JP5452750B1 - Cartridge type cosmetic container - Google Patents

Abstract

An object of the present invention is to improve the certainty that a push rod is moved to a retreat limit when a cartridge body is removed.
A main body outer cylinder 30 to which a cartridge body 2 is attached, a driving body 60 rotatable relative to the main body outer cylinder 30, and a relative rotation between the main body outer cylinder 30 and the driving body 60 are drawn out to be inside the cartridge body 2. A push rod 50 for extruding the cosmetic A and a screw spring 40 accommodated in the main body outer cylinder 30 and contracted in the axial direction when the cartridge body 2 is attached. The screw spring 40 is a shaft inside the main body outer cylinder 30. A rear end portion 42 in which the position in the direction is defined, a front end portion 41 that is close to the rear end portion 42 when the cartridge body 2 is attached, and a plurality of leaf spring portions 43 that bend toward the inner periphery when contracted in the axial direction, The leaf spring portion 43 is provided with a female screw projection 44 that meshes with the male screw 51 of the push rod 50 by bending the leaf spring portion 43, and the rear end portion 42 is formed continuously from the plurality of leaf spring portions 43. Comprising a plurality of plate members 42a.
[Selection] Figure 1

Description

  The present invention relates to a cartridge-type cosmetic container in which a cartridge body filled with a cosmetic is detachably mounted.

  2. Description of the Related Art Conventionally, a cartridge-type feeding container that allows cosmetics in a cartridge body to advance finely through a tip opening hole of the cartridge body has been used. Some cartridge-type feeding containers are not provided with a feeding mechanism in the cartridge body, and are provided with a feeding mechanism completely separated and independent from the cartridge body.

  In Patent Document 1, when the cartridge body is removed from the threaded portion of the front cylinder, the sliding shaft moves to the extension and retraction limit of the outer cylinder by a spring, so that a new cartridge body can be mounted. Is disclosed. In this container, when the cartridge body is attached, the sleeve having the tapered surface closes the chuck claw of the screw chuck, and the screw on the inner surface of the chuck claw and the screw of the sliding shaft are screwed together. When the cartridge body is removed, the sleeve is separated from the screw chuck by the restoring force of the spring between the sleeve and the chuck, and the chuck claw of the screw chuck that is restrained by the taper surface of the sleeve is expanded by its elasticity. Open. Thereby, the screwing of the screw on the inner surface of the chuck claw and the screw on the sliding shaft is released.

Japanese Utility Model Publication 3-49611

  However, in the container of Patent Document 1, the sliding shaft can be moved to the retreating limit when the cartridge body is removed by a complicated mechanism including a sleeve, a screw chuck, and a spring. In such a complicated mechanism, the chuck claw at the tip of the screw chuck is constrained by the taper surface of the sleeve and bent inward for a long time, so that the chuck claw cannot be expanded only by its elasticity. There is. For this reason, there is a possibility that the sliding shaft cannot be returned to the feeding and retracting limit without releasing the screw engagement between the screw on the inner surface of the chuck claw and the screw of the sliding shaft.

  The present invention has been made in view of the above-described problems, and when the cartridge body is removed, the mechanism for moving the push rod to the withdrawal retreat limit is simplified, and the reliability for moving the push rod to the withdrawal retreat limit is improved. For the purpose.

  The present invention is a cartridge-type cosmetic container to which a cartridge body filled with cosmetics is attached and used, wherein the main body outer cylinder to which the cartridge body is detachably attached and coaxial with the main body outer cylinder And a drive body attached to be relatively rotatable, a male screw formed on the outer periphery, and a push rod that is fed out by relative rotation between the main body outer cylinder and the drive body to push out cosmetics in the cartridge body, and the main body outer cylinder A screw spring that is contracted in the axial direction when the cartridge body is attached, and the screw spring includes a first flat plate portion whose axial position is defined in the main body outer cylinder, When the cartridge body is attached, the second flat plate portion close to the first flat plate portion is connected to the first flat plate portion and the second flat plate portion. A plurality of leaf spring portions bent and a female screw protrusion provided on at least one of the plurality of leaf spring portions and meshed with the male screw when the leaf spring portion is bent, the first flat plate portion or The second flat plate portion is composed of a plurality of plate members formed continuously from the plurality of plate spring portions.

  In the present invention, the screw spring is contracted in the axial direction in a state where the cartridge body is attached to the outer cylinder of the main body, and the leaf spring portion is bent toward the inner periphery. Thereby, the internal thread protrusion provided in the leaf | plate spring part meshes with the external thread of a push rod. When the cartridge body is removed, the engagement between the female thread protrusion of the screw spring and the male thread of the push bar is released, and the push bar can freely move in the axial direction. Therefore, it is possible to simplify the mechanism for moving the push rod to the withdrawal retreat limit when the cartridge body is removed, and to improve the reliability of moving the push rod to the withdrawal retreat limit.

