Abstract:
An adjusting device for an illumination component of a microscope, an illumination device and a microscope containing the adjusting device are disclosed. The adjusting device for an illumination component of a microscope includes a first barrel component having an axis; a second barrel component received in the first barrel component, the second barrel component having an axis coincident with or parallel to the axis of the first barrel component, wherein the second barrel component houses and supports the illumination component; and a plurality of set screws each having a first end coupled to a side wall of the first barrel component at a corresponding coupling point and a second end pressed against a side wall of the second barrel component. With embodiments of the present invention, the structure is simpler and the cost is lower.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority of Chinese patent application number 201420242651.7 filed May 13, 2014, the entire disclosure of which is incorporated by reference herein. 
       TECHNICAL FIELD 
       [0002]    The present invention relates to the field of microscopy, and more particularly to an adjusting device for an illumination component of a microscope, a microscope illumination device and a microscope containing the adjusting device. 
       BACKGROUND OF THE INVENTION 
       [0003]    In general, a microscope includes an illumination component for illuminating the object to be observed placed on the table of the microscope, for example, a condenser. Generally, the illumination component can be adjusted through an adjusting device so as to condense the light to a desired position. Typically, the movement of the illumination component is achieved using a rack structure. But the rack structure occupies a larger space, and imposes a high requirement on the attachment face, thereby resulting in a higher cost. 
       SUMMARY OF THE INVENTION 
       [0004]    The present invention provides a simpler, more cost-effective adjusting device for an illumination component of a microscope, an microscope illumination device and a microscope containing the adjusting device. 
         [0005]    According to an aspect of the present invention, an adjusting device for an illumination component of a microscope is provided, which includes: 
         [0006]    a first barrel component having an axis; 
         [0007]    a second barrel component received in the first barrel component, the second barrel component having an axis coincident with or parallel to the axis of the first barrel component, wherein the second barrel component houses and supports the illumination component; and 
         [0008]    a plurality of set screws each having a first end coupled to a side wall of first barrel component at a corresponding coupling point and a second end pressed against a side wall of the second barrel component. 
         [0009]    According to one embodiment, the adjusting device further comprises a support arm, one end of which is secured to the first barrel component. 
         [0010]    According to one embodiment, when in use, the illumination component is secured to the second barrel component and is contained in a space inside the second barrel component. 
         [0011]    According to one embodiment, when in use, the other end of the support arm is secured to a main body of the microscope, such that the axes of the first and second barrel components are perpendicular to a surface of a table of the microscope. 
         [0012]    According to one embodiment, when in use, a friction force between the second end of each of the plurality of set screws and the second barrel component is such that the second barrel component held at rest relative to the second barrel component, and can slide up and down relative to the first barrel component in a direction of said axis of the first barrel component, for example when an external force is applied thereto. 
         [0013]    According to one embodiment, the second end of each set screw is made of material which provides friction and has resiliency. 
         [0014]    According to one embodiment, the second end of each set screw is made of engineering plastics. 
         [0015]    According to one embodiment, the second end of each set screw is made of nylon material. 
         [0016]    According to one embodiment, the second end of each set screw is made of Teflon material. 
         [0017]    According to one embodiment, the first end of each set screw is coupled to the side wall of the first barrel component through a threaded hole in the side wall of first barrel component. 
         [0018]    According to one embodiment, the plurality of set screws includes a first set screw and a second set screw, wherein a line connecting between the coupling point of the first set screw and the coupling point of the second set screw passes through the axis of the first barrel component and is perpendicular to such axis. 
         [0019]    According to one embodiment, the plurality of set screws includes a first set screw, a second set screw and a third set screw, wherein respective coupling points of the first, second and third set screws are angularly spaced apart from one another about the axis of the first barrel component by an equal angular interval and are located in a plane perpendicular to the axis of the first barrel component. 
         [0020]    According to one embodiment, the plurality of set screws further includes a fourth set screw, wherein a line connecting between the coupling point of the fourth set screw and the coupling point of one of the first, second and third set screws is parallel to the axis of the first barrel component. 
         [0021]    According to one embodiment, respective coupling points of the first, second and third set screws are located in an upper part of the side wall of the first barrel component, and the coupling point of the fourth set screw with the side wall of the first barrel component is located in a lower part of the side wall of first barrel component. 
         [0022]    According to one embodiment, the plurality of set screws further comprises a fifth set screw and a sixth set screw, wherein a line connecting between the coupling points of the first and the fourth set screws, a line connecting between the coupling points of the second and the fifth set screws, and a line connecting between the coupling points of the third and the sixth set screws are all parallel to the axis of the first barrel component. 
         [0023]    According to one embodiment, the respective coupling points of the first, second and third set screws are located in an upper part of the side wall of first barrel component, and the respective coupling points of the fourth, fifth and sixth set screws are located in a lower part of the side wall of the first barrel component. 
