Abstract:
A light source steadying assembly which fixes the relative distance between the lighting device and the transparent device by the elastic structure, such that all deformations induced by assembly and operation are absorbed. The elastic structure could be located in the gap between the chassis and the lighting device or in the gap between the lighting device and the transparent device. Further, the connecting structure is optional to be located in the gap without the elastic structure such that the angle between the transparent device and the lighting device is further fixed.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    This present invention relates to a light source steadying assembly, and more particularly, to a light source steadying assembly which fixes the relative distance between the lighting device and the transparent device by the elastic structure.  
           [0003]    2. Description of the Prior Art  
           [0004]    Those conventional arts will recognize that, for example, in a scanner, when a lighting device is mounted between a chassis and a transparent device for the light of the lighting device through the transparent device illuminating a object or further the lighting device moving relative to the transparent device. As is apparent form FIGS.  1 A- 1 B, the lighting device  11  is normally mounted on the chassis  12  (fixes the relative distance between the lighting device  11  and the transparent device  12 ), and kept the lighting device  11  and the chassis  12  each other to separate from the transparent device  13 . Therefore, on the one hand the lighting device is mounted on the edge of the transparent device  13  for illuminating efficiently a object  14  through the transparent device  13 , on the other hand the lighting device  11  moves relative to the transparent device  13  by moving the chassis  12 .  
           [0005]    Due to the processes of assembly hard to avoid the inaccuracy, for example, each device is not fabricated indeed as design or not fixed indeed; hard to avoid the collision when transporting; deformation and loose due to operation repeatedly. Those conventional arts will recognize two faults as listed below that:  
           [0006]    As shown in FIG. 1C, the trajectory of the chassis  12  and the transparent device  13  aren&#39;t parallel obviously. Therefore the brightness the lighting device  11  projecting to the object  14  is different on the different portion of the object  14  (assumed the lighting device  11  is stable), and so the operation of scanner etc causes departure due to the various distribute of brightness.  
           [0007]    As shown in FIG. 1D, the lighting device  11  and the transparent device  13  is not parallel obviously in the direction perpendicular the trajectory of the chassis  12 . And so, no matter the chassis  12  move or not, the brightness of the different portion of the object  14  illuminated from a lighting device  11  is different (assumed the lighting device is stable), and so the movement of scanner etc. cause departure due to the various distribute of brightness.  
           [0008]    Moreover, two faults as shown in FIG. 1C and 1D are not existing, as shown in FIG. 1E, due to a gap between the lighting device  11  and the transparent device  13 , the light  15  emitted by the lighting device  11  disperses around, and so the using efficiency of the lighting device  11  decreases. Of course, as shown in FIG. 1F, those conventional arts will recognize that the converging light assembly  16  is mounted on one side of the lighting device  11  facing the transparent device  13  for converging the light  15  to the transparent device  13 . Therefore, the using efficiency of the lighting device  11  can increase, but the extra cost also increase and the whole structure complicates.  
           [0009]    In accordance with the above-mentioned objects, those conventional arts will recognize that the lighting device is fixed and the efficiency of the lighting device increase simultaneously, it is hard to archive. Hence, it is need to further improve.  
         SUMMARY OF THE INVENTION  
         [0010]    It is another object of this invention to improve the method for fixing the lighting device to avoid the faults of those conventional arts.  
           [0011]    It is still another object of this invention to provide a light source steadying assembly to fix the lighting device and increase the efficiency of the lighting device simultaneously on the premise that the relationship between the chassis, the lighting device, and the transparent device doesn&#39;t change mainly.  
           [0012]    In this present invention, it provides that a light source steadying assembly is mounted in the gap between the lighting device and the chassis by a elastic structure for mounting the lighting device on the transparent device without space the transparent device. And, the elastic structure is generally in a compressed state for absorbing the deformation and displacement. Furthermore, a connecting structure is optional to be located in the gap between the lighting device and the transparent device for fixing the angle between the lighting device and the transparent device.  
