JP2013121378A - Nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle capable of preventing dripping by a simple structure.SOLUTION: The nozzle 23 to be provided on a liquid dispenser 1 for supplying liquid in a foam to discharge the liquid foam includes: a body portion 41 having a communicating hole 42 through which the liquid is passed; a planar section 43 formed at an end of the body portion 41, to which the communicating hole 42 is opened; and a projecting portion 44 provided around the communicating hole 42 on the surface of the planar section 43 and inclined at an inclination allowing the discharged liquid foam to move to a part of the planar section 43, the projecting portion including a surface portion 45 formed at a part thereof to increase the surface area.

Description

  The present invention relates to a nozzle used in a liquid dispenser that supplies a foam-like liquid.

  As a device for supplying an appropriate amount of liquid from a nozzle that opens downward, a liquid dispenser used for supplying liquid soap in public facilities such as public toilets, hospitals, and restaurants is known (for example, Patent Document 1). reference). Such a liquid dispenser that supplies soap is discharged from the nozzle as a foam by mixing gas with soap in order to improve the convenience of cleaning the soap to be supplied and reducing the amount of soap used. Techniques for doing this are also known.

  However, in a liquid dispenser that supplies soap in the form of foam, after discharging the foamed soap from the nozzle, the foamed soap remains at the tip of the nozzle, and so-called liquid dripping, in which the remaining soap drops over time. There was a problem that it occurred. Therefore, as a device for preventing liquid sag, a technique is known in which a liquid sag prevention device for increasing the inner area of the communication hole through which the soap of the nozzle passes is provided in the communication hole of the nozzle (see, for example, Patent Document 2). ).

JP 2007-098145 A Special table 2011-521755 gazette

  The nozzle used for the liquid dispenser described above has the following problems. That is, in the liquid dispenser described above, a liquid dripping prevention device is provided in the nozzle in order to prevent liquid dripping, and a process of assembling the liquid dripping prevention device in the communication hole of the nozzle is required. Moreover, the structure of the liquid dripping prevention device is complicated. The liquid dripping prevention device has a problem that the structure is complicated and a process for assembling the communication hole is required, so that the manufacturing cost of the liquid dispenser increases.

  Accordingly, an object of the present invention is to provide a nozzle capable of preventing liquid dripping with a simple configuration.

  In order to solve the above problems and achieve the object, the nozzle of the present invention is configured as follows.

  As one aspect of the present invention, a nozzle that is provided in a liquid dispenser that supplies liquid in the form of foam and that discharges the foam-like liquid includes a body portion in which a communication hole through which the liquid passes is formed, A planar portion that is formed at an end portion of the body portion, the opening of the communication hole, and a surface of the planar portion, provided around the communication hole, and the discharged bubble-like liquid is a flat surface; And a projecting portion having a part that is inclined at a movable inclination angle and a surface part that increases the surface area is formed on a part of the part.

  According to the present invention, it is possible to provide a nozzle capable of preventing liquid dripping with a simple configuration.

Explanatory drawing which shows typically the structure of the liquid dispenser which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the structure of the supply apparatus used for the liquid dispenser. The perspective view which shows the structure of the nozzle used for the supply apparatus. The side view which shows the structure of the nozzle. The bottom view which shows the structure of the nozzle. Sectional drawing which expands and shows the structure of the nozzle. The perspective view which shows the structure of the nozzle used for the liquid dispenser which concerns on the 2nd Embodiment of this invention. The perspective view which shows the structure of the nozzle used for the liquid dispenser which concerns on the 3rd Embodiment of this invention.

(First embodiment)
Hereinafter, the configuration of the liquid dispenser 1 using the nozzle 23 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

  FIG. 1 is an explanatory view schematically showing a configuration of a liquid dispenser 1 according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view showing a configuration of a supply device 11 used in the liquid dispenser 1, and FIG. FIG. 4 is a side view showing the configuration of the nozzle 23, FIG. 5 is a bottom view showing the configuration of the nozzle 23, and FIG. 6 is the configuration of the nozzle 23. It is sectional drawing which expands and shows.

  As shown in FIG. 1, the liquid dispenser 1 includes an outer member 10, a supply device 11, a drive mechanism 12, a sensor 13, a control unit 14, and a power supply unit 15. The liquid dispenser 1 is provided, for example, in a restroom of a public facility, and is formed so that an appropriate amount of liquid such as foam soap can be supplied. For example, the liquid has a viscosity of 1 to 80 mPa · s at 30 ° C.

