JP2010269271A - Spray unit, and electrostatic sprayer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve both the enhancement of spraying properties and the enhancement of safety in a spray unit equipped with a needle-shaped nozzle and an electrostatic sprayer. <P>SOLUTION: The spray unit provided to the electrostatic sprayer (1) is equipped with a container (11) filled with a liquid and the needle-shaped nozzle (21) having a liquid passage, which allows the inside of the container (11) to communicate with the outside, formed therein and applies predetermined voltage to the liquid in the container (11) and internally pressurizes the container (11) to spray the liquid from the tip (21a) of the nozzle (21). A support part (22), which supports the nozzle (21) so as to freely move the same between a protrusion position where the nozzle (21) protrudes from the container (11) and a retraction position where the nozzle (21) is retracted toward the container (11) from the protrusion position, is provided to the spray unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a spray unit and an electrostatic spray apparatus for spraying a liquid, and particularly relates to a spray unit and an electrostatic spray apparatus provided with a needle-like nozzle.

  Conventionally, for example, in order to spray a liquid containing a substance useful for the human body into a room, a nozzle is provided at the tip of a container filled with the liquid, a voltage is applied to the liquid in the container, and the inside of the container is pressurized to apply the liquid. An electrostatic spraying device is known in which liquid is sprayed by an electric field formed at the tip of the nozzle and supplied to the tip of the nozzle (see, for example, Patent Document 1 below).

  By the way, when spraying a liquid using the above-mentioned electrostatic spraying apparatus using a fine needle-like nozzle, the particle diameter of the liquid is stabilized and the spraying property is improved. Therefore, an electrostatic spraying device using a thin needle-like nozzle has been used.

Japanese Patent Laid-Open No. 5-13881

  However, if the thin needle-like nozzle as described above is used, there is a risk that the user may accidentally touch the tip of the nozzle and be injured.

  This invention is made | formed in view of this point, and the objective is to aim at coexistence of the improvement of a spraying property and the improvement of safety | security in the spraying unit and electrostatic spraying apparatus provided with the needle-shaped nozzle. is there.

  The first invention includes a container (11) filled with a liquid, and a needle-like nozzle (21) having a liquid passage communicating with the inside and outside of the container (11). A spray unit provided in the electrostatic spraying device (1) for applying a predetermined voltage to the liquid in the container and pressurizing the container (11) to spray the liquid from the tip (21a) of the nozzle (21). The nozzle (21) is supported so that the nozzle (21) is movable between a protruding position protruding from the container (11) and a retracted position retracted from the protruding position toward the container (11). Supporting parts (22, 29) are provided.

  In the first invention, since the needle-like nozzle (21) is used, the particle size of the liquid ejected from the nozzle (21) is stabilized, and the spray properties are improved. The spray unit (10) also supports the nozzle (21) so that the needle-like nozzle (21) can move between a protruding position and a retracted position retracted from the protruding position toward the container (11). Part (22, 29). Therefore, even if the user accidentally touches the tip of the needle-shaped nozzle (21), the needle-shaped nozzle (21) is moved by the nozzle (21) retreating from the protruding position toward the container (11). Do not stab them.

  In a second aspect based on the first aspect, the support portion (22) includes an elastic member (13, 26) to which the nozzle (21) is fixed and elastically deformable in the axial direction of the nozzle (21). I have.

  In the second invention, the nozzle (21) is fixed to an elastic member (13, 26) that is elastically deformable in the axial direction of the nozzle (21). Thus, for example, when an external force is applied to the nozzle (21) in the axial direction of the container (11), the container in the axial direction of the nozzle (21) is applied to the elastic member (13, 26) via the nozzle (21). (11) A lateral force is applied, and the elastic members (13, 26) are deformed. Thereby, the nozzle (21) moves backward from the protruding position toward the container (11) in the axial direction to reach the retracted position. On the other hand, when the external force applied to the nozzle (21) is removed, the elastic members (13, 26) are restored and the nozzle (21) returns to the original protruding position.

  In a third aspect based on the second aspect, the support portion (22) is formed with an insertion hole (14d, 27d) through which the nozzle (21) is inserted to cover the elastic member (13, 26). A cover (14, 27) is provided, and the tip (21a) of the nozzle (21) in the retracted position is located inside the outer surface of the cover (14, 27).

  In the third invention, the nozzle (21) is inserted into the insertion hole (14d, 27d) formed in the cover (14, 27) covering the elastic member (13, 26), and the tip (21a) is in the retracted position. It is supported by the support part (22) so that it may be located inside the outer surface of the said cover (14,27). In other words, even if the user accidentally touches the tip (21a) of the nozzle (21), when the nozzle (21) is retracted to the retracted position, the user's finger is placed on the cover (14, 27). While contacting the outer surface, the tip (21a) of the nozzle (21) is accommodated in the cover (14, 27) of the support portion (22).

  In a fourth aspect based on the first aspect, the support portion (29) includes a bellows portion (11c) formed in the container (11) and capable of expanding and contracting in the axial direction of the nozzle (21). .

  In 4th invention, the support part (29) is provided with the bellows part (11c) which can be expanded-contracted to the axial direction of a nozzle (21). Therefore, the nozzle (21) is supported so as to be movable in the axial direction as the bellows part (11c) expands and contracts in the axial direction. As a result, if the user accidentally touches the tip (21a) of the nozzle (21), the bellows part (11c) contracts to cause the nozzle (21) to move from the protruding position to the container (11 ) Move backward. On the other hand, when the user's hand leaves the nozzle (21), the bellows part (11c) is restored to the original shape, and the nozzle (21) automatically returns to the original protruding position.

  The fifth invention includes any one of the first to fourth spray units (10), applies a predetermined voltage to the liquid in the container (11), and pressurizes the container (11). It is an electrostatic spraying device that sprays liquid from the tip of the nozzle (21).

  In the fifth invention, the liquid in the container (11) to which a voltage is applied is supplied to the tip (21a) of the nozzle (21) by pressurizing the inside of the container (11), and the nozzle (21) An electric field is formed at the tip (21a). Thereby, the liquid at the tip (21a) of the nozzle (21) is continuously sprayed in the form of a mist. Further, since the needle-like nozzle (21) is used, the particle size of the liquid ejected from the nozzle (21) is stabilized, and the spray properties are improved. Furthermore, since the needle-shaped nozzle (21) is configured to be movable between a predetermined protruding position and a retracted position, the user accidentally touches the tip (21a) of the needle-shaped nozzle (21). Even if it is, the nozzle (21) retracts in the axial direction from the protruding position and retracts toward the container (11).

  According to a sixth aspect of the present invention, there is provided a housing (41), a container (11) accommodated in the housing (41) and filled with a liquid, and attached to the container (11). A needle-like nozzle (21) formed in the inside of the liquid passage for communicating the liquid, and applying a predetermined voltage to the liquid in the container (11) and pressurizing the inside of the container (11) An electrostatic spraying device that sprays from the tip (21a) of the nozzle (21), wherein the nozzle (21) is movable between a predetermined reference position and a retracted position that is retracted in the axial direction from the reference position. Thus, a support member (60) for supporting the container (11) so as to be movable in the axial direction of the nozzle (21) is provided.

  In the sixth invention, since the needle-shaped nozzle (21) is used, the particle size of the liquid ejected from the nozzle (21) is stabilized, and the spray properties are improved. Further, the container (11) is supported by the support member (60) so as to be movable between a reference position and a retracted position in the axial direction of the nozzle (21). Therefore, even if the user accidentally touches the tip (21a) of the nozzle (21), the container (11) moves back in the axial direction of the nozzle (21), so that the nozzle (21) also moves back in the axial direction. Therefore, the needle-shaped nozzle (21) does not pierce the finger or the like.

