Dispenser with stopper

Abstract

To impart a structure serving as an energizing member of a pump mechanism to a stopper for preventing unintended pressing down of a pressing head, thereby eliminate the need for sorting when disposing, and impart (maintain) an energizing force to the energizing member over a long period of time.SOLUTION: A dispenser includes: a base cap 2 that is attached to a mouth neck part 11 of a container body 1; a pressure head 4 that drives a pump mechanism 3 suspended and held inside the mouth neck part 11 to dispense contents of the container body 1; and a stopper 5 that is removably attached between the base cap 2 and the pressure head 4 to regulate the pushing of the pressure head 4. The stopper 5 has: a regulating part body 51 that supports the pressing head 4 from below and regulates the pushing, while allowing the pushing of the pressing head 4 by being separated from between the base cap 2 and the pressure head 4; and an energizing part 52 that elastically supports the pressing head 4 from below even in the separated posture of the regulating part body 51.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dispenser having a pressure head for discharging liquid contents through a nozzle, and a stopper for restricting depression of the pressure head. [Background technology]

[0002] Conventionally, dispensers equipped with a press head have been widely used in containers that dispense liquid contents such as hand soap, shampoo, cosmetics, etc. (For example, Patent Document 1) The dispenser has a pump, and is configured such that by pressing the press head downward, a hollow stem is moved downward to drive the pump, and the contents in the container are sucked in, pressurized, and compressed, and then dispensed from a nozzle provided on the press head.

[0003] Furthermore, in such containers, the contents are easily ejected through the nozzle by pressing down on the pressure head, and therefore a stopper is known to prevent the pressure head from being pressed down unintentionally during distribution, handling, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-123927 A Summary of the Invention [Problem to be solved by the invention]

[0005] In a dispenser equipped with the above-mentioned pressing head, a biasing member made of a metal material such as a spring is generally housed in the cylinder of the pump to bias the hollow stem upward. When disposing of such a dispenser, it is necessary to separate the biasing member made of a metal material from other members made of synthetic resin material, but there is a problem in that it is difficult to remove the biasing member from the cylinder, which is very time-consuming.

[0006] For this reason, the use of synthetic resin materials instead of metal materials for the urging member has been considered in the past. However, urging members made of synthetic resin materials have low durability, and if the urging member is left compressed and deformed for a long period of time, particularly during distribution and storage of the dispenser, the urging member will become worn out in that shape, and the urging force of the urging member cannot be maintained.

[0007] Therefore, the present invention aims to provide a dispenser with a stopper that prevents the pressure head from being unintentionally pressed down, and that also functions as a spring member for the pump mechanism, thereby eliminating the need for separation at the time of disposal and enabling the application (maintaining) of a spring force to the spring member for a long period of time. [Means for solving the problem]

[0008] The dispenser of the present invention, which has been developed to achieve the above object, comprises: a base cap that is attached to the mouth and neck portion of a container body that contains the contents; a pressing head that drives a pump mechanism suspended inside the neck of the container by repeating a pressing operation to discharge the contents in the container body through a nozzle; a stopper that abuts against the pressing head from below and against the base cap from above to restrict the pressing of the pressing head, The stopper is characterized in that it has a regulating portion main body that can be removably fitted between the base cap and the pressing head, and supports the pressing head from below to regulate the pressing of the pressing head, while allowing the pressing of the pressing head by separating from between the base cap and the pressing head, and a biasing portion that elastically supports the pressing head from below in a position in which the regulating portion main body is separated from between the base cap and the pressing head.

[0009] In addition, in the dispenser with a stopper of the present invention, the regulating portion main body has an engagement portion on the side wall of the regulating portion main body, and the base cap or the head has a rotating engagement shaft that engages with the engagement portion and holds the regulating portion main body rotatably relative to the base cap or the pressing head.

[0010] In the dispenser with a stopper of the present invention, it is preferable that the biasing portion is cantilevered in a curved shape on the end edges of a pair of arms of the regulating portion main body, and the free end of the biasing portion comprises a spring piece that can abut against the pressure head.

