JP5469826B2 - Trigger type liquid dispenser - Google Patents

Description

  The present invention relates to a trigger type liquid ejector that is used by being mounted on a container body that contains a liquid.

  A general trigger type liquid dispenser used for discharging various liquids such as household detergent leads to a trigger lever, a piston / cylinder mechanism that operates by operating the trigger lever, and a liquid suction port and discharge port. A liquid flow path. The liquid channel and the cylinder portion of the piston / cylinder mechanism communicate with each other via a communication path, and a check valve for controlling the flow of the liquid is disposed in the liquid channel. The check valve is composed of two members. When the inside of the cylinder is pressurized by the pulling operation of the trigger lever, the check valve on the liquid suction side shuts off the liquid flow path, while the reverse side on the discharge side A stop valve opens the liquid flow path to the discharge side. On the other hand, when the pressure inside the cylinder part becomes negative due to the return from the trigger lever pull position, the check valve on the discharge side shuts off the liquid flow path, while the check valve on the suction side sucks the liquid flow path. It is provided so as to open the side (see, for example, Patent Document 1).

  On the other hand, a check valve in which a discharge-side check valve and a suction-side check valve are formed of a single member has been proposed as in the technique described in Patent Document 2. This check valve is provided with a flange part through a rod-like part below the valve seat of the discharge-side check valve, a coiled compression spring is suspended from the lower surface of this flange part, and a suction-side check valve is provided at the lower end thereof. A valve disc is provided. For this reason, since the pressure when the inside of a cylinder part is pressurized is also applied to the flange part, the check valve on the discharge side becomes difficult to function. In particular, in the above structure, since the coiled compression spring must be shortened, it is difficult to ensure elasticity, and the check valve on the discharge side is moved up and down by the expansion and contraction of the coiled compression spring of the check valve on the suction side. There is a risk of being.

  Further, the technique described in Patent Document 3 employs an inverted skirt-shaped elastic discharge valve body in which the vertical movement is fixed at the rod portion as a check valve on the discharge side, and an intermediate portion having a bent portion at the lower end portion of the rod portion. An integrally formed valve is proposed in which a spring plate is provided and a suction-side valve element is provided at the lower end thereof. However, in this integrally molded valve, the reverse skirt-shaped elastic discharge valve body does not move up and down in the reverse skirt-shaped part, and only a part of the mortar-shaped reverse skirt-shaped elastic part is bent and deformed when the valve is open. Therefore, a force sufficient to bend and deform the reverse skirt-like portion is required, and the pulling force may increase. Moreover, since the reverse skirt-shaped peripheral edge portion is in contact with the inner wall of the vertical cylinder at an acute angle, there is also a problem that foreign matter is easily caught.

  In this way, in the conventional integrated valve, if the elastic force that makes it difficult to move or deform the valve on the discharge side in the closed state is given, the pulling force of the trigger becomes high, and the deformation and movement are easy. Then, the closed state of the valve is insufficient and there is a problem of liquid leakage. When balancing the trigger pull force and valve opening / closing in this way, there is a problem that the mutual influence of the valve opening / closing operation of the discharge side check valve and the suction side check valve cannot be eliminated. It was.

JP 2006-320845 A Japanese Unexamined Patent Publication No. 2000-70788 JP-A-10-151384

  The present invention has been made in view of the above problems, and provides a trigger type liquid discharger that can suppress the mutual influence of the valve opening and closing operations of the check valve on the discharge side and the check valve on the suction side. Objective.

  The present invention includes a trigger lever, a piston / cylinder mechanism that operates by operating the trigger lever, and a liquid channel that leads to a liquid discharge port and a suction port, and the liquid channel and the cylinder of the piston / cylinder mechanism A trigger-type liquid ejector in which a check valve for controlling the flow of liquid is arranged in the liquid flow path, and the check valve includes a plurality of check valves. A linear first elastic portion having a bent portion, a suction side valve portion connected to one end side of the first elastic portion, and a discharge side valve portion on the other end side of the first elastic portion. There is provided a trigger type liquid ejector that is provided as a single member having a second elastic portion that is connected through the first elastic portion, and in which the spring coefficient of the first elastic portion is smaller than the spring coefficient of the second elastic portion. This achieves the above object.

