JP2021078800A - Hermetic rod-like cosmetic feeding container - Google Patents

Abstract

To prevent loosening of a cap, ejection of inner pressure, etc., when the internal pressure rises at the time of sealing a hermetic rod-like cosmetic feeding container.SOLUTION: The cosmetic feeding container is composed of: a rotary feeding mechanism for rolling up and down a rod-like cosmetic by relatively turning a sleeve and a rotary cylinder; a body cylinder for holding the rotary cylinder in a non-rotatable state and having a fitting part in a tip section; and a cap fitted on the fitting part. The fitting part is composed of a screw fitting part and a hermetic fitting part. In the screw fitting part, a screw projection is projectingly provided and, in an inner wall of a lower part of the cap, there are provided a screw groove screwed with the screw projection, and a packing rib for closely sticking to an outer periphery of the hermetic fitting part. In a structure in which the container inside is hermetically sealed by the packing rib closely sticking to the hermetic fitting part, with the screw projection and the screw groove screwed onto each other, a hermetically sealed stroke, from after the packing rib comes into contact with a tip of the hermetic fitting part until a tip of the cap comes into contact with a shoulder, is made shorter than a screwing length from after the screw groove screws onto the screw projection until the tip of the cap comes into contact with the shoulder.SELECTED DRAWING: Figure 4

Description

The present invention relates to an airtight mechanism capable of storing a stick-shaped cosmetic containing a volatile component in a feeding container in which a stick-shaped cosmetic such as lipstick is stored so as to be able to be fed out.

Conventionally, in order to make it possible to store stick-shaped cosmetics containing volatile components in a stick-shaped cosmetics feeding container that can deliver stick-shaped cosmetics such as lipstick, airtightness that does not volatilize the volatile components in the container to the outside. The mechanism was essential. As this airtight mechanism, a method is known in which a packing is arranged between the container body and the cap, and when the cap is fitted to the container body, the inside of the container and the inside of the cap are sealed by the packing. In the case of this method, the container body and the inside of the cap could be sealed with one packing.

Further, as a method of sealing the packing, a method of abutting the end portion of the container with the packing to seal the packing is common. However, in the case of this method, since the container body is brought into contact with each other to obtain a seal, a certain amount of gap is required between the cap and the end of the cap in the fitting direction with the container body. This gap was not preferable for a stick-shaped cosmetic container such as a lipstick container that emphasizes aesthetics.

Therefore, Japanese Patent No. 3153992 (hereinafter referred to as Patent Document 1) proposes a method of fitting the fitting portion of the main body and the packing of the cap to obtain airtightness at the outer periphery of the fitting portion and the inner circumference of the packing. There is. In the case of this method, since the airtightness is obtained in the radial direction of the container, the gap between the end of the cap and the container body as described above is not required, and the appearance is good.

However, the method of Patent Document 1 requires a certain amount of stroke from the start of airtightness between the fitting portion and the packing to the end of fitting. As a result, the internal pressure inside the container and cap increased due to the piston action during the capping process (from the start of airtightness to the end of fitting). In this state, the relative pressure difference between the atmosphere and the container becomes large due to the temperature rise in the container, volatility of volatile components, pressure drop in the atmosphere, etc., and the pressure difference exceeds the cap fitting force. , The pressure inside the container pushed up the cap, the cap floated up, and the airtight state collapsed.

This problem can be solved by screwing the cap and the container body together as described in Jitsuzensho 62-159809 (hereinafter referred to as Patent Document 2). It was possible to prevent the airtightness from collapsing due to the floating of the air.

Japanese Patent No. 3153992 Jitsukaisho 62-159809

However, when the cap was rotated to release the screw with the container body in order to remove the cap, there was a risk that the internal pressure suppressed by the screw would suddenly blow out and surprise, or the cap would be blown off. ..

