Discharge container

Abstract

To provide a discharge container capable of suppressing loosening of screw fitting of an attachment part which is attached through screw fitting and suppressing a vertical width of an outer peripheral part of the attachment part.SOLUTION: A discharge container 1 comprises: a mouth part 2a; a container body 2 having a trunk part 2b and a bottom part configured to be stuck in this order; a discharge device 3 having an attachment part 3a and discharging contents 4 in the container body 2; a male screw part 6 at a mouth part 2a side and a female screw part 7 at an attachment part 3a side formed by fitting a screw fitting part 5 continuously or intermittently extending over one round to attach the attachment part 3a to the mouth part 2a; and a part 9 to be run-over in an under-cut shape at a mouth part 2a side and a run-over part 10 of an under-cut shape at an attachment part 3a side formed by fitting to each other through running over in a vertical direction of a loosen stop fitting part 8 continuously and intermittently extending over one round in a circumferential direction above the screw fitting part 5 to suppress loosening of the screw fitting part 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dispensing container. [Background technology]

[0002] A known discharge container has a container body having a mouth, a body, and a bottom in that order, a dispenser having an attachment part for discharging the contents in the container body, and a male screw part on the mouth side and a female screw part on the attachment part side formed by fitting together threaded fitting parts to attach the attachment part to the mouth (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-143670 [Patent Document 2] Japanese Patent Application Publication No. 2023-176649 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described discharge container, it is sometimes desirable to reduce the vertical width of the outer periphery of the attachment part from the viewpoint of design, etc. However, when the vertical width is reduced, the length of the screw fitting part is reduced, which causes a problem that the screw fitting becomes weaker and more likely to come loose.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a discharge container that can suppress the vertical width of the outer periphery of the mounting part while suppressing loosening of the screw fitting of the mounting part that is attached by screw fitting. [Means for solving the problem]

[0006] One aspect of the present invention is as follows.

[0007] [1] a container body having a mouth, a body, and a bottom, in this order; a dispenser having an attachment portion and configured to dispense the contents in the container body; A male screw portion on the mouth portion side and a female screw portion on the attachment portion side are formed by fitting together thread fitting portions that extend continuously or intermittently over one or more turns in order to attach the attachment portion to the mouth portion; A discharge container having an undercut-shaped crossing portion on the mouth side and an undercut-shaped crossing portion on the mounting portion side, which are formed by fitting together by climbing over an anti-loosening fitting portion in the vertical direction, and which extends continuously or intermittently around the circumference above the screw fitting portion and prevents the screw fitting portion from loosening.

[0008] [2] A discharge container as described in [1], which has a convex vertical rib extending downward from the underside of the lower end of the male screw portion, and a concave vertical rib provided on the top surface of the threads of the lower end of the female screw portion, which fits over the convex vertical rib by riding over it in the circumferential direction, thereby suppressing loosening of the screw fitting portion.

[0009] [3] a machine thread portion having a thread height smaller than that of the male thread portion, extending parallel to the male thread portion, spaced apart from the upper surface of the male thread portion, and having a thread crest surface connected to the lower surface of the male thread portion; The top surface of the thread of the female screw portion rides on the top surface of the thread of the small screw portion when the screw fitting portion is formed, and prevents the screw fitting portion from loosening by friction force. [1] A discharge container as described in [2].