  In a seventh aspect based on the sixth aspect, the support member (60) includes a slide mechanism (61) for slidably supporting the container (11) in the axial direction of the nozzle (21), and the slide mechanism. A spring member (62) interposed between the housing (41) and biasing the slide mechanism (61) so that the nozzle (21) is positioned at the reference position. Yes.

  In the seventh invention, the support member (60) includes a slide mechanism (61) and a spring member (62), and the container (11) is slidable in the axial direction of the nozzle (21) by the slide mechanism (61). The slide mechanism (61) is biased by the spring member (62) so that the nozzle (21) is positioned at the reference position. As a result, if the user accidentally touches the tip (21a) of the nozzle (21), the force applied to the nozzle (21) is transmitted to the slide mechanism (61), and the container (11) Retreat in the axial direction of the nozzle (21). As a result, the nozzle (21) also moves backward. On the other hand, when the user's hand moves away from the nozzle (21), the container (11) returns to the original position together with the slide mechanism (61) by the restoring force of the spring member (62), and the nozzle (21) also returns to the reference position. To do.

  In an eighth aspect based on the first aspect, the inner wall of the container (11) is constituted by a member having affinity for the liquid filled in the container (11), while the container (11 ), One end (21b) of the nozzle (21) is disposed, and an air reservoir (66) in which bubbles in the container (11) accumulate above the one end (21b) of the nozzle. Is formed.

  By the way, when the container (11) is filled with the liquid, a little air is mixed. Therefore, when the liquid is supplied to the extremely small diameter liquid passage of the nozzle (21), there is a possibility that bubbles are also mixed. In such a case, even if the inside of the container (11) is pressurized to push out the liquid, the bubbles in the liquid passage are compressed, so that the liquid is not transported and is not discharged (so-called air lock state). There is a fear.

  However, in the eighth invention, due to the above configuration, even if bubbles are mixed in the container (11), the bubbles do not adsorb on the inner wall of the container (11) and rise upward due to buoyancy, The air is collected in the air reservoir (66) above the one end (21b) of the nozzle (21). Since the air bubbles collected in the air reservoir (66) are above the one end (21b) of the nozzle (21), it is difficult to flow into the liquid passage in the nozzle (21).

  According to the present invention, by configuring the needle-like nozzle (21) to be movable between the protruding position and the retracted position retracted toward the container (11) from the protruding position, the user mistakenly operates. Even if the tip (21a) of the nozzle (21) is touched, the nozzle (21) can be retracted from the protruding position toward the container (11). Therefore, the spray properties can be improved by using the needle-shaped nozzle (21), and the nozzle (21) is supported by the support portions (22, 29) so as to be movable between the protruding position and the retracted position. Therefore, safety can be improved.

  Further, according to the second invention, the nozzle (21) is fixed to the elastic member (13, 26) that is elastically deformable in the axial direction of the nozzle (21), so that the user mistakenly sets the nozzle (21). If the tip of the nozzle is touched, the nozzle (21) can be retracted to the retracted position to avoid injury to the user. On the other hand, when the user's hand leaves the nozzle (21), the nozzle (21) Can be easily returned to the original protruding position. Further, such a spray unit (10) can be easily configured.

  According to the third invention, even if the user accidentally touches the tip (21a) of the nozzle (21), the nozzle (21) moves backward in the axial direction to reach the retracted position. The user's finger contacts the outer surface of the cover (14, 27), while the tip (21a) of the nozzle (21) is accommodated in the cover (14, 27) of the support portion (22). Therefore, it can prevent more reliably that the front-end | tip (21a) of a nozzle (21) is stuck in a user's finger | toe etc. Therefore, the safety of the spray unit (10) can be further improved.

  Further, according to the fourth invention, the nozzle (21) is supported in the axial direction by supporting the nozzle (21) by the support portion (29) having the bellows portion (11c) formed in the container (11). It can be configured to be movable. Therefore, if the user accidentally touches the tip (21a) of the nozzle (21), the nozzle (21) is retracted in the axial direction to avoid injury while the user's hand moves away from the nozzle (21). The spray unit (10) can be easily configured to return to the protruding position.

  Moreover, according to 5th and 6th invention, the electrostatic spraying apparatus (1) excellent in spraying property and safety | security can be provided.

  In addition, according to the seventh invention, with a simple configuration, it is possible to realize a structure that prevents the user from being injured even if the user accidentally touches the tip (21a) of the nozzle (21). Can do.

  According to the eighth aspect of the invention, the inner wall of the container (11) is constituted by a member having affinity for the liquid to be filled, and is in the container (11) and at one end of the nozzle (21) ( An air pocket (66) was formed above 21b). Therefore, even when bubbles are mixed in the container (11), the liquid filled in the container (11) is adsorbed on the inner wall of the container (11), so that the bubbles are adsorbed on the inner wall. Instead, it rises upward due to buoyancy. Therefore, bubbles can be collected in the air reservoir (11) above the one end (21b) of the nozzle (21). Therefore, it is possible to prevent bubbles in the container (11) from flowing into the liquid passage of the nozzle (21) with a simple configuration.

FIG. 1 is a perspective view showing the configuration of the electrostatic spraying apparatus according to Embodiment 1 as viewed from the first cover side. FIG. 2 is a perspective view showing the configuration of the electrostatic spraying apparatus according to the first embodiment when viewed from the second cover side. FIG. 3 is a front view illustrating the configuration of the electrostatic spraying apparatus according to the first embodiment. FIG. 4 is a longitudinal sectional view showing the configuration of the electrostatic spraying apparatus according to the first embodiment. FIG. 5 is a perspective view showing the configuration of the pressurizing means. FIG. 6 is a cross-sectional view showing the configuration of the spray cartridge. 7A and 7B are diagrams illustrating the operation of the nozzle portion, where FIG. 7A shows a state where the nozzle body is located at the protruding position, and FIG. 7B shows a state where the nozzle body is located at the retracted position. 8A and 8B are diagrams illustrating the operation of the nozzle unit of the electrostatic spraying device according to the second embodiment. FIG. 8A illustrates a state in which the nozzle body is located at the protruding position, and FIG. 8B illustrates the nozzle body at the retracted position. Indicates the position. 9A and 9B are diagrams illustrating the operation of the nozzle portion of the electrostatic spraying device according to the third embodiment, in which FIG. 9A illustrates a state in which the nozzle body is located at the protruding position, and FIG. 9B illustrates the nozzle body at the retracted position. Indicates the position. 10A and 10B are diagrams illustrating the operation of the nozzle unit of the electrostatic spraying apparatus according to the fourth embodiment, in which FIG. 10A illustrates a state in which the nozzle body is located at the reference position, and FIG. 10B illustrates the nozzle body in the retracted position. Indicates the position. FIG. 11 is a cross-sectional view illustrating a configuration of a spray cartridge according to Modification 1 of Embodiments 1 to 4. FIGS. 12A, 12 </ b> B, and 12 </ b> C are diagrams illustrating the attachment operation of the spray cartridge according to the second modification of the first to fourth embodiments.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
As shown in FIGS. 1-6, the electrostatic spraying apparatus (1) of this embodiment is installed and used on a desktop etc. As shown in FIG. The electrostatic spraying device (1) includes a main body (40), a base cover (42), and a support (43).

  The main body (40) includes a housing (41), a spray cartridge (10) detachably attached to the housing (41), and a pressurizing means (8).

  The housing (41) includes a housing body (41a) and a pair of cover members (41b, 41c) that respectively cover both ends of the housing body (41a).

