JP2000344256A - Cap structure for airtight wide mouth container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To combinedly provide an inner cap with the free stop function by forming a cap into a double cap structure formed of the inner cap and an outer cap, adding the free stop function to the outer cap and holding the inner cap by the free stop function while providing the inner cap with rocking properties and securing the good fitting properties with an opening communicated with an annular protrusion and a wide mouth container. SOLUTION: A cap main body 13 of airtight structure is set removably on a mouth 11 of a wide mouth container 10a, and an opening 15 communicating with the mouth 11 is formed on the cap main body. An inner cap 20 with an annular protrusion 22 formed thereon and closing the opening to be opened and closed freely and sealing the same and an outer cap 19 disposed outside the inner cap and opening and closing the cap main body are provided. The outer cap is hinged on the cap main body by a hinge 24 utilizing the free stop function, and the inner cap is hinged to be rocked freely thereon. The inner cap is hinged to be rocked freely on the outer cap by an engaging means 39. A hook mechanism 32 formed of an engaging section 33 engaged to be rocked freely with the cap main body and a hook piece 36 releasing the engagement by the action of the operation force and rotated up and down is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap structure for an airtight wide-mouthed container capable of opening and closing a mouth of the wide-mouthed container in an airtight manner.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 10-99125 and Japanese Patent Application Laid-Open No. 10-99126 (in both cases, A45) have been used for storing cosmetics, especially cosmetics having volatility.
D 34/00), an airtight wide-mouthed container is employed. A cap that can be opened and closed with a lid is screwed into the mouth of the wide-mouthed container. By opening the lid, the cosmetics in the container can be easily taken out from the mouth. ing. The lid is configured to be opened and closed by a hinge and held in a closed state by a hook, and the hook is released by one touch.

[0003] That is, simply closing the mouth of the wide-mouthed container can be achieved by screwing the cap. However, with the screw having this screwed-in structure, it is necessary to rotate the cap with force for its attachment and detachment. It becomes difficult to open and close the mouth. In particular, at the time of makeup, it is desirable to be able to open the cap with one hand, since a makeup tool such as a puff is held in one hand, and such a screwing structure makes it impossible.

On the other hand, in the wide-mouthed container disclosed in the above-mentioned publication, the cap can be opened and closed by the lid, and the lid can be easily opened by operating the hook with one hand, thereby increasing the convenience. It is significantly improved. At this time, in order to maintain high airtightness of the lid, an annular projection is formed on the inner surface of the lid, and when the lid is closed, the annular projection sandwiches the packing material of the cap and forms the opening. Is press-fitted into the inner periphery of the opening communicating with the opening.

[0005]

However, in such a conventional airtight wide-mouthed container, the lid for opening and closing the cap has a single structure, and this single lid is hinged at one point. Is rotated around the center. Therefore, if the fitting tolerance between the annular projection and the inner periphery of the opening of the cap is reduced in order to enhance the sealing performance of the lid, the annular projection and the periphery of the opening are completely closed when the lid is opened and closed. Because a twist occurs between both before and after fitting,
This becomes a resistance, and the opening / closing force of the lid increases. Further, if there is an error in forming the annular protrusion or an error in assembling the hinge portion, the annular protrusion may be biased with respect to the opening, and the sealing performance may be impaired.

Therefore, if the hinge is provided with a play corresponding to the twist, the formation error and the assembly error so that the cover can be swung, the cover can be closed when the cover is closed. It is considered that since the annular projection is smoothly fitted into the opening with the movement, the resistance due to the twisting can be eliminated, and a decrease in the seal between the annular projection and the opening can be prevented.

[0007] However, when the hinge portion of the lid is loose, the free stop function of the lid is not effective, so that the lid cannot be stopped at an arbitrary opening position and the makeup cannot be stopped. It is necessary to keep the lid fully open at the time of use of the material, or to hold it by hand in the middle of the open state. In this case, when fully opened, the lid spreads out of the way, and when held by hand, one hand is closed, which reduces the convenience when using the airtight wide-mouthed container. there were.

Accordingly, the present invention has been made in view of such a conventional problem, and has a lid having a double lid structure of an inner lid and an outer lid. By adding a free stop function to the outer lid and holding the inner lid with this while ensuring good fitting with the opening of the cap body leading to the container, making the inner lid also have a free stop function It is an object of the present invention to provide a cap structure of an airtight wide-mouthed container that can perform the sealing.

