the second folding portion 10.
Since it does not completely project toward 1, the detachable piece 67 can be hidden from the view of the wearer. Therefore, the appearance of the accessory is improved.

It should be noted that the interference convex portion 53 with which the claw portions 32 of the attachment / detachment pieces 31, 56, 67 interfere may be provided at the end portion of one of the intermediate plates 37.

[0168]

As described above, according to the double-door double clasp structure according to the invention of claim 1, the first folding portion in which one end of one middle plate is connected to one end of the accessory, and the accessory A second folding portion in which one end of the other middle plate is connected to the other end of the other middle plate, the other end of the one middle plate is connected to one end of the outer plate, and the other middle plate is connected to the other middle plate. In a double-door clasp structure with an end connected to the other end of the outer plate, the first folding part includes a locking mechanism for releasably engaging the first folding part with the outer plate. Includes an interference protrusion protruding toward the second folding portion, and releasing the locking mechanism from a position where the first folding portion and the second folding portion are folded by the outer plate. Interlocking the interference protrusion with the second folding part in conjunction with the operation of expanding the first folding part from the outer plate. By providing the interlocking expansion mechanism for expanding from the outer plate, the first folding part and the second folding part are folded on the outer plate, and the locking mechanism attached between the first folding part and the outer plate. As a result, the first folding portion and the outer plate are engaged with each other, and the double door clasp is closed. Here, when the first folding part is expanded from the outer plate, the second expanding part is expanded from the outer plate together with the operation by the interlocking expansion mechanism.

More specifically, the first folding portion is provided with an interference protrusion protruding toward the second folding portion. When the first folding part is expanded from the outer plate, the interference protrusion interferes with the second folding part, and biases the second folding part from the outer plate in the direction of expanding, that is, toward the front side of the accessory. . Therefore,
The second folding portion expands from the outer plate together with the first folding portion.

As described above, only by releasing the locking mechanism of the first folding part and expanding the first folding part from the outer plate, both the second folding parts expand from the outer plate. So, you can open the double door type Nakadome with a single operation. Therefore, the operation of opening the double-door type clasp can be simplified.

According to the double door clasp structure of the invention of claim 2, in the double clasp structure of the double door structure according to claim 1, one of the one end and the one of the accessories in the first folding portion is provided. By connecting the front cover to one end of the plate and arranging the interference protrusion on the back side of the front cover, not only the same operation as the operation of the invention of the above-described claim 1 can be achieved, but also the first In the position where the folded portion and the second folded portion are folded on the outer plate, the interference protrusion is desired to be in a position close to the second folded portion in order to interfere with the second folded portion. Such an interference protrusion is preferably provided on the back side of the front cover of the first folding portion.

The front cover is located on the front side of the second folding part at the position where the first folding part and the second folding part are folded on the outer plate, and the second folding part is more than the outer plate. Suppress the action of expanding. That is, the front cover is close to the front side of the second folding portion and presses the second folding portion against the outer plate.

Therefore, if the interference protrusion is provided on the back side of the front cover, the interference protrusion can be surely brought close to the second folded portion when the first folding portion and the second folding portion are folded on the outer plate. You can position where you did. Therefore,
If the interference protrusion is attached to the back side of the front cover, the interference protrusion can be easily and reliably caused to interfere with the second folding portion. Furthermore, by providing the interference protrusion on the back side of the front cover, it is possible to hide the interference protrusion from the field of view of the wearer and prevent the appearance of the accessory from being deteriorated due to the presence of the interference protrusion.

Further, according to the double-door type clasp structure of the invention of claim 3, in the double-folding clasp structure of the double door structure of claim 1 or 2, the interference protrusion is provided in the second folding portion. By constructing the other end of the accessory to interfere with the connecting end portion in which the other end portion of the middle plate is connected, the same operation as the operation of the above-described invention of claim 1 can be achieved, and When the folding part and the second folding part are folded on the outer plate, it is the connecting end that is located closest to the first folding part in the second folding part.
Therefore, if the interference protrusion of the first folding portion is made to interfere with the second descending folding portion, the connection end portion of the second folding portion is most likely to interfere. That is, if it is the connecting end portion of the second folding portion, it is possible to easily and surely interfere with the projection interference.

