JP2014196115A - Pump-type injection container - Google Patents

Abstract

Provided is a pump-type discharge container that prevents a liquid content from leaking from a discharge port of a nozzle body when an excessive load is applied to a nozzle body that is provided with a stopper so as not to be pushed down. Objective. In a pump-type discharge container 1, a liquid pump 6 includes a liquid cylinder 14 for sucking liquid and a liquid piston 15 that is fitted to the liquid cylinder 14 and descends by receiving a pressing force. 14 and an elastic member 8 that pushes up the liquid piston 15 and is disposed on the outer peripheral side of the liquid piston 15. In a state where load transmitting portions 12h and 15d for transmitting are provided and the stopper 4 is mounted so that the nozzle body 5 cannot be pushed down with respect to the cap 3, a clearance C1 opened in the vertical direction is formed in the load transmitting portions 12h and 15d. Is provided. [Selection] Figure 1

Description

  The present invention relates to a pump type that discharges the content liquid filled in the container from the discharge port of the nozzle body by repeatedly performing a push-down operation and a push-down release operation on the nozzle body protruding upward from the cap of the container. The present invention relates to a discharge container.

  With this type of pump-type discharge container, by pushing down the nozzle body that protrudes upward from the cap of the container, and releasing the depression, the piston body that penetrates the top plate portion of the cap and is connected to the nozzle body, The piston body moves up and down by a predetermined range against the spring force pressing the piston body upward. Inside the container, a cylinder body is provided below the mouth, and the piston body is inserted into the cylinder body. Therefore, by moving the piston body up and down, the liquid stored in the container is sucked up from the lower end of the cylinder body, passes through the hollow shaft center of the piston body and the nozzle body, and is discharged from the discharge port of the nozzle body. It is discharged outside. An example of such a pump-type discharge container is described in Patent Document 1.

  The structure of the foam jet pump container described in Patent Document 1 will be briefly described. The cylinder is formed in two stages of an air cylinder and a liquid cylinder, and the inside of both cylinders is an air tank by a piston pipe that moves up and down simultaneously. And a liquid tank. An air passage and a liquid introduction pipe are provided so that the two tanks join together in a mixing chamber formed in the upper part of the piston pipe. A liquid suction hole with a check valve that opens when the liquid tank is under negative pressure and a liquid suction pipe that reaches the bottom of the container are connected to the bottom of the liquid cylinder, and a liquid tank is added to the top of the liquid guide pipe. It has a discharge hole with a check valve that opens during pressure. In addition, the piston part in the air cylinder is provided with an air intake hole with a check valve that opens when the air tank is under negative pressure and communicates with the outside through the clearance of the piston pipe penetration part on the top surface of the lid. In the upper part of the cylinder, an outside air introduction hole is provided for communicating the outside and the inside of the container through a gap when the piston pipe descends. Further, a coil spring for raising the piston pipe in the air tank or the liquid tank is provided. This bubble ejection pump container is said to be capable of discharging uniform bubbles from the discharge nozzle to the outside of the container by moving the piston pipe up and down.

  Such a pump-type discharge container uses a stopper to fix the nozzle at the upper limit position for the purpose of preventing the liquid content from leaking from the nozzle during distribution and sales before the consumer starts use. There are things in state. However, when a pushing force is excessively applied to the nozzle fixed at the upper limit position, the content liquid stored in the container may leak from the nozzle outlet. An example of a discharge pump that takes such measures is described in Patent Document 2.

  Briefly explaining the structure of the discharge pump described in Patent Document 2, with respect to the cylinder suspended in the container from the mouth of the container, it is always biased upward by the spring force of the coil spring. A piston arranged so as to be movable up and down only within a predetermined range has a discharge port disposed outside the container through a cylindrical stem portion that penetrates the center of the top plate of the cap that is attached to the mouth of the container. It is connected with the nozzle which has. In addition, the check valve that opens and closes the outlet of the liquid chamber in the pump is always biased in the closing direction by the coil spring that biases the piston upward, and opens as the coil spring contracts as the piston descends. It is configured as follows. This discharge pump is configured such that the lower end of the coil spring that urges the piston and nozzle upward is movable slightly downward within a predetermined range while the nozzle is locked at the upper limit position. Yes. In this discharge pump, when the nozzle is locked at the upper limit position so that it cannot be pushed down, an excessive force is applied from above to lower the nozzle. The check valve that opens and closes the outlet of the liquid chamber in the pump can be prevented from immediately opening, and the liquid contained in the container is prevented from leaking out from the liquid chamber in the pump through the check valve. It can be done.