  According to the trigger type liquid discharger of the present invention, since the mutual influence of the valve opening and closing operations of the check valve on the discharge side and the check valve on the suction side can be suppressed, there is no trouble such as a heavy pulling operation of the trigger lever. In addition, the liquid can be discharged well.

The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 is a schematic view showing a cross section according to a first embodiment of a trigger type liquid discharger (hereinafter also referred to as a discharger) of the present invention.

  As shown in FIG. 1, the discharge device 1 of the present embodiment includes a trigger lever 2, a piston / cylinder mechanism 3 that is operated by operating the trigger lever 2, and a liquid that communicates with a liquid discharge port 131 and a suction port 151 described later. And a flow path 4. The cylinder portion 31 of the piston / cylinder mechanism 3 and the liquid flow path 4 are communicated with each other via a communication path 43. A check valve body 5 that controls the flow of the liquid is disposed in the liquid flow path 4. Hereinafter, the discharger 1 will be described in detail.

  The discharger 1 is configured by incorporating various components, which will be described later, into a discharger body 10 that forms a skeleton. Inside the discharger main body 10, a pipe line 11 having a horizontal pipe part 111 and a vertical pipe part 112 communicating with each other via a communication path 110 is provided. A spin element 12 is incorporated on the front end side of the horizontal tube portion 111, and a nozzle member 13 having a discharge port 131 is incorporated at the tip of the spin element 12. The vertical pipe portion 112 incorporates an intake 14, and a suction pipe 15 having a suction port 151 at the tip is inserted into a lower end portion of the intake 14. With these configurations, the liquid flow path 4 communicating with the liquid discharge port 131 and the suction port 151 is formed.

  At the upper end of the pipe part 141 of the intake 14 is provided a step 142 for the valve seat in which the inner diameter of the pipe part 141 is widened. In addition, an inward flange portion 143 for a valve seat projects inward from an intermediate portion of the pipe portion 141 of the intake 14. As will be described later, the step portion 142 functions as a valve seat of the discharge side valve portion 54 of the check valve body 5, and the flange portion 143 functions as a valve seat of the suction side valve portion 53 of the check valve body 5. The through hole 144 constituting the communication path 43 is provided between the stepped portion 142 and the flange portion 143. In the following description, the step portion 142 and the flange portion 143 are also referred to as a valve seat. The lower end portion of the intake 14 is provided with a fitting tubular portion 145 having a cross section wider than that of the tube portion 141, and an intake hole 146 is provided on the upper surface portion of the tubular portion 145. Further, an outward flange portion 147 is provided on the outer periphery of the tubular portion 145. A cap 6 having an opening 61 provided on the top surface portion and a screw provided on the inner peripheral surface is inserted into the cylindrical portion 145, and the cap 6 is supported by the flange portion 147.

  A cylinder member 311 constituting the cylinder portion 31 of the piston / cylinder mechanism 3 is incorporated in a recess 101 provided in front of the body portion of the discharger body 10. A piston 32 is slidably incorporated in the cylinder member 311. The communication passage 43 that allows the inside of the cylinder part 31 and the inside of the liquid flow path 4 to communicate with each other is provided so as to penetrate the inner surface of the cylinder member 311, the inner surface of the recess 101, and the pipe part 141 of the intake 14. The peripheral wall 312 of the cylinder member 311 is provided with an intake hole 313 through which outside air is sucked when the piston 32 is pushed. A gap is provided between the peripheral wall portion 312 of the cylinder member 311 and the peripheral wall portion 102 of the concave portion 101, and the peripheral wall portion 102 is provided with an intake hole 103 that communicates with the gap. In a state where the piston 32 is pushed in, the intake holes 146, 106 and 313 are communicated with each other through a gap. The front end portion of the piston 32 is engaged with the back side of the trigger lever 2 and can slide back and forth in conjunction with the trigger lever 2.

