JP3145243U - Airtight cap device - Google Patents

Abstract

An airtight cap device capable of achieving both airtightness and prevention of pumping up is provided.
An airtight cap device that secures an airtight state in an inner space related to a distal end portion of a shaft body 101 by attaching an inner peripheral portion thereof to the outer peripheral portion of the shaft body 101 when the shaft body 101 is mounted. A cap member 2a having a communication hole 22a that allows the inner space and the outer space to communicate with each other, and an annular elastic member 2b wound around the outer periphery of the cap member 2a so as to close the communication hole 22a. 2b is an airtight cap device that allows exhaust from the inner space through the communication hole 22a when the shaft body 101 enters, and seals the communication hole 22a from the outside when the shaft body 101 is mounted.
[Selection] Figure 2

Description

  The present invention relates to an airtight cap device used for the purpose of preventing drying and solidification of volatile contents such as a solid body and a pigment filled in a shaft body of a pencil-type cosmetics, a shaft body of a writing instrument, and other shaft bodies, for example. .

As a conventional hermetic cap device, for example, an outer cap having an annular step on a side wall and an axial movement within the outer cap, an annular end facing the annular step on the side wall, and the inside and outside of the inner cap. Disclosed is an inner cap having a communication hole for communication, and an elastic body that is interposed between the inner cap and the outer cap and biases the annular end portion of the inner cap so as to be in close contact with the annular step portion of the outer cap. (For example, refer to Patent Document 1). According to such an airtight cap device, when the shaft body of the pen-type cosmetic is mounted, the annular end portion and the annular step portion are kept until the outer peripheral portion of the shaft body is in close contact with the inner peripheral portion of the inner cap. Since a gap is secured between them, it becomes possible to prevent pump-up, and after the outer periphery of the shaft body is in close contact with the inner periphery of the inner cap, the annular end of the inner cap is moved by the biasing force of the elastic body. Since it is in close contact with the annular step portion of the outer cap, it is possible to ensure airtightness while preventing pump-up. Here, pump-up refers to a phenomenon in which, when the cap is fitted to the shaft body, a force is applied in a direction in which the cap is detached from the shaft body by pressurizing the inside of the cap.
JP 2001-252131 A

  By the way, there are a plurality of hermetic cap devices including the above-mentioned hermetic cap device that ensure both hermeticity and prevention of pump-up, but many of these are accommodated in the outer cap and the outer cap so as to be movable in the axial direction. The inner cap and the double-structured cap with an elastic body interposed between the caps are intended to achieve both airtightness and prevention of pumping up. Since almost no cap device has been proposed, there are currently limited technology options.

  Accordingly, an object of the present invention is to provide an airtight cap device that can achieve both airtightness prevention and pump-up prevention with a separate configuration completely different from the prior art.

  In order to solve the above problems, the hermetic cap device according to the present invention secures an airtight state in the inner space related to the distal end portion of the shaft body by attaching the inner peripheral portion to the outer peripheral portion of the shaft body when the shaft body is mounted An airtight cap device, comprising: a cap member having a communication hole for communicating the inner space and the outer space on the side wall portion; and an annular elastic member wound around the outer periphery of the cap member so as to close the communication hole. The annular elastic member is characterized by allowing exhaust from the inner space through the communication hole when the shaft body enters, and sealing the communication hole from the outside when the shaft body is mounted.

  According to such an airtight cap device, since the shaft body is provided with the annular elastic member that allows exhaust from the inner space through the communication hole when the shaft body enters, and seals the communication hole from the outside when the shaft body is mounted, It is possible to ensure both airtightness and prevention of pump-up by a separate configuration completely different from the technology.

  In such technical means, from the viewpoint of securing the operation of the apparatus so that the annular elastic member wound around the outer peripheral portion of the cap member does not shift in the axial direction, the outer peripheral portion of the cap member It is preferable that an annular groove portion into which the annular elastic member is fitted is formed along the circumferential direction, and a communication hole is provided in the annular groove portion.

  In this case, from the viewpoint of ensuring the workability when the annular elastic member is attached to the cap member as well as ensuring the operation of the apparatus, the annular elastic member has a substantially cross-sectional shape. The annular groove is preferably formed in a circular shape, and the cross-sectional shape of the annular groove is substantially V-shaped, and a communication hole is preferably provided at the bottom of the annular groove.

