Side-push type composite putty knife

Abstract