JP4975560B2 - Shut-off nozzle - Google Patents

Description

  The present invention relates to a shut-off nozzle that is easy to pour out, has good liquid drainage, and is less likely to cause clogging.

The applicant of the present application already has a base part connected to the stem of the container, and the upper cylinder part standing from the base part fits slidably with the upper cylinder part of this joint, which serves as a passage for the contents passing through the stem. A lateral passage having a lower head and a pressure head passing through the lateral passage connected to the lower tubular portion and passing through the upper tubular portion to an ejection hole formed in front thereof, and a tip capable of sealing the ejection hole A shut pin that moves along the side wall, an elastic member that is interposed between the shut pin and the rear wall of the sideways passage to urge the shut pin forward to seal the discharge hole, and to contact the joint by depressing the pressing head Thus, a shut-off nozzle including a lever that opens the discharge hole by moving the shut pin rearward by the rocking accompanying the contact has been proposed (see, for example, Patent Document 1).
JP 2002-326044 A (FIG. 1 etc.)

  However, when the conventional shut-off nozzle is used as, for example, a nozzle of an aerosol container, if it is left for a long time after use, the liquid remaining in the nozzle may leak from the spout hole although it is a small amount.

  Therefore, as a result of testing and research on the conventional shut-off nozzle, the present inventor has come to recognize that such a liquid leak is an increase in internal pressure in a region from the nozzle to the stem.

  The present invention has been made on the basis of such fact recognition. The purpose of the present invention is to prevent liquid leakage even if it is left for a long time after use, even if liquid leakage occurs. An object of the present invention is to provide a novel shut-off nozzle capable of suppressing the amount of leakage to a very small amount.

  The present invention includes a joint having a base connected to the stem of the container, and an upper cylinder standing from the base serving as a passage for contents passing through the stem, and a lower cylinder slidably fitted to the upper cylinder of the joint A pressing head that passes the upper tube portion through a pour-out hole formed in the front through a horizontal passage that is connected to the lower tube portion, and a tip that can seal the pour hole along the horizontal passage And an elastic member interposed between the shut pin and the rear wall of the lateral passage to urge the shut pin forward to seal the discharge hole, and to contact the joint by pushing down the pressing head. In a shut-off nozzle having a lever that opens the discharge hole by moving the shut pin rearward by the swinging associated with the contact, the content is distributed to the base of the joint through the passage of the joint. A cylindrical member is provided, and an elastic member that urges the valve body toward the upper end opening of the cylindrical member is provided inside the cylindrical member, and the valve body seals the upper end opening and the joint. The check valve is arranged to prevent the communication of the pressure head, and a pressing portion is provided below the pressing head to allow the communication with the joint by pressing down the valve body as the pressing head is pressed down. .

  The cylindrical member according to the present invention may be configured to directly fix the stem or may be configured to be connected via a different member. Further, according to the present invention, it is preferable to form a space that expands as the internal pressure increases between the upper tube portion of the joint and the lower tube portion of the pressing head. Furthermore, the container according to the present invention can be an aerosol container.

  According to the shut-off nozzle of the present invention, a cylindrical member that allows the contents to flow through the joint passage is provided at the base of the joint, and the upper end opening of the cylindrical member is provided inside the cylindrical member. By arranging a check valve to prevent communication with the joint by sealing, the flow path leading from the stem through the cylindrical member to the outlet hole is not limited to the check valve unless the check valve is released. Furthermore, it is divided into a flow path from the stem to the check valve and a flow path from the check valve to the extraction hole.

  For this reason, even if the internal pressure rises in the flow path from the stem to the check valve, the increase in the internal pressure in the flow path does not affect the increase in the internal pressure of the flow path from the check valve to the extraction hole. In other words, the flow path to be examined in order to prevent liquid leakage accompanying the increase in internal pressure is not the entire flow path from the stem to the extraction hole, but only the flow path from the check valve to the extraction hole.