[0175] Further, according to the double door clasp structure of the invention of claim 4, in the double clasp structure of the double door structure according to the third aspect, the other end of the accessory in the second folding portion is provided at the connecting end. A connecting piece connected to one end of the other middle plate is provided at the end portion, and an interference convex portion protruding toward the first folding portion is formed on the connecting piece, and the interference convex portion is formed. By interfering the back surface of the above with the interference protrusion, not only the same operation as the operation of the above-described invention of claim 3 (claim 1) can be achieved, but also the second folding part is directed toward the first folding part. Since the interfering protrusions are additionally provided and the interfering protrusions interfere with the back surface of the interfering protrusions, the interfering protrusions can easily and reliably interfere with the second folding portion.

According to a fifth aspect of the double-door clasp structure of the present invention, the interference protrusions extend along the longitudinal direction of the clothing accessory. By being movably provided and urged toward the second folding portion by the elastic urging means, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but also the second operation. After the folding part is folded on the outer plate, in the process of folding the first folding part toward the outer plate, the interference protrusion of the first folding part first comes into contact with the second folding part, and the elastic biasing means. Withdrawing toward the first folding portion along the longitudinal direction of the accessory while resisting the biasing force of. When the first folding portion is further moved toward the outer plate, the interference protrusion crosses the second folding portion. Then, due to the urging force of the elastic urging means, the interference protrusion projects toward the second folding portion and is located on the back side of the second folding portion.

Thus, when the first folding portion and the second folding portion are folded on the outer plate, the interference protrusion of the first folding portion can be easily located on the back side of the second folding portion. Therefore, the interference protrusion can easily and surely interfere with the second folded portion.

This structure is suitable for a double door clasp type clasp in which the first folding portion locks the outer plate with the first folding portion to press the second folding portion against the outer plate.

[0179] According to the double-door type clasp structure of the present invention according to the sixth aspect, in the double-door clasp structure of the double door type according to any one of the first to fifth aspects, the accessory longitudinal direction is provided on the back side of the front cover. By disposing the interference protrusion accommodating portion along the line, and inserting and arranging the interference protrusion and the elastic biasing means for biasing the interference protrusion toward the second folding part in the interference protrusion accommodating portion, Not only can the same effects as those of the invention of claim 1 described above be exerted, but also an interference protrusion movable along the longitudinal direction of the accessory and biased toward the second folding portion can be easily provided on the back side of the front cover. Can be attached to.

According to the double-door double clasp structure according to the invention of claim 7, in the double-fold double clasp structure of any of claims 1 to 6, the locking mechanism is provided on the front plate. A push locking mechanism additionally provided, wherein the push locking mechanism is slidable in the insertion space provided on the front plate along the lateral direction of the accessory and along the lateral direction of the accessory. A push button to be disposed, a button side engaging portion provided on the push button, a button side elastic biasing means for biasing the push button outward along a lateral direction of the accessory, and the outer side An outer plate side engaging portion provided on the plate, wherein the button side elastic urging means urges the button side engaging portion toward the outer plate side engaging portion, and the button side engaging portion. Part and the outer plate side engaging part engage with each other, When the button is pressed against the urging force of the button-side elastic urging means, the button-side engaging portion is separated from the outer-plate-side engaging portion and the engagement is released. The interference protrusion is movably provided along a longitudinal direction of the accessory and is biased toward the second folding portion by the elastic biasing means. Not only the same operation as the above can be achieved, but also the interference that arranges part of the insertion space of the push button in the push locking mechanism by inserting the interference projection and the elastic biasing means for biasing the interference projection. By using it as the projection insertion portion, the space required for the push locking mechanism becomes a space along the lateral direction of the accessory mainly required for the insertion space. Since the space required for this push locking mechanism and the space required for the interference projection insertion part along the longitudinal direction of the accessory can be overlapped in a plane, the space required for both the push locking mechanism and the interference projection insertion part is greatly increased. Can be made smaller. this is,
This means that the front plate including the push locking mechanism and the interference protrusion can be downsized. As a result, the double-door type clasp structure can be made compact.