  The housing body (41a) is formed in a cylindrical shape. A support portion (43) for supporting the housing body (41a) is provided at a lower portion of the housing body (41a). On the other hand, a shroud portion (31) for protecting a nozzle body (21) of a spray cartridge (10) to be described later is formed on the upper portion of the housing body (41a). As for this shroud part (31), a part of circumferential direction of the housing main body (41a) bulges outside. A recess (32) is formed at the center of the shroud portion (31) so as to cover the periphery of the nozzle body (21).

  Further, LED lights (46) are attached to the outer peripheral surface of the housing body (41a) below the shroud portion (31) (two in FIG. 1). This LED light (46) is irradiated toward the liquid to be sprayed from the tip (21a) of the nozzle body (21) of the spray cartridge (10), and is for the user to confirm the spray state.

  The cover member (41b, 41c) includes a first cover (41b) and a second cover (41c) that form a pair.

  As shown in FIG. 1, the first cover (41b) is formed in a circular shape having substantially the same outer shape as one end face of the housing body (41a), and is attached so as to cover one end face of the housing body (41a). . The first cover (41b) is attached so that the user can turn it in the circumferential direction of the housing body (41a). The surface of the first cover (41b) is provided with a strip-like counter electrode (44) for the charged liquid, while the back surface of the first cover (41b) is not shown, but the first cover (41b) A cylindrical winding upper portion having a smaller diameter is formed. A cutout spirally cut along the circumferential direction of the upper part is formed in the upper part of the winding, and the movement of the pressure stage (52) described later is restricted.

  On the other hand, as shown in FIG. 2, the second cover (41c) is formed in a circular shape having substantially the same outer shape as the other end surface of the housing body (41a), and is attached so as to cover the other end surface of the housing body (41a). ing. On the surface of the second cover (41c), a strip-shaped counter electrode (44) for the charged liquid is provided, while a volume knob (45) interlocking with the output adjustment volume (not shown) of the power supply unit is provided. It has been. By rotating the volume knob (45), the output voltage from the power supply unit is appropriately adjusted. In addition, the power supply part should just be comprised so that a voltage may be converted into the value of 0 kV or more and 12 kV or less.

  The pedestal cover (42) is formed in a bowl shape along the cylindrical side surface of the housing body (41a). The pedestal cover (42) is attached to the support portion (43) and used as a pedestal during use (see FIG. 1 and FIG. 2). The pedestal cover (42) is attached so as to cover the shroud portion (31) of the main body (40) when not in use (during storage) to protect the nozzle main body (21). In addition, this electrostatic spraying device (1) can adjust the height of the electrostatic spraying device (1) in two steps by using the base cover (42) after removing it from the support part (43). it can.

  The pressurizing means (8) is for compressing the container (11) of the spray cartridge (10) and transporting the liquid in the container (11) to the tip (21a) of the nozzle body (21). . As shown in FIG. 5, the pressurizing means (8) includes the first cover (41b), two constant load springs (51), a pressurizing stage (52), and a partition plate (53). ing.

  The pressurizing stage (52) has a bottomed cylindrical main body (52a) and two mainspring support portions (52b). The bottomed cylindrical main body (52a) is disposed such that the bottom faces the second cover (41c). On the other hand, the two mainspring support portions (52b) are formed at positions that are inverted by 180 ° about the axis of the main body portion (52a), and are parallel to each other from the outer peripheral surface of the main body portion (52a) toward the radially outer side. It has a pair of plate-shaped members which protrude in the direction. The pair of plate-like members are formed with notches that are rotatably engaged with both end portions of the shaft (51a) of the two constant load springs (51).

  A convex portion (52c) that protrudes in the axial direction is formed on the inner surface of the end portion on the first cover (41b) side of the main body portion (52a) of the pressure stage (52). When the protrusion (52c) is engaged with a notch formed in the upper part of the first cover (41b) and the first cover (41b) is rotated in the circumferential direction of the housing body (41a), the protrusion The part (52c) is guided to the first cover (41b) side along the spiral cutout. Accordingly, the pressure stage (52) moves to the first cover (41b) side and is held by the first cover (41b). In this state, the container (11) of the spray cartridge (10) is separated from the pressure stage (52). On the other hand, when the first cover (41b) is rotated in the reverse direction, the convex portion (52c) is guided to the second cover (41c) side along the spiral notch at the upper part of the winding, and the convex portion (52c) is eventually wound. Detach from the top. At this time, the pressure stage (52) is movable with respect to the first cover (41b). That is, the first cover (41b) is rotated to switch between holding and releasing the pressure stage (52).

  The constant load spring (51) includes a shaft (51a) and a belt-shaped metal plate (51b) wound around the shaft (51a) with a constant curvature. The constant load spring (51) generates a restoring force (load) when pulling out the metal plate (51b), and if the pulling amount (stroke) of the metal plate (51b) exceeds a predetermined length, the restoring force (Load) is configured to be constant regardless of the stroke. The shaft (51a) is rotatably engaged with the notch of the mainspring support portion (52b) of the pressure stage (52). On the other hand, the metal plate (51b) is partially pulled out to the second cover (41c) side, and its end (51c) is fixed to the housing body (41a).

  The partition plate (53) is formed of a flat plate member, and faces the pressure stage (52) with the container (11) of the spray cartridge (10) interposed therebetween in the housing (41). is set up. The partition plate (53) is attached to the housing body (41a).

  The elements other than the first cover (41b) of the pressurizing means (8) are arranged in order from the first cover (41b) to the second cover (41c) in the housing body (41a). 52) (the constant load spring (51) is engaged), the container (11) of the spray cartridge (10), and the partition plate (53) are arranged in this order.

  With the above configuration, in the pressurizing unit (8), the first cover (41b) is rotated in a predetermined direction to release the pressurization stage (52) held on the first cover (41b). Then, the pressure stage (52) moves while being pressed toward the second cover (41c) by the restoring force of the constant load spring (51). As a result, the container (11) of the spray cartridge (10) is pressed toward the second cover (41c) by the main body (52a) of the pressure stage (52), and is compressed between the partition plate (53). Pressure. On the other hand, when the first cover (41b) is rotated in the direction opposite to the predetermined direction, the pressure stage (52) is re-engaged with the first cover (41b) and moved to the first cover (41b) side. And held by the first cover (41b). Thereby, a pressurization stage (52) separates from a container (11), and pressurization is cancelled | released.

  The housing (41) is provided with a voltage switch (47), and the pressure stage (52) is provided with a pusher (49) for turning on and off the voltage switch (47). The pusher (49) contacts the voltage switch (47) when the first cover (41b) rotates relative to the housing body (41a) and the pressure stage (52) moves. It is like that. When the pressurizing means (8) is in the pressurizing operation, the pusher (49) continues to contact the voltage switch (47), and the voltage switch (47) is maintained in the ON state. Thereby, a high voltage is applied to the liquid in the container (11). When the pressurizing operation of the pressurizing means (8) is released, the pusher (49) is separated from the voltage switch (47) and the voltage switch (47) is turned off. Thereby, the voltage application to the liquid in the container (11) is released.

  Thus, in this embodiment, the pressurization operation to the container (11) and the on / off of the voltage switch (47) are performed simultaneously by rotating the first cover (41b).

  As shown in FIGS. 4 and 6, the spray cartridge (10) includes a container (11), a nozzle portion (20), and a nozzle base (33). And these containers (11), the nozzle part (20), and the nozzle base (33) are assembled | attached integrally.