It is sectional drawing of the front of the cartridge type cosmetics container which concerns on embodiment of this invention. It is an exploded view of a cartridge body, (a) is sectional drawing of the front of a cap, (b) is a front view of a cartridge outer cylinder, (c) is a front view of a holding member. It is sectional drawing of the front of a main body outer cylinder. (A) is a front view of a drive body, (b) is a sectional view in FIG. 4 (a), and (c) is a plan view in FIG. 4 (a). (A) is a front view of a push rod, (b) is an enlarged view of the P section of Fig.5 (a). (A) is a development view of the screw spring, (b) is a front view of the screw spring, (c) is a perspective view of the screw spring, and (d) is a screw spring. It is a perspective view which shows the state attached to the cartridge type cosmetic container. It is a figure which shows the state twisted so that the screwing spring might get entangled with the outer periphery of a push rod. In the cartridge type cosmetic container of FIG. 1, it is a figure which shows the state by which the push rod was drawn out to the advance limit. It is a figure which shows the state from which the cartridge body was removed in the cartridge type cosmetic container of FIG. It is sectional drawing of the front of the cartridge type cosmetics container which concerns on the modification of embodiment of this invention. It is an expanded view which shows the 1st modification of a screwing spring. (A) is an expanded view which shows the 2nd modification of a screwing spring, (b) is a perspective view of the 2nd modification of a screwing spring. It is an expanded view which shows the 3rd modification of a screwing spring.

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

  Hereinafter, a cartridge type cosmetic container 1 according to an embodiment of the present invention will be described with reference to FIGS.

  The cartridge type cosmetic container 1 is used with a cartridge body 2 filled with the cosmetic A attached thereto. As shown in FIG. 1, the cartridge-type cosmetic container 1 includes a main body outer cylinder 30 to which the cartridge body 2 is detachably attached, and a drive body 60 that is coaxially attached to the main body outer cylinder 30 and is relatively rotatable. A male screw 51 is formed on the outer periphery, and is pushed by the relative rotation of the main body outer cylinder 30 and the driving body 60 to push out the cosmetic A in the cartridge body 2, and is accommodated in the main body outer cylinder 30, and is stored in the cartridge body. And a screw spring 40 that contracts in the axial direction when attached. The parts for feeding the cosmetic A are not provided in the cartridge body 2 but are collected in the cartridge-type cosmetic container 1.

  First, the cartridge body 2 attached to the cartridge type cosmetic container 1 will be described with reference to FIG.

  The cartridge body 2 rotates around its central axis and is attached to the main body outer cylinder 30. The cartridge body 2 includes a cartridge outer cylinder 20 in which cosmetic A is filled, a holding member 10 that can slide in the cartridge outer cylinder 20 in the axial direction, and a cap 3 that is attached to the cartridge outer cylinder 20. .

  The cosmetic A is filled from the front end opening hole 21a side or from the rear end opening hole 24 side depending on the texture. In addition, the filled cosmetic A is filled in a heated state and becomes a gel or a rod when cooled.

  2B, when the cartridge outer cylinder 20 is attached to the main body outer cylinder 30 with the cosmetic material holding portion 21 in which the front end opening hole 21a is formed and the rear end opening hole 24 being formed. It has the insertion part 25 inserted in the cartridge body 2, and the flange 22 provided between the cosmetics holding | maintenance part 21 and the insertion part 25, and protrudes to an outer periphery.

  The cosmetic material holding part 21 is formed in a cylindrical shape. A cosmetic material A is filled in the inner periphery of the cosmetic material holding portion 21. A plurality of vertical ribs 23 extending in the axial direction from the flange 22 are formed on the outer periphery of the cosmetic material holding portion 21. The vertical ribs 23 lock the cap 3 so as not to be relatively rotatable when the cap 3 is attached.

  The fitting portion 25 is formed in a cylindrical shape. The inner periphery of the fitting part 25 is formed continuously with the inner periphery of the cosmetic material holding part 21. A male screw 20 a is formed in the axial direction from the flange 22 on the outer periphery of the fitting portion 25. The male screw 20 a is screwed into the main body outer cylinder 30.

  When the flange 22 is attached to the main body outer cylinder 30, the flange 22 abuts against the end of the main body outer cylinder 30 to define the relative position in the axial direction. Further, the flange 22 abuts against the end of the cap 3 when the cap 3 is attached, and defines the relative position in the axial direction.

  The holding member 10 is inserted into the inner periphery of a through hole that penetrates the cartridge body 2 in the axial direction. The holding member 10 is located at the rear end of the cosmetic A. As shown in FIG. 2C, the holding member 10 is formed in a substantially cylindrical shape, and has a contact portion 11 with which the push bar 50 contacts and a bottom surface 12 with which the cosmetic A is filled. The holding member 10 does not hold the cosmetic A, but prevents leakage of the filled cosmetic A, and causes the cosmetic A to protrude from the tip opening hole 21a by the movement of the push bar 50.

  As described above, in the cartridge body 2, since the shape of the cartridge outer cylinder 20 and the holding member 10 is simple, the cosmetic A can be directly filled into the cartridge outer cylinder 20.

