JP4974356B2 - Aerosol spray trigger head cap - Google Patents

Description

  The present invention relates to a trigger type head cap for an aerosol injector.

  As an aerosol ejector, a can type aerosol container containing a drug or the like inside is provided, and a trigger type head cap is mounted on the aerosol container.

  In this aerosol container, a gas is sealed inside, and contents such as a medicine are accommodated in a state where an internal pressure is applied by the gas. A stem is provided at the upper portion, and the stem is biased upward. When the stem is pushed down, the contents inside the aerosol container are ejected by the internal pressure.

  On the other hand, the trigger type head cap is provided with a cap cover that is attached to the upper part of the aerosol container, and the cap cover includes a stem fitting part that fits on the stem of the aerosol container and a spray port on the tip side. An L-shaped tube member having a connected flow path is provided. In addition, the cap cover is also provided with a trigger lever member that moves the tube member downward so that the stem fitting portion of the tube member can be pushed down.

  And in this trigger lever member, while forming the trigger part which becomes the shape where the front end was bent below, the back part was made into the 1st pivot part pivotally attached to a cap cover by a shaft, and also the abbreviation The intermediate part is a second pivot part pivotally attached to the pipe member by a pin provided on the side part of the pipe member (see, for example, Patent Document 1).

  With such a configuration, when the trigger portion of the trigger lever member is pulled, the trigger lever member rotates downward about the first pivot portion, and via the second pivot portion of the trigger lever member. The pipe member moves downward and pushes down the stem fitting portion in the pipe member. Thereby, the stem of the aerosol container is pushed down, the contents inside the aerosol container are ejected from the stem, and the ejected contents are ejected from the ejection port through the flow path of the tube member in the trigger type head cap. It has become.

Japanese Patent No. 3770439

  In the trigger type head cap of the conventional aerosol injector, when the trigger lever member is operated to inject the contents inside the aerosol container, the trigger lever member rotates around the first pivot portion. However, at this time, the second pivot part of the trigger lever member moves in an arc shape with the first pivot part as the center. For this reason, the tube member that is pivotally attached by the pin in the second pivotal portion is moved in an arc shape around the first pivotal portion of the trigger lever member. No longer moves straight down. As a result, the direction of the injection port on the distal end side of the tube member changes during injection, or the fitting of the stem fitting portion of the tube member with the stem of the aerosol container shifts, and the contents leak from here. There was a risk of such problems. In addition, there is a possibility that the tube member and the trigger lever member bite at the second pivoting portion of the trigger lever member, resulting in a problem that the movement here becomes worse.

  In view of these problems, the present invention provides a trigger type head cap for an aerosol injector that can move a pipe member straight downward when operating the trigger lever member to inject the contents inside the aerosol container. The issue is to provide.

The first invention is provided with a cap cover to be attached to the upper part of an aerosol container provided with a stem at the upper part, and an injection from the stem fitting part fitted to the stem of the aerosol container to the distal end side of the cap cover. An aerosol injector provided with a pipe member that has a flow path leading to the mouth, and a trigger lever member that moves the pipe member downward to enable the stem fitting portion of the pipe member to be pushed down. In the trigger type head cap, the trigger lever member is pivotally attached to the cap cover at the rear portion thereof, and is engaged with a protrusion provided on the side portion of the tube member at a substantially intermediate portion thereof so as to be slidable back and forth. an engaging portion for engagement provided, in this engagement portion, with a downwardly concave protrusions provided pawls become projecting portion of the lower engagement portion Ri dislodged which is a trigger type head cap for an aerosol injector was prevented by pawl.

  The second invention is the trigger head cap of the aerosol injector according to the first invention, wherein the trigger cover includes a vertical guide for moving the tube member straight in the vertical direction when the trigger lever member is rotated. It is.

  According to the present invention, the trigger lever member is pivotally attached to the cap cover at the rear portion so as to be pivotable up and down, and is engaged with the protrusion provided on the side portion of the pipe member at the substantially middle portion of the trigger lever member so as to be slidable back and forth. As a result, when the trigger lever member is operated to inject the contents inside the aerosol container, the tube member moves straight down even if the trigger lever member rotates downward. Thus, it is possible to eliminate the change in the direction of the injection port on the distal end side of the tube member. In addition, the fitting of the stem fitting portion of the pipe member with the stem of the aerosol container can be prevented from being displaced, and the problem that the contents leak out from here can be eliminated. Furthermore, the problem that the pipe member and the trigger lever member bite and the movement here becomes worse can be solved.

  An embodiment of a trigger type head cap of an aerosol injector according to the present invention will be described.