  According to the hermetic cap device according to the present invention, it is possible to achieve both airtightness prevention and pump-up prevention with a separate configuration completely different from the prior art.

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

  FIG. 1 is a longitudinal sectional view showing an overall configuration of an airtight cap device according to an embodiment of the present invention (when a pencil-type cosmetic is not attached), and FIG. 2 is a longitudinal sectional view showing an overall configuration of the airtight cap device (pencil). 3 is a perspective view showing an external configuration of a cap member applied to the airtight cap device, FIG. 4 is a side view showing the external configuration of the cap member, and FIG. A sectional view and FIG. 6 are longitudinal sectional views showing a partial configuration of the cap member.

  In the present embodiment, the airtight cap device has an airtight state in the inner space related to the distal end portion of the pencil-type cosmetic product when the pencil-type cosmetic product that is the shaft body is attached, so that the inner peripheral portion closely contacts the outer peripheral portion of the pencil-type cosmetic product. It secures and plays the role which prevents dry solidification of volatile contents, such as solid cosmetics and a pigment with which it fills in pencil-type cosmetics.

  Specifically, as shown in FIGS. 1 and 2, the hermetic cap device is configured to include a covering member 1 and an apparatus main body 2 accommodated in the covering member 1.

  Hereinafter, each of these components will be described in more detail.

(1) Cover member 1
As shown in FIGS. 1 and 2, the covering member 1 serves to increase the decorative value of the airtight cap device in the present embodiment by covering the outside and the front side of the device main body 2 described later.

  Specifically, the coating | coated member 1 is comprised as what exhibits a top cylinder shape (top cylinder shape) (refer FIG.1 and FIG.2).

  Here, the covering member 1 may be appropriately selected regardless of whether it is made of metal, resin, or the like, but from the viewpoint of making it less susceptible to external environmental changes such as temperature and humidity, It is preferable to use a material having rigidity that does not cause twisting or warping.

  Specifically, as shown in FIG. 1, the covering member 1 is connected to the rear side from the covering top wall portion 1a having a circular flat plate shape formed in a direction perpendicular to the axial direction. A covering large-diameter side wall portion 1b formed in a cylindrical shape from a substantially leading end to a middle portion relating to the rear end, and a middle portion relating to the rear end disposed behind the rear end of the covering large-diameter side wall portion 1b. A coated small-diameter side wall portion 1c formed in a cylindrical shape having a smaller inner diameter than the coated large-diameter side wall portion 1b across the rear end, and a stepped side wall portion that is a boundary between the coated large-diameter side wall portion 1b and the coated small-diameter side wall portion 1c 1d is integrally formed.

  In addition, as shown in FIG. 2, the inner peripheral surface of the coated small-diameter side wall portion 1 c is in contact with or close to the outer peripheral surface of the pencil-type cosmetic product 101 in the entire circumferential direction. This is intended to improve the above appearance, and is not intended to ensure an airtight state in the inner space related to the tip of the pencil-type cosmetic product 101.

(2) Device body 2
As shown in FIGS. 1 and 2, the apparatus main body 2 is configured to include a cap member 2a and an O-ring 2b that is an annular elastic member (see FIG. 6).

  First, as shown in FIGS. 1 and 3 to 5, the cap member 2 a has a front cap portion 21 having a cylindrical shape (cylindrical shape), and a crest connected to the rear side from the rear end of the front cap portion 21. The rear cap portion 22 having a cylindrical shape (topped cylindrical shape) is integrally formed.

  Specifically, as shown in FIGS. 1 and 3 to 5, the front cap portion 21 can expand and contract in the axial direction by providing a notch hole 21 a that is notched so as to have a spiral shape on the side wall. The function as a spring member which is an elastic body is exhibited. That is, the front cap portion 21 is assembled and fixed to the inside of the covering member 1 by sandwiching the cap member 2a between the covering top wall portion 1a and the stepped side wall portion 1d while being crushed in the axial direction. Playing a role. The front cap portion 21 also plays a role of absorbing manufacturing errors regarding the length of the cap member 2a.

