Pump Discharger

Abstract

To provide a pump dispenser that can dispense contents without using spring force. [Solution] The device comprises a main body 2 having a storage chamber U for contents and an outlet 38 for the contents opening on its upper surface O, a head portion 60 supported above the main body 2 so as to be able to move up and down and having an outlet 62 that opens upward, and a cylindrical rotating member 80 having a surrounding surface R that surrounds the outer peripheral surface Q of the head portion 60 and is rotatably positioned relative to the main body 2. A piston portion 78 equipped on the head portion 60 is fitted into a cylinder 43 erected from around the outlet 38 to constitute a discharge pump P. A conversion mechanism F is formed between the rotating member 80 and the head portion 60 to convert the rotational force applied to the rotating member 80 into an upward and downward force applied to the head portion 60. This conversion mechanism F consists of a cam groove G provided around one of the surrounding surface R and the outer peripheral surface Q, including a bottom dead center portion g2 and an top dead center portion g4, and a sliding contact projection 68 attached to the other, which slides within the cam groove G.

Description

[[Technical Field]]

[0001] The present invention relates to a pump discharger. [[Background Art]]

[0002] There has been known a discharge device that includes: a container body having a mouth-neck portion; a pump formed by fitting an actuating member, which is urged upward by a spring force, into a cylinder attached to the mouth-neck portion; and an operation plate having a distal end placed on the top of a push-down head of the pump and pivotally attached to the shoulder of the container body (Patent Document 1). [[Prior Art Documents]] [[Patent Documents]]

[0003] [[Patent Document 1]] Jitsukaihei 7-9784 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] The pump of the discharger disclosed in Patent Document 1 incorporates a coil spring as an urging means. When the spring is made of metal, it is necessary to spend extra effort sorting the spring for disposal; when the spring is made of resin, it has inferior durability due to elastic fatigue.

[0005] An object of the present invention is to provide a pump discharger capable of discharging contents without using spring force. [[Means for Solving the Problem]]

[0006] A first means comprises: a main body 2 that incorporates a storage chamber U for contents and has a content take-out port 38 opened on an upper surface O, a head portion 60 that is supported above the main body 2 to be capable of moving up and down and has a discharge port 62 with an upper opening, and a cylindrical rotating member 80 that has a surrounding surface R surrounding an outer peripheral surface Q of the head portion 60 and is rotatably arranged relative to the main body 2, In a pump discharger in which a discharge pump P is constructed by fitting a piston portion 78 equipped on the head portion 60 into a cylinder 43 erected around the outlet 38, A conversion mechanism F is formed between the rotating member 80 and the head portion 60, which converts the rotational force applied to the rotating member 80 into an upward or downward force applied to the head portion 60. This conversion mechanism F consists of a cam groove G provided around one of the surrounding surface R and the outer peripheral surface Q, including a bottom dead center portion g2 and an upper dead center portion g4, and a sliding contact projection 68 attached to the other of the surrounding surface R and the outer peripheral surface Q, which is slidable within the cam groove G.

[0007] As shown in Figure 1, this device comprises a main body 2 having a storage chamber U for contents and an outlet 38 for the contents opening on its upper surface O; a head portion 60 supported above the main body 2 so as to be able to move up and down and having an outlet 62 that opens upward; and a cylindrical rotating member 80 having a surrounding surface R that surrounds the outer peripheral surface Q of the head portion 60 and is rotatably positioned relative to the main body 2. Furthermore, the discharge pump P is constructed by fitting the piston portion 78, which is equipped on the head portion 60, into the cylinder 43, which is erected around the outlet 38. As described above, a conversion mechanism F is formed between the rotating member 80 and the head portion 60 to convert the rotational force applied to the rotating member 80 into an upward or downward force applied to the head portion 60. This conversion mechanism F consists of a cam groove G provided around one of the surrounding surface R and the outer peripheral surface Q, including a bottom dead center portion g2 and an upper dead center portion g4, and a sliding contact projection 68 attached to the other of the surrounding surface R and the outer peripheral surface Q, which is slidable within the cam groove G. This structure eliminates the need to incorporate a spring into the pump mechanism to raise the head. Therefore, unlike conventional technology, there is no need to separate the metal spring during disposal, nor is there a decrease in durability due to the deterioration of the resin spring.

