Patent Publication Number: US-2020290573-A1

Title: Spray Gun and Car Washer with Spray Gun

Description:
TECHNICAL FIELD 
     The disclosure relates to a field of vehicle maintenance, in particular to a spray gun and a car washer with the spray gun. 
     BACKGROUND 
     Inventors know that, a car washer is a machine using a computer to control a brush and high-pressure water to clean cars. The car washer is mainly composed of a control system, a circuit, an air passage, a water passage and a mechanical structure. The car washer has the characteristics of simple operation, elegant appearance, and small damage to car paint. In recent years, the car washer has been widely used in the automobile service industry. 
     With an improvement of international energy conservation and environmental protection mechanism and awareness, the way of using high-pressure water to wash car causes massive wastewater pollution and has other disadvantages; steam car washer just solves those problems, and steam car washer will become a new trend of development. 
     The main concept of steam car washer is that: first of all, the steam thoroughly cleans all parts of the car; and most importantly, steam car washer is not just a process of using high-pressure cold water to wash, but through the drying property of the steam, every small part of the car is thoroughly cleaned, sterilized, disinfected and deodorized at right pressure and temperature, so that a better car washing cleanliness is achieved. To improve simple cleaning to fine cleaning is closely related to a car owner&#39;s health. 
     However, the spray gun of the car washer in the art known to inventors does not ensure a sealing effect between a gas outlet pipe and a gas inlet pipe, and then the normal operation of the spray gun does not be ensured. 
     In addition, when a connecting rod and a handle of the spray gun of the car washer known to inventors are in a naturally stress-free state, the handle does not be locked effectively, and just pressing the handle will make the spray gun work, so if a person who is not familiar with the spray gun holds the spray gun, a misoperation will occur, which affects the safety of operators. Therefore, the safety performance of the spray gun known to inventors is low, and it is easy to cause danger. 
     SUMMARY 
     Some embodiments of the disclosure provide a spray gun and a car washer with the spray gun, solve a problem of low safety performance of the spray gun known to inventors. 
     An embodiment of the present disclosure provides a spray gun, which includes a spray gun housing and an operating handle. The operating handle is provided on the spray gun housing to control connection and disconnection of a fluid in the spray gun by pulling the operating handle. The spray gun further includes: a spray gun main body; a sealing assembly, at least a part of the sealing assembly being movably provided in the spray gun main body of the spray gun to control the connection and disconnection of a fluid in the spray gun main body, and the operating handle being connected with the sealing assembly, so as to drive the sealing assembly to move by pulling the operating handle, so that the connection and disconnection of the fluid in the spray gun main body is controlled; and a locking switch, mounted on the spray gun housing in a position-adjustable manner, the locking switch being located on one side of the operating handle and cooperating with the operating handle in a limiting manner, so as to prevent the operating handle from being pulled when the spray gun is in a non-operating state. The sealing assembly includes a partition flange used for cutting off a fluid passage in the spray gun main body and an elastic member connected with the partition flange; and the elastic member is provided in a retractable way to press the partition flange to a position for that cuts off the fluid passage of the spray gun main body. 
     In an exemplary embodiment, the spray gun further includes: a connecting rod. One end of the connecting rod is connected with the sealing assembly, and the other end of the connecting rod is connected with the operating handle, so that the operating handle drives, through the connecting rod, the sealing assembly to move. 
     In an exemplary embodiment, the locking switch is provided with a locking portion. The locking switch is movably provided along a direction close to or away from the operating handle, so that the locking portion is abutted against the operating handle, or the locking portion avoids the operating handle to make the operating handle move. 
     In an exemplary embodiment, the locking switch is provided with a locking position used for limiting the operating handle and an avoiding position used for avoiding the operating handle. The locking switch is movably provided between the locking position and the avoiding position. The spray gun further includes a cushion block. The cushion block is mounted on the spray gun housing. When the locking switching is located at the locking position, the cushion block is located on a side, far away from the operating handle, of the locking portion and is abutted against the locking portion, so as to lock the locking switch at the locking position. 
     In an exemplary embodiment, the spray gun further includes a gas inlet pipe and a gas outlet pipe. Both the gas inlet pipe and the gas outlet pipe are mounted on the spray gun main body. A gas inlet passage used for being in communication with a pipe cavity of the gas inlet pipe and a gas outlet passage used for being in communication with a pipe cavity of the gas outlet pipe are provided on the spray gun main body. At least a part of the sealing assembly is movably provided between the gas inlet passage and the gas outlet passage, so as to cut off the gas inlet passage and the gas outlet passage, or communicate the gas inlet passage and the gas outlet passage. 
