Patent Publication Number: US-8979560-B2

Title: Lever type connector

Description:
TECHNICAL FIELD 
     The present invention relates to a lever type connector which is so adapted as to be engaged with a mating connector, by rotating a lever. 
     BACKGROUND ART 
     As a lever type connector which is so adapted as to be engaged with a mating connector by rotating a lever, there has been conventionally proposed the lever type connector as disclosed, for example, in Japanese Patent Publication No. JP-A-2003-272755. This lever type connector has such a structure that by rotating the lever, the mating connector is introduced from a temporarily engaged position to a normally engaged position in a connector housing. In this manner, an engaging work can be easily performed, and reliability of the engaging work can be enhanced. 
       FIG. 9  is a view showing the structure of the lever type connector disclosed in JP-A-2003-272755. As shown in  FIG. 9 , the lever type connector  100  is substantially composed of a male connector  120  which can be engaged with and disengaged from a female connector (not shown), a lever  130  which is rotatably mounted on the male connector  120 , and a wire cover  140  which has a substantially dome-like shape and guides out wires to the exterior. 
     The male connector  120  includes a connector housing  122  provided with a plurality of terminal containing rooms  121  for containing terminals (not shown) at terminal ends of the wires, and a rotation axis pin  123  for rotatably mounting the lever  130  on the connector housing  122 . 
     The lever  130  is composed of a pair of arm parts  131 , and a connecting part  138  for interconnecting these arm parts  131 . The arm parts  131  is provided with a rotation axis hole  132  into which the rotation axis pin  123  of the connector housing  122  is inserted, a cam groove  133  for varying a distance from the rotation axis hole  132  along a circumferential direction of the arm parts  131 , and an operating part  134  for operating the lever  130  to rotate. The operating part  134  has a locking part  135  for locking the lever  130  which has been rotated. 
     The wire cover  140  is composed of a cover body  141  which contains the wires which have been guided out from the connector housing  122  toward the wire cover  140 , and guides out the wires to the exterior as a bundle of the wires, and a lock arm  142  which is provided on a top of the wire cover  140  in the substantially dome-like shape. 
     Then, an engaging work of the lever type connector  100  having the above described structure will be described. As a first step, the rotation axis pin  123  of the connector housing  122  is passed through the rotation axis hole  132  of the lever  130 , thereby to mount the lever  130  on the connector housing  122  so as to rotate. 
     Thereafter, the terminals (not shown) at the terminal ends of the wires are inserted into the terminal containing rooms  121 , and the wire cover  140  is assembled in a manner of covering the terminal containing rooms  121  of the connector housing  122 . Then, the female connector (not shown) is inserted into the connector housing  122  of the male connector  120 . A cam pin (not shown) of the female connector which has been inserted into the connector housing  122  is engaged with the cam groove  133  of the lever  130 , thereby to set the female connector in a temporarily engaged position with respect to the connector housing  122 . 
     Then, the lever  130  is rotated, and with this rotation of the lever  130 , the cam pin (not shown) is pressed with a pressure from the cam groove  133  thereby to gradually shift the terminals of the female connector (not shown) to the normally engaged position in the connector housing  122 . 
     When the lever  130  has arrived at a determined rotary position, the locking part  135  overrides the lock arm  142  which is provided on the lock cover  140 , to be engaged with the lock arm  142 . In this manner, the female connector (not shown) is engaged with the connector housing  122  in the normally engaged position. 
     Patent Document JP-A-2003-272755 is discussed above. 
     SUMMARY OF THE INVENTION 
     Technical Problem 
     However, in the conventional lever type connector  100  as described above, the lever  130  is mounted on the connector housing  122  in such a manner that a part of the lever  130  protrudes from the terminal containing rooms  121  of the connector housing  122  to a wire extending side. Accordingly, when the terminals at the terminal ends of the wires are clamped with fingers and inserted into the terminal containing rooms  121 , the fingers may interfere with the lever  130 . As the results, there occurs such a problem that it is difficult to insert the terminals in a normally inserted position, incurring deterioration of workability. 