The rotary feeding mechanism 191 and 192 for raising and lowering the red plates 201 and 202 holding the rod-shaped cosmetics 231 and 232 by relatively rotating the sleeves 221 and 222 and the rotary cylinders 211 and 192, and the sleeves 221 and 222 Fitting of the main body cylinders 291,292 and the main body cylinders 191,292, which are engaged and held in a non-rotatable manner with the rotating cylinders 211 and 212 protruding from the tip portion and provided with fitting portions 351 and 352 at the tip portion. The fitting portions 351 and 352 are composed of caps 301 and 302 that are detachably fitted to the portions 351 and 352, and the fitting portions 351 and 352 are composed of screw fitting portions 381 and 382 and closed fitting portions 371 and 372, and are screw-fitted. Screw protrusions 391 and 392 are projected from the portions 381 and 382, and the caps 301 and 302 are fitted to the screw fitting portions 381 and 382 when the caps 301 and 302 are fitted to the lower inner walls of the caps 301 and 302. Threaded grooves 431 and 432 to be screwed into the portions 391 and 392 and packing ribs 421 and 422 which are in close contact with the outer periphery of the sealed fitting portions 371 and 372 when the caps 301 and 302 are fitted are provided, and the caps 301 and 302 are fitted. At the time, the packing ribs 421 and 422 are in close contact with the sealed fitting portions 371 and 372 in a state where the screw protrusions 391 and 392 and the screw grooves 431 and 432 are screwed together to seal the inside of the container. After the screw grooves 431 and 432 of the caps 301 and 302 are screwed into the screw protrusions 391 and 392 of the main body cylinders 291,292, the tips of the caps 301 and 302 abut on the shoulders 361 and 362 of the main body cylinders 291,292. After the packing ribs 421 and 422 of the caps 301 and 302 come into contact with the tips of the sealed fitting portions 371 and 372 of the main body cylinders 291,292, the tips of the caps 301 and 302 come into contact with the tips of the caps 301 and 302 rather than the screw lengths L1 and L2. Even when the sealing strokes S1 and S2 until they come into contact with the shoulders 361 and 362 of the main body cylinders 291, 292 are shortened and the sealing of the packing ribs 421 and 422 and the sealing fitting portions 371 and 372 is released. The screw protrusions 391 and 392 and the screw grooves 431 and 432 are screwed together.

As described above, in the present invention, after the screw protrusions 391 and 392 of the main body cylinders 191 and 292 are screwed into the screw grooves 431 and 432 of the caps 301 and 302, the tips of the caps 301 and 302 are the main body cylinders 291,292. The packing ribs 421 and 422 of the caps 301 and 302 abut on the tips of the sealed fitting portions 371 and 372 of the main body cylinders 291,292 rather than the screw lengths L1 and L2 until they abut on the shoulders 361 and 362. By shortening the sealing strokes S1 and S2 from when the tips of the caps 301 and 302 come into contact with the shoulders 361 and 362 of the main body cylinders 291, 292, the caps 201 and 302 are removed in order to remove the caps 301 and 302. Even when the sealing ribs 421 and 422 of the caps 301 and 302 and the sealed fitting portions 371 and 372 of the main body cylinders 291,292 are released by rotating the caps 301 and 302, the screw grooves 431 and 432 of the caps 301 and 302 are released. Since the screwing of the screw protrusions 391 and 392 of the main body cylinders 291,292 is maintained, the caps 301 and 302 are rotated to release the screwing with the main body cylinders 291,292 before the inside of the container is released. Since the sealing is released, it is possible to prevent the sudden ejection of the internal pressure and the accompanying blow-off of the caps 301 and 302.

It is a front sectional view of the airtight bar-shaped cosmetics feeding container of Example 1 of this invention. It is a partially enlarged cross-sectional view of the A arrow view part in FIG. It is a front sectional view of the airtight rod-shaped cosmetics feeding container of Example 1 of the present invention in a state where the cap is pulled out to the unsealed state. It is a partially enlarged sectional view of the B arrow-viewing part in FIG. It is a front sectional view of the airtight rod-shaped cosmetics feeding container of Example 2 of this invention. It is a partially enlarged sectional view of the C arrow view part in FIG. It is a front sectional view of the airtight rod-shaped cosmetics feeding container of Example 2 of the present invention in a state where the cap is pulled out to the unsealed state. FIG. 3 is a partially enlarged cross-sectional view of the D arrow-viewing portion in FIG.