[0008] The second means has the same features as the first means, and the cam groove G has a portion of the cam groove G corresponding to one cycle of the discharge pump P designated as a cycle end section Z, in which the sliding contact protrusion 68 does not contact the inner surface H of the cam groove G, while the sliding contact protrusion 68 contacts the inner surface H of the cam groove G outside of the cycle end section Z.

[0009] In this system, as shown in Figure 3(A), a portion of the cam groove G, specifically the part corresponding to one cycle of the discharge pump P, is designated as the cycle end section Z. As shown in Figure 3(B), the sliding contact projection 68 does not contact the inner surface H of the cam groove G at the end of the cycle Z, but is formed to contact the inner surface H of the cam groove G everywhere else. With this structure, it is easy to see that one cycle of the discharge pump P has ended because the frictional resistance increases when the head portion 60 rotates relative to the main body 2.

[0010] The third means has the first means, and the cam groove G has a portion of the cam groove G that corresponds to one cycle of the discharge pump P designated as the cycle end portion Z. The sliding contact protrusion 68 is attached to the outer surface portion of the elastic piece 66 that is formed as part of the outer surface wall 65 of the head portion 60 on the outer surface Q. The elastic piece 66 is formed to be elastically deformable in the radial direction of the head portion 60, The rotation of the head portion 60 causes the sliding contact protrusion 68 to enter the cycle end portion Z, which in turn causes the elastic piece 66 to undergo elastic displacement and generate sound.

[0011] In this system, as shown in Figure 3(A), a portion of the cam groove G, specifically the part corresponding to one cycle of the discharge pump P, is designated as the cycle end section Z. Furthermore, as shown in Figure 2(B), the sliding contact protrusion 68 is attached to the outer surface portion of an elastic piece 66 that is formed as part of the outer peripheral wall 65 of the head portion 60. The elastic piece 66 is formed to be elastically deformable in the radial direction of the head portion 60. Furthermore, the rotation of the head portion 60 causes the sliding contact protrusion 68 to enter the cycle end portion Z, which in turn causes the elastic piece 66 to undergo elastic displacement and generate sound. With this structure, this sound makes it easy to tell that one cycle of the discharge pump P has finished.

[0012] The fourth means has any of the first to third means, and the rotating member 80 consists of a main cylindrical body 82 in which the base half 90 has a larger inner diameter via a stepped portion 88 relative to the front half 84, and a sub-cylindrical body 92 having a fitting cylindrical portion 94 that is fitted into the base half 90. By making the insertion length t of the fitting cylinder portion 94 smaller than the vertical length s of the base half portion 90 when viewed from the side, the cam groove G is defined between the tip portion 95 of the fitting cylinder portion 94 and the stepped portion 88 on the surrounding surface R.

[0013] In this mechanism, the rotating member 80 consists of a main cylindrical body 82 in which the base half 90 has a larger inner diameter via a stepped portion 88 relative to the front half 84, as shown in Figure 2(A), and a sub-cylindrical body 92 having a fitting cylindrical portion 94 that is fitted into the base half 90. Furthermore, by making the insertion length t of the fitting cylinder portion 94 smaller than the vertical length s of the base half portion 90 when viewed from the side, a cam groove G is defined between the tip portion 95 of the fitting cylinder portion 94 and the stepped portion 88 on the surrounding surface R. This structure allows for the construction of a conversion mechanism F consisting of a cam groove G and a sliding contact protrusion 68 with a simple configuration. [Effects of the Invention]

[0014] According to the present invention, a springless pump dispenser can be provided that can dispense contents without using spring force. [Brief explanation of the drawing]

[0015] [Figure 1] This is a cross-sectional view of a pump discharger according to an embodiment of the present invention, seen from the side. [Figure 2]Shows the structure of the discharger illustrated in Figure 1, where Figure 1(A) is an enlarged view of the essential part of the discharger, and Figure 1(B) is a perspective view of the head part of the container. [Figure 3] Shows the operation of the conversion mechanism of the discharger in Figure 1, where Figure 3(A) is a panoramic expanded view of the structure of the mechanism seen from the side, and Figure 3(B) is a panoramic expanded view of the structure of the mechanism seen from below. Best Mode for Carrying Out the Invention

[0016] Figures 1 to 3 show a pump discharger according to an embodiment of the present invention. The discharger is composed of a main body 2, a support member 47, an actuating member 58, a rotating member 80, and an overcap 98. However, these structures can be modified as appropriate, and the overcap 98 can be omitted. All of these members can be formed of synthetic resin, thereby allowing disposal without sorting out metal parts during disposal.