           [0013]    In this present invention, another light source steadying assembly employs the elastic structure to connect the lighting device and the transparent device for fixing the relative position between the transparent device, the lighting device, and the chassis. And, the elastic structure is generally in a compressed state for absorbing the deformation and displacement. Furthermore, the connecting structure is optional to be located in the gap between the lighting device and the transparent device for fixing the angle between the lighting device and the transparent device. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]    [0014]FIG. 1A to FIG. 1F is a diagram showing the structure and the common faults of the light source steadying assembly in the conventional arts;  
         [0015]    [0015]FIG. 2A to FIG. 2J is a diagram showing some possible structure of a preferred embodiment in this present invention; and  
         [0016]    [0016]FIG. 3A to FIG. 3E is a diagram showing some possible structure of another preferred embodiment in this present invention 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0017]    In according with those common faults of those conventional arts, the inventor of this present invention first point out the key of that cause the faults:  
         [0018]    First: the lighting device contacts indirectly with the transparent device, and so avoids wastage due to friction, but hard to avoid the efficiency of the lighting device reducing or needing an extra converging lighting device.  
         [0019]    Second: due to the lighting device is mounted directly on the chassis, any space can&#39;t be a buffer to absorb the deformation and displacement as a result of the collision, the wastage, or the fault of assembly.  
         [0020]    Furthermore, the inventor of this present invention provides several ideas for solving efficiently the faults of those conventional arts:  
         [0021]    First: the lighting device is connected with the transparent device without space for avoiding those faults such as to reduce the efficiency of lighting device or to need an extra converging lighting device etc.  
         [0022]    Second: due to the lighting device being connected with the transparent device without space, the problem that is the friction therebetween causes. Therefore, a little gate is therebetween or a connecting structure is employed to connect the lighting device and the transparent device.  
         [0023]    Third: a little gate employed still causes those faults as well as those conventional arts except the fault of level being reduced. Therefore, the connecting structure employed is a better choice. Hence, a low friction of material is employed as the connecting structure for reducing the friction; the connecting area of the connecting structure and the transparent device is on the edge of connecting structure and the transparent device (or isn&#39;t on the center between a processed material and the lighting portion of lighting device) for reducing the influence.  
         [0024]    Forth: a elastic structure is employed for absorbing the deformation and displacement induced by the collision, the wastage, and the fault of assembly. Due to the specifications and the functions of the cassis, the lighting device, and the transparent device are definite, the best method is that the elastic structure is installed invariably on the lighting device, such as a spring, a leaf spring etc.  
         [0025]    Fifth: only if the application of the elastic structure archives the absorbing function between the cassis, the lighting device, and the transparent device. And, it is unlimited the elastic structure particularly or unlimited the elastic structure to be installed between the chassis and the lighting device or between the lighting device and the transparent device.  
         [0026]    According to the above-mentioned, a preferred embodiment of this present invention is a light source steadying assembly. As shown in FIG. 2A, the basic composition of the embodiment comprises an elastic structure  21 . The elastic structure  21  connects a lighting device  22  and a chassis  23 , and the lighting device  22  is between the chassis  23  and a transparent device  24 . Wherein, the composing unit can be a spring, a leaf spring, a sheetmetal, a leaf plastic, a ribbing structure, a curved structure, a leaf rubber, or one selected from the group consisting of the above-mentioned units. The material of the transparent device  24  can be a glass, a polysulfone, a plastic, or one selected from the group consisting of the above-mentioned units.  
         [0027]    Obviously, the elastic structure  21  between the lighting device  22  and the chassis  23  can absorb the deformation and the wastage between the lighting device  22 , the chassis  23 , and the transparent device  24 , as shown in FIG. 2B and FIG. 2C, to improve efficiently the faults of those conventional arts as shown in FIG. 1C and FIG. 1D.  
         [0028]    Furthermore, for archiving efficiently the absorbing function, as shown in FIG. 2D and FIG. 2F, the elastic structure  21  has some variations as listed below: the elastic structure  21  is to be in a compressed state for offsetting the downward gravitational displacement of those common configuration on the lighting device  22  (even the transparent device  24 ) upon the chassis  23 . The elastic structure  21  can comprise at least three elastic structures that aren&#39;t colinear each other for providing a support below the lighting source and reducing the possibility of slant due to the lighting device taking unbalanced force. The elastic structure  21  also can be between the center of gravity of the lighting device  22  and the chassis  23  for ensuring the relative displacement etc being absorbed by the elastic structure  21 .  