  An elastic member 16 is incorporated above the horizontal tube portion 111 of the discharger body 10. The elastic member 16 is provided with a bearing portion 161 and an elastic portion 162 so as to hang down on both sides of the horizontal tube portion 111. The elastic portion 162 is provided with a locking convex portion 163 that projects obliquely downward.

  The trigger lever 2 that operates the piston 32 is provided with a shaft portion 21 that is a horizontal rotation shaft of the trigger lever 2, and this shaft portion 21 is pivotally supported by the bearing portion 161 of the elastic member 16. Moreover, the recessed part 22 is provided in the both sides of the trigger lever 2, and the latching convex part 163 of the elastic member 16 is latched by this recessed part 22. As shown in FIG. As described above, the front end portion of the piston 32 is engaged with the back surface portion of the trigger lever 2.

  The check valve body 5 arranged in the liquid flow path 4 has a linear first elastic portion 51 having a plurality of generally wave-shaped bent portions and expandable / contractable, and direction guidance to one end side of the first elastic portion 51. One member (integral) having a suction side valve portion 53 provided continuously through the portion 52 and a second elastic portion 55 provided continuously through the discharge side valve portion 54 on the other end side of the first elastic portion 51. Molded parts).

  In the present embodiment, the direction guiding portion 52 is provided in the form of a flange along the inner peripheral surface of the liquid flow passage 4 (the pipe portion 142 of the intake 14) between the first elastic portion 51 and the suction side valve portion 53. ing. The suction side valve portion 53 is formed in a generally hemispherical shape having a dome shape on the suction side so as to close the flange portion 143 of the pipe portion 141 of the intake 14. The discharge-side valve portion 54 is formed in a disk shape that extends in a direction perpendicular to the axial direction of the vertical tube portion 112 and closes the step portion 142. The second elastic portion 55 has two linear portions with a narrowed middle portion in the vertical direction. The upper end portion of the second elastic portion 55 reaches the upper end portion of the vertical tube portion 111.

  In the check valve body 5, the second elastic part 54 is positioned above the discharge side valve part 55 in the vertical pipe part 112, and the step part 142 of the pipe part 141 of the intake 14 serves as the valve seat of the discharge side valve part 55. The flange portion 143 is incorporated in the discharger main body 10 so as to function as a valve seat for the suction side valve portion 53. Specifically, the check valve body 5 is incorporated so that the first elastic portion 51 is disposed in a region including the communication path 43 formed in the vertical pipe portion 112 on the front side. In this assembled state, the upper end portion of the first elastic portion 51 is disposed on the discharge side (upward) with respect to the communication passage 43, and the lower end portion of the first elastic portion 51 is on the suction side (downward) with respect to the communication passage 43. Be placed.

  The check valve body 5 is provided with a spring coefficient of the first elastic portion 51 smaller than that of the second elastic portion 55. The ratio of the spring coefficient of the first elastic part 51 to the spring coefficient of the second elastic part 55 is preferably 1: 5 to 1: 100, more preferably 1:10 to 1:50. The spring coefficient of the first elastic portion 51 is preferably 0.01 to 1 N / mm, and more preferably 0.05 to 0.5 N / mm. Further, the spring coefficient of the second elastic portion 55 is preferably 0.05 to 10 N / mm, and more preferably 1 to 5 N / mm. Here, the spring coefficient of the first elastic portion 51 is determined by applying a pressing force by a push-pull gauge (CE N92 manufactured by A & D Corporation) when one end of the first elastic portion 51 is fixed and the other end is displaced by 2 mm. Calculated by measuring. Similarly, the spring coefficient of the second elastic portion 55 was calculated from the pressing force measured with a push-pull gauge when one end was fixed and the other end was displaced by 2 mm. In addition, if the form of a 1st elastic part and a 2nd elastic part satisfy | fills the conditions of the said spring coefficient, there will be no restriction | limiting in particular in the form. In the present embodiment, the first elastic portion 51 is generally formed in a wave shape, but the shape is not limited as long as it can be expanded and contracted, and may be in a coil shape (spiral shape).