  As shown in FIG. 2A, the cap 3 is formed in a bottomed cylindrical shape. The cap 3 is attached to the cosmetic material holding portion 21 of the cartridge outer cylinder 20 and closes the tip opening hole 21a. A knurled rib 3 a that engages with the vertical rib 23 of the cartridge outer cylinder 20 is formed on the inner periphery of the open end of the cap 3. When the cap 3 is attached to the cartridge outer cylinder 20, it cannot be rotated relative to the cartridge outer cylinder 20. Therefore, if the user holds and rotates the cap 3, the user can rotate the cartridge outer cylinder 20 at the same time.

  The cap 3 may not be provided when it is desired to reduce the outer diameter of the cartridge type cosmetic container 1 or when the airtightness of the cartridge body 2 is not required.

  The cartridge body 2 configured as described above is configured such that the cap 3 is attached to the cartridge outer cylinder 20 in which the holding member 10 is inserted and the cosmetic material A is filled, and the distal end opening hole 21a is closed, so that the cosmetic material A Can be sold as a single cartridge. Moreover, you may sell as the cartridge type cosmetic container 1 provided with the cartridge body 2 in the state which attached the cartridge body 2 to the cartridge type cosmetic container 1.

  Next, with reference to FIGS. 3 to 7, each component constituting the cartridge type cosmetic container 1 will be described.

  As shown in FIG. 3, the main body outer cylinder 30 is formed in a cylindrical shape. The inner periphery of the main body outer cylinder 30 is separated into a front cavity part 36 and a rear cavity part 37 by a partition wall 35 provided substantially at the center in the axial direction. A through hole 34 through which the rod shaft 55 of the push rod 50 can advance and retreat is formed at the center of the partition wall 35.

  The main body outer cylinder 30 is formed in the vicinity of the end of the rear cavity 37, the female screw 32 formed in the inner periphery in the vicinity of the tip opening hole 31 formed in the end of the front cavity 36, and the driving body 60. And a fitting recess 33 connected to be relatively rotatable.

  The aforementioned insertion portion 25 of the cartridge body 2 is inserted into the front cavity portion 36 from the tip opening hole 31. Then, by rotating the main body outer cylinder 30 and the cartridge body 2 relative to each other around the central axis, the male screw 20 a formed on the cartridge outer cylinder 20 of the cartridge body 2 is screwed into the female screw 32 of the main body outer cylinder 30. Thereby, the cartridge body 2 is screwed and attached to the main body outer cylinder 30.

  A screw spring 40 is inserted into the front cavity 36. When the screw spring 40 is inserted into the front cavity portion 36, the rear end portion 42, which will be described later, is held in the front cavity portion 36 by the force of spreading toward the outer periphery. Therefore, the screw spring 40 does not fall out of the front cavity 36 even when the cartridge body 2 is removed.

  The fitting recess 33 is annularly formed in the inner periphery of the rear cavity portion 37. A fitting projection 65 (described later) of the drive body 60 is fitted into the fitting recess 33.

  As shown in FIG. 4A, the driving body 60 is formed in a bottomed cylindrical shape. The driving body 60 includes a fitting portion 61 that is fitted into the main body outer cylinder 30, a knob portion 62 that is formed continuously from the fitting portion 61 and is used by a user, and is formed on the inner periphery and is not relatively rotatable with the push rod 50. And a plurality of vertical ribs 63 engaged with the.

  The fitting part 61 is formed in a cylindrical shape. On the outer periphery in the vicinity of the proximal end of the fitting portion 61, a fitting convex portion 65 that fits into the fitting concave portion 33 of the main body outer cylinder 30 is provided in an annular shape. An annular groove 66 is recessed in the outer periphery of the fitting portion 61. If an O-ring is inserted into the groove 66, an appropriate resistance can be imparted to the relative rotation between the main body outer cylinder 30 and the driving body 60, and the operational feeling of the user can be improved.

  The knob portion 62 is formed with a larger diameter than the fitting portion 61. The knob portion 62 is formed to have substantially the same diameter as the outer diameter of the main body outer cylinder 30. Thereby, when the driving body 60 is assembled to the main body outer cylinder 30, the outer peripheral surface of the main body outer cylinder 30 and the outer peripheral surface of the knob 62 are substantially flush.

  As shown in FIGS. 4B and 4C, the longitudinal rib 63 extends in the axial direction from the inner peripheral bottom surface 64 to the opening end. The vertical rib 63 engages with a guide groove 56 of a large-diameter portion 54 described later of the push bar 50. In the present embodiment, four vertical ribs 63 are provided.

  As shown in FIG. 5A, the push rod 50 is formed in a substantially cylindrical shape. The push rod 50 is accommodated in the inner periphery of the main body outer cylinder 30 and the driving body 60. The push rod 50 includes a rod shaft 55 provided coaxially with the main body outer cylinder 30 and the driving body 60, a front end portion 53 provided at one end of the rod shaft 55, and a large diameter portion 54 provided at the other end of the rod shaft 55. Have.

