Liquid Dispenser

1. Field of the Invention

The present invention relates to a liquid dispenser, and more particularly to a liquid dispenser which has a hollow shaft axially movable within a receptacle for receiving a portion of liquid soap received within the receptacle and a hollow dispenser having a grill defined therein for allowing the liquid soap from the shaft to flow out from an outlet of the receptacle.

2. Background

Liquid dispensers are well known in the art and very popular all over the world. A U.S. Pat. No. 5,605,256 filed on Dec. 20, 1994 and issued to Fan discloses a fluid dispenser apparatus of the type.

Due to the convenience of the liquid dispenser, people are more and more attached to it. As one skilled in the art will appreciate that pushing inward a button toward a receptacle of the liquid dispenser will thus force the liquid soap received within the receptacle to flow out from an outlet of the receptacle. However, because the liquid soap has a certain degree of viscosity and a diameter of the shaft is slightly smaller than a diameter of the receptacle and also due to the shaft being made solid, pushing the button will become very difficult, since pushing the shaft will have to overcome the viscosity of the liquid soap. That is, because the conventional shaft of the liquid dispenser is made solid, pushing the shaft to force the liquid soap out from the outlet of the receptacle often causes a lot of trouble to the users, thus improvement and/or alternation thereof is necessary.

The present invention provides an improved liquid dispenser to obviate and/or mitigate the aforementioned problems.

The primary object of the invention is to provide an improved liquid dispenser which has a hollow shaft from which a user is able to easily force the liquid soap received within a receptacle of the dispenser out from an outlet.

Other novel features and advantages of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

FIG. 1 is a perspective view of a preferred embodiment of a liquid dispenser of the present invention;

FIG. 2 is an exploded view of the liquid dispenser as shown in FIG. 1;

FIG. 3 is a schematic view showing a combination of the liquid dispenser of the invention;

FIG. 4 is a schematic view showing a result caused by a movement of a button of the invention;

FIG. 5 is a schematic view showing another preferred embodiment of the invention.

Referring to FIGS. 1 and 2, it is noted that a liquid dispenser constructed in accordance with the invention is shown. The liquid dispenser of the invention has a reservoir 10, a tubular receptacle 20 communicating with the reservoir 10 and a button 60 detachably connected to the tubular receptacle 20. The reservoir 10 has an outlet 11 having threadings 12 formed on an outer periphery thereof. A tubular sleeve 13 for movably receiving therein a ball 15 has an opening 14 communicating with the outlet 11. A ball seat 16 is rested on a shoulder 21 (as shown in FIG. 3) formed with the tubular receptacle 20 when the tubular receptacle 20 is threadingly connected with the outlet 11. The tubular receptacle 20 has laterally defined therein a channel 22 communicating with the opening 14 of the tubular sleeve 13 and a nozzle 23 communicating with the channel 22. The tubular receptacle 20 is sealed on one end face (not shown) thereof, such that a coil spring 24 is able to be compressibly received between the sealed end face of the tubular receptacle 20 and a hollow shaft 30 when inserted into the channel 22 of the tubular receptacle 20. The hollow shaft 30 has a Y-shaped end 301 connecting with an end of the coil spring 24, a first portion 31 securely connected with the Y-shaped end 301, a second portion 33 securely connected with the first portion 31 via a plurality of ribs 34 laterally and securely disposed therebetween and a seal 32 detachably mounted on the first portion 31 to accomplish a water-tight seal between the hollow shaft 30 and an inner periphery of the tubular receptacle 20. Due to the provision of the ribs 34, a plurality of through holes 35 are defined to communicate with an internal space of the hollow shaft 30. A first O ring 36 is securely disposed onto the first portion 31 of the hollow shaft 30 and received within a hollow sleeve 40 to have a water-tight relationship between the hollow sleeve 40 and an outer periphery of the hollow shaft 30 when the hollow shaft 30 is slidably inserted into the hollow sleeve 40. The hollow sleeve 40 has two second O rings 41 spatially mounted thereto with respect to each other to ensure the liquid received within the tubular receptacle 20 does not leak out therefrom and a grill 42 laterally formed therewith such that a plurality of holes 43 are defined therein to communicate with the channel 22 and the nozzle 23 of the tubular receptacle 20 when received within the channel 22 of the tubular receptacle 20. It is to be noted that one of the two second O rings 41 is mounted to ensure that the liquid coming out from the holes 43 does not leak out from the hollow sleeve 40 in a direction where a button 60 is movably connected with respect to the tubular receptacle 20. Between the button 60 and the hollow sleeve 40, a plurality of secondary sleeves 50 are sequentially mounted onto the second portion 33 of the hollow shaft 30 to function as a cushion and facilitate the sealing effect of the O ring 41.

Referring to FIGS. 3 and 4, when the liquid dispenser of the inoutletion is assembled, as one skilled in the art will appreciate that the liquid received within the reservoir 10 will flow into the tubular receptacle 20 due to the effect of gravity via the outlet 11, the tubular sleeve 13 and the ball seat 16. The liquid received within the tubular receptacle 20, due to its viscosity and internal force, will not freely drip out from the nozzle 23. Furthermore, a free end 231 of the outlet 23 is cone shaped so that the liquid is further prevented from freely dripping out therefrom. The coil spring 24 is compressibly received between the end face of the tubular receptacle 20 and the Y-shaped end 301 of the hollow shaft 30, thus the coil spring 24 will provide the hollow shaft 30 a recovery force when compressed toward the end face of the tubular receptacle 20, as shown in FIG. 4. It is also noted that when the invention is assembled, the through holes 35 does not communicate with the hole 43 communicating with the nozzle 23. Thus, the liquid received within the tubular with receptacle 20 does not flow out. However, pushing the button 60 will drive the hollow shaft 30 to move respect to the end face of the tubular receptacle 20 and compress the coil spring 24. Because the shaft 30 is configured to be hollow, therefore, pushing the shaft 30 is much easier than the conventional one. When the through holes 35 are aligned with the holes 43 of the hollow sleeve 40 and communicating therewith, the liquid received within the tubular receptacle 20 will then begin to flow out of the nozzle 23. When the hollow shaft 30 is driven to move toward the end face of the tubular receptacle 20, the liquid received within the tubular receptacle 20, due to the non-compressible characteristic of fluid, will therefore force the ball 15 to move away from the ball seat 16 to close the hole 14 of the tubular sleeve 13 and prevent the liquid received within the reservoir 10 from flowing out therefrom.

Referring to FIG. 5, another preferred embodiment of the invention is shown, wherein most parts of the structure are the same as the first embodiment and bear the same reference numeral. The only difference between the first embodiment and the second embodiment is that the first embodiment is provided with the seal 32 and the first O ring 36, however, in the second embodiment the seal 32 and the first O ring 36 are combined into a seal 37 configured to have a cone shape, which is able to accomplish the same effect as the seal 32 and the first O ring 36.

It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.