[0017] As shown in Figure 1, the main body 2 is a member incorporating a content storage chamber U, and has a content take-out port 38 opening to an opening on the upper surface O thereof, and a cylinder 43 erected from the periphery of the take-out port 38. A piston part 78 provided on a head part 60 described later is fitted into this cylinder 43 to constitute a discharge pump P. In the present embodiment, as shown in Figure 1, the main body 2 includes a bottom member 4, a container body 10, a sliding bottom 17, a holding member 20, a lid member 30, and a valve member 44. Among these structures, the bottom member 4, the container body 10, and the sliding bottom 17 will be briefly described first. In the illustrated example, the bottom member 4 is a wide-mouthed, bottomed cylindrical member, and is formed by erecting a tall inner peripheral cylinder 7 and a short outer peripheral cylinder 8 in a double cylindrical shape from the outer peripheral portion of a flat bottom wall 6. The container body 10 is held by the bottom member 4. In the illustrated example, the container body 10 has a straight cylindrical body portion 14 erected from the circumferential end of a disc-shaped lower wall portion 12 facing the bottom wall 6, and a leg portion 16 that is suspended from this body portion 14 via an outward-facing flange 15 is fitted onto the outer cylindrical portion 8. The body portion 14, the sliding bottom 17, and the lid member 30 define a storage chamber U for contents. A ventilation hole 13 is also opened in the lower wall portion 12. Furthermore, as shown in Figure 2(A), a vertical rib-shaped first anti-rotation projection I is attached to the outer surface of the body portion 14, positioned above the outward-facing flange 15, and engages with the first projection receiving portion J of the lower cylindrical portion 22, which will be described later. The sliding bottom 17 is a member that is movable upward and liquid-tightly fitted into the body portion 14, and has an annular sliding contact portion 19 attached around the partition wall portion 18 in the illustrated example, which is in contact with the body portion 14. However, these structures can be modified as needed.

[0018] The retaining member 20 is a member for holding the lid member 30 in the opening of the container body 10. As shown in Figure 2(A), the holding member 20 in the illustrated example has a thin-walled lower cylindrical portion 22 fitted to the outer surface of the body portion 14, from which a large-diameter, thick-walled upper cylindrical portion 24 protrudes upward, and a hanging cylinder 28 is suspended from the lower cylindrical portion 22 via a flange portion 27. This hanging cylinder 28 is formed to be approximately the same diameter as the leg cylinder 16 shown in Figure 1. Located below the flange portion 27, a vertical groove-shaped first projection receiving portion J is vertically provided on the inner surface of the lower cylindrical portion 22, which engages with the first anti-rotation projection I on the body portion 14 side. This prevents the retaining member 20 from rotating together with the overcap 98 due to frictional force between it and the overcap 98 during the screwing and unscrewing operation of the overcap 98. As shown in Figure 2(A), a pressure-contact step 23 is formed between the lower cylindrical portion 22 and the upper cylindrical portion 24, which is pressed against the large-diameter annular plate portion 33 of the lid plate 32, which will be described later. In this way, the large-diameter annular plate portion 33 is sandwiched between the pressure-contact step 23 and the upper end of the body portion 14, together with the packing y. This clamping force provides an anti-rotation effect for the lid member 30 relative to the body portion 14 and the holding member 20. Therefore, when the rotating member 80, which will be described later, is rotated, it is possible to prevent the lid member 30 from rotating together with the head portion 60 and the support member 47 in accordance with the rotating member 80. The outer surface of the upper cylindrical portion 24 is provided with a male threaded portion 25 for engaging with the female threaded portion 99 of the overcap, which will be described later. The upper cylindrical portion 24 stands upright along the large-diameter peripheral wall 40 of the lid member 30, which will be described later. A first folded-back piece 26 protrudes from the upper end of the upper cylindrical portion 24, which engages with the inner surface of the large-diameter peripheral wall 40. The large-diameter peripheral wall 40 in the illustrated example is provided with a locking rib 40a that bites into (locks with) the inner surface of the upper cylindrical portion 24.

