JP2019218098A - Jetting unit - Google Patents

Abstract

To provide a jetting unit capable of easily lengthening a discharge time per one time while suppressing increase in cost.SOLUTION: The jetting unit comprises a jetting device for jetting a liquid composition stored in a container. The jetting device comprises a pump which sucks the liquid composition from the inside of the container by an operation of an operation part 35 of a trigger lever 31 and forcibly feeds it. The pump comprises: a cylinder 29 which opens toward the jetting direction; a piston 30 which forms a cylinder chamber between the cylinder and the piston and pressurizes the liquid composition in the cylinder chamber by being slid along an inner face of the cylinder; and a transmission part 31C which generates a force for pressurizing the liquid composition in the cylinder chamber by transmitting the force applied to the operation part. The transmission part is elastically deformed in a direction opposite to a direction in which the piston pressurizes the liquid composition by a load from the liquid composition pressurized in the cylinder chamber, and pressurizes the liquid composition in the cylinder chamber by an elastic restoring force by which the elastic deformation is released after pulling the trigger lever.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ejector.

  BACKGROUND ART Conventionally, a trigger-type ejector that ejects a liquid by pulling an operation lever (trigger lever) has been known as an ejector that ejects a liquid. Such a trigger type ejector is provided with a pump including a piston and a cylinder for pressurizing and pumping the liquid in the container by repeatedly pulling a trigger lever (for example, Patent Document 1).

  In the trigger type ejector as described above, for example, when discharging a liquid to a wide range of objects in applications such as bathroom detergent, or when performing multiple discharges, each time the trigger lever is pulled, It has been known that the longer the discharge time of the ink, the less the burden on the user.

  Patent Document 2 discloses that by providing a throttle between a cylinder and a jetting portion to restrict the flow of the content liquid in accordance with the pressure of the content liquid pushed out by a piston, the jetting time is extended while maintaining a good jetting state. A possible triggered ejector is disclosed.

  Further, Patent Literature 3 discloses a trigger type ejector in which an auxiliary cylinder and an auxiliary piston are continuously connected to a lower portion of a cylinder so that a liquid can be ejected for a while even after the trigger lever is pulled out. I have.

JP 2004-105919 A JP 2015-213855 A JP 2011-212572 A

  However, in the trigger type ejector described in Patent Literature 2 described above, since the flow of the content liquid is restricted, the resistance when pulling the trigger lever increases. Therefore, for example, it may be difficult for a woman or an elderly person to keep pulling the trigger lever for a long time. Further, in the trigger type ejector described in Patent Literature 2, since the number of components is increased by providing the throttle portion, there is a problem that the cost is increased.

  In the trigger type ejector described in Patent Literature 3, it is necessary to move a piston and an auxiliary piston provided together in an energized state against the urging force. As with the instrument, it can be difficult to keep the trigger lever pulled long. Further, in the trigger type ejector described in Patent Literature 3, since the auxiliary cylinder and the auxiliary piston are provided, the number of parts increases and the cost increases.

  In particular, in recent years, a large-capacity ejection type ejector that ejects a larger amount of content liquid than before by a single operation of the trigger lever is desired. The problem of resistance when pulling becomes more pronounced.

  The present invention has been made in consideration of the above points, and has as its object to provide an ejector capable of easily increasing the discharge time per discharge while suppressing an increase in cost.

  According to a first aspect of the present invention, there is provided an ejector provided with an ejection device for ejecting a liquid composition contained in a container, wherein the ejection device is operated from an inside of the container by operating an operation section of a trigger lever. A pump for sucking and pumping the liquid composition, wherein the pump forms a cylinder chamber between the cylinder and the cylinder that opens in a jetting direction, and extends along an inner peripheral surface of the cylinder. A piston that slides and pressurizes the liquid composition in the cylinder chamber, and a transmission unit that transmits a force applied to the operation unit to generate a force that pressurizes the liquid composition in the cylinder chamber. The transmission unit is configured to be elastically deformed during an operation of pulling the trigger lever, so that the piston is pressurized with respect to the operation unit in a direction opposite to a direction in which the liquid composition is pressed. And an ejector characterized by generating a force for pressurizing the liquid composition in the cylinder chamber with an elastic restoring force that releases the elastic deformation after pulling the trigger lever. .

  Further, in the ejector according to the one aspect of the present invention, the transmission portion includes a connection portion of the trigger lever with the piston.

