Abstract:
A rotary closure ( 1 ) having a carrying body ( 5 ) which carries a plug-in section ( 6 ) for plugging into a plug-in opening, in which the plug-in section ( 6 ) can be arrested by a retaining element ( 37 ) which can be rendered operational or non-operational by a rotary handgrip ( 4 ) being rotated, it being possible for the rotary handgrip ( 4 ) to be blocked by a combination lock having a plurality of number disks ( 10 ). For realizing a rotary closure which is of straightforward, compact construction and which can be used to close plug-in openings of objects of different configurations, there is provided a pull member ( 33 ) which can be displaced axially by the rotary handgrip ( 4 ) being rotated and is intended for actuating the retaining element ( 37 ).

Description:
FIELD AND BACKGROUND OF THE INVENTION 
     The invention relates to a rotary closure having a carrying body which carries a plug-in section for plugging into a plug-in opening, in which the plug-in section can be arrested by means of a retaining element which can be rendered operational or non-operational by virtue of a rotary handgrip being rotated, it being possible for this rotary handgrip to be blocked by means of a combination lock having a plurality of number disks. 
     A rotary closure of the abovementioned type is known from EP 0 740 122 A2, the rotary closure being formed as a trigger-blocking firearm lock. This is associated with the trigger unit of a handgun. The plug-in section is configured in the manner of a toothed strip and can be rendered operational or non-operational in relation to a retaining element by virtue of rotation. This retaining element is configured as a toothed slide which is spring-mounted transversely to the plug-in direction. 
     SUMMARY OF THE INVENTION 
     It is an object of the invention for a rotary closure of the generic type, while being of straightforward, compact construction, to be configured such that it can be used in a favorable manner to close plug-in openings of objects of different configurations. 
     This object is achieved first and foremost in the case of a rotary closure having the features of claim 1, this being based on providing a pull member which can be displaced axially by virtue of the rotary handgrip being rotated and is intended for actuating the retaining element. 
     Such a configuration gives a rotary closure of the type in question which is suitable for closing plug-in openings of different objects. These objects may be, for example, canisters, bottles or other types of container. For the purpose of closing a corresponding plug-in opening, the rotary closure has to be inserted into the plug-in opening by way of its plug-in section, which contains the retaining element. Rotation of the rotary handgrip then makes it possible to displace an axial pull member which, for its part, actuates the retaining element and moves the latter into the closed position in relation to the plug-in section. The more the pull member is displaced axially, the more intimately is the retaining element fitted within the plug-in opening. If the retaining element has reached its firmly seated position, the secret code of the combination lock may be adjusted if this has not already taken place, so that it is then no longer possible for the pull member to be actuated in order to render, for example, the retaining element non-operational. This proves to be advantageous in functional terms if the pull member is guided in a rotationally fixed manner in the carrying body and is in threaded engagement with the rotary handgrip. This makes it possible for the pull member to be adjusted in a stepless manner. Furthermore, co-rotation of the pull member during rotary adjustment and corresponding adverse effects on the axial displacement are prevented. Emphasis should, further, be placed on the fact that the retaining element is a compressible tube which increases in diameter by virtue of an axial pressure being applied. This configuration is suitable predominantly in the case of plug-in openings of bottles. For example, it is possible for parents to secure a spirit-containing bottle which has not yet been used up so that children cannot open it. It is also possible for bottles which contain cleaning agents etc. to be secured in this way. In order for it to be possible for the construction of the rotary closure to be of compact configuration, the number disks are oriented in a star-shaped manner in relation to the axis of rotation of the rotary handgrip and are seated on individual spindles. It is favorable in handling terms if the carrying body and the rotary handgrip overlap substantially completely