[0019] The lid member 30 has a lid plate 32 that closes the upper end opening of the body portion 14, and an outlet 38 connected to the discharge pump P is provided in this lid plate 32. In this embodiment, as shown in Figure 2(A), a small-diameter peripheral wall 43, which is the cylinder of the discharge pump P, a medium-diameter peripheral wall 42 for mounting the support member 47 so that it cannot rotate, and a large-diameter peripheral wall 40 for assembling with the holding member 20 are concentrically erected from the upper surface O of the cover plate 32. As shown in Figure 2(A), the lid plate 32 in the illustrated example is formed to gradually decrease in height from the outside to the inside, from the upper large-diameter annular plate portion 33 through the middle medium-diameter annular plate portion 35 to the lower small-diameter annular plate portion 37. The inner circumference of the large-diameter annular plate portion 33 and the outer circumference of the middle-diameter annular plate portion 35 are connected by an upper connecting cylinder 34, and the inner circumference of the middle-diameter annular plate portion 35 and the outer circumference of the small-diameter annular plate portion 37 are connected by a lower connecting cylinder 36. An outlet 38 is located in the center of the small-diameter annular plate portion 37. A small-diameter peripheral wall 43, which is a cylinder, rises from the small-diameter annular plate portion 37, surrounding this outlet 38. A medium-diameter peripheral wall 42 is erected from the inner circumference of the middle-diameter annular plate portion 35, and a large-diameter peripheral wall 40 is erected from the large-diameter annular plate portion 33. A retaining groove c is provided around the upper part of the inner surface of the aforementioned medium-diameter peripheral wall 42 for fitting the locking end d of the support member 47, which will be described later. Furthermore, a vertical rib-shaped second anti-rotation projection K is provided vertically on the inner surface of the medium-diameter peripheral wall 42 for being supported by the second projection receiving portion L of the support member 47, which will be described later. However, these structures can be modified as needed.

[0020] In this embodiment, the valve member 44 is positioned above the small-diameter annular plate portion 37. The valve member 44 in the illustrated example consists of a frame portion 45 fitted to the lower end of the inner surface of the small-diameter peripheral wall 43, and a valve plate 46 supported by this frame portion via an elastic support piece. The valve plate 46 and the outlet 38 form the first check valve V1.

[0021] The support member 47 is a member for supporting the head portion 60 so that it can be raised and lowered but cannot be rotated. In this embodiment, the support member 47 is assembled between the small diameter peripheral wall 43 and the medium diameter peripheral wall 42. The support member 47 in the illustrated example has a ring plate 48 fitted between the small-diameter peripheral wall 43 and the medium-diameter peripheral wall 42, a cylindrical leg piece 50 projecting downward from the ring plate 48, a cylindrical upright piece 52 projecting upward from the ring plate 48, and a cylindrical second folded piece 54 that is locked from the upper end of the upright piece 52 to the inside of the small-diameter peripheral wall 43. The outer peripheral end of the ring plate 48 is a locking end d that fits into the retaining groove c of the medium diameter peripheral wall 42. The outer surface of the leg piece 50 is provided with a vertical groove-shaped second projection receiving portion L that receives the second anti-rotation projection K of the medium-diameter peripheral wall 42, and the outer surface of the upright piece 52 is provided with a vertical rib-shaped third anti-rotation projection M that is fitted into the third projection receiving portion N of the enclosing cylinder 64, which will be described later. These structures allow the support member 47 to be prevented from rotating relative to the lid member 30, and the head portion 60 to be prevented from rotating relative to the support member 47. The structure of the anti-rotation mechanism can be modified as appropriate, as long as it performs the same function. For example, a second anti-rotation projection K may be provided on the leg piece 50, and a second projection receiving portion L may be provided on the medium-diameter peripheral wall 42. Similarly, the arrangement of the third anti-rotation projection M and the third projection receiving portion N can also be swapped.

[0022] The operating member 58 is a member that is mounted to the main body 2 so as to be able to move up and down. The discharge pump P, which is operated by the moving up and down of the operating member 58, is formed between the main body 2 and the operating member 58. In this embodiment, the operating member 58 comprises a head portion 60, a piston guide 74, and a piston portion 78. However, these structures can be modified as appropriate.