Further, one push button and the other push button are inserted inside the insertion space so as to face each other along the lateral direction of the accessory, and one and the other push buttons are engaged with the outer plate side engaging portions. In the case of the dual push locking mechanism, if the interference protrusion and the elastic biasing means are arranged between the one push button and the other push button, the required space can be significantly reduced. At this time, the elastic biasing means may be arranged between the interference projection and the push button so that the elastic biasing means can be bent between the interference projection and the push button.

Further, according to the double door clasp structure of the eighth aspect of the present invention, in the double door clasp structure of any one of the first to fourth aspects, the first folding part is attached to the accessory longitudinal direction. The interference protrusion movably provided along the direction, elastic biasing means for biasing the interference protrusion in a direction to be retracted into the first folding portion, and a push arranged on the first folding portion. A push button is pushed by finger pressure to move the interference protrusion that is recessed in the first folding portion against the bias of the elastic biasing means and project from the first folding portion. By providing the cam means for making it possible, not only the same effect as the operation of the invention of the above-mentioned claim 1 can be achieved, but also the interference projection is provided with the first folding by the biasing force of the elastic biasing means unless the push button is pressed. Immerse yourself in the club . When the push button is pressed at the position where the first foldable portion and the second foldable portion are folded on the outer plate, the interference protrusions that are recessed in the first folded portion are urged by the elastic biasing means by the cam means. And moves along the longitudinal direction of the accessory, and protrudes from the first folding portion.
Next, when the first folding portion is opened from the outer plate, the protruding interference protrusion interferes with the second folding portion, and the second folding portion is expanded from the outer plate, that is, toward the front side of the accessory. Force. Therefore, the second folded portion expands from the outer plate together with the first folded portion. When the finger is released from the push button, the interference protrusion is again moved to the first position by the urging force of the elastic urging means.
Immerse yourself in the folding part of.

As described above, unless the push button is pressed, the interference protrusion is retracted into the first folding portion by the urging force of the elastic urging means, so that the interference protrusion can be hidden from the visual field of the wearer. Therefore, the appearance of the accessory is improved.

When the first folding portion and the second folding portion are folded on the outer plate, the interference protrusion does not come into contact with the second folding portion, so that the interference protrusion is prevented from being worn or bent or bent. You can Therefore, the interlocking expansion mechanism can function well over a long period of time.

Further, according to the double-door type clasp structure of the present invention according to claim 9, in the double-folding clasp structure of the double door structure according to any one of the first to fourth aspects, the locking mechanism has the first structure. A push locking mechanism attached to the folding portion, wherein the push locking mechanism includes an insertion space provided in the front plate along a lateral direction of the accessory, and a push locking mechanism inside the insertion space along a lateral direction of the jewelry. A push button slidably arranged, a button side engaging portion provided on the push button, and a button side elastic biasing means for biasing the push button outward along the lateral direction of the accessory. An outer plate side engaging portion provided on the outer plate, wherein the button side elastic urging means urges the button side engaging portion toward the outer plate side engaging portion, Side engaging portion and the outer plate side engaging portion are engaged, When the push button is pressed against the urging force of the button side elastic urging means, the button side engaging portion is separated from the outer plate side engaging portion and the engagement is released. The first folding portion includes the interference protrusion movably provided along a longitudinal direction of the accessory, and an elastic biasing unit that biases the interference protrusion in a direction of being retracted into the first folding portion, Cam means for moving the interference projection, which is depressed into the first folding portion, against the bias of the elastic biasing means, and projecting the push button from the first folding portion by finger pressure. Due to
Not only can the same effects as those of the above-described invention of the first aspect be exerted, but the interference projections are retracted into the first folding portion by the urging force of the elastic urging means unless the push button in the push locking mechanism is acupressured. It First folding part and second
The folds of fold up to the outer plate, and the push fold mechanism engages the first fold with the outer plate. The second folding portion may be pressed against the outer plate by the front plate connected to the first folding portion, or the second folding portion may be pressed between the second folding portion and the outer plate.
The locking mechanism may be provided.