  On the other hand, as shown in FIGS. 3 to 5, the rear cap portion 22 is configured to have a communication hole 22 a that allows the inner space and the outer space to communicate with the cap small-diameter side wall portion 22 d. Specifically, as shown in these drawings, a plurality (four places) of communication holes 22a are provided at equal intervals along the circumferential direction. 1 and 2, an O-ring 2b is wound around the outer periphery of the rear cap portion 22 so as to close the communication hole 22a.

  By such a cap member 2a, the communication hole 22a and the O-ring 2b, a double-structured cap member 2a composed of the inner cap member 2a and the outer cap member 2a and an elastic body interposed between the cap members 2a are used. It is possible to exert the basic function of the present invention to ensure airtightness while preventing pump-up by a separate configuration that is completely different from the prior art that has configured the valve mechanism.

  In the present embodiment, as shown in FIGS. 1 and 2, an annular groove 22 b into which the O-ring 2 b is fitted is formed along the circumferential direction on the outer periphery of the rear cap portion 22. A communication hole 22a is provided in the groove 22b.

  By adopting such a configuration, it is possible to lock the O-ring 2b wound around the outer periphery of the cap member 2a so as not to be displaced in the axial direction, thereby preventing pump-up. However, it is possible to ensure the operation of the hermetic cap device in the present embodiment to ensure hermeticity.

  Here, as shown in FIGS. 1 and 2, the annular groove portion 22b in the present embodiment is formed in a shape having a transverse cross-sectional shape that is wide open toward the upper side, which is substantially V-shaped. A communication hole 22a is provided at the bottom of the annular groove 22b. In addition, as shown in these drawings, the O-ring 2b in the present embodiment has a substantially circular cross-sectional shape (see FIG. 6).

  By adopting such a configuration, it is possible not only to ensure the operation of the hermetic cap device, but also to ensure workability when the O-ring 2b is mounted on the outer peripheral portion of the cap member 2a. It has become.

  Specifically, as shown in FIG. 1, the rear cap portion 22 is connected to the rear side from the front cap portion 21 and is formed into a circular flat plate shape in a direction perpendicular to the axial direction. A cap small-diameter side wall portion 22d connected to the rear side from the cap top wall portion 22c and formed in a cylindrical shape from the front end to the middle portion of the center, and disposed behind the rear end of the cap small-diameter side wall portion 22d. A cap large-diameter side wall portion 22e formed in a cylindrical shape having a larger inner diameter than the cap small-diameter side wall portion 22d from the middle portion to the rear end of the center, and the front end and the rear end are the cap small-diameter side wall portion 22d and It comprises an inclined side wall portion 22f connected to the cap large diameter side wall portion 22e.

  Here, as shown in FIG. 2, the inclined side wall portion 22 f has an inclined surface that follows the inclined surface of the outer peripheral portion on the front end side of the pencil-type cosmetic 101 on the inner peripheral portion thereof. As shown in the figure, the inclined surface serves as a stopper that regulates the insertion length of the pencil-type cosmetic 101 into the rear cap member 2a when the pencil-type cosmetic 101 is mounted.

  Moreover, the cap large diameter side wall part 22e has the inner side annular convex part 22g extended over the whole circumferential direction in the inner peripheral part, as shown in FIG.1 and FIG.3-5. As shown in FIG. 2, the inner annular convex portion 22 g comes into close contact with the outer peripheral portion of the pencil-type cosmetic product 101 when the pencil-type cosmetic product 101 is attached. It is possible to ensure an airtight state in the space.

  Further, as shown in FIGS. 1, 3 and 5, the cap large-diameter side wall portion 22e extends over the entire outer peripheral portion in the circumferential direction, and is always in contact with the inner peripheral portion of the covering member 1. Thus, the outer annular convex portion 22h that prevents the cap member 2a from swinging in the lateral direction in the covering member 1 is provided.

  In the present embodiment, as shown in FIGS. 1 and 2, the outer annular convex portion 22h formed on the outer peripheral portion of the cap member 2a is formed only at one place in the middle portion of the center of the cap member 2a. Therefore, the front end portion or the rear end portion of the cap member 2a may swing around the outer annular convex portion 22h as a fulcrum. However, in the present embodiment, the outer annular convex portion 22h is used as a fulcrum by considerably increasing the tension of the cap member 2a sandwiched and assembled between the covering top wall portion 1a and the stepped side wall portion 1d. Oscillation is prevented and the assembly stability of the cap member 2a with respect to the covering member 1 is secured.

