JP5075599B2 - Pressing head - Google Patents

Description

  The present invention relates to a pressing head that is mounted on a discharger in which a stem is erected so that it can be pushed in an upward biased state.

As this type of pressing head, for example, as shown in the following Patent Document 1, a top wall portion, a peripheral wall portion extending downward from an outer peripheral edge portion of the top wall portion, and a nozzle hole are provided, and an internal A head body in which a valve chamber that communicates with the inside of the stem of the discharger and communicates with the outside through a nozzle hole is defined, and a ceiling wall portion, which extends downward from the bottom surface of the ceiling wall portion. A mounting cylinder fitted with a stem, and a mounting cylinder member including a guide cylinder having a diameter larger than that of the mounting cylinder and extending in the vertical direction on the outer peripheral edge of the top wall. It has been known.
The mounting cylinder member has a lower end edge of the guide cylinder supported from the lower side by the annular projection between an annular projection and a valve chamber projecting on the inner peripheral surface of the peripheral wall inside the head body. In addition, the guide tube is disposed so as to be slidable relative to the head body.
The valve chamber is provided with a valve member that closes the nozzle hole in a forward biased state. The rear end portion of the valve member is bent forward as it goes downward, and the lower end portion thereof is disposed on the top wall portion, and the valve member is moved backward when the head body is pressed against the mounting cylinder member. The lever member supported so as to be swingable is connected.
JP 2002-326044 A

However, in the conventional pressing head, for example, when an external force is applied to the head body, the head body moves upward with respect to the mounting cylinder member, and the annular protrusion of the head body deforms the guide cylinder while reducing its diameter. There is a possibility that the head main body may come off the mounting cylinder member over the lower end edge of the guide cylinder and the mounting cylinder member remains on the stem.
As a means for solving such a problem, it is conceivable to increase the protruding amount of the annular protrusion provided on the peripheral wall portion of the head main body in the radially inward direction, but the head main body is injection-molded. In this case, if the mold structure is not complicated, it is difficult to remove the molded head body, which increases the manufacturing cost of the pressing head.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a pressing head that can suppress the head main body from coming off the mounting cylinder member without increasing the manufacturing cost. .

In order to solve the above-described problems and achieve such an object, the pressing head of the present invention is a pressing head that is mounted on a discharger having a stem upright so as to be able to be pressed in an upward biased state. , A peripheral wall portion extending downward from the outer peripheral edge portion of the top wall portion, and a nozzle hole, and a valve chamber that communicates with the inside of the stem and communicates with the outside through the nozzle hole. A head body, a ceiling wall, a mounting cylinder that extends downward from the lower surface of the ceiling wall and is connected to the stem, and has a larger diameter than the mounting cylinder and the ceiling wall. A mounting cylinder member provided with a guide cylinder extending in the vertical direction at the outer peripheral edge, and the mounting cylinder member is formed in an annular shape projecting from the inner peripheral surface of the peripheral wall portion inside the head body. Between the projection and the valve chamber, the lower end edge of the guide tube is formed by the annular projection. The guide tube is supported by being fitted to the head body so as to be slidable relative to the head body, and the valve chamber is provided with a valve member for closing the nozzle hole in a forward biased state. The lower end of the valve member is bent forward as it goes downward, and its lower end is disposed on the top wall, and when the head body is pressed against the mounting cylinder member, the valve member is A lever member that is swingably supported so as to be moved backward is connected, and a regulating ring that regulates deformation of the guide cylinder inward in the radial direction is fitted into the guide cylinder of the mounting cylinder member. It is characterized by.
In this invention, since the regulating ring is provided, when an external force or the like acts on the head body, the head body is moved upward with respect to the mounting cylinder member so that the annular protrusion gets over the lower end edge of the guide cylinder. However, since the reduced diameter deformation of the guide tube is restricted, it is possible to suppress the head body from being detached from the mounting tube member.
In addition, since it is sufficient to provide a regulating ring in order to achieve such effects, it is possible to apply the current mold almost as it is when the mounting cylinder member is injection-molded. The increase can also be suppressed.