  The first elastic part 51 of the check valve body 5 is provided so that the spring coefficient of the first elastic part 51 is smaller than the spring coefficient of the second elastic part 55 as described above. Therefore, when the piston 32 is pushed in by the pulling operation of the trigger lever 2 and the inside of the cylinder part 31 is pressurized, the first elastic part 51 extends and the discharge side valve part 54 rises slightly to raise the liquid flow path. 4 is opened, but the suction side valve portion 53 is kept seated on the valve seat 143 by the pressure from the cylinder portion 31, so the suction side of the liquid flow path 4 is blocked.

  When the trigger lever 2 is loosened, the trigger lever returns to its original position and the piston 32 returns to the front due to the elastic force of the elastic portion 162 of the elastic member 16, so that the inside of the cylinder portion 31 becomes negative pressure. . When the inside of the cylinder part 31 becomes negative pressure, the suction side valve part 53 slightly rises from the valve seat 143 and the suction side of the liquid flow path 4 is opened, but the discharge side is caused by contraction of the first elastic part 51. Since the valve portion 54 is kept seated on the valve seat 142, the discharge side of the liquid flow path 4 is blocked. Thus, since the mutual influence of the valve opening / closing operation | movement with the suction side check valve part 53 and the discharge side check valve part 54 is suppressed, it can suppress that the pulling operation of the trigger lever 2 becomes heavy.

  In the check valve body 5, a direction guiding projection 52 is interposed between the first elastic portion 51 and the suction side valve portion 53, and the direction guiding projection 52 is stably moved up and down along the liquid flow path 4. Therefore, when the liquid acts on the suction side valve portion 53 as the pressure in the cylinder portion 31 fluctuates, the suction side valve portion 53 is also stably moved up and down. Therefore, the opening and closing of the liquid flow path 4 by the suction side valve portion 53 is performed smoothly, and it is possible to further suppress an increase in the pulling operation of the trigger lever 2.

  In the ejector 1, grooves (not shown) are provided on the outer peripheral surface of the cylindrical portion 121 of the spin element 12 and the inner peripheral surface of the cylindrical portion 132 of the nozzle member 13, respectively. The flow path from the horizontal tube portion 111 to the discharge port 131 of the nozzle member 13 is continuous.

  In the discharger 1, a nozzle tip 133 is attached to the nozzle member 13 via a hinge so as to close the front of the discharge port 131. The nozzle chip 133 is provided with a plurality of rod-shaped portions 134 that extend toward the central axis of the discharge port 13. These rod-shaped portions 134 not only narrow the bubble discharge area by colliding liquid ejected from the discharge port 131 but are discharged in the form of finer bubbles.

  A shroud 7 is attached to the discharger body 10 in order to cover the assembled state of the above components and to improve the appearance of the discharger 1.

  The discharger 1 is attached to the container body by screwing the cap 6 into the mouth of the container body with the suction pipe 15 inserted into the container body (not shown) containing the liquid. In this state, when the pulling operation of the trigger lever 2 is performed, the piston 32 is pushed rearward in the discharger main body 10, and the internal volume of the cylinder part 31 is reduced and pressurized. At this time, since the outside air is taken into the container body through the intake holes 313, 103, and 146, deformation of the container body is prevented.

  In the dispenser 1 of the present embodiment, when the liquid is discharged, the trigger lever 2 is operated to operate the piston 32, and when the pressure in the cylinder part 31 is increased or decreased, the check arranged in the liquid flow path 4 is performed. As described above, the valve body 5 has a reduced pulling operation of the trigger lever 2 because the mutual influence of the valve opening and closing operations of the suction side check valve portion 53 and the discharge side check valve portion 54 is suppressed. In addition, the liquid can be discharged well.