Example 1 of the present invention will be described with reference to the drawings. The rotary feeding mechanism 191 of the first embodiment of the present invention includes a red plate 201, an intermediate screw cylinder 1, a rotary cylinder 211, and a sleeve 221.

The red plate 201 for accommodating and holding the stick-shaped cosmetics 231 has an anti-rotation piece 2 projecting from the outer wall and is slidably installed in the sleeve 221. A screw rod 3 hangs down from the lower end of the red plate 201. A first male screw 4 is screwed on the outer circumference of the screw rod 3. The lower end of the first male screw 4 is closed. The screw rod 3 is inserted into the intermediate screw cylinder 1.

The inner wall of the intermediate screw cylinder 1 is provided with a protruding first female screw 5 into which the first male screw 4 of the screw rod 3 is screwed. The screw rod 3 and the intermediate screw cylinder 1 are designed so that the first female screw 5 comes into contact with the end of the first male screw 4 and does not fall off. A second male screw 6 is screwed on the outer wall of the intermediate screw cylinder 1. The lower end of the second male screw 6 is closed as well as the first male screw 4. The intermediate screw cylinder 1 is inserted into the rotary cylinder 211.

The inner wall of the rotary cylinder 211 is provided with a protruding second female screw 7 into which the second male screw 6 of the intermediate screw cylinder 1 is screwed. The intermediate screw cylinder 1 and the rotary cylinder 211 are designed so that the second female screw 7 comes into contact with the end of the second male screw 6 and does not fall off. The upper part of the rotary cylinder 211 is a connecting portion 8 having a reduced outer diameter, and a connecting groove 241 is engraved on the outer wall of the connecting portion 8. The lower outer wall of the connecting portion 8 is provided with a retaining step portion 9 and a rotation stopper knurl 251. The connecting portion 8 of the rotary cylinder 211 is inserted at the lower end of the sleeve 221.

The inner wall of the sleeve 221 is engraved with a guide groove 261 in which the rotation prevention piece 2 of the red plate 201 is engaged to guide the sleeve 221 so as to be non-rotatable and slidable. Further, a connecting convex portion 271 that engages with the connecting groove 241 of the connecting portion 8 and rotatably connects the sleeve 221 and the rotary cylinder 211 so as not to fall off is provided on the inner side wall of the lower end of the sleeve 221.

The rotary feeding mechanism 191 of the first embodiment of the present invention is the above, and when the sleeve 221 and the rotary cylinder 211 are relatively rotated, the first male screw provided on the screw rod 3 of the red plate 201 that is synchronously rotated with the sleeve 221 by the guide groove 261. The red plate 201 slides up and down by the screwing action of the first female screw 5 and the second male screw 6 of the intermediate screw cylinder 1 between the second female screw 7 provided on the inner wall of the rotary cylinder 211 and the rotary cylinder 211. .. The rotary feeding mechanism 191 is built in the exterior body 281.

The exterior body 281 is composed of a main body cylinder 291 and a cap 301. The main body cylinder 291 is composed of an outer cylinder 311 and a fitting cylinder 10, and the cap 301 is composed of an outer cap 321 and an inner cap 331, each of which is assembled so as not to fall off. Next, the exterior body 281 will be described.

The main body cylinder 291 has a bottomed cylinder shape, and the flange portion 341 protruding from the side surface of the fitting cylinder 10 and the tip end portion of the outer cylinder 311 are integrally assembled by ultrasonic welding. On the inner side wall of the lower part of the fitting cylinder 10, the rotary feeding mechanism 191 and the main body cylinder 291 are rotated by engaging with each of the retaining step portion 9 and the rotary stopper knurl 251 provided on the rotary cylinder 211 of the rotary feeding mechanism 191. A retaining protrusion 11 and a rotation-preventing rib 121 are provided to prevent the protrusion from falling off easily.