Here, a flange portion may protrude from the inner peripheral surface of the restriction ring toward the radially inner side.
In this case, since the flange portion projects from the inner peripheral surface of the regulating ring toward the radially inner side, it is possible to further increase the resistance force to the diameter reduction deformation applied to the guide tube. Further, when the radially inner end of the flange portion is brought into contact with the outer peripheral surface of the mounting cylinder in the mounting cylinder member, the diameter reduction deformation of the guide cylinder can be reliably prevented.

Moreover, a cylindrical adapter may be provided between the stem and the mounting cylinder, and the restriction ring may be formed integrally with the adapter.
In this case, since the adapter is provided, it is possible to increase the types of containers to which the pressing head can be applied. Further, since the regulation ring is formed integrally with the adapter, An increase in manufacturing cost can be suppressed by suppressing the number of parts.

  According to the pressing head according to the present invention, the head main body can be prevented from being detached from the mounting cylinder member without increasing the manufacturing cost.

  Embodiments of the present invention will be described below with reference to the drawings. The pressing head 1 according to this embodiment is mounted on a discharger in which a stem 2 is erected so as to be able to be pushed in an upward biased state, and is downward from an outer peripheral edge portion of the top wall portion 13b and the top wall portion 13b. The head body 4 is provided with a peripheral wall portion 13 a extending toward the nozzle and a nozzle hole 12, and a valve chamber A that communicates with the inside of the stem 2 and communicates with the outside through the nozzle hole 12. The top wall 8, a mounting cylinder 7 that extends downward from the bottom surface of the top wall 8 and is connected to the stem 2, and has a larger diameter than the mounting cylinder 7 and outside the top wall 8. And a mounting cylinder member 3 including a guide cylinder 10 extending along the vertical direction at the peripheral edge.

  The mounting cylinder member 3 is configured such that the lower end edge of the guide cylinder 10 is lowered by the annular protrusion 13c between the annular protrusion 13c projecting on the inner peripheral surface of the peripheral wall 13a and the valve chamber A inside the head body 4. The guide tube 10 is supported from the side and is disposed so as to be slidable relative to the head body 4. In the example shown in the figure, the annular protrusion 13c is provided on the inner peripheral surface of the lower end portion of the peripheral wall 13a so as to protrude over the entire periphery. The valve chamber A is provided with a valve member 5 that closes the nozzle hole 12 in a forward biased state.

In the illustrated example, the upper end portion of the stem 2 is fitted in the mounting cylinder 7 of the mounting cylinder member 3. Further, on the top surface of the top wall portion 8, a sliding cylinder 9 having a smaller diameter than the mounting cylinder 7 and disposed coaxially with the mounting cylinder 7 is erected. The upper end portion of the sliding cylinder 9 gradually increases in diameter as it goes upward. The mounting cylinder 7 and the sliding cylinder 9 are coaxially disposed at the opening peripheral edge of the through hole 8a formed in the center portion in the radial direction of the top wall 8, and the sliding cylinder 9 is interposed through the through hole 8a. And communicates with the inside of the stem 2.
Furthermore, the guide tube 10 extends downward from the outer peripheral edge of the top wall 8. The length of the guide tube 10 is shorter than the length of the mounting tube 7. Further, a gap is provided in the radial direction between the outer peripheral surface of the mounting cylinder 7 and the inner peripheral surface of the guide cylinder 10.

  Further, as shown in FIG. 2, a pair of guide plates 15 extending upward are provided on the outer peripheral edge of the top wall 8 so as to face each other in the radial direction. A guide groove 17 extending in the vertical direction and reaching the lower end of the guide tube 10 is formed on the outer peripheral surface of each guide plate 15, and the peripheral wall portion 13 a of the head body 4 is formed in each guide groove 17. Sliding projections (not shown) formed on the inner peripheral surface of the slidably fitting portion are slidably fitted. Thus, when the sliding projection is fitted into the guide groove 17, the head main body 4 rotates relative to the mounting cylinder member 3, or the head main body 4 slides up and down relative to the mounting cylinder member 3. It can be prevented from leaning on.