in cross-section. In order to prevent the rotary handgrip from being rotated back once the secret code has been adjusted, there are provided blocking pins which run parallel to the axis of rotation and engage in blocking cutouts of the carrying body. The blocking cutouts are advantageously configured such that, once the secret code has been adjusted, they allow the rotary handgrip to be rotated forward in order to displace, for example, the pull member in the axial direction, this being accompanied by diameter-increasing compression of the compressible tube. In this case, the blocking pins run over the blocking-cutout flanks configured in the form of run-on slopes. In order for this to be possible, the run-on slopes are yieldable under spring loading. The combination lock is favorably constructed such that the blocking sleeves, which are rotationally coupled to the number disks, each have a flattened portion which, in the release position, is located in front of a head of the blocking pins, which are spring-loaded in the direction of the blocking sleeve. In accordance with the number of number disks, there is thus a corresponding number of blocking pins, which interact with the blocking sleeves associated with them. The operation of setting the predetermined secret code then presupposes that the blocking sleeves are rotated, via the number disks, such that the flattened portions are located in front of the heads of the blocking pins. Accordingly, these blocking pins may be displaced under spring loading such that they do not project into the blocking cutouts. As has already been mentioned in the introduction, such a rotary closure may favorably be configured as a bottle closure. The secret code may be altered as in the case of known combination locks. For this purpose, there is mounted in the rotary handgrip a rotary star which has actuating arms located in front of the blocking sleeves. The rotary star forms a hub through which the threaded spindle of the pull member passes and which has a tool-engagement surface. This makes it possible, for example by means of a screwdriver or by means of a coin, for the rotary star to be displaced, this being, combined with displacement of the blocking sleeves, which in the process are uncoupled from the number disks. The latter, for their part, may then be rotated in order for a different secret code to be selected. The operation of altering the secret code, however, presupposes that the blocking sleeves have previously been rotated such that the flattened portions of the blocking sleeves are located in front of the heads of the blocking pins. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     An exemplary embodiment of the invention is explained hereinbelow with reference to the drawings, in which: 
     FIG. 1 shows a view of a rotary closure which is configured according to the invention and is associated with a plug-in opening of a bottle, the compressible tube not yet being operational, 
     FIG. 2 shows a plan view of the rotary closure, 
     FIG. 3 shows a bottom view of the rotary handgrip, with the tool-engagement surface of the rotary star being visible, 
     FIG. 4 shows an illustration as in FIG. 1, but with the compressible tube operational, 
     FIG. 5 shows the section along line V—V in FIG. 4, 
     FIG. 6 shows the section along line VI—VI in FIG. 4, 
     FIG. 7 shows a section which is comparable with FIG. 6, but with the secret code set correctly, 
     FIG. 8 shows the section along line VIII—VIII in FIG. 4, 
     FIG. 9 shows a plan view of the carrying body, that is to say with the rotary handgrip omitted, 
     FIG. 10 shows the section along line X—X in FIG. 8, that region of the rotary handgrip which accommodates the number disks being omitted, 
     FIG. 11 shows a perspective illustration of the rotary closure, 
     FIG. 12 shows the exploded illustration, in perspective, of the rotary closure, and 
     FIG. 13 shows another perspective of the rotary closure in the non-assembled state. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The rotary closure is designated overall by the numeral  1 . According to the exemplary embodiment, it is in the form of a bottle closure, so that it is possible to use it to close the plug-in opening  2  of a bottle  3  firmly in a sealed manner, see FIG. 4 in particular. 
     In specific terms, the rotary closure  1  has a rotary handgrip  4 , which is circular in plan view, a carrying body  5 , which is ten-sided in plan view, and a plug-in section  6 , which projects beyond the end side of the carrying body  5 . The carrying body  5  and the rotary handgrip  4  here overlap completely in cross-section. 
