Abstract:
A connector structure with a detachable mounting tube comprises a mounting pipe with an inner sliding pipe detachably secured to an end of a connector. The connector structure not only can be provided for insertion of an ordinary screwdriver head to carry out screwing and unscrewing operation. Further, when the mounting tube is detached from the connector, a special tool head with a big head and a short length can also be inserted in the connector, thus overcoming the conventional technique bottleneck of needing two different connectors. Besides, the mounting tube is detachable from the connector, for the sake of simplification, the sliding pipe and the mounting tube are integral with each other.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a connector structure with a detachable mounting tube, and more particularly to a connector structure used on a power tool for insertion of an ordinary screwdriver head or a special tool head. 
   2. Description of the Prior Art 
   FIG. 1, (TW Pat. No. 093205513) shows a conventional connector used on a power tool for insertion of screwdriver head, and the connector comprises a shaft 11 slideably installed in a mounting tube 10. The shaft 11 has a connecting end 111 to be coupled to the power tool, and an inserting hole 112 is formed in another end surface of the shaft 11 for insertion of a screwdriver head 12. A first magnetic member 13 is disposed in the bottom of the inserting hole 112, and a second magnetic member 14 is located at the another end of the mounting tube 10. The screwdriver head 18 can be secured in the inserting hole 112 by the magnetic force of the first magnetic member 13, and the magnetic force of the second magnetic members 14 serves to hold the screw 15 to be rotated by the screwdriver head 18. 
   It is to be noted that the conventional connector structure can be provided for insertion of various types of screwdriver head, and the magnetic force can prevent the screw from falling off during the screwing and unscrewing operation. However, as shown in FIG. 2, for a special tool head 16 with a large head and a short length, it must employ another conventional clamping device 17 since the above-mentioned conventional connector structure is not suitable for this special tool head 16. 
   Therefore, the user has to prepare a clamping device and a connector simultaneously during work, this is not only troublesome but also money wasted. 
   The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
   SUMMARY OF THE INVENTION 
   The primary objective of the present invention is to provide a connector structure with a detachable mounting tube, wherein a mounting tube with an inner sliding pipe is detachably secured to an end of a connector. The connector structure can be provided for insertion of the ordinary screwdriver head by the use of the connector, and is also suitable for insertion of the special tool head when the mounting tube is removed from the connector structure. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a cross sectional and operational view of showing a conventional screwdriver head connector; 
       FIG. 2  is a cross sectional view of showing a conventional clamping device for clamping a tool head; 
       FIG. 3  is an exploded view of a connector with a detachable mounting pipe in accordance with the present invention; 
       FIG. 4  is an assembly view of the connector with a detachable mounting pipe in accordance with the present invention; 
       FIG. 5  is a cross sectional view of the connector with a detachable mounting pipe in accordance with the present invention; 
       FIG. 6  is a cross sectional view of showing the connector with a detachable mounting pipe in accordance with the present invention, wherein the mounting tube is detached from the connector; 
       FIG. 7  is a cross sectional view in accordance with the present invention of showing that a screwdriver head is being inserted in the connector structure; 
       FIG. 8  shows how to take the screwdriver head out of the connector structure; 
       FIG. 9  is a cross sectional illustrative view in accordance with the present invention of showing the screwdriver head inserted in the connector structure is rotating a screw; and 
       FIG. 10  is a cross sectional view in accordance with the present invention of showing that a tool head is being inserted in the connector structure. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   The present invention will be more clear from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
   Referring to  FIGS. 3-6 , a connector structure with a detachable mounting tube in accordance with a preferred embodiment of the present invention is suitable for insertion of both a screwdriver head  501  and a special tool head  502 , and comprises: a connector  20 , a mounting tube  30  detachably disposed at an end of the connector  20 , and a sliding pipe  40  slideably installed in the mounting tube  30 . 
   The connector  20  has a coupling end  21  to be coupled to a power tool and has a connecting end  22 . A plurality of threads  221  is formed in the outer periphery of the connecting end  22 , an inserting hole  23  for insertion of the tool head  502  is formed in the connecting end  22 , and the inserting hole  23  can be hexagonal in cross section, so it is suitable for insertion of a hexagonal tool head  502 . 
   In order that the conventional type screwdriver head  501  with a locking groove  511  or the special tool head  502  can be positioned firmly, and the screwdriver head  501  can be bounced out of the inserting hole  23  when the user wants to take the screwdriver head  501  out of the inserting hole  23 , a chute  24  is formed in the outer periphery of the connector  20  and located correspondingly to the inserting hole  23 . An elastic member  25  is mounted on the outer periphery of the connector  20  in such a manner that an abutting end  251  of the elastic member  25  is horizontally inserted into the chute  24 . And then a sliding sleeve  26  is mounted onto the connector  20  in such a manner that the inner end surface  261  of the sliding sleeve  26  abuts against the abutting end  251 . A tube  27  is mounted on the connector  20  and is located adjacent to the sliding sleeve  26 , and an abutting surface  271  formed at an end of the sliding sleeve  27  abuts against another end of the elastic member  25 . A spring  28  is disposed at the bottom of the inserting hole  23  of the connector  20 . 