     In view of the above, the invention has been made to solve the problem in the prior art as described above, and it is an object of the invention to provide a lever type connector in which workability in inserting terminals is enhanced. 
     Solution to Problem 
     In order to attain the above described object, there is provided according to the invention, as first aspect of the invention, a lever type connector comprising a connector housing for containing terminals at terminal ends of wires, and a lever which is rotatably mounted on the connector housing, and rotated at a wire extending side of the connector housing thereby to move a mating connector to be engaged with the connector housing up to a normally engaged position, characterized in that the lever includes a pair of arm parts, and a connecting part for interconnecting respective base end parts of the arm parts, a recess part for enlarging a distance between the base end parts is provided on at least one of inner walls of the base end parts of the arm parts which are opposed to each other, the connector housing is provided with a temporary lock projection for locking the lever in a temporarily locked position, on an outer peripheral face thereof, and the recess part is provided with a temporary lock engaging projection to be engaged with the temporary lock projection. 
     A lever type connector according to second aspect of the invention is the lever type connector as the first aspect of the invention, and characterized in that the recess part is formed in a shape of a shallow groove by reducing a thickness of the arm part, and the temporary lock engaging projection is formed having a height from a bottom of the recess part in the shape of a shallow groove to the thickness of the arm part. 
     A lever type connector according to third aspect of the invention is the lever type connector as the first or second aspect of the invention, and characterized in that the recess part is open to one side part of the lever, and the temporary lock engaging projection is formed in the other side part of the lever. 
     Advantageous Effect of Invention 
     According to the lever type connector according to the first aspect of the invention, the recess part for enlarging the distance between the base end parts of the arm parts is provided on at least one of the inner walls of the arm parts. As the results, the hand will not interfere with the lever, when the terminals at the terminal ends of the wires are inserted into the connector housing, and therefore, the terminals can be easily inserted into the normally inserted position. 
     Moreover, because the temporary lock projection is engaged with the temporary lock engaging projection which is formed in the recess part, the terminals at the terminal ends of the wires can be inserted, without rotating the lever. As the results, it is possible to provide the lever type connector in which workability in inserting the terminals is enhanced. 
     According to the lever type connector according to the second aspect of the invention, because the recess part is formed in the shape of a shallow groove by reducing the thickness of the arm part, it is possible to enlarge the distance between the base end parts, without making the thickness of the lever type connector larger. 
     Further, because the temporary lock engaging projection is formed having the height from the bottom of the recess part in the shape of a shallow groove to the thickness of the arm part, it is possible to hold the lever in the temporarily locked position, and to insert the terminals at the terminal ends of the wires, without making the thickness of the lever larger. 
     According to the lever type connector according to the third aspect of the invention, because the recess part is open to the one side part of the lever, the hand will not interfere with the lever, when the terminals at the terminal ends of the wires are inserted. Therefore, the terminals can be easily inserted into the normally inserted position, and the workability is enhanced. Moreover, because the temporary lock engaging projection is formed at the other side of the lever, there is no necessity of providing a projection separately on the lever. As the results, the number of constituent components is reduced, and reduction of the production cost can be achieved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a lever type connector in an embodiment according to the invention, showing a state before a connector housing and a lever are assembled together. 
         FIG. 2  is a perspective view of the lever type connector in the embodiment according to the invention, showing a state after the connector housing and the lever have been assembled together. 
         FIGS. 3(   a ) and ( b ) show plan views of the connector housing and the lever in the lever type connector in the embodiment according to the invention. 
         FIG. 4  is a plan view of the lever type connector in the embodiment according to the invention, showing a state after the connector housing and the lever have been assembled together. 
         FIG. 5  is a plan view of the lever type connector in the embodiment according to the invention, showing a temporarily locked state of the lever. 
         FIG. 6(   a ) shows a sectional view of the lever type connector in the embodiment according to the invention, taken along a line A-A in  FIG. 4  and  FIG. 6(   b ) shows an enlarged view of a part VI(b) indicated in  FIG. 6(   a ). 
         FIG. 7(   a ) shows a sectional view of the lever type connector in the embodiment according to the invention, taken along a line B-B in  FIG. 5  and  FIG. 7(   b ) shows an enlarged view of a part VII (b) indicated in  FIG. 7(   a ). 