[0023] The head portion 60 is supported above the main body 2 so as to be able to move up and down, and has a discharge port 62 for discharging the contents pressurized in the discharge pump P to the outside. In this invention, the raising process of the head portion 60 is achieved by manual operation of the rotating member 80 surrounding the head portion 60, instead of using a coil spring as in Patent Document 1. The rotational force applied to the rotating member 80 is smoothly converted into a lifting force for the head portion 60 by a conversion mechanism F formed between the rotating member 80 and the head portion 60. This conversion mechanism F consists of a cam groove G, described later, provided around one of the rotating member 80 and the head portion 60, and a sliding contact projection 68, described later, attached to the other. In this embodiment, the cam groove G is provided on the rotating member 80 and the sliding contact projection 68 is provided on the head portion 60, but it is also acceptable to provide the cam groove G on the head portion 60 and the sliding contact projection 68 on the rotating member 80. In this specification, "converting to lifting force" means that by rotating the rotating member, the rotational force of the rotating member can be converted into either a force that raises the head or a force that lowers the head. In this embodiment, a configuration is described in which upward and downward forces alternately appear by continuously rotating the head portion to one side in the circumferential direction, but the structure can be modified as appropriate. For example, a configuration in which an upward force appears when the rotating member is rotated to one side in the circumferential direction, and a downward force appears when it is rotated to the other side, is also within the technical scope of the present invention.

[0024] In this embodiment, the head portion 60 is a cylindrical member as shown in Figure 2(B), and a small-diameter boss cylinder 63, a surrounding cylinder 64 that encloses the boss cylinder 63, and an outer peripheral wall 65 connected to the circumferential end of the top wall 61 are concentrically suspended from the top wall 61, as shown in Figure 2(A). In the illustrated example, the top wall 61 is curved downward in a concave shape. Furthermore, a discharge port 62 is provided in the top wall 61, located inside the boss cylinder 63. A valve body 70 is fitted into this discharge port 62. In the illustrated example, the valve body 70 is formed by extending a valve stem 72 downwards from a valve plate 71 placed on the top wall 61. This valve stem 72 is inserted into the discharge port 62 so as to be able to move up and down but not be able to come out. The boss cylinder 63 is inserted inside the cylinder 43. A known piston guide 74 and piston portion 78 are attached to the boss cylinder 63. The piston guide 74 is formed by attaching a flange-shaped valve seat portion 77 to a bottomed mounting cylinder portion 75 that is fitted into the boss cylinder 63. The valve seat portion 77 and the piston portion 78 mounted around the mounting cylinder portion 75 form a second check valve V2. A fluid passage hole 76 is opened in the mounting cylinder portion 75. The upper end of the mounting cylinder portion 75 is in contact with a plurality of vertical protrusions w provided vertically on the inner surface of the boss cylinder 63. The surrounding tube 64 is vertically mounted on the outside of the support member 47. A suitable number (two in the illustrated example) of vertical groove-shaped third projection receiving portions N are vertically mounted on the inner surface of the surrounding tube 64. The outer peripheral wall 65 is inserted inside the large-diameter peripheral wall 40, maintaining a certain gap between them. A sliding contact projection 68 is attached to the outer peripheral surface Q of the outer peripheral wall 65 for sliding within the cam groove G. In a preferred embodiment, a plurality of sliding contact projections 68 are arranged around the outer peripheral wall 65 at appropriate angular intervals (e.g., 90°). In the illustrated example, two slits 67 are drilled upward from the lower end of the outer peripheral wall 65, and the peripheral wall portion between these slits 67 is formed into an elastic piece 66, and a sliding contact protrusion 68 is provided on the lower outer end side of this elastic piece 66. The two slits 67 are formed to be long enough to allow the elastic piece 66 to be elastically deformed radially in the head portion 60.