[0011] In the dispenser with a stopper of the present invention, the spring piece is preferably an annular body having a double spring piece body with a window hole formed between the double spring piece bodies.

[0012] Furthermore, in the dispenser with a stopper of the present invention, it is preferable that the spring piece has a locking claw portion at the tip of the free end, and the pressing head has at least two cutout openings provided on a peripheral wall of the pressing head, through which the free ends of the spring piece can be slidably inserted inside the peripheral wall, and a descending step portion provided on the inside of the peripheral wall of the pressing head, which is linked to the locking claw portion and prevents the spring piece from coming off the pressing head. Effect of the Invention

[0013] According to the dispenser with a stopper of the present invention, a regulating body and a biasing part are provided on the stopper that regulates the pressing of the pressure head, and the biasing part is configured to elastically support the pressure head from below when the regulating body is in a position away from the lower side of the pressure head (a state in which the regulation of the pressing of the pressure head by the stopper is released). Therefore, when the pressure head is pressed down, the biasing part abuts against the lower end of the pressure head and compresses it, while releasing the pressing force exerts an upward biasing force to move the pressure head from the bottom dead center to the top dead center and maintain the position of the pressure head at the top dead center as it is. Therefore, it is no longer necessary to use a biasing member made of a metal material such as a spring that was previously built into the cylinder to apply a biasing force to the hollow stem, and the entire pump mechanism can be made of synthetic resin material, which eliminates the need for separation at the time of disposal.

[0014] Furthermore, according to the dispenser with a stopper of the present invention, the pressing head can be prevented from being pressed down by the restricting part of the stopper (by being positioned between the pressing head and the base cap), and the biasing part can be provided to elastically support the pressing head from below only when the contents are being dispensed. Therefore, there is no risk of the biasing part being compressed and deformed for a long period of time during distribution, storage, etc., and becoming worn out, and it is possible to prevent the biasing part from being elastically deformed and becoming difficult to restore when the dispenser is used.

[0015] Furthermore, according to the present invention, the spring portion is made of a curved spring piece, which shortens the stroke of the pressure head and allows the spring portion to easily elastically deform when it is brought into contact with the pressure head and pressed down, eliminating the risk of breakage, and allowing the spring portion to quickly return to its original shape when pressure on the pressure head is released.

[0016] Furthermore, according to the present invention, the spring piece constituting the urging portion is made into an annular body (annular spring), so that the annular body can be easily elastically deformed when the pressure head is pressed down, improving the urging force when the pressure is released and preventing the urging portion from becoming elastically deformed and difficult to restore (such as sagging due to deterioration over time), thereby improving durability.

[0017] Furthermore, according to the present invention, a locking claw portion is provided at the tip of the free end of the spring piece and held so as to be slidable along a cutout opening provided in the peripheral wall of the pressing head. This allows the cutout opening to act as a guide, allowing the pressing head to be pressed down smoothly and preventing the spring piece from shifting laterally and coming off the lower end position of the pressing head. [Brief description of the drawings]