     In an exemplary embodiment, a partition passage is provided on the spray gun main body. The partition passage is located between the gas inlet passage and the gas outlet passage. The partition passage is in communication with both the gas inlet passage and the gas outlet passage. The partition flange is provided in the partition passage in a position-adjustable manner, so as to cut off the gas inlet passage and the gas outlet passage. 
     In an exemplary embodiment, the partition passage is a stepped hole including a first hole section and a second hole section. The first hole section is in communication with the gas outlet passage, the second hole section is in communication with the gas inlet passage, and the partition passage is occluded at a joint between the first hole section and the second hole section. 
     In an exemplary embodiment, the sealing assembly further includes a sealing base. One end of the elastic member is abutted against the sealing base, and the other end of the elastic member is abutted against the partition flange. 
     In an exemplary embodiment, the spray gun further includes an ejector pin. The ejector pin is connected with the partition flange, so that the partition flange is pushed to move through the ejector pin. 
     Another embodiment of the present disclosure provides a car washer, which includes a steam generator and the spray gun abovementioned, wherein the spray gun is connected with the steam generator. 
     The spray gun in some embodiments of the disclosure includes the spray gun housing, the operating handle, and the locking switch. The operating handle is provided on the spray gun housing to control the connection and disconnection of the fluid of the spray gun by pulling the operating handle. The locking switch is mounted on the spray gun housing in a position-adjustable manner, and the locking switch is located on one side of the operating handle and cooperated with the operating handle in a limiting manner. In this way, when the spray gun is in the non-operating state, the operating handle is prevented from being pulled, to prevent a user from pulling the operating handle due to a misoperation, thereby preventing the damage of the spray gun to the user, and solving the problem of low safety performance of the spray gun known to inventors. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings constituting a part of the application are used for providing further understanding of the disclosure. Schematic embodiments of the disclosure and description thereof are used for illustrating the disclosure and not intended to form an improper limit to the disclosure. In the accompanying drawings: 
         FIG. 1  illustrates a structure diagram of an embodiment of a spray gun according to the disclosure; 
         FIG. 2  illustrates a front view of the embodiment of the spray gun in  FIG. 1 ; and 
         FIG. 3  illustrates an assembly drawing of a sealing assembly and a spray gun main body of the spray gun in  FIG. 1 . 
     
    
    
     The above accompanying drawings include the following reference numbers: 
       10 . spray gun housing;  20 . operating handle;  30 . locking switch;  31 . locking portion;  311 . pressing part;  40 . spray gun main body;  50 . sealing assembly;  51 . ejector rod;  60 . connecting rod;  70 . cushion block; 
       110 . gas inlet pipe;  120 . gas outlet pipe;  41 . gas inlet passage;  42 . gas outlet passage;  43 . partition passage;  431 . first hole section;  432 . second hole section;  140 . sealing ejector block;  141 . partition flange;  150 . elastic member;  160 . sealing base;  170 . first sealing ring;  180 . ejector pin;  190 . mounting base;  191 . second sealing ring;  192 . pressing block;  193 . ejector block. 
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     It is to be noted that the embodiments in the application and the characteristics in the embodiments are combined under the condition of no conflicts. The disclosure is elaborated below with reference to the accompanying drawings and embodiments. 
     The disclosure provides a spray gun housing, which includes a spray gun housing  10  and an operating handle  20 . Referring to  FIG. 1  to  FIG. 3 , the operating handle  20  is provided on the spray gun housing  10  to control connection and disconnection of a fluid of the spray gun by pulling the operating handle  20 . The spray gun further includes: a locking switch  30 . The locking switch  30  is mounted on the spray gun housing  10  in a position-adjustable manner, and the locking switch  30  is located on one side of the operating handle  20  and cooperates with the operating handle  20  in a limiting manner, so as to prevent the operating handle  20  from being pulled when the spray gun is in a non-operating state. 