Here, a through hole that opens toward the front is formed in the upper portion of the peripheral wall portion 13a of the head body 4, and extends rearward from the opening peripheral edge of the through hole, and the rear end wall 14a is a peripheral wall. A horizontal cylinder 14 is provided that is located radially inward from the rear part of the part 13a. Thereby, the clearance gap B is provided between the rear-end wall 14a of the horizontal cylinder 14, and the inner surface in the rear part of the surrounding wall part 13a.
A cylindrical nozzle 16 having a nozzle hole 12 formed at the front end is attached to the front portion of the horizontal cylinder 14 with the nozzle hole 12 projecting radially outward from the peripheral wall portion 13a. Yes.

Here, a cylinder 11 communicated with the inside of the horizontal cylinder 14 is suspended from a lower end wall 14b of the horizontal cylinder 14 facing the top wall portion 8 of the mounting cylinder member 3 from above. A sliding cylinder 9 is fitted to the cylinder 11 so as to be able to slide upward. A through hole is formed in the rear end wall 14a of the horizontal cylinder 14, and a cylinder cylinder 18 is fitted into the through hole so that the rear portion of the valve member 5 is supported so as to be slidable backward.
And the valve chamber A in the head main body 4 is comprised by each inside of the horizontal cylinder 14, the nozzle 16, and the cylinder cylinder 18 which were each arrange | positioned coaxially. Further, the valve chamber A communicates with the inside of the stem 2 through the insides of the cylinder 11 and the sliding cylinder 9.

  The valve member 5 has a rod shape and is arranged substantially coaxially with the horizontal cylinder 14, the nozzle 16, and the cylinder cylinder 18, and a rear end portion of the valve member 5 is a through hole formed in the rear end wall 14 a of the horizontal cylinder 14. The valve chamber A is provided in a state protruding from the hole into the gap B. A concave groove 23 is formed over the entire circumference of the rear end portion of the valve member 5 protruding from the valve chamber A to the gap B.

  The outer peripheral surface of the valve member 5 is provided with a skirt-like portion 20 that gradually increases in diameter from the central portion in the axial direction toward the rear, and further on the rear end edge of the skirt-like portion 20 radially outward. An inverted skirt-like portion 21 that is folded back and extends forward is continuously provided. And this reverse skirt-shaped part 21 is fitted by the inner peripheral surface of the cylinder cylinder 18 so that back sliding is possible. Further, the valve member 5 is urged forward by a coil spring 22 interposed between a connecting portion of the skirt-like portion 20 on the outer peripheral surface thereof and the rear end wall 14a of the horizontal cylinder 14. Thereby, the front end 5b of the valve member 5 is brought into close contact with the inner peripheral surface of the nozzle hole 12 so that the nozzle hole 12 can be closed.

  Here, the rear end portion of the valve member 5 protruding rearward from the valve chamber A is bent forward as it goes downward, and its lower end portion is disposed on the top wall portion 8, and the mounting cylinder member The lever member 6 supported so as to be swingable is connected so as to move the valve member 5 backward when the head body 4 is pressed with respect to the head 3. In the side view of the pressing head 1 as shown in FIG. 1, the lever member 6 has a first flat plate portion 24 that is formed in a rectangular shape that is long in the vertical direction, and an inclination that gradually goes forward from the top to the bottom. And a second flat plate portion 25 formed in a rectangular shape that is long in the direction. The lower end of the first flat plate portion 24 and the upper end of the second flat plate portion 25 are connected to form an L shape. And in the connection part of these 1st flat plate parts 24 and the 2nd flat plate parts 25, the pin member 28 is respectively separated toward the said orthogonal direction at the both ends of the orthogonal direction orthogonal to both the front-back direction and an up-down direction. Projected.