[0018] [Figure 1] 1A to 1D are diagrams showing an embodiment of a dispenser with a stopper according to the present invention in a state in which the stopper is regulated from pressing down the pressure head, where (a) is a front view, (b) is a left side view, (c) is a rear view, and (d) is a cross-sectional view taken along the line AA in (a). [Diagram 2] 2A and 2B are diagrams showing an embodiment of the stopper-equipped dispenser of FIG. 1 in a state in which the pressing head can be depressed, in which (a) is a left side view showing the state before the content is dispensed, and (b) is a left side view showing the state during the dispensing of the content. [Diagram 3] FIG. 2 is a cross-sectional view showing the structure of the dispenser with a stopper in FIG. 1. [Figure 4] FIG. 11 is a side view showing another embodiment of a dispenser with a stopper according to the present invention, with the pressure head in a depressed state. [Diagram 5] 10A to 10D are diagrams showing another embodiment of a dispenser with a stopper according to the present invention in a state in which the stopper restricts the pressing of the pressure head, where (a) is a plan view, (b) is a front view, (c) is a right side view, and (d) is a rear view. [Figure 6]6A to 6D are diagrams showing the stopper of the stopper-equipped dispenser in FIG. 5, where (a) is a plan view, (b) is a front view, (c) is a right side view, and (d) is a rear view. [Figure 7] 6A and 6B are diagrams showing an embodiment of the stopper-equipped dispenser of FIG. 5 in a state in which the pressing head can be depressed, where (a) is a right side view showing the state before the content is dispensed and (b) is a right side view showing the state during the dispensing of the content. [Figure 8] 6A to 6C are diagrams illustrating a method for resetting the stopper in the dispenser with the stopper in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] An embodiment of the present invention will be described with reference to the drawings. In the following, a state in which the press head is restricted from being pressed down by the stopper will be referred to as a "restricted state," and a state in which the press head can be pressed down will be referred to as a "restricted state." Fig. 1 is a diagram showing an embodiment of a dispenser with a stopper according to the present invention in a restricted state, where (a) is a front view, (b) is a left side view, (c) is a rear view, and (d) is a cross-sectional view taken along the line AA in (a). Fig. 2 is a diagram showing an embodiment of the dispenser with a stopper in Fig. 1 in a derestricted state, where (a) is a left side view showing the state before the content is dispensed, and (b) is a left side view showing the state during the dispensing of the content. Fig. 3 is a diagram showing a cross-section of the structure of the dispenser with a stopper in Fig. 1. Fig. 4 is a side view showing another embodiment of a dispenser with a stopper according to the present invention in a state where the pressure head is pressed down.

[0020] In Figures 1 to 4, reference numeral 1 denotes a container body that contains the contents, reference numeral 2 denotes a base cap that is screwed onto the neck portion 11 of the container body 1, and reference numeral 3 denotes a pump mechanism that is inserted through the center of the base cap 2 and suspended inside the neck portion 11.

[0021] The container body 1 has a filling space for the contents inside, and a cylindrical neck part 11 is provided at the top. The container body 1 can be manufactured using a material such as a synthetic resin, but the material is not particularly limited. In this embodiment, the cylindrical container body 1 is shown as an example, but the shape of the container body can be appropriately changed based on the type of contents, the design of the container, the purpose, etc., and is not limited to the shape shown in the figure.

[0022] The base cap 2 has a female thread 21 on the inner peripheral wall, and is detachably attached by screwing into the male thread 12 provided on the outer peripheral wall of the mouth neck portion 11 of the container body 1, as well as by undercut fitting. A ring-shaped body 24 is integrally provided in the center of the top wall 23 of the base cap 2 so as to stand from the top wall 23. The ring-shaped body 24 may be formed separately from the base cap 2. The base cap 2 can be manufactured using a material such as a synthetic resin, but the material of the material is not particularly limited. In this embodiment, a cylindrical shape is shown as an example, but the shape is not limited to the shape shown in the figure.

[0023] The pump mechanism 3 is suspended inside the container body 1 through the neck portion 11, and is fixed to the base cap 2 by undercut fitting or the like. The pump mechanism 3 is driven via the hollow stem 3c by repeatedly pressing the pressing head 4, which will be described later, and the content contained in the container body 1 is sucked into the cylinder 3a via the suction tube 6, and is pressurized, compressed, and discharged from the nozzle 41 of the pressing head 4.

[0024] Reference numeral 4 denotes a pressing head that moves the hollow stem 3c up and down. The pressing head 4 has an inner cylinder 42 that fits on the lower surface of the upper end of the hollow stem 3c, i.e., the portion that protrudes from the upper portion of the base cap 2, and an outer cylinder 43 that is suspended so as to surround the inner cylinder 42. The contents that flow out through the feed path 3c3 of the hollow stem 3c can be discharged from a nozzle 41 through an internal passage 44 of the inner cylinder 42.