The container (11) is formed in a flat bag shape. Specifically, the container (11) is formed by overlapping two rectangular sheets made of a relatively flexible material that does not allow liquid to permeate. These two sheets are bonded to each other on the four sides, and an opening (11a) is formed on one side on the short side so as to project outward. The container (11) is filled with a cosmetic liquid (for example, a liquid containing hyaluronic acid) containing a moisturizing component and an antioxidant component. The concentration of this liquid is adjusted so that the electric resistivity is 1.0 × 10 ⁴ Ωcm or more and 1.0 × 10 ⁷ Ωcm or less.

  The nozzle part (20) includes a nozzle body (21) formed in a needle shape, and a nozzle support part (22) that supports the nozzle body (21).

  The nozzle body (21) has a liquid passage formed therein, and has an outer diameter of about 0.50 mm, for example. The nozzle body (21) is made of a metal material. The nozzle body (21) is provided so as to penetrate the nozzle support portion (22) and communicates with the inside and outside of the container (11).

  On the other hand, the nozzle support portion (22) includes a conductive member (12), an elastic member (13), and a pressing member (14), and is fixed to the mouth (11a) of the container (11).

  The conductive member (12) is made of a conductive material such as metal, and constitutes a voltage applying means for applying a charge (applying a high voltage) to the liquid in the container (11). The conductive member (12) is inserted into the opening (11a) of the container (11), and is integrally formed with the insertion part (12a) that contacts the liquid in the container (11) and the outer end of the insertion part (12a). The flange (12b) is formed with a larger diameter than the mouth (11a) of the container (11). The conductive member (12) has a flange (12b) electrically connected to a power supply unit (not shown), and applies a high voltage to the liquid in the container (11) via the insertion unit (12a). It is configured. A seat surface (12c) for installing the elastic member (13) is formed at the end of the flange (12b) opposite to the insertion portion (12a). The conductive member (12) has a through hole (12d) extending from the end surface on the insertion portion (12a) side to the end surface (seat surface (12c)) on the flange (12b) side. The through hole (12d) has a small diameter portion (12e) on the insertion portion (12a) side and a large diameter portion (12f) on the flange (12b) side.

  In the present embodiment, the elastic member (13) is made of a plate-like rubber that is elastically deformed. The nozzle body (21) passes through the central portion of the elastic member (13) and is fixed to the elastic member (13). The elastic member (13) is in contact with the seating surface (12c) of the conductive member (12), and the nozzle body (21) fixed to the elastic member (13) is a through hole of the conductive member (12). (12d) is provided to be inserted.

  The pressing member (14) protrudes radially inward from the cylindrical portion (14a), a closing portion (14b) that closes one end of the cylindrical portion (14a), and the other end of the cylindrical portion (14a). And an annular claw portion (14c). An insertion hole (14d) is formed at the center of the disk-shaped blocking portion (14b). The pressing member (14) covers the flange (12b) and the elastic member (13) of the conductive member (12), and the claw portion (14c) is provided so as to be caught by the end surface of the flange (12b). Further, the nozzle body (21) fixed to the elastic member (13) is inserted through the insertion hole (14d) of the blocking portion (14b). The insertion hole (14d) is formed in such a size that the nozzle body (21) can be inserted, but a user's finger or the like cannot be inserted.

  As described above, the nozzle body (21) is fixed to the elastic member (13) made of a plate-like rubber, and the nozzle body (21) is connected to each of the through-holes of the conductive member (12) and the pressing member (14) ( The elastic member (13) is sandwiched between the conductive member (12) and the pressing member (14) while being inserted through 12d, 14d). At this time, the outer peripheral portion of the elastic member (13) contacts the seating surface (12c) of the flange (12b) of the conductive member (12), but the inner peripheral portion including the periphery of the nozzle body (21) It faces the large diameter part (12f) of the through hole (12d) formed in 12). That is, the elastic member (13) is sandwiched between the conductive member (12) and the pressing member (14) so that the inner peripheral portion thereof can bulge toward the large diameter portion (12f) of the through hole (12d). ing.

  With this configuration, when an axial force (toward the container (11)) is applied to the nozzle body (21), the inner peripheral portion of the elastic member (13) to which the nozzle body (21) is fixed becomes the container ( 11) It bends so as to bulge to the side, and along with this, the nozzle body (21) retreats toward the container (11) with respect to the axial direction from the protruding position (see FIG. 7 (A)). (See FIG. 7B). On the other hand, when the force applied to the nozzle body (21) is removed, the elastic member (13) is restored, and the nozzle body (21) moves forward from the retracted position in the axial direction to the protruding position. Return (see FIG. 7A).

  Thus, the nozzle body (21) is attached to the container (11) via the nozzle support part (22) having the elastic member (13) configured to be elastically deformable in the axial direction. Therefore, the nozzle body (21) is movably supported by the nozzle support portion (22) to a predetermined protruding position and a retracted position that is retracted from the protruding position toward the container (11) with respect to the axial direction. .

  The nozzle support part (22) has the tip (21a) of the nozzle body (21) at the protruding position located outside the outer surface, while the tip (21a) of the nozzle body (21) at the retracted position is located more than the outer surface. It is comprised so that it may be located inside. That is, the tip (21a) of the nozzle body (21) protrudes from the outer surface of the pressing member (14) of the nozzle support portion (22) at the protruding position, while from the outer surface of the pressing member (14) at the retracted position. Is also fixed to the elastic member (13) of the nozzle support (22) so as to be retractable to the inside. In this way, the state of the electric field formed at the tip (21a) of the nozzle body (21) during use can be stabilized by protruding the nozzle body (21) outward from the outer surface of the nozzle support (22). it can. On the other hand, if the user accidentally touches the tip (21a) of the nozzle body (21), the nozzle body (21) is located at the same position as the outer surface of the nozzle support section (22) or inside the outer surface. On the other hand, the user's finger abuts against the outer surface of the nozzle support portion (22), thereby preventing the nozzle body (21) from being stuck in the finger.

  In addition, a nozzle cap (23) (see FIG. 1) is detachably attached to the nozzle portion (20) in order to prevent the liquid in the nozzle body (21) from drying when not in use. . As shown in FIG. 4, the spray cartridge (10) has a housing (so that the tip (21a) of the nozzle body (21) faces obliquely upward and is exposed in the recess (32) of the shroud portion (31). 41) It is detachably arranged inside.

  The said nozzle base (33) is being fixed to the container (11) and the nozzle part (20), as shown in FIG. A mounting recess (36) in which the nozzle portion (20) is accommodated is formed on the inner side (container (11) side) of the nozzle base (33). On the outside of the nozzle base (33), there is provided a nozzle recess (34) in which the tip (21a) of the nozzle body (21) is accommodated. The tip (21a) of the nozzle body (21) is provided so as not to protrude from the nozzle recess (34). The nozzle recess (34) communicates with the mounting recess (36).

  Moreover, the said nozzle base (33) comprises a part of shroud part (31) of a housing main body (41a), as shown in FIG.1 and FIG.2. That is, the nozzle recess (34) of the nozzle base (33) becomes a part of the recess (32) of the shroud portion (31). The nozzle base (33) has a shape extending in the circumferential direction of the shroud portion (31), and is fitted into the shroud portion (31). Extraction knobs (3a) are formed at both ends of the nozzle base (33).

  Further, a lock member (not shown) that holds the spray cartridge (10) in use is provided in the housing (41).