  Next, 2nd and 3rd embodiment of this invention is described with reference to FIG.2 and FIG.3. In the following, characteristic portions of these embodiments will be described, and description of portions common to the first embodiment will be omitted. Therefore, the description in the first embodiment is appropriately applied to a portion that is not particularly described.

  In the discharge device 1A of the second embodiment shown in FIG. 2, the elastic member for returning the trigger lever to the original position is formed integrally with the trigger lever, and the concave portion provided in the discharge device body is the cylinder portion. . That is, the discharger 1A of the present embodiment is provided with the elastic portion 23 so as to extend rearward from both side portions of the trigger lever 2A. The rear end portion of the elastic portion 23 is locked to both side portions of the main body of the discharger body 10A. In the discharger 1A, the concave portion 101 provided in front of the trunk portion of the discharger main body 10A is used as it is as a cylinder part.

  As described above, since the trigger lever and the elastic member are integrated in the discharger 1A and the cylinder part is directly provided in the discharger main body, the number of parts can be reduced, and the assembly process can be reduced. According to the discharger 1A, a discharger having the same effect as the discharger 1 of the first embodiment can be manufactured at low cost.

  In the discharge device 1B of the third embodiment shown in FIG. 3, a check valve body that controls the flow of liquid in the liquid flow path is arranged in the horizontal tube portion of the liquid flow path, and the check valve body and spin The element is integrally molded. In addition, as in the case of the discharge device 1A of the second embodiment, the discharge device 1B has an elastic member that returns the trigger lever to its original position, and is integrally formed with the trigger lever. It is said that. Furthermore, in the discharger 1B, the intake is integrally provided in the discharger body.

  In the discharge device 1B of the present embodiment, the check valve body 5B is a linear first that has a plurality of generally wave-shaped bent portions and can be expanded and contracted, like the check valve body 5 of the first embodiment. The elastic part 51, the suction side valve part 53 connected to one end side of the first elastic part 51 via the direction guiding part 52, and the discharge side valve part 54 to the other end side of the first elastic part 51. It has the 2nd elastic part 55 provided in a row. The check valve body 5B further includes a cylindrical spin element portion 56 that functions as a spin element at the end of the second elastic portion 55, and is provided as a single member.

  In the ejector 1 </ b> B, the cylindrical portion 132 of the nozzle member 13 is fitted to the spin element portion 56. Grooves (not shown) are provided on the outer peripheral surface of the spin element portion 56 and the inner peripheral surface of the cylindrical portion 132 of the nozzle member 13, respectively. The liquid flow path 4 to the discharge port 131 of the nozzle member 13 is continuous.

  In the discharger 1B, the opening edge part of the communication path 110 of the horizontal pipe part 111 and the vertical pipe part 112 of the discharger main body 10B is used as the valve seat of the suction side valve part 53 of the check valve body 5B. In addition, a stepped portion 113 is provided with the inner diameter expanded at the distal end portion of the horizontal tube portion 111, and this stepped portion 113 serves as a valve seat of the discharge side valve portion 54.

  Further, in the discharger 1B, a concave portion 101 provided so as to tilt forward is formed as a cylinder part 31 in front of the body part of the discharger main body 10B. A communication passage 43 that connects the cylinder portion 31 and the liquid flow passage 4 is provided in the horizontal tube portion 111. In a state where the check valve body 5B is incorporated in the discharger body 10B, the front end portion of the first elastic portion 51 is disposed on the discharge side (front side) with respect to the communication passage 43, and the rear end portion of the first elastic portion 51 Is arranged on the suction side (rear side) with respect to the communication path 43.

  Further, in the discharger 1B, the intake is integrally formed with the discharger body 10B, and the suction pipe 6 is directly attached to the discharger body 10B.

