FR2677617A1 - DEVICE FOR SPRAYING A LIQUID LIKELY TO CURE BY DRYING, PARTICULARLY A LACQUER, AND PUSH-BUTTON FOR SUCH A DEVICE. - Google Patents

Abstract

The invention relates to a device for spraying a liquid capable of hardening on drying, contained in a container (2) provided with an opening (3) equipped with a pump (5) suitable for being actuated using a push button (9) surmounting the pump body (6), and passing the pumped liquid through a diffuser (10), comprising a spray nozzle (13), provided in the push button. The device comprises means (E) for expelling the liquid contained inside the diffuser (10) at the end of each use, these expulsion means (E) being actuated by the push button (9), and integrated, at least in part, in this push button.

Description

DEVICE FOR SPRAYING A LIQUID

  LIKELY TO CURE DRY, IN PARTICULAR

  OF A LACQUER, AND PUSH BUTTON FOR SUCH A DEVICE.

  The invention relates to a device for spraying a liquid capable of hardening on drying, contained in a container provided with an opening equipped with a pump suitable for being actuated using a button. pusher surmounting the pump body, and passing the pumped liquid through a diffuser, comprising a spray nozzle, provided

in the push button.

  The invention relates more particularly, but not exclusively, to such a device for

  spraying a hair spray.

  We know that a major drawback of such a device lies in its plugging due to drying.

  and hardening of the liquid that remains in the diff-

fuser after use.

  This problem has already been mentioned in FR-A-2 070 951 which however relates to a spraying device of a type different from that of the invention since it comprises an elastic bulb capable of ejecting air in the vicinity of the exit of a dip tube so as to suck, by suction effect, the liquid which is thus sprayed in the form of a cloud of fine droplets suspended in the air. The spraying device targeted by the invention comprises a pump making it possible to aspirate and

  spray only the liquid.

  The object of the invention is, above all, to provide a device of the type defined above in which the risks of clogging by drying of the liquid are

  considerably reduced, and preferably eliminated.

  The invention further aims to provide a spraying device which is of reliable use and

  of a simple and economic realization.

  According to the invention, a device for spraying a liquid capable of hardening on drying, of the type defined above, is characterized in that it comprises means for expelling the liquid contained inside the diffuser at the end of each use, these means of expulsion being actuated by the push button, and integrated into the

  less in part, in this push button.

  Advantageously, the means for expelling the liquid comprise means for compressing air actuated by pressing the push-button, and means for evacuating the compressed air through the diffuser capable of being actuated at the end.

push button down.

  Preferably, the air compression means comprise a deformable envelope fixed on the edge of the opening of the container and connected to the push button so as to determine a closed chamber, the push button acting in the manner of a piston during its sinking, to compress the air

contained in this room.

  The means for discharging the compressed air comprise: passage means provided in the push button communicating, at one end, with the said chamber and opening, at their other end, in the diffuser towards the said nozzle; means for closing these passage means and means for controlling the opening of said means for closing in

  end of push-button depressing.

  The means of passage include, before-

  tagging, a longitudinal pipe parallel to the axis of the container and to the direction of insertion of the push button, and a transverse pipe -connected, on one side, to a channel of the diffuser for the outlet of the liquid towards the nozzle and communicating, on the other side, with a housing connected to the aforesaid longitudinal pipe, the aforesaid means

  shutter being arranged in this housing.

  The closure means preferably comprise a valve, the seat of which is located in the abovementioned housing, this valve being subjected to the action of elastic means capable of applying it to its seat against the pressure of compressed air in the chamber, the force developed by these elastic means being sufficient to keep this valve closed despite

air pressure.

  The means for controlling the opening of the shutter means may include a stop suitable for coming to bear against the valve to move it away from its seat at the end of the driving stroke.

of the push button.

  The stop can be constituted by a rod substantially parallel to the axis of the container but offset radially relative to this axis, suitable for engaging in said longitudinal pipe which

  opens into the housing fitted with the valve.

  The deformable wall delimiting the closed chamber is advantageously constituted by an accordion bellows, made of a flexible material, comprising at its lower part a flange covering the edge of the opening of the container and connected to its other

  end sealed to the push button.

  The invention also relates to a push button for a device as defined

previously.

  The invention consists, apart from the arrangements set out above, of a certain number of other arrangements which will be more explicitly discussed below in connection with an exemplary embodiment described with reference to the attached drawings, but who

is in no way limiting.

  Figure 1 of these drawings is a schematic section of the upper end of a liquid container equipped with a device for the

  spraying according to the invention.

  Figure 2 shows the device of the

  Figure 1 during spraying.