When the push button is pressed at the position where the first folding part and the second folding part are folded on the outer plate, the engagement between the first folding part and the outer plate is released, and at the same time, the cam is released. By the means, the interference protrusion that is recessed in the first folding portion moves along the longitudinal direction of the accessory against the biasing force of the elastic biasing means and projects from the first folding portion. Then
When the first folding part is expanded from the outer plate, the protruding interference protrusion interferes with the second folding part, and is attached in the direction of expanding the second folding part from the outer plate, that is, toward the front side of the accessory. Energize. Therefore, the second folded portion expands from the outer plate together with the first folded portion. When the finger is released from the push button, the interference protrusion is retracted into the first folding portion again by the urging force of the elastic urging means.

As described above, the finger pressure of the push button releases the engagement between the first fold and the outer plate, and at the same time, the interference boss and the second fold that are recessed in the first fold are directed toward the second fold. The projection is made to function and the interlocking expansion mechanism functions.

As long as the push button is not pressed, the interference protrusion is retracted into the first folding portion by the urging force of the elastic urging means, so that the interference protrusion can be hidden from the visual field of the wearer. Therefore, the appearance of the accessory is improved.

Furthermore, when the first folding portion and the second folding portion are folded on the outer plate, the interference protrusion does not come into contact with the second folding portion, so that the interference protrusion is prevented from being worn or bent or bent. be able to. Therefore, the interlocking expansion mechanism can function well over a long period of time.

Further, according to the double-door type clasp structure of the present invention according to claim 10, in the double-fold type clasp structure of the double door structure according to claim 9, the interference protrusion is provided in a part of the insertion space along the longitudinal direction of the accessory. By being provided so as to be movable and urged toward the second folding portion by the elastic urging means, the same action as the action of the invention of claim 9 (claim 1) can be obtained. Alternatively, a space required for the push locking mechanism, and a space along the longitudinal direction of the accessory necessary for the interference projection insertion portion for inserting and disposing the interference projection and the elastic biasing means for biasing the interference projection. Since they can be overlapped on a plane, the space required for both the push locking mechanism and the interference projection insertion portion can be significantly reduced. Therefore, the double-door type clasp structure can be made compact.

Further, one push button and the other push button are inserted in the insertion space so as to face each other along the lateral direction of the accessory, and one and the other push buttons are engaged with the outer plate side engaging portions. In the case of the dual push locking mechanism, if the interference protrusion and the elastic biasing means are arranged between the one push button and the other push button, the required space can be significantly reduced. At this time, the elastic biasing means may be arranged between the interference projection and the push button so that the elastic biasing means can be bent between the interference projection and the push button.

Further, according to the double-door type clasp structure of the present invention according to the eleventh aspect, in the double-door type clasp structure of the eighth or ninth aspect, the cam means is a cam formed on the push button. Since the inclined surface and the copying projection formed on the interference projection and slidingly contacting the cam inclined surface are provided, the same operation as the operation of the invention of claim 8 or claim 9 (claim 1) can be achieved. Alternatively, the cam means can be constructed with a simple structure.