  On the outer periphery of the rod shaft 55, as shown in FIG. 5B, a male screw 51, which is a single thread with a pitch P = 0.5 mm and a lead L = 0.5 mm, is formed. The cosmetic A filled in the cartridge body 2 is used by being extruded by a minute amount. Therefore, the pitch of the male screw 51 is set to a pitch at which the push bar 50 can be finely moved. However, the male screw 51 may be a single thread with a pitch P = 1.0 mm and a lead L = 1.0 mm, or a double thread with P = 1.0 mm and a lead L = 2.0 mm.

  A female screw projection 44 (described later) of the screw spring 40 can be engaged with the male screw 51. The stroke of the push rod 50 is determined by the length of the male screw 51 in the axial direction.

  The front end portion 53 is formed in a spherical shape. The front end portion 53 comes into contact with the contact portion 11 of the holding member 10 of the cartridge body 2. Thereby, when the push rod 50 moves in the axial direction, the front end portion 53 presses the holding member 10 and the cosmetic A in the cartridge body 2 is pushed out from the tip opening hole 21a.

  The large diameter portion 54 is formed to have a larger diameter than the rod shaft 55. The large diameter part 54 moves in the driving body 60 in the axial direction. The large-diameter portion 54 defines the extension limit of the push rod 50 when it comes into contact with the bottom surface 64 of the drive body 60. A plurality of guide grooves 56 that engage with the vertical ribs 63 of the driving body 60 are recessed in the axial direction on the outer periphery of the large diameter portion 54. When the guide groove 56 is engaged with the vertical rib 63, relative rotation between the push rod 50 and the driving body 60 becomes impossible. Therefore, when the user picks and rotates the driving body 60, the push rod 50 also rotates at the same time.

  The push bar 50 is intended to advance the cosmetics A in the cartridge body 2 finely. Therefore, in the present embodiment, the push bar 50 cannot be retracted during use, and the advanced cosmetic A can not be pulled back into the cartridge body 2.

  As shown in FIG. 6C, the screw spring 40 is formed in a drum shape. The screw spring 40 includes a rear end portion 42 as a first flat plate portion whose axial position is defined in the main body outer cylinder 30 and a second flat plate portion that is close to the rear end portion 42 when the cartridge body 2 is attached. As the front end portion 41, the plurality of leaf spring portions 43 connecting the front end portion 41 and the rear end portion 42, and the plurality of leaf spring portions 43, the leaf spring portion 43 is attached to the push rod 50. An internal thread protrusion 44 that meshes with the external thread 51 by bending toward the outside is provided.

  The screw spring 40 is formed by bending an extremely thin stainless steel band for a spring. Thereby, durability and restoration property of screwing spring 40 are secured, and it becomes possible to use cartridge type cosmetic container 1 for a long period of time. Alternatively, the screw spring 40 can be formed of other materials such as resin.

  The front end portion 41 is formed in an annular shape. The outer diameter of the front end portion 41 is formed smaller than the inner diameter of the front cavity portion 36 of the main body outer cylinder 30. In the center of the front end portion 41, a through hole 41a is formed through which the rod shaft 55 of the push rod 50 can advance and retreat. A rear end surface 26 (see FIG. 2B) of the cartridge body 2 attached to the main body outer cylinder 30 is in contact with the front end portion 41. The screw spring 40 contracts when the cartridge body 2 presses the front end 41 in the axial direction.

  The rear end portion 42 is composed of a plurality of plate members 42 a formed continuously from the plurality of plate spring portions 43. The rear end portion 42 abuts on the upper end surface 35a (see FIG. 3) of the front cavity portion 36.

  The plate member 42 a is formed in an annular shape having the same shape as the front end portion 41. The outer diameter of the plate member 42 a is formed smaller than the inner diameter of the front cavity portion 36 of the main body outer cylinder 30. The plurality of plate members 42a are formed in a circular shape, have a through hole 42b through which the rod shaft 55 is inserted, and are provided so as to overlap in the axial direction.

  As shown in FIG. 6A, one end 43 a of the leaf spring portion 43 is formed continuously with the front end portion 41, and the plurality of plate members 42 a at the rear end portion 42 are connected to the other end 43 b of the leaf spring portion 43. It is formed continuously. The screw spring 40 is formed by bending one thin plate shown in FIG. In this way, the screw spring 40 is easy to form because it is not necessary to join the plate members 42a by bonding or welding.

  The leaf spring portion 43 bends toward the inner circumference when contracted in the axial direction. Specifically, as shown in FIG. 6D, the leaf spring portion 43 is curved toward the inner periphery when pressed in the axial direction. Instead of this, the leaf spring portion 43 may be formed to bend toward the inner periphery when pressed in the axial direction.

  When the screw spring 40 is not accommodated in the main body outer cylinder 30 (the state shown in FIG. 6B), the angle of the leaf spring portion 43 with respect to the front end portion 41 at one end 43a is accommodated in the main body outer cylinder 30. It is formed so as to be larger than the state (the state shown in FIG. 6C).