  Finally, FIG. 3 shows, similarly to FIG. 1, the device at the end of a use,

  the push button being fully depressed.

  Referring to Figure 1 of the drawings, one can see a device 1 for spraying a liquid L contained in a container 2 constituting a bottle The liquid L is capable of hardening on drying and is composed, for example, of a volatile solvent and a product dissolved in this solvent An example of such a liquid L is that of lacquers

  intended to be applied to the hair.

  The container 2, made for example of alloy

  light age, has an opening 3 in the upper part

whose edge 4 is rolled.

  The opening 3 is equipped with a manual pump 5, schematically represented. The body 6 of the pump is blocked in a cup 3 a crimped on the

  edge 4 of opening 3, while a member 7 of com-

  the piston of the pump protrudes upwards A dip tube 8 extending from the pump 5

  extends to the bottom of container 2.

  A push button 9 surmounting the body of

  pump and supported by a centering flange

  trage, against the control member 7, is provided to enable the pump 5 to be actuated by depressing the control member 7 This member 7 is recalled upwards by elastic means not visible in the drawing. The control member 7 is crossed by a passage (not visible in the drawing) which allows the pumped liquid to pass through a diffuser 10 provided in the push button 9 This diffuser 10 comprises an axial channel 11 starting from the end upper of the control member 7 and communicating with the passage provided in this member 7; in part

  high, channel 11 communicates with a transverse channel

  sal 12 opening into a spray nozzle 13

  provided on the outer side wall of the button-

  pusher 9 After each use, liquid has

  tendency to remain in the diffuser 10, in particular

  link in the transverse channel 12 and the nozzle 13 En

  drying, the liquid would harden and eventually provo-

  clogged spray device

  so cleaning should be done to

  reset the correct operation.

  To avoid this particularly annoying drawback, the invention provides means E for expelling the liquid contained inside the diffuser 10, and in particular inside the

  channel 12 and nozzle 13, at the end of each use

  tion; these expulsion means E are actuated by the push button 9 and integrated, at least in part,

in this push button.

  The means E for expelling the liquid include

  there are means C for compressing air actuated by pressing the push-button 9, and means F for evacuating the compressed air through the channel 12 of the diffuser and the nozzle 13; these means of evacuation F

  are put into action at the end of pressing the button-

pusher 9.

  The air compression means C include

  a deformable casing 14 advantageously consists of an accordion bellows 15, of flexible material, in particular of elastomer material The bellows 15 comprises, at its lower part, a flange 16 coming to cover the edge 4 of the opening and to hang thereon, so that the bellows 15 is thus

fixed on this edge 4.

  The other end 17 of the bellows 15, in the form of a cylindrical skirt, is tightly connected to the push button 9, by engagement with tightening in an annular slot provided at the lower part of this push button The bellows 15 delimits a chamber closed 18 in which are the pump body 6 and the control member 7 The push button 9 which closes the chamber 18 upwards acts like a piston when it is pressed in and compresses the air contained in the chamber 18. The means F for evacuating the compressed air comprise passage means, provided in the push button 9, formed by a longitudinal pipe 19 parallel to the axial channel 11 and to the direction of insertion of the button pusher, and a transverse pipe 20 connected, on one side, to the transverse channel 12 of the diffuser and communicating,

  the other side, with a housing 21 connected to the pipe-

  tion 19 The housing 21 opens on the upper surface of the push button 9 A plug 22 is

  designed to close the housing 21 to the outside.

  The discharge means F also comprise means for closing the channel 19 constituted by a valve 23, with a ball 24, the seat of which is located

  in housing 21, at the end of canal 19 A res-

  fate 25, bearing against the bottom of the plug 22, applies the ball 24 against its seat so as to

  close the communication between channel 19 and the box-

  ment 21 The force developed by spring 25 is sufficient to keep ball 24 in position

  closed, pressing against its seat, when the button-

  pusher 9 is pressed and the air is compressed in

room 18.

  The means F for evacuating the compressed air further comprise means 26 for controlling the opening of the valve 23 at the end of insertion of the

push button 9.

  The control means 26 comprise a stop constituted by a rod 27, integral with an annular ring 27 a, for example made of plastic,

  blocked in the cup 3 a The rod 27 is sensitive-

  parallel to the axis of the container, but offset radially relative to this axis The rod 27 is suitable for entering the channel 19 with sufficient clearance to allow air to pass The length of the rod 27 is such that at the end of pressing the push button 9 it comes into contact with the ball 24 and;

  its seat, thus ensuring the opening of the valve 23.