         FIG. 8  is a sectional view of the lever type connector in the embodiment according to the invention, taken along a line C-C in  FIG. 5 . 
         FIG. 9  is a perspective view of a lever type connector in a conventional case. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Now, an embodiment of the invention will be described referring to the drawings.  FIG. 1  is a perspective view of a lever type connector in an embodiment according to the invention, showing a state before a connector housing and a lever are assembled together.  FIG. 2  is a perspective view of the lever type connector in the embodiment according to the invention, showing a state after the connector housing and the lever have been assembled together.  FIG. 3  is a plan view of the connector housing and the lever in the lever type connector in the embodiment according to the invention. 
     At the beginning, a structure of the lever type connector in the embodiment according to the invention will be described referring to  FIGS. 1 to 3 . The lever type connector in the embodiment according to the invention is so constructed that after the lever has been locked in a temporarily locked position, and terminals at terminal ends of wires have been inserted into a connector housing, the lever is rotated thereby to engage the connector housing with a mating connector in a normally engaged position. 
     As shown in  FIGS. 1 to 3 , a lever type connector  1  is substantially composed of a male connector  20  which can be engaged with a female connector (not shown), which is a mating connector, and can be disengaged from the female connector, and a lever  30  which is rotatably mounted on the male connector  20  and can be rotated at a wire extending side (See an arrow mark X in  FIG. 1 ). 
     As shown in  FIGS. 1 and 2 , the male connector  20  has a connector housing  22  provided with terminal containing rooms  21  for containing a plurality of terminals  61  at terminal ends of the wires. As shown in  FIGS. 1 to 3 , this connector housing  22  is provided with rotation axis pins  23  for mounting the lever  30  on the connector housing  22  so as to rotate, and temporary lock projections  44  for locking the lever  30  in a temporarily locked position (See  FIG. 5  which will be described below), on an outer peripheral face (an upper outer peripheral face  41  and a lower outer peripheral face  42 ) of the connector housing  22 . 
     As shown in  FIGS. 1 to 3 , the temporary lock projections  44  have such a shape as protruding toward inner walls  50   a ,  50   b  of arm parts  31  which will be described below, when the lever  30  has been mounted on the connector housing  22 . Then, when the lever  30  is rotated at the wire extending side (See the arrow mark X in  FIG. 1 ) and has moved to the temporarily locked position (See  FIG. 5  which will be described below), the temporary lock projections  44  are engaged with temporary lock engaging projections  54  which will be described below. 
     In this manner, the temporary lock projections  44  for locking the lever  30  in the temporarily locked position (See  FIG. 5 ) are provided on the outer peripheral face (the upper outer peripheral face  41  and the lower outer peripheral face  42 ) of the connector housing  22 . As the results, it is possible to hold the lever  30  in the temporarily locked position. 
     Moreover, because the temporary lock projections  44  are engaged with the temporary lock engaging projections  54  which are formed in recess parts  53 , it is possible to insert the terminals  61  at the terminal ends of the wires, without rotating the lever  30 . As the results, workability in inserting the terminals  61  can be enhanced. 
     As shown in  FIG. 1 , the lever  30  is substantially composed of a pair of the arm parts  31  ( 31   a ,  31   b ), an operating part  34  for operating the lever  30  to rotate, and a connecting part  38  for interconnecting the arm parts  31  ( 31   a ,  31   b ). 
     As shown in  FIG. 1 , base end parts  51  ( 51   a ,  51   b ) of the arm parts  31  are provided with the recess parts  53  for enlarging a distance Y between the base end parts  51   a  and  51   b  (a distance between a pair of the base end parts  51 ), and the temporary lock engaging projections  54  to be engaged with the temporary lock projections  44  provided on the connector housing  22 , on inner walls  50   a ,  50   b  of the base end parts  51  opposed to each other. 
     In this manner, the recess parts  53  for enlarging the distance Y between the base end parts  51   a  and  51   b  of the arm parts  31  are provided on the inner walls  50   a ,  50   b  of the arm parts  31 , and therefore, a hand will not interfere with the lever  30 , when the terminals  61  at the terminal ends of the wires are clamped with fingers and inserted into the connector housing  22 . 
