Abstract:
An exhibition device for reversal spanners comprises a suspending plate having a buckling hole; a periphery of the buckling hole being formed with a notch so as to form as a confining unit; an inner side of the confining unit having a plurality of limiting teeth, and a seat; a connecting unit extending from the seat; the connecting unit being rotatably buckled to the buckling hole; a ratchet portion being formed on a surface of the connecting unit; the ratchet portion being not aligned to the notch; and the ratchet portion being engageable to the limiting teeth.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to exhibition devices, and in particular to an exhibition device for reversal spanners, wherein it can prevent the seat from rotating reversally and the reversal spanner will restore by idle rotation. Thereby the spanner can rotate bi-directionally. Thus the spanner suspending on the suspending plate can be tested easily by the buyers. Furthermore, the present invention can emit sound as the teeth thereof slides. The user can determine the smoothness of the driving operation.  
       BACKGROUND OF THE INVENTION  
       [0002]     Some prior arts, such as U.S. Pat. No. 6,375,005, U.S. Pat. No. 6,409,015 and U.S. Pat. No. 6,464,840 disclose structures about exhibition frames.  
         [0003]     In these prior arts, when a ratchet spanner restores, a hexagonal seat will rotate with the ratchet spanner due to the defect in the design of the seat and the suspending plate. Thereby the ratchet spanner loses the mechanism of idle rotation in restoring. However this is not beneficial in test. Thus in test, the user can only test the spanner in a predetermined direction. The user cannot know the smoothness of the spanner as the spanner idly rotates. Thereby the prior art is not an idle design.  
       SUMMARY OF THE INVENTION  
       [0004]     Accordingly, the primary object of the present invention is to provide an exhibition device for reversal spanners, wherein it can prevent the seat from rotating reversally and the reversal spanner will restore by idle rotation. Thereby the spanner can rotate bi-directionally. Thus the spanner suspending on the suspending plate can be tested easily by the buyers. Furthermore, the present invention can emit sound as the teeth thereof slides. The user can determine the smoothness of the driving operation.  
         [0005]     To achieve above objects, the present invention provides an exhibition device for reversal spanners which comprises a suspending plate having a buckling hole; a periphery of the buckling hole being formed with a notch so as to form as a confining unit; an inner side of the confining unit having a plurality of limiting teeth; and a seat; a connecting unit extending from the seat; the connecting unit being rotatably buckled to the buckling hole; a ratchet portion being formed on a surface of the connecting unit; the ratchet portion being not aligned to the notch; and the ratchet portion being engageable to the limiting teeth.  
         [0006]     Furthermore, the present invention provides an exhibition device for reversal spanners which comprises a suspending plate having a buckling hole; a periphery of the buckling hole; a front side has a ratchet portion at a periphery of the buckling hole; and a seat; a connecting unit extending from the seat; the connecting unit being rotatably buckled to the buckling hole; the seat having a diak; a bottom of the disk having notch as a limiting unit; a bottom of the disk being formed with teeth which is engageable to the ratchet portion.  
         [0007]     The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]      FIG. 1  is an exploded schematic view about the exhibition device for reversal spanners of the present invention.  
         [0009]      FIG. 2  is a perspective view about the exhibition device for reversal spanners of the present invention.  
         [0010]      FIG. 3  shows the use of the present invention, wherein the exhibition device for reversal spanners of the present invention is combined with a reversal spanner.  
         [0011]      FIG. 4  is a plane view about the, exhibition device for reversal spanners of the present invention.  
         [0012]      FIG. 5  is a schematic view along line A-A of  FIG. 4 .  
         [0013]      FIG. 6  is a schematic view about the operation of reversal rotation of the seat of the exhibition device for reversal spanners of the present invention.  
         [0014]      FIG. 6A  is a partial enlarged view of  FIG. 6 .  
         [0015]      FIG. 7  is an exploded schematic view about the second embodiment of the exhibition device for reversal spanners of the present invention.  
         [0016]      FIG. 8  is a structural perspective view of the second embodiment of the exhibition device for reversal spanners of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0017]     In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.  
         [0018]     Referring to FIGS.  1  to  5 , the exhibition frame  1  of the present invention has the following elements.  
         [0019]     A suspending plate  10  has a buckling hole  11 . A scale portion  12  is formed around the buckling hole  11 . A suspending hole  13  is formed above the buckling hole  11 . At least one post  14  is installed below the buckling hole  11 . One side of the buckling hole  11  is formed with a notch  15 . A periphery of the notch  15  is formed with a long confining unit  16 . An inner side of the confining unit  16  is formed with a plurality of teeth  161  with 45 degrees sides. Two symmetrical slits  17  are formed aside the confining unit  16 . An elastic sheet  18  is formed between the two slits  17 . A front end (inner side) of the elastic sheet  18  is formed as an inclined tip portion  181 .  