     The rotary handgrip  4  is made up of two housing parts  7  and  8  which are disposed axially one behind the other and are connected firmly to one another by means of a screw  9 . The latter is screwed in from the lower end side of the housing part  8 , as seen in FIG.  3 . In the housing part  7 , three number disks  10  are oriented in a star-shaped manner in relation to the axis of rotation of the rotary handgrip  4 . Each number disk  10  engages, with part of its circumference, into in each case one cutout  11  of the housing part  7 , so that the number disks  10  are accessible from the end corner region of the housing part  7 . The number disks  10 , for their part, are seated on individual spindles  12  which are positioned in a chord-like manner in the housing part  7  and form the sides of an approximately isosceles triangle. These engage through the number disks  10 , with the interposition of blocking sleeves  13 . These are in alterable coupling engagement with the number disks  10 . Ten coupling-engagement positions are possible, in accordance with the number of digits on the circumference of the number disks. The engagement position of the blocking sleeve  13  in relation to the number disk  10  is maintained by a compression spring  14  seated on the spindle  12 . 
     Each blocking sleeve  13  is provided on its periphery with a flattened portion  15  which, with the secret code set correctly, is located in front of a head  16  of a blocking pin  17 , which is spring-loaded in the direction of the blocking sleeve  13 . Since there are three blocking sleeves  13 , three blocking pins  17  extend, with uniform angle distribution, in the housing part  8 . They are thus guided in the housing part  8  in an axis-parallel manner in relation to the axis of rotation of the rotary handgrip  4 . Compression springs  18  subject the blocking pins  17  to loading in the direction of the blocking sleeves  13 . If the number disks  10 , and thus the blocking sleeves  13 , are rotated and moved into the position according to FIG. 6, then the blocking sleeves  13  act, by way of their circular periphery, on the head  16  of the blocking pins  17  and displace these in the axially outward direction, this being accompanied by the blocking pins  17  projecting to a greater extent beyond the lower end border of the housing part  8 , see FIGS. 6 and 7. 
     The hub  19  of a rotary star  20  is mounted centrally in the housing part  8 . Three actuating arms  21  extend tangentially from the hub  19 , these actuating arms interacting with the facing end sides of the blocking sleeves  13 . By virtue of the rotary star  20  being rotated, it is thus possible for the blocking sleeves  13  to be uncoupled from the number disks  10 , the blocking sleeves  13  being displaced counter to the force of the compression springs  14 . The rotary displacement is accompanied by a small degree of axial displacement of the hub  19 , which has a compression spring  22  acting on it. Accordingly, for the purpose of resetting the secret code, the actuating arms remain in the position in which the blocking sleeves  13  are uncoupled. If the secret code has been reset, then rotary displacement of the rotary star  20  is only possible following previous axial displacement. It is then possible for the blocking sleeves, on account of their spring loading, to be coupled again to the number disks  10 . 
     The free end of the hub  19  engages through the lower end surface of the housing part  8  and projects beyond the same. A tool-engagement surface  23  in the form of a diametral slot is located in the projecting section. 
     In order to rule out any undesirable self-adjustment of the number disks  10 , the hub  19  of the rotary star  20  carries a spring ring  24  with radially directed arms  24 ′ which, for their part, interact with notches  10 ′ in the number disks  10 . In accordance with the number of digits on the number disks  10 , there is also a corresponding number of notches  10 ′ present. 
     The carrying body  5 , which partially encloses the lower border of the housing part  8 , allows the rotary handgrip  4  to be rotated. The carrying body  5  accommodates a rotationally secured blocking ring  25  in its interior. The rotational securing takes place by means of a radial pin  26  of the blocking ring  25 , which radial pin  26  penetrates into a radial groove  5 ′ of the carrying body  5 , see FIG. 9 in this respect. On its broad surface which is directed toward the blocking pins  17 , the blocking ring  25  forms three blocking cutouts  27  which are distributed uniformly over the circumference. With the secret code adjusted, the free ends of the blocking pins  17  engage in these blocking cutouts, see FIG.  6 . If the secret code has been properly set, this results in the case according to FIG. 7, in which the blocking pins  17  have their free ends located above the blocking cutouts  27 . One flank  27 ′ of the latter runs parallel to the axis of rotation of the rotary handgrip  4 , while the other flank  27 ″ is configured in the form of a run-on slope. The blocking ring  25  is spring-loaded in the direction of the blocking pins  17  by means of three compression springs  28  distributed uniformly over the circumference. By way of a radially outwardly directed collar  29 ′, an axially non-displaceable supporting ring  29  inserted into the carrying body  5  limits the axial displacement of the blocking ring  25  under the spring loading. 
