Patent Publication Number: US-2017348724-A1

Title: Caulking gun

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a caulking gun. 
     Description of the Prior Art 
     Usually, a caulking gun is for caulking gaps at the corner or connection of two objects, and it is quick and convenient to use the caulking gun. 
     However, there is non-actuating action in the conventional caulking gun. When a user presses a pressing shank, a driving member cannot be driven immediately to actuate the pushing rod to move forward to abut against a sealant cartridge, so it is inefficient. In addition, an elastic member which is for abutting a limitation member is arranged on an outer side of a gun body or sleeved on a pushing rod, when the elastic member is arranged on the outer side of the gun body, the elastic member may be easily damaged or fallen off; when the elastic member is sleeved on the pushing rod, the elastic member abrades with the pushing rod easily and produces noises; therefore, an additional space is required for the elastic member to be arranged therein. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The major object of the present invention is to provide a caulking gun, which has a simple and stable structure without non-actuating action. 
     To achieve the above and other objects, a caulking gun is provided, including: a gun body, including a side wall and for a sealant cartridge to be assembled thereto; a limitation member, swingably assembled to the gun body; a pushing rod, movably assembled to the gun body and disposed through the limitation member and the side wall, the pushing rod optionally frictionally gripped by the limitation member for pushing the sealant cartridge; a driving member, movably disposed within the gun body, the driving member and the limitation member being located by two opposite sides of the side wall, the driving member capable of driving the pushing rod; an abutting mechanism, movably disposed through the side wall and radially disengageable directly from the pushing rod, two ends of the abutting mechanism respectively abutting against the driving member and the limitation member, the abutting mechanism including an abutting portion and an elastic member, the elastic member being arranged between the abutting portion and the driving member. 
     The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a stereogram of a preferred embodiment of the present invention; 
         FIG. 2  is a breakdown view of the preferred embodiment of the present invention; 
         FIG. 3  is a drawing of the preferred embodiment of the present invention in application; 
         FIGS. 4 to 6  are drawings showing the preferred embodiment of the present invention in operation; 
         FIG. 7  is a stereogram of another preferred embodiment of the present invention; and 
         FIG. 8  is a partially-enlarged view of  FIG. 7 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
     Please refer to  FIGS. 1 to 6  for a preferred embodiment of the present invention. A caulking gun  1  includes a gun body  2 , a limitation member  3 , a pushing rod  4 , a driving member  5  and an abutting mechanism  6 . 
     The gun body  2  includes a lateral wall  21  and for a sealant cartridge  10  to be assembled thereto. The limitation member  3  is swingably assembled to the gun body  2 , and when the limitation member  3  moves away from the side wall  21 , the limitation member  3  restrict the pushing rod  4  to move away from the gun body  2 . The pushing rod  4  is movably assembled to the gun body  2  and disposed through the limitation member  3  and the side wall  21 , and the pushing rod  4  is optionally frictionally gripped by the limitation member  3  for pushing the sealant cartridge  10 . The driving member  5  is movably disposed within the gun body  2 , the driving member  5  and the limitation member  3  are located by two opposite sides of the side wall  21 , the driving member  5  is capable of driving the pushing rod  4 . The abutting mechanism  6  is movably disposed through the side wall  21  and radially disengageable directly from the pushing rod  4 , two ends of the abutting mechanism  6  respectively abut against the driving member  5  and the limitation member  3 , the abutting mechanism  6  includes an abutting portion  60  and an elastic member  67 , the elastic member  67  is arranged between the abutting portion  60  and the driving member  5 , and the elastic member  67  allows the abutting portion  60  to normally abut against and push the limitation member  3  to keep the limitation member  3  remote from the gun body  2 . It is to be noted that the pushing rod  4  is not blocked by the abutting mechanism  6  on at least one radial direction and can move away from the pushing rod  4 , and of course, when the abutting mechanism  6  and the pushing rod  4  are arranged in the caulking gun  1 , both of the abutting mechanism  6  and the pushing rod  4  are positioned and unable to be separated radially. 
     In this embodiment, the abutting portion  60  includes a block body  61  and two pillar bodies  66  which project from the block body  61 , the two pillar bodies  66  are movably disposed through the side wall  21 , and the block body  61  and the two pillar bodies  66  respectively abut against the driving member  5  and the limitation member  3 . The caulking body  1  further includes a pressing shank  7  which is pivoted to the gun body  2  and a linkage mechanism  8 , the linkage mechanism  8  includes a first linkage  81  which is pivoted to the side wall  21  and a second linkage  82  which is pivoted to the first linkage  81 , the second linkage  82  and the block body  61  are located by two sides of the pushing rod  4  and abut against the driving member  5 , a place of the first linkage  81  and the second linkage  82  pivoted to each other further has a rotatable member  83 , and the pressing shank  7  abuts against the rotatable member  83 . The side wall  21  has two opening slots  22 , and the two pillar bodies  66  are disposed through the two opening slots  22 . 