[0025] Reference numeral 5 denotes a stopper that is detachably disposed on the body portion of the annular body 24 of the base cap 2. The stopper 5 has a restricting portion main body 51 that is C-shaped in a plan view of the container body 1 and has a pair of arms 51a that can hold the body portion of the annular body 24 with elastic deformation as shown in Fig. 1, and a biasing portion 52 that is curved and cantilevered on the end edges of the pair of arms 51a.

[0026] As shown in Figure 1 (b), the upper end surface 5a of the regulating part main body 51 abuts against the lower end of the pressing head 4, and the lower end surface 5b abuts against the top wall 23 of the base cap 2, thereby regulating the downward pressing of the pressing head 4 and preventing the unintended discharge of the contents within the container during distribution or before the start of use.

[0027] In addition, the regulating portion main body 51 is arranged to be removably fitted into the annular body 24 between the base cap 2 and the pressing head 4, and may have any shape as long as it can abut against the pressing head 4 from below and abut against the base cap 2 from above to regulate the pressing head 4 from being pressed downward, and is not limited to the one shown in the figure.

[0028] The regulating portion main body 51 is configured so that, by being clamped to the body portion of the annular body 24 via the arm 51a as shown in FIG. 1, it is interposed between the lower end of the pressing head 4 and the top wall 23 of the base cap 2 and can regulate the pressing of the pressing head 4. On the other hand, it is configured so that, by being moved away from the body portion of the annular body 24 as shown in FIG. 2, the regulation of the pressing of the pressing head 4 can be released.

[0029] The restricting portion main body 51 has a pair of engaging portions 53 on the side walls, and the stopper 5 can be switched between a restricting state and a non-restricting state by rotating the restricting portion 51 via the engaging portions 53 as shown in Fig. 2. The engaging portions 53 may be slid, and the method of movement is not limited.

[0030] The engaging portion 53 has a recess 53a on the inner surface, and the recess 53a engages with a pair of rotating engagement shafts 25 protruding from the peripheral wall of the base cap 2 to rotatably hold the restricting portion main body 51 relative to the base cap 2. The rotating engagement shafts 25 may be provided so as to protrude from the pressing head 4, and the restricting portion main body 51 can be rotatably held relative to the pressing head 4 by engaging with the rotating engagement shafts 25. The rotating engagement shafts 25 may be provided on the engaging portion 53, and the recess 53a may be provided on the base cap 2 or the pressing head 4 to engage with both. In this way, the stopper 5 is engaged with the base cap 2 or the pressing head 4 via the engaging portion 53, so there is no risk of the stopper 5 being lost.

[0031] The urging portion 52 is made of a spring piece having a curved free end 52a having elasticity, which extends from the end edges of the pair of arms 51a. The urging portion 52 is configured such that the free end 52a abuts against the lower end of the pressing head 4 and elastically supports the pressing head 4 from below only in the unrestricted state shown in Fig. 2 in which the restricting portion main body 51 is rotated via the engaging portion 53 and separated from the body portion of the annular body 24. Therefore, in the restricted state shown in Fig. 1 in which the pressing down of the pressing head 4 is restricted during distribution, storage, etc., no load is applied to the urging portion 52, and the elastic deformation and restoring force of the urging portion 52 can be maintained for a long period of time.

[0032] 2(b), the urging portion 52 is compressed and deformed when the pressing head 4 is pressed down, and when the pressure on the pressing head 4 is released, the urging portion 52 returns to its original position due to the upward urging force (elastic restoring force) of the urging portion 52, and can push the pressing head 4 up from the bottom dead center to the top dead center, enabling reciprocating movement. The stopper 5 is preferably made of an elastic synthetic resin material, and the urging portion 52 and the regulating portion main body 51 may be formed integrally or separately, or only the urging portion 52 may be made of a material having high elasticity.