     The spray gun in the disclosure includes the spray gun housing  10 , the operating handle  20 , and the locking switch  30 . The operating handle  20  is provided on the spray gun housing  10  to control the connection and disconnection of the fluid of the spray gun by pulling the operating handle  20 . The locking switch  30  is mounted on the spray gun housing  10  in a position-adjustable manner, and the locking switch  30  is located on one side of the operating handle  20  and cooperates with the operating handle  20  in a limiting manner. In this way, when the spray gun is in the non-operating state, the operating handle  20  is prevented from being pulled, to prevent a user from pulling the operating handle  20  due to a misoperation, thereby preventing a damage of the spray gun to the user, and solving a problem of low safety performance of the spray gun known to inventors. 
     The spray gun in the disclosure includes a gas inlet pipe  110  and a gas outlet pipe  120 . Referring to  FIG. 3 , the spray gun further includes: a spray gun main body  40 , both the gas inlet pipe  110  and the gas outlet pipe  120  being mounted on the spray gun main body  40 , and a gas inlet passage  41  used for being in communicating with a pipe cavity of the gas inlet pipe  110  and a gas outlet passage  42  used for communicating with a pipe cavity of the gas outlet pipe  120  being provided on the spray gun main body  40 ; and a sealing assembly, at least a part of the sealing assembly being movably provided between the gas inlet passage  41  and the gas outlet passage  42 , so as to cut off the gas inlet passage  41  and the gas outlet passage  42  or communicate the gas inlet passage  41  with the gas outlet passage  42 . The sealing assembly includes a partition flange  141  used for cutting off the gas inlet passage  41  and the gas outlet passage  42  and an elastic member  150  connected with the partition flange  141 . The elastic member  150  is provided in a retractable way to press the partition flange  141  to a position that cutting off the gas inlet passage  41  and the gas outlet passage  42 . 
     The spray gun in the disclosure includes the gas inlet pipe  110 , the gas outlet pipe  120 , and the spray gun main body  40 . Both the gas inlet pipe  110  and the gas outlet pipe  120  are mounted on the spray gun main body  40 . The gas inlet passage  41  used for being in communication with the pipe cavity of the gas inlet pipe  110  and the gas outlet passage  42  used for being in communication with the pipe cavity of the gas outlet pipe  120  are provided on the spray gun main body  40 . The spray gun further includes the sealing assembly. At least a part of the sealing assembly is movably provided between the gas inlet passage  41  and the gas outlet passage  42 , so as to cut off the gas inlet passage and the gas outlet passage, or communicate the gas inlet passage and the gas outlet passage. To communicate or uncommunicate the gas inlet passage  41  and the gas outlet passage  42  fluidly, the sealing assembly includes the partition flange  141  for cutting off the gas inlet passage  41  and the gas outlet passage  42  and the elastic member  150  connected with the partition flange  141 . By providing the elastic member  150  in a retractable way, the partition flange  141  is pressed, under the action of the elastic member  150 , at a position that cuts off the gas inlet passage  41  and the gas outlet passage  42 , thereby the gas inlet passage  41  and the gas outlet passage  42  are not communicated fluidly; and only when acted upon by an external force, the partition flange  141  overcomes the action of the elastic member  150  to communicate the gas inlet passage  41  and the gas outlet passage  42 ; in this way, the sealing effect of the spray gun main body  40  is enhanced, and the problem that the sealing effect between the gas outlet pipe and the gas inlet pipe of the spray gun of the car washer known to inventors cannot be ensured is solved. 
     The main structure of the spray gun in the present embodiment is as follows. As shown in  FIG. 1  and  FIG. 2 , the spray gun further includes: the spray gun main body  40 , the spray gun main body  40  being provided in the spray gun housing  10 ; and the sealing assembly  50 , at least a part of the sealing assembly  50  is movably provided in the spray gun main body  40 , to control the connection and disconnection of the fluid in the spray gun main body  40 . The operating handle  20  is connected with the sealing assembly  50  to drive the sealing assembly  50  to move by pulling the operating handle  20 , so as to control the connection and disconnection of the fluid in the spray gun main body  40 . 
     It can be seen that the connection and disconnection of the fluid in the spray gun main body  40  is controlled conveniently by pulling the operating handle  20 , and then the opening or closing of the spray gun is controlled conveniently. 
     To implement the connection between the operating handle  20  and the sealing assembly  50 , as shown in  FIG. 1  and  FIG. 2 , the spray gun further includes: a connecting rod  60 . One end of the connecting rod  60  is connected with the sealing assembly  50 , and the other end of the connecting rod  60  is connected to the operating handle  20 , so that the operating handle  20  drives, through the connecting rod  60 , the sealing assembly  50  to move. 