Japanese Utility Model Publication No. 3-007963 JP 2004-217283 A

  On the other hand, Patent Document 1 describes a pump container in which a coil spring is disposed in an air chamber. By disposing the coil spring in the air chamber, the content liquid and the coil spring do not come into contact with each other. However, in the pump container as described in Patent Document 2, the check valve in the upper part of the liquid chamber that is opened during pressurization is configured as a rod-shaped valve and is provided as a portion that receives the lower end of the coil spring. A rod-shaped valve is fitted into the stop body to restrict the upward movement of the rod-shaped valve. In such a pump container, when the coil spring is arranged in the air chamber, it is necessary to fix the cylindrical locking body to the bottom of the liquid cylinder, and therefore the cylindrical locking body cannot be moved. Thus, there is a problem that it is impossible to provide a function for preventing liquid leakage from the liquid chamber to the outside when the nozzle is locked. Further, in the conventional discharge pump described in Patent Document 2, when the nozzle is pulled up to the upper limit position while the liquid chamber is filled with the liquid, the portion that receives the lower end of the coil spring moves slightly upward. In this state, the check valve for opening and closing the inlet of the liquid chamber is closed, and the liquid chamber is sealed. In this state, in order to open the check valve that opens and closes the outlet of the liquid chamber and discharge the liquid, the portion that receives the lower end of the coil spring is moved downward to contact the bottom of the liquid chamber, and the coil spring is Need to shrink. However, since both the inlet and outlet check valves are closed and sealed in the liquid chamber, a considerable amount of force is required to move the portion receiving the lower end of the coil spring downward. There was a problem that it was difficult to discharge the liquid.

  The present invention has been made paying attention to the above technical problem, and even when the coil spring is disposed in the air chamber, the nozzle is mounted in a state where a stopper is mounted so that the nozzle body cannot be pushed down against the cap. It is an object of the present invention to provide a pump-type discharge container that prevents the content liquid from leaking to the outside from the discharge port of the nozzle body when an excessive load is applied to the body.

  In order to achieve the above object, according to the first aspect of the present invention, a nozzle body having a discharge port is attached to a cap attached to a mouth portion of a container so that the nozzle body can move up and down. In the pump-type discharge container in which a liquid pump for pushing liquid to the inside of the nozzle body and an air pump for pushing air to the inside of the nozzle body are provided inside the cap by reducing the product. The pump is for a liquid cylinder that sucks the liquid in the container by increasing the internal volume, and for the liquid that is fitted in the liquid cylinder and decreases by receiving a pressing force from the nozzle body. An elastic force is applied to the piston for the liquid so as to increase the internal volume, which is disposed on the outer peripheral side of the piston, the cylinder for the liquid and the piston for the liquid An elastic member that pushes up, and a load transmission portion that transmits the push-down force by abutting in the vertical direction to each other in a push-down force transmission path from the nozzle body to the liquid piston. In the state where the stopper is mounted so as not to be pushed down with respect to the cap, the load transmitting portion is provided with a clearance opened in the vertical direction.

  According to a second aspect of the present invention, in the first aspect of the invention, the air pump is fitted into the air cylinder for sucking air outside the container by increasing the internal volume, and the air cylinder. An air piston that reduces the internal volume of the air cylinder by being lowered by receiving a pressing force from the nozzle body, and the load transmitting portion abuts in the vertical direction of the nozzle body and the air piston. A pump-type discharge container that is a contact portion.

  Further, the invention according to claim 3 is the invention according to claim 1, wherein the air pump is fitted to the air cylinder for sucking air outside the container by increasing the internal volume, and the air cylinder. An air piston that reduces the internal volume of the air cylinder by being lowered by receiving a pressing force from the nozzle body, and the load transmitting portion is applied in the vertical direction of the air piston and the liquid piston. It is a pump type discharge container characterized by being a contact part which contacts.

  According to the present invention, the load transmitting portion for transmitting the push-down force by contacting each other in the vertical direction in the push-down force transmission path from the nozzle body to the liquid piston is provided, and the nozzle body cannot be pushed down with respect to the cap. Thus, in the state where the stopper is mounted, the load transmission portion is provided with a clearance opened in the vertical direction. When an excessive pressing force is applied to the nozzle body in a state where the stopper is mounted so that the nozzle body cannot be pressed down against the cap, the nozzle body is pressed down. On the other hand, since a clearance is provided in the pressing force transmission path from the nozzle body to the liquid piston, it is possible to prevent the pressing force transmitted to the nozzle body from being transmitted to the liquid piston. Therefore, in the state that the stopper is installed so that the nozzle body cannot be pushed down against the cap, when excessive push-down force is applied to the nozzle body, the content liquid is prevented from leaking from the discharge port of the nozzle body. can do.

  According to the present invention, when the lifting force is transmitted to the nozzle body, the nozzle body transmits the lifting force upward to the push-down force transmission path reaching the liquid piston via the air piston. On the other hand, since the clearance is provided in the pressing force transmission path from the nozzle body to the liquid piston, the liquid piston can be prevented from being pulled up. That is, the liquid piston is pulled upward, the liquid chamber of the liquid pump is sealed, and a large force is required to push down the nozzle body, so that it is possible to prevent the liquid from being difficult to be discharged. According to the present invention, since the clearance is provided in the push-down force transmission path to the liquid piston, the liquid piston cannot be pulled up even if the nozzle is pulled up to the upper limit position. Then, the elastic member contracts immediately and the liquid is pushed out into the nozzle body, so that the liquid chamber is not sealed and a large force is not required when the nozzle is pushed down.