[0033] In this embodiment, the free ends 52a extending from the end edges of the pair of arms 51a are connected together to form a single unit, but the free ends 52a may remain separated into two. Also, the biasing portion 52 has a shape curved downward in the restricted state of Fig. 1, but may have any shape as long as it can abut against the lower end of the pressing head 4 and elastically support the pressing head 4 from below in the released state of Fig. 2.

[0034] Reference numeral 7 denotes a locking claw provided on the back surface of the base cap 2. When the restricting body 51 is in the separated position as shown in Fig. 2, the locking claw 7 is detachably fitted to the outer peripheral wall of the restricting body 51 by an undercut or the like, and the restricting body 51 can be maintained in the separated position, and the stopper 5 does not wobble when the contents are discharged, and does not interfere with the discharge. Reference numeral 8 denotes a knob provided on the back surface of the restricting body 51, and the restricting state can be switched between the restricted state and the unrestricted state by gripping the knob 8 with the fingers and moving the stopper 5.

[0035] In order to discharge the contents in the container body 1, as shown in Fig. 2(a), the restrictor body 51 is rotated about the engagement rotation shaft 25 as a fulcrum, and the pair of arms 51a of the restrictor body 51 are elastically deformed to separate from the annular body 24 (between the pressing head 4 and the base cap 2), and then the pressing head 4 is repeatedly pressed in as shown in Fig. 2(b). As a result, the pump mechanism 3 is driven via the hollow stem 3c as described above, and the contents in the container body 1 are discharged from the nozzle 41 of the pressing head 4.

[0036] The pump mechanism 3 is not particularly limited, but an example of the structure is shown in Fig. 3. The pump mechanism 3 can be one that is composed of a cylinder 3a that forms a space for sucking and pressurizing the contents, an annular piston 3b that is arranged inside the cylinder 3a and can slide up and down along the inner wall surface, a hollow stem 3c that moves the piston 3b up and down and whose upper part protrudes above the cylinder 3a and the base cap 2, a check valve (suction valve) 3e that is arranged inside the cylinder 3a and opens the suction port 3d only when the contents are sucked, and a piston guide 3f that is arranged inside the lower end of the hollow stem 3c and holds the piston 3b in the hollow stem 3c so as not to come off.

[0037] The check valve 3e is composed of a valve body 3e1 arranged in the suction port 3d and an elastic support 3e2 that supports the valve body 3e1, and the upper end surface of the elastic support 3e2 restricts the downward movement of the hollow stem 3c and the piston guide 3f. An opening is provided in the peripheral wall of the piston guide 3f to allow the flow of the contents sucked into the cylinder 3a.

[0038] The hollow stem 3c has a supply path 3c3 for distributing the pressurized and compressed contents in the cylinder 3a, and the piston 3b can be slid (moved up and down) in the cylinder 3a by moving the hollow stem 3c up and down. The piston 3b is formed in a double cylindrical shape consisting of an inner cylinder, an outer cylinder, and a connecting wall connecting the two, and the upper end of the inner cylinder slides on the inner surface of the sliding part 3c1 of the hollow stem 3c.

[0039] The piston guide 3f provided at the lower end of the hollow stem 3c can be one that fits into the lower end opening of the hollow stem 3c (not limited to the one shown in the figure, one that is connected to the hollow stem 3c may be used), and a seat 3f1 that can come into contact with the lower end of the piston 3b is formed on its upper surface. The hollow stem 3c has a sliding part 3c1 on its lower outer peripheral wall, the lower end of which can come into contact with the connecting wall of the piston 3b, and holds the piston 3b so that it can move up and down between the seat 3f1 of the piston guide 3f and the upper end of the sliding part 3c1, thereby forming a valve part on the outlet side of the cylinder.