  Further, in the ejector according to the one aspect of the present invention, the bending rigidity of the trigger lever in the operation region including the operation portion in the sliding direction of the piston may be the same as that of the connection region in the trigger lever including the connection portion. The bending rigidity in the sliding direction is smaller than the bending rigidity.

  Further, in the ejector according to the one aspect of the present invention, the trigger lever is formed in a rectangular frame shape having a depression opened in a direction to pressurize the liquid composition, and the connection region of the trigger lever is formed. Has a first rib portion extending in a short side direction of the rectangular frame and a second rib portion extending in a long side direction in the depression, and the operation area has the first rib portion, and the second rib It does not have a part.

  Further, in the ejector according to the aspect of the present invention, the trigger lever can swing around an axis orthogonal to a sliding direction of the piston, and a distance between the axis and the operation unit is the axis. The distance is larger than the distance between the link and the connecting portion.

  Further, in the ejector according to one aspect of the present invention, when the angular velocity of the operation unit around the axis when the liquid composition is pressurized is θ1, and the angular velocity of the connection unit around the axis is θ2, θ1 > Θ2.

  Further, in the ejector according to one aspect of the present invention, a ratio (θ1 / θ2) of the angular velocity θ1 of the operation unit to the angular velocity θ2 of the connecting part satisfies a relationship of 1 <(θ1 / θ2) <3. It is characterized by the following.

  Further, in the ejector according to the one aspect of the present invention, the piston slides along a shaft portion connected to the trigger lever on a side opposite to a direction in which the liquid composition is pressurized, and along the inner peripheral surface. A sliding portion that moves, and a second connecting portion that radially connects the shaft portion and the sliding portion, wherein the transmitting portion is at least a part of the second connecting portion. And

  Further, in the ejector according to the aspect of the present invention, the second connection portion may include a first portion having a first bending rigidity in a sliding direction of the piston, and a second bending portion having a first bending rigidity smaller than the first bending rigidity. And a second portion having rigidity, wherein the transmission portion is disposed on the second portion.

  Further, in the ejector according to one aspect of the present invention, the second portion has a smaller thickness in the sliding direction than the first portion.

  Further, in the ejector according to one embodiment of the present invention, 2 ml or more of the liquid composition is ejected by one operation of pulling the trigger lever.

  According to the present invention, it is possible to provide an ejector that can easily increase the discharge time per discharge while suppressing an increase in cost.

It is a sectional view showing a trigger type ejector of a 1st embodiment of the present invention. It is a partial enlarged drawing showing the reciprocating pump of the trigger type ejector of a 1st embodiment. It is an external appearance perspective view of the piston 30 which comprises a reciprocating pump. (A) is the figure which looked at the trigger 31 from the -Y side, (b) is the figure which looked at the trigger 31 from the -X side. FIG. 5 is a sectional view taken along line BB in FIG. FIG. 4 is a partially enlarged view showing a position of a piston 30 when a trigger 31 is pulled. It is a figure which shows the relationship between the elapsed time after starting to pull the trigger 31, and the ejection amount of the liquid composition ejected for every elapsed time. It is the top view which looked at piston 30 in trigger type ejector 1 of a 2nd embodiment from + Y side. FIG. 4 is a rear view of the piston 30 as viewed from the −Y side. FIG. 9 is a sectional view taken along line CC in FIG. 8. FIG. 11 is a cross-sectional view showing a state where the second portion 52 is elastically deformed in FIG. 10. It is the figure which looked at the trigger 31 in the trigger type ejector of 2nd Embodiment from -Y side. It is the figure which looked at the trigger 31 of the modification from the -Y side.

Hereinafter, an embodiment of the ejector of the present invention will be described with reference to FIGS.
The following embodiments show one aspect of the present invention, and do not limit the present invention, and can be arbitrarily changed within the technical idea of the present invention. Further, in the following drawings, the scale and number of the actual structure are different from those of the actual structure in order to make each structure easy to understand.

  In the description, an XYZ coordinate system is set, and the positional relationship of each member will be described with reference to the XYZ coordinate system. In this case, the vertical direction is defined as the Z-axis direction, and the horizontal direction, in which the piston 30 (see FIG. 1) slides, is defined as the Y-axis direction, and the direction orthogonal to the Y-axis direction and the Z-axis direction is defined as the X-axis direction. Further, in the following description, the ejection direction refers to a main direction among the directions in which the liquid composition is ejected to the outside, and in this embodiment, is the + Y direction.

