Abstract:
Device for locking the articulated joint in the longitudinal direction between the plate of a dust mop and the handle, which permits deactivation and subsequent reactivation of the locking of the articulated joint between the handle and the plate in a longitudinal direction, carried out by the user with his feet instead of his hands.

Description:
CROSS-REFERENCES 
       [0001]    None. 
       FIELD OF THE INVENTION 
       [0002]    The subject matter of this patent is a device for locking the articulated joint in the longitudinal direction between the plate of a dust mop and the handle. 
       BACKGROUND OF THE INVENTION 
       [0003]    As is well-know the plates for dust mops are connected to their relative handle with the usual attachments that allow the handle to be articulated with respect to the plane of the plate both in the transversal as well as in the longitudinal direction. 
         [0004]    Sometimes, for some cleaning operations, it is necessary to make it solid and prevent any swinging between the plate and the handle in the longitudinal direction of the plane of the handle, by locking the relative articulated joint. 
         [0005]    On the market the devices that carry this out are extremely complex and therefore costly. 
         [0006]    For the deactivation and subsequent activation operation, for said devices on the market you have to use your hands, something that is extremely inconvenient for the user. 
         [0007]    The purpose of this patent is to make a simple, and therefore cheap, device which permits deactivation and subsequent reactivation of the locking of the articulated joint between the handle and the plate in a longitudinal direction, carried out by the user with his feet instead of his hands. 
         [0008]    The base element, with an open female type connection on the bridge-shaped pivot with an elliptical section and joined to the plate, which creates the articulated joint in the transversal direction with respect to plane of the plate, has above the hinge zone, in order to carry out the articulated joint in the longitudinal direction of the plate, an extension configured as a female with central hollow. 
         [0009]    The handle-holder element fitted with threading for the flange (not drawn), in addition to the lower hinge zone for coupling with the base element for creating the articulated movement in the longitudinal direction of the plate, has a fork configuration for the entire zone above up to where the chamber for inserting the handle ends. 
         [0010]    The arms of the fork, for the section relative to the extension above the hinge zone, have some raised areas on the internal walls functioning as a guide for a sled element to be inserted inside. 
         [0011]    On the four lower walls of the arms there are two arrays of conchoidal imprints joined to the planes of the above-mentioned walls, and which are used by the sled element for coupling the raised areas with which it is equipped, for remaining in a stopped position during the execution of two different operating actions (locking and unlocking). 
         [0012]    The sled element, whose section is configured in a complementary way to the transversal section of the stroke of the fork along which it has to travel going up and going down, has a male appendage on its lower surface whose size corresponds to the female hollow on the upper extension of the base element into which it has to go to lock the articulated joint. 
         [0013]    Said sled element has two sturdy cantilever extensions in the centre of the sides, in the form of arms, to be maneuvered with the foot of the operator who uses the dust mop for cleaning, fitted with device of which the sled element is a part. 
         [0014]    What has been described is clarified in the enclosed drawings. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0015]      FIG. 1  is a common type of mop plate fitted with a base element with the lower female part that, when coupled by means of hinging with the bridge-shaped crosspiece joined to the upper surface of the plate, allows the articulated joint to move in the direction transversal to the surface of the plate; it is fitted with a handle-holding element, which when hinged with its female lower end to the upper male element of the base, provides articulated movement in the longitudinal direction with respect to the plane of the plate. 
           [0016]      FIG. 2  shows a front view of the base element with the lower part for the articulated connection with the plate for a cleaning mop and with the central part for the articulated connection with the handle-carrying element and with the upper part composed of an extension configured like a fork, whose hollow has the function of acting as a female connection. 
           [0017]      FIG. 3  shows the element of  FIG. 2  seen from the side. 
           [0018]      FIG. 4  shows the element of  FIG. 2  seen from above. 
           [0019]      FIG. 5  is the axonometric view of the element of  FIG. 2 . 
           [0020]      FIG. 6  is the midpoint section relative to  FIG. 2  according to the height. 
           [0021]      FIG. 7  is the midpoint section relative to  FIG. 2  according to the width. 
           [0022]      FIG. 8  shows the handle-carrying element seen from the front, evidencing the fork-shaped part whose arms in the end tract are fitted with housings for the hinge pin for the articulation with the base element and in the remaining adjacent tract the internal walls have raised areas and on the side surfaces there are two arrays of conchoidal imprints; the raised areas making up the guides for the up and down course of a sled element that is installed joined to the inside of the fork and making up the two arrays of conchoidal imprints, the housings in which special protrusions engage on the wing-like extensions, with which the sled is equipped for being positioned in a stop position to the end of the upper course and to the end of the lower course. 
           [0023]      FIG. 9  is the side view of the element represented in  FIG. 8 . 
           [0024]      FIG. 10  shows the longitudinal section of the element represented in  FIG. 8  according to the midpoint plane passing into the chamber between the two arms of the fork. 
           [0025]      FIG. 11  shows the longitudinal section of the element represented in  FIG. 8  according to the midpoint plane rotated 90 degrees with respect to the plane of the section relative to  FIG. 10 . 
           [0026]      FIG. 12  shows the transversal section of the element represented in  FIG. 8  according to a passing plane in line with the tract marked by the two orders of conchoidal imprints on the side surfaces of the arms of the fork. 
           [0027]      FIG. 13  is the axonometric view taken from above of the element represented in  FIG. 7 . 
           [0028]      FIG. 14  shows the sliding element seen from the front which is mounted inside the fork of the element represented in  FIG. 7 . We can see the raised part below the central zone dimensionally configured to engage as a male connector into the concavity of the fork in the upper part of the base element represented in  FIG. 2 . We can see the two wing expansions on the sides, fitted centrally with protrusions and we can see the two cantilever extensions with a horizontal disposition that come out in the middle area of the sides for activating the above-mentioned sled up and down, using the cleaning operator&#39;s feet. 