     Moreover, because the distance Y between the base end parts  51   a  and  51   b  is enlarged by the recess parts  53 , the terminals  61  at the terminal ends of the wires can be easily inserted into a normally inserted position, when the terminals  61  are inserted into the connector housing  22 . As the results, it is possible to provide the lever type connector  1  in which the workability in inserting the terminals  61  is enhanced. 
     Each of the recess parts  53  is formed in a shape of a shallow groove by reducing a thickness of the arm part  31 , as shown in  FIG. 1 , and is open toward one of side parts  35   a  of the lever  30 . In other words, the recess part  53  has a long length shape extending from the other side part  35   b  to the one side part  35   a  of the lever  30  in a plan view, and the recess part  53  is formed thinner in thickness than the arm part  31 , in a side view. 
     Because the recess part  53  is formed in the shape of a shallow groove by reducing the thickness of the arm part  31 , as described above, the thickness of the lever type connector  1  will not be increased. Therefore, the lever type connector  1  can be made compact, while the distance Y between the base end parts  51   a  and  51   b  is enlarged. 
     Moreover, because the recess part  53  is open toward the one side part  35   a  of the lever  30 , the hand will not interfere with the lever  30 , when the terminals  61  at the terminal ends of the wires are clamped with the fingers and inserted. In short, the recess part  53  is formed in a wide area at the side where the terminals  61  are inserted (the one side part  35   a ), the hand will not interfere with the lever  30 , when the terminals  61  are clamped with the fingers and brought close to the terminal containing rooms  21 . 
     Further, because the hand will not interfere with the lever  30 , the terminals  61  can be easily inserted into the terminal containing rooms  21  near the inner walls  50  of the arm part  31 . As the results, the terminals  61  can be easily inserted into the normally inserted position, and the workability is enhanced. 
     Still further, because the temporary lock engaging projection  54  is formed in the other side part  35   b , there is no necessity of providing a projection separately on the lever  30 . As the results, the number of constituent components is reduced, and reduction of production cost can be achieved. 
     As shown in  FIG. 1 , the temporary lock engaging projection  54  is formed having a height from a bottom of the recess part  53  in the shape of a shallow groove to the thickness of the arm part  31 . In short, the temporary lock engaging projection  54  is inclined at a determined angle with respect to the bottom of the recess part  53 . 
     As described above, the temporary lock engaging projection  54  is formed having the height from the bottom of the recess part  53  in the shape of a shallow groove to the thickness of the arm part  31 . Therefore, it is possible to insert the terminals  61  at the terminal ends of the wires by holding the lever  30  in the temporarily locked position (See  FIG. 5 ), without making the thickness of the lever type connector  1  larger. 
     As shown in  FIG. 1 , each of the arm parts  31  is provided with a cam groove forming part  52  in an end part thereof at an opposite side to the connecting part  38  interposing the base end part  51 . The cam groove forming part  52  is provided with a rotation axis hole  32  into which the rotation axis pin  23  of the connector housing  22  is inserted, and a cam groove  33  to be engaged with a cam pin (not shown) of the female connector. 
     In this manner, the cam groove forming parts  52  are formed in the end parts at the opposite side to the connecting part  38  interposing the base end parts  51   a ,  51   b . Therefore, when the recess parts  53  and the temporary lock engaging projections  54  are engaged with the mating connector (not shown), the workability in inserting the terminals  61  at the terminal ends of the wires can be enhanced, without badly affecting an engaging work. 