[First Embodiment]
First, each part of the trigger type ejector of the first embodiment will be described.
FIG. 1 is a sectional view showing a trigger type ejector according to the first embodiment. FIG. 2 is a partially enlarged view showing a reciprocating pump of the trigger type ejector of the first embodiment.

  As shown in FIG. 1, a trigger type ejector (ejector) 1 is attached to a container 21 and a neck 21 a of the container 21, and is a trigger type ejector for ejecting a liquid composition contained in the container 21. Device 2. The trigger type ejector 1 has a built-in reciprocating pump (pump) 3 that is operated by a trigger lever (hereinafter referred to as a trigger) 31 inside the ejection device 2, and interlocks with the operation of the trigger 31. Is operated to suck up and eject the liquid composition in the container 21. The shape of the container 21 is not particularly limited as long as the liquid composition can be accommodated, and may be any shape.

The ejection device 2 includes a liquid sending tube 23, a valve unit 24, a reciprocating pump 3, a body 4, a liquid guide plug 27, a nozzle member (ejection unit) 26, and a trigger 31.
The liquid sending tube 23 is for sucking and sending the liquid composition in the container 21, and one end is disposed in the container 21 and the other end is connected to a valve part 24 attached to the body 4. .

  The reciprocating pump 3 is a piston that forms a cylinder chamber 29a between the cylinder 29 connected to the valve portion 24 and the cylinder 29 and slides along the inner peripheral surface 29f of the cylinder 29 with the Y direction as a sliding direction. And a ring member 9 through which a part of the piston 30 is inserted so as to movably hold the piston 30 in the sliding direction thereof. When the trigger 31 adjacent to the piston 30 is operated, the reciprocating pump 3 sucks the liquid composition from the inside of the container 21 and pressurizes and sends the liquid composition to the body 4 via the valve unit 24.

  The trigger 31 is provided to be swingable about the rotation axis A. In a state where the trigger 31 is not operated, the trigger 31 extends vertically downward (−Z side) in the ejection direction (+ Y direction). The trigger 31 is connected to the body 4 via the return spring 6, and the spring piece 13 hanging down from the horizontal substrate 12 is elastically deformed according to the operation of the trigger 31. The horizontal substrate 12 of the return spring 6 receives a large force due to the deformation of the spring piece 13 due to the operation of the trigger 31, but the function of causing the spring piece 13 to exert an elastic restoring force at the same time as the pulling operation of the trigger 31 is released. Fulfill.

  The body 4 is formed of a synthetic resin (for example, PP, PE, Ny, PET, PS, POM, PAN, ABS, or the like), and has a valve portion 24 and a reciprocating pump 3 inside. The upper part of the body 4 has a liquid passage (supply path) 25 that communicates with the inside of the cylinder chamber 29a via the valve part 24, and a cylindrical liquid passage 38 in which the liquid passage 25 is formed. . A liquid guide plug 27 is fitted to the tip of the liquid passage part 38 of the body 4, and the nozzle member 26 is attached to the tip of the liquid guide plug 27. A cover 5 made of synthetic resin is attached to the outside of the body 4.

  Next, a specific configuration of each component will be described.

As shown in FIGS. 1 and 2, the reciprocating pump 3 has a cylindrical cylinder 29 that opens in the ejection direction and a piston that opens in the axial direction opposite to the ejection direction and is housed in the cylinder 29. 30.
An annular cylinder chamber 29 a formed between the cylinder 29 and the piston 30 is provided inside the cylinder 29. The cylinder chamber 29a is formed not only inside the cylinder 29 but also inside the piston 30, and can accommodate a liquid composition supplied from the container 21 via the valve portion 24. The maximum volume of the cylinder chamber 29a (the volume in the state of FIG. 1) is equal to or greater than the amount of the liquid composition ejected from the nozzle member 26 by one pulling operation of the trigger 31.

  The cylinder 29 has an inner peripheral surface 29f, is open on the + Y side, and has a bottomed cylindrical main body 41 having a bottom wall 42 at an end on the −Y side, and faces the cylinder chamber 29a of the bottom wall 42. An inner core portion 29b extends coaxially with the main body portion 41 along the Y direction from the bottom surface 42a to the opening side (+ Y side). A piston 30 is provided inside the cylinder 29 so as to cover the outer periphery of the inner core 29b. On the lower side (-Z side), which is a part of the cylindrical side wall of the cylinder 29, a gas-liquid introduction hole 29c for guiding the residual pressure and the liquid in the cylinder 29 to the gas-liquid introduction path 14 is formed. ing. The gas-liquid introduction path 14 includes a space formed between the cylinder 29 and the body 4 and communicates with the inside of the container 21. Specifically, the gas-liquid introduction passage 14 communicates with the inside of the container 21 via a communication hole 4a formed at a lower portion of the body 4 and a communication hole 24g formed at a lower portion of the valve portion 24.