  In the spray cartridge (10), when the container (11) is compressed by the pressurizing means (8), the liquid in the container (11) is supplied to the nozzle body (21). On the other hand, when a high voltage is applied to the liquid in the container (11) via the conductive member (12), an electric field is formed at the tip (21a) of the nozzle body (21). Thereby, a liquid is continuously sprayed from the front-end | tip (21a) of a nozzle main body (21) in the shape of a mist. The spray cartridge (10) is replaced when there is no more or less liquid in the container (11). When replacing the spray cartridge (10), the spray cartridge (10) including the nozzle base (33) is removed from the housing (41) by pulling the knob (3a) for removing the nozzle base (33). It is. Then, a new spray cartridge (10) including the nozzle base (33) is mounted. That is, in this embodiment, the nozzle base (33) is replaced integrally with the nozzle portion (20) and the like. Therefore, when the spray cartridge (10) is replaced, the positional relationship between the nozzle base (33), which is at least a part of the shroud portion (31), and the tip (21a) of the nozzle body (21) does not change, so the spray environment Can be kept constant.

-Driving action-
Next, operation | movement of the electrostatic spraying apparatus (1) of this embodiment is demonstrated. In this electrostatic spraying device (1), so-called cone jet mode EHD spraying is performed.

  First, when the user manually turns the first cover (41b) in the circumferential direction of the housing body (41a), the restriction of the first cover (41b) on the pressure stage (52) is released. When the restriction is released, a force directed toward the second cover (41c) by the restoring force of the constant load spring (51) acts on the pressure stage (52), and the pressure stage (52) is moved to the partition plate (53). ) The container (11) is pressed by the moved pressure stage (52) and partition plate (53). The liquid in the compressed container (11) flows into the nozzle body (21). The liquid that has flowed into the nozzle body (21) moves to the tip (21a) of the nozzle body (21).

  On the other hand, when the first cover (41b) is turned in the circumferential direction, the voltage switch (47) is turned on, and a high voltage is applied to the liquid in the container (11) from the power source via the conductive member (12). . The liquid charged with high voltage is polarized, and the liquid charged with + (plus) is collected near the gas-liquid interface at the tip (21a) of the nozzle body (21). Then, at the tip (21a) of the nozzle body (21), the gas-liquid interface is elongated due to the potential difference with the counter electrode (44) and becomes conical (conical). A part of the water liquid is torn off from the top to form droplets. Note that, in the case of the magnitude of the applied voltage and the electrical resistivity of the liquid according to the present embodiment, the size of the liquid droplets scattered from the tip (21a) of the nozzle body (21) is generally in the range of 50 μm to 200 μm. become. The liquid scattered from the nozzle body (21) reaches a distance of about 40 to 50 cm from the tip (21a) of the nozzle body (21). When the user installs the electrostatic spray device (1) with the tip (21a) of the nozzle body (21) facing the face approximately 50 cm forward, the scattered droplets adhere to the user's face.

-Operation of the nozzle body-
In the electrostatic spray device (1) of the present embodiment, the nozzle body (21) is provided with a nozzle support (22) so that a finger is not injured if the user accidentally touches the nozzle body (21). Thus, it is supported movably between a predetermined projecting position (see FIG. 7A) and a retracted position (see FIG. 7B) retracted from the projecting position toward the container (11) with respect to the axial direction.

  Specifically, when the user's finger touches the nozzle body (21) and axial force (toward the container (11)) is applied to the nozzle body (21), the nozzle body (21) Is bent so that the inner periphery of the elastic member (13) to which the is fixed bulges toward the container (11). Along with this, the nozzle body (21) fixed to the inner peripheral portion of the elastic member (13) moves backward toward the container (11) in the axial direction to reach the retracted position (see FIG. 7B). On the other hand, when the force applied to the nozzle body (21) is removed, for example, when the user's finger is separated from the nozzle body (21), the elastic member (13) is restored. Accordingly, the nozzle body (21) advances from the retracted position in the axial direction and returns to the protruding position (see FIG. 7A).

-Effect of the embodiment-
As described above, according to the spray cartridge (10) of the electrostatic spray device (1), since the needle-like nozzle body (21) is used, the particle size of the liquid ejected from the nozzle body (21) Can be stabilized and the spray properties can be improved. Further, the needle-shaped nozzle body (21) communicates with the inside and outside of the container (11), and is freely movable to a predetermined protruding position and a retracted position retracted from the protruding position toward the container (11) with respect to the axial direction. It is comprised so that. Therefore, even if the user accidentally touches the tip (21a) of the needle-shaped nozzle body (21), the nozzle body (21) is retracted in the axial direction from the protruding position and retracted to the container (11) side. be able to. Therefore, by using the needle-shaped nozzle body (21), the spray properties can be improved, and the nozzle body (21) can be moved between the protruding position and the retracted position to ensure safety. Can be improved.

  Further, according to the spray cartridge (10) of the electrostatic spray device (1), the nozzle body (21) is fixed to the elastic member (13) that is elastically deformable in the axial direction of the nozzle body (21). For example, if the user accidentally touches the tip (21a) of the nozzle body (21), the nozzle body (21) can be retracted to avoid injury to the user. The spray cartridge (10) that can easily return the nozzle body (21) to the protruding position when the hand is separated from the nozzle body (21) can be easily configured. Therefore, the spray cartridge (10) excellent in spray properties and safety can be easily configured.

  Further, according to the spray cartridge (10) of the electrostatic spraying device (1), the nozzle support (22) is supported at the position where the tip (21a) of the nozzle body (21) protrudes from the nozzle body (21). The outer surface of the nozzle support portion (22) is positioned outside the outer surface of the portion (22) (in this embodiment, the outer surface of the closing portion (14b) of the pressing member (14)) and the nozzle body (21) is in the retracted position. It is comprised so that it may be located inside. Therefore, even if the user accidentally touches the tip (21a) of the nozzle body (21), when the nozzle body (21) is retracted to the retracted position, the tip (21a) is inside the nozzle support (22). Therefore, the tip (21a) of the nozzle body (21) can be reliably prevented from being stuck in the user's finger or the like.

<< Embodiment 2 of the Invention >>
The electrostatic spraying device (1) according to Embodiment 2 is obtained by changing the configuration of the nozzle support portion (22) of Embodiment 1. Other configurations are the same as those in the first embodiment, and thus description thereof is omitted. Hereinafter, only the configuration and operation of the nozzle support portion (22) will be described.

  As shown in FIG. 8A, the nozzle support portion (22) according to the second embodiment includes a conductive member (25), an elastic member (26), and a pressing member (27).

  The conductive member (25) is formed of a conductive material such as a metal, like the conductive member (12) of the first embodiment, and applies a charge to the liquid in the container (11) (applying a high voltage). Voltage applying means is configured. The conductive member (25) is inserted into the opening (11a) of the container (11), and is integrally formed with the insertion portion (25a) that comes into contact with the liquid in the container (11) and the outer end of the insertion portion (25a). And a flange (25b) formed larger in diameter than the mouth (11a) of the container (11). The conductive member (25) is configured such that the flange (25b) is electrically connected to a power supply unit (not shown) and applies a high voltage to the liquid in the container (11) via the insertion unit (25a). It is configured. The conductive member (25) has a through hole (25d) extending from the end surface on the insertion portion (25a) side to the end surface on the flange (25b) side. The through hole (25d) has a small diameter portion (25e) on the insertion portion (25a) side and a large diameter portion (25f) on the flange (25b) side.

  In the second embodiment, the elastic member (26) includes a fixing member (26a) and a coil spring (26b) having one end connected to the fixing member (26a).

  The fixing member (26a) is formed in a cylindrical shape having an outer shape slightly smaller than the inner diameter of the large diameter portion (25f) of the through hole (25d) of the conductive member (25), and the large diameter portion (25f) Is provided inside. The nozzle body (21) is fixed to the fixing member (26a) so as to penetrate through the through hole (25d). The fixing member (26a) is provided in the large diameter portion (25f) of the through hole (25d) so as to be movable in the axial direction of the nozzle body (21). In addition, an O-ring (not shown) is fitted on the outer peripheral surface of the fixing member (26a), and between the outer peripheral surface of the fixing member (26a) and the inner wall surface of the conductive member (25) forming the through hole (25d). It is sealed.