     The limitation member  3  swings on a phantom plane  9  (a parallel paper plane in  FIG. 5 ), the phantom plane  9  is parallel to a moving direction of the pushing rod  4  and also parallel to a radial direction of the rotatable member  83 , and the two pillar bodies  66  are located by two sides of the phantom plane  9  and abut against the limitation member  3  simultaneously so that the limitation member  3  can moves stably. The block body  61  has a receiving groove  62  (as long as at least one of the driving member  5  and the block body  61  has the receiving groove), and the elastic member  67  is received in the receiving groove  62  so that the gun body  2  does not need to provide additional space for the elastic member  67  to be received therein. The block body  61  has a guiding groove  63 , the guiding groove  63  is radially saddled above the pushing rod  64 , and the guiding groove  63  can make the block body  61  positioned above the pushing rod and undetachable. 
     The pushing rod  4  is disposed through the driving member  5 , a recovery elastic member  23  is further arranged between the driving member  5  and the gun body  2 , and the recovery elastic member  23  enables the driving member  5  have a tendency to move toward the block body  61  normally; therefore, the driving member  5  is abutted and pushed by the recovery elastic member  23  and positioningly abutted by the linkage mechanism  8  to tilt normally, a part of the driving member  5  which is located above the pushing rod  4  tilts toward the side wall  21 , and rest part of the driving member  5  which is located below the pushing rod  4  tilts toward the recovery elastic member  23  so that the driving member  5  normally abuts against the pushing rod  4  to ensure there is no non-actuating action in the caulking gun  1 . 
     The first linkage  81  and the second linkage  82  form a V shape with an opening toward the pushing rod  4  so that the linkage mechanism  8  has a retractable space to abut against and push the driving member  5  or make the driving member  5  back to an initial position. The block body  61  and the two pillar bodies  66  are located by a same side of the pushing rod  4 . The block body  61  includes a pushing head  64  which abuts against the driving member  5  and a connecting portion  65  which is thinner than the pushing head  64 , and the two pillar bodies  66  are detachably inserted in the connecting portion  65  to strengthen a structural stability and for the convenience of replacing the block body  61  or the two pillar bodies  66 . 
     The pressing shank  7  has a swinging member  71  which is pivotally arranged thereto, the swinging member  71  has a curved abutting face  72 , the curved abutting face  72  abuts against the rotatable member  83 , the curved abutting face  72  can decrease a friction between the pressing shank  7  and the linkage mechanism  8 , the second linkage  82  is pinned with a pushing block  84 , and the pushing block  84  abuts against the driving member  5  so as to decrease a friction between the driving member  5  and the linkage mechanism  8 . 
     Please refer to  FIGS. 4 to 6 . When the limitation member  3  is pressed to actuate the abutting mechanism  6  to abut against and push the driving member  5 , the driving member  5  is perpendicular to the pushing rod  4  and releases a restriction toward the pushing rod  4  to make the pushing rod  4  move away from the gun body  2 . When the limitation member  3  is not pressed, the elastic member  67  drives the abutting portion  60  to abut against and push the limitation member  3  to make the limitation member  3  move away from the gun body  2 , and after the gun body  2  is assembled to the sealant cartridge  10 , the user can press the pressing shank  7  to make the linkage mechanism  8  to extend and push the driving member  5 , and the driving member  5  drives the pushing rod  4  to push the sealant cartridge  10 . 
     Please refer to  FIGS. 7 and 8  for another embodiment. A side wall  21   a  of a gun body  2   a  may also has two through holes  22   a,  and two pillar bodies  66   a  are disposed through the two through holes  22   a  to stably guide and position the two pillar bodies  66   a.    
     In other embodiments, the caulking gun may not have the pressing shank and/or the linkage mechanism and may instead drive the pushing rod electrically via a driving sheet; or the pressing shank directly abuts against the driving sheet, and the caulking gun may not have the linkage mechanism; according to different requirements, the two pillar bodies of the abutting mechanism may abut against the limitation member non-simultaneously, and the two pillar bodies may not be positioned by the two sides of the phantom plane; the driving member and the receiving groove of the caulking gun may both have a receiving groove, and two ends of the elastic member are respectively received in the two receiving grooves; the block body of the abutting mechanism may surround the pushing rod, and the block body and the two pillar bodies may not be positioned by the same side of the pushing rod; the elastic member of the abutting mechanism may be arranged between the block body and the side wall and make the block body move toward the limitation member normally; the driving member of the caulking gun may fixedly clamp the pushing rod in a non-circular mode, for example but not limited thereto, U-shaped; the driving member of the caulking gun may tilt normally toward other directions as long as the driving member abrades and actuates the pushing rod normally. 
     Give the above, the caulking gun does not have any non-actuating action, the guiding groove between the two pillar bodies and the block body can strengthen the balance and stability of the abutting structure, and the elastic member is received in the receiving groove of the block body to protect and streamline the structure and eliminate friction. 
     While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.