     Then, referring to  FIGS. 4 to 8 , the engaging work of the lever type connector  1  in the embodiment according to the invention will be described.  FIG. 4  is a plan view of the lever type connector in the embodiment according to the invention, showing a state after the connector housing and the lever have been assembled together.  FIG. 5  is a plan view of the lever type connector in the embodiment according to the invention, showing a temporarily locked state of the lever.  FIG. 6(   a ) shows a sectional view of the lever type connector in the embodiment according to the invention, taken along a line A-A in  FIG. 4  and  FIG. 6(   b ) shows an enlarged view of a part VI (b) indicated in  FIG. 6(   a ).  FIG. 7(   a ) shows a sectional view of the lever type connector in the embodiment according to the invention, taken along a line B-B in  FIG. 5  and  FIG. 7(   b ) shows an enlarged view of a part VII (b) indicated in  FIG. 7(   a ).  FIG. 8  is a sectional view of the lever type connector in the embodiment according to the invention, taken along a line C-C in  FIG. 5 . 
     As a first step, as shown in  FIG. 4 , the rotation axis pin  35  of the connector housing  22  is passed through the rotation axis hole  32  of the lever  30  thereby to mount the lever  30  on the connector housing  22  so as to rotate. 
     When the lever  30  is mounted on the connector housing  22 , as shown in  FIG. 6(   a ), a projected part  44   a  of the temporary lock projection  44  of the connector housing  22  is positioned between the recess part  53  of the arm part  31  (between the one side part  35   a  and the temporary lock engaging projection  54 ), as shown in  FIG. 6(   b ). 
     Specifically, when the lever  30  is mounted on the connector housing  22 , the projected part  44   a  of the temporary lock projection  44  which is shown in  FIG. 6(   b ) is butted against the inclined part  54   a  of the temporary lock engaging projection  54 , and thus, the lever  30  is restrained from rotating in a direction of an arrow mark A in  FIG. 4 . 
     Then, as shown in  FIG. 5 , the operating part  34  of the lever  30  is operated to rotate the lever  30  in the direction of the arrow mark A in  FIG. 4 , thereby to lock the lever  30  in the temporarily locked position. Herein, the temporarily locked position means that the operating part  34  of the lever  30  is positioned near the terminal containing rooms  21  (See  FIG. 1 ) into which the terminals  61  are to be inserted. 
     Specifically, when the lever  30  is rotated in the direction of the arrow mark A in  FIG. 4 , the projected part  44   a  of the temporary lock projection  44 , as shown in  FIG. 7(   b ), is butted against the inclined part  54   a  of the temporary lock engaging projection  54 . As the lever  30  is further rotated, the projected part  44   a  overrides an inclined head part  54   b  of the temporary lock engaging projection  54 . When the projected part  44   a  has overridden the inclined head part  54   b  of the temporary lock engaging projection  54 , a temporarily locking flat part  44   b  of the temporary lock projection  44  is positioned on the substantially same plane as a flat part  54   c  of the temporary lock engaging part  54 , as shown in  FIG. 7(   b ), and the lever  30  is locked in the temporarily locked position. 
     In this manner, when the projected part  44   a  of the temporary lock projection  44  has overridden the inclined head part  54   b  of the temporary lock engaging projection  54 , the lever  30  is locked in the temporarily locked position. Therefore, interference between the temporary lock projection  44  and the lever  30  is depressed to the least, while the lever  30  is shifted to the temporarily locked position (See  FIGS. 4 and 5 ), and hence, the lever  30  can be easily mounted on the connector housing  22 . 
     The projected part  44   a  of the temporary lock projection  44  may be formed of an elastic member which is flexibly deformed toward the terminal containing rooms  21  (See  FIG. 1 ), so that the projected part  44   a  can override the inclined head part  54   b  of the temporary lock engaging projection  54 . Moreover, the inclined head part  54   b  of the temporary lock engaging projection  54  may be also formed of an elastic member which is flexibly deformed toward the recess part  53 , so that the projected part  44   a  can override the inclined head part  54   b.    
     After the lever  30  has been rotated to be locked in the temporarily locked position, the terminals  61  at the terminal ends of the wires are inserted into the terminal containing rooms  21 , as shown in  FIG. 8 . When the terminals  61  at the terminal ends of the wires are inserted, a distance Z between the arm part  31   a  and the arm part  31   b  is larger than a distance between the conventional arm parts, because the recess parts  53  in the shape of a shallow groove are formed. Therefore, the inserting work of the terminals  61  at the terminal ends of the wires can be easily performed. 