[0009]

In order to achieve the above object, a cap structure for an airtight wide-mouthed container according to the present invention, which seals the mouth of the wide-mouthed container so that it can be opened and closed, is attached to the mouth with an airtight structure. And a cap body having an opening communicating with the mouth, an inner lid formed with an annular projection for sealing the opening and opening and closing air-tightly, and an outer side of the inner lid. An outer lid that is arranged at the opening and closing the cap body, a hinge that hinges the outer lid to the cap body with a free stop function, and a hinge that swingably hinges the inner lid to the cap body, an outer lid and an inner lid Interlocking means for locking the inner lid to the outer lid so as to swing freely, and opening and closing the outer lid and the inner lid integrally; and engaging and disengaging the outer lid or the inner lid with the cap body. The outer lid and inner lid are freely engaged A hook mechanism for holding the hook mechanism, the hook mechanism, an engaging portion provided to be detachable between the cap body and either the outer lid or the inner lid, and supported vertically rotatably by the cap body, The present invention is characterized in that an operating portion for applying an operating force and a hook piece having a push-up portion for lifting either the outer lid or the inner lid by the operating force are provided.

According to this configuration, the mouth of the wide-mouthed container is hermetically closed by closing the opening of the cap main body attached to the air-tight container with the lid. It has a double lid structure with the outer lid. When opening the mouth of the wide-mouthed container, the outer lid and the inner lid are opened, and when the mouth is closed, the inner lid and the outer lid are closed. At this time, the hook mechanism is engaged. As a result, the outer lid and the inner lid are kept closed.

The outer lid and the inner lid are hinged to the cap body via hinges, and the inner lid is swingable at the hinged portion. For this reason, when the inner lid is closed and the annular projection formed thereon is fitted into the opening of the cap body, the annular projection is twisted between the opening and the opening due to the swinging of the inner lid. Fits smoothly and tightly without Therefore, the inner lid can close the opening with a small closing force to maintain airtightness.

The inner lid is swingably hinged as described above. The inner lid is locked to the outer lid via locking means, and the outer lid and the inner lid are integrally opened and closed. You. For this reason, when opening the mouth of the wide-mouthed container, by disengaging the hook mechanism, the inner lid can be opened together with the outer lid, and the opening of the cap body can be opened by a single opening operation of the lid. Since it can be opened, its operability is improved. At this time, the inner lid is swingably hinged, but since the outer lid is hinged with a free stop function, this free stop function is also provided in the inner lid. Therefore, since the inner lid can be stopped at an arbitrary open position together with the outer lid, the convenience when using the wide-mouthed container is improved.

The closed state of the outer lid and the inner lid is maintained by the engagement of the engaging portion of the hook mechanism. When the engaged state is released by the hook piece, the outer lid and the inner lid are released. Can be opened. In other words, the hook piece is a rotary type that is supported by the cap body so that it can rotate up and down, and by applying an operating force to the operating section, the push-up section pushes either the outer lid or the inner lid. lift. Then, since the outer lid and the inner lid are lifted together via the locking means, the engaging portion is forcibly released and the outer lid and the inner lid can be easily opened by hand.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 6 show an embodiment of a cap structure of an airtight wide-mouthed container according to the present invention. FIG. 1 is an exploded perspective view showing a part of the cap structure in a cutaway manner. FIG. Plan view of the cap structure,
3 is a front view of the cap structure, FIG. 4 is a longitudinal sectional view of the cap structure with the outer lid and the inner lid closed, FIG. 5 is a longitudinal sectional view of the cap structure with the outer lid and the inner lid opened, and FIG. 6 is a hook mechanism. (A) is an enlarged cross-sectional view of a main part of a hook piece portion, (b) is an enlarged cross-sectional view of a main part of an engagement portion, and FIG. 7 shows a disengaged state of a hook mechanism. () Is an enlarged sectional view of a main part of a hook piece portion, and (b) is an enlarged sectional view of a main part of an engaging portion.