  The piston 30 is connected to the trigger 31 on the + Y side, has a hollow portion 43 that opens on the −Y side and extends in the Y direction into which the inner core portion 29b is inserted, and an outer peripheral surface on the opening side of the shaft portion 30a. (A second connecting portion) 30b provided on the first and second portions, and a sliding portion 30c provided over the periphery of the flange portion 30b. The piston 30 is incorporated so that the inner core 29b of the cylinder 29 is inserted into the shaft 30a.

FIG. 3 is an external perspective view of the piston 30.
The sliding portion 30c is provided over the entire circumference around the Y axis centered on the shaft portion 30a. The sliding portion 30c is provided in close contact with the inner peripheral surface 29f of the cylinder 29, and slides along the inner peripheral surface 29f of the cylinder 29. The sliding portion 30c is provided with a concave portion 30e that is recessed inward in the radial direction at a center portion in the sliding direction (Y-axis direction) of the piston 30. The position of the −Y side end of the sliding portion 30 c is the same as the position of the −Y side end of the shaft 30 a in the piston 30.

  The concave portion 30e is a portion that functions to secure the liquid composition that has flowed out of the cylinder chamber 29a along the inner peripheral surface 29f of the cylinder 29 and to flow out to the gas-liquid introduction hole 29c. The + Y-side tip of the piston 30 is engaged with the rear side of the trigger 31 so that the piston 30 can slide in the Y-axis direction in conjunction with the trigger 31.

  The flange portion 30b radially connects the shaft portion 30a and the sliding portion 30c. The flange portion 30b is formed in a disk shape substantially parallel to the XZ plane.

FIG. 4A is a view of the trigger 31 viewed from the −Y side. FIG. 4B is a view of the trigger 31 viewed from the −X side.
The trigger 31 has a substantially U-shaped main part 31A whose cross section orthogonal to the length direction is opened toward the −Y side, a rotation axis A provided on the main part 31A, and a main part 31A. And a connecting portion 31C connected to the piston 30.

  The main body 31A has a pair of side walls 61 parallel to the YZ plane and separated in the X direction, and a side wall 62 connecting the + Y side ends of the pair of side walls 61. As shown in FIG. 4A, the main body 31 </ b> A is surrounded by side walls 61 and 62 in a front view from the −Y side (hereinafter referred to as a −Y direction view), and opens toward the −Y side. , + Z side are formed in a rectangular frame shape having a depression 63 opened.

  The rotation shaft A is swingably fitted into a hole (not shown) provided in the body 4. The rotation axes A are arranged near the + Z-side end of each side wall 61, respectively. The rotation axis A extends coaxially outward in the X direction.

  As shown in FIG. 4A, a rectangular rib 70 and a plate-like rib 71 are provided in the depression 63 of the main body 31A as viewed in the −Y direction. The rib 70 is arranged on the −Z side of the rotation axis A. The rib 70 has a first rib 70a extending in the X direction which is the short side direction of the rectangular frame-shaped main body 31A, and a second rib 70b extending in the Z direction which is the long side direction. The rib 70 protrudes from the side wall 62 toward the −Y side.

  The connecting portion 31C is provided on each of the second ribs 70b of the rib 70. As shown in FIG. 4B, each connecting portion 31C is formed around an axis extending in the X direction, and is formed in a columnar shape protruding from the main body portion 31A to the −Y side. The connecting portions 31C are coaxially arranged.

FIG. 5 is a sectional view taken along line BB in FIG.
As shown in FIG. 5, each connecting portion 31C protrudes inward of the second rib 70b in the X direction. As shown in FIG. 2, FIG. 3, and FIG. 5, on both sides in the X direction at the + Y side tip of the piston 30, a recess 33 into which a connecting portion 31C protruding inward from the second rib 70b fits. And an engagement surface 34 that engages with the outer peripheral surface of the connecting portion 31C from the −Y side. The trigger 31 is connected to the piston 30 by fitting the connecting portion 31C into the recess 33 and engaging the outer peripheral surface of the connecting portion 31C with the engaging surface 34 from the + Y side.