The tip portion of the fitting cylinder 10 is a fitting portion 351 that protrudes upward from the outer cylinder 311 and the cap 301 is detachably fitted, and a shoulder portion 361 is formed at the tip portion of the outer cylinder 311. The tip portion of the fitting portion 351 is a small-diameter sealed fitting portion 371, and the lower portion of the sealed fitting portion 371 is a large-diameter screw fitting portion 381. A screw protrusion 391 is provided so as to project from the outer wall of the screw fitting portion 381.

In the cap 301, a cup-shaped inner cap 331 made of a soft resin is integrally assembled inside the outer cap 321 by adhesion. The length of the inner cap 331 is set shorter than that of the outer cap 321 so that the lower inner wall 411 of the outer cap is exposed. Then, when the cap 301 is fitted to the fitting portion 351 of the main body cylinder 291, the inner cap lower inner wall 401 is screwed into the sealed fitting portion 371 of the fitting portion 351 and the outer cap lower inner wall 411 is screwed into the fitting portion 351. It is designed to face each of the joints 381.

A packing rib 421 is provided around the inner wall 401 below the inner cap. The packing rib 421 is in close contact with the outer wall of the sealed fitting portion 371 of the main body cylinder 291. The inside of the main body cylinder 291 is sealed by this close contact. Further, a screw groove 431 is screwed into the inner wall 411 below the outer cap. The screw groove 431 has an open groove at the lower end of the outer cap 321 so that the screw protrusion 391 provided in the screw fitting portion 381 of the main body cylinder 291 can be freely screwed in and out, and the inner cap 331 Maintain a tight seal inside.

The packing rib 421 is tightly fitted rather than the screw length L1 from when the screw groove 431 and the screw protrusion 391 are screwed together until the lower end of the cap 301 comes into contact with the shoulder portion 361 of the main body cylinder 291. The sealing stroke S1 from the contact with the tip of the portion 371 to the contact with the lower end of the cap 301 with the shoulder portion 361 of the main body cylinder 291 is set shorter. As a result, even when the sealing of the packing rib 421 and the sealed fitting portion 371 is released, the screw protrusion 391 and the screw groove 431 are screwed together.

The first embodiment of the present invention is not limited to the above-mentioned rotary feeding mechanism 191 as long as the outer diameter of the rotary cylinder 211 is the same as or smaller than the outer diameter of the sleeve 221. It is feasible.

Example 2 of the present invention will be described with reference to the drawings. The rotary feeding mechanism 192 of the second embodiment of the present invention includes a red plate 202, a rotary cylinder 212, and a sleeve 222.

The leg tube 13 hangs down from the lower end of the red plate 202 that fits and holds the stick-shaped cosmetic 232. A screw convex portion 14 is provided so as to project from the lower side wall of the leg cylinder 13. The red plate 202 is slidably housed in the sleeve 222.

A slit-shaped guide groove 262 is formed in the lower side wall of the sleeve 222 so that the screw convex portion 14 of the red plate 202 penetrates and guides the red plate 202 in the sleeve 222 so as to be slidable up and down without rotation. There is. A connecting convex portion 272 is provided around the outer wall above the guide groove 262 of the sleeve 222. The portion of the sleeve 222 below the connecting convex portion 272 is inserted into the rotating cylinder 212.

A connecting groove 242 that rotatably engages with and connects to the connecting convex portion 272 of the sleeve 222 is engraved on the upper inner wall of the rotating cylinder 212. On the lower inner wall of the connecting groove 242, a spiral groove 15 is screwed into which a screw convex portion 14 penetrating the guide groove 262 of the sleeve 222 is screwed. A rotation stop knurl 252 is provided on the outer wall of the rotary cylinder 212.