  First, as shown in FIG. 1, the aerosol injector 1 has a can-type aerosol container 2 as in the prior art, and a configuration in which a trigger type head cap is mounted on the aerosol container 2. In such cases, drugs such as insecticides, pest control agents, repellents, antibacterial and antifungal agents, cleaning agents, deodorants, fragrances, antiperspirants, etc., and contents such as paints And the contents such as a medicine are accommodated in a state where an internal pressure is applied by the gas. An upper portion of the aerosol container 2 is provided with a stem 3. The stem 3 is biased upward so that when it is pushed down, the contents inside the aerosol container 2 are ejected by internal pressure.

  Next, as shown in FIGS. 2 and 3, the trigger type head cap includes a cap cover 11 that is attached to the upper portion of the aerosol container 2. The cap cover 11 has a cylindrical shape in which the upper side is directed forward and backward, and has a substantially truncated cone shape in which the lower side is directed upward and downward. The cap cover 11 is provided with an L-shaped tube member 15 having a flow path 14 connected from the stem fitting portion 12 fitted to the stem 3 of the aerosol container 2 to the injection port 13 on the distal end side. A trigger lever member 16 that can be turned up and down to enable the stem fitting portion 12 of the pipe member 15 to be pushed down is provided facing forward and backward. The trigger lever member 16 has a trigger portion 17 whose front end is bent downward and has a hole 18 through which the pipe member 15 penetrates vertically in the middle.

  As shown in FIG. 4, the trigger lever member 16 is pivotally attached to the cap cover 11 so that the rear portion of the trigger lever member 16 can be turned up and down by a horizontal shaft 19. The protrusions 20 provided in the slidably engage with each other in a slidable manner.

  More specifically, the rear end, which is the rear portion of the trigger lever member 16, is provided with a horizontal shaft 19 that faces left and right, and the horizontal shaft 19 fits into a bearing 21 provided inside the cap cover 11. As a result, the trigger lever member 16 is pivotally attached to the cap cover 11 so as to be rotatable up and down around the horizontal axis 19. On the other hand, the left and right side surfaces of the pipe member 15 are provided with protrusions 20 on the left and right sides, respectively. And the engaging part 22 into which the projection body 20 of this pipe member 15 is inserted is provided in the approximate middle of the trigger lever member 16, and this engaging part 22 has a downwardly concave shape, and a part of the lower side is forward. A claw 23 that protrudes is provided. Then, the protrusion 20 of the tube member 15 is fitted into the engagement portion 22, and the upper portion of the protrusion 20 of the tube member 15 slides back and forth in the contact state along the upper surface of the engagement portion 22. The engaging portion 22 of the lever member 16 is slidably engaged with the protrusion 20 of the pipe member 15 in the front-rear direction. Note that the projections 20 of the fitted pipe member 15 are not easily detached from the engaging portion 22 by the claws 23 of the engaging portion 22 of the trigger lever member 16.

  Accordingly, as shown in FIG. 5, when the trigger portion 17 of the trigger lever member 16 is pulled, as shown in FIG. 6, the trigger lever member 16 rotates downward about the horizontal shaft 19 at the rear end, The substantially intermediate engaging portion 22 of the trigger lever member 16 also moves in an arc shape with the horizontal axis 19 as the center (indicated by a line A in FIG. 6). However, in the protrusion 20 of the tube member 15, the engaging portion 22 of the trigger lever member 16 slides back and forth with respect to the protrusion 20, so that the protrusion 20 does not move in an arc shape. Move straight down (indicated by line B in FIG. 6). As a result, the pipe member 15 is also moved straight downward. In short, even if the trigger portion 17 of the trigger lever member 16 is pulled and the trigger lever member 16 is rotated downward, the tube member 15 moves straight downward.

  The front portion of the cap cover 11 is provided with a guard body 24 that is positioned in front of the trigger portion 17 of the trigger lever member 16 so as to guard the trigger portion 17 of the trigger lever member 16. Yes.

  The cap cover 11 includes a cam-type egg-shaped rotary stopper 25 that presses the upper surface of the trigger lever member 16 and holds the stem fitting portion 12 of the tube member 15 in a depressed state. An operating lever 26 for operating the rotation of the rotary stopper 25 is provided on the side surface of the cap cover 11, and the residual gas can be discharged at the end of use (discarding) of the aerosol injector 1 by the rotary stopper 25. I am doing so.