  The outer member 10 houses the supply device 11, the drive mechanism 12, the sensor 13, the control unit 14, and the power supply unit 15, and is formed so that a user's hand can be inserted below the supply device 11. The outer member 10 is formed so as to be fixable to a place where the liquid dispenser 1 is installed, for example, a washstand or a wall surface.

  As shown in FIGS. 1 and 2, the supply device 11 is a so-called cartridge formed so as to be detachable from the outer member 10 and capable of supplying a liquid. The supply device 11 includes a tank 21, a supply unit 22, and a nozzle 23. The tank 21 is formed so as to be able to store a liquid liquid therein. The tank 21 is fixed to the supply means 22.

  The supply unit 22 includes a fixed body 31, a movable body 32, a pump unit 33, and a mixing unit 34. The supply means 22 is a pump formed so that the liquid in the tank 21 can be discharged from the nozzle 23 as a foam-like liquid.

  The fixed body 31 is connected to the tank 21. The fixed body 31 is formed so that the pump part 33 and the mixing part 34 can be accommodated therein.

  The movable body 32 has a nozzle 23 integrally formed at the tip thereof. The movable body 32 is formed so as to be detachable from the fixed body 31. Specifically, the movable body 32 is formed so as to be able to reciprocate in a direction away from and in contact with the fixed body 31. The movable body 32 is formed so that the pump part 33 can be driven. The movable body 32 is driven in the direction approaching the fixed body 31 by the drive mechanism 12. The movable body 32 is configured to be movable in a direction away from the fixed body 31 by an urging member described later in the pump unit 33 after being driven toward the fixed body 31 by the drive mechanism 12.

  The pump part 33 is formed so that liquid can be pumped by the reciprocating motion of the movable body 32. The pump unit 33 includes, for example, two valve bodies therein, a pump chamber that temporarily stores liquid from the tank, and an urging member that urges the valve body and the movable body 32. Yes.

  When the supply unit 22 is in a standby state, the pump unit 33 is restricted from moving liquid by the two valve bodies. The pump unit 33 is formed so that when the movable body 32 moves in a direction away from the fixed body 31, one valve body is opened, and a predetermined amount of liquid in the tank 21 is movable in the pump chamber. . The pump unit 33 opens the other valve body when the movable body 32 moves in the direction approaching the fixed body 31, and the liquid in the pump chamber can be mixed with air by the mixing unit 34. The liquid mixed with air is formed so as to be capable of being pumped to the nozzle 23.

  The mixing unit 34 is formed so that air can be mixed with the liquid in the pump chamber when the other valve body of the pump unit 33 is in the open state. The mixing unit 34 mixes air with the liquid to form a foamy liquid.

  The nozzle 23 is made of, for example, a resin material. The nozzle 23 is formed integrally with the movable body 32. As shown in FIGS. 1 to 6, the nozzle 23 includes a cylindrical portion 41 having a communication hole 42 continuous with the pump portion 33 therein, and a flat portion formed at the tip of the cylindrical portion 41. 43 and a projecting portion 44 formed on the surface of the flat portion 43 and having the communication hole 42 at the center thereof.

  The nozzle 23 is formed integrally with a body portion 41, a flat surface portion 43, and a protruding portion 44. The nozzle 23 forms a foam-like liquid flow path from the pump part 33 to the outside and a foam-like liquid discharge port by the communication hole 42 of the body part 41.

  The body 41 is formed integrally with the movable body 32. The communication hole 42 is disposed with the same axis as that of the body portion 41, and is formed with different diameters on the pump chamber side and the end portion. For example, the communication hole 42 is continuously formed by a truncated cone-shaped hole having a large diameter on the fixed body 31 side, a small diameter opening on the tip side at the center of the protruding portion 44, and gradually reducing the diameter. .

  The flat surface portion 43 and the projecting portion 44 constitute an end surface of the body portion 41. The planar portion 43 and the projecting portion 44 are formed so that their surface areas are wider than the opening at the end of the communication hole 42, that is, the opening area that opens to the projecting portion 44 of the communication hole 42. The surface area of the flat portion 43 and the projecting portion 44 is preferably 5 times or more the opening area of the end portion of the communication hole 42, and more preferably 10 times or more.