[0025] The rotating member 80 has a surrounding surface R that encloses the outer circumferential surface Q of the head portion 60, and is a cylindrical member that is rotatably mounted relative to the main body 2. In this embodiment, as shown in Figure 2(A), the rotating member 80 is clamped in a part of the holding member 20 (in the illustrated example, between the first folded piece 26 and the outer peripheral wall 65 of the head portion 60). This allows the rotating member 80 to rotate stably. The surrounding surface R is provided with a cam groove G, and is formed so that the sliding contact protrusion 68 of the head portion 60 can slide relative to the cam groove G by rotating the rotating member 80. The cam groove G is configured with a bottom dead center portion g2 and an upper dead center portion g4 positioned at appropriate locations in the circumferential direction. The sliding contact projection 68 of the head portion 60 moves between these dead centers, causing the head portion 60 to move up and down when the rotating member 80 is rotated. Figure 3(A) is a panoramic view of the circumferential surface R, which is the surrounding surface. However, for the sake of drawing convenience, only half of the surrounding surface R is depicted, not the entire circumference. As shown in Figure 3(A), the cam groove G includes a first inclined portion g1 that slopes diagonally downward toward one side X in the circumferential direction, a bottom dead center portion g2, a second inclined portion g3 that slopes diagonally upward, and a top dead center portion g4. These first inclined section g1, bottom dead center section g2, second inclined section g3, and top dead center section g4 correspond to one cycle of the discharge pump P. The first inclined section g1 is the section in which the sliding contact protrusion 68 moves from the top dead center g4 to the bottom dead center g2, and therefore corresponds to the discharge process of the discharge pump P. The second inclined section g3 is the section in which the sliding contact protrusion 68 moves from the bottom dead center g2 to the top dead center g4, and therefore corresponds to the suction process of the discharge pump P. In this specification, "dead point" refers to the state in which the piston portion 78 has reached the lower limit position or the upper limit position, and is not necessarily limited to a narrow range like a point. In the illustrated example, the bottom dead center g2 is a point-like area with an area approximately the same width as the diameter of the sliding contact projection 68, while the top dead center g4 is a long, band-shaped area. By providing a long top dead center g4, the system does not immediately transition to the discharge process of the second cycle after the completion of the suction process of the first cycle. Furthermore, because the top dead center portion g4 is long and strip-shaped, even if the sliding contact projection 68 is located within the top dead center portion g4 and the head portion 60 is accidentally pressed, the head portion 60 will not be pushed down. In the example above, the top dead center g4 is the portion of the discharge pump P's cycle where both the discharge and suction operations have finished. For the sake of explanation, this portion will be referred to as the cycle end portion Z.

[0026] In this embodiment, the cam groove G is formed such that the sliding contact projection 68 does not contact the inner surface (groove bottom surface in the illustrated example) H of the cam groove G at the end of the cycle Z, but the sliding contact projection 68 contacts the inner surface H of the cam groove G at locations other than the end of the cycle Z. Specifically, as shown in Figure 3(B), the top dead center portion g4, which is the end of the cycle Z, is formed to be Δh deeper than the rest of the cam groove G. The difference in groove depth Δh is designed to satisfy the following conditions. In the first inclined section g1, the bottom dead center section g2, and the second inclined section g3, the sliding contact protrusion 68 contacts the inner surface H of the cam groove G, causing the elastic piece 66 to deform inward. At the top dead center g4, the sliding contact projection 68 does not contact the inner surface of the cam groove G, and the elastic piece 66 does not deform. In this configuration, when the sliding contact protrusion 68 moves from the second inclined section g3 to the top dead center section g4, the user perceives a sudden decrease in the rotational resistance force of the rotating member 80, and thus understands that one cycle of the discharge pump has ended. Furthermore, when the elastic piece 66 is elastically deformed inward, a gap e is created between it and the surrounding surface R, as shown in Figure 2(A). When the head portion 60 is rotated, the sliding contact projection 68 moves from the second inclined portion g3 to the top dead center portion g4, and as the elastic piece 66 returns from its inwardly displaced position to its original position, it collides with the surrounding surface R, producing a collision sound, i.e., a clicking sound (for example, a "click" sound). This allows the user to understand that one cycle of the discharge pump has ended, not only through touch but also through hearing.