     Moreover, because the recess parts  53  in the shape of a shallow groove are formed, the fingers enter up to a position near the terminal containing rooms  21 , when the terminals  61  at the terminal ends of the wires are inserted into the terminal containing rooms  21 , and a distance from the fingers clamping the terminal ends  61  to the terminal containing rooms  21  is reduced. As the results, the inserting work of the terminals  61  at the terminal ends of the wires can be easily performed. Further, it is possible to prevent a break or so of the wire which occurs due to a long distance between the fingers clamping the terminal ends  61  and the terminal containing rooms  21 , when the terminals  61  are inserted into the terminal containing rooms  21 . 
     After the terminals  61  at the terminal ends of the wires have been inserted into the terminal containing rooms  21 , a wire cover (not shown) is assembled in a manner of covering over the terminal containing rooms  21  of the connector housing  22 , and the female connector (not shown) is inserted into the connector housing  22  of the male connector  20  from a direction of an arrow mark B in  FIG. 1 . A cam pin (not shown) of the female connector which is inserted into the connector housing  22  is engaged with a cam groove  33  of the lever  30  thereby to set the female connector in a temporarily engaged position with respect to the connector housing  22 . 
     Then, the lever  30  which stays in the temporarily locked position is further rotated in the direction of the arrow mark A in  FIG. 4 . The cam pin (not shown) is pressed with a pressure from the cam groove  33  with this rotation of the lever  30 , and the terminals (not shown) of the female connector are gradually shifted to a normally engaged position of the connector housing  22 . In this manner, the female connector and the connector housing  22  are normally engaged with each other. 
     As described above, the lever type connector  1  in the embodiment according to the invention includes the connector housing  22  for containing the terminals  61  at the terminal ends of the wires, and the lever  30  which is rotatably mounted on the connector housing  22 , and rotated at the wire extending side (the arrow mark X in  FIG. 1 ) of the connector housing  22  thereby to move a mating connector to be engaged with the connector housing  22  up to the normally engaged position. The lever  30  includes a pair of the arm parts  31  ( 31   a ,  31   b ), and the connecting part  38  for interconnecting the respective base end parts  51  ( 51   a ,  51   b ) of the arm parts  31 . The recess part  53  for enlarging a distance between the base end parts  51  is provided on at least one of the inner walls  50  ( 50   a ,  50   b ) of the base end parts  51  of the arm parts  31  which are opposed to each other. 
     Moreover, the connector housing  22  is provided with the temporary lock projection  44  for locking the lever  30  in the temporarily locked position, on an outer peripheral face thereof (the upper outer peripheral face  41 , the lower outer peripheral face  42 ), and the temporary lock engaging projection  54  to be engaged with the temporary lock projection  44  is formed in the recess part  53 . 
     Further, in the lever type connector  1  in the embodiment according to the invention, the recess part  53  is formed in the shape of a shallow groove by reducing the thickness of the arm part  31 , and the temporary lock engaging projection  54  is formed having the height from the bottom of the recess part  53  in the shape of a shallow groove to the thickness of the arm part  31 . 
     Moreover, the lever  30  is provided with the cam groove forming part  52  in which the cam groove  33  to be engaged with the cam pin of the mating connector is formed, at the opposite end part to the connecting part  38  interposing the base end part  51 . 
     Further, in the lever type connector  1  in the embodiment according to the invention, the recess part  53  is open to the one side part  35   a  of the lever  30 , and the temporary lock engaging projection  54  is formed in the other side part  35   b.    
     According to the lever type connector  1  in the embodiment according to the invention, the recess part  53  for enlarging the distance Y between the base end parts  51   a ,  51   b  of the arm parts  31  is provided on the inner wall  50   a  or  50   b  of the arm parts  31 . As the results, the hand will not interfere with the lever  30 , when the terminals  61  at the terminal ends of the wires are inserted into the connector housing  22 . 
     Moreover, because the distance Y between the base end parts  51   a ,  51   b  is enlarged by the recess part  53 , the terminals  61  can be easily inserted into the normally inserted position, when the terminals  61  at the terminal ends of the wires are inserted into the connector housing  22 . Therefore, it is possible to provide the lever type connector  1  in which the workability in inserting the terminals  61  is enhanced. 