  The protruding portion 44 is provided so as to protrude from the flat portion 43, and a surface portion 45 that increases the surface area is formed on the surface thereof. Further, the protrusion 44 is formed with a predetermined inclination angle smaller than 90 degrees, preferably with an inclination angle of 0 degrees or more and 60 degrees or less with respect to the flat surface section 43 from the outer peripheral side to the center side.

  That is, the protrusion 44 is an angle that can hold the liquid by the surface tension of the liquid when the liquid adheres to the surface, and does not move as much as possible along the surface in the gravity direction, The liquid is formed at an angle that allows the liquid to move from the protruding portion 44 to the flat portion 43. Here, the inclination angle of 0 degree indicates a configuration including a flat surface without the protruding portion 44.

  Specifically, the protruding portion 44 is a curved surface that is formed by a part of a spherical surface, whose outer surface is within a predetermined inclination angle, and whose height from the flat surface portion 43 is smaller than its radius. The outer surface of the protrusion 44 is a curved surface. Therefore, the predetermined inclination angle means that the curved surface is approximated to an inclined surface at each position, and the approximated inclined surface (so-called tangential plane). And the flat portion 43.

  The protrusion 44 is formed, for example, such that the height t from the flat portion 43 to the crest of the communication hole 42 and the protrusion 44 is equal to or less than ½ of the radius of the spherical surface forming the curved surface. The protrusion 44 has a radius of 4 mm, for example, and a height t from the flat portion 43 to the crest of the communication hole 42 and the protrusion 44 is 1.7 mm.

  The surface portion 45 is, for example, a plurality of grooves 45a formed in the protruding portion 44 with the same width. Specifically, the surface portion 45 is a plurality of grooves 45 a that are provided radially and equidistantly from the axial center of the protruding portion 44, in the present embodiment, eight grooves 45 a.

  The groove 45 a is provided from the outer surface of the protruding portion 44 to the flat surface portion 43, and connects the outer surface of the protruding portion 44 and a part of the communication hole 42. The groove 45a is formed so that the width of the groove 45a can be contacted with a foam-like or liquid liquid. The groove 45a preferably has such a width that the foamy and liquid liquid attached to the groove 45a is held by the surface tension. The groove 45a is formed with a width of 0.2 mm to 0.5 mm, for example.

  The drive mechanism 12 is disposed in the outer member 10 and is connected to the control unit 14 via the signal line S. The drive mechanism 12 moves the movable body 32 in a direction approaching the fixed body 31 based on an instruction from the control unit 14. For example, the drive mechanism 12 is formed so as to be able to press the end surface of the movable body 32, and is configured to be able to release the pressure after moving the movable body 32 to the fixed body 31 in the proximity direction by a predetermined distance. .

  The sensor 13 is provided on the outer member 10 and is connected to the control unit 14 via the signal line S. The sensor 13 is configured to be able to detect that the user's hand is positioned below the nozzle 23 and to transmit the detected information to the control unit 14.

  The control unit 14 is connected to the drive mechanism 12, the sensor 13, and the power supply unit 15 through the signal line S. The control unit 14 supplies the power supplied from the power supply unit 15 to the drive mechanism 12 and the sensor 13. The control unit 14 is configured to be able to drive the drive mechanism 12 after receiving information detected by the sensor 13.

  The power supply unit 15 includes, for example, a dry battery holder and a dry battery provided in the outer member 10. The power supply unit 15 may be a power cable connected to an external power source such as a commercial power source or a household power source.

  In the liquid dispenser 1 configured as described above, when power is supplied from the power supply unit 15 to the control unit 14, first, power is supplied to the sensor 13, and the sensor 13 can always detect the hand of the user. It becomes. When the user's hand is located below the nozzle 23, the sensor 13 detects that the hand is located and transmits detection information to the control unit 14. Upon receiving the detection information from the sensor 13, the control unit 14 supplies power to the drive mechanism 12 to drive based on the information, and moves the movable body 32 by pressing the movable body 32 toward the fixed body 31 by a predetermined distance. Let

  With the movement of the movable body 32, the pump unit 33 pumps the liquid in the pump chamber. At this time, the pumped liquid is mixed with air by the mixing unit 34 to become a foam. An appropriate amount of the foamy liquid passes through the communication hole 42 in the nozzle 23 and is discharged from the tip of the nozzle 23.