It is sectional drawing which shows that the nozzle in the specific example of the pump type discharge container which concerns on this invention is being fixed to the upper limit position with the stopper. It is an enlarged view of the II section in FIG. It is sectional drawing which shows that the nozzle in the specific example of the pump type discharge container which concerns on this invention is a top dead center position. (A) is sectional drawing which shows that the nozzle in the specific example of the pump type discharge container which concerns on this invention is a bottom dead center position. (B) is sectional drawing which shows that the nozzle in the specific example of the pump type discharge container which concerns on this invention is urged | biased upwards by the elastic member from the bottom dead center position. It is sectional drawing which shows that the nozzle in the other specific example of the pump type discharge container which concerns on this invention is being fixed to the upper limit position with the stopper. It is an enlarged view of the VI section in FIG. It is sectional drawing which shows the other specific example of the inlet-side check valve which concerns on this invention.

  Next, the pump type discharge container according to the present invention will be described based on a specific example. First, the configuration will be described. The pump-type discharge container 1 is provided with a discharge pump 2 mounted on a container body (not shown) that stores liquid contents such as shampoo, face wash, hand soap, etc., and a push-down force is transmitted to the discharge pump 2. It is comprised so that the content liquid in a container main body may be discharged outside.

  As shown in FIG. 1, a cap 3 is detachably attached to a mouth portion (not shown) of the container body. The cap 3 is provided with an opening 3b at the center of the top plate 3a covering the mouth of the container. A cylindrical guide stem 3c is provided above the periphery of the opening 3b. A stopper 4 described later is detachably attached to the guide stem portion 3c, and a nozzle body 5 constituting the discharge pump 2 is provided above the opening 3b of the guide stem portion 3c.

  The discharge pump 2 includes a nozzle body 5 having a discharge port 5a, a liquid pump 6 that pushes liquid into the nozzle body 5 by receiving a pressing force from the nozzle body 5 and reducing the internal volume, and air is supplied to the nozzle body. 5, an air pump 7 that pushes out into the interior of the liquid 5, an elastic member 8 that urges the liquid pump 6 and the air pump 7, an outlet-side check valve 9 that prevents backflow of fluid, and an inlet-side check The valve 22 and the air chamber check valve 18 constitute a pump structure.

  The nozzle body 5 is applied with a load as a push-down head of the discharge pump 2, and is disposed in the opening 3b of the guide stem portion 3c so as to be pushed down. The nozzle body 5 includes a cylindrical inner cylinder portion 5c in which a vertical discharge path 5b communicating with a discharge port 5a opened in the horizontal direction is formed, and a concentric outer peripheral side of the inner cylinder portion 5c. And a cylindrical outer cylinder portion 5d formed integrally with each other. A guide stem portion 3c of the cap 3 is disposed between the inner cylinder portion 5c and the outer cylinder portion 5d in the radial direction thereof, and moves up and down along the axial direction of the guide stem portion 3c. Moreover, the inner cylinder part 5c is fitted with a net folder 10 which will be described later on its inner peripheral surface, and is fitted with a stem part 12 of an air piston 11 which will be described later on one end thereof. Accordingly, the nozzle body 5 moves up and down while being guided by the guide stem portion 3 c of the cap 3 together with the connected air piston 11. The inner cylinder portion and the outer cylinder portion of the nozzle body may be assembled as separate parts. Moreover, the outer cylinder part of a nozzle body does not need to be provided.

  The net folder 10 is provided with nets 10a at both ends thereof. When the pressing force is transmitted to the nozzle body 5 and the content liquid is discharged, the content liquid mixed with air passes through the net 10a of the net folder 10 arranged in the discharge path 5b, so that fine and uniform bubbles are obtained. Is discharged from the discharge port 5a.

  Further, the nozzle body 5 is always urged upward by an elastic member 8 described later in a state where the stopper 4 is not mounted. Then, the stopper 4 which is a separate part is detachably mounted between the outer cylinder portion 5d of the nozzle body 5 and the upper surface of the top plate portion 3a of the cap 3, so that the cap 3 cannot be pushed down. And an unlocked state that can be pushed down. Further, the position of the nozzle body 5 in the locked state is set as the upper limit position, and the nozzle body 5 once pushed down in the unlocked state moves upward by the elastic force of the elastic member 8 and stops and becomes the highest. The position is called the top dead center position.

  The air cylinder 13 and the liquid cylinder 14 are a double cylinder in which a large-diameter cylindrical air cylinder 13 and a small-diameter cylindrical liquid cylinder 14 are formed as one member by injection molding of a thermoplastic resin or the like. Cylinder. Further, an air piston 11 and a liquid piston 15 which are respectively molded as individual parts by injection molding of a thermoplastic resin or the like are arranged in the cylinders 13 and 14 so as to be movable up and down. The air piston 11 is arranged so as to slide along the inner wall surface 13 a of the air cylinder 13. The liquid piston 15 is arranged so as to slide along the inner wall surface 13 a of the liquid cylinder 14. The liquid piston 15 is always attached upward by the elastic force of the elastic member 8 disposed between the contact portion 15a formed on the outer periphery of the liquid piston 15 and an air chamber bottom surface 13c in the axial direction. It is energized. The air piston 11 is always urged upward by the elastic force of the elastic member 8 via the liquid piston 15.