           [0029]      FIG. 15  is the side view of the element represented in  FIG. 14 . 
           [0030]      FIG. 16  is the view from above of the element represented in  FIG. 14 . 
           [0031]      FIG. 17  is the section of the element of  FIG. 14  according to a vertical plane passing through D-D. 
           [0032]      FIG. 18  is the axonometric view of the sled element represented in  FIG. 14 . 
           [0033]      FIG. 19  is the outer frontal view of the three elements united with each other, each configured to create the device that is the object of the patent and precisely the base element with the lower part of attaching to the dusting mop plate making the transversal articulation, with the central part for the articulated connection with the handle-holder element and with the upper part composed of a fork-shaped extension, whose cavity has the function of a female connector and with the upper fork-shaped female part with a central female cavity. The handle-holding element with the fork-shaped configuration with guides on the inner surface of the arms and with conchoidal imprints on the side walls of the arms, coupled with the attachment element to the plate, realising with this latter the longitudinal articulation between the handle and the plate; the sled element inserted into the fork of the handle-holder element. According to what can be seen in the diagram, the sled element that is an engaged position with its protrusions in the conchoidal imprints on the sides of the arms of the fork, creates the locking of the longitudinal articulation between the plate and the handle. 
           [0034]      FIG. 20  is the side view relative to  FIG. 19 . 
           [0035]      FIG. 21  shows the longitudinal section of the three elements joined together to make the articulation shown in  FIG. 20 . We can see, as said above, that the sled element, positioned with its protrusions in the conchoidal imprints on the sides of the arms of the fork of the handle-holding element, finds itself coupled with its male element in the female hollow of the base element, thereby locking the articulation in the longitudinal direction between the handle and the plate. 
           [0036]      FIG. 22  shows a longitudinal section corresponding to  FIG. 21  of the three elements joined together, where the sliding element is positioned in the upper course with its protrusions engaged in the upper conchoidal imprints on the surfaces on the side of the fork, and its male element is sufficiently distant from the summit of the female configuration of the base element with the attachment to the base, so as to allow a possible articulation in the longitudinal direction between the handle and the plate. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0037]    The functioning of the device with reference to the attached diagrams occurs as described. 
         [0038]    In the usual cleaning brushes with plate  2 , the articulation in the transversal direction in reference to the plate, between said plate and the handle  1 , takes place through the hinged coupling between the lower part of the base element  4  with the bridge-shaped crosspiece united with the supper surface of the plate  2 ; while the articulated joint, in the longitudinal direction with reference to the plane of the plate, between said plate  2  and the handle, takes place through hinging  6  of the lower part of the handle-holder  5  with the upper part of the base element  4 . 
         [0039]    The handle  1  is bonded to the handle-holding element  5  by means of a clamping ring nut  5 ′. 
         [0040]    To lock the longitudinal joint between handle  1  and plate  2 , according to the device of the patent, one proceeds as indicated below. 
         [0041]    You couple, by hinging, the lower part  8  of the base element  7  to the bridge-shaped crosspiece  3  joined to the plate  2  and you make the articulation that is transversal to the plane of the plate. 
         [0042]    You insert into the chamber of the arms  14  of the fork of the handle-holding  12  the sled element  20  with the male shaped element  21  facing the entrance of the fork until it couples with the guides  16  on the internal sides of the arms  14 . The wings  22  of the sled element  20  are juxtaposed to the side walls of the arms  14  of the fork while the protrusions  24 , with which they are fitted, during the sliding of the sled element  20 , couple with the conchoidal imprints  17 ,  18  on the side walls of the arms  14  of the fork. 
         [0043]    To allow the protrusions  24  of the wings  22  to elastically lift up when they are not in line with the conchoidal imprints  17 ,  18 , said wings  22  are separated from the body of the sled element  20  by means of slits  25  in their central extension. 
         [0044]    The movement up and down of the sled element  20  is carried out by acting on the side arms  23  with which the sled element is fitted. 
         [0045]    You insert the upper end  11  of the base element  7  into the fork  14  until the holes  15  are aligned with the hole  9  of the base element. The articulation in the longitudinal direction with respect to the plane of the plate  2  is realised by applying the hinge pin, which has not been drawn. 
         [0046]    To realise the locking of the above-mentioned joint, the handle-holding element  12  is positioned so that the hollow  10  of the base element  7  is in a central position with respect to the arms  14  of its fork. 
         [0047]    It is slid down, the sliding element  20  acting on the arms  23  so that its male element  21  engages the cavity  10  of the base element  7  and its protrusions  24  of the wings  22 , freeing themselves from the conchoidal imprints  17 , engage with the lower conchoidal imprints  18  of the above-mentioned arms. 
         [0048]    To release the operations are carried out in the reverse order to the locking. 
         [0049]    In the explanatory drawings relative to the diagrams successive to  FIG. 1 , neither the clamping ring nut  5 ′ of the handle  1 , nor the handle has been drawn; while we can see the elastic tightening appendages  13  and the thread for screwing the ring nut element  12 . 
         [0050]    Remember that the maneuver for locking and unlocking the articulated joint in the longitudinal direction of the sweeper plate, with plate  2  fitted with the device of this patent, is carried out by using the foot (or shoe) on the arms  23  of the sled element  20 . 
         [0051]    What has been just described is by way of example, so variations, and improvements, to the device carried out by an expert in the field do not detract from the invention when the instruction so of the above-mentioned patent are used.