  The drive mechanism 12 that has moved the movable body 32 by a predetermined distance releases the pressure on the movable body 32. In addition, the movable body 32 whose pressure is released moves in a direction away from the fixed body 31 by the urging member of the pump unit 33. At this time, in the pump unit 33, a predetermined amount of liquid is sucked into the pump chamber. As a result, the supply device 11 enters a standby state in which it waits until the next drive mechanism 12 is driven. As described above, in the liquid dispenser 1, when the hand is detected by the sensor 13, the control unit 14 drives the supply unit 22 of the supply device 11 with the drive mechanism 12 to supply the bubble-like liquid from the nozzle 23.

  Next, the liquid in which an appropriate amount is discharged from the tip of the nozzle 23 will be described. When the foam-like liquid is discharged from the communication hole 42 of the nozzle 23 to the external space, it expands slightly due to the difference between the pressure inside the nozzle 23 and the atmospheric pressure.

  In addition, the foamed liquid discharged in this way generates an adsorption force due to surface tension due to intermolecular force (Van der Waals force) that attracts the molecules of the foamy liquid to gather together, and a plurality of bubbles are mutually connected. Adsorb. In addition, the foam-like liquid is continued by a plurality of bubbles.

  The discharged foamy liquid contacts the tip of the protrusion 44 and the surface of the protrusion 44 from a plurality of grooves 45a provided in the protrusion 44, and continuously moves in the direction of gravity. Further, the foam-like liquid is pushed by the foam-like liquid continuously discharged from the communication hole 42, further diffuses from the surface of the protrusion 44 and the groove 45 a to the outer peripheral side of the nozzle 23, and is It touches the part and moves continuously in the direction of gravity.

  When an appropriate amount of the foam-like liquid is discharged from the communication hole 42, most of the weight that cannot be supported by the suction force falls in the direction of gravity, and the foam that has not dropped falls on the flat portion 43 by the suction force. And remain on the surface of the protrusion 44.

  The remaining foam-like liquid is released from the continuous foam, and the tensile force in the direction of gravity received from the dropped foam is released. It further moves gradually to the outer peripheral side, and comes into contact with the flat portion 43 in a wider range than when discharging from the communication hole 42.

  The remaining foam-like liquid is held by the nozzle 23 in a state in which a plurality of bubbles are continuously connected to each other by the mutual adsorption force and in contact with the flat portion 43, the protruding portion 44, and the surface portion 45. As a result, the remaining foamy liquid contacts the tip of the nozzle 23 over a wide area, so that it does not drop from the flat portion 43, the protruding portion 44, and the surface portion 45 due to its own weight, and the flat portion 43, the protruding portion 44, and It is held by the surface portion 45.

  In addition, since the surface portion 45 is formed by a plurality of grooves 45a having a narrow width, the bubble-like liquid increases in contact area and is held by its surface tension, so that the groove 45a. Even if the extending direction is the gravity direction, the movement in the gravity direction in the groove 45a is suppressed.

  Further, the remaining foam-like liquid is in contact with the flat portion 43, the projecting portion 44, and the surface portion 45 even if the bubbles disappear and become liquid as time passes. The protrusion 44 and the groove 45a are held. Further, the liquid liquid has a contact area increased by the groove 45a and is held by its surface tension, thereby suppressing movement in the direction of gravity.

  Further, the foamy or liquid liquid that moves from the flat portion 43 to the protruding portion 44 in the vicinity of the groove 45a or is positioned on the outer surface of the protruding portion 44 in the vicinity of the groove 45a enters the groove 45a by its surface tension. Therefore, the liquid is held in the groove 45a.

  According to the liquid dispenser 1 configured as described above, the flat portion 43 that forms the end surface of the nozzle 23 and a curved surface having a predetermined inclination angle are formed, and the protruding portion 44 in which the groove 45a is formed is provided at the tip thereof. Thus, it is possible to prevent the remaining liquid from sagging with a simple configuration.

  More specifically, the nozzle 23 is formed in a shape that forms a part of a spherical surface within the range of the inclination angle of the protrusion 44 with respect to the plane portion 43. For this reason, when the bubble-like liquid is discharged from the communication hole 42, the nozzle 23 is drawn toward the flow in which the bubble-like liquid is discharged, and passes through the protrusion 44 to the plane portion 43. It is possible to reduce the area in contact with the liquid as much as possible. For this reason, the discharged bubble-like liquid drops with a small amount remaining at the tip of the nozzle 23, and the bubble is well-out, and the amount of liquid remaining in the nozzle 23 can be reduced.