  The screw spring 40 is stored in the main body outer cylinder 30 after being compressed in a direction in which the other ends 43b of the leaf spring portions 43 approach each other. That is, the screw spring 40 is accommodated in the main body outer cylinder 30 by reducing the angle of the leaf spring portion 43 with respect to the front end 41 at the one end 43 a from the state where it is not accommodated in the main body outer cylinder 30. As a result, when the screw spring 40 is inserted into the front cavity 36 of the main body outer cylinder 30, the other end 43b of the leaf spring portion 43 tends to expand to the outer periphery due to the restoring force at the one end 43a. The screw spring 40 is held in the front cavity 36 when the plate member 42 a is pressed against the inner periphery of the front cavity 36.

  The leaf spring portion 43 is twisted by rotation when the cartridge body 2 is screwed. Specifically, the leaf spring portion 43 is disposed when the cartridge body 2 is rotated and screwed to the main body outer cylinder 30 with the rear end face 26 of the cartridge body 2 in contact with the front end portion 41. It is twisted by the frictional force between the end face 26 and the front end portion 41.

  The female screw protrusion 44 is provided so as to protrude inside the substantially central portion of the leaf spring portion 43 in the axial direction. As shown in FIG. 6B, it is desirable that the angle β [deg] on the inner side of the female screw protrusion 44 is larger than the angle at which the leaf spring portion 43 cannot be bent and is 80 [deg] or less. When the angle β is 80 [deg] or less, the female screw protrusion 44 meshes with the male screw 51 more firmly than when the angle β is larger than 80 [deg]. Therefore, even if the push rod 50 is pressed in the axial direction when the user uses the cosmetic A, the possibility that the engagement between the male screw 51 and the female screw projection 44 is released is low.

  The female screw protrusion 44 is parallel to the front end portion 41 and the rear end portion 42 because the leaf spring portion 43 is not twisted in a state where the cartridge body 2 is not attached. When the cartridge body 2 is attached, the female screw protrusion 44 meshes with the male screw 51 in a state where the leaf spring portion 43 is twisted so as to be entangled with the outer periphery of the push rod 50 by the rotation of the cartridge body 2 as shown in FIG. The female screw protrusion 44 is formed so as to be inclined in the same direction as the lead angle of the male screw 51 when the leaf spring portion 43 is twisted.

  As a result, the female screw protrusion 44 and the male screw 51 are screwed together with a strong screwing force. Therefore, even when the cosmetic A is in close contact with the inner periphery of the cartridge outer cylinder 20, it can be pushed out with a strong force.

  As shown in FIG. 6D, the screw spring 40 is compressed by α [mm] and twisted by θ [deg]. In addition to this, without twisting the leaf spring portion 43 of the screw spring 40, the leaf spring portion 43 is pressed in the axial direction, compressed by α [mm], and curved toward the inner periphery. In this state, the female screw protrusion 44 may be engaged with the male screw 51 for use.

  As described above, in the screw spring 40, the rear end portion 42 is non-rotatably supported by the main body outer cylinder 30, and the cartridge body 2 is rotated relative to the main body outer cylinder 30 so that the front end portion 41 is moved to the rear end portion. By rotating with respect to 42, the leaf spring portion 43 is twisted. As a result, the female screw protrusion 44 of the leaf spring portion 43 meshes with the male screw 51 of the push bar 50.

  When the cartridge body 2 is removed from the main body outer cylinder 30, the female screw protrusion 44 is separated from the male screw 51 because the leaf spring portion 43 is restored to the original shape (the state shown in FIG. 6C). Thereby, the meshing of the female screw protrusion 44 and the male screw 51 is released.

  The female screw protrusion 44 may be provided on at least one of the plurality of plate spring portions 43. However, when the pair of plate spring portions 43 are provided to face each other as in the present embodiment, both plates are provided. It is desirable that the spring portion 43 be formed.

  It should be noted that the screw spring 40 is placed upside down so that the front end 41 abuts on the upper end surface 35a of the front cavity 36 and the rear end 42 abuts on the rear end surface 26 of the cartridge body 2. You may accommodate in the front cavity part 36. FIG. In this case, the front end portion 41 corresponds to the first flat plate portion, and the rear end portion 42 corresponds to the second flat plate portion.

  Next, the operation of the cartridge type cosmetic container 1 will be described mainly with reference to FIG. 1, FIG. 8, and FIG.

  FIG. 1 shows a state before use of the cartridge type cosmetic container 1. In FIG. 1, the push rod 50 is located at the feeding and retreating limit. At this time, the screw spring 40 is pressed in the axial direction by the cartridge body 2 attached to the main body outer cylinder 30. Therefore, the pair of leaf spring portions 43 of the screw spring 40 are bent toward the inner periphery, and the female screw protrusion 44 provided on the leaf spring portion 43 is engaged with the male screw 51 of the push rod 50.