[0010] [4] the mounting portion includes a cap outer peripheral portion having the female thread portion and the overhang portion, a fitting and holding portion extending radially inward from an upper end of the cap outer peripheral portion, and a seal tube extending downward from the fitting and holding portion and contacting an inner peripheral surface of the opening portion; The dispenser is a dispensing container described in any one of [1] to [3], which has a cylinder portion that is fitted into and held by the fitting holding portion, and a pump operating portion that slides up and down on the cylinder portion to dispense the contents in the container body through the cylinder portion. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a discharge container that can suppress the vertical width of the outer periphery of the mounting part while suppressing loosening of the mounting part that is attached by screw fitting. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view of a discharge container according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view of part A in FIG. [Figure 3] 3 is a cross-sectional view of FIG. 2 taken along line B-B. [Figure 4] FIG. 2 is an enlarged cross-sectional view showing a portion corresponding to portion A in FIG. 1 of a discharge container according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] As shown in Figures 1 to 3, in the first embodiment of the present invention, a dispensing container 1 comprises a container body 2 having a mouth portion 2a, a body portion 2b, and a bottom portion (not shown) connected in this order; a dispenser 3 having an attachment portion 3a and dispensing a content 4 in the container body 2; a male thread portion 6 on the mouth portion 2a side and a female thread portion 7 on the attachment portion 3a side which are formed by fitting together thread fitting portions 5 which extend continuously or intermittently over one turn or more to attach the attachment portion 3a to the mouth portion 2a; and an undercut-shaped (i.e., having a downward surface) to-be-ridden portion 9 on the mouth portion 2a side and an undercut-shaped (i.e., having an upward surface) riding-over portion 10 on the attachment portion 3a side which are formed by fitting together anti-loosening fitting portions 8 which extend continuously or intermittently over one turn in the circumferential direction above the thread fitting portion 5 and prevent loosening of the thread fitting portion 5. In this embodiment, the mouth portion 2a is annular about the central axis O, the direction along the central axis O of the mouth portion 2a is referred to as the up-down direction, the direction from the bottom toward the mouth portion 2a along the up-down direction is referred to as the upward direction, the opposite direction is referred to as the downward direction, the direction perpendicular to the central axis O is referred to as the radial direction, and the direction going around the central axis O is referred to as the circumferential direction. The male thread portion 6 is configured as a single-start screw formed by a spiral thread centered on the central axis O of the mouth portion 2a. In this embodiment, the to-be-ridden portion 9 is configured as the lower half of a convex circumferential rib that extends in the circumferential direction and protrudes radially outward, and the riding portion 10 is configured as the upper half of a convex circumferential rib that extends in the circumferential direction and protrudes radially inward, but is not limited to this.

[0015] According to the above configuration, when the female thread portion 7 on the mounting portion 3a engages with the male thread portion 6 on the mouth portion 2a to form the thread engagement portion 5, the overriding portion 10 rides over the overriding portion 9 downward to engage, forming the locking engagement portion 8 on the upper side of the thread engagement portion 5. This allows the mounting portion 3a to be securely attached to the mouth portion 2a by the thread engagement force of the thread engagement portion 5 of one or more turns and the vertical engagement force of the locking engagement portion 8 around the entire circumference. Furthermore, because the thread engagement portion 5 only needs to have one or more turns, the vertical width of the outer periphery of the mounting portion 3a can be reduced by reducing the number of turns of the male thread portion 6 and the female thread portion 7 as necessary. Furthermore, the user can sense that the thread engagement portion 5 has been formed by the feeling when the overriding portion 10 rides over the overriding portion 9.

[0016] The discharge container 1 has a convex vertical rib 11 extending downward from the underside of the lower end of the male thread portion 6, and a concave vertical rib 12 provided on the crest surface of the threads at the lower end of the female thread portion 7, which fits into the convex vertical rib 11 by riding over in the circumferential direction, thereby preventing loosening of the screw fitting portion 5. The screw fitting portion 5 is formed by fitting the female thread portion 7 on the mounting portion 3a side to the male thread portion 6 on the mouth portion 2a side, and after the riding portion 10 rides over the riding portion 9 downward and fits, the concave vertical rib 12 fits into the convex vertical rib 11. The user can also sense that the fitting is complete by the click sound that is produced when the concave vertical rib 12 and the convex vertical rib 11 fit together. Although the convex vertical rib 11 and the concave vertical rib 12 may be omitted, it is preferable to provide them because this further prevents loosening of the screw fitting portion 5.