   The mounting tube  30  has a connecting end  31 , a plurality of threads  32  for meshing with the threads  221  is formed in the inner surface of the mounting tube  30  and is located at the connecting end  31 , so as to enable the connecting end  31  to be connected to the connecting end  22  of the connector  20 . An annular rib  33  is formed in the inner surface of the mounting tube  30 . 
   The sliding pipe  40  is formed at either end thereof with a flange  411 ,  412 , and is received in the mounting tube  30 , and the two flanges  411 ,  412  are located at both sides of the annular rib  33 . The flange  411  protrudes out of the mounting tube  30 , so that the mounting tube  30  can slide within the tube  27 , and a spring  42  is biased between the flange  411  and the annular rib  33 . A magnetic member  43  with a central hole is disposed in the end of the sliding pipe  40  protruding out of the mounting tube  30 . 
   The connector structure of the present invention can be provided for insertion of the ordinary screwdriver head  501  when equipped with the connector  20 , and is also suitable for insertion of the special tool head  502  when the mounting tube  30  is removed. 
   For a better understanding of the present invention, its operation and function, reference should be made to  FIGS. 3-5  again. After the connector  20 , the mounting tube  30 , and the sliding pipe  40  after assembled together, the present invention can be provided for insertion of the ordinary screwdriver head  501 . In the normal state, the abutting end  251  of the elastic member  25  keeps pushing against the inner end surface  261  of the sliding sleeve  26 , and the sliding sleeve  26  is located at the top end of the connector  20 . At this moment, the elasticity of the elastic member  25  will make the abutting end  251  protrudes out of the chute  25  and partially into the inserting hole  23 . 
   As shown in  FIG. 7 , when inserting the screwdriver head  501  with the locking groove  511  into the inserting hole  23 , the end of the screwdriver head  501  will press against the spring  28 . When the locking groove  511  is aligned to the chute  24 , the abutting end  251  will be engaged with the locking groove  511  of the screwdriver head  501 . At this moment, the end of the screwdriver head  501  is pushed by the spring  28 , meanwhile, the abutting end  251  of the elastic member  25  is engaged in the locking groove  511  to stop the movement of the screwdriver head, thus preventing the screwdriver head  501  from disengaging out of the inserting hole  23 . 
   Referring then to  FIG. 8 , after the screwdriver head  501  is inserted in the inserting hole  23  of the connector  20 , it can be used to do the screwing and unscrewing operation. When the end of the screwdriver head  501  is in contact with the screw, the magnetic member  43  of the sliding pipe  40  will attract the screw, and drive the sliding pipe  40  to move toward the screw, thus preventing the screw from falling off during the screwing and unscrewing operation. 
   Referring to  FIG. 9 , the screwdriver head  501  can be disassembled from the connector structure by pushing the sliding sleeve  26  toward the tube  27 , meanwhile, the inner end surface  261  of the sliding sleeve  26  will push the abutting end  251  out of the chute  24  and the locking groove  511  of the screwdriver head  501 . At this moment, the spring  28  will push the screwdriver head  501  out of the inserting hole  23 . It is to be noted that the sliding pipe  40  is specially provided with the magnetic member  43 , the magnetic force of the magnetic member  43  can prevent the screwdriver head  501  from bouncing excessively out of the inserting hole  23 . in other words, after the abutting end  251  is disengaged from the locking groove  511  of the screwdriver head  501 , the screwdriver head  501  will be disengaged out of the inserting hole  23  but will not move completely out of the sliding pipe  40 , and this design prevents the falling off of the screwdriver head  501 . 
   Referring finally to  FIG. 10 , if the work head to be inserted is the special tool head  502  with a comparatively large head and a short length, the mounting pipe  30  and the sliding pipe  40  are compatible with the tool head  502 . Since the mounting pipe  30  is detachably secured to the connector  20 , the tool head  502  can be inserted directly into the connector  20 . 
   It is to be noted that, as shown in  FIG. 6 , the mounting pipe  30  can be detached from the connector  20 , and the sliding pipe  40  can be integral with the mounting pipe  30 . 
   The connector structure of the present invention can be provided for insertion of the ordinary screwdriver head  501  when equipped with the connector  20 , and is also suitable for insertion of the special tool head  502  when the mounting tube  30  is removed. 
   While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.