Abstract:
A light-source mechanism for an optical scanner includes a chassis, a lamp, a lamp holder and a buffering device between the chassis and the lamp holder. If the buffering device is subjected to an external force of impact and vibration, the buffering device may effectively absorb the influence of the external force, such that the lamp generally will not be damaged.

Description:
FIELD OF THE INVENTION 
     The invention relates to an improvement of the light-source mechanism for an optical scanner, especially to a kind of invention used for the light-source mechanism in an optical scanner. 
     BACKGROUND OF THE INVENTION 
     Accordingly, the development of computer industry is so rapid, not only has the CPU (i.e., Central Processing Unit) processing speed of a computer exceeded 2 GHz, but also computer accessories have progressed toward the goals of lightness, thinness, shortness, and smallness. In the meantime, because of the prevalence of the computer internet or Local Area Networks (LAN); the requirement for making a home page has increased significantly and, when making a home page, a scanner is an indispensably important instrument. The action principle of a scanner is first to place a document into the scanner, wherein the image data of the document is transferred to a lens and CCD (i.e., Charge-Coupled Device) through a specific length of an optical path, then the image of the document is converted into electronic data, which is stored in a storing device of a computer (such as hard disk, optical disc, . . . , etc.), such that after scanning the electronic data may be edited, processed, and applied, so the scanner is an indispensable device for a computer accessory in the business of making a home page or editing a document. 
     Please refer to  FIG. 1 , which is a prior art that applies a fixing structure  25  in the two sides of a lamp holder  2  for directly fixing a lamp  3  and the lamp holder  2  into the bucking hole (not shown in the figure) of a chassis  1  (a portion of which is shown in the figure). The interior of the chassis not only may accommodate the lamp  3 , but also has a plurality of reflection mirrors, a lens, and a CCD. Because the internal components of the chassis  1  belong to the prior arts of a common scanner, they will not be repetitiously described herein. Additionally, the lamp holder  2  not only has the function of fixing the lamp  3 , but also a reflection surface (not shown in the figure) is arranged in the concave accommodating groove of the lamp for providing a specific direction and area of the emission of the light source of the lamp  3 , which enhances the intensity of the light source. 
     However, it is impossible for above-said fixing structure to provide a buffering structure for the lamp  3  and the lamp holder  2  so, in a moving procedure of the scanner, when the scanner is dropped down to the ground because of carelessness, all the vibrating force will be concentrated upon the lamp  3  and the lamp holder  2 . Since the technique for making the lamp  3  is quite precise—the specification of the diameter of some lamp  3  is only around 0.16 cm and its hardness and toughness are relatively weak—so it is easy for the lamp to break. Therefore, the invention is a solution for this problem, wherein a buffering device is provided between the chassis and the lamp holder, such that the lamp generally will not break because of the vibration of an external force. 
     SUMMARY OF THE INVENTION 
     In order to solve the shortcoming of the prior arts described thereinbefore, the invention is an improvement of the light-source mechanism for an optical scanner. The main objective of the invention is to provide a buffering device between the chassis and the lamp holder and, when the buffer is subjected to an external force of impact and vibration, it may effectively absorb the influence of the external force, such that the lamp will not be damaged and the completeness of the lamp may be maintained. 
     Preferably, in the connecting space between the chassis and the lamp holder, a spring piece is formed by integrating with the chassis as one body, such that it may effectively avoid the lamp to be impacted by the external force or be influenced by the vibration. 
     Preferable, in the connecting space between the chassis and the lamp holder, a rubber block may be appropriately placed in, such that it may effectively avoid the lamp to be impacted by the external force or be influenced by the vibration. 
     Preferable, in the connecting space between the chassis and the lamp holder, a sponge may be appropriately placed in, such that it may effectively avoid the lamp to be impacted by the external force or be influenced by the vibration. 
     Preferable, in the connecting space between the chassis and the lamp holder, a spring may be appropriately placed in, such that it may effectively avoid the lamp to be impacted by the external force or be influenced by the vibration. 