  The coil spring (26b) is connected to the end surface of the fixing member (26a) on the container (11) side, and is provided so as to surround the nozzle body (21). The coil spring (26b) is provided in the large diameter portion (25f) of the through hole (25d) of the conductive member (25) together with the fixing member (26a), and extends in the axial direction of the nozzle body (21). It is configured to be elastically deformed. The coil spring (26b) urges the fixing member (26a) in the direction opposite to the container (11).

  By such a fixing member (26a) and a coil spring (26b), the elastic member (26) as a whole is configured to be elastically deformable in the axial direction of the nozzle body (21). The elastic member (26) has a large diameter portion so that the end of the nozzle body (21) on the container (11) side is inserted into the small diameter portion (25e) of the through hole (25d) of the conductive member (25). (25f).

  As with the pressing member (14) of the first embodiment, the pressing member (27) includes a cylindrical portion (27a), a closed portion (27b) that closes one end of the cylindrical portion (27a), and a cylindrical portion ( 27a) and an annular claw portion (27c) protruding radially inward from the other end portion. An insertion hole (27d) is formed at the center of the disk-shaped blocking part (27b). The pressing member (27) covers the flange (25b) and the elastic member (26) of the conductive member (25), and the claw portion (27c) is provided so as to be caught by the end surface of the flange (25b). The nozzle body (21) fixed to the elastic member (26) is inserted through the insertion hole (27d) of the blocking portion (27b). The insertion hole (27d) is formed in such a size that the nozzle body (21) can be inserted, but the user's finger or the like cannot be inserted.

  As described above, the nozzle body (21) is fixed to the fixing member (26a) of the elastic member (26), and the nozzle body (21) is inserted into the through hole (26d) through the elastic member (26). In the large diameter portion (26f) of the through hole (26d). Then, the elastic member (26) is pressed by the pressing member (27) so that the nozzle body (21) is inserted through the insertion hole (27d).

  With this configuration, when an axial force (toward the container (11)) is applied to the nozzle body (21), the fixing member (26a) of the elastic member (26) to which the nozzle body (21) is fixed is removed. Thus, a force is applied to the coil spring (26b), and the coil spring (26b) contracts. Along with this, the nozzle body (21) moves backward toward the container (11) in the axial direction to reach the retracted position (see FIG. 8B). On the other hand, when the force applied to the nozzle body (21) is removed, the elastic member (13) is restored, and the nozzle body (21) moves forward from the retracted position in the axial direction to the protruding position. Return (see FIG. 8A).

  Thus, the nozzle body (21) is attached to the container (11) via the nozzle support part (22) having the elastic member (26) configured to be elastically deformable in the axial direction. Therefore, the nozzle body (21) is movably supported by the nozzle support portion (22) to a predetermined protruding position and a retracted position that is retracted from the protruding position toward the container (11) with respect to the axial direction. .

  The nozzle support part (22) has the tip (21a) of the nozzle body (21) at the protruding position located outside the outer surface, while the tip (21a) of the nozzle body (21) at the retracted position is located more than the outer surface. It is comprised so that it may be located inside. That is, the tip (21a) of the nozzle body (21) protrudes from the outer surface of the pressing member (27) of the nozzle support portion (22) at the protruding position, while from the outer surface of the pressing member (27) at the retracted position. Is also fixed to the elastic member (26) of the nozzle support (22) so as to be retractable to the inside. In this way, the state of the electric field formed at the tip (21a) of the nozzle body (21) during use can be stabilized by protruding the nozzle body (21) outward from the outer surface of the nozzle support (22). it can. On the other hand, if the user accidentally touches the tip (21a) of the nozzle body (21), the nozzle body (21) is located at the same position as the outer surface of the nozzle support section (22) or inside the outer surface. On the other hand, the user's finger abuts against the outer surface of the nozzle support portion (22), thereby preventing the nozzle body (21) from being stuck in the finger.

  As described above, even when the nozzle support portion (22) according to the second embodiment is used, the same effects as those of the first embodiment can be obtained.

<< Embodiment 3 of the Invention >>
The electrostatic spraying device (1) of the third embodiment is obtained by changing the configuration of the spray cartridge (10) of the first embodiment. Since other configurations are the same as those in the first embodiment, description thereof will be omitted, and only the configuration and operation of the spray cartridge (10) will be described below.

  As shown to FIG. 9 (A), the spray cartridge (10) which concerns on Embodiment 3 is provided with the container (11) and the nozzle part (20).

  The said container (11) is formed in the flat bag shape similarly to Embodiment 1. FIG. In the second embodiment, the container (11) has a mouth (11a) formed in a cylindrical shape, a container body (11b) formed by overlapping two sheets, and the mouth (11a) and the container. A bellows part (11c) provided between the main body (11b) and connecting the two is provided. A nozzle part (20) is attached to the mouth (11a) of the container (11).

  The bellows portion (11c) is formed in an annular shape with a mountain fold portion that is formed in an annular shape and protrudes toward the outer peripheral side, and a valley fold portion that is formed in an annular shape and continues to the mountain fold portion and protrudes toward the inner peripheral side. Are alternately formed. With such a configuration, the bellows portion (11c) is configured to be extendable and contractible in the axial direction.

  The nozzle part (20) includes a nozzle body (21) formed like a needle like the first embodiment, and a conductive member (28) through which the nozzle body (21) is inserted and fixed. Yes. The conductive member (28) is made of a conductive material such as metal, and constitutes a voltage applying means for applying a charge (applying a high voltage) to the liquid in the container (11). The conductive member (28) is inserted into the mouth (11a) of the container (11), and is integrally formed with the insertion portion (28a) that contacts the liquid in the container (11) and the outer end of the insertion portion (28a). And a flange (28b) formed larger in diameter than the mouth (11a) of the container (11). The conductive member (28) has a flange (28b) electrically connected to a power supply unit (not shown), and applies a high voltage to the liquid in the container (11) through the insertion unit (28a). It is configured. The conductive member (28) has a through hole formed from the end surface on the insertion portion (28a) side to the end surface on the flange (28b) side, and the nozzle body (21) is inserted into the through hole to move. It is fixed impossible.

  With such a configuration, the nozzle body (21) is protruded from the container (11) by the conductive member (28), the mouth (11a) and the bellows part (11c) of the container (11). It is supported so as to be movable between a position and a retracted position retracted toward the container (11) from the protruding position. That is, in the third embodiment, the conductive member (28), the mouth (11a) of the container (11), and the bellows part (11c) support the nozzle according to the present invention so as to be movable between the protruding position and the retracted position ( 29).

  As described above, in Embodiment 3, the nozzle body (21) is fixed to the container (11) through the conductive member (28) so as not to move. However, since the bellows part (11c) that can be expanded and contracted in the axial direction of the nozzle body (21) is formed in the container (11), the nozzle body (21) can move in a predetermined manner as the bellows part (11c) expands and contracts. With respect to the protruding position and the axial direction, it moves in the axial direction from the protruding position to the retracted position retracted toward the container body (11b).

  Specifically, when an axial force (toward the container body (11b)) is applied to the nozzle body (21), the container body is brought into the mouth (11a) via the nozzle body (21) and the conductive member (28). (11b) Side force is transmitted. Thereby, the distance between the adjacent mountain folds of the bellows part (11c) and the distance between the adjacent valley folds are reduced, and the bellows part (11c) contracts. Along with this, the nozzle body (21) moves backward toward the container (11) in the axial direction to reach the retracted position (see FIG. 9B).

