Abstract:
Switch of straight sprinkling gun, including an outer sleeve, a middle sleeve, a central tube, a detergent chamber, a main flow tube and a flow damper unit. The middle sleeve is fixedly disposed in the outer sleeve. The central tube is fitted in the middle sleeve. The outer and middle sleeves are synchronously rotatable about the central tube. The detergent chamber surrounds the main flow tube and communicates with one end of the outer sleeve. The flow damper unit includes a flow-guiding hole disposed on the detergent chamber and a communicating section disposed on the outer sleeve. The middle sleeve is formed with an outlet and a first inlet. The central tube is formed with a second inlet. A user can conveniently holds the outer sleeve to real-time adjust the water amount or conduct the detergent contained in the detergent chamber to discharge pure water or mixture of water and detergent.

Description:
BACKGROUND OF THE INVENTION 
     The present invention is related to a device for adjusting discharge manner and flow amount of a fluid, and more particularly to a switch of a straight sprinkling gun or a sprinkling gun provided with a brush at discharging end. 
     A conventional straight sprinkling gun substantially is composed of a tube body, a sprinkling head disposed at one end of the tube body and a switch valve disposed at the other end of the tube body. When a user uses the sprinkling gun to sprinkle, the user holds the straight sprinkling gun with both hands. When adjusting the water amount to reach a necessary sprinkling strength, the user must pause sprinkling and one hand of the user must leave the holding section and move to the switch valve for clockwise or counterclockwise rotating the same. Then, the hand is moved back to the holding section to proceed with the sprinkling. This is inconvenient to the user. 
     Furthermore, as shown in FIG. 8, during sprinkling, sometimes it is necessary to use a detergent such as a soap water to help in cleaning. Accordingly, the middle section of the tube body A is provided with a chamber B reciprocally surrounding the tube body A. A detergent adding hole C is formed on the chamber B and equipped with an openable cover. The tube body A is further formed with a communicating hole A 1 , whereby after the chamber B is moved, the chamber B is communicated with or not communicated with the tube body A. In use, the soap water is added from the detergent adding hole C into the chamber B and then the detergent adding hole C is closed. The switch valve is opened and the water flows through the tube body A and discharges from the sprinkling head. (At this time, the chamber B is not communicated with the tube body A.) When soap water is needed, the chamber B is moved to communicate with the tube body A, whereby the soap water is mixed with the clean water and conducted and discharged. 
     According to the above arrangement, the consumption of the soap water is determined by the amount of the water flow. In the case that it is not desired to consume soap water too fast, the user must pause sprinkling to adjust the switch valve and then proceed with the sprinkling. This is also quite inconvenient to the user. 
     In the above sprinkling gun structure, the soap water selection switch and the water amount controlling switch are separately disposed so that it is inconvenient for a user in adjustment. 
     SUMMARY OF THE INVENTION 
     It is therefore a primary object of the present invention to provide a switch of a straight sprinkling gun, in which the water amount is conveniently and real-time controlled without affecting sprinkling operation. 
     It is a further object of the present invention to provide the above switch of the straight sprinkling gun which has a design meeting human configuration for convenient operation. 
     It is still a further object of the present invention to provide the above switch of the straight sprinkling gun in which by one action, whether the soap water is conducted and discharged and the consumption speed of the soap water are real-time and conveniently controlled. A user can on one hand sprinkle and on the other hand conduct the soap water without affecting the sprinkling and cleaning operation. 
     According to the above objects, the switch of straight sprinkling gun of the present invention includes an outer sleeve, a middle sleeve, a central tube, a detergent chamber, a main flow tube and a flow damper unit. 
     The present invention can be best understood through the following description and accompanying drawings wherein: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective exploded view of a preferred embodiment of the present invention; 
     FIG. 2 is a side view of the preferred embodiment of the present invention; 
     FIG. 3 is a longitudinal sectional view of the preferred embodiment of the present invention; 
     FIG. 3A is an enlarged cross-sectional view of area A in FIG.  3 . 
     FIGS. 4A-4D are front, side, rear and longitudinal sectional views of the outer sleeve of the preferred embodiment of the present invention; 
     FIGS. 5A-5E are side, I—I sectional, II—II sectional, rear and longitudinal sectional views of the middle sleeve of the preferred embodiment of the present invention; 
     FIGS. 6A-6D are front, top, rear and longitudinal sectional views of the central tube of the preferred embodiment of the present invention; 
     FIGS. 7A-7B are front and side views of the first chamber of the preferred embodiment of the present invention; and 
     FIGS. 8,  8 A and  8 B are side and partially sectional views of a conventional straight sprinkling gun with mixable detergent. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Please refer to FIGS. 1 to  7 . The switch  1  of the straight sprinkling gun includes an outer sleeve  11 , a middle sleeve  12 , a central tube  13 , a detergent chamber  14 , a main flow tube  15  and a flow damper unit  16 . 