     Moreover, because the connector housing  22  is provided with the temporary lock projection  44  for locking the lever  30  in the temporarily locked position (See  FIG. 5 ), on an outer peripheral face thereof (the upper outer peripheral face  41 , the lower outer peripheral face  42 ), it is possible to hold the lever  30  in the temporarily locked position. 
     Further, the temporary lock projection  44  is engaged with the temporary lock engaging projection  54  which is formed in the recess part  53 . Therefore, it is possible to insert the terminals  61  at the terminal ends of the wires, without rotating the lever  30 . 
     Moreover, according to the lever type connector  1  of the invention, because the recess part  53  is formed in the shape of a shallow groove by reducing the thickness of the arm part  31 , it is possible to enlarge the distance Y between the base end part  51   a  and the base end part  51   b.    
     Further, because the temporary lock engaging projection  54  is formed having the height from the bottom of the recess part  53  in the shape of a shallow groove to the thickness of the arm part  31 , it is possible to hold the lever  30  in the temporarily locked position (See  FIG. 5 ), and to insert the terminals  61  at the terminal ends of the wires, without making the thickness of the lever  30  larger. 
     Moreover, the cam groove forming part  52  is formed at the opposite end part to the connecting part  38  interposing the base end part  51   a ,  51   b . Therefore, when the recess part  53  and the temporary lock engaging projection  54  are engaged with the mating connector (not shown), the workability in inserting the terminals  61  at the terminal ends of the wires can be enhanced, without badly affecting the engaging work. 
     Further, according to the lever type connector  1  of the invention, because the recess part  53  is open to the one side part  35   a  of the lever  1 , the hand will not interfere with the lever  30 , when the terminals  61  at the terminal ends of the wires are inserted. Therefore, the terminals  61  can be easily inserted into the normally inserted position, and hence, the workability is enhanced. Moreover, because the temporary lock engaging projection  54  is formed in the other side part  35   b  of the lever  30 , there is no necessity of providing a projection separately on the lever  30 . As the results, the number of constituent components is reduced, and reduction of the production cost can be achieved. 
     Although the lever type connector according to the invention has been heretofore described referring to the illustrated embodiment, the invention is not limited to the embodiment, but structures of the respective parts can be substituted with desired structures having the substantially same functions. 
     For example, in the above described embodiment, a case where the recess parts  53  are provided on both the inner wall  50   a  and the inner wall  50   b  of the base end parts  51  has been described. However, the recess part  53  may be provided on either one of the inner wall  50   a  and the inner wall  50   b.    
     Moreover, in the above described embodiment, a case where the recess part  53  has a long length shape from the other side part  35   b  of the lever  30  to the one side part  35   a  has been described. However, a shape of the recess part  53  can be appropriately modified, provided that it has such a shape as enlarging the distance Y between the base end part  51   a  and the base end part  51   b.    
     The present application is based on Japanese Patent Application No. 2010-156802 filed on Jul. 9, 2010, the entire contents of which are incorporated herein by reference. 
     Industrial Applicability 
     This invention is extremely useful in enhancing the workability, on occasion of inserting the terminals into the lever type connector which is so adapted as to be engaged with a mating connector, by rotating a lever. 
     REFERENCE SIGNS LIST 
     
         
           1  Lever type connector 
           20  Male connector 
           21  Terminal containing room 
           22  Connector housing 
           23  Rotation axis pin 
           30  Lever 
           31  Arm part 
           32  Rotation axis hole 
           33  Cam groove 
           34  Operating part 
           35   a  One side part 
           35   b  Other side part 
           38  Connecting part 
           41  Upper outer peripheral face 
           42  Lower outer peripheral face 
           44  Temporary lock projection 
           44   a  Projected part 
           44   b  Temporarily locking flat part 
           50  Inner wall 
           51  Base end part 
           52  Cam groove forming part 
           53  Recess part 
           54  Temporary lock engaging projection 
           54   a  Inclined part 
           54   b  Inclined head part 
           54   c  Temporary lock engaging flat part 
           61  Terminal at terminal end of wire