         [0024]    According to one embodiment, the adjusting device further comprises a first set rod and a second set rod, wherein length directions of both the first and second set rods are parallel to the axis of the first barrel component and are aligned respectively with the coupling points of two of the first, second and third set screws. 
         [0025]    According to one embodiment, the respective coupling points of the first, second and third set screws are located in an upper part of the side wall of the first barrel component, the coupling point of the fourth set screw is located in a lower part of the side wall of first barrel component, and the first and second set rods are located in the lower part of the side wall of the first barrel component. 
         [0026]    According to one embodiment, the side wall of the second barrel component has a bar groove which extends parallel to the axis of the second barrel component, and the adjusting device further comprises at least one anti-rotation screw having a first end coupled to the side wall of the first barrel component and a second end is received in and pressed against the bar groove and can slide along the bar groove. 
         [0027]    According to one embodiment, the side wall of the second barrel component has a bar groove which extends parallel to the axis of the second barrel component, and the second end of at least one of the plurality of set screws is received in and pressed against the bar groove and can slide along the bar groove. 
         [0028]    According to one embodiment, the first end of at least one of the plurality of set screws has a head which protrudes from the side wall of the first barrel component to facilitate manual adjustment. 
         [0029]    According to one embodiment, the side wall of the second barrel component includes a bar groove which extends parallel to the axis of the second barrel component, the bar groove has at least one stop hole therein, and the adjusting device further comprises a stop component having a first end coupled to side wall of the first barrel component and a second end received in and pressed against the bar groove, wherein the second end of the stop component can slide along the bar groove and be stopped in the at least one stop hole. 
         [0030]    According to one embodiment, the stop component includes a secure screw, a spring and a steel ball, wherein a first end of the secure screw is coupled to the side wall of the first barrel component, the spring is coupled to the secure screw, and the spring is arranged to bias the ball into the at least one stop hole. 
         [0031]    According to another aspect of the present invention, an illumination device for a microscope is provided, said illumination device includes: 
         [0032]    an adjusting device as mentioned above; and 
         [0033]    an illumination component, which is secured to the second barrel component of said adjusting device and is contained in a space inside the second barrel component. 
         [0034]    According to another aspect of the present invention, a microscope including the illumination device as mentioned above is provided. 
         [0035]    With the adjusting device, the illumination device or the microscope including the adjusting device according to embodiments of the present invention, due to elimination of gear and rack parts of a traditional adjusting device, the structure of the present invention is simpler, more convenient to machine, and eliminates the requirement on the attachment face, thereby needing less space and lower cost. In addition, since a nylon head is utilized by the set screws as a friction means in some embodiments, the risk of the outside wall of the barrel component being scratched is reduced. Furthermore, in some embodiments, the adjusting device may comprise a support arm one end of which when in use is secured to the first barrel component and the other end is secured to the main body of a microscope to support the adjusting device, therefore the adjusting device integrates two functions of supporting the illumination component and moving the condenser. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWING VIEWS 
         [0036]      FIG. 1  is an overview of a microscope incorporating an adjusting device according to one embodiments of the present invention. 
           [0037]      FIGS. 2   a  and  2   b  are schematic views respectively of the adjusting device in different adjusting states according to embodiments of the present invention. 
           [0038]      FIG. 3  is an enlarged elevation view of the adjusting device according to embodiments of the present invention, wherein a part of the side wall of the support arm is removed, thereby exposing the structure inside. 
           [0039]      FIGS. 4   a  and  4   b  are side and front perspective views of the adjusting device according to embodiments of the present invention. 
           [0040]      FIG. 5  is a cross-sectional view taken along the bar groove of the adjusting device according to embodiments of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0041]      FIG. 1  shows a microscope including an illumination component contained in an adjusting device.  FIG. 1  shows two constituent parts of the adjusting device: a first barrel component  114  and a second barrel component  115 . Wherein, the second barrel component  115  for housing and supporting the illumination component is encased in the first barrel component, and their respective axes coincide with or are parallel to each other. In respective embodiments of  FIG. 1  and the following, for the sake of brief, the axes OO′ of the first barrel component  114  and the second barrel component  115  are described and shown as coinciding with each other. In use, the illumination component is secured to the second barrel component  115  and is contained in the space inside the second barrel component  115 . Also shown in  FIG. 1  is a support arm  116 , one end of which is secured to the first barrel component  114 , and when in use, the other end is secured to the main body  1  of the microscope, such that the axis OO′ of the first barrel component  114  and the second barrel component  115  is perpendicular to the surface of the table  2  of the microscope. Although in the accompanying drawings the support arm  116  is shown as a curved streamline shape, it may be understood that the support arm  116  can take any other suitable shapes. In the following description, although the adjusting device and the support arm  116  are described as separate parts, in some other embodiments, the adjusting device includes the support arm  116 , and the first barrel component  114  of the adjusting device is formed integrally with the support arm together. Also shown in  FIG. 1  is a screw  109  protruding from side wall of the first barrel component  115 . In the following, the structure of the adjusting device according to the embodiments of the present invention will be described in detail in conjunction with  FIGS. 1-5 . 