  With this configuration, the trigger lever member 16 is rotated downward about the horizontal shaft 19 at the rear end by pulling the trigger portion 17 of the trigger lever member 16. Then, when the engaging portion 22 of the trigger lever member 16 slides back and forth with respect to the protrusion 20 of the tube member 15, the protrusion 20 of the tube member 15 moves straight downward, and the tube member 15 is also straight. Move down. Thereby, the stem fitting part 12 in the pipe member 15 is pushed down and the stem 3 of the aerosol container 2 is also pushed down, so that the contents inside the aerosol container 2 are ejected from the stem 3, and the ejected contents are the pipe member 15. It will be injected toward the front from the injection port 13 through this flow path 14.

  As described above, in the trigger lever member 16, the rear portion thereof is pivotally attached to the cap cover 11 so as to be vertically rotatable by the horizontal shaft 19, and the protrusions provided on both side surfaces of the tube member 15 at substantially the middle thereof. Since the body 20 is slidably engaged back and forth, when the trigger lever member 16 is operated to inject the contents inside the aerosol container 2, the trigger lever member 16 rotates downward. However, the pipe member 15 moves straight downward, thereby eliminating the change in the direction of the injection port 13 on the distal end side of the pipe member 15 and ensuring the target at the time of injection. The contents can be jetted. Further, the fitting of the stem 15 of the tube member 15 with the stem 3 of the aerosol container 2 can be prevented from shifting, and the content can be prevented from leaking from here. Can be increased. Furthermore, the problem that the pipe member 15 and the trigger lever member 16 that have occurred in the past bite and the movement here becomes worse can be solved.

  Further, as a modified example of the trigger type head cap of the aerosol injector of the above-described embodiment, as shown in FIG. 8, a vertical guide 27 for holding the pipe member 15 movably up and down is provided inside the cap cover 11. Anyway. The vertical guide 27 has a cylindrical shape, and the inner peripheral side holds the pipe member 15. The vertical guide 27 is not limited to a cylindrical shape, but is a substantially ring-shaped or semi-circular shape that is a semi-ring shape. Any shape may be used as long as it can guide the pipe member 15 such as a front and rear guide.

  As described above, since the vertical guide 27 that holds the pipe member 15 movably up and down is provided inside the cap cover 11, when the contents inside the aerosol container 2 are jetted, the trigger lever member 16 Even if the trigger portion 17 is pulled and the trigger lever member 16 is rotated, the tube member 15 can be surely moved straight in the vertical direction, and the direction of the injection port 13 in the tube member 15 is not changed. Thus, the contents can be injected to the target at the time of injection very reliably.

It is explanatory drawing of an aerosol injector. It is a perspective view of the trigger type head cap of an aerosol injector. It is sectional drawing of the trigger type head cap of an aerosol injector. It is a partial cross section explanatory view of the trigger type head cap of an aerosol sprayer. It is a partial cross section explanatory view of the trigger type head cap of an aerosol sprayer. It is a schematic explanatory drawing which shows the operation state of a trigger lever member and a pipe member. It is a partial cross section explanatory view of the modification in the trigger type head cap of an aerosol sprayer.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Aerosol injector, 2 ... Aerosol container, 3 ... Stem, 11 ... Cap cover, 12 ... Stem fitting part, 13 ... Injection port, 14 ... Flow path, 15 ... Pipe member, 16 ... Trigger lever member, 17 ... Trigger part, 18 ... hole, 19 ... horizontal axis, 20 ... projection, 21 ... bearing, 22 ... engaging part, 23 ... claw, 24 ... guard body, 25 ... rotary stopper, 26 ... operating lever, 27 ... Vertical guide

Claims (2)

A cap cover 11 that is to be attached to the upper portion of the aerosol container 2 provided with the stem 3 on the upper portion is provided, and the cap cover 11 is on the distal end side from the stem fitting portion 12 that is fitted to the stem 3 of the aerosol container 2. A trigger lever member 16 that includes a pipe member 15 having a flow path 14 that leads to the injection port 13 and that can move the pipe member 15 downward to push down the stem fitting portion 12 of the pipe member 15 is provided in the front-rear direction. In the trigger head cap of the aerosol sprayer
The trigger lever member 16 is pivotally attached to the cap cover 11 at its rear portion so as to be pivotable up and down, and is engaged with a protrusion 20 provided on a side portion of the tube member 15 so as to be slidable back and forth. An engaging portion 22 is provided. The engaging portion 22 has a downwardly concave shape, and is provided with a claw 23 that protrudes to a part of the lower portion thereof, so that the protrusion 20 is detached from the engaging portion 22. A trigger type head cap for an aerosol sprayer, characterized by being prevented by a claw 23 .   The trigger of the aerosol injector according to claim 1, wherein the cap cover (11) is provided with a vertical guide (27) for moving the pipe member (15) straightly when the trigger lever member (16) is rotated. Expression head cap.

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