  As described above, in the discharge device 1B, the check valve body that controls the flow of the liquid in the liquid flow path is arranged in the horizontal tube portion of the liquid flow path, and the check valve body and the spin element are integrally formed. In addition, since the intake is integrally formed with the discharger body 10B, the number of parts can be further reduced, and the assembly process can be reduced. According to the discharger 1B, a discharger having the same effect as the discharger 1A of the second embodiment can be manufactured at a lower cost.

The dispenser of the present invention is not limited to the above embodiment.
For example, in the above embodiment, the nozzle tip 133 is attached to the nozzle member 13 via the hinge so as to close the front of the discharge port 131, but the nozzle tip 133 is not necessarily provided, and the discharge port 131 of the nozzle member 13 is not necessarily provided. In addition, the cylindrical portion on the discharge side can be formed in various forms.

  The discharger of the present invention is not particularly limited in the liquid to be discharged, but in addition to cleaning agents (for residential use and clothing), bleaching agents, deodorants, pastes, hair styling agents, cosmetics and other liquids It is particularly preferably used for discharge.

It is a sectional side view which shows 1st Embodiment of the trigger type liquid discharger of this invention. It is a sectional side view which shows 2nd Embodiment of the trigger type liquid discharger of this invention. It is a sectional side view which shows 3rd Embodiment of the trigger type liquid ejector of this invention.

Explanation of symbols

1, 1A, 1B Trigger type liquid discharger (discharger)
10, 10A, 10B Discharger body 2, 2A Trigger lever 3 Piston / cylinder mechanism 31 Cylinder part 32 Piston 4 Liquid flow path 43 Communication path 5, 5A, 5B Check valve body 51 First elastic part 52 Direction guide part 53 Suction Side valve portion 54 Discharge side valve portion 55 Second elastic portion 6 Cap

Claims (4)

A trigger lever; a piston / cylinder mechanism that is operated by operating the trigger lever; and a liquid flow path that leads to a liquid discharge port and a suction port.
Trigger-type liquid discharge in which the liquid flow path and the inside of the cylinder part of the piston / cylinder mechanism are communicated with each other through a communication path, and a check valve body is disposed in the liquid flow path. A vessel,
The check valve body includes a linear first elastic portion having a plurality of bent portions that can be expanded and contracted, a suction side valve portion continuously provided on one end side of the first elastic portion, and a first elastic portion. Provided with one member having a second elastic portion connected to the end side via a discharge side valve portion;
The spring coefficient of the first elastic part is smaller than the spring coefficient of the second elastic part;
A first elastic portion of the check valve body is disposed in a region including the communication path in the liquid flow path, and the suction side valve portion is disposed on a liquid suction side in the liquid flow path;
When the inside of the cylinder part is pressurized, the suction side valve part blocks the liquid flow path, and the second elastic part elastically deforms so that the discharge side valve part moves the liquid flow path to the discharge side. Open,
When the inside of the cylinder part becomes negative pressure, the discharge side valve part shuts off the liquid flow path, and the first elastic part is elastically deformed so that the suction side valve part becomes the suction side of the liquid flow path. Is provided to open
A trigger type liquid ejector in which a ratio of a spring coefficient of the first elastic part to a spring coefficient of the second elastic part is 1: 5 to 1: 100 . 2. The trigger type liquid ejector according to claim 1 , wherein a spring coefficient of the first elastic portion is 0.01 to 1 N / mm, and a spring coefficient of the second elastic portion is 0.05 to 10 N / mm .   The said suction side valve body is continuously provided in the one end side of the said 1st elastic part through the direction guidance protrusion which consists of a protrusion or flange along the inner peripheral wall of the said liquid flow path. Trigger type liquid dispenser. The trigger type liquid discharger according to any one of claims 1 to 3, wherein the check valve body is disposed in an intake pipe portion incorporated in a vertical pipe portion of a pipe line forming the liquid flow path. .

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