[0027] In this embodiment, the rotating member 80 is formed from two parts: a main cylinder 82 and a sub-cylinder 92. The main cylinder 82 has a thin-walled base half 90 above which a thicker tip half 84, with a larger outer diameter and inner diameter compared to the base half 90, is attached. On the outer surface of the main cylinder 82, a downward-facing engagement step 86 is formed between the front half 84 and the base half 90, which abuts against the upper surface of the retaining member 20. Inside the main cylinder 82, a downward-facing stepped portion 88 is formed between the front half 84 and the base half 90, which abuts against the upper surface of the retaining member 20. As shown in Figure 2(A), the sub-cylinder 92 consists of a fitting cylinder portion 94 that is fitted into the inner surface of the base half portion 90, and a locking projection 96 that protrudes outward from the lower end of the fitting cylinder portion and engages with the lower end surface of the base half portion 90. By engaging this locking projection 96 with the lower end surface of the base half 90, the insertion length t of the fitting cylindrical portion 94 into the inner surface of the base half 90 can be kept constant. Furthermore, as shown in Figure 2(A), this insertion length t is designed to be smaller than the length s of the base half 90 when viewed from the side. In this state, a cam groove G is formed between the tip portion 95 of the fitting cylinder portion 94 and the stepped portion 88. With this structure, the cam groove G can be formed simply by inserting the fitting cylinder portion 94 of the sub-cylinder 92 into the base half portion 90 of the main cylinder 82. Furthermore, when designing a rotating member 80 having a cam groove on its inner surface as a single component using synthetic resin, it is necessary to forcibly remove the portion of the mold corresponding to the cam groove, which imposes limitations such as not being able to increase the depth of the cam groove. However, the configuration of this embodiment does not have such drawbacks.

[0028] The overcap 98 is fitted onto a part of the main body 2 (the holding member 20 in the illustrated example) so as to cover the head portion 60 and the rotating member 80. In the illustrated example, the overcap 98 has an inner cylindrical portion 98b and an outer cylindrical portion 98c suspended from the outer circumference of the top plate 98a in a double cylindrical shape. The inner cylindrical portion 98b is provided with a female threaded portion 99 that engages with the male threaded portion 25 on the main body 2.

[0029] In the above configuration, when using the discharger of the present invention, the overcap 98 is removed from the state shown in Figure 1, the body portion 14 is grasped, and then the rotating member 80 is rotated in one direction in the circumferential direction. As a result, the head portion 60 cannot rotate relative to the main body 2 due to the rotation-preventing action of the second anti-rotation projection K and the second projection receiving portion L, as well as the third anti-rotation projection M and the third projection receiving portion N. Therefore, the sliding contact projection 68 of the head portion 60 slides relative to the cam groove G of the rotating member 80. As a result, when the sliding contact protrusion 68 moves within the first inclined portion g1 of the cam groove G, the head portion 60 descends. This increases the pressure inside the discharge pump P, causing the second check valve V2 to open, and the liquid inside the discharge pump P passes through the second check valve V2 and the valve body 70 and is discharged to the outside through the discharge port 62. When the sliding contact protrusion 68 moves within the second inclined portion g3 of the cam groove G, the head portion 60 rises, which creates negative pressure inside the discharge pump P, causing the second check valve V2 to close and the first check valve V1 to open, and the contents of the storage chamber to be sucked into the discharge pump P. When the sliding contact projection 68 moves from the second inclined section g3 to the top dead center section g4 due to the rotational operation of the rotating member 80, the frictional resistance is reduced, making it easy to see that the cycle has reached its end. Furthermore, when the sliding contact projection 68 moves from the second inclined section g3 to the top dead center section g4, the elastic piece 66 elastically returns to its original position, producing a clicking sound, which also indicates that the cycle has ended.

[0030] According to the above configuration and operation, a conversion mechanism F is formed between the rotating member 80 and the head portion 60 to convert the rotational force applied to the rotating member 80 into an upward and downward force applied to the head portion 60. As a result, a springless configuration can be realized, eliminating the problem of reduced durability due to deterioration of synthetic resin springs and the hassle of separating metal springs when disposing of them. When the sliding contact protrusion 68 enters the end of the cycle section Z of the cam groove G, the frictional resistance changes or a clicking sound is produced, making it easy to determine that one cycle of the discharge pump P has ended. [Explanation of symbols]