  Further, the nozzle 23 moves the flat portion 43 by the surface tension of the liquid remaining after the discharge, thereby allowing the foam-like liquid to be brought into contact with a larger area than that during the discharge. Since the bubble-like liquid is held by the nozzle 23 in a larger area than that during ejection, the nozzle 23 can prevent the remaining foam-like liquid from dripping, that is, liquid sag.

  The nozzle 23 has a sufficient surface area for holding the liquid by making the surface area of the flat part 43 and the projecting part 44 5 times or more, more preferably 10 times or more the opening area at the projecting part 44 of the communication hole 42. It is possible to secure the liquid, and it is possible to prevent dripping of the liquid as much as possible.

  Protruding part 44 can increase the surface area of flat part 43 and protruding part 44 by providing surface part 45. By making the surface portion 45 into the groove 45a, the liquid located in the groove 45a can be held by its surface tension. The surface 45 can hold the liquid in the groove 45a depending on the width of the groove 45a, and can also raise the liquid by generating a capillary phenomenon by narrowing the width of the groove 45a. .

  The protruding portion 44 is configured such that the height of the protruding portion 44 from the flat portion 43 is equal to or less than ½ of the radius of the spherical surface of the protruding portion 44, so that the inclination angle gradually increases from the tip toward the flat portion 43. Become. As a result, the protruding portion 44 increases the resistance from the middle when the discharged foamy liquid spreads to the outer peripheral side of the nozzle 23 and rises along the surface of the protruding portion 44 toward the flat portion 43 side. By reducing the area in contact with the flat surface portion 43 at the time of discharge as much as possible, it is possible to improve the above-described bubble breakability.

  In addition, it is possible to reduce the resistance of movement of the foam-like liquid by making the protruding portion 44 a curved surface, and it is possible to hold the liquid as much as possible by increasing the surface area. Further, by setting the protrusion 44 to be equal to or less than ½ of the radius of the spherical surface, it is possible to reduce the inclination angle formed by the curved surface, and even if the bubble-like liquid can be prevented from diffusing at the time of discharge. The movement by surface tension becomes possible as much as possible.

  Further, the protruding portion 44 has a configuration in which the inclination angle gradually decreases from the flat portion 43 side toward the tip thereof (the communication hole 42 and the crest portion of the protruding portion 44). For this reason, even if the foam-like liquid adhering to the flat part 43 and the protrusion part 44 moves to the gravity direction along the surface of the protrusion part 44, the nozzle 23 holds the liquid as much as possible by the spherical surface below it. Is possible. Moreover, the moving speed of the foam-like liquid can be reduced. By these things, it becomes possible to reduce the quantity of the liquid which moves to the front-end | tip of the protrusion part 44, and to prevent the dripping of the liquid which moved to the said front-end | tip.

  Furthermore, since the nozzle 23 is formed in a cylindrical shape having a communication hole 42 in the inside thereof, and the protruding portion 44 is integrally formed on the flat surface portion 43 of the end surface, the nozzle 23 may have a simple shape. For this reason, even when the nozzle 23 is formed of a resin material, the shape of the mold may be simple, and the manufacturing cost can be reduced. As described above, the nozzle 23 has a configuration in which the flat portion 43 and the protruding portion 44 are provided, so that the nozzle 23 has a simple shape and can prevent dripping without increasing the manufacturing cost.

  As described above, according to the liquid dispenser 1 according to the first embodiment of the present invention, the front end of the nozzle 23 is formed with the flat surface portion 43 and a curved surface with a predetermined angle, and has a surface portion 45 formed of a groove 45a. By adopting a configuration in which the portion 44 is provided, dripping can be prevented with a simple configuration.

(Second Embodiment)
Next, the configuration of the nozzle 23A used in the liquid dispenser 1 according to the second embodiment of the present invention will be described with reference to FIG.