  From this state, when the user removes the cap 3 and rotates the driving body 60 with respect to the main body outer cylinder 30, the push rod 50 moves forward due to the engagement between the female screw protrusion 44 and the male screw 51. Thereby, the cosmetic A can be used by advancing from the front end opening hole 21a of the cartridge outer cylinder 20.

  When the user continues to rotate the driving body 60 further with respect to the main body outer cylinder 30, as shown in FIG. 8, the push rod 50 is extended to the advancement limit. The advancement limit is defined by the stroke end of the male screw 51 formed on the rod shaft 55 of the push rod 50. Even if the user further rotates the driving body 60 with respect to the main body outer cylinder 30 from the state shown in FIG. 8, the male screw 51 rotates idle due to the female screw protrusion 44 being expanded by the elasticity of the leaf spring portion 43. Therefore, the push rod 50 does not stroke any more.

  At this time, in the cartridge body 2, the holding member 10 has moved to the forward end. Accordingly, most of the cosmetic A is pushed out from the tip opening hole 21a, and the cosmetic A needs to be replaced.

  In the state shown in FIG. 8, when the cartridge body 2 is rotated relative to the main body outer cylinder 30 to remove the cartridge body 2 from the main body outer cylinder 30, the cartridge body 2 is separated from the main body outer cylinder 30. As a result, as shown in FIG. 9, the screw spring 40 is extended in the axial direction by the restoring force and restored to the original state. Accordingly, the pair of leaf spring portions 43 are separated from each other, and the meshing between the female screw projection 44 of the screw spring 40 and the male screw 51 of the push bar 50 is released. Therefore, the push rod 50 can move freely in the axial direction, and in a state close to an upright position, the push rod 50 moves to its payout / retreat limit under its own weight.

  At this time, the screw spring 40 is compressed in a direction in which the other ends 43 b of the leaf spring portions 43 approach each other and is accommodated in the main body outer cylinder 30. Therefore, the plurality of plate members 42a forming the rear end portion 42 tend to be separated from each other on the outer periphery. Therefore, the screw spring 40 is held in the main body outer cylinder 30 by the force with which the plurality of plate members 42a are in close contact with the inner periphery of the main body outer cylinder 30, and does not fall off.

  As described above, when the cartridge body 2 is removed by providing the screw spring 40, the engagement between the female screw protrusion 44 of the screw spring 40 and the male screw 51 of the push rod 50 is released, and the push rod 50 is moved in the axial direction. It can move freely. Therefore, when the cartridge body 2 is removed, the mechanism for moving the push bar 50 to the payback limit can be simplified, and the certainty of moving the push bar 50 to the payback limit can be improved.

  When the used cartridge body 2 is removed from the main body outer cylinder 30 and then a new cartridge body 2 is attached, the state shown in FIG. 1 is obtained again.

  Specifically, when the user holds the cap 3 and engages the male screw 20 a of the cartridge body 2 with the female screw 32 of the main body outer cylinder 30, the rear end surface 26 of the cartridge body 2 and the main body outer cylinder 30. The screw spring 40 is compressed between the upper end surface 35a of the screw.

  Since the pair of leaf spring portions 43 of the screw spring 40 are curved in a drum shape toward the inner periphery, when the front end portion 41 is compressed, it is further curved and abuts against the rod shaft 55 of the push rod 50. At this time, a frictional force between the rear end surface 26 of the cartridge body 2 acts on the front end portion 41 of the screw spring 40. Therefore, the leaf spring portion 43 of the screw spring 40 is twisted so as to be entangled with the outer periphery of the push rod 50, and the female screw protrusion 44 is engaged with the male screw 51 of the push rod 50.

  According to the above embodiment, the following effects are obtained.

  By providing the screw spring 40, when the cartridge body 2 is removed, the engagement between the female screw protrusion 44 of the screw spring 40 and the male screw 51 of the push bar 50 is released, and the push bar 50 can move freely in the axial direction. Become. Therefore, when the cartridge body 2 is removed, the mechanism for moving the push bar 50 to the payback limit can be simplified, and the certainty of moving the push bar 50 to the payback limit can be improved.

  The screw spring 40 is formed of an extremely thin stainless steel band for springs, and is excellent in durability and resilience. Therefore, the cartridge type cosmetic container 1 can be used for a long time. Moreover, since the replaceable cartridge body 2 is composed of only three parts including the cap 3, the cartridge outer cylinder 20, and the holding member 10, it can be provided at low cost.

  Further, as in the modified example shown in FIG. 10, when the cartridge body 2 is removed from the main body outer cylinder 30, the push rod 50 may be forcibly moved to the extension / retraction limit.

  In this modification, there is provided a return spring 5 that pushes back the push bar 50 toward the retreating limit when the cartridge body 2 is detached from the main body outer cylinder 30 and the engagement between the female screw projection 44 and the male screw 51 is released.

  The return spring 5 is a coil spring that is housed between the lower end surface 35 b of the partition wall 35 of the main body outer cylinder 30 and the front end surface 54 a of the large-diameter portion 54 of the push rod 50. The return spring 5 is compressed when the push bar 50 is unwound. When the engagement between the female thread projection 44 of the screw spring 40 and the male thread 51 of the push bar 50 is released, the return spring 5 pushes back the push bar 50 by its urging force and moves it to the extended retreat limit.