The basic structure of the cap structure of the airtight wide-mouthed container of the present invention is to open and close the mouth portion 11 of the wide-mouthed container 10a, and is detachably attached to the mouth portion 11 with an airtight structure. A cap body 13 having an opening 15 communicating with the opening 11;
An annular projection 22 for closing and opening airtightly and sealing hermetically
, An outer cover 19 disposed outside the inner cover 20 to open and close the cap body 13,
Is hinged to the cap body 13 with a free-stop function, and the hinge 24 for swingably hinged the inner lid 20 to the cap body 13 is provided between the outer lid 19 and the inner lid 20. Locking means 42 for swingably locking the outer lid 19 to open and close the outer lid 19 and the inner lid 20 integrally, and the outer lid 19 or the inner lid 20 being detachably engaged with the cap body 13. And these outer lid 19 and inner lid 2
And a hook mechanism 32 for holding a closed state of zero. At this time, the hook mechanism 32 is
An engaging portion 33 provided between the outer cover 19 and either one of the outer lid 19 and the inner lid 20 so as to be detachable, and an operating portion 3 supported by the cap body 13 so as to be vertically rotatable and applying an operating force.
4 and a hook piece 36 having a push-up portion 35 for lifting either the outer lid 19 or the inner lid 20 by operating force.

That is, the wide-mouthed container 10a of the present embodiment is formed as a cylindrical glass bottle as shown in FIGS. 1 to 4, in which volatile cosmetics are stored. Wide mouth container 1
At the upper end of Oa, a large-diameter mouth portion 11 rises in a cylindrical shape, and a male screw portion 12 is formed on the outer periphery thereof. A cap body 13 screwed to the screw portion 12 is attached to the mouth portion 11.

The cap body 13 is formed in an annular shape having substantially the same diameter as that of the wide-mouthed container 10a, and the inner thread portion 1
2, a female screw 14 is formed, and an opening 15 having substantially the same diameter as the inner diameter of the mouth 11 rises on the upper surface of the central portion. At this time, the lower end of the opening 15 extends downward, and the extended portion 15 a is closely fitted to the inner periphery of the opening 11. In addition, an upright wall 16 is formed in an annular shape at an upper peripheral portion of the cap body 13. And the cap body 13
Is screwed to the outer periphery of the opening 11, the ring-shaped packing 1 is located between the upper end of the opening 11 and the lower peripheral edge of the opening 15.
7 is sandwiched and fixed in a press-contact state, and the both sides are sealed.
An annular packing 18 is fitted around the opening 15. A tapered portion 18a which is a substantially airtight holding portion is formed on the outer periphery of the upper end portion of the packing 18.

An outer lid 19 and an inner lid 20 are attached to one side (rear end) of the cap body 13 via a hinge 24, which will be described later, so as to be freely opened and closed. The outer lid 19 is formed along the outer shape of the cap main body 13, and its peripheral edge portion has a hanging wall 21 facing the upright wall 16 of the cap main body 13.
The hanging wall 21 is abutted against the upright wall 16 without any gap when the outer lid 19 is closed as shown in FIG. The inner lid 20 is formed in a shape along the inside of the hanging wall 21 of the outer lid 19, is arranged inside the hanging wall 21, and the outer diameter of the inner lid 20 is slightly larger than the inner diameter of the hanging wall 21. When the inner lid 20 is formed to be small and is disposed in the hanging wall 21, the inner lid 20 can swing freely in all directions with play. Here, "swing" means a state in which movement relative to the counterpart member is allowed, and "swing" described in this specification has the same meaning in all cases.

At the center of the inner lid 20, there is formed a circular recess 20a which is recessed downward with substantially the same diameter as the above-mentioned mouth portion 11. On the back surface of the inner lid 20, an annular ring is formed concentrically with the circular recess 20a. The protrusion 22 is integrally provided. The annular projection 22 is projected so as to reach a position lower than the height of the top of the opening 15 and has an inner diameter slightly smaller than the outer diameter of the packing 18 as shown in FIG. When the lid 20 is closed, the tip of the annular projection 22 is pressed against the tapered portion 18a. An annular small projection 23 is provided inside the annular projection 22 from the rear surface of the inner lid 20 so as to be concentric with the annular projection 22.
0 is pressed against the upper end of the packing 18 in the closed state.

The rear ends of the outer lid 19 and the inner lid 20 are hinged 2
4 is hinged to the cap body 13 so that it can be opened and closed freely.
The hinge 24 has a first protruding piece 26 and a second protruding part hanging from the rear ends of the outer lid 19 and the inner lid 20 in a rear recess 25 in which a rear central portion of the upright wall 16 of the cap body 13 is cut off to a predetermined width. Piece 27 is fitted together, and hinge pin 28 is driven into first and second projecting pieces 26 and 27 from upstanding walls 16 on both sides of rear recess 25.