  FIG. 7 is a perspective view showing a configuration of a nozzle 23A used in the liquid dispenser 1 according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the structure similar to the nozzle 23 of the liquid dispenser 1 which concerns on 1st Embodiment mentioned above among the structures of the nozzle 23A of the liquid dispenser 1 which concerns on 2nd Embodiment, The detailed Description is omitted. Moreover, since the liquid dispenser 1 which concerns on 2nd Embodiment is the liquid dispenser 1 which concerns on 1st Embodiment mentioned above, and is the structure same except the structure of the nozzle 23A, the detailed description is abbreviate | omitted.

  As shown in FIG. 7, the nozzle 23 </ b> A is formed integrally with the movable body 32 by, for example, a resin material. The nozzle 23 </ b> A includes a body portion 41 having a communication hole 42 that is continuous with the pump chamber, a flat surface portion 43 formed at the tip of the body portion 41, and a protruding portion 44 formed with a surface portion 45 </ b> A. Yes.

  45 A of surface parts are the some groove | channels 45b formed in the protrusion part 44, for example. Specifically, the surface portion 45A is a plurality of grooves 45b provided in the present embodiment in a radial manner and at equal intervals from the axial center of the protruding portion 44.

  The groove 45 b is provided from the outer surface of the protruding portion 44 to the flat surface portion 43, and connects the outer surface of the protruding portion 44 and a part of the communication hole 42. Further, the groove 45 b is formed so that its width gradually decreases from the tip of the protruding portion 44 toward the flat surface portion 43.

  The width of the groove 45b is formed so that a foamy and liquid liquid can be contacted. The groove 45b preferably has such a width that the foamy and liquid liquid attached to the groove 45b is held by the surface tension. For example, the width of the groove 45 b is formed to be 0.5 mm on the protruding portion 44 side, and the width is formed to be 0 mm on the plane portion 43.

  The liquid dispenser 1 using the nozzle 23 </ b> A configured in this way can obtain the same effect as the nozzle 23 described above. Further, the nozzle 23A is formed so that the surface portion 45A gradually increases toward the tip thereof, so that the discharged foam-like liquid is larger than the flat portion 43 side of the groove 45b. The light is diffused from the front end side to the outer peripheral surface of the protruding portion 44 and the flat portion 43. For this reason, at the time of discharge, it is possible to improve the bubble breakage by reducing the area in contact with the flat portion 43.

(Third embodiment)
Next, the configuration of the nozzle 23B used in the liquid dispenser 1 according to the third embodiment of the present invention will be described with reference to FIG.

  FIG. 8 is a perspective view showing a configuration of a nozzle 23B used in the liquid dispenser 1 according to the third embodiment of the present invention. Of the configuration of the nozzle 23B of the liquid dispenser 1 according to the third embodiment, the same configuration as the nozzles 23 and 23A of the liquid dispenser 1 according to the first embodiment and the second embodiment described above is the same. Reference numerals are assigned and detailed description thereof is omitted. Further, the liquid dispenser 1 according to the third embodiment has the same configuration as the liquid dispenser 1 according to the first embodiment and the second embodiment described above except for the configuration of the nozzle 23B. Description is omitted.

  As shown in FIG. 8, the nozzle 23B is integrally formed with the movable body 32 by, for example, a resin material. The nozzle 23 </ b> B includes a body portion 41 having a communication hole 42 that is continuous with the pump chamber, a flat surface portion 43 formed at the tip of the body portion 41, and a protruding portion 44 formed with a surface portion 45 </ b> B. Yes.

  The surface portion 45B is, for example, a protruding portion formed in the protruding portion 44, and the protruding portion 44 has an outer surface formed in a curved surface, and irregularities are formed by the surface portion 45B. Specifically, the surface portion 45B includes a first protrusion 45c that protrudes in a cylindrical shape from the tip of the protrusion 44, and a plurality of second protrusions 45d that allow the first protrusion 45c and the flat portion 43 to continue. I have.

  In the surface portion 45 </ b> B, the first projecting portion 45 c and the second projecting portion 45 d are formed by a part of a sphere having a larger diameter than the projecting portion 44. For example, when the protrusion 44 has a radius of 4 mm, the surface 45B is formed by a part of a spherical surface having the same center as the protrusion 44 and a radius of 5 mm.

  The first projecting portion 45c is formed with a curved end surface, and the communication hole 42 is opened. The second protrusion 45 d is a rib that passes between the first protrusion 45 c and the flat portion 43.