Further, according to the double-door type clasp structure according to the invention of claim 12, in the double-folding clasp structure with open door structure according to claim 8 or 9, the cam means is connected to the inner end portion of one push button. Of the contact surface along the longitudinal direction of the accessory, one inclined cam portion having a cam inclined surface located on one end side of the accessory and inclined toward the other end side of the accessory, and the longitudinal length of the accessory on the inner end of the other push button The contact surface along the direction has a cam slope which is located on one end side of the accessory and inclines toward the other end of the accessory, and the base of the cam slope is larger than the base of the one inclined cam part. Further, a piece main body having the other inclined cam portion whose height is lower than that of the one inclined cam portion and whose top end surface is larger than that of the one inclined cam portion, and the interference protrusion on the other end side of the accessory. , Opposite to the interference protrusion In the accessory piece of the attachment / detachment piece having the clasp side engaging portion, one and the other inclined inclined surfaces provided at both ends in the lateral direction of the accessory, and one and the other push buttons are respectively inserted into the push button insertion portions. Inserting the attachment / detachment piece into the attachment / detachment piece insertion portion, urging the attachment / detachment piece toward one end side of the accessory by elastic urging means, and inserting the attachment / detachment piece between one and the other push buttons, 9. The method according to claim 8, wherein one of the contour inclined surfaces is brought into contact with the cam inclined surface of the one inclined cam portion, and the top end surface of the other inclined cam portion is brought into contact with the side surface of the removable piece.
Alternatively, not only the same operation as that of the invention of claim 9 (claim 1) can be exerted, but also by pushing one and the other push button, one push button moves inward, and the inclined cam portion of this push button. Of the cam slides on the sloping surface to push the detachable piece against the elastic biasing means by 1/2 of the stroke amount of the detachable piece. Therefore, the top end surface of the other inclined cam portion is displaced from the side surface of the attachment / detachment piece, and the other copying inclined surface is located on the extension of the cam inclined surface of the other inclined cam portion.

When the other push button is pushed, the cam slope of the inclined cam portion slides on the other copying slope, and the detachable piece is moved to the remaining half of the stroke amount of the detachable piece. Pushes against the elastic biasing means. Therefore, the interference protrusion of the detachable piece projects and interferes with the other folding portion side.

As described above, the engagement between the first folding portion and the outer plate cannot be released unless both the one push button and the other push button are pressed. Therefore, even if an unintended external force is applied to one of the push buttons and the other, the first
Since the engagement between the folded portion and the outer plate is not released, the double door clasp does not open accidentally.

Further, unless the push buttons on one side and the other side are pressed together, the interference protrusions that are recessed in the first folding portion do not completely project toward the second folding portion, so that the interference protrusions can be seen from the view of the wearer. Can be hidden. Therefore, the appearance of the accessory is improved.

Further, according to the double-door type clasp structure of the present invention according to the thirteenth aspect, in the double-door type clasp structure of the eighth aspect or claim 9, the elastic biasing means for biasing the interference protrusion is used. By urging the push button outward along the lateral direction of the accessory, not only the same effect as the operation of the invention of claim 8 or claim 9 (claim 1) can be obtained. Since the elastic biasing means for biasing the interference projection also serves as the button side elastic biasing means for biasing the push button outward, the number of parts can be reduced. Therefore, the double-door type clasp structure can be manufactured at low cost.

Further, according to the double-door type clasp structure of the present invention according to the fourteenth aspect, in the double-door type clasp structure of the first aspect, the locking mechanism is provided with the first engagement member. When used as a stop mechanism, a second locking mechanism that engages with the second folding portion and the outer plate in a disengageable manner is provided, and the second locking mechanism has the other middle plate inside thereof. It has a storage part that accommodates the outer surfaces of the outer plate and the middle plate in the same plane, and at least one pivot protrusion is provided on either the outer surface of the other middle plate or the inner surface of the storage part. The pivot protrusion engaging portion with which the pivot protrusion engages is provided on either the outer surface of the other middle plate facing the pivot protrusion or the inner surface of the storage portion. The same effect as that of the invention of claim 1 can be achieved. In addition, the outer plate and the middle plate can be securely locked and held, and the second folding part and the outer plate are engaged with each other by the urging force of the interference protrusions in the first folding part. Is easily released.