[0017] As in a second embodiment shown in FIG. 4 , the discharge container 1 has a machine thread portion 13 that has a thread height (radial width of the thread) smaller than that of the male thread portion 6, extends parallel to the male thread portion 6, is spaced apart from the upper surface of the male thread portion 6, and has a thread crest that connects to the lower surface of the male thread portion 6, and the thread crest of the female thread portion 7 rides on the thread crest of the machine thread portion 13 when the screw-engaging portion 5 is formed, thereby suppressing loosening of the screw-engaging portion 5 by frictional force. In the second embodiment, after the screw-engaging portion 5 is formed and the overriding portion 10 rides downward over the overriding portion 9 to engage, the thread crest of the female thread portion 7 rides on the thread crest of the machine thread portion 13 from the state shown by the two-dot chain line in FIG. 4 to the state shown by the solid line. The discharge container 1 may be configured to have both the convex vertical rib 11 and the concave vertical rib 12 and the machine thread portion 13, in which case the screw-engaging portion 5 can be made even more resistant to loosening.

[0018] 1, the attachment portion 3a includes a cap outer peripheral portion 3a1 having a female thread portion 7 and a crossover portion 10, a fitting / retaining portion 3a2 extending radially inward from the upper end of the cap outer peripheral portion 3a1, and a sealing tube 3a3 extending downward from the fitting / retaining portion 3a2 and contacting the inner peripheral surface of the mouth portion 2a. The dispenser 3 includes a cylinder portion 3b fitted into and held by the fitting / retaining portion 3a2, and a pump actuation portion 3c that slides up and down on the cylinder portion 3b when pressed down and then released, thereby discharging the contents 4 from the container body 2 through the cylinder portion 3b. With this configuration, the cap outer peripheral portion 3a1 having the female thread portion 7 and the crossover portion 10 can be prevented from being displaced radially outward due to elastic deformation by the sealing tube 3a3 contacting the inner peripheral surface of the mouth portion 2a, thereby increasing the fitting force of the locking fitting portion 8 above the thread fitting portion 5. Furthermore, since the cylinder portion 3b can be held by the fitting holding portion 3a2, the vertical width of the outer circumferential portion 3a1 of the cap of the mounting portion 3a can be further reduced compared to a configuration in which a flange provided on the cylinder portion 3b and a gasket provided on the underside of the flange are sandwiched between the upper end surface of the mouth portion 2a and the underside of the mounting portion 3a to achieve sealing and holding, as in a conventional discharge container 1 having a pump operating portion 3c.

[0019] The contents 4 are not particularly limited, but in this embodiment, they are liquid cosmetics such as lotion, antiperspirant, deodorant, hair styling product, etc.

[0020] The cylinder portion 3b has a cylinder body 3b1 along which a piston 3d2 of the pump actuation portion 3c slides in the up and down direction, and an extension portion 3b2 that extends radially outward and upward from the upper end of the cylinder body 3b1 and is fitted into and held by the fitting holding portion 3a2. The pump actuation portion 3c has a piston pressure-accumulating cylinder member 3d having a pressure-accumulating cylinder body 3d1 and a piston 3d2, and a holding member 3e having a pressure-accumulating piston 3e1, a pressure-accumulating portion 3e2, and a push-down head 3e3. When the push-down head 3e3 is pressed down, the pressure-accumulating piston 3e1 slides downward relative to the pressure-accumulating cylinder body 3d1, which has a smaller cross-sectional area than the cylinder body 3b1, and then the piston 3d2 slides downward relative to the cylinder body 3b1. When the push-down head 3e3 is released, the pressure-accumulating cylinder The dispenser 3 has a connection portion 3f that connects the holding member 3e to the piston accumulator cylinder member 3d so that the accumulator piston 3e1 slides upward relative to the main body 3d1 before the piston 3d2 slides upward relative to the cylinder main body 3b1, and a pressure accumulator portion 3e2 that opens an internal flow path 3g that discharges the content 4 from a discharge port 3g2 of the press-down head 3e3 when the pump operating portion 3c lowers to increase pressure in a pump chamber 3g1 defined by the accumulator cylinder main body 3d1, the accumulator piston 3e1, the cylinder main body 3b1, and the piston 3d2. The dispenser 3 has a biasing member 3h that is a compression spring that biases the holding member 3e upward, and a support member 3i that is attached to the upper end of the cylinder main body 3b1 and supports the lower end of the biasing member 3h. The pump operating section 3c has a pressure accumulator section 3e2, and is configured to use a two-stage piston in which the pressure accumulator piston 3e1, which has a smaller cross-sectional area than the piston 3d2, descends first. Therefore, with a single pressing operation in which the pressing head 3e3 is pressed down with, for example, the index finger, a large amount can be discharged vigorously from the start of the pressing operation until the end of the pressing operation.