[0040] In the deregulation state shown in FIG. 2, when the pressing head 4 is pressed down as shown in FIG. 2(b), the biasing portion 52 of the stopper 5 is compressed and deformed, and the hollow stem 3c of the pump mechanism 3 moves downward, and the piston 3b and the piston guide 3f slide downward. At this time, the check valve 3e is in a closed state, and the contents in the cylinder 3a are pressurized and compressed. Then, at the outlet side of the cylinder, with the lower end of the sliding portion 3c1 of the hollow stem 3c that has moved downward abutting against the connecting wall of the piston 3b, the opening 3c2 connecting the cylinder 3a and the feed path 3c3 of the hollow stem 3c communicates, and the contents in the cylinder 3a flow into the feed path 3c3 of the hollow stem 3c, pass through the internal passage 44 of the pressing head 4, and are discharged to the outside from the nozzle 41 of the pressing head 4.

[0041] On the other hand, when the pressing head 4 is released from the bottom dead center, the pressing head 4 returns to the top dead center by the elastic restoring force of the biasing part 52 of the stopper 5. At this time, the hollow stem 3c moves upward, the piston 3b and the piston guide 3f slide upward together with the hollow stem 3c, and the inner cylinder part of the piston 3b and the seat part 3f1 of the piston guide 3f engage (seal), blocking the communication between the cylinder 3a and the hollow stem 3c (feed path 3c3). As a result, the inside of the cylinder 3a becomes negative pressure, the valve body 3e1 of the check valve 3e is pushed up, the suction port 3d of the cylinder 3a is opened, and the contents in the container body 1 are sucked into the cylinder 3a through the suction tube 6.

[0042] 4 is a diagram showing another embodiment of a discharge container according to the present invention. In this embodiment, the biasing part 52 is compressed and deformed so that the pressing head 4 assumes a horizontal position when the pressing head 4 reaches the bottom dead center. This biasing part 52 can maintain the pressing head 4 in a horizontal position, and the pressing head 4 can be pressed in stably.

[0043] Fig. 5 is a diagram showing another embodiment of the stoppered dispenser according to the present invention in a state where the pressure head is restricted by the stopper, (a) being a plan view, (b) being a front view, (c) being a right side view, and (d) being a rear view. Fig. 6 is a diagram showing the stopper of the stoppered dispenser of Fig. 5, (a) being a plan view, (b) being a front view, (c) being a right side view, and (d) being a rear view. Fig. 7 is a diagram showing an embodiment of the stoppered dispenser of Fig. 5 in a state where the pressure head is released from restriction, (a) being a right side view showing the state before the content is dispensed, and (b) being a right side view showing the state during the content is dispensed. Note that the description of the same parts as in the previous embodiment will be omitted.

[0044] In this embodiment, a nozzle 41 is provided inside the pressing head 4, and a cutout opening 45 extending in the extension direction of the nozzle 41 is provided in the peripheral wall of the pressing head 4 at a position sandwiching the nozzle 41 in a plan view. On the inside of the peripheral wall where the cutout opening 45 is located, an inclined surface is formed whose upper end portion descends from the nozzle 41 side as shown by dotted lines in Figures 5 and 7, and a descending step 46 is provided at the dead end of the inclined surface.

[0045] The stopper 5 is composed of a restricting body 51 and a biasing part 52, and the restricting body 51 has a rear wall 51b and an engaging part 53 connected to the rear wall 51b and extending in the axial direction of the container body 1, as shown in FIG. 6. A pair of arms 51a, which are C-shaped in plan view and can hold the body part of the annular body 24 with elastic deformation, are protruded from the rear wall 51b. The biasing part 52 is composed of a pair of annular springs 52b, which are cantilevered at positions on the rear wall 51b that sandwich the arms 51a. The annular spring 52b, which is a spring piece, may be an annular body in which a spring piece body is arranged in two and a window hole 52e is formed between the two spring piece bodies, but the present invention is not limited to the illustrated one.

[0046] As shown in Figure 5, the upper end surface 51a1 of the pair of arms 51a abuts against the lower end of the pressing head 4 (outer tube 43), and the lower end surface 51a2 abuts against the top wall 23 of the base cap 2, thereby regulating the downward pressing of the pressing head 4 and preventing the unintended discharge of the contents in the container during distribution or before the start of use.