The first projecting piece 26 of the outer lid 19 is
5 is provided on the left and right sides with a notch width of 5, while the second protruding piece 27 of the inner lid 20 is formed to be slightly narrower than the width between the first protruding pieces 26. In a state where the second protruding piece 27 is fitted to the
6 and 27 are fitted into the rear recess 25. Here, the pin holes 29 and 30 of the hinge pin 28 formed respectively on the upright wall 16 and the first projecting piece 26 are configured so that the hinge pin 28 is press-fitted to obtain a predetermined rotation resistance. The pin hole 31 formed in the second projecting piece 27 is
The hinge pin 28 is formed to have a diameter larger than that of the hinge pin 28 so that a predetermined amount of play is obtained at zero. Therefore, the outer lid 19 is provided with a free stop function due to rotation resistance generated between the outer lid 19 and the hinge 24, and is stopped at an arbitrary open position while the outer lid 19 is stopped.
Is loosely fitted with the hinge 24 so that the cap body 13
And the outer lid 19 is swingable.

The outer lid 19 and the inner lid 20 are connected to the hook mechanism 3
2 engages with the cap body 13 in a detachable manner, and the closed state of the outer lid 19 and the inner lid 20 is maintained. The hook mechanism 32 is supported by the cap body 13 so as to be freely rotatable up and down, and an engaging portion 33 provided to be detachable between the cap body 13 and either the outer lid 19 or the inner lid 20. An operation part 34 to be actuated and a hook piece 36 having a push-up part 35 for lifting either the outer lid 19 or the inner lid 20 by an operation force are formed.

As shown in FIG. 2, the engaging portion 33 is provided at a position symmetrically distributed to the left and right, and a first engaging portion 33a projecting from the inner periphery of the upright wall 16 and an outer periphery of the annular projecting portion 22. And a second engaging portion 33b projecting from the second engaging portion 33b. By closing the outer lid 19 and the inner lid 20, the first and second engagement portions 33 a and 33 b cause the second engagement portion 33 b to be engaged with the first engagement portion while partially deforming the annular protrusion 22. Joint 33a
And are engaged with each other (see FIG. 6B).

The hook piece 36 is disposed in a front concave portion 37 in which a front central portion of the upright wall 16 of the cap body 13 is cut out to a predetermined width. The hook piece 36 is formed in a rectangular shape in cross section, and engagement holes 38 formed on both sides of the bent portion are fitted into support projections 39 protruding from both sides of the front concave portion 37, so that this fitting portion is formed. Up and down rotation is free as the center. One end of the hook piece 36 is the operation unit 3
4 and is disposed below, and the other end is a push-up portion 35 and is disposed rearward along the lower surface of the hanging wall 21 of the outer lid 19 (see FIG. 6A). Accordingly, the hook piece 36 rotates counterclockwise in the drawing by applying an operating force F in the pushing direction (rearward direction) to the operating portion 34, and rotates the push-up portion 35 upward. Outer lid 1
The front end of the 9 hanging wall 21 is forcibly lifted (see FIG. 7A).

A recess 40 is formed inside the front end of the hanging wall 21 of the outer lid 19, and a projection 41 fitted into the recess 40 is formed at the front end of the inner lid 20. The locking means 42 is constituted by the and the protruding portion 41. The locking means 42 locks the outer lid 19 and the inner lid 20 in the opening / closing direction to open and close the two integrally. The width is allowed to be larger than the protrusion amount and the width of the protrusion 41. Further, a projection 43 is formed at the center of the upper surface of the circular concave portion 20a of the inner lid 20 so as to be in contact with the back surface of the outer lid 19, and the closing force of the outer lid 19 is applied to the center of the inner lid 20 via the projection 43. It works on the part.

With the above structure, in the cap structure of the airtight wide-mouthed container according to the present embodiment, the outer lid 19 and the inner lid 20 hinged to the cap body 13 via the hinge 24 so as to be freely opened and closed have a double lid structure. In the closed state shown in FIGS. 4 and 6, the first and second engagement portions 33a,
33b are engaged with each other. At this time, since the outer lid 19 and the inner lid 20 are integrally locked in the opening and closing direction via the locking means 42, the first and second engagement portions 33a,
The outer lid 19 and the inner lid 20 are kept closed in the engaged state of 33b. In this closed state, the hook piece 36
The push-up portion 35 is pressed by the outer lid 19, and the operation portion 34 projects from the front concave portion 37 as shown in FIG.