  More specifically, the flange portion 13b formed at the opening end of the air cylinder 13 is sandwiched between the lower surface side of the top plate portion 3a of the cap 3 (in other words, inside the container body), The air cylinder 13 is integrally fixed to the cap 3 concentrically. That is, when the cap 3 is attached to the mouth portion of the container main body, the air cylinder 13 is placed in a state of being hung downward (in other words, inside the container) from the mouth portion of the container main body. Further, an air hole 13d for introducing air into the head space of the container main body (the space above the liquid level in the container) is provided in the upper part of the air cylinder 13.

  The air piston 11 includes a small-diameter cylindrical stem portion 12 connected to one end of the inner cylinder portion 5 c of the nozzle body 5 and a large-diameter cylindrical piston that slides on the inner wall surface 13 a of the air cylinder 13. It is integrally formed so that the part 11a may be connected via the intermediate connection part 11b. An air chamber 16 is formed in a space covered with the air piston 11 and the air cylinder 13 and outside the liquid piston 15 and the liquid cylinder 14.

  A predetermined width is provided at one end of the piston portion 11a so that sufficient airtightness can be secured between the piston portion 11a and the inner wall surface 13a of the air cylinder 13, and the piston portion 11a can slide vertically with respect to the inner wall surface 13a. The sliding seal portion 11c is integrally formed. The sliding seal portion 11c is in close contact with the inner wall surface 13a of the air cylinder 13 at both upper and lower ends in the width direction.

  A plurality of air suction holes 11 e for sucking air from the outside of the pump-type discharge container 1 are provided in the circumferential direction in the intermediate connecting portion 11 b of the air piston 11. In addition, an air chamber check valve 18 that prevents the air from flowing out from the air chamber 16 to the outside and prevents the air from flowing out from the mixing chamber 17 described later into the air chamber 16 at the intermediate connecting portion 11b. Is fitted. Further, as shown in FIG. 1, at the upper limit position, the peripheral edge of the opening 3b of the cap 3 and the intermediate connecting portion 11b of the air piston 11 are in contact with each other in the axial direction. Further, as shown in FIG. 3, in the unlocked state, the peripheral edge of the opening 3b of the cap 3 and the intermediate connecting portion 11b of the air piston 11 are spaced apart in the axial direction.

  As shown in FIGS. 1 and 2, the stem portion 12 of the air piston 11 regulates the lower limit position when the inner cylinder portion 5c of the nozzle body 5 is fitted to the outer peripheral side thereof, and the liquid is provided on the inner peripheral side. The upper portion 12a of the stem portion 12 is smaller in diameter than the lower portion 12b so as to regulate the upper limit position when inserting one end portion of the piston 15 for use. An annular ridge 12c is formed on the outer peripheral surface of the upper portion 12a of the stem portion 12 along the circumferential direction, and the ridge 12c extends along the inner peripheral surface of the inner cylinder portion 5c. It fits into the groove 5e formed as described above.

  On the inner peripheral surface of the upper portion 12a of the stem portion 12, as shown in FIG. 2, a fixed portion 12d for restricting movement in the axial direction by inserting one end portion of the net folder 10 inside, and a rod-like valve to be described later A locking rim portion 12e that restricts the rise of the valve body portion 19a of the body 19 and a flow hole 12f through which the content liquid mixed with air flows in the mixing chamber 17 are formed. A plurality of the locking rim portions 12e are radially formed with a constant interval in the circumferential direction of the stem portion 12. The space in which the locking rim portion 12 e is formed is a mixing chamber 17 that mixes the content liquid discharged by the liquid piston 15 and the air discharged by the air piston 11.

  As shown in FIG. 2, the lower end 12b of the stem portion 12 is in contact with the end portion 5f of the inner cylinder portion 5c of the nozzle body 5 in the axial direction and transmits a pushing force (first air piston load). (Transmission part) 12g is formed. Further, one end portion 15b of the liquid piston 15 is fitted to the inner peripheral surface of the lower portion 12b of the stem portion 12 so as to be movable in the axial direction. A plurality of grooves are formed on the inner peripheral surface of the lower portion 12b of the stem portion 12 and the upper end surface (second air piston load transmission portion) 12h that is in contact with the liquid piston 15 in the vertical direction and transmits the pressing force. The stem portion 12 is formed in a radial shape with a certain interval in the circumferential direction. The groove forms an air supply passage 20 for sending air from the air chamber 16 to the mixing chamber 17. A longitudinal groove (or rib) for forming an air supply passage between the inner peripheral surface of the stem portion and the outer peripheral surface of the liquid piston may be provided on the outer surface side of the liquid piston.