[Brief description of the drawings]

FIG. 1 is an embodiment 1 of a double-door type clasp structure according to the present invention.
It is a perspective view of.

FIG. 2 is a perspective view of a first folding portion of the double-door sound opening type clasp structure.

FIG. 3 is an explanatory diagram of an initial folded state of the sound opening type clasp structure.

FIG. 4 is an explanatory diagram of a folded state of the same-tone open type clasp structure.

FIG. 5 is an operation explanatory view of a locking mechanism.

FIG. 6 is an explanatory diagram of an open state of the sound opening type clasp structure.

FIG. 7 is a second embodiment of the double-door type clasp structure according to the present invention.
FIG. 4 is a perspective view of a disassembled state.

FIG. 8 is a perspective view showing an exploded state of an interference projection mechanism portion of a front cover of the audible sound opening type clasp structure.

FIG. 9 is a plan view of the interference protrusion mechanism portion with a part thereof omitted.

FIG. 10 is a perspective view of a first folding portion in the sound opening type clasp structure.

FIG. 11 is a vertical sectional view of the first folding portion.

12 (1) to (3) are explanatory views of the closing operation of the homo-sound opening type clasp structure.

FIG. 13 is an explanatory diagram of a releasing operation of the sound opening type clasp structure.

FIG. 14 is a perspective view showing another disassembled interference projection mechanism portion of the front cover of the audible sound opening type clasp structure.

FIG. 15 is a plan view of the interference protrusion mechanism part with a part omitted.

FIG. 16 is a vertical cross-sectional view of the interference protrusion mechanism portion.

FIG. 17 is a perspective view of a third embodiment of the double-door type clasp structure according to the present invention in an exploded state.

FIG. 18 (1) is a partially omitted plan view of the same double-door open type clasp structure before push. (2) is a partially omitted cross-sectional view of the same double-door open type clasp structure before push. (3) is a partially omitted plan view after the push in the double-door open type clasp structure.

FIG. 19 (1) is a perspective view seen from the front side of the front plate.
(2) is a perspective view seen from the back side of the front plate.

FIG. 20 is a perspective view of a cover.

FIG. 21 is a perspective view of the other push button.

FIG. 22 is a perspective view of one push button.

FIG. 23 (1) is a perspective view of the detachable piece as seen from the front. (2) is a perspective view of the detachable piece as viewed from the rear.

FIG. 24 is a perspective view of an outer plate.

FIG. 25 (1) is a perspective view seen from the front side of one of the intermediate plates. (2) is a perspective view seen from the back side of the intermediate plate.

FIG. 26 is a perspective view of another configuration of the lock mechanism in an exploded state.

[Fig. 27] Fig. 27 is a perspective view of a disassembled state of embodiment 4 of the double-door type clasp structure according to the present invention.

FIG. 28 (1) is a partially omitted plan view before pushing in the double-door open type clasp structure. (2) is a partially omitted cross-sectional view of the same double-door open type clasp structure before push. (3) is a partially omitted plan view after the push in the double-door open type clasp structure. (4) is a partially omitted cross-sectional view after the push in the double-door open type clasp structure.

FIG. 29 is a cross-sectional view of a double-door type clasp structure with another lock mechanism.

FIG. 30 is a plan view in which one middle plate in the double-door double-door type clasp structure is partially omitted.

FIG. 31 is a perspective view of a fifth embodiment of the double-door type clasp structure according to the present invention in an exploded state.

FIG. 32 is a perspective view showing an exploded state of embodiment 6 of the double-door type clasp structure according to the present invention.

FIG. 33 (1) is a plan view of the same double-door open type clasp structure with some parts omitted before push. (2) is a partially omitted cross-sectional view of the same double-door open type clasp structure when one push button is pushed in. (3) is a plan view in which the other push button in the same-sound double-door type clasp structure is pushed in and a part thereof is omitted.

FIG. 34 is a perspective view of one and the other push buttons in the same-sound-opening type clasp structure.