  In other words, the surface portion 45B forms a protruding portion that protrudes from the flat surface portion 43, and the surface portion 45B includes the outer peripheral surface of the first protruding portion 45c, the side surface of the second protruding portion 45d, the outer surface of the protruding portion 44, and the flat surface portion 43. A recess is formed in which a part of is notched.

  The protruding portion 44 on which the surface portion 45B is formed increases the surface area by the outer surface and the outer surface of the surface portion 45B.

  According to the liquid dispenser 1 having the nozzle 23 </ b> B configured in this manner, the protrusion 44 has a surface area that increases the surface area and holds the liquid because the surface 45 </ b> B forms a recess whose outer surface forms a bottom surface. As a result, it is possible to prevent the liquid from dripping as much as possible.

  In addition, the nozzle 23B is formed in a cylindrical shape having a communication hole 42 therein, and the protruding portion 44 in which the surface portion 45B is formed is integrally molded on the flat surface portion 43 of the end surface thereof. A simple shape is sufficient. For this reason, even when the nozzle 23 is formed of a resin material, the shape of the mold may be simple, and the manufacturing cost can be reduced. As described above, like the nozzles 23 and 23A described above, the nozzle 23B has a simple shape and can prevent dripping without increasing the manufacturing cost.

  The present invention is not limited to the above embodiment. In the example described above, the liquid used in the liquid dispenser 1 has been described as being soap. However, the present invention is not limited to this, and other liquids may be used as long as the liquid is discharged in the form of bubbles. Moreover, the liquid dispenser 1 mentioned above is not limited to the above-mentioned structure. For example, the liquid dispenser 1 may have a configuration in which the supply device 11 itself does not have the outer member 10 and has the sensor 13 and the control unit 14, and is integrated into a device for supplying tap water. It may be a configuration. In other words, the liquid dispenser 1 may have any form as long as the nozzle 23, 23A, 23B or a nozzle having the same configuration as the nozzles 22, 23A, 23B is provided at the tip of the supply means 22 that discharges the foam-like liquid. It can be set as appropriate.

  Furthermore, in the above-described example, the configuration in which the communication hole 42 is opened at the tip of the protrusion 44 has been described. For example, the main surface parallel to the flat surface portion 43 is formed on the crest of the communication hole 42 and the protrusion 44. The structure which provides the chamfering part which comprises may be sufficient. By providing the chamfered portion, even if a liquid liquid accumulates at the tip of the projecting portion 44, the liquid liquid can be held in a wide area as much as possible, and liquid dripping can be prevented as much as possible. In addition, various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Liquid dispenser, 10 ... Outer member, 11 ... Supply apparatus, 12 ... Drive mechanism, 13 ... Sensor, 14 ... Control part, 15 ... Electric power supply part, 21 ... Tank, 22 ... Supply means, 23 ... Nozzle, 31 ... Fixed body, 32 ... movable body, 33 ... pump part, 34 ... mixing part, 41 ... trunk part, 42 ... communication hole, 43 ... flat part, 44 ... projecting part, 45 ... surface part, S ... signal line.

Claims (8)

Provided in a liquid dispenser that supplies liquid in the form of foam, in the nozzle for discharging the foam-like liquid,
A body portion formed with a communication hole through which the liquid passes;
A flat surface portion that is formed at an end portion of the body portion and in which the communication hole is opened,
The surface of the flat portion is provided around the communication hole, and the discharged foamy liquid is inclined at an inclination angle at which it can move to a portion of the flat portion, and a surface area is provided on a portion thereof. A protrusion formed with a surface portion to be increased; and
A nozzle comprising:   2. The nozzle according to claim 1, wherein the planar portion and the protruding portion have a surface area wider than an opening area of the communication hole.   The nozzle according to claim 2, wherein the protrusion is formed of a curved surface.   The nozzle according to claim 3, wherein the protrusion is configured by a part of a spherical surface having a predetermined radius.   The nozzle according to claim 4, wherein the protrusion has a height from the flat portion that is ½ or less of a radius thereof.   The nozzle according to claim 1, wherein the surface portion is a plurality of grooves that allow the curved surface of the protruding portion and the communication hole to be continuous.   The nozzle according to claim 1, wherein the surface portion is unevenness formed on a curved surface of the protruding portion.   The nozzle according to claim 1, wherein the inclination angle is an angle of not less than 0 degrees and not more than 60 degrees with respect to the planar portion.

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