  Therefore, when the air piston 11 is at the top dead center position, as shown in FIG. 3, the sliding seal portion 11c closes the air hole 13d. Further, as shown in FIG. 4A, the air piston 11 is pushed down from the top dead center position to the bottom dead center position, and the sliding seal portion 11c of the piston portion 11a moves downward, whereby the air hole 13d. The air is supplied to the head space via the liquid chamber 21, the content liquid is supplied from the liquid chamber 21 described later to the mixing chamber 17, and the air is supplied from the air chamber 16 to the mixing chamber 17 via the air supply passage 20. In the mixing chamber 17, the content liquid and air are mixed. The mixed content liquid and air are discharged from the discharge port 5a through the discharge path 5b. Then, as shown in FIG. 4B, the pressing force is released and the liquid piston 15 is urged by the elastic member 8 to move upward from the bottom dead center position. Air is introduced into the air chamber 16 via

  Further, as shown in FIG. 1, the liquid cylinder 14 has a cylindrical shape and is integrally formed inside the air cylinder 13. In the liquid cylinder 14, one end portion 14 a into which the liquid piston 15 is inserted protrudes toward the opening side of the air cylinder 13 in the axial direction, and the other end portion 14 b protrudes from the bottom portion of the air cylinder 13 in the axial direction. It protrudes downward (in other words, inside the container).

  An inlet check valve 22 is press-fitted on the outer peripheral side of the other end 14 b of the liquid cylinder 14. The inlet-side check valve 22 has a valve seat portion 22a formed in a funnel shape, and a ball valve 22b is placed on the valve seat portion 22a. The valve seat 22a and the ball valve 22b are used to close the lower end inlet of the liquid chamber 21 when the liquid chamber 21 is positive and to open the lower end inlet of the liquid chamber 21 when the liquid chamber 21 is negative. An inlet-side check valve 22 is configured. The inlet side check valve 22 is connected to a liquid introduction pipe 23 for introducing the liquid content contained in the container body into the liquid cylinder. The lower end of the liquid conduit 23 extends to the vicinity of the bottom of the container body.

  In addition, a cylindrical tubular locking body 24 capable of passing liquid is integrally formed at the other end 14 b of the liquid cylinder 14. A plurality of longitudinal opening grooves 24a serving as liquid passages are formed on the side surface of the cylindrical locking body 24 in the circumferential direction, and a cylindrical portion 24b without grooves is formed above the opening groove 24a. Projections are formed on the inner peripheral surface of 24b. The protrusion is configured to prevent a locking portion 19b of a rod-shaped valve body 19 to be described later from coming off.

  As shown in FIGS. 1 and 2, the liquid piston 15 that slides in the axial direction on the inner peripheral surface of the liquid cylinder 14 has a substantially cylindrical shape, and has an inner diameter at the inner surface of one end portion 15b. A mortar-shaped (or funnel-shaped) valve seat portion 15c having a larger diameter toward the upper side is formed. Inside the liquid piston 15 and the liquid cylinder 14, a liquid chamber 21 into which the content liquid flows is formed.

  A contact portion 15 a that protrudes outward in the radial direction of the liquid piston 15 is formed on the outer peripheral surface of the liquid piston 15. A spring (elastic member) 8 compressed from the natural length is disposed between the lower surface of the abutting portion 15 a facing the air chamber bottom surface 13 c and the air chamber bottom surface 13 c of the air cylinder 13. The liquid piston 15 is always urged upward by the elastic force. Further, the spring 8 is configured to be compressed by the air chamber bottom surface 13c and the contact portion 15a when the liquid piston 15 and the liquid cylinder 14 are relatively close to each other by a pressing force. As shown in FIG. 4A, the lower limit position of the liquid piston 15 in the liquid cylinder is regulated by the contact portion 15a. In other words, the bottom dead center position is set by the contact between the contact portion 15 a and one end portion 14 a of the liquid cylinder 14.

  Further, as shown in FIG. 1, a rod-shaped valve element 19 is inserted inside the liquid piston 15 and the liquid cylinder 14. The rod-shaped valve body 19 has an inverted truncated cone-shaped valve body portion 19a formed at the upper end portion and a substantially triangular pyramid-shaped locking portion 19b formed at the lower end portion. The valve-side part 19a of the rod-shaped valve body 19 and the valve seat part 15c of the liquid piston 15 constitute an outlet-side check valve 9. As shown in FIG. 4A, the outlet side check valve 9 opens an outlet at the upper end of the liquid chamber 21 when the nozzle body is pushed down, and allows the content liquid from the liquid chamber 21 to the mixing chamber 17 to be opened. Allow supply. Further, as shown in FIG. 4B, the outlet-side check valve 9 releases the push-down of the nozzle body and opens the outlet at the upper end of the liquid chamber 21 when moving upward by the elastic force of the spring 8. The opening is closed and the flow between the mixing chamber 17 and the liquid chamber 21 is shut off. Further, the locking portion 19b of the rod-shaped valve body 19 is held by a cylindrical locking body 24 so as to be movable up and down by a predetermined range. And the latching | locking part 19b makes this position the upper limit position by hooking on the cylindrical latching body 24 and preventing the raise of the rod-shaped valve body 19. When assembling the liquid cylinder 14 and the liquid piston 15, the lower side of the rod-shaped valve body 19 is inserted into the cylindrical locking body 24. At that time, by applying a pressing force to the rod-shaped valve body 19 from above, the latching portion 19b of the rod-shaped valve body 19 is elastically deformed so that the protrusion at the upper end of the cylindrical locking body 19 is expanded. The stop portion 19b may be inserted into the cylindrical locking body 24.