         [0042]    In one embodiment, in addition to the first barrel component  114  and the second barrel component  115 , the adjusting device also comprises a plurality of set screws, one end of each of which is coupled to a side wall of the first barrel component  114 , and the other end is pressed against the a side wall of the second barrel component  115 . In one example, each set screw is coupled to the side wall of the first barrel component by being inserted into a threaded hole in the side wall of the first barrel component. The pressure generated due to the other end of the adjusting device abutting against the side wall of the second barrel component  115  can be adjusted by tightening or loosening the set screw in the threaded hole, thereby varying the friction force between the other end of the set screw and the side wall of the second barrel component  115 . In one example, the other end of each set screw is made of material that can provide friction and has resiliency, for example engineering plastics, wherein appropriate engineering plastics includes for example nylon or Teflon material. When mounted on a microscope, by tightening or loosening the set screw, the friction force between the other end of the set screw and the side wall of the first barrel component  114  can be maintained at a proper degree, such that the second barrel component  115  is held at rest with respect to the first barrel component  114  and can slide in the direction of axis OO′ along the side wall of the first barrel component  114  during the period of application of a proper external force. In this way, after being mounted on the microscope, the first barrel component  114  and the second barrel component  115  are maintained in a relative rest if there is no need to adjust the illumination component, and an upward or downward force can be exerted on the second barrel component  115  when there is a need to adjust the illumination component to cause the second barrel component  115  to slide up and down relative to the first barrel component  114  in the direction of axis OO′. 
         [0043]    In one example, the plurality set screws included two set screws: a first set screw and a second set screw, wherein a line connecting between a coupling point of the first set screw at which its one end is coupled to the side wall of the first barrel component and a coupling point of the second set screw at which its one end is coupled to the side wall of the first barrel component passes through the axis of the first barrel component and is perpendicular to the axis. The first barrel component and the second barrel component remain at rest relative to one another under the action of the two set screws where there is no external force, and during the period when an upward or downward force is applied to the second barrel component  115 , the second barrel component  115  can slide up and down relative to the first barrel component  114  in the direction of axis OO′. 
         [0044]    Another example is shown in  FIGS. 2-5 . In the example, the plurality of set screws includes a first set screw  101 , a second set screw  110  and a third set screw  111 , respective coupling points of which with the side wall of the first barrel component  114  are spaced apart by an equal angular interval about axis OO′ and are located in a plane that is perpendicular to the axis OO′. 
         [0045]    Optionally, as shown in  FIGS. 2-5 , the plurality of set screws further comprises a fourth set screw  102 , the coupling point of which with the side wall of the first barrel component  114  and the coupling point of the first set screw  101  with the side wall of the first barrel component  114  are aligned with each other in the direction of axis LL′, namely the line connecting between the coupling point of the fourth set screw  102  with the side wall of the first barrel component  114  and the coupling point of the first set screw  101  with the side wall of the first barrel component  114  is parallel to the axis OO′. Optionally, respective coupling points of the first set screw  101 , the second set screw  110  and the third set screw  111  with the side wall of the first barrel component are located in an upper part of the side wall of the first barrel component  114 , and the coupling point of the fourth set screw  102  with the side wall of the first barrel component  114  is located in a lower part of the side wall of the first barrel component  114 . 
         [0046]    Optionally, as shown in  FIGS. 2-5 , in addition to the aforesaid set screws, the adjusting device further comprises a first set rod  112  and a second set rod  113  which are coupled to the first barrel component  114  and pressed against the side wall of the second barrel component  115 , the length direction of each set rod being parallel to the axis OO′ and aligned respectively with the coupling points of the second set screw  110  and the third set screw  111  with the side wall of the first barrel component  114 . In one example, the first set rod  112  and the second set rod  112  are inserted into respective slots located at the bottom of the first barrel component  114 . It is understood that the first set rod  112  and the second set rod  113  can be coupled to the first barrel component  114  in any other proper manners. Optionally, each set rod is made of material which can provide a friction and has resiliency, for example engineering plastics, wherein appropriate engineering plastics include for example nylon or Teflon material. When the second barrel component  115  slides up and down relative to the first barrel component  114 , the first set rod  112  and the second set rod  114  parallel to the axis OO′ can provide a friction moment which prevents the rotation of the second barrel component  115  about the axis OO′. Furthermore, the rotation or inclination of the second barrel component  115  can be prevented by the alignment of the fourth set screw  102 , the first set rod  112  and the second set rod  114  with the first set screw  101 , the second set screw  110  and the third set screw  111 , respectively. 