The rotary feeding mechanism 192 of the second embodiment of the present invention is the above. When the sleeve 222 and the rotary cylinder 212 are rotated relative to each other, the screw provided on the leg cylinder 13 of the red plate 202 that penetrates the guide groove 262 and rotates synchronously with the sleeve 222. Since the joint convex portion 14 is screwed into the spiral groove 15 of the rotary cylinder 212, the red plate 202 slides up and down by the screwing action. The rotary feeding mechanism 192 is built in the exterior body 282.

The exterior body 282 is composed of a main body cylinder 292 and a cap 302. The main body cylinder 292 is composed of an outer cylinder 312 and a tail plug 16. The cap 302 is composed of an outer cap 322 and an inner cap 332, and is assembled so as not to fall off. Next, the exterior body 282 will be described.

The outer cylinder 312 of the main body cylinder 292 has a pipe shape with openings at both ends, and a fitting portion 352 in which the cap 302 is detachably fitted is provided at the upper portion, and a shoulder portion is provided at the base portion of the fitting portion 352. It constitutes 362. The tip portion of the fitting portion 352 is a small-diameter sealed fitting portion 372, and the lower portion of the sealed fitting portion 372 is a large-diameter screw fitting portion 382. A screw protrusion 392 is projected from the outer wall of the screw fitting portion 382.

A rotary feeding mechanism 192 is inserted into the outer cylinder 312 from below, and a sleeve 222 protrudes from the fitting portion 352. The rotation stop rib 122 on the inner wall of the outer cylinder 312 engages with the rotation stop knurl 252 provided on the outer wall of the rotation cylinder 212 of the rotation feeding mechanism 192 to hold the rotation cylinder 212 non-rotatably in the outer cylinder 312. Is provided. A tail plug 16 is fastened to the lower part of the outer cylinder 311 to hold the rotary feeding mechanism 192 in the outer cylinder 311 so as not to fall off. The sleeve 222 of the rotary feeding mechanism 192 rotatably protrudes from the outer cylinder 311 so that the sleeve 222 and the outer cylinder 311 can rotate relative to each other.

In the second embodiment of the present invention, the outer cylinder 311 and the rotary cylinder 212 are engaged with each other by the rotation stopper knurl 252 and the rotation stopper rib 122, but the method is not limited to this method. Although not shown, the rotary cylinder 212 may be provided with a notch and may be engaged with the outer cylinder 312 to prevent rotation.

A collar portion 342 projects radially from the lower end portion of the tail plug 16, and the collar portion 342 and the lower end portion of the outer cylinder 312 are integrally assembled by ultrasonic welding. A receiving groove 17 is engraved on the outer peripheral wall above the flange portion 342, and an O-ring 18 is wound around the receiving groove 17. When the tail plug 16 is assembled to the outer cylinder 312, the O-ring 18 is in close contact with the inner side wall of the outer cylinder 312 and seals between the outer cylinder 312 and the tail plug 16.

In the cap 302, a cup-shaped inner cap 332 made of soft resin is integrally assembled inside the outer cap 322 by adhesion. The length of the inner cap 332 is set shorter than that of the outer cap 322, and the lower inner wall 412 of the outer cap is exposed. Then, when the cap 302 is fitted to the fitting portion 352 of the main body cylinder 292, the inner cap lower inner wall 402 is screwed into the sealed fitting portion 372 of the fitting portion 352, and the outer cap lower inner wall 412 is screwed into the fitting portion 352. It is designed to face each of the joints 382.

A packing rib 422 is provided around the inner side wall 402 of the lower part of the inner cap. The packing rib 422 is in close contact with the outer wall of the sealed fitting portion 372 of the main body cylinder 292 to seal the inside of the inner cap 332. Further, a screw groove 432 is screwed into the inner wall 412 below the outer cap. The screw groove 432 is open at the lower end of the outer cap 322, and the screw protrusion 392 provided in the screw fitting portion 382 of the main body cylinder 292 is screwed so as to be freely removable, and the inner cap 332 is screwed. Maintain a tight seal inside.