[0031] 2...Main body 4...Bottom member 6...Bottom wall 7...Inner cylinder 8...Outer cylinder 10...Container body 12...Bottom wall 13...Ventilation hole 14...Body 15...Outward flange 16...Leg cylinder 17...Sliding base 18...Bulkhead section 19...Annular sliding contact section 20...Holding member 22...Lower cylindrical section 23...Pressure contact step section 24...Upper cylindrical section 25...Male thread section 26...First folded piece 27...Flame part 28...Descent tube 30...Lid member 32...Lid plate 33...Large diameter annular plate section 34...Upper connecting cylinder 35...Medium diameter annular plate section 36...Lower connecting cylinder 37...Small diameter annular plate section 38...Outlet 40...Large diameter circumferential wall 40a...Locking rib 42...Medium diameter circumferential wall 43...Small diameter circumferential wall (cylinder) 44... Valve member 45... Frame 46... Valve plate 47...Support member 48...Ring plate 50...Leg piece 52...Upright piece 54...Second folding piece 58...Operating member 60...Head section 61...Top wall 62...Discharge port 63...Boss cylinder 64...Encircling tube 65...Outer wall 66...Elastic piece 67...Slit 68...Sliding contact protrusion 70... Valve body 71... Valve plate 72... Valve stem 74... Piston guide 75... Mounting cylinder 76... Fluid passage hole 77... Valve seat 78... Piston 80...Rotating member 82...Main cylinder 84...Front half 86...Engaging step 88...Stepped section 90... Base half part 91... Removal prevention rib 92... Sub cylinder body 94... Fitting cylinder part 95... Tip part 96…Latching protrusion 98...Overcap 98a...Top plate 98b...Inner cylinder 98c...Outer cylinder 99... Female thread section a... Retaining rib b... Rib receiving part c... Retaining groove d... Locking end e... Gap F...Conversion mechanism G...Cam groove g1...First inclined part g2...Bottom dead center part g3...Second inclined part g4...Top dead center H...Inner surface of cam groove Δh...Difference in depth I...First anti-rotation projection J...First projection receiving part K...Second anti-rotation projection L...Second projection receiving part M: Third anti-rotation projection N: Third projection receiving part о: Top surface P: Discharge pump Q: Outer surface R...Enclosing surface s...Length of the base half t...Insertion length of the fitting cylinder U...Storage chamber V1…First check valve V2…Second check valve w... longitudinal ridge X... one side y... packing Z... end of cycle

Claims

1. The main body (2) has a storage compartment (U) for contents built inside, and an opening (38) for removing the contents is on the top surface (O), A head portion (60) is supported above the main body (2) so as to be able to move up and down, and has an upward-opening discharge port (62), The head portion (60) has an enclosing surface (R) surrounding the outer circumferential surface (Q) and comprises a cylindrical rotating member (80) that is rotatably positioned relative to the main body (2), In a pump discharger in which a piston portion (78) equipped on the head portion (60) is fitted into a cylinder (43) erected around the outlet (38), A pump discharger is characterized in that a conversion mechanism (F) is formed between the rotating member (80) and the head portion (60) that converts the rotational force applied to the rotating member (80) into an upward or downward force applied to the head portion (60), and this conversion mechanism F) is provided around one of the surrounding surface (R) and the outer peripheral surface (Q) and comprises a cam groove (G) including a bottom dead center portion (g2) and an upper dead center portion (g4), and a sliding contact projection (68) attached to the other of the surrounding surface (R) and the outer peripheral surface (Q) that is slidable within the cam groove (G).

2. The pump discharger according to claim 1, characterized in that the cam groove (G) has a portion of the cam groove (G) that corresponds to one cycle of the discharge pump (P) designated as a cycle end section (Z), in which the sliding contact protrusion (68) does not contact the inner surface (H) of the cam groove (G), and in other areas, the sliding contact protrusion (68) contacts the inner surface (H) of the cam groove (G).

3. The cam groove (G) has a portion of its length corresponding to one cycle of the discharge pump (P) designated as the cycle end section (Z). The sliding contact protrusion (68) is attached to the outer surface portion of the elastic piece (66) which is formed as part of the outer peripheral wall (65) of the head portion (60) on the outer peripheral surface (Q). The elastic piece (66) is formed to be elastically deformable in the radial direction of the head portion (60), The pump discharger according to claim 1, characterized in that the rotation of the head portion (60) causes the sliding contact protrusion (68) to enter the cycle end portion (Z), thereby causing the elastic piece (66) to undergo elastic displacement and generate sound.

4. The rotating member (80) consists of a main cylindrical body (82) in which the base half (90) has a larger inner diameter via a stepped portion (88) relative to the front half (84), and a sub-cylindrical body (92) having a fitting cylindrical portion (94) that is fitted into the base half (90). The pump discharger according to any one of claims 1 to 3, characterized in that, when viewed from the side, the insertion length (t) of the fitting cylinder portion (94) is made smaller than the vertical length (s) of the base half portion (90), thereby defining the cam groove (G) between the tip portion (95) of the fitting cylinder portion (94) and the stepped portion (88) on the surrounding surface (R).

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