     For your esteemed reviewing committee to further understand the operational principle and the other function in a more clear way, a detailed description in cooperation with corresponding drawings are presented as follows. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a 3-D structure view for the chassis and the lamp holder according to the prior arts. 
         FIG. 2  is an illustration for the first embodiment for adding a buffering device between the chassis and the lamp holder according to the invention. 
         FIG. 3  is an illustration for the second embodiment for adding a buffering device between the chassis and the lamp holder according to the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     A detailed structure in matching with the corresponding drawings and its connection relationship are presented as the following for facilitating your esteemed reviewing members in understanding the present invention. 
     Please refer to  FIG. 2 , which is an illustration for the first embodiment for adding a buffering device between the chassis and the lamp holder according to the invention, wherein a fixing structure  55  extended along two sides of a lamp holder  5  for directly fixing a lamp  6  and the lamp holder  5  into the buckling hold (not shown in the figure) of a chassis  4  (a portion of which is shown in the figure). The interior of the chassis not only may accommodate the lamp  6 , but also has plurality of reflection mirrors, a lens and a CCD. Additionally, the lamp holder  5  not only has the function for fixing the lamp  6 , but also a reflection surface (not shown in the figure) is arranged in the concave accommodating groove of the lamp for providing a specific direction and area of the emission of the light source of the lamp  6 , and also enhances the intensity of the light source. 
     Besides the above structure, the invention specially provides a spring piece  7 , which is a plastic material and formed integrally as one body with a chassis  4 , between the chassis  4  and the lamp holder  5 . The optimal places for arranging the spring piece  7  are the fixing places of the two sides of the lamp  6 . Of course, the arranging place and the arranging number of the spring piece  7  may be adjusted and varied appropriately according to the different requirements, such as applying a spring piece  7  of large size to be arranged at the central place of the lamp  6 , or applying plural spring pieces  7  of small size to be uniformly distributed in the space between the lamp  6  and the chassis  4 . The spring piece  7  has the characteristics of elastic extension and contraction so, when the spring piece  7  is impacted by an external force and a vibration is generated, the spring piece  7  may absorb the external force and avoid the influence acting on the lamp  6  and the lamp holder  5 , such that the lamp  6  generally will not be damaged and its completeness may also be maintained. 
     Please refer to  FIG. 3 , which is an illustration for the second embodiment for adding a buffering device between the chassis and the lamp holder according to the invention. Besides the components and the assembling structure of the chassis  4 , the lamp holder  5 , and the lamp  6  disclosed in  FIG. 2 , the invention specially provides a buffering device  8  between the chassis  4  and the lamp holder  5 , and the optimal places for arranging the buffering device  8  are the fixing places of the two sides of the lamp  6 . Of course, the arranging place and the arranging number of the buffering device  8  may be adjusted and varied appropriately according to the different requirements. The buffering device  8  may be a piece of rubber block, sponge, or elastic spring, etc., while the buffering device  8  is not restricted to the exemplified device. Any material that may absorb vibration or have the characteristics of elastic extension and contraction is all belonged to the application field of the invention. Therefore, when the buffering device  8  is impacted by an external force and a vibration is generated, the buffering device  8  absorbs the external force and generally avoids the influence acting on the lamp  6  and the lamp holder  5 , such that the lamp  6  generally will not be damaged and its completeness may be also maintained. 
     From the structure disclosed from  FIG. 2  and  FIG. 3 , it may understand the main merits of the present invention is to provide a buffering device between the chassis and the lamp holder, while the buffering device is not necessarily an externally added structure, but also it may be a configuration that is a plastic material and is formed integrally with the chassis or the lamp holder as one body. All these variations belong to the claimed ranges of the present invention. By arranging a buffering device, it may really reduce the damaging probability of the lamp because of an external force. For the industry, the invention indeed has the value to be existed, so a patent application is proposed herein for seeking a protection by patent authority.