Terminal block fastening device having locking handle

1. A terminal block fastening device, for fastening a circuit board ( 10 ) having at least one fastening hole ( 20 ), the terminal block fastening device ( 100 ) comprising:

a body ( 110 ) including a socket ( 124 ) for insertion of the printed circuit board ( 10 ) and two through holes ( 128 ) perpendicular to an insertion direction of the printed circuit board ( 10 ); and

a locking handle ( 200 ) installed in the body ( 110 ), the locking handle ( 200 ) including a force arm ( 230 ), a fastening portion ( 202 ) connected to one end of the force arm ( 230 ), a pivot point element ( 220 ) connected to the other end of the force arm ( 230 ), and a resilient arm ( 210 ) disposed between the fastening portion ( 202 ) and the force arm ( 230 ), wherein the fastening portion ( 202 ) is operatively associated with the resilient arm ( 210 ) to be moved between a locked state (L) and a released state (R).

2. The terminal block fastening device according to claim 1 , wherein when the circuit board ( 10 ) is inserted into the socket ( 124 ) to contact the fastening portion ( 202 ), the fastening portion ( 202 ) is moved from the released state (R) to the locked state (L) to fasten the fastening hole ( 20 ) of the circuit board ( 10 ); and when the force arm ( 230 ) is moved toward the body ( 110 ), the fastening portion ( 202 ) is moved from the locked state (L) to the released state (R).

3. The terminal block fastening device according to claim 1 , wherein the locking handle ( 200 ) further includes a neck ( 204 ) connected between the fastening portion ( 202 ) and the force arm ( 230 ), a guiding hole ( 208 ) formed on the neck ( 204 ), and a head ( 206 ) extending from one end of the neck ( 204 ) toward an opening of the socket ( 124 ).

4. The terminal block fastening device according to claim 3 , wherein the fastening portion ( 202 ) is disposed below the head ( 206 ), and the fastening portion ( 202 ) includes an inclined surface ( 216 ) corresponding to the insertion direction of the printed circuit board ( 10 ).

5. The terminal block fastening device according to claim 3 , wherein one end of the resilient arm ( 210 ) is connected to the neck ( 204 ), the other end of the resilient arm ( 210 ) is a free end ( 212 ), and the free end ( 212 ) is inclined and contacted against a bottom of the body ( 110 ).

6. The terminal block fastening device according to claim 3 , wherein the body ( 110 ) further includes a pillar element ( 130 ) disposed between the two through holes ( 128 ), and the guiding hole ( 208 ) is for insertion of the pillar element ( 130 ), so that the neck ( 204 ) is movable in relation to the pillar element ( 130 ) along the guiding hole ( 208 ).

7. The terminal block fastening device according to claim 3 , wherein two platforms ( 214 ) extend from two ends of the neck ( 204 ) respectively, and the platforms ( 214 ) are disposed corresponding the through holes ( 128 ) respectively to contact the body ( 110 ) and are restricted by the body ( 110 ).

8. The terminal block fastening device according to claim 3 , wherein a thickness of the neck ( 204 ) is less than a width of the force arm ( 230 ).

9. The terminal block fastening device according to claim 1 , wherein a length of the force arm ( 230 ) is greater than a length of the resilient arm ( 210 ), the force arm ( 230 ) has a slight arc shape, a plurality of protruding patterns ( 232 ) are formed on one side of the force arm ( 230 ), and a rib portion ( 234 ) is formed on the other side of the force arm ( 230 ).

10. The terminal block fastening device according to claim 1 , wherein a pivot hole ( 134 ) is formed on the body ( 110 ) to receive the pivot point element ( 220 ).

11. The terminal block fastening device according to claim 10 , wherein the pivot point element ( 220 ) includes a rod portion ( 222 ) connected to the force arm ( 230 ) and a top portion ( 224 ) connected to the rod portion ( 222 ), and the top portion ( 224 ) has a larger size than the rod portion ( 222 ).

12. The terminal block fastening device according to claim 11 , wherein the top portion ( 224 ) has a round shape cross-section, and the pivot hole ( 134 ) is a round hole corresponding to the shape of the top portion ( 224 ).

13. The terminal block fastening device according to claim 1 , further comprising a plate ( 150 ) for covering and positioning the locking handle ( 200 ).

14. The terminal block fastening device according to claim 13 , wherein a plurality of assembly pillars ( 132 ) are disposed on a side surface of the body ( 110 ) and are arranged parallel to a pillar element ( 130 ) disposed between the two through holes ( 128 ), and the plate ( 150 ) includes a plurality of assembly holes ( 152 ) corresponding to the assembly pillars ( 132 ).

15. The terminal block fastening device according to claim 1 , wherein the body ( 110 ) consists of a plurality of bases ( 112 ) stacked side by side, each of the bases ( 112 ) includes a wiring chamber ( 116 ) receiving a disc spring ( 114 ), a conductive terminal ( 118 ) inserted in the socket ( 124 ), and a pressing block ( 120 ) movably contacting the disc spring ( 114 ).