     The outer sleeve  11  has two open ends. One of the two ends is formed with a radial first flange  111  and a first outer wall  112  outward extending by a certain height. The inner side of the first flange  111  is formed with a first engaging section  111 ′ inward extending from the inner circumference thereof by a certain height. The inner wall of the outer sleeve  11  is formed with a projecting section  111 ″ extending by a certain length and height in a direction normal to the radius of the outer sleeve  11 . 
     The outer diameter of the middle sleeve  12  is smaller than the inner diameter of the outer sleeve  11 , while being larger than the inner diameter of the first flange  111 . The middle sleeve  12  has two open ends. One end of the middle sleeve  12  is formed with a second engaging section  12 ′ outward extending by a certain height corresponding to the first flange  111 . The outer wall of the second engaging section  12 ′ is formed with a dented section  12 ″ corresponding to the projecting section  111 ″. The second engaging section  12 ′ and the first engaging section  111 ′ are fitted and engaged with each other and the dented section  12 ″ and the projecting section  111 ″ are fitted and engaged with each other, whereby the middle sleeve  12  is fixedly disposed in the outer sleeve  11  and abuts against the first flange  111 . 
     The outer circumference of the other end of the middle sleeve  12  is formed with a middle wall  121  outward extending by a certain height and having an outer diameter corresponding to the inner diameter of the outer sleeve  11 . By means of the first flange  111  and the middle wall  121 , the outer side of the middle sleeve  12  is sealed in the outer sleeve  11  to form a water flow passage  113 . In addition, a predetermined portion of the inner wall of the middle sleeve  12  is formed with a radial first partitioning face  122 . 
     The side wall of the middle sleeve  12  between the first flange  111  and the first partitioning face  122  is formed with at least one outlet  123 . The side wall of the middle sleeve  12  opposite to the first partitioning face  122  and other than the side wall with the outlet  123  is formed with at least one first inlet  124 . In this embodiment, the outlet  123  and the first inlet  124  are a pair and 180 degrees opposite to each other. 
     The outer diameter of the central tube  13  corresponds to the inner diameter of the middle sleeve  12  and has a close end  131  and an open end  132 . The central tube  13  is disposed in the middle sleeve  12  with the close end  131  opposite to the first partitioning face  122 , whereby the middle sleeve  12  is rotatable about the central tube  13 . The side wall of the central tube  13  is formed with a second inlet  133  corresponding to the first inlet  124 . The outer side of the close end  131  of the central tube  13  is formed with a first connecting section  131 ′ having a certain length and passing through the first partitioning face  122 . The outer diameter of the first connecting section  131 ′ is smaller than the inner diameter of the middle sleeve  12 . The inner circumference of the first connecting section  131 ′ is polygonal. 
     The detergent chamber  14  includes a first and a second chambers  14 A,  14 B which are tube bodies with a predetermined length. One end of the first chamber  14 A is fitted with one end of the second chamber  14 B. 
     The other end of the first chamber  14 A has an outer diameter corresponding to the inner diameter of the first outer wall  112  and is rotatably fitted with the first outer wall  112  and is formed with a radial second flange  141 . The second flange  141  is formed with a second connecting section  141 ′ which is a column outward projecting by a certain length and having an outer circumference corresponding to the inner circumference of the first connecting section  131 ′. The second connecting section  141 ′ is fixedly fitted with the first connecting section  131 ′, whereby the outer sleeve  11  and the middle sleeve  12  are synchronously rotatable about the central tube  13  and the first chamber  14 A. 
     A predetermined portion of the inner wall of the second chamber  14 B is formed with a radial second partitioning face  142 . The circumference of the first chamber  14 A positioned between the second flange  141  and the second partitioning face  142  is formed with an incoming hole  143  provided with an openable cover (not shown). 
     The main flow tube  15  is composed of a tube body extending from the inner circumference of the second flange  141  into the detergent chamber  14  by a predetermined length and another tube body passing through the second partitioning face  142  with outer end exposed to the detergent chamber  14 . The two tube bodies are fitted with each other. Alternatively, the main flow tube  15  is formed by a tube body extending from the inner circumference of the second flange  141  into the detergent chamber  14  and passing through the second partitioning face  142  with outer end exposed to the detergent chamber  14 . The outer end of the main flow tube  15  is provided with a brush head or a sprinkling head (not shown) with variable sprinkling pattern. 
     The flow damper unit  16  includes a flow-guiding hole  161  and a communicating section  162 . 