The packing rib 422 is tightly fitted rather than the screw length L2 from when the screw groove 432 and the screw protrusion 392 are screwed together until the lower end of the cap 302 comes into contact with the shoulder portion 362 of the main body cylinder 292. The sealing stroke S2 from the contact with the tip of the portion 372 to the contact with the lower end of the cap 302 with the shoulder portion 362 of the main body cylinder 292 is set shorter. As a result, even when the sealing of the packing rib 422 and the sealed fitting portion 372 is released, the screw protrusion 392 and the screw groove 432 are screwed together.

The second embodiment of the present invention is not limited to the above-mentioned rotary feeding mechanism 192, and can be implemented as long as the outer diameter of the rotary cylinder 212 is larger than the outer diameter of the sleeve 222. is there.

191,192 Rotating feeding mechanism 201,202 Red plate 211,212 Rotating cylinder 221,222 Sleeve 231,232 Rod-shaped cosmetics 291,292 Body cylinder 301, 302 Cap 351,352 Fitting part 361,362 Shoulder part 371,372 Sealed fitting Joint part 381,382 Screw fitting part 391,392 Screw protrusion 421,422 Packing ribs 431,432 Thread grooves L1, L2 Screw length S1, S2 Sealing stroke

Claims (1)

A rotary feeding mechanism (191, 2021) that raises and lowers the red plate (201, 202) that holds the stick-shaped cosmetics (231,232) by rotating the sleeve (221,222) and the rotating cylinder (211,212) relative to each other. 192) and the sleeve (221,222) are engaged and held in a non-rotatable manner in a state where the sleeves (221,222) protrude from the tip portion, and the rotary cylinders (211,212) of the feeding mechanism (191,192) are engaged and held, and fitted into the tip portion. A main body cylinder (291,292) provided with a joint portion (351,352) and a cap (301, 302) detachably fitted to the fitting portion (351,352) of the main body cylinder (291,292). Consists of
The fitting portion (351,352) is composed of a screw fitting portion (381,382) and a closed fitting portion (371,372), and the screw fitting portion (381,382) has a screw protrusion portion (391). , 392), and screw grooves (431,432) screwed into the screw protrusions (391,392) on the inner wall of the cap (301,302) mouth when the cap (301,302) is fitted. And, when the caps (301, 302) are fitted, the packing ribs (421, 422) that are in close contact with the outer periphery of the closed fitting portion (371, 372) are convexly provided.
When the caps (301, 302) are fitted, the screw protrusions (391,392) of the main body cylinder (291,292) and the screw grooves (431,432) of the caps (301,302) are screwed together to form the cap (431,432). With the tip of 301, 302) in contact with the shoulders (361, 362) of the main body cylinder (291, 292), the packing ribs (421, 422) of the cap (301, 302) are in contact with the main body cylinder (291, 421). In a configuration in which the inside of the container is sealed in close contact with the closed fitting portion (371, 372) of 292).

After the screw protrusions (391,392) of the main body cylinder (291,292) and the screw grooves (431,432) of the caps (301,302) are screwed together, the tip of the cap (301,302) is the main body cylinder (291). , 292) The packing ribs (421, 422) of the caps (301, 302) are more than the screw lengths (L1, L2) until they come into contact with the shoulders (361, 362) of the main body cylinder (291, 292). Sealing stroke (321, 362) from contacting the tip of the sealed fitting portion (371, 372) to contacting the tip of the cap (301, 302) with the shoulder portion (361, 362) of the main body cylinder (291,292). Shorten S1, S2)
Even when the sealing of the packing ribs (421, 422) and the hermetic fitting portion (371, 372) is released, the screw protrusions (391, 392) and the screw grooves (431, 432) are screwed together. An airtight stick-shaped cosmetics feeding container characterized by being present.

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