     The specific form of the sealing assembly  50  in the present embodiment is as follows: the sealing assembly  50  includes an ejector rod  51  and a sealing part connected with the ejector rod  51 ; the sealing part is provided in the fluid passage of the spray gun main body  40  to control the connection and disconnection of the fluid passage; and the connecting rod  60  is connected with the ejector rod  51  to drive the ejector rod  51  to move. In this way, by making the ejector rod  51  to move, the connection and disconnection of the fluid in the spray gun main body  40  is controlled conveniently. 
     In the present embodiment, the locking switch  30  is at a side, far away from the sealing assembly  50 , of the operating handle  20 . In this way, the operating handle  20  is locked conveniently, to prevent the operating handle  20  from moving when the spray gun is in the non-operating state. 
     To lock the operating handle  20 , as shown in  FIG. 1  and  FIG. 2 , the locking switch  30  has a locking portion  31 ; the locking switch  30  is movably provided along a direction close to or away from the operating handle  20 , so that the locking portion  31  is abutted against the operating handle  20 , or the locking portion  31  avoids the operating handle  20  to make the operating handle  20  move. 
     In an exemplary embodiment, the locking switch  30  has a locking position used for limiting the operating handle  20  and an avoiding position used for avoiding the operating handle  20 . The locking switch  30  is movably provided between the locking position and the avoiding position. The spray gun further includes a cushion block  70 . The cushion block  70  is mounted on the spray gun housing  10 . When the locking switching  30  is located at the locking position, the cushion block  70  is located on a side, far away from the operating handle  20 , of the locking portion  31  and is abutted against the locking portion  31 , so as to lock the locking switch  30  at the locking position. 
     To limit the locking switch  30 , as shown in  FIG. 1  and  FIG. 2 , the cushion block  70  is located between a locking position and an avoiding position of the locking switch  30 . The cushion block  70  is an elastic member, so that the locking switch  30  compresses the cushion block  70  to pass through the cushion block  70  when moving between the locking position and the avoiding position of the locking switch  30 . 
     In some embodiments, the cushion block  70  is a rubber block. 
     To compress the cushion block  70  to move to the avoiding position after passing through the cushion block  70 , a pressing part  311  is provided on the locking portion  31 . When the locking switch  30  is located at the locking position, the pressing part  311  is pressed on the cushion block  70 ; when the locking switch  30  moves towards the avoiding position, the pressing part  311  compresses the cushion block  70  so as to make it shrink. 
     In an exemplary embodiment, an operating head is provided on the locking switch  30 . 
     The main structure of the spray gun main body  40  is as follows. 
     To communicate or uncommunicate the gas inlet passage  41  and the gas outlet passage  42 , as shown in  FIG. 3 , a partition passage  43  is provided on the spray gun main body  40 . The partition passage  43  is located between the gas inlet passage  41  and the gas outlet passage  42 . The partition passage  43  is in communication with both the gas inlet passage  41  and the gas outlet passage  42 . The partition flange  141  is provided in the partition passage  43  in a position-adjustable manner, so as to uncommunicate the gas inlet passage  41  and the gas outlet passage  42 . 
     As shown in  FIG. 3 , the specific structure of the partition passage  43  in the disclosure is that: the partition passage  43  is a stepped hole including a first hole section  431  and a second hole section  432 ; the first hole section  431  is in communication with the gas outlet passage  42 ; the second hole section  432  is in communication with the gas inlet passage  41 ; and the partition passage  43  is occluded at a joint between the first hole section  431  and the second hole section  432 . 
     To fix the whole sealing assembly, the sealing assembly further includes a sealing base  160 . One end of the elastic member  150  is abutted against the sealing base  160 , and the other end of the elastic member  150  is abutted against the partition flange  141 . 
     In some embodiments, the sealing base  160  is a sealing nut. 
     To facilitate the sealing of the partition passage, as shown in  FIG. 3 , the sealing assembly further includes a sealing ejector block  140 . The partition flange  141  is provided on the sealing ejector block  140 , and the elastic member  150  is provided on the sealing ejector block  140  in a sleeving manner. 