A first cutout portion 26 that penetrates in the front-rear direction and opens upward is formed in the center portion in the orthogonal direction in the upper portion of the first flat plate portion 24, and the first cutout portion 26 has a first cutout portion 26. The concave groove 23 of the valve member 5 is fitted.
A second cutout portion 27 that penetrates in the vertical direction and opens forward is formed in the center portion in the orthogonal direction in the lower portion of the second flat plate portion 25, and the second cutout portion 27 is formed in the second cutout portion 27. A sliding cylinder 9 of the mounting cylinder member 3 and a cylinder 11 of the head body 4 are arranged.

Here, the pin member 28 is rotatably supported by a pair of bearings 29 provided in the head body 4. These bearings 29 are formed integrally with a mounting plate 30 that is fitted to a portion located directly below the horizontal cylinder 14 on the inner peripheral surface of the peripheral wall portion 13a. That is, the bearing 29 is a pair of plate-like bodies that are vertically provided at intervals in the orthogonal direction at a portion located directly below the gap B on the lower surface of the mounting plate 30. An elongated hole 29a that extends and opens downward is formed.
Then, by inserting the pin members 28 into the respective elongated holes 29 a of the pair of bearings 29, the lever member 6 swings around the pin member 28.

  The mounting plate 30 is formed with a window hole 30b through which the first flat plate portion 24 of the lever member 6 is inserted around the pin member 28 so as to be swingable in the front-rear direction. Further, a notch 33 opening in the radial direction is formed at the outer peripheral edge of the mounting plate 30, and a locking rib 34 protruding from the inner peripheral surface of the peripheral wall 13 a of the head body 4 is formed in this notch 33. By engaging, rotation of the mounting plate 30 with respect to the peripheral wall portion 13a is prevented.

  Here, in this embodiment, for example, the upward biasing force of the stem 2 is made larger than the biasing force of the coil spring 22 that biases the valve member 5 forward, or between the sliding cylinder 9 and the cylinder 11. The pressing force of the head body 4 against the mounting cylinder member 3 is smaller than the pressing force of the stem 2 by appropriately setting the friction force and the friction force generated when the lever member 6 swings.

  In the present embodiment, a restriction ring 19 that restricts deformation of the guide tube 10 toward the radially inner side is fitted to the inner peripheral surface of the guide tube 10 in the mounting tube member 3. In the illustrated example, the length of the restriction ring 19 in the vertical direction is equal to the length of the guide tube 10 in the vertical direction. Further, a gap is provided between the inner peripheral surface of the restriction ring 19 and the outer peripheral surface of the mounting cylinder 7. Further, in the present embodiment, a flange portion 19 a is projected from the lower end portion of the regulating ring 19 toward the radially inner side. The radially inner end edge of the flange portion 19 a is close to the outer peripheral surface of the lower end portion of the mounting cylinder 7.

  In the above configuration, the upper end portion of the first flat plate portion 24 and the valve member 5 are urged forward by the coil spring 22 so that the valve member 5 closes the nozzle hole 12 and the lower end portion of the first flat plate portion 24 is the top wall. When the top wall portion 13b of the head main body 4 is pressed downward from the state where the portion 8 is pressed downward, first, the pressing drag of the stem 2 is larger than the pressing drag of the head main body 4 against the mounting cylinder member 3, The stem 2 is not pushed down, and the head body 4 is pushed down with respect to the mounting cylinder member 3.

  At this time, the lever member 6 is slid forward on the top wall portion 8 of the mounting cylinder member 3 against the front biasing force of the coil spring 22, and the top wall portion 8 The pin member 28 is pushed up and swings around the pin member 28 so that the upper end portion is moved rearward. Accordingly, the valve member 5 is moved rearward together with the upper end portion of the lever member 6, and the nozzle hole 12 is opened. Further, at this time, the annular protrusion 13 c of the head body 4 is separated downward from the lower end edge of the guide tube 10 of the mounting tube member 3.