     The flow-guiding hole  161  is formed by an opening projected from the first flange  111  to the second flange  141  corresponding to the second inlet  133 . The outer circumference of the flow-guiding hole  161  is formed with a wall body outward projecting by a predetermined height and abutting against the first flange  111 . 
     The communicating section  162  is a channel formed on the outer side of the first flange  111  corresponding to the first inlet  124 . The bottom face of the channel extends to the inner circumference of the first flange  111 . When rotating the outer sleeve  11  to align the communicating section  162  with the flow-guiding hole  161 , the flow-guiding hole  161  is not covered by the first flange  111  and the interior of the detergent chamber  14  communicates with the interior of the outer sleeve  11 . However, when the communicating section  162  is not aligned with the flow-guiding hole  161 , that is, the flow-guiding hole  161  is covered by the first flange  111 , the interior of the detergent chamber  14  does not communicate with the interior of the outer sleeve  11 . 
     According to the above arrangement, a detergent such as a soap water is added from the incoming hole  143  into the detergent chamber  14  and the incoming hole  143  is closed. Then, water flow is conducted into the open end  132  of the central tube  13 . The using state of the switch  1  of the straight sprinkling gun of the present invention is as follows: 
     A. The outer sleeve  11  is rotated. When any first inlet  124  is not aligned with the second inlet  133 , no water flow will flow out from the main flow tube  15   
     B. The outer sleeve  11  is rotated. When the communicating section  162  is not aligned with the flow-guiding hole  161 , that is, the first inlet  124  aligned with the communicating section  162  is not aligned with the second inlet  133 , while the other first inlet  124  is aligned with the second inlet  133 , the water passage is: the open end  132  of the central tube  13 →the second inlet  133 →the first inlet  124 →the water flow passage  113 →the outlet  123 →the second flange  141 →the main flow tube  15 →discharge pure water 
     C. The outer sleeve  11  is rotated. When the communicating section  162  is aligned with the flow-guiding hole  161 , that is, the first inlet  124  aligned with the communicating section  162  is aligned with the second inlet  133 , there are two water passages 
     I. The open end  132  of the central tube  13 →the second inlet  133 →the first inlet  124 →the water flow passage  113 →the outlet  123 →the main flow tube  15 →discharge pure water 
     II. The open end  132  of the central tube  13 →the second inlet  133 →the first inlet  124 →the water flow passage  113 →the outlet  123 →the flow-guiding hole  161 →the detergent chamber  14 →the flow-guiding hole  161 →the main flow tube  15 →discharge soap water 
     The switch  1  of the straight sprinkling gun of the present invention has the following advantages: 
     1. The water flow-controlling mechanism is circularly rotatable. The switch is positioned at the holding section of the hand so that a user can operate the switch without moving the palm. This meets human configuration. 
     2. The amount of the discharged water is real-time controlled. 
     3. The kind of discharged water is real-time selected. 
     4. When controlling the water amount or selecting the kind of the water, the sprinkling operation is not affected. 
     In another embodiment, a second outer wall  113  outward extends from the outer circumference of the other end of the outer sleeve  11 . The second outer wall  113  has an inner diameter larger than the inner diameter of the outer sleeve  11 . A connecting tube body  134  outward extends from the open end  132  of the central tube  13 . The connecting tube body  134  has an outer diameter smaller than the inner diameter of the second outer wall  113 . 
     The inner wall of the second outer wall  113  is formed with at least one first locating channel  113 ′. 
     The outer wall of the connecting tube body  134  is formed with a second locating channel  134 ′ corresponding to the first locating channel  113 ′ for receiving a locating pin and a spring, whereby when rotating the outer sleeve  11 , a locating effect is achieved and perceivable by a user. 
     The present invention can further have indications respectively disposed on the outer wall of the detergent chamber  14  and the outer wall of the first outer wall  112  of the outer sleeve  11  for indicating using state. 
     A cover body  144  is disposed at the other end of the second chamber  14 B for more sealing the detergent chamber  14 . The main flow tube  15  passes through the cover body  144 . 
     The first connecting section  131 ′ is locked with the second connecting section  141 ′ by a screw. 
     In order to achieve watertight effect, leakproof washers R 1 , R 2 , R 3 , R 4 , R 5 , R 6  are respectively disposed between the inner wall of the middle wall  121  and the outer wall of the central tube  13  and between the outer wall of the middle wall  121  and the inner wall of the outer sleeve  11  and around the outer circumference of the second inlet  133  and around the outer circumference of the flow-guiding hole  161  and between the outer wall of the detergent chamber  14  and the inner wall of the first outer wall  112  and between the second partitioning face  142  and the cover body  144 . 
     The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.