[0021] The holding member 3e has a pressure-accumulating piston 3e1, a holding member main body 3e4 that rises and falls together with the pressure-accumulating piston 3e1 and has a depression head 3e3, and a pressure-accumulating biasing member 3e5 that is a compression spring, the pressure-accumulating section 3e2 opens and closes the internal flow path 3g between the pressure-accumulating piston 3e1 and the holding member main body 3e4, and the pressure-accumulating biasing member 3e5 biases the pressure-accumulating piston 3e1 in a direction in which the pressure-accumulating section 3e2 closes the internal flow path 3g. Note that the configuration of the pressure-accumulating section 3e2 is not limited to this.

[0022] By pressing the press-down head 3e3, the pressure-accumulating piston 3e1 slides downward relative to the pressure-accumulating cylinder body 3d1, accumulating pressure in the pump chamber 3g1, the pressure-accumulating section 3e2 opens the internal flow path 3g, and the contents 4 are sent from the pump chamber 3g1 to the discharge port 3g2 and forcefully discharged as a mist. By continuing the pressing operation, the piston 3d2 slides downward relative to the cylinder body 3b1, and more of the contents 4 are sent from the pump chamber 3g1 to the discharge port 3g2, continuing the forceful discharge. Furthermore, by releasing the pressing operation, the pressure-accumulating piston 3e1 slides upward relative to the pressure-accumulating cylinder body 3d1, the pressure-accumulating section 3e2 closes the internal flow path 3g, and the piston 3d2 slides upward relative to the cylinder body 3b1, creating a negative pressure in the pump chamber 3g1, and the contents 4 are sucked from the container body 2 into the pump chamber 3g1. The discharge port 3g2 is not limited to a configuration that discharges the contents 4 as a mist.

[0023] The mounting portion 3a has a cap outer peripheral portion 3a1 which has an outer wall 3a4 which extends downward from the outer peripheral edge of a top wall 3a7 of the mounting portion 3a all the way around and forms the outer peripheral surface of the cap outer peripheral portion 3a1, an inner wall 3a5 which extends downward from the top wall 3a7 all the way around, radially inward of the outer wall 3a4, and has a female thread portion 7 and a ride-over portion 10 on its inner peripheral surface, and a plurality of vertical ribs 3a6 which connect the outer wall 3a4 and the inner wall 3a5. Note that the configuration of the cap outer peripheral portion 3a1 is not limited to this.

[0024] The inner peripheral surface of the mouth portion 2a has a stepped surface 2a1 consisting of an annular upper surface extending around the entire circumference, and the extension portion 3b2 of the cylinder portion 3b has an opposing surface 3b3 consisting of a lower surface facing the stepped surface 2a1. According to the above configuration, the engagement of the extension portion 3b2 with the fitting holding portion 3a2 can be prevented from coming loose due to an impact that occurs when the discharge container 1 is dropped or an operation to press down the pump operating portion 3c, by the opposing surface 3b3 of the extension portion 3b2 of the cylinder portion 3b abutting against the stepped surface 2a1 of the mouth portion 2a.