     In an exemplary embodiment, the elastic member  150  is a spring. The sealing ejector block  140  has a rod body portion, and the spring is provided on the rod body portion in a sleeving manner. 
     In some embodiments, the sealing assembly further includes a first sealing ring  170 . The first sealing ring  170  is mounted on the partition flange  141 , so as to enhance a partition effect between the gas outlet passage  42  and the gas inlet passage  41 . By setting the first sealing ring  170 , the sealing effect of the sealing assembly is enhanced, thereby ensuring the partition effect between the gas outlet passage  42  and the gas inlet passage  41 . 
     To push the partition flange  141  to connect the gas outlet passage  42  and the gas inlet passage  41 , as shown in  FIG. 3 , the spray gun further includes an ejector pin  180 . The ejector pin  180  is connected to the partition flange  141 , so that the partition flange  141  is pushed by the ejector pin  180  to move. 
     To locate the ejector pin  180 , as shown in  FIG. 3 , the spray gun further includes a mounting base  190 . The mounting base  190  is provided on the ejector pin  180  in a sleeving manner and connected with the spray gun main body  40 , so that the ejector pin  180  is mounted on the spray gun main body  40  through the mounting base  190 . 
     In an exemplary embodiment, the ejector pin  180  is in threaded connection with the mounting base  190  to make the ejector pin  180  stretch and retract toward the partition flange  141  by rotation, so as to drive the partition flange  141  to stretch and retract to communicate the gas outlet passage  42  and the gas inlet passage  41 . 
     To achieve the sealing effect between the spray gun main body  40  and the mounting base  190  and the ejector pin  180 , as shown in  FIG. 3 , a mounting chamber is provided on the mount base  190 , a second sealing ring  191  is provided in the mounting chamber, and the mounting base  190  is in sealed connection with the spray gun main body  40  through the second sealing ring  191 . 
     In some embodiments, the spray gun further includes a pressing block  192 . The pressing block  192  is provided in the mounting chamber and pressed on the second sealing ring  191 . In this way, the sealing effect is enhanced. 
     In some embodiments, an ejector block  193  is provided on one end, far away from the partition flange  141 , of the ejector pin  180 . By setting the ejector block  193 , the ejector pin  180  is operated conveniently. 
     Some embodiments of the disclosure also provide a car washer, which includes a steam generator and the spray gun abovementioned, wherein the spray gun is connected with the steam generator. 
     It can be seen from above description that the above embodiments of the disclosure achieve the following technical effects. 
     The spray gun in some embodiments of the disclosure includes the gas inlet pipe  110 , the gas outlet pipe  120 , and the spray gun main body  40 . Both the gas inlet pipe  110  and the gas outlet pipe  120  are mounted on the spray gun main body  40 . The gas inlet passage  41  used for being in communication with the pipe cavity of the gas inlet pipe  110  and the gas outlet passage  42  used for being in communication with the pipe cavity of the gas outlet pipe  120  are provided on the spray gun main body  40 . The spray gun further includes the sealing assembly. At least a part of the sealing assembly is movably provided between the gas inlet passage  41  and the gas outlet passage  42 , so as to cut off the gas inlet passage  41  and the gas outlet passage  42 , or communicate the gas inlet passage  41  and the gas outlet passage  42 . To communicate or uncommunicate the gas inlet passage  41  and the gas outlet passage  42 , the sealing assembly includes the partition flange  141  for cutting off the gas inlet passage  41  and the gas outlet passage  42  and the elastic member  150  connected with the partition flange  141 . By providing the elastic member  150  in a retractable way, the partition flange  141  is pressed, under the action of the elastic member  150 , at the position that cuts off the gas inlet passage  41  and the gas outlet passage  42 , thereby cutting off the gas inlet passage  41  and the gas outlet passage  42 ; and only when acted upon by an external force, the partition flange  141  overcomes the action of the elastic member  150  to turn on the gas inlet passage  41  and the gas outlet passage  42 ; in this way, the sealing effect of the spray gun main body  40  is enhanced, and the problem that the sealing effect between the gas outlet pipe and the gas inlet pipe of the spray gun of the car washer known to inventors cannot be ensured is solved. 
     The above is only some embodiments of the disclosure and not intended to limit the disclosure; for those skilled in the art, the disclosure has various modifications and changes. Any modifications, equivalent replacements, improvements and the like within the spirit and principle of the disclosure should fall within the protection scope of the claims of the disclosure.