  On the other hand, when the force applied to the nozzle body (21) is removed, the bellows part (11c) is restored to its original shape. That is, the distance between the adjacent mountain fold portions and the distance between the adjacent valley fold portions of the bellows portion (11c) expands to the original state. Along with this, the nozzle body (21) advances from the retracted position in the axial direction and returns to the protruding position (see FIG. 9A).

  As described above, the nozzle body (21) is attached to the container (11) so as to be movable in the axial direction between the protruding position and the retracted position as the bellows part (11c) of the container (11) expands and contracts. Similarly, if the user accidentally touches the tip (21a) of the nozzle body (21), the nozzle body (21) can be retracted to avoid injury, while the user's hand can The spray cartridge (10) can be easily configured to easily return to the protruding position when it is separated from 21).

<< Embodiment 4 of the Invention >>
The electrostatic spraying device (1) of the fourth embodiment is obtained by changing the structure of the spray cartridge (10) and the structure for attaching the spray cartridge (10) to the main body (40). Hereinafter, the structure of the spray cartridge (10) and the mounting structure of the spray cartridge (10) will be described with reference to FIG.

  The spray cartridge (10) according to Embodiment 4 includes a container (11) and a nozzle portion (20).

  The said container (11) is formed in the flat bag shape similarly to Embodiment 1. FIG. The container (11) is formed in the same manner as in the first embodiment. And the nozzle part (20) is attached to the opening | mouth (11a) of a container (11).

  The nozzle part (20) includes a nozzle body (21) formed like a needle like the first embodiment, and a conductive member (30) through which the nozzle body (21) is inserted and fixed. Yes. The conductive member (30) is made of a conductive material such as metal, and constitutes a voltage applying means for applying a charge (applying a high voltage) to the liquid in the container (11). The conductive member (30) is inserted into the mouth (11a) of the container (11), and is integrally formed with the insertion part (30a) contacting the liquid in the container (11) and the outer end of the insertion part (30a). And a flange (30b) formed larger in diameter than the mouth (11a) of the container (11). The conductive member (30) has a flange (30b) electrically connected to a power supply unit (not shown), and applies a high voltage to the liquid in the container (11) via the insertion unit (30a). It is configured. The conductive member (30) has a through hole extending from the end surface on the insertion portion (30a) side to the end surface on the flange (30b) side, and the nozzle body (21) is inserted into the through hole to move. It is fixed impossible.

  Further, the spray cartridge (10) is not fixed so as not to move during use by the lock member as in the first embodiment. In the fourth embodiment, the axial direction of the nozzle body (21) is supported by the support member (60). It is supported to move freely.

  Specifically, as shown in FIGS. 10A and 10B, the support member (60) is a slide mechanism (61) that supports the container (11) to be slidable in the axial direction of the nozzle body (21). And a spring member (62) for urging the slide mechanism (61) so that the nozzle body (21) is positioned at a predetermined reference position (position shown in FIG. 10A).

  The slide mechanism (61) has a support portion (63) that sandwiches and supports the container (11), and the support portion (63) is configured to be slidable in the axial direction of the nozzle body (21). Has been. The spring member (62) is interposed between the support portion (63) and the housing body (41a) of the housing (41).

  In the fourth embodiment, as in the first embodiment, the container (11) is configured to be compressed by being sandwiched between the pressure stage (52) and the partition plate (53). (See FIG. 5). Therefore, in Embodiment 4, the said support part (63) is comprised by the pressurization stage (52) and the partition plate (53). The pressure stage (52) and the partition plate (53) as the support portion (63) are both configured to be slidable in the axial direction of the nozzle body (21).

  With such a configuration, for example, when a user accidentally touches the tip (21a) of the nozzle body (21) and axial force (toward the container (11)) is applied to the nozzle body (21), Force is transmitted to the support portion (63) (the pressure stage (52) and the partition plate (53)) via the conductive member (30) and the container (11). Thereby, the container (11) slides in the axial direction of the nozzle body (21) together with the support portion (63) and moves backward. As a result, the nozzle body (21) also moves backward from the predetermined reference position in the axial direction to reach the retracted position (see FIG. 10B).

  On the other hand, when the user's hand leaves the nozzle body (21) and the force applied to the nozzle body (21) is removed, the container (11) together with the support portion (63) is restored by the restoring force of the spring member (62). ) Is restored to the reference position. Accordingly, the nozzle body (21) advances from the retracted position in the axial direction and returns to the reference position (see FIG. 10A).

  As described above, in the fourth embodiment, the container (11) is supported by the support member (60) so as to be slidable between the reference position and the retracted position in the axial direction of the nozzle body (21). As a result, even if the user accidentally touches the tip (21a) of the nozzle body (21), the container (11) moves back in the axial direction of the nozzle body (21). Since (21) also moves back in the axial direction, it is possible to prevent the user from being injured. Further, by configuring the support member (60) by the slide mechanism (61) and the spring member (62), when the force applied to the nozzle body (21) is removed, the spring member (62) The nozzle (21) can be easily restored to the reference position by returning the container (11) together with the slide mechanism (61) to the original position by the restoring force. In addition, with a simple configuration, it is possible to realize a structure that prevents the user from being injured when the user accidentally touches the tip (21a) of the nozzle body (21).

<< Variation 1 of Embodiments 1 to 4 of the Invention >>
By the way, when the container (11) is filled with the liquid, a little air is mixed. Therefore, when the liquid is supplied to the extremely small diameter liquid passage formed inside the nozzle body (21), there is a possibility that bubbles are also mixed. In such a case, even if the inside of the container (11) is pressurized to push out the liquid, the bubbles in the liquid passage are compressed, so that the liquid is not transported and is not discharged (so-called air lock state). There is a fear.

  Therefore, in the electrostatic spraying device (1) according to the modified example 1, the configuration of the spray cartridge (10) is changed so that bubbles do not enter the liquid passage of the nozzle body (21). Only the changed part will be described below.

  As shown in FIG. 11, in the spray cartridge (10) according to the first modification, the nozzle body (21) has one end (21b) (the end on the container (11) side) in the container (11). It is formed long so as to be positioned. Specifically, in Modification 1, the one end (21b) of the nozzle body (21) is divided into an upper layer portion and a middle layer portion when the container (11) is equally divided into an upper layer portion, a middle layer portion, and a lower layer portion. It extends to near the boundary.

  Further, in the spray cartridge (10) according to the first modification, the container (11) is constituted by a member that has been subjected to affinity processing so as to have affinity for the liquid filled in the inner wall surface. . Specifically, the polymer non-generated plasma treatment is performed on the inner wall surface. In this manner, the container (11) has an inner surface constituted by a member (in this embodiment, a member subjected to hydrophilic treatment) having an affinity with the liquid (in this embodiment, water) filled in the inner wall surface. However, the bubbles mixed in the container (11) are less likely to be adsorbed on the inner wall surface. Therefore, the bubbles in the container (11) rise toward the upper layer of the container (11) by buoyancy without being adsorbed on the inner wall surface.

  In the container (11), an air reservoir (66) is formed above the one end (21b) of the nozzle body (21) to collect bubbles mixed in the container (11). Specifically, in the first modification, the upper surface of the container (11) that is formed in a rectangular shape in the first to fourth embodiments and the upper surface is inclined with respect to the installation surface is used as the installation surface. The air reservoir (66) is formed by inclining toward the upper corner portion so that the inclination relative to the upper portion is further increased, while the corner portion is further bulged upward. The shape of the air reservoir (66) may be any shape as long as a space for storing air is secured above the one end (21b) of the nozzle body (21).