         [0029]    Besides, for avoiding the faults induced by the gap between the lighting device  22  and the transparent device  24 , the light source steadying assembly provided by this present embodiment allows the lighting device  22  to connect directly with the transparent device  23  (without space). It also can allow employing the connecting structure  25  to connect the lighting device  22  and the transparent device  24  (still with a gate, but contact directly by the connecting structure).  
         [0030]    Obviously, the variation as shown in FIG. 2G, the possibility of archiving the maximal efficiency of the variation is higher than the variation as shown in FIG. 2H, but the possibility of the fault of the fricative wastage is higher. Hence, when applying this present invention, the variation depend on actual demand is selected the maximal total efficiency. It is necessary to say that the variation as shown in FIG. 2H, improves the fault by narrowing the distance between the lighting device  22  and the transparent  24  and changing the structure and the material of the connecting structure  25 .  
         [0031]    Although the connecting structure is on two opposite extremities of the lighting device  22 , as shown in FIG. 2H, due to the main function of the connecting structure  25  is not absorbing displacement etc, one end of he connecting structure  25  connects with the transparent device  24  and other end connects with the sidewall of the lighting device  22 .  
         [0032]    In addition, for further controlling the angle between the transparent device  24  and the lighting device  23 , avoiding the variation of the angle between the transparent device  24  and the lighting device  23  to causing the brightness of the lighting source through the transparent device  24  projecting on a object unstable/disproportionate, as shown in FIG. 21, the connecting structure  25  comprises at least three connecting structures that aren&#39;t collinear each other. For avoiding the connecting structure  25  to affect the brightness of the lighting source  21  through the transparent device  24  projecting on a object, as shown in FIG. 2J, the connecting structure  25  is just installed between the portion of not lighting  221  of the lighting device and the transparent device  24  and not between the portion of lighting  222  of the light device and the transparent device  24 . Furthermore, for reducing the fricative wastage between the connecting structure  25  and the transparent device  24 , the material of the connecting structure  25  can be a plastic, a rubber, a material with low fricative coefficient, a material with low hardness or one selected from the group consisting of above-mentioned material.  
         [0033]    Another preferred embodiment according to this present invention is still a light source steadying assembly, as shown in FIG. 3A, comprising at least the elastic structure  31 . The elastic structure  31  connects the lighting device  32  and the transparent device  33 , and the lighting device  32  is between the transparent device  33  and the chassis  34 .  
         [0034]    Obviously, the main difference of this embodiment and the above-mentioned embodiment is the different position of the elastic structure  31 . The above-mentioned embodiment is that absorbs the deformation between the lighting device  22  and the chassis  23 . Hence, the detail of this embodiment is the same with the above-mentioned embodiment except relative directly to the position of an elastic module ( 21 &amp; 31 ).  
         [0035]    In other words, the composing unit of the elastic module can be:  
         [0036]    a spring, a leaf spring, a sheetmetal, a leaf plastic, a ribbing structure, a curved structure, a leaf rubber, or one selected from the group consisting of the above-mentioned. And, the matrial of the transparent device can be: a glass, a polysulfone, a plastic, or one selected from the group consisting of the above-mentioned units. Furthermore, the elastic structure  31  can be in a compressed state.  
         [0037]    For avoiding the elastic structure  31  affecting the normal motion of the lighting device, as shown in FIG. 3B, the elastic structure  31  is between a not lighting portion  322  and the transparent device  33 , wherein the lighting portion  321  and the not lighting portion  322  separate from the opposite surfaces of the lighting device  32  and the transparent device  33 . As shown in FIG. 3C, the elastic structure comprises at least three elastic structures that aren&#39;t collinear each other.  
         [0038]    The lighting device  32  can contact directly with the chassis  34 , as shown in FIG. 3D, or a connecting structure can be employed to connect the lighting device  32  and the chassis  34 , as shown in FIG. 3E. And, the connecting structure  35  is between the center-of-gravity position of the lighting device  32  and the chassis  34 , also can comprise at least three connecting structures that aren&#39;t collinear each other. Furthermore, the material of the connecting structure  35  can be a plastic, a rubber, a material with low fricative coefficient, a material with low hardness or one selected from the group consisting of above-mentioned material.  
         [0039]    Although specific embodiments have been illustrated and described, it will be obvious to those conventional arts that various modifications may be made without departing from what is intended to be limited solely by the appended claims.