[0047] The regulating body 51 is clamped to the body portion of the annular body 24 via a pair of arms 51a, thereby being interposed between the lower end of the pressing head 4 and the top wall 23 of the base cap 2 and capable of regulating the pressing of the pressing head 4. On the other hand, as shown in FIG. 7, the regulating body 51 is configured to be able to release the restriction on the pressing of the pressing head 4 by moving it away from the body portion of the annular body 24.

[0048] The engaging portions 53 engage with a pair of rotating engagement shafts 25 protruding from the peripheral wall of the base cap 2 to rotatably hold the regulating portion main body 51 (stopper 5) relative to the base cap 2. The regulating portion main body 51 is rotated via the engaging portions 53 to switch the stopper 5 between a restricted state and a released state. The engaging portions 53 may be configured as openings (arc-shaped portions) that are mutually connected and each rotatably hold the rotating engagement shaft 25, and may be configured to be slidable relative to the rotating engagement shaft 25, and the method of movement is not limited.

[0049] It is preferable that the engagement portion 53 be two connected arc-shaped portions of the same diameter; however, in FIG. 6(c), the upper arc-shaped portion 53b1 can be made small in diameter and the lower arc-shaped portion 53b2 can be made large in diameter. In this way, when attaching the stopper 5 to the base cap 2, the large-diameter arc-shaped portion 53b2 can first be fitted into the rotating engagement shaft 25, and then the regulating portion main body 51 can be pushed down to engage the small-diameter arc-shaped portion 53b1 with the rotating engagement shaft 25, allowing the two to be easily and securely engaged.

[0050] The rotation engagement shaft 25 may be provided on the pressing head 4 , and the regulating portion main body 51 can be held rotatably relative to the pressing head 4 by engaging with the rotation engagement shaft 25 .

[0051] The biasing portion 52 is made of an elastic annular spring 52b having a doubly arranged spring piece body, which is supported at one end of the rear wall portion 51b at a position sandwiching the pair of arms 51a, and has a locking portion 52c protruding from its upper end (free end 52a). Also, a locking claw portion 52d is provided at the tip end (pointed end) of the locking portion 52c.

[0052] 7(a), when the regulating body 51 is rotated via the engaging portion 53, the upper end of the annular spring 52b and the locking portion 52c enter the cutout opening 45 provided in the peripheral wall of the pressing head 4 and slide along the cutout opening 45, and the locking claw portion 52d of the locking portion 52 engages with the downward step portion 46 provided in the cutout opening 45, thereby stopping the rotation of the regulating body 51. At this time, since the upper end of the cutout opening 45 is inclined downward as described above, the annular spring 52b and the locking portion 52c can smoothly enter (move).

[0053] 7(b), when the pressing head 4 is pressed down, the annular spring 52b is compressed and deformed, and the locking portion 52c and the annular spring 52b slide along the cutout opening 45 toward the discharge port side of the nozzle 41. At this time, the peripheral wall of the pressing head 4 in which the cutout opening 45 is formed performs a guide function for the biasing portion 52 (annular spring 52b), so that when the pressing head 4 is pressed down, the biasing portion 52 can be prevented from coming off the lower end position of the pressing head 4.

[0054] When the pressure on the pressing head 4 is released, the annular spring 52b returns to its original position due to the upward biasing force (elastic restoring force), and can push the pressing head 4 from the bottom dead center to the top dead center, enabling reciprocating movement. By using the annular spring 52b with a double spring piece body, it is possible to apply a stronger biasing force than a normal leaf spring, improving the biasing force when the pressure is released, and preventing the biasing part 52 from elastically deforming and becoming difficult to restore (sagging due to deterioration over time, etc.), thereby improving durability.