  As described above, in the electrostatic spraying device (1) according to the first modification, the inner wall of the container (11) is configured by the member having affinity for the liquid to be filled, and the container (11) One end (21b) of the nozzle body (21) is disposed, and an air reservoir (66) is formed above the one end (21b) of the nozzle body (21). Therefore, even if air bubbles are mixed in the container (11), the air bubbles do not adsorb on the inner wall of the container and rise upward due to buoyancy, and are higher than one end (21b) of the nozzle body (21). Collected in the upper air pocket (66). Therefore, according to the electrostatic spraying device (1) according to the first modification, it is possible to prevent bubbles in the container (11) from flowing into the liquid passage of the nozzle body (21) with a simple configuration. . Therefore, a so-called air lock state in the nozzle body (21) can be avoided, and the liquid can be reliably sprayed from the tip (21a) of the nozzle body (21).

  In addition, as the hydrophilic treatment of the inner wall of the container (11), in addition to the polymer non-generation plasma treatment, in addition to the plasma treatment such as polymer production plasma treatment, plasma jet treatment, glow discharge treatment, etc., a solvent or the like is used. The inner wall surface may be dissolved or eroded and roughened, or a hydrophilic polymer chain may be bonded to form a graft copolymer. Further, instead of modifying the inner wall surface, the inner wall surface may be coated with a hydrophilic material such as titanium oxide. Furthermore, hydrophilicity may be further enhanced by processing the inner wall surface to which a hydrophilic material has been added to add surface roughness.

<< Variation 2 of Embodiments 1 to 4
In the said Embodiment 1-4, the spray cartridge (10) was provided with the container (11), the nozzle part (20), and the nozzle base (33), and these were assembled | attached integrally. When the spray cartridge (10) is replaced, the spray cartridge (10) including the nozzle base (33) is integrated with the housing (41) by pulling the take-out knob (3a) of the nozzle base (33). On the other hand, a new spray cartridge (10) including the nozzle base (33) was also integrally mounted on the housing (41). However, the configuration and replacement method of the spray cartridge (10) are not limited to this.

  For example, the spray cartridge (10) may not include the nozzle base (33). That is, you may be comprised only by the container (11) and the nozzle part (20). And when exchanging such a spray cartridge (10), as shown in FIG. 12, it is good also as positioning using a positioning member (70).

  Specifically, as shown in FIG. 12A, the nozzle body (21) is brought closer to a positioning member (70) made of a plate-like member bent in a mountain shape provided in the housing (41). Move the spray cartridge (10). Then, as shown in FIG. 12B, after the nozzle body (21) is brought into contact with the positioning member (70), the fixing member (71) provided on the housing (41) and configured to be movable is mounted. The nozzle body (21) and the positioning member (70) are moved. Then, as shown in FIG. 12C, the fixing member (71) is brought into contact with the nozzle main body (21) and the nozzle main body (21) is sandwiched between the positioning member (70), whereby the nozzle Fix the body (21) in place.

  In addition, when installing the spray cartridge (10) in the housing (41), it is necessary to accurately position it in order to secure a space for generating a sufficient electric field for spraying the liquid. However, for example, if the container (11) is positioned by being fitted in the housing (41), the container (11) and the housing (41) side accommodating portion for accommodating the container (11) are precisely manufactured. Must be done and costly.

  However, as described above, by providing the positioning member (70) having a simple structure, the tip (21a) of the nozzle body (21) can be accurately positioned. Thereby, according to the said structure, a spray cartridge (10) can be easily and cheaply installed in the position which can ensure the space for producing | generating a sufficient electric field for liquid spray.

<< Other Embodiments >>
In each of the above embodiments, the bubble diameter in the container (11) may be reduced by adding an additive that increases the surface tension of the liquid to the liquid filled in the container (11). Further, a water liquid containing hyaluronic acid or a water liquid of theanine may be used as the liquid to be sprayed. In addition, an aqueous solution of an antioxidant such as catechin or proanthocyanidin may be used. In addition, a liquid containing a substance having a function of suppressing the growth of microorganisms or a function of killing microorganisms, or a liquid containing a substance that does not bromide by a chemical change due to neutralization of odor molecules in the air may be used. . Moreover, you may use the liquid containing various fragrance | flavor, a pest repellent, etc.

  In each of the above embodiments, the spray unit according to the present invention is configured by the spray cartridge (10) in which at least the container (11) and the nozzle portion (20) can be integrally replaced. The spray unit is not limited to this. For example, a spray cartridge in which only the container (11) is configured to be replaceable may be used.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

  As described above, the present invention relates to a spray unit and an electrostatic spray apparatus for spraying a liquid, and is particularly useful for a spray unit and an electrostatic spray apparatus provided with a needle-like nozzle.

1 Electrostatic spraying device
10 Spray cartridge (spray unit)
11 containers
11c bellows
13 Elastic member
14 Holding member (cover)
14d through hole
21 Nozzle body
21a Tip
22 Nozzle support (support)
26 Elastic member
27 Holding member (cover)
27d Through hole
29 Supporting part
41 Housing
60 Support member
61 Slide mechanism
62 Spring member

Claims (8)

A container (11) filled with a liquid, and a needle-like nozzle (21) having a liquid passage formed therein for communicating between the inside and the outside of the container (11). A spray unit provided in the electrostatic spraying device (1) for applying the voltage of the pressure and pressurizing the inside of the container (11) to spray the liquid from the tip (21a) of the nozzle (21),
A support portion for supporting the nozzle (21) so that the nozzle (21) can move between a protruding position protruding from the container (11) and a retracted position retracted from the protruding position toward the container (11). A spray unit comprising (22, 29). In claim 1,
The spray unit, wherein the support portion (22) includes an elastic member (13, 26) to which the nozzle (21) is fixed and elastically deformable in an axial direction of the nozzle (21). In claim 2,
The support portion (22) has a cover (14, 27) in which an insertion hole (14d, 27d) through which the nozzle (21) is inserted is formed and covers the elastic member (13, 26). The spray unit characterized in that the tip (21a) of the nozzle (21) at a position is located inside the outer surface of the cover (14, 27). In claim 1,
The spray unit, wherein the support portion (29) includes a bellows portion (11c) formed in the container (11) and capable of extending and contracting in the axial direction of the nozzle (21).   A spray unit according to any one of claims 1 to 4, comprising: applying a predetermined voltage to the liquid in the container (11) and pressurizing the inside of the container (11) to supply the liquid to the tip of the nozzle (21). Electrostatic spraying device to spray from. A housing (41), a container (11) housed in the housing (41) and filled with a liquid, a liquid passage attached to the container (11) and communicating between the inside and the outside of the container (11) A needle-like nozzle (21) formed inside, applying a predetermined voltage to the liquid in the container (11) and pressurizing the container (11) to supply the liquid to the nozzle (21). An electrostatic spraying device for spraying from the tip (21a),
The container (11) is movable in the axial direction of the nozzle (21) so that the nozzle (21) is movable between a predetermined reference position and a retracted position that is retracted in the axial direction from the reference position. An electrostatic spraying device comprising a supporting member (60) for supporting. In claim 6,
The support member (60) includes a slide mechanism (61) that slidably supports the container (11) in the axial direction of the nozzle (21), and a space between the slide mechanism (61) and the housing (41). And a spring member (62) for biasing the slide mechanism (61) so that the nozzle (21) is positioned at the reference position. In claim 1,
While the inner wall of the container (11) is constituted by a member having an affinity for the liquid filled in the container (11),
In the container (11), one end (21b) of the nozzle (21) is disposed, and an air reservoir in which bubbles in the container (11) accumulate above the one end (21b) of the nozzle. (66) The electrostatic spraying device characterized by the above-mentioned.

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