  That is, according to the shut-off nozzle of the present invention, it is possible to prevent the influence of the increase in internal pressure from the stem side. Therefore, according to the shut-off nozzle of the present invention, it is possible to provide a shut-off nozzle that hardly leaks liquid from the dispensing hole even if left for a long time after use.

  Furthermore, in the present invention, if a space is formed between the upper tube portion of the joint and the lower tube portion of the pressing head so as to expand as the internal pressure increases, the space is slid by sliding between the joint and the pressing head. Since the increase in internal pressure is suppressed by enlarging, the prevention of liquid leakage can be further ensured.

  Further, if an aerosol container is employed as the container according to the present invention, it is particularly effective for preventing liquid leakage.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  1 and 2 are longitudinal sectional views showing an initial state and a dispensing state of a shut-off nozzle 100 according to one embodiment of the present invention from the side.

  Reference numeral 110 denotes a joint having a base 111 connected to the stem S of the aerosol container. The base 111 constitutes a mounting cylinder connected to the stem S via a cylindrical member 170 described later, and an exterior cylinder 113 is integrally provided on the mounting cylinder 111 via an annular top wall 112.

  Further, the mounting cylinder 111 is integrally provided with an upper cylinder portion 114 that stands up from the mounting cylinder 111. The upper cylinder portion 114 is disposed coaxially with the mounting cylinder 111, and the inside thereof serves as a passage for the contents passing through the stem S.

  Reference numeral 120 denotes a pressing head disposed on the upper portion of the joint 110. Specifically, the pressing head 120 includes a head body 121 that accommodates the joint 110 so as to be movable up and down and is actually pressed by a user.

  The head main body 121 has a lower cylindrical portion 121a that is slidably fitted to the upper cylindrical portion 114 of the joint 110, and further inside, a hollow portion that is connected to the lower cylindrical portion 121a via the opening 121b and extends sideways. h is formed. The hollow portion h has a cylindrical shape with an opening at the front and a rear wall partitioned by a rear wall 121c.

  Since the front of the hollow portion h opens, the nozzle body 122 in which the extraction hole A is formed is attached. As a result, in the hollow portion h in the head main body 121, a lateral passage 121d connected to the lower cylinder portion 121a is formed between the nozzle main body 122 and the rear wall 121c. That is, the pressing head 120 passes the lower cylinder part 121a through the lateral passage 121d connected to the lower cylinder part 121a and into the extraction hole A.

  Reference numeral 130 denotes a substantially cylindrical shut pin having a tip 131 capable of sealing the pouring hole A and moving along the lateral passage 121d. In this embodiment, the shut pin 130 is integrally provided with a flange 132 on the outer peripheral surface thereof. Further, the tip 131 of the shut pin 130 is made of an elastic material that can be deformed and restored, and the sealing of the pouring hole A is ensured.

  Reference numeral 140 denotes a coil spring which is an elastic member interposed between the rear wall 121c of the lateral passage 121d and the flange 132 of the shut pin 130. The coil spring 140 urges the shut pin 130 forward via the flange 132, whereby the shut pin 130 seals the discharge hole A at the tip portion 131.

  Reference numeral 150 denotes a seating member attached to the rear wall 121c of the lateral passage 121d and having an opening 151 that slidably holds the shut pin 130. That is, the seating member 150 slidably holds the shut pin 130 and holds the coil spring 140 together with the rear wall 121c of the lateral passage 121d.

  Reference numeral 160 denotes a lever for opening the discharge hole A by moving the shut pin 130 rearward when the pressing head 120 is pushed down.

  More specifically, the lever 160 is a substantially L-shaped member having two end portions 161 and 162 and having an obtuse angle with each other, and the pin 160 is formed by a bearing member M attached to the lower portion of the head body 121. It is held so as to be able to swing through P.

  A notch 161 a is formed in one end (upper end) 161 of the lever 160. Accordingly, the lever 160 is coupled to the shut pin 130 by sandwiching the constricted portion 130c provided at the rear end of the shut pin 130 in the notch 161a.