         [0047]    Optionally, the first set rod  112  and the second set rod  113  can be replaced by two set screws, and one end of each of which is coupled to the side wall of the first barrel component  114  and the other end is pressed against the side wall of the second barrel component  115 . Similarly, the other end of each set screw may be made of material that can provide a friction and has resiliency, for example engineering plastics, wherein appropriate engineering plastics includes for example nylon or Teflon material. Optionally, these two set screws are located in a same plane as the fourth set screw  102  and respectively aligned with the first set screw  101 , the second set screw  110  and the third set screw  111  in the direction of the axis OO′. 
         [0048]    Optionally, as shown in  FIGS. 2-5 , there is a bar groove  108  parallel to the axis OO′ on the side wall of the second barrel component  115 . In one example, the other end of at least one set screw of the plurality of set screws above mentioned are pressed against in the bar groove  108  and can slide up and down along the bar groove  108 . Such a structure can also prevent the rotation of the second barrel component  115 . Alternatively, at least one anti-rotation screw  103  can be included additionally, one end of which is coupled to the side wall of the first barrel component  114 , and the other end is pressed against in the bar groove  108  and can slide up and down along the bar groove  108 . Optionally, at least one of the above mentioned set screws and/or anti-rotation screw  103  can be made of material that can provide a friction and has resiliency, for example engineering plastics, wherein appropriate engineering plastics includes for example nylon or Teflon material. Optionally, the coupling point of the anti-rotation screw with the first barrel component  114  is located in a upper part of the side wall of the first barrel component  114 . 
         [0049]    Optionally, as shown in  FIGS. 2-5 , the adjusting device can also include an adjusting screw  109 , one end of which is coupled to the side wall of the first barrel component  114  and the other end is pressed against the side wall of the second barrel component  115 . Where, as shown in the figure, the head of one end of the adjusting screw  109  protrudes from the side wall of the first barrel component  114  for pinching by the fingers of the operator to rotate in or out the adjusting screw  109 . By rotating in or out the adjusting screw  109 , the pressure with which it abuts against the second barrel component  115  can be adjusted, thereby adjusting the friction force between its other end and the side wall of the second barrel component  115 . In one example, where the adjusting screw  109  is tightened properly, even in the presence of external force up-wards or down-wards, the second barrel component  115  will not slide readily relative to the first barrel component  114 ; and when the illumination component needs to be adjusted up and down, the adjusting screw  109  can be unscrew, such that the second barrel component  115  can slide up and down relative to the first barrel component  114  under a force upwards or downwards. In one example, the end of the adjusting screw  109  abutting against the second barrel component  115  is made of rigid material. In another example, the end of the adjusting screw  109  abutting against the second barrel component  115  is made of material that can provides a friction and has resiliency, for example engineering plastics, wherein appropriate engineering plastics includes for example nylon or Teflon material. 
         [0050]    Optionally, as shown in  FIGS. 2-5 , there is at least one, for example three, stop holes  107  in the bar groove  108 . Optionally, the adjusting device further comprises a stop component, one end of which is coupled to the side wall of the first barrel component  114 , and the other end is pressed against in the bar groove  108  and can slide up and down along the bar groove  108  and be located in the stop holes  107 . In the example as shown in the figure, the stop component comprises a secure screw  106 , a spring  104  and a steel ball  105 , wherein one end of the secure screw  106  is coupled to the side wall of the first barrel component  114 , the spring is fitted over the secure screw  106 , one end of the spring is coupled to the secure screw  106  and the other end is pressed against the steel balls  105 . It may be understood that the stop component can be achieved in any other proper manners. 
         [0051]    In some of the embodiments and figures above, although the adjusting device is described or shown as including each component mentioned above, it can be understood that these components are not essential to implement the present invention, and the adjusting device according to the present invention can contain fewer or more elements. 
         [0052]    It shall be understood that the example embodiments described herein can be used separately or in any suitable combination thereof. It shall be understood that the foregoing description explains merely aspects of the disclosed embodiments. Various replacements and modifications can be made by the skilled in the art without departing from the aspects of the disclosed embodiments. Accordingly, the aspects of the disclosed embodiments are intended to encompass all such replacement, modification and alteration falling in the range of the appended claims. 
       LIST OF REFERENCES 
       [0000]    
       
         
           
               101  First set screw 
               102  Fourth set screw 
               103  Anti-rotation screw 
               104  Spring 
               105  Steel ball 
               106  Secure screw 
               107  Stop hole 
               108  Bar groove 
               109  Adjusting screw 
               110  Second set screw 
               111  Third set screw 
               112  First nylon rod 
               113  Second nylon rod 
               114  First barrel component 
               115  Second barrel component 
               116  Support arm