     On the side opposite to the rotary handgrip  4 , the carrying body  5  continues into a reduced-diameter collar  30 . This is provided with a central through-passage opening  31  into which the carrying pin  32  of a pull member  33  penetrates. At its lower, free end, the carrying pin  32  continues into a larger-diameter flange plate  34 . At its upper end, the carrying pin  32  may be of such a nature that there is no possibility of rotation within the through-passage opening  31 , although axial displacement of the pull member is provided. At its upper end, according to FIG. 8, the carrying pin  32  continues into a threaded spindle  35 . This engages through the hub  19  of the rotary star  20  and penetrates into the internal thread  36  of the housing part  7  of the rotary handgrip  4 , see FIG. 8 in this respect. Between the flange plate  34  and the collar  30 , the carrying pin  32  carries a retaining element  37  which, in the exemplary embodiment, is configured in the form of a compressible tube. When the compressible tube  37  is relieved of stressing, its diameter is somewhat smaller than that of the flange plate  34 . The diameter of the flange plate  34 , in contrast, is somewhat smaller than that of the plug-in opening  2  of the bottle  3 . 
     Functioning is as follows: if the plug-in opening  2  of a bottle  3  is to be secured in a liquid-tight manner, then the rotary closure is to be fitted such that the plug-in section  6  is inserted into the plug-in opening  2 . The plug-in operation is possible with the compressible tube  37  relieved of stressing, in which case this compressible tube assumes the position according to FIGS. 1 and 8. The rotary handgrip  4  is then to be rotated in the clockwise direction, this being accompanied by the threaded spindle  35  being displaced inward into the rotary handgrip  4 . The flange plate  34  is displaced in this case, the compressible tube  37  being clamped in between the collar  30  and the flange plate  34 , and thus increasing in diameter. The rotary displacement of the rotary handgrip  4  here may take place with the secret code either set or adjusted. If the secret code has been adjusted, then, although the blocking pins  17  project into the blocking cutouts  27 , the blocking pins run over the flanks  27 ′ and, in the process, displace the blocking ring  25  in a ratchet-like manner in the direction of the base of the carrying body  5 . If the secret code has been set, then there is no ratchet-like action. Following sufficient rotation of the rotary handgrip  4  and increase in diameter of the compressible tube  37 , it is then possible for the secret code to be adjusted if this has not already been done. It is then no longer possible, on account of the blocking cutouts  27 , for the rotary handgrip  4  to be rotated back. In order for it to be possible to remove the rotary closure  1 , it is then necessary for the secret code to be set. Accordingly, the blocking pins  17  are consequently displaced, so that the free ends of the same leave the blocking cutouts  27  of the blocking ring  25 . The rotary handgrip  4  is then free for being rotated back, this latter operation allowing the pull member  33  to be displaced and the compressible tube  37  to be relieved of stressing. 
     If it is intended to alter the secret code, then the plug-in section  6  has to be released completely from the rotary handgrip  4 , this presupposing that the rotary handgrip  4  has been unscrewed from the threaded spindle  35 . Thereafter, the tool-engagement surface  23  is accessible, which allows the blocking sleeves  13  to be uncoupled from the number disks  10 , as has been described in the introduction. 
     The cross-sectional shape of the compressible tube  37  and/or of the plug-in section may be selected differently in accordance with the cross-sectional shape of the plug-in opening which is to be closed in each case.