  On the other hand, the other end (lower end) 162 of the lever 160 presses the top wall 112 while being in contact with the top wall 112 of the joint 110 when the pressing head 120 is pushed down, as shown in FIG. Thus, as the reaction force, the lever 150 is swung around the pin P so that the upper end portion 161 falls backward.

  Accordingly, as shown in FIG. 2, the lever 160 is brought into contact with the joint 110 by the depression of the pressing head 120, and the shut pin 130 is moved rearward by swinging associated with the contact, thereby opening the discharge hole A.

  Reference numeral 170 denotes a cylindrical member that allows the contents to flow to the mounting cylinder 111 of the joint 110 through the passage of the joint 110. The cylindrical member 170 has a passage 171 on the inner side thereof, and an upper end opening 171a of the passage 171 forms a diaphragm.

  Reference numeral 180 denotes a check valve that seals the upper end opening 171a of the cylindrical member 170 inside the cylindrical member 170 to prevent communication with the upper cylindrical portion 114 of the joint 110.

  The check valve 180 includes a valve body 181 that seals the upper end opening 171a, a coil spring 182 that is integrally connected to the valve body 181 and biases the valve body 181 toward the upper end opening 171a, and a coil spring And a seat 183 integrally connected to the lower end of 182.

  An annular rib 172 is integrally provided inside the cylindrical member 170, and the seat 183 of the check valve 180 is held by the rib 172. As a result, the valve body 181 is urged toward the upper end opening 171a by the coil spring 182 to seal the upper end opening 171a.

  On the other hand, reference numeral 123 denotes a pressing portion that penetrates the opening 121b of the head main body 121 and hangs down integrally from the head main body 121. Thereby, as shown in FIG. 2, the pressing portion 123 allows the valve body 181 to be pressed against the urging force of the coil spring 182 and to communicate with the upper tube portion 114 of the joint 110 as the pressing head 120 is pressed down. .

  That is, according to the shut-off nozzle 100 according to the present invention, the mounting member 111 of the joint 110 is provided with the cylindrical member 170 that allows the contents to flow through the passage of the joint 110, and the cylindrical member 170 is provided inside. Since the check valve 180 that seals the upper end opening 171a of the cylindrical member 170 and prevents communication with the upper cylinder portion 114 of the joint 110 is disposed, the stem S can be removed as long as the check valve 180 is not released. The flow path leading to the pouring hole A through the cylindrical member 170 includes a flow path from the stem S to the check valve 180 and a flow path from the check valve 180 to the pouring hole A with the check valve 180 as a boundary. And divided.

  For this reason, even if the internal pressure increases in the flow path from the stem S to the check valve 180, the increase in the internal pressure in the flow path affects the increase in the internal pressure of the flow path from the check valve 180 to the dispensing hole A. Does not affect. In other words, the flow path to be examined in order to prevent liquid leakage accompanying the increase in internal pressure is not the entire flow path from the stem S to the extraction hole A, but only the flow path from the check valve 180 to the extraction hole A. It becomes.

  That is, according to the shut-off nozzle 100 according to the present invention, it is possible to prevent the influence due to the increase in internal pressure from the stem S side. Therefore, according to the shut-off nozzle 100 according to the present invention, it is possible to provide a shut-off nozzle that is less likely to cause liquid leakage from the dispensing hole A even after being used for a long time after use.

  The check valve 180 according to this embodiment is configured by integrally configuring the valve body 181, the coil spring 182, and the seat portion 183, but each element is separately provided, or any one part is separately provided. It can also be configured. The coil spring 182 is not limited to a mechanical element such as a spring as long as it is an elastic member that urges the valve body 181 toward the upper end opening 171a, and may be an element made of an elastic material that can be deformed and restored. . That is, the check valve 180 according to the present invention has an elastic member 182 that biases the valve body 181 toward the upper end opening 171a, and the valve body 181 seals the upper end opening 171a to Any configuration may be used as long as it prevents communication.