FIG. 35 is a perspective view of the detachable piece of the double-door open type clasp structure seen from the front side.

[Fig. 36] Fig. 36 is a perspective view of the detachable piece in the double-door open type clasp structure as seen from the back side.

FIG. 37 is a perspective view of a center-folding mechanism having a double-door double-opening type clasp structure according to the related art.

FIG. 38 is a structural explanatory view of a clasp mechanism of the double-door double clasp structure.

[Explanation of symbols]

 1 One watch band (accessory) 2 The other watch band (accessory) 3 Push locking mechanism 22, 23 Push button 27 Engagement part (button side engagement part) 35 Engagement pin (outer plate engagement part) 36 Outside Plate 100 First Folding Part 101 Second Folding Part 102 Interference Protrusion 103 Outer Plate 104 One Middle Plate 105 The Other Middle Plate V1 Locking Mechanism

Claims (14)

[Claims] 1. A first folding portion in which one end portion of one middle plate is connected to one end portion of the accessory and a second folding portion in which one end portion of the other middle plate is connected to the other end portion of the accessory. In the double-door clasp structure with the other end of the one middle plate connected to one end of the outer plate and the other end of the other middle plate connected to the other end of the outer plate, A first folding part includes an interfering protrusion projecting toward the second folding part, and the first folding part includes a locking mechanism for releasably engaging the first folding part with the outer plate. From the position where the folding portion and the second folding portion are folded on the outer plate, the interference is interlocked with the operation of releasing the locking mechanism and expanding the first folding portion from the outer plate. A double-door double-open type having an interlocking expansion mechanism for expanding the projection from the outer plate by interfering the projection with the second folding portion. Tome structure. 2. A front cover is connected between one end of the accessory and one end of the one middle plate in the first folding portion, and the interference protrusion is arranged on the back side of the front cover. The double-door type clasp structure described in 1. 3. The structure according to claim 1, wherein the interference protrusion is configured to interfere with a connecting end portion in which one end portion of the other middle plate is connected to the other end portion of the accessory in the second folding portion. The double-door type Nakadome structure described in 2. 4. The connecting end is provided with a connecting piece connected to the other end of the accessory in the second folding part and one end of the other middle plate, and the connecting piece is provided with the connecting piece. 4. The double-door double clasp structure according to claim 3, wherein an interference protrusion protruding toward the folded portion 1 is formed, and the back surface of the interference protrusion interferes with the interference protrusion. 5. The method according to claim 1, wherein the interference protrusion is provided so as to be movable along a longitudinal direction of the accessory, and is elastically biased toward the second folding portion. The double-door type clasp structure of crab. 6. An interference protrusion accommodating portion is provided on the back side of the front cover along the longitudinal direction of the accessory, and the interference protrusion and the interference protrusion are biased toward the second folding portion in the interference protrusion accommodating portion. The elastic urging means is inserted and arranged.
A double-door type clasp structure according to claim 5. 7. The locking mechanism is a push locking mechanism attached to the front plate, and the push locking mechanism includes an insertion space provided on the front plate along the lateral direction of the accessory,
A push button slidably disposed in the insertion space along the lateral direction of the accessory, a button side engaging portion provided on the push button, and the push button outward along the lateral direction of the accessory. A button-side elastic urging means for urging the button-side elastic member, and an outer-plate-side engaging portion provided on the outer plate. When the push button is pressed against the urging of the button side elastic urging means, the button side engaging part and the outer plate side engaging part are engaged with each other by being urged toward the joint part. The button-side engaging portion is separated from the outer-plate-side engaging portion to be disengaged, and the interference protrusion is provided in a part of the insertion space so as to be movable along the longitudinal direction of the accessory. Urging the elastic urging means toward the second folding portion Double doors type clasp structure according to any one of claims 1 to 6. 8. The interference protrusion provided on the first folding portion so as to be movable along the longitudinal direction of the accessory, and the elastic biasing for biasing the interference protrusion in the direction of being retracted into the first folding portion. Means and a push button arranged in the first folding portion, and the interference projection that is recessed in the first folding portion is prevented from being biased by the elastic biasing means by finger pressure on the push button. 