  As shown in FIG. 1 and FIG. 2, the pump-type discharge container according to the present invention has a liquid piston from the nozzle body 5 in a state where the stopper 4 is mounted so that the nozzle body 5 cannot be pushed down against the cap 3. A clearance C1 is provided in the push-down force transmission path to 15. Specifically, in a locked state where the stopper 4 is attached between the outer cylinder portion 5d of the nozzle body 5 and the upper surface of the top plate portion 3a of the cap 3, the nozzle body 5 is dead due to the stopper 4. From the point position to the upper limit position, between the upper end surface 12h of the stem portion 12 of the air piston 11 and the end surface 15d of the end portion 15b of the liquid piston 15 (liquid piston load transmission portion) 15d, A clearance C1 is provided. In other words, the clearance C <b> 1 is provided in the push-down force transmission path from the air piston 11 to the liquid piston 15.

  Next, the operation of a specific example of the pump-type discharge container according to the present invention will be described. Locked state (in other words, the outlet side check valve 9 constituted by the valve body portion 19a of the rod-shaped valve body 19 and the valve seat portion 15c of the liquid piston 15 is closed, and the nozzle body 5 is fixed by the stopper 4. 1, a clearance C1 is provided between the upper end surface 12h of the stem portion 12 of the air piston 11 and the end surface 15d of the liquid piston 15 as shown in FIG. . When an excessive push-down force is applied to the nozzle body 5 in this locked state, the inner cylinder portion 5c of the nozzle body 5 transmits the push-down force to the boss portion 12g of the stem portion 12 of the air piston 11, and the nozzle body 5 The outer cylinder portion 5 d transmits a pressing force to the top plate portion 3 a of the cap 3 through the stopper 4. The top plate portion 3a to which the pressing force is transmitted transmits the pressing force to the intermediate connecting portion 11b of the air piston 11 that is in contact with the opening 3b. Then, the intermediate connecting portion 11b and the stem portion 12 to which the pressing force is transmitted are pressed down in the axial direction. On the other hand, since the clearance C1 is provided between the upper end surface 12h of the stem portion 12 and the end surface 15d of the liquid piston 15, the upper end surface 12h of the pressed stem portion 12 It is possible to prevent the pressing force from being transmitted to the liquid piston 15 without contacting the end surface 15d in the axial direction. That is, since the liquid piston 15 is not pushed down, the contents can be prevented from being discharged into the mixing chamber 17 from the inside of the liquid piston 15 and the liquid cylinder 14. Therefore, when an excessive pressing force is applied to the nozzle body 5 in a state where the stopper 4 is mounted so that the nozzle body 5 cannot be pressed down against the cap 3, the content liquid is discharged from the discharge port 5 a of the nozzle body 5. It is possible to prevent leakage to the outside.

  In addition, as shown in FIG. 3, in the unlocked state where the pressing force is not transmitted (in other words, the top dead center position of the nozzle body 5), the liquid piston 15 is biased upward by the spring 8 and is a rod-shaped valve. The body 19 is restricted to the upper limit position. Further, the upper end surface 12 h of the lower portion 12 b of the stem portion 12 of the air piston 11 is in contact with the end surface 15 d of the end portion b of the liquid piston 15 in the axial direction and is urged upward. At this time, the peripheral edge of the opening 3b of the cap 3 and the intermediate coupling portion 11b of the air piston 11 are separated in the axial direction.

  When the nozzle body 5 is lifted upward in this unlocked state, the nozzle body 5 transmits a lifting force upward to the air piston 11 connected to the inner cylinder portion 5c. The air piston 11 to which the lifting force has been transmitted is pulled up in the axial direction, with the position where the peripheral edge of the opening 3b of the cap 3 and the intermediate coupling portion 11b of the air piston 11 contact in the axial direction as the upper limit. On the other hand, the fitting portion between the stem portion 12 of the air piston 11 and the liquid piston 15 is relatively movable in the axial direction, and the upper limit position of the liquid piston 15 is limited by the rod-shaped valve body 19, It is possible to prevent the lifting force from being transmitted to the liquid piston 15. Therefore, the liquid piston can be prevented from being pulled upward from the top dead center position, the liquid chamber is filled and sealed with the content liquid, and a large force is required to push down the nozzle body. Thus, it is possible to prevent the liquid from being difficult to be discharged.

  Next, another specific example of the pump-type discharge container according to the present invention will be described. The configuration of the pump-type discharge container 25 is substantially the same as the configuration in the above-described specific example, and therefore the description thereof is omitted, and only the configuration relating to the nozzle body 26, the air piston 27, and the liquid piston 28 is described. explain.