  Further, by pressing the top wall portion 13b of the head body 4 downward, the lower end of the cylinder 11 is brought into contact with the upper surface of the top wall portion 8 of the mounting cylinder member 3, and this pressing force is applied to the mounting cylinder member 3. Then, the stem 2 is moved downward and the liquid in the container body is caused to flow from the inside of the stem 2 into the valve chamber A via the sliding cylinder 9, thereby ejecting the liquid from the nozzle hole 12 to the outside. .

  Next, when the pressure against the top wall portion 13 b of the head body 4 is released, the head body 4 rises together with the mounting cylinder member 3 by the upward biasing force of the stem 2, and the valve member 5 moves by the elastic restoring force of the coil spring 22. It moves forward together with the upper end of the lever member 6. In this process, first, the stem 2 returns to the raised end position, and then the nozzle hole 12 is closed, and the lower end portion of the lever member 6 presses the top wall portion 8 of the mounting cylinder member 3 downward so that the head body 4 is moved. It pushes upward with respect to the mounting cylinder member 3.

As described above, according to the push-down head 1 according to the present embodiment, the restriction ring 19 is provided, so that when an external force or the like is applied to the head body 4, the head body 4 moves against the mounting cylinder member 3. Even if the annular protrusion 13c is moved upward and tries to get over the lower end edge of the guide tube 10, the reduction of the diameter of the guide tube 10 is restricted, so that the head main body 4 is prevented from being detached from the mounting tube member 3. Can do.
On the contrary, the force by which the lower end portion of the insulator member 6 presses the top wall portion 8 downward by the forward urging force transmitted from the rear end portion of the valve member 5 to the upper end portion of the insulator member 6. Even if, for example, the mounting cylinder member 3 is moved downward with respect to the head main body 4 by the internal pressure of the valve chamber A and the like, and the lower end edge of the guide cylinder 10 tries to get over the annular protrusion 13c of the head main body 4, Since the diameter reduction deformation of the guide cylinder 10 is restricted, it is possible to suppress the mounting cylinder member 3 from falling off the head body 4.
In addition, since it is sufficient to provide the regulating ring 19 in order to achieve such an effect, when the mounting cylinder member 3 is injection-molded, it becomes possible to apply the current mold almost as it is, and to manufacture it. An increase in cost can also be suppressed.

  Furthermore, in this embodiment, since the flange portion 19a projects from the inner peripheral surface of the regulating ring 19 toward the radially inner side, the resistance force to the diameter reduction deformation applied to the guide tube 10 is further increased. It becomes possible to increase.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the flange portion 19a is provided on the regulating ring 19, but the flange portion 19a may not be provided. Further, the vertical position for forming the flange portion 19a is not limited to the above-described embodiment, and may be appropriately changed, for example, in the vertical central portion or the upper portion.
Further, the length of the regulating ring 19 in the vertical direction is not limited to the above embodiment, and may be changed as appropriate.
Further, as a discharger to which the pressing head 1 is attached, for example, a pump having a cylinder, a piston, or the like, an aerosol type discharger, or the like may be appropriately selected.
Further, the radially inner end of the flange portion 19 a may be brought into contact with the outer peripheral surface of the mounting cylinder 7 in the mounting cylinder member 3. In this case, the diameter reduction deformation of the guide tube 10 can be reliably prevented.

  Further, instead of the pressing head 1 shown in FIG. 1, for example, a pressing head 40 as shown in FIG. 3 may be adopted. 3, a cylindrical adapter 41 is fitted in the mounting cylinder 7 of the mounting cylinder member 3, and a stem (not shown) is fitted in the lower end portion of the adapter 41. It has become. In the illustrated example, the adapter 41 has an upper part 41a fitted in the mounting cylinder 7 and a lower part 41b having a larger diameter than the upper part 41a and extending downward from the lower edge of the mounting cylinder 7 2. It is formed in a step cylinder shape. In the state where the upper portion 41a of the adapter 41 is fitted into the mounting cylinder 7, the lower end edge of the mounting cylinder 7 is supported from the lower side on the step portion 41c between the upper portion 41a and the lower portion 41b in the adapter 41. It has become so. Further, the lower end portion of the adapter 41 is positioned below the lower end edge of the head body 4 in which the mounting cylinder member 3 is disposed.