On the other hand, when the inner lid 20 is closed,
The annular projection 22 is pressed against the tapered portion 18a of the packing 18 to keep the inside of the opening 15 airtight. Thereby, even if the cosmetics stored in the wide-mouthed container 10a are volatile, the volatilization is prevented and the deterioration of the quality is prevented. The airtightness inside the opening 15 is maintained by the small annular projection 2.
3 is pressed against the upper end of the packing 18 so that the annular protrusion 2 is formed.
2 is press-contacted to the tapered portion 18a to form a double seal structure, and its airtightness is remarkably improved.

When the cosmetic is used, the engaging portion 33 is disengaged by the hook piece 32 to open the outer lid 19 and the inner lid 20. First, the front recess 37 is used.
By pressing the operating portion 34 protruding from the upper portion to apply the operating force F, as shown in FIGS.
5 rotates upward to lift the front end of the outer lid 19. Then, since the outer lid 19 and the inner lid 20 are lifted integrally via the locking means 42, the first and second engaging portions 33a and 33b are forcibly disengaged. Thereby, the outer lid 19 and the inner lid 20 can be opened by hand,
In the initial stage when the inner lid 20 is opened, first, the annular protrusion 22
The seal 15 is released from the airtight state with the packing 18, and the opening 15 can be opened by further opening the inner lid 20, whereby the cosmetic in the wide-mouthed container 10 a can be used.

Next, when the use of the cosmetic is completed, the outer lid 1
By closing the inner cover 9 and the inner lid 20, the annular protrusion 22
The annular small projection 23 is pressed against the packing 18 to make the opening 15 airtight, and the first and second engagement portions 33a and 33b of the hook mechanism 32 are engaged and the outer lid 19 and the inner lid 20 are engaged. The closed state is maintained. Further, when the outer lid 19 and the inner lid 20 are closed, the closing force acting on the outer lid 19 directly acts on the peripheral portion of the inner lid 20, and the central portion where the circular concave portion 20 a is formed via the projection 43. Therefore, the closing force is transmitted substantially evenly to the entire inner lid 20.

By the way, the outer lid 19 and the inner lid 20 are hinged to the cap body 13 via the hinge 24. Since the inner lid 20 is swingable at the hinged portion, the inner lid 20 is pivoted. Is closed, and when the annular projection 22 formed thereon is fitted into the packing 18 of the opening 15, the inner lid 20 swings freely, so that the annular projection 22
8 can be smoothly and closely fitted with the opening 15 including the opening 8. That is, while the inner lid 20 is being closed, there is an inclination between the central axes of the annular projection 22 and the opening 15, and the inclination of the central axis causes the annular projection 22 and the packing 18 to be fitted at the time of fitting. Although the twisting occurs, the swinging function of the inner lid 20 can prevent the annular projection 22 from moving relative to the packing 18 and twisting the two. Therefore, the inner lid 20 is properly and accurately pressed into the outer periphery of the packing 18 with a small closing force to seal the opening 15 and maintain the airtightness in the wide-mouthed container 10a.

On the other hand, the inner lid 20 is locked to the outer lid 19 via the locking means 42, so that the outer lid 19 and the inner lid 20 can be opened and closed at one time at a time. By disengaging the hook mechanism 32 at the time of use, the inner lid 20 is opened along with the outer lid 19, and the cap body 13 can be opened by a single opening operation of the lid, so that the operability is improved. It will be greatly improved.

The outer lid 19 and the inner lid 20 are integrally opened and closed as described above, so that the inner lid 20 swingably hinged is supported by the outer lid 19 having a free stop function. As a result, the inner lid 20 is also provided with a free stop function as a result. Therefore, since the outer lid 19 and the inner lid 20 can be stopped at any open position,
Convenience when using cosmetics is improved. By the way, the outer lid 19 and the inner lid 20 are opened and closed integrally as described above.
Since the inner lid 20 is swingably locked to the outer lid 19, good fitting between the annular projection 22 and the opening 15 is maintained.