5. The double door clasp structure according to claim 1, further comprising cam means that is moved so as to project from the first folding portion. 9. The locking mechanism is a push locking mechanism attached to the first folding portion, and the push locking mechanism is an insertion space provided on the front plate along the lateral direction of the accessory. A push button slidably arranged in the insertion space along the lateral direction of the accessory, a button-side engaging portion provided on the push button, and the push button outside the lateral direction of the accessory. A button-side elastic means for urging the button-side elastic means and an outer-plate-side engaging portion provided on the outer plate. When the push button is pressed against the bias of the button-side elastic means, the button-side engaging portion is engaged with the outer-plate-side engaging portion, and the button side is pressed. The engagement part is separated from the outer plate side engagement part and the engagement is released. The interference protrusion provided on the first folding portion so as to be movable along the longitudinal direction of the accessory, and the elastic biasing force for biasing the interference protrusion in the first folding portion. Means for moving the interference protrusion, which is depressed into the first folding portion, against the bias of the elastic biasing means by the finger pressure of the push button to project from the first folding portion. The double-door type clasp structure according to any one of claims 1 to 4, further comprising cam means for causing the structure. 10. The interference projection is provided in a part of the insertion space so as to be movable along the longitudinal direction of the accessory, and is biased toward the second folding portion by the elastic biasing means. The double-door type Nakadome structure described. 11. The double-door double-open type according to claim 8 or 9, wherein the cam means includes a cam slope formed on the push button and a copying protrusion formed on the interference protrusion and slidingly contacting the cam slope. Nakadome structure. 12. The cam means has a cam sloped surface located at one end side of the accessory of the contact surface along the longitudinal direction of the accessory at the inner end of one push button and inclined toward the other end side of the accessory. One inclined cam portion, and a cam inclined surface located on one end side of the accessory of the contact surface along the longitudinal direction of the accessory of the inner end of the other push button and inclined to the other end side of the accessory, and The dimension of the base portion in the longitudinal direction of the accessory is larger than that of the one inclined cam portion, the height thereof is lower than that of the one inclined cam portion, and the top end surface of the base portion is larger than the top end surface of the one inclined cam portion. One of the detachable piece having the slanting cam portion and the main body of the piece having the interference projection on the other end side of the accessory on the side opposite to the interference projection in the transverse direction of the accessory, and It consists of the other contoured slope and one The other push button is inserted into each push button insertion portion, the attachment / detachment piece is inserted into the attachment / detachment piece insertion portion, and the attachment / detachment piece is biased toward one end side of the accessory by elastic biasing means. The attaching / detaching piece is inserted between the one and the other push buttons, the one sloping inclined surface is brought into contact with the cam inclined surface of the one inclined cam portion, and the top end surface of the other inclined cam portion is a side surface of the attaching / detaching piece. Claim 8 or Claim 9 which was made to contact with
The double-door type Nakadome structure described. 13. The double-door type open door mold according to claim 8 or 9, wherein the elastic biasing means for biasing the interference protrusion biases the push button outward along the lateral direction of the accessory. Tome structure. 14. When the locking mechanism is a first locking mechanism, a second locking mechanism that engages with the second folding portion and the outer plate in a disengageable manner is provided, and the second locking mechanism is provided. The locking mechanism has a storage part in which the other middle plate is housed and the outer surfaces of the outer plate and the middle plate are flush with each other, and the outer surface of the other middle plate or the storage part. On one of the inner surfaces of
At least one pivot protrusion is provided, and a pivot protrusion engaging portion with which the pivot protrusion engages is provided on either the outer surface of the other middle plate facing the pivot protrusion or the inner surface of the storage portion. The structured double door clasp structure according to any one of claims 1 to 13.