  As shown in FIGS. 5 and 6, the air piston 27 includes a small-diameter cylindrical stem portion 29 connected to one end portion of the inner cylinder portion 26 a of the nozzle body 26, and an inner wall surface 13 a of the air cylinder 13. And a large-diameter cylindrical piston portion 27a that is slidably connected to each other via an intermediate connecting portion 27b. An air chamber 16 is formed in a space covered with the air piston 27 and the air cylinder 13 and outside the liquid piston 28 and the liquid cylinder 14.

  As shown in FIG. 6, the stem portion 29 of the air piston 27 regulates the lower limit position when the inner cylinder portion 26a of the nozzle body 26 is fitted to the outer peripheral side thereof, and the liquid piston 28 on the inner peripheral side. The upper portion 29a of the stem portion 29 is smaller in diameter than the lower portion 29b so as to restrict the upper limit position when the one end portion 28a is inserted.

  A plurality of grooves are radially formed on the inner peripheral surface and the upper end surface of the lower portion 29b of the stem portion 29 at regular intervals in the circumferential direction of the lower portion 29b. The groove forms an air supply passage 20 for sending air from the air chamber 16 to the mixing chamber 17. Further, a plurality of annular recesses 29c along the circumferential direction are formed in the axial direction on the inner peripheral surface of the lower portion 29b of the stem portion 29. An annular ridge 28b formed on the outer peripheral surface of the end 28a of the liquid piston 28 is fitted in the recess 29c. That is, the liquid piston 28 and the air piston 26 can move in the axial direction integrally. A longitudinal groove (or rib) for forming an air supply passage between the inner surface of the stem portion and the outer surface of the liquid piston may be provided on the outer surface side of the liquid piston.

  On the inner peripheral surface of the upper portion 29 a of the stem portion 29, a fixed portion 30 that inserts one end portion of the net folder 10 inward to restrict movement in the axial direction, and the valve body portion 19 a of the rod-shaped valve body 19 rises. And a flow hole 32 through which the content liquid mixed with air flows in the mixing chamber 17 is formed.

  A plurality of the locking rim portions 31 are radially formed with a certain interval in the circumferential direction of the stem portion 29. The space in which the locking rim portion 31 is formed is a mixing chamber 17 that mixes the content liquid discharged by the liquid piston 28 and the air discharged by the air piston 27.

  A fixing portion 30 is formed on the inner peripheral surface of the upper portion 29a of the stem portion 29. The fixing portion 30 is formed with a plurality of radial ribs at regular intervals in the circumferential direction of the stem portion 29. ing. The net folder 10 facing the fixed portion 30 is fitted to the inner peripheral side of the upper portion 29a of the stem portion 29 so as to be movable in the axial direction.

  Further, an annular protrusion 33 is formed on the outer peripheral surface of the upper portion 29a of the stem portion 29 so as to follow the circumferential direction thereof. The protrusion 33 is fitted in a groove 34 formed along the inner peripheral surface of the inner cylinder portion 5c so as to be movable in the axial direction.

  As shown in FIGS. 5 and 6, in the state where the stopper 4 is mounted so that the nozzle body 26 cannot be pushed down with respect to the cap 3, the clearance C <b> 2 enters the push-down force transmission path from the nozzle body 26 to the pistons 27 and 28. Is provided. Specifically, the boss portion of the lower portion 29b of the stem portion 29 in the locked state where the stopper 4 is attached between the outer cylinder portion 26b of the nozzle body 26 and the upper surface of the top plate portion 3a of the cap 3. A clearance C2 is provided between the first air piston load transmission portion 29d and the end portion (nozzle body load transmission portion) 26c of the inner cylinder portion 26a of the nozzle body 26. In other words, a clearance C <b> 2 is provided in the push-down force transmission path from the nozzle body 26 to one end 29 of the air piston 27. In addition, the fixed portion 30 is provided with a clearance C <b> 3 between the end of the net folder 10 and the axial direction in the locked state. And the clearance C2 between the lower part 29b of the stem part 29 and the edge part of the inner cylinder part 26a of the nozzle body 26, and the clearance C3 between the fixing | fixed part 30 and the net folder 10 are the lengths of the axial direction. Are configured to be equal.