  As a result, when the cartridge body 2 is removed from the main body outer cylinder 30, the push rod 50 is always positioned at the extended retreat limit by the urging force of the return spring 5.

  Even if the cartridge body 2 is not mounted, the push rod 50 is restrained in the axial direction, so that it cannot be freely advanced and retracted. Therefore, it is possible to prevent the push bar 50 from advancing against the user's intention.

  By providing the return spring 5, when the push bar 50 moves to the advance advance limit, a clutch sound is generated to inform the user that the push bar 50 is not further extended. Specifically, when the user tries to extend the push rod 50 in the advancement limit of the push rod 50, the female screw protrusion 44 rides on a portion of the rod shaft 55 where the male screw 51 is not formed. When the user tries to further extend the push rod 50, the female screw protrusion 44 is pushed back to the rear end portion of the male screw 51 and meshes with the restoring force of the return spring 5. At this time, a sound is generated by contact between the female screw protrusion 44 and the male screw 51.

  Thereby, the user can know that the push rod 50 is located in the payout ascent limit. Therefore, the user can use the generation of the clutch sound as a guide for replacing the cartridge body 2.

  Hereinafter, the screw springs 140, 240, and 340 according to the first to third modifications of the embodiment of the present invention will be described with reference to FIGS.

  First, with reference to FIG. 11, the screw spring 140 which concerns on the 1st modification of embodiment of this invention is demonstrated.

  The screw spring 140 includes a rear end portion 142 as a first flat plate portion whose axial position is defined in the main body outer cylinder 30 and a second flat plate portion that is close to the rear end portion 142 when the cartridge body 2 is attached. As the front end portion 41, the plurality of leaf spring portions 43 connecting the front end portion 41 and the rear end portion 142, and the plurality of leaf spring portions 43, the leaf spring portion 43 is attached to the push rod 50. An internal thread protrusion 44 that meshes with the external thread 51 by bending toward the outside is provided.

  The rear end portion 142 is composed of a plurality of plate members 142 a formed continuously from the plurality of plate spring portions 43. The rear end 142 abuts on the upper end surface 35a (see FIG. 3) of the front cavity 36.

  The plate member 142a is formed in a C-shaped flat plate shape. The pair of free ends of the plate member 142a is formed with a folded portion 142b that is folded toward the front end portion 41. The outer diameter of the plate member 142 a is formed smaller than the inner diameter of the front cavity portion 36 of the main body outer cylinder 30. The pair of plate members 142a are arranged to face each other on the same plane so as to form a circle, and the bar shaft 55 is inserted between the pair of plate members 142a.

  The screw spring 140 is compressed in a direction in which the other ends 43 b of the leaf spring portions 43 approach each other and is accommodated in the main body outer cylinder 30. As a result, when the screw spring 140 is inserted into the front cavity portion 36, the plurality of plate members 142a of the rear end portion 42 are held in the front cavity portion 36 by the force of spreading toward the outer periphery. Is done.

  Similarly, when the screw spring 140 is applied, when the cartridge body 2 is removed, the engagement between the female screw projection 44 of the screw spring 140 and the male screw 51 of the push rod 50 is released, and the push rod 50 is free in the axial direction. It becomes possible to move. Therefore, when the cartridge body 2 is removed, the mechanism for moving the push bar 50 to the payback limit can be simplified, and the certainty of moving the push bar 50 to the payback limit can be improved.

  Next, with reference to FIG.12 and FIG.13, the screwing spring 240 which concerns on the 2nd modification of embodiment of this invention and the screwing spring 340 which concerns on a 3rd modification are demonstrated.

  As shown in FIGS. 12A and 12B, the screw spring 240 includes a rear end portion 242 as a first flat plate portion whose position in the axial direction is defined in the main body outer cylinder 30, and a cartridge body. Among the plurality of leaf spring portions 43, a front end portion 41 as a second flat plate portion that is close to the rear end portion 242 by attaching 2, a plurality of leaf spring portions 43 that connect the front end portion 41 and the rear end portion 242, It is provided with at least one female screw protrusion 44 that is engaged with the male screw 51 when the leaf spring portion 43 is bent toward the push rod 50.

  The rear end portion 242 includes a plurality of plate members 242 a that are formed continuously from the plurality of plate spring portions 43. The rear end portion 242 contacts the upper end surface 35a (see FIG. 3) of the front cavity portion 36.

  The plate member 242a is formed in a polygonal shape having substantially the same diameter as the front end portion 41. The outer diameter of the plate member 242a is formed smaller than the inner diameter of the front cavity portion 36 of the main body outer cylinder 30. The plurality of plate members 242a have a through hole 242b through which the rod shaft 55 is inserted at the center, and are provided so as to overlap in the axial direction.