  Further, the adapter 41 and the regulation ring 19 having the flange portion 19a are integrally formed. In the illustrated example, the restriction ring 19 has a cylindrical portion 19b that extends downward from the radially inner end of the flange portion 19a and has a lower end portion that continues to the stepped portion 41c of the adapter 41 without any step from the radially outer side. The regulation ring 19 and the adapter 41 are connected via the cylindrical portion 19b.

In the case of the configuration shown in FIG. 3, since the adapter 41 is provided, it is possible to increase the types of containers to which the pressing head 40 can be applied. Further, the regulation ring 19 is connected to the adapter 41. Since they are integrally formed, the number of parts of the pressing head 40 can be suppressed, and an increase in manufacturing cost can be suppressed.
In the configuration shown in FIG. 3 as well, the radially inner end of the flange portion 19 a may be brought into contact with the outer peripheral surface of the mounting cylinder 7 in the mounting cylinder member 3. In this case, the diameter reduction deformation of the guide tube 10 can be reliably prevented.

  It is possible to suppress the head main body from being detached from the mounting cylinder member without increasing the manufacturing cost.

It is a schematic longitudinal cross-sectional view which shows the pressing head shown as one Embodiment based on this invention. It is the (a) side view and (b) bottom view which show the mounting cylinder member shown in FIG. It is a schematic longitudinal cross-sectional view which shows the pressing head shown as other embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 40 Depressing head 2 Stem 3 Mounting cylinder member 4 Head main body 5 Valve member 6 Insulating member 7 Mounting cylinder 8 Top wall part 10 Guide cylinder 12 Nozzle hole 13a Peripheral wall part 13b Top wall part 13c Annular protrusion 19 Control ring 19a Flange part A Valve room

Claims (3)

A pressing head mounted on a dispenser having a stem upright so as to be able to be pushed in an upward biasing state;
A top wall portion, a peripheral wall portion extending downward from the outer peripheral edge portion of the top wall portion, and a nozzle hole are provided, and the inside communicates with the inside of the stem and communicates with the outside through the nozzle hole. A head body in which a valve chamber is defined;
A top wall, a mounting cylinder that extends downward from the bottom surface of the top wall and is connected to the stem, and has a diameter larger than that of the mounting cylinder and along the outer peripheral edge of the top wall along the vertical direction. A mounting cylinder member including an extended guide cylinder,
In this mounting cylinder member, the lower end edge of the guide cylinder is supported from the lower side by the annular protrusion between the annular protrusion protruding from the inner peripheral surface of the peripheral wall and the valve chamber inside the head body. And the guide cylinder is fitted and arranged so as to be slidable relative to the head body.
The valve chamber is provided with a valve member that closes the nozzle hole in a forward biased state,
The rear end portion of the valve member is bent forward as it goes downward, and the lower end portion thereof is disposed on the top wall portion, and the valve member is moved backward when the head body is pressed against the mounting cylinder member. The lever member supported so as to be able to swing is connected,
A push-down head, wherein a restriction ring for restricting deformation of the guide cylinder inward in the radial direction is fitted in the guide cylinder of the mounting cylinder member. The pressing head according to claim 1, wherein
2. A pressing head according to claim 1, wherein a flange portion projects from an inner circumferential surface of the regulating ring toward a radially inner side thereof. The pressing head according to claim 2,
A cylindrical adapter is provided between the stem and the mounting cylinder,
The pressing head, wherein the restriction ring is formed integrally with the adapter.

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