  Next, the operation of another specific example of the pump type discharge container according to the present invention will be described. Other specific examples of the pump-type discharge container according to the present invention can obtain the same effects as the specific examples described above. In particular, in the locked state, as shown in FIG. 5, a clearance C <b> 2 is provided between the lower portion 29 b of the stem portion 29 and the axial direction of the inner cylinder portion 26 c of the nozzle body 26. When an excessive pressing force is applied to the nozzle body 26 in this locked state, the inner cylinder portion 26a of the nozzle body 26 is pressed down, and the outer cylinder portion 26b of the nozzle body 26 is connected to the top plate portion of the cap 3 via the stopper 4. The pressing force is transmitted to 3a. And the top-plate part 3a to which pushing-down force was transmitted is pushed down to an axial direction. On the other hand, since the top plate portion 3a of the cap 3 and the intermediate connection portion 27b of the air piston 27 are separated from each other in the axial direction, no pressing force is transmitted to the intermediate connection portion 27b of the air piston 27. In addition, since a clearance C2 is provided between the lower portion 29b of the stem portion 29 and the inner cylinder portion 26c of the nozzle body 26, the end portion of the inner cylinder portion 26c of the pushed-down nozzle body 26 is a stem. It is possible to prevent the push-down force from being transmitted to the air piston 27 without contacting the lower portion 29b of the portion 29 in the axial direction. That is, since the air piston 27 is not pushed down, the contents can be prevented from being discharged from the air piston 27 and the liquid piston 28 into the mixing chamber 17. Therefore, when excessive pressure is applied to the nozzle body while a stopper is attached to prevent the nozzle body from being pushed down against the cap, the liquid content is prevented from leaking from the nozzle outlet. can do.

  The pump-type discharge container according to the present invention may be configured to prevent the liquid content from leaking from the discharge port of the nozzle body when an excessive load is applied to the fixed nozzle body. May be ejected in the form of a mist, or may be ejected as it is.

  Also, the inlet side check valve according to the present invention may be formed integrally with the liquid cylinder, and if the cylindrical locking body is fixed to the bottom of the liquid cylinder, it is separate from the liquid cylinder. May be formed. For example, as shown in FIG. 7, a funnel-shaped valve seat portion 35 may be formed at the end of the liquid cylinder 36, and a ball valve 37 may be placed on the valve seat portion 35. The valve seat 35 and the ball valve 37 close the inlet 38a at the lower end of the liquid chamber 38 when the liquid chamber 38 is positive, and the inlet for opening the inlet 38a of the liquid chamber when the liquid chamber 38 is negative. A side check valve 39 is configured. Further, the cylindrical locking body 40 is disposed as a separate body at the inner lower portion of the liquid cylinder 36, and is fixed to the bottom of the liquid cylinder 36 by any means such as adhesion or fitting, and the cylindrical locking body. An annular receiving portion 40 a is formed at the lower end of 40. Further, the cylindrical locking body 40 has a plurality of longitudinal opening grooves 40b in the circumferential direction that form liquid passages on the side surfaces thereof, and a cylindrical portion 40c without grooves is formed above the opening grooves 40b. A protrusion 40d is formed on the inner peripheral surface of the cylindrical portion 40c. The protrusion 40d is configured to prevent the locking portion 41a of the rod-shaped valve body 41 from coming off.

  DESCRIPTION OF SYMBOLS 1 ... Pump type discharge container, 2 ... Discharge pump body, 3 ... Cap, 4 ... Stopper, 5 ... Nozzle body, 5f ... End part (nozzle body load transmission part) of nozzle body, 6 ... Pump for liquid, 7 ... Air 8 ... Elastic member, 11 ... Air piston, 12g ... Boss part (first air piston load transmission part), 12h ... Upper end surface (second air piston load transmission part), 13 ... Air cylinder, DESCRIPTION OF SYMBOLS 14 ... Liquid cylinder, 15 ... Liquid piston, 15d ... End surface (Liquid piston load transmission part), 21 ... Liquid chamber, C1 ... Clearance.

Claims (3)

A nozzle body having a discharge port is attached to a cap attached to the mouth portion of the container so that the nozzle body can move up and down, and receives a push-down force from the nozzle body to reduce the internal volume, thereby pushing the liquid into the nozzle body. In the pump-type discharge container in which the pump for air and the air pump for pushing air into the nozzle body are provided inside the cap,
The liquid pump includes a liquid cylinder that sucks the liquid in the container by an increase in the internal volume, and the liquid pump that is fitted to the liquid cylinder and descends by receiving a pressing force from the nozzle body. A liquid piston to be reduced, and an elastic member that is disposed on an outer peripheral side of the liquid cylinder and the liquid piston and pushes up the liquid piston with an elastic force so as to increase the internal volume,
A load transmitting portion for transmitting the pressing force by contacting each other in a vertical direction in a pressing force transmission path from the nozzle body to the liquid piston;
In a state where a stopper is mounted so that the nozzle body cannot be pushed down with respect to the cap, a clearance opened in the vertical direction is provided in the load transmitting portion. The air pump includes an air cylinder that sucks air outside the container by increasing the internal volume, and the air cylinder that is fitted to the air cylinder and descends by receiving a pressing force from the nozzle body. An air piston that reduces the internal volume of
The pump-type discharge container according to claim 1, wherein the load transmitting portion is a contact portion that contacts the nozzle body and the air piston in a vertical direction. The air pump includes an air cylinder that sucks air outside the container by increasing the internal volume, and the air cylinder that is fitted to the air cylinder and descends by receiving a pressing force from the nozzle body. An air piston that reduces the internal volume of
2. The pump-type discharge container according to claim 1, wherein the load transmitting portion is a contact portion that contacts the air piston and the liquid piston in a vertical direction.

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