  By forming the plate member 242a into a polygonal shape, the plate member 242a can be strongly engaged with the inner periphery of the main body outer cylinder 30 as compared to the circular plate member 42a. Accordingly, the screw spring 240 is prevented from rotating relative to the main body outer cylinder 30 when the cartridge body 2 is attached.

  Note that at least one of the plurality of plate members 242a may be formed in a polygonal shape. Further, the plate member 242a is not limited to a polygonal shape, and a corner that engages with the inner periphery of the main body outer cylinder 30 may be formed on the outer periphery thereof.

  Further, the leaf spring portion 243 is not limited to a pair, and may be provided in three or more pieces as in the third modification shown in FIG. As described above, the number of the leaf spring portions 243 may be any number as long as it is plural.

  The screw spring 240 is compressed in a direction in which the other ends 43 b of the leaf spring portions 43 approach each other and is accommodated in the main body outer cylinder 30. As a result, when the screw spring 240 is inserted into the front cavity portion 36, the plurality of plate members 142a of the rear end portion 42 are held in the front cavity portion 36 by the force of spreading toward the outer periphery. Is done.

  Similarly, when the screw spring 240 is applied, when the cartridge body 2 is removed, the engagement between the female screw projection 44 of the screw spring 240 and the male screw 51 of the push rod 50 is released, and the push rod 50 is free in the axial direction. It becomes possible to move. Therefore, when the cartridge body 2 is removed, the mechanism for moving the push bar 50 to the payback limit can be simplified, and the certainty of moving the push bar 50 to the payback limit can be improved.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Cartridge-type cosmetic container 2 Cartridge body 5 Return spring 10 Holding member 21 Cosmetic holding | maintenance part 30 Main body outer cylinder 40 Screwing spring 41 Front end part (2nd flat plate part)
42 Rear end (first flat plate part)
42a Plate member 43 Plate spring portion 43a One end 43b The other end 44 Female screw projection 50 Push rod 51 Male screw 60 Driver

Claims (11)

A cartridge-type cosmetic container used by attaching a cartridge body filled with a cosmetic,
A main body outer cylinder to which the cartridge body is detachably attached;
A driving body mounted coaxially with the main body outer cylinder and relatively rotatable;
A male screw is formed on the outer periphery, and a push rod that is fed out by relative rotation between the main body outer cylinder and the driving body to push out cosmetics in the cartridge body,
A screw spring accommodated in the main body outer cylinder and contracted in the axial direction by the attachment of the cartridge body,
The screw spring is
A first flat plate portion in which an axial position is defined in the main body outer cylinder;
A second flat plate portion that is close to the first flat plate portion by attaching the cartridge body;
A plurality of leaf spring portions that connect the first flat plate portion and the second flat plate portion and bend toward the inner periphery when contracted in the axial direction;
A female screw projection provided on at least one of the plurality of leaf spring portions, and meshing with the male screw by bending the leaf spring portion;
Said 1st flat plate part or said 2nd flat plate part consists of a some plate member each formed continuously from these plate spring parts, The cartridge type cosmetic container characterized by the above-mentioned. One end of the leaf spring portion is formed continuously with one of the first flat plate portion and the second flat plate portion,
2. The cartridge type makeup according to claim 1, wherein the other plurality of plate members of the first flat plate portion and the second flat plate portion are formed continuously with the other end of the plate spring portion. Container.   The cartridge-type cosmetic container according to claim 2, wherein the screw spring is compressed in a direction in which the other ends of the leaf spring portions approach each other and is accommodated in the main body outer cylinder.   The plurality of plate members are formed in a circular shape, have a through-hole through which the push rod is inserted, and are provided so as to overlap in the axial direction. Cartridge type cosmetic container.   4. The cartridge type according to claim 1, wherein at least one of the plurality of plate members has a corner portion that engages with an inner periphery of the main body outer cylinder on an outer periphery thereof. 5. Cosmetic container.   6. The cartridge type cosmetic container according to claim 5, wherein at least one of the plurality of plate members is formed in a polygonal shape.   The cartridge-type cosmetic container according to any one of claims 1 to 6, wherein the first flat plate portion includes the plurality of plate members. The cartridge body rotates around its central axis and is screwed onto the main body outer cylinder.
8. The female screw protrusion meshes with the male screw in a state in which the leaf spring portion is twisted so as to be entangled with the outer periphery of the push rod by the rotation of the cartridge body. 9. Cartridge type cosmetic container.   9. The cartridge type cosmetic container according to claim 8, wherein the female screw protrusion is formed to be inclined in the same direction as a lead angle of the male screw when the leaf spring portion is twisted.   10. The structure according to claim 1, wherein when the cartridge body is removed from the main body outer cylinder, the leaf spring portion is restored to its original shape, and the engagement between the female screw protrusion and the male screw is released. The cartridge type cosmetic container according to any one of the above.   11. A return spring that pushes back the push bar toward the retreating limit when the cartridge body is detached from the main body outer cylinder and the engagement between the female screw protrusion and the male screw is released. 2. A cartridge type cosmetic container according to 1.