  In the length direction of the main body 31A, a region including the connecting portion 31C is a connecting region connected to the piston 30, and the rib 70 is arranged in the connecting region. That is, the connection region has the first rib 70a extending in the short side direction and the second rib 70b extending in the long side direction.

  The rib 71 is disposed closer to the rocking tip than the rib 70 provided with the connecting portion 31C. That is, the rib 71 is disposed at a position where the distance from the rotation axis A is farther than the distance between the rib 70 and the rotation axis A. The rib 71 extends in the X direction when viewed in the −Y direction, and is connected to the pair of side walls 61 and 62. The plurality of ribs 71 (three in FIG. 4A) are provided at intervals in the length direction of the main body 31A.

  In the main body portion 31A of the trigger 31, the swinging tip side is the operation portion 35, and by pulling the operation portion 35, the liquid composition contained in the container 21 is ejected. In the length direction of the main body 31A, an area including the operation section 35 is an operation area operated to apply a force for pulling the trigger 31, and a rib 71 is arranged in the operation area.

  The connecting region is provided with a rib 70 having a first rib 70a extending in the X direction and a second rib 70b extending in the Z direction, whereas the operating region is a rib (first rib) 71 extending in the X direction. And the bending rigidity around the rotation axis A in the operation area is set to be smaller than the bending rigidity around the rotation axis A in the connection area. I have.

  In the trigger type ejector 1 having the above-described configuration, when the user grips or loosens the trigger 31, the piston 30 moves along the horizontal direction (Y-axis direction) where the inner core portion 29 b of the cylinder 29 projects. And slide. Specifically, when the user grips the operation unit 35 of the trigger 31 and pulls it toward the −Y side to approach the container 21, the piston 30 moves to the valve unit 24 side (−Y side). By loosening the trigger 31, the piston 30 moves to the trigger 31 side (+ Y side) by the elastic restoring force of the spring piece 13.

  When the user grips the operation unit 35 of the trigger 31 and pulls it toward the −Y side, the trigger 31 swings around the rotation axis A (counterclockwise in FIG. 1). When the trigger 31 swings around the rotation axis A, the piston 30 connected to the connecting portion 31C moves toward the −Y side, and pressurizes the liquid composition in the cylinder chamber 29a to eject the liquid composition from the nozzle member 26. In other words, the connecting portion 31C functions as a transmitting portion that transmits the force applied to the operating portion 35 to the piston 30 to generate a force that pressurizes the liquid composition in the cylinder chamber 29a.

  Further, when the user grips the operation unit 35 of the trigger 31 and pulls it toward the −Y side, the user pulls the trigger 31 against the elastic restoring force of the spring piece 13. At this time, since the bending stiffness of the trigger 31 around the rotation axis A in the operation region is smaller than the bending stiffness around the rotation axis A in the connection region, as shown by the two-dot chain line in FIG. Also elastically deforms to the −Y side with a large deformation amount.

  Therefore, when the trigger 31 swings around the rotation axis A, the angular velocity θ1 in the operation area satisfies the relation of θ1> θ2 greater than the angular velocity θ2 of the connection area, that is, the relation of (θ1 / θ2)> 1. . As a result, the connecting portion 31C is relatively displaced with respect to the operating portion 35 to the + Y side, which is the side opposite to the direction in which the piston 30 presses the liquid composition.

FIG. 6 is a partially enlarged view showing the position of the piston 30 when the trigger 31 is pulled.
As shown in FIG. 6, in the initial state before pulling the trigger 31, the piston 30 having the −Y side end at the position 30 </ b> A has the connecting portion 31 C on the + Y side with respect to the operation portion 35 even when the trigger 31 is pulled out. , The connecting portion 31C is disposed at a position 30B on the + Y side from the position 30C when the trigger 31 is pulled out in a state where the connecting portion 31C is not relatively displaced with respect to the operation portion 35. . Thereby, an amount of the liquid composition corresponding to the distance between the position 30A and the position 30B of the piston 30 is ejected.

  At this time, the state of holding the operation unit 35 of the trigger 31 is continued, and the operation of pulling the trigger 31 has been completed, so that the operation unit 35 is held at the position where the trigger 31 is completely pulled out. Therefore, when the connecting portion 31C moves in the −Y direction due to the elastic restoring force that releases the elastic deformation in the operation region and the connecting region, the piston 30 moves in the −Y direction to apply the liquid composition in the cylinder chamber 29a. Press. After the trigger 31 is completely pulled, an amount of the liquid composition corresponding to the distance between the position 30B and the position 30C of the piston 30 is ejected with a delay from the operation of pulling the trigger 31.