  By the way, the shut-off nozzle is generally slidably fitted between the upper cylinder part 114 of the joint 110 and the lower cylinder part 121a of the pressing head 120 in order to ensure the function of swinging the lever 160. I am letting.

  On the other hand, as shown in FIG. 1, the shut-off nozzle 100 according to the present invention is in a position where the lower end 162 of the lever 160 does not contact the joint 110 even when the internal pressure of the nozzle 100 is increased. In other words, the interval X is a preliminary sliding amount for enlarging the space R formed therebetween as the internal pressure increases.

  That is, if a space R that expands as the internal pressure increases is formed between the upper cylinder portion 114 of the joint 110 and the lower cylinder portion 121a of the pressing head 120 as in the shut-off nozzle 100 according to the present invention. Since R is increased by sliding between the upper cylinder part 114 of the joint 110 and the lower cylinder part 121a of the pressing head 120, an increase in internal pressure is suppressed, so that the prevention of liquid leakage is further ensured. Can do.

  The above description shows the preferred embodiment of the present invention, but various design changes can be made according to the application. For example, the shut-off nozzle according to the present invention is particularly effective for preventing liquid leakage if an aerosol container is adopted as the container, as in the same form. However, the present invention is not limited to an aerosol container. The present invention can also be applied to a container including a pressure accumulating pump configured as follows.

FIG. 2 is a longitudinal sectional view showing an initial state of a shut-off nozzle 100 according to one embodiment of the present invention from the side. It is a longitudinal cross-sectional view which shows the extraction | pouring state of the form from the side.

Explanation of symbols

100 Shut-off nozzle
110 joints
111 Installation tube (base)
112 sky wall
113 Outer cylinder
114 Upper tube
120 pressure head
121 Head body
121a Lower cylinder
121b opening
121c rear wall
121d sideways passage
122 Nozzle body
123 Pressing part
130 Shut pin
131 Shut pin tip
130 Shut pin
130c Rear end of shut pin
140 Coil spring (elastic member)
150 Seating member
160 lever
161 Top
161a cutout
162 Bottom
170 Cylindrical member
171 Passage inside the cylindrical member
171a Upper end opening of cylindrical member
172 Cylindrical member ribs
180 Check valve
181 Disc
182 Coil spring
183 Seat A A Outlet C Aerosol container h Cavity P Swing support pin R A space formed between the upper cylinder part of the joint and the lower cylinder part of the pressing head S stem

Claims (3)

A joint that has a base connected to the stem of the container and the upper tube that stands up from the base serves as a passage for the contents passing through the stem;
A pressure head having a lower cylinder part slidably fitted to the upper cylinder part of the joint, and passing the upper cylinder part through an outlet hole formed in front thereof through a lateral passage connected to the lower cylinder part;
A shut pin that has a tip that can seal the dispensing hole and moves along a lateral passage;
An elastic member interposed between the shut pin and the rear wall of the lateral passage and energizing the shut pin forward to seal the discharge hole;
In a shut-off nozzle comprising a lever that contacts the joint by pressing down the pressing head and moves the shut pin backward by swinging with the contact to open the discharge hole,
The base of the joint is provided with a cylindrical member that allows the contents to flow through the joint passage,
A check valve that has an elastic member that urges the valve body toward the upper end opening of the cylindrical member inside the cylindrical member, and the valve body seals the upper end opening to prevent communication with the joint. And place
A shut-off nozzle, characterized in that a pressing portion is provided at a lower portion of the pressing head to allow communication with the joint by pressing down the valve body and pressing the valve body.   2. The shut-off nozzle according to claim 1, wherein a space that expands as the internal pressure increases is formed between the upper tube portion of the joint and the lower tube portion of the pressing head.   The shut-off nozzle according to claim 1 or 2, wherein the container is an aerosol container.

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