In the present embodiment, a male screw portion 12 is formed on the outer periphery of the mouth portion 11 of the wide-mouthed container 10a, and a female screw portion 14 is formed on the inner periphery of the cap body 13, and both are mounted by screwing. However, the present invention is not limited to this, and any structure may be used as long as the cap body 13 is detachably attached to the mouth portion 11 with airtightness. Undercut fitting that engages each other. Also, a case has been disclosed in which the outer cover 19 is lifted by the push-up portion 35 of the hook piece 36 when the engagement of the hook mechanism 32 is released.
0 may be lifted. Furthermore, the wide-mouthed container 10
Although a is a glass bottle, its material and shape are not particularly limited.

[0034]

As described above, in the cap structure of the airtight wide-mouthed container according to the present invention, the cap body which is attached to the mouth of the wide-mouthed container in an airtight structure has a double lid structure of an inner lid and an outer lid. , The outer lid is hinged with a free stop function, and the inner lid is swingable at the hinged portion. For this reason, when fitting the annular projection of the inner lid into the opening of the cap body, the inner lid swings freely, and the annular projection smoothly and tightly fits with the opening without causing kinking. Can be combined.

Further, since the inner lid is locked to the outer lid via the locking means and the two are integrally opened and closed at once,
The outer lid and the inner lid can open the cap body by a single opening operation, and the operability can be greatly improved. Furthermore, by the opening and closing operation of the outer lid and the inner lid integrally, the free stop function of the outer lid is also provided in the inner lid, and the inner lid can be stopped at an arbitrary open position together with the outer lid, Convenience when using cosmetics is improved. Furthermore, since the inner lid is rockably locked to the outer lid via the locking means, it is possible to maintain good fitting between the annular projection and the opening.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view, partially broken away, showing an embodiment of a cap structure of an airtight wide-mouthed container according to the present invention.

FIG. 2 is a plan view in which an outer lid and an inner lid of the cap structure of FIG. 1 are closed.

FIG. 3 is a front view of the cap structure of FIG. 1 in which an outer lid and an inner lid are closed.

FIG. 4 is a longitudinal sectional view of the cap structure of FIG. 1 in which an outer lid and an inner lid are closed.

5 is a longitudinal sectional view of the cap structure of FIG. 1 with an outer lid and an inner lid opened.

FIG. 6 is an explanatory view showing an engaged state of a hook mechanism of the cap structure of FIG. 1;

FIG. 7 is an explanatory view showing a disengaged state of the hook mechanism of the cap structure of FIG. 1;

[Explanation of symbols]

 10a Wide-mouthed container 11 Mouth 13 Cap body 15 Opening 19 Outer lid 20 Middle lid 24 Hinge 32 Hook mechanism 33 Engagement part 34 Operation part 35 Push-up part 36 Hook piece 42 Locking means

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ichiro Onizawa 5-29-10 Tachibana, Sumida-ku, Tokyo Inside Yoshida Kogyo Co., Ltd. (72) Yukichi Yuzuhara 5-29-10 Tachibana, Sumida-ku, Tokyo Yoshida F term in Kogyo Co., Ltd. (reference) 3E084 AA04 AA12 AB09 BA03 CA01 CB02 DA01 DB09 DB12 DB13 DB18 EA04 EB02 FA09 FB01 GA01 GA06 GB01 GB17 HA03 HB08 HC03 HD01 HD03 LA17

Claims (1)

[Claims] 1. A cap structure for an airtight wide-mouthed container which opens and closes the mouth of a wide-mouthed container in an airtight manner, wherein the cap body is attached to the mouth with an airtight structure and has an opening communicating with the mouth. An inner lid formed with an annular protrusion for closing the opening so that it can be opened and closed and hermetically sealing; an outer lid disposed outside the inner lid to open and close the cap body; Hinge with a free stop function, and a hinge that swings the inner lid to the cap body, and is provided between the outer lid and the inner lid to lock the inner lid to the outer lid in a swingable manner. A locking means for integrally opening and closing the outer lid and the inner lid, and the outer lid or the inner lid being detachably engaged with the cap body,
A hook mechanism for holding the closed state of the outer lid and the inner lid, wherein the hook mechanism is detachably provided between the cap body and either the outer lid or the inner lid; It is supported on the cap body so as to be freely rotatable up and down, and comprises an operation part for applying an operation force and a hook piece formed with a push-up part for lifting one of the outer lid and the inner lid by the operation force. Cap structure of airtight wide mouth container.