         [0020]     A seat  20  has a hexagonal shape. A lower end of the seat  20  is extended with a bar-like connecting unit  21 . At the connection of the seat  20  and the connecting unit  21  is formed with an enlarged disk  22 . A triangular indication  221  extends from the disk  22 . A lower surface of the connecting unit  21  is formed with a cruciform slot. Thus, when the connecting unit  21  is compressed, it will reduce inwards. Thus, the connecting unit  21  can be inserted into the buckling hole  11  and then it is buckled to the suspending plate  10  by a buckle  23  of the seat  20  to resist against a rear surface of the suspending plate  10 .  
         [0021]     A limiting frame  30  has a T shape connecting plate  31  and a U shape frame plate  32 . A top end of the connecting plate  31  has a toggle  311  and a lower end thereof is transversally extended with a plate like sealing plate  312 . A surface of the sealing plate  312  is formed with a plurality of strips  313 . One side of the sealing plate  312  is formed with a buckling hole  314  and another side thereof is integrally extended with a frame plate  32 . One lateral side of the frame plate  32  has a wing  321  which can be adhered to the sealing plate  312 . A surface of the wing  32  is installed with a buckle body  322  capable of being combined to the buckling hole  314  so that the connecting plate  31  and the frame plate  32  are formed with a receiving portion  33  which can be opened. Thereby a reversal spanner  50  can be received in the two short sides of the receiving portion  33  so as to form as a clamping sheet  34  for clamping the reversal spanner  40 . Above mentioned structure is the structure of the present invention.  
         [0022]     Assembly of the present invention will be described herein. The toggle  311  at the top of the T shape connecting plate  31  is suspended to the connecting unit  21  of the seat  20 . Then the connecting unit  21  is pressed into the buckling hole  11 . The buckle  23  at the front end thereof resists against the suspending plate  10 . Then a reversal spanner (in this embodiment, it is a reversal adjustable spanner, however it can be an open mouth spanner or a ratchet wheel spanner) passes through the receiving portion  33  formed by the connecting plate  31  and the frame plate  32 . The strips  33  on the surface of the sealing portion  312  will press and the spanner and the elastic sheet 2   34  at two sides will elastically clamp the spanner. Thereby the driving portion of the spanner  40  will be engaged to the hexagonal seat  3 . The ratchet wheel  24  at the surface of the connecting unit  21  of the seat  20  is engaged to the teeth  161  of the confining unit  16 . Meanwhile, it is horizontally engaged to the tip portion  181  of the elastic sheet  18 .  
         [0023]     In use, the user holds the handle of the spanner  50  to rotate clockwise toward the post  14 . The post  14  is limited not to move forwards. The spanner  50  will drive the seat  20  to rotate with the seat  20 . The ratchet portion  24  of the seat  30  will be engaged to the teeth  161  of the confining unit  16  and the tip portion  181  at the front end of the elastic sheet  18 . They will emit sound as the teeth slides. Thereby the user can adjust the smoothness of the driving operation.  
         [0024]     The reason that the seat  20  can rotate along a predetermined direction is that the seat  20  will press the confining unit  16  to move toward the notch  15 . The seat  20  will rotate by the driving operation of the spanner  40 .  
         [0025]     On the contrary, referring to  FIGS. 6 and 6 A, when the reversal spanner  50  restores along a reversal direction, it will drive the seat  30  to rotate reversally. The seat  20  is limited by the resisting affect of the confining unit  16  and the ratchet portion  24  of the connecting unit  21 , the ratchet  24  will be stopped by the confining unit  16 . Thereby the spanner  40  will rotate idly for next use.  
         [0026]     In the present invention, the suspending plate  10  is installed with a confining unit  16  corresponding to the ratchet portion  24  of the seat  20 . It can prevent the seat  20  to rotate reversally and the reversal spanner  40  will restore by idle rotation. Thereby the spanner can rotate bi-directionally. Thus the spanner suspending on the suspending plate can be tested easily by the users.  
         [0027]     Referring to  FIGS. 7 and 8 , the second embodiment of the present invention is illustrated. Those identical to the first embodiment will be identified by the same numerals. Thus the details will not be described herein.  
         [0028]     In this embodiment, a bottom side of the disk  22  is formed with a notch B. A limiting unit C is formed aside the notch B. A bottom of the limiting unit C is formed with a plurality of teeth D. One side of each tooth D is an inclined surface and another side thereof is a vertical surface.  
         [0029]     A ratchet portion A is installed at a front surface of the suspending plate  10  and at a periphery of the buckling hole  11 . The ratchet portion A has a teeth which is engageable to the limiting teeth D. When the seat  20  is driven by a reversal spanner  40  to rotate along a predetermined direction, the inclined sides of the limiting teeth D will slide to make the limiting unit C to rotate toward the notch B. If the seat  20  is driven to rotate by the reversal spanner  40  to rotate reversally, it is limited by the engagement of the ratchet portion A at the front end surface of the suspending plate  10  and the limiting teeth D. Thereby the seat  20  is prevented from being driven reversally.  
         [0030]     The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.