  An air return valve, not visible in the drawing, is provided to allow air to enter the chamber 18 when it is increasing in volume, and to close and

  prevent any escape of air during compression.

  However, the operation of the device

spray is as follows.

  In the rest position, the device 1 is in the configuration shown in FIG. 1 The chamber 18 contains air at atmospheric pressure and the valve 23 is closed When the user presses the push button 9, as

  shown in Figure 2, this push button 9 des-

  ash and pushes the control member 7 causing the pumping of the liquid L which crosses the axial channel it then goes through the transverse channel 12 towards the spray nozzle 13 to exit in the form of a jet 28 of fine droplets The valve 23 remains closed and the air trapped in chamber 18 is compressed

by pushing the pusher 9.

  At the end of pressing the push-button 9, as illustrated in FIG. 3, the rod 27 comes to lift the ball 24 which allows the compressed air from the chamber 18 to escape, through the transverse channel 2, to through the other transverse channel 12 and through the nozzle 13 pushing outwards the liquid which

  may have remained in channel 12 and nozzle 13.

  At the end of each button press-

  pusher 9, there is thus sweeping of the remaining liquid which is expelled towards the outside so that the risks of clogging of the spraying device as a result of drying of the remaining liquid are

  considerably reduced or even eliminated.

  When the push button 9 is released, it

  goes up under the action of the elastic means stressed

  both organ 7 Chamber 18 increases in volume and fills with air, coming from outside, through

  the air return valve, not visible on the

sin.

Claims (7)

  1 Device for spraying a   liquid that can harden when drying, especially   bind a lacquer, contained in a container (2) provided with an opening (3) equipped with a pump (5) suitable for   be actuated using a push button (9) on-   mounting the pump body (6), and passing the pumped liquid through a diffuser (10), comprising   a spray nozzle (13), provided in the button-   plunger, characterized in that it comprises means (E) for expelling the liquid contained in   inside the diffuser (10) at the end of each use, these expulsion means (E) being actuated by the push button (9), and integrated, at least in part, in this push button.   2 Device according to claim 1, characterized in that the expulsion means (E) of the liquid comprise means (C) for compressing air actuated by the depressing of the push button (9), and means ( F) evacuation of the compressed air through the diffuser (10) suitable for being put in   action at the end of pressing the push button (9).   3 Device according to claim 2,   characterized by the fact that the means (C) of compressing   air sion include a deformable envelope (14) fixed on the edge (4) of the opening (3) of the container and connected to the push button (9) so as to determine a closed chamber (18), the button pusher (9) acting in the manner of a piston when it is depressed, to compress the air contained in this room (18).   4 Device according to claim 2 or 3, characterized in that the means (F) for discharging the compressed air comprise: passage means (19, 20) provided in the communicating push button, at one end, with the aforesaid chamber (18) and opening, at their other end, in the diffuser (10) towards the aforesaid nozzle (13); shutter means (23) of these passage means and control means (26) of the opening of said shutter means (23) at the end push button down.   Device according to claim 4, characterized in that the passage means (19,) comprise a longitudinal pipe (19) parallel to the axis of the container (2) and to the direction of insertion of the push button, and a transverse pipe (20) connected, on one side, to a channel (12) of the diffuser (10) for the outlet of the liquid towards the nozzle (13) and communicating, on the other side, with a   housing (21) connected to the aforesaid longitu-   dinal (19), the above sealing means (23) being arranged in this housing.   6 Device according to claim 5, characterized in that the closure means comprise a valve (23) whose seat is located in the above-mentioned housing (21), this valve (23) being subjected to the action of elastic means (25) suitable for applying it to its seat against the pressure of compressed air in the chamber (18), the force developed by these elastic means being sufficient to keep this valve (23) closed despite the pressure d 'air. 7 Device according to claim 6,   characterized in that the means (26) for com-   request for the opening of the shutter means comprising   a stop (27) suitable for coming to bear against the valve (23) to move it away from its seat at the end of   push-button pushing stroke (9).   8 Device according to claim 7, characterized in that the stop (27) is constituted by a rod substantially parallel to the axis it of the container but offset radially relative to   this axis, suitable for engaging in said longitudinal pipe (19) which opens into the housing (21) equipped with the valve.   9 Device according to any one of claims 3 to 8, characterized in that   the deformable envelope delimiting the closed chamber (18) is constituted by an accordion bellows (15), made of a flexible material, comprising at its lower part a collar (16) covering the edge of the opening (3) of the container and connected to his other   end (17) sealingly to the push button (9).   Push button (9) for a device   spray according to any one of the preceding claims.