[0025] The extension portion 3b2 has an extension tubular portion 3b4 that extends vertically and is held by fitting into the fitting-and-holding portion 3a2, and a flange-like protrusion 3b5 that protrudes radially outward from the extension tubular portion 3b4 and has an opposing surface 3b3 on its underside. The mouth portion 2a has an annular step portion 2a2, and the portion of the mouth portion 2a above the annular step portion 2a2 forms an enlarged diameter portion whose inner and outer circumferential surfaces are larger than those of the portion below, and the upper surface of the annular step portion 2a2 is the step surface 2a1. With this configuration, the mouth portion 2a is configured as a wide opening, which facilitates the refilling operation when refilling the contents 4 into the container body 2 for use. Furthermore, the wide opening enhances the screw fitting force provided by the thread fitting portion 5, which has one or more turns, and the vertical fitting force provided by the locking fitting portion 8, which extends all the way around.

[0026] The discharge container 1 has an overcap 14 that is removably attached to the attachment portion 3a and covers the press-down head 3e3 when not in use, but the configuration of the discharge container 1 is not limited to this.

[0027] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present invention. [Explanation of symbols]

[0028] 1 Discharge container 2 Container body 2a Mouth 2a1 Step surface 2a2 Annular step 2b Torso 3 Dispenser 3a Attachment part 3a1 Cap outer periphery 3a2 Fitting holding part 3a3 Seal tube 3a4 Exterior wall 3a5 inner wall 3a6 vertical rib 3a7 Ceiling wall 3b Cylinder section 3b1 Cylinder body 3b2 Extension 3b3 Opposite surface 3b4 Extension cylinder part 3b5 Projection 3c Pump operating section 3d Piston accumulator cylinder component 3d1 Accumulator cylinder body 3d2 piston 3e Retaining member 3e1 Accumulator piston 3e2 Pressure accumulator 3e3 Press Head 3e4 Retaining member body 3e5 Accumulated pressure biasing member 3f Connection 3g Internal flow path 3g1 Pump room 3g2 outlet 3h biasing member 3i Support member 4 Contents 5 Threaded fitting 6 Male thread 7 Female thread 8 Anti-loosening fitting 9. Crossing section 10. Crossing 11 Convex vertical rib 12 concave longitudinal rib 13 Machine screw part 14 Overcap O center axis

Claims

1. a container body having a mouth, a body, and a bottom, in this order; a dispenser having an attachment portion and configured to dispense the contents in the container body; A male screw portion on the mouth portion side and a female screw portion on the attachment portion side are formed by fitting together thread fitting portions that extend continuously or intermittently over one or more turns in order to attach the attachment portion to the mouth portion; A discharge container having an undercut-shaped crossing portion on the mouth side and an undercut-shaped crossing portion on the mounting portion side, which are formed by fitting together by climbing over each other in the vertical direction, and an anti-loosening fitting portion that extends continuously or intermittently around the circumference above the screw fitting portion and prevents the screw fitting portion from loosening.

2. 2. The discharge container according to claim 1, further comprising: a convex vertical rib extending downward from the underside of the lower end of the male thread portion; and a concave vertical rib provided on the top surface of the threads of the lower end of the female thread portion, which fits over the convex vertical rib by overriding in the circumferential direction, thereby suppressing loosening of the screw fitting portion.

3. a machine thread portion having a thread height smaller than that of the male thread portion, extending parallel to the male thread portion, spaced apart from the upper surface of the male thread portion, and having a thread crest surface connected to the lower surface of the male thread portion; The discharge container according to claim 1 , wherein the thread crest surface of the female screw portion rides on the thread crest surface of the machine screw portion when the thread fitting portion is formed, and prevents the thread fitting portion from loosening by frictional force.

4. the mounting portion includes a cap outer peripheral portion having the female thread portion and the overhang portion, a fitting and holding portion extending radially inward from an upper end of the cap outer peripheral portion, and a seal tube extending downward from the fitting and holding portion and contacting an inner peripheral surface of the opening portion; The discharge container according to claim 1, wherein the discharger has a cylinder portion that is fitted into and held by the fitting holding portion, and a pump operating portion that slides up and down on the cylinder portion to discharge the contents in the container body through the cylinder portion.

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