  FIG. 7 is a diagram illustrating the relationship between the elapsed time from when the trigger 31 is started to be pulled and the ejection amount of the liquid composition ejected for each elapsed time. The graph G1 in FIG. 7 shows the relationship between the elapsed time and the ejection amount when there is a difference in bending stiffness between the operation area and the connection area in the trigger 31. A graph G2 in FIG. 7 shows the relationship between the elapsed time and the ejection amount when there is no difference in bending stiffness between the operation area and the connection area in the trigger 31.

  As shown as a graph G2 in FIG. 7, when there is no difference in bending stiffness between the operation region and the connection region in the trigger 31, the ejection of the liquid composition is completed at the timing T1 when the trigger 31 is pulled out. On the other hand, as shown as a graph G1 in FIG. 7, when there is a difference in bending stiffness between the operation region and the connection region in the trigger 31, the elastic deformation in the operation region and the connection region is released. When the connecting portion 31C moves in the −Y direction by the restoring force, the ejection of the liquid composition is completed at a timing T2 that is delayed from the timing T1 when the trigger 31 is completely pulled.

The ratio (θ1 / θ2) between the angular velocity θ1 of the operation area and the angular velocity θ2 of the connection area preferably satisfies the relationship of (θ1 / θ2) <3. When the value of (θ1 / θ2) is 3 or more, it may be felt that the time from the timing T1 when the trigger 31 is completely pulled to the timing T2 when the ejection of the liquid composition is completed is too long. In addition, when the value of (θ1 / θ2) is 3 or more, the deformation of the trigger 31 is too large, giving the user a sense of discomfort or discomfort, which may lower the usability.
Therefore, it is preferable that the relationship of 1 <(θ1 / θ2) <3 is satisfied, in order to reduce the burden on the user without increasing the usability and to reduce the burden on the user.

  As described above, in the trigger type ejector 1 of the present embodiment, the coupling portion 31C is relatively displaced to the + Y side with respect to the operation portion 35 due to the elastic deformation generated during the operation of pulling the trigger 31, and the trigger is released. Since the piston 30 can be moved by the elastic restoring force to release the elastic deformation after the 31 has been pulled, the liquid composition can be pressurized and ejected, so that the ejection time per one operation of pulling the trigger 31 can be easily reduced. Can be long. Further, in the trigger type ejector 1 of the present embodiment, since the above-described elastic deformation is caused by a difference in bending stiffness between the operation area and the connection area in the trigger 31, the trigger 31 can be easily formed while suppressing an increase in cost. The discharge time per one operation of pulling can be easily increased.

  In particular, in the present embodiment, instead of ejecting the liquid composition of about 1 ml by the operation of pulling the trigger 31 once, which has been often used in the past, it is used for ejecting a large volume liquid composition of 2 ml or more. Even when the burden on the user may increase, it is possible to reduce the burden on the user by increasing the ejection time.

[Second embodiment]
Next, each part of the trigger type ejector according to the second embodiment will be described with reference to FIGS.
In these figures, the same components as those of the trigger type ejector 1 of the first embodiment shown in FIGS. 1 to 7 are denoted by the same reference numerals, and the description thereof will be omitted.

  In the trigger type ejector 1 of the second embodiment, due to the elastic deformation generated during the operation of pulling the trigger 31, it is displaced relatively to the + Y side with respect to the operation unit 35, and after the trigger 31 is pulled out, the elastic deformation The case where the transmitting portion that generates the force for pressurizing the liquid composition in the cylinder chamber 29a with the elastic restoring force that is released is the flange portion 30b will be described.

  FIG. 8 is a plan view of the piston 30 viewed from the + Y side. FIG. 9 is a rear view of the piston 30 viewed from the −Y side. FIG. 10 is a sectional view taken along line CC in FIG. FIG. 11 is a cross-sectional view showing a state where the second portion 52 is elastically deformed in FIG.

  As shown in FIGS. 8 to 10, the flange portions 30b have a first portion 51 and a second portion 52 which are alternately arranged in the circumferential direction and have different bending stiffness in the sliding direction (Y-axis direction). . The first portion 51 is disposed on both sides of the shaft portion 30a in the Z direction and continuously connects the shaft portion 30a and the sliding portion 30c in the radial direction. The second portion 52 is disposed on both sides of the shaft portion 30a in the X direction, and continuously connects the shaft portion 30a and the sliding portion 30c in the radial direction. That is, the first portion 51 is arranged along the direction in which the trigger 31 extends, and the second portion 52 is arranged along a direction orthogonal to the direction in which the trigger 31 extends.