[0055] In addition, as shown in FIG. 7(b), the annular spring 52b is compressed and deformed so as to assume a horizontal posture when the pressing head 4 reaches the bottom dead center, so that the pressing head 4 can be maintained in a horizontal posture, enabling the pressing head 4 to be pressed in stably.

[0056] The urging portion 52 (annular spring 52b) is preferably made of an elastic synthetic resin material, and the urging portion 52 and the regulating portion main body 51 may be formed integrally or separately, or only the urging portion 52 may be made of a material having high elasticity. The urging portion 52 may be a spring piece having a curved shape as shown in Figures 1 to 4, and a locking claw portion 52d may be provided at the tip of the free end 52a of the spring piece.

[0057] Furthermore, by forming the engagement portion 53 in the form of arc-shaped portions 53b1, 53b2 which are connected to each other, when resetting the stopper 5, as shown in FIG. 8, the rotating engagement shaft 25 can be appropriately slid within the arc-shaped portions 53b1, 53b2, thereby making it possible to easily move the locking claw portion 52d away from the downward step portion 46, thereby enabling the stopper 5 to be smoothly reset. [Industrial Applicability]

[0058] The dispenser with a stopper of the present invention can be suitably used as a container for filling liquid, creamy, viscous or other foods and beverages, cosmetics, medicines, detergents, and the like. [Explanation of symbols]

[0059] 1 Container body 11 Mouth and neck 12 Male thread 2 Base Cap 21 Female thread 23 Ceiling Wall 24 Circular bodies 25 Rotating engagement shaft 3. Pump mechanism 3a Cylinder 3b Piston 3c hollow stem 3c1 Sliding part 3c2 aperture 3c3 Supply route 3d suction port 3e Check valve 3e1 Valve body 3e2 Elastic support part 3f Piston guide 4 Pressing head 41 Nozzle 42 Inner cylinder 43 Outer cylinder 44 Internal passage 45 Cutout opening 46 Downward step 5 Stopper 5a Upper end surface 5b Lower end surface 51 Regulatory body 51a Arm 51a1 Upper end surface 51a2 Lower end surface 51b Rear wall 52 Pressurizing section 52a free end 52b Annular spring 52c Locking part 52d Locking claw 52e Window hole 53 Engagement part 53a Recess 53b1, 53b2 Arc-shaped portion 6 Suction tube 7 Locking claw 8. Knob

Claims

1. a base cap attached to the neck of the container body that contains the contents; a pressing head that drives a pump mechanism suspended and held inside the neck portion by repeating a pressing operation, thereby discharging the contents in the container body through a nozzle; a stopper that contacts the pressing head from below and the base cap from above to restrict the pressing of the pressing head, a restricting portion main body that is removably fitted between the base cap and the pressure head, supports the pressure head from below to restrict pushing, and allows the pressure head to be pushed in by separating from the base cap and the pressure head; and a biasing portion that elastically supports the pressure head from below when the restricting portion main body is in a position separated from the base cap and the pressure head.

2. The stopper-equipped dispenser according to claim 1, characterized in that the regulating body has an engaging portion on the side wall of the regulating body, and the base cap or the head has a rotating engaging shaft that engages with the engaging portion to hold the regulating body rotatably relative to the base cap or the pressing head.

3. The dispenser with a stopper according to claim 1 or 2, characterized in that the biasing portion is cantilevered in a curved shape on the end edges of a pair of arms of the regulating portion main body, and its free end consists of a spring piece that can abut against the pressing head.

4. 4. The dispenser with a stopper according to claim 3, wherein the spring piece is an annular body having two spring piece bodies arranged therebetween and having a window hole formed therebetween.

5. The spring piece has a locking claw portion at the tip of the free end, The dispenser with a stopper according to claim 3, characterized in that the pressing head has at least two notched openings formed in the peripheral wall of the pressing head, through which the free ends of the spring pieces are slidably inserted inside the peripheral wall, and a descending step formed inside the peripheral wall of the pressing head, which is linked to the locking claw portion and prevents the spring pieces from separating from the pressing head.

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