  Here, as such a cap member 2a, PE resin (high density polyethylene, low density polyethylene, linear low density polyethylene), polycarbonate resin, ABS resin, PBT resin, AS resin, PCTA resin, PP resin, etc. Although it may be selected from known materials as appropriate, from the viewpoint of making it less susceptible to changes in the external environment such as temperature and humidity, use a material that does not cause twisting or warping. It is preferable.

  By the way, as the rear cap portion 22 of the cap member 2a in the present embodiment, it is indispensable that the cap member 2a is mounted in the covering member 1 through the opening of the covering member 1, It is necessary to use a material having such a small rigidity that it can be mounted. On the other hand, the front cap portion 21 is large enough to ensure the assembly stability of the cap member 2a sandwiched and assembled between the covering top wall portion 1a and the stepped side wall portion 1d with respect to the covering member 1. It is necessary to use a material with rigidity that exerts tension.

  Therefore, in the present embodiment, the rigidity of the rear cap portion 22 is considerably reduced by selecting the material of the cap member 2a as a whole corresponding to the small rigidity required for the rear cap portion 22. The rigidity of the front cap part 21 is considerably increased by setting the wall thickness of the front cap part 21 to be large corresponding to the large rigidity required for the front cap part 21.

Next, as shown in FIGS. 1 and 2, the O-ring 2 b has a substantially circular cross-sectional shape, and the rear cap portion 22 covers the communication hole 22 a provided in the cap small-diameter side wall portion 22 d. It is comprised as what was wound around the outer peripheral part (refer FIG. 6).
The O-ring 2b serves to allow exhaust from the inner space through the communication hole 22a when the pencil-type cosmetic 101 enters, and serves to seal the communication hole 22a from the outside when the pencil-type cosmetic 101 is attached. (See FIG. 2).

  By such an O-ring 2b, the communication hole 22a and the cap member 2a, a double-structured cap member 2a composed of the inner cap member 2a and the outer cap member 2a and an elastic body interposed between the cap members 2a are used. It is possible to exert the basic function of the present invention to ensure airtightness while preventing pump-up by a separate configuration that is completely different from the prior art that has configured the valve mechanism.

  In the present invention, the covering member is not essential, the coloring of the cap member and the annular elastic member is changed to enhance the design property, the annular elastic member is made transparent and a part of it is looked into, and the contents of the cosmetic are colored. Thus, discrimination can be enhanced. In addition, the circular elastic member can be selected from a circular cross section, a rectangular shape, a trapezoidal shape, and a V shape. If the annular elastic member is exposed without the covering member, it can be prevented from slipping when the cap is detached. Handling property can be improved.

  Next, the operation of the hermetic cap device according to the present embodiment will be described with reference to FIG.

  First, when the user inserts the pencil-type cosmetic 101 into the cap member 2a, the portion related to the taper of the pencil-type cosmetic 101 first passes through the portion related to the coated small-diameter side wall 1c of the rear cap portion 22, Subsequently, the outer peripheral portion of the pencil-type cosmetic 101 that passes through the portion related to the inner annular convex portion 22g of the rear-side cap portion 22 and subsequently follows the tapered portion of the pencil-type cosmetic 101 is the rear-cap portion 22. It enters into the portion related to the inner annular convex portion 22g.

  Then, in the state where the communication hole 22a of the rear cap portion 22 is sealed from the outside by the O-ring 2b, the inner annular convex portion 22g of the rear cap portion 22 is in close contact with the outer peripheral portion of the pencil-type cosmetic product 101. The air pressure in the inner space of the rear cap portion 22 related to the front end portion of the cosmetic product 101 gradually increases.

  Then, since the increase in the atmospheric pressure in the inner space of the rear cap portion 22 results in an increase in the pressing force applied to the O-ring 2b from the inside through the communication hole 22a, when the atmospheric pressure in the inner space of the rear cap portion 22 gradually increases, The pressing force applied to the O-ring 2b gradually increases.

  When the pressing force applied to the O-ring 2b exceeds a certain limit, the O-ring 2b is deformed, so that the sealing of the communication hole 22a by the O-ring 2b is released, and the air in the inner space of the rear cap portion 22 is It will come out to outside space through the communicating hole 22a.