  The first portion 51 is formed in a region surrounded by two ridge lines extending in the radial direction from the axial center of the piston 30, the shaft portion 30a, and the sliding portion 30c when viewed in the Y direction. The two ridge lines are formed symmetrically about a straight line passing through the axis center and parallel to the Z axis.

  The number of the first portion 51 and the second portion 52, the size in the circumferential direction, and the like are merely examples, and can be arbitrarily selected according to the time for delaying the ejection of the liquid composition from the operation of pulling the trigger 31. is there.

  The first portion 51 has a first bending stiffness set based on a load in the Y direction applied to the flange portion 30b via the liquid composition contained in the cylinder chamber 29a. The second portion 52 is set based on a load in the Y direction applied to the flange portion 30b, and has a second bending rigidity smaller than the first bending rigidity.

  The second portion 52 is formed thinner than the first portion 51. More specifically, the surface 52a on the + Y side of the second portion 52 is disposed on the −Y side of the surface 51a on the + Y side of the first portion 51. The −Y side surface 52b of the second portion 52 is disposed on the + Y side of the −Y side surface 51b of the first portion 51.

  The second moment of area of the second portion 52 whose load direction is the Y direction is set smaller than the second moment of area of the first portion 51 whose load direction is the Y direction. Accordingly, the bending stiffness (second bending stiffness) of the second portion 52 with the Y direction as the load direction, expressed by the product of the Young's modulus and the second moment of area, is defined by the Y direction of the first portion 51 with the load direction. It is smaller than the bending stiffness (first bending stiffness).

  As described above, when the user grips the operation unit 35 of the trigger 31 and pulls it toward the −Y side, the piston 30 moves toward the −Y side, pressurizes the liquid composition in the cylinder chamber 29a, and pressurizes the nozzle. It is ejected from the member 26.

  As the trigger 31 of the present embodiment, as shown in FIG. 4, the operation area has the rib 71 extending in the X direction, does not have the rib extending in the Z direction, and has a lower bending rigidity than the connection area. Alternatively, as shown in FIG. 12, the operation area may have a rib 71 extending in the X direction and a rib 72 extending in the Z direction, and have a bending rigidity equivalent to that of the connection area. .

  At this time, the second portion 52 of the flange portion 30b is displaced to the + Y side by elastic deformation as shown in FIG. 11 due to a reaction force (load) caused by pressurization of the liquid composition in the cylinder chamber 29a. Although the first portion 51 also elastically deforms to the + Y side due to the reaction force caused by the pressurization of the liquid composition, it is smaller than the elastic deformation of the second portion 52 and can be ignored. The elastic deformation in is not mentioned.

  The amount of elastic deformation of the second portion 52 when the trigger 31 is pulled toward the −Y side changes according to the speed at which the operation portion 35 of the trigger 31 is pulled and the amount of the liquid composition ejected from the nozzle member 26. The second portion 52 is elastically deformed by a reaction force corresponding to the pressing force while the pressing force enough to be ejected from the nozzle member 26 is applied to the liquid composition.

  Then, when the trigger 31 is completely pulled out, the pressurization to pressurize the liquid composition in the cylinder chamber 29a accompanying the movement of the piston 30 on the −Y side is stopped. On the other hand, when the liquid pressure in the cylinder chamber 29a decreases due to the stoppage of the pressurization to the liquid composition pressurization, the second portion 52 has an elastic restoring force at which the elastic deformation is released, as indicated by an arrow in FIG. A force is generated to pressurize the liquid composition in the cylinder chamber 29a.

  In other words, the second portion 52 temporarily stores by elastically deforming the force applied to the operation unit 35 as a source, and transmits the stored force as an elastic restoring force for releasing the elastic deformation, and the cylinder chamber 29a Function as a transmission unit for generating a force for pressurizing the liquid composition of the present invention.

  As described above, also in the trigger type ejector 1 of the present embodiment, the same operation and effect as those of the trigger type ejector 1 of the first embodiment can be obtained.

  As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but it is needless to say that the present invention is not limited to such examples. The shapes, combinations, and the like of the constituent members shown in the above-described examples are merely examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

  For example, in the first embodiment, the configuration in which the operation region of the trigger 31 has the rib 71 extending in the X direction and does not have the rib extending in the Z direction and has a lower bending rigidity than the connection region is described. It is not limited to. As the trigger 31, for example, as shown in FIG. 13, a configuration in which a thin portion 61 a having a small thickness is provided in a part of the side wall 61 near the connecting portion 31 </ b> C may be used. In this configuration, when the trigger 31 is pulled to the -Y side, the thin portion 61a is deformed so as to be locally bent. Therefore, when the trigger 31 is pulled, the angular velocity θ1 of the operation area becomes larger than the angular velocity θ2 of the connection area, so that the operation area of the trigger 31 including the operation section 35 is more deformed than the connection area including the connection section 31C. Becomes larger and is displaced relatively to the −Y side of the connection region. That is, the elastic deformation of the operation area generated during the operation of pulling the trigger 31 relatively displaces the connection area to the + Y side. As a result, after the trigger 31 is pulled, the piston 30 can be moved to the −Y side via the connecting portion 31C by the elastic restoring force that releases the elastic deformation of the operation area to pressurize and eject the liquid composition. it can.

  DESCRIPTION OF SYMBOLS 1 ... Trigger type ejector (ejector), 2 ... ejector, 3 ... reciprocating pump (pump), 21 ... container, 29 ... cylinder, 29a ... cylinder chamber, 30 ... piston, 30a ... shaft part, 30b ... flange part (Second connecting portion, transmitting portion), 30c: sliding portion, 31: trigger (trigger lever), 31C: connecting portion, 35: operating portion, 63: recess, 70a: first rib, 70b: second rib, 71 ... rib (first rib)

Claims (11)

An ejector comprising an ejection device for ejecting a liquid composition contained in a container,
The ejection device,
A pump for sucking and pumping the liquid composition from within the container by operating an operation unit on a trigger lever,
The pump is
A cylinder that opens toward the jetting direction,
A piston that forms a cylinder chamber between the cylinder and the cylinder, and slides along the inner peripheral surface of the cylinder to pressurize the liquid composition in the cylinder chamber.
A transmission unit that transmits a force applied to the operation unit and generates a force that pressurizes the liquid composition in the cylinder chamber.
The transmission unit is relatively displaced in a direction opposite to a direction in which the piston presses the liquid composition with respect to the operation unit by elastic deformation generated during an operation of pulling the trigger lever, and the trigger lever A pressure force for pressurizing the liquid composition in the cylinder chamber with an elastic restoring force for releasing the elastic deformation after the pressure is removed.   The ejector according to claim 1, wherein the transmission unit includes a connection portion of the trigger lever with the piston.   3. The bending rigidity of the operation region including the operation portion of the trigger lever in the sliding direction of the piston is smaller than the bending rigidity of the connection region of the trigger lever including the connection portion in the sliding direction. 4. The ejector as described. The trigger lever is formed in a rectangular frame shape having a depression opened in a direction to press the liquid composition,
In the trigger lever, the connection region has a first rib portion extending in a short side direction of the rectangular frame and a second rib portion extending in a long side direction in the depression,
The ejector according to claim 3, wherein the operation region has the first rib portion and does not have the second rib portion.   The said trigger lever is rockable about the axis orthogonal to the sliding direction of the said piston, The distance of the said axis and the said operation part is larger than the distance of the said axis and a connection part. The ejector according to any one of claims 4 to 7.   The angular velocity of the operation section around the axis when the liquid composition is pressurized is θ1, and the angular velocity of the connection section around the axis is θ2, wherein the relationship of θ1> θ2 is satisfied. Spouter. The ratio (θ1 / θ2) of the angular velocity θ1 of the operating section to the angular velocity θ2 of the connecting section is
The ejector according to claim 6, which satisfies the relationship of 1 <(θ1 / θ2) <3. A shaft portion connected to the trigger lever on a side opposite to a direction in which the piston pressurizes the liquid composition;
A sliding portion that slides along the inner peripheral surface,
A second connecting portion radially connecting the shaft portion and the sliding portion,
The ejector according to claim 1, wherein the transmission unit is at least a part of the second connection unit. The second connecting portion has a first portion having a first bending rigidity in a sliding direction of the piston, and a second portion having a second bending rigidity smaller than the first bending rigidity,
The ejector according to claim 8, wherein the transmission unit is disposed on the second part.   The ejector according to claim 9, wherein the second portion has a smaller thickness in the sliding direction than the first portion.   The ejector according to any one of claims 1 to 10, wherein a single operation of pulling the trigger lever ejects 2 ml or more of the liquid composition.

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