  Here, since the O-ring 2b is selected so as to release the sealing with respect to the communication hole 22a with a pressing force at a level at which the pump-up phenomenon cannot occur, the rear side when the pencil-type cosmetic 101 enters The air pressure in the inner space of the cap portion 22 does not rise to a level where a pump-up phenomenon occurs.

  Next, when the portion related to the taper of the pencil-type cosmetic product 101 abuts against the inclined side wall portion 22f of the rear cap portion 22, the mounting of the pencil-type cosmetic product 101 on the airtight cap device according to the present embodiment is completed (FIG. 2). State shown in

  When the installation of the pencil-type cosmetic product 101 is completed, when the atmospheric pressure in the inner space of the rear cap portion 22 exceeds a certain limit, the O-ring 2b is deformed to instantaneously seal the communication hole 22a with the O-ring 2b. However, after the sealing is released, the sealing of the communication hole 22a by the O-ring 2b is not released when the pencil-type cosmetic 101 is attached.

  On the other hand, at the moment when the installation of the pencil-type cosmetic 101 is completed, if the pressure in the inner space of the rear cap portion 22 does not exceed a certain limit, the O-ring 2b is sealed against the communication hole 22a when the pencil-type cosmetic 101 is mounted. It will not be released.

  As described above, in the hermetic cap device according to the present embodiment, when the pencil-type cosmetic product 101 enters, exhaust from the inner space through the communication hole 22a is allowed, and when the pencil-type cosmetic product 101 is attached, the communication hole 22a. It is comprised as what was equipped with the O-ring 2b which seals from the outside.

  Therefore, according to such an airtight cap device, it is possible to achieve both airtightness prevention and pump-up prevention with a separate configuration completely different from the prior art.

  As described above, in the present embodiment, the case where the present invention is applied to a pencil-type cosmetic has been described. However, the present invention is not limited to such an embodiment. As long as it is used for the purpose of preventing solidification and liquid volatile contents from drying and solidifying, it may be applied to other cosmetics such as brush pens, or to writing instruments other than cosmetics, pharmaceuticals and other shafts. May be.

It is a longitudinal cross-sectional view (at the time of pencil-type cosmetics non-wearing) which shows the whole structure of the airtight cap apparatus which concerns on one embodiment of this invention. It is a longitudinal cross-sectional view (at the time of mounting | wearing with pencil type cosmetics) which shows the whole structure of the airtight cap apparatus. It is a perspective view which shows the external appearance structure of the cap member applied to the same airtight cap apparatus. It is a side view which shows the external appearance structure of the cap member. It is AA sectional drawing in FIG. It is a longitudinal cross-sectional view which shows the partial structure of the cap member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Covering member 1a Covering top wall part 1b Covering large diameter side wall part 1c Covering small diameter side wall part 1d Stepped side wall part 2 Device main body 2a Cap member 2b O-ring 21 Front cap part 21a Notch hole 22 Rear cap part 22a Communication hole 22b Annular groove 22c Cap top wall 22d Cap small-diameter side wall 22e Cap large-diameter side wall 22f Inclined side wall 22g Inner annular convex 22h Outer annular convex 101 Pencil-type cosmetics

Claims (3)

An airtight cap device that secures an airtight state in an inner space related to a distal end portion of the shaft body by attaching an inner peripheral portion to the outer peripheral portion of the shaft body when the shaft body is mounted,
A cap member having a communication hole for communicating the inner space and the outer space on the side wall;
An annular elastic member wound around the outer periphery of the cap member so as to close the communication hole,
The annular elastic member allows exhaust from the inner space through the communication hole when a shaft body enters, and seals the communication hole from the outside when the shaft body is mounted.
Airtight cap device. An annular groove portion in which the annular elastic member is fitted is formed along the circumferential direction on the outer peripheral portion of the cap member, and the communication hole is provided in the annular groove portion,
The hermetic cap device according to claim 1. The annular elastic member is formed in a substantially circular shape in cross-sectional shape,
The annular groove has a substantially V-shaped cross section, and the communication hole is provided at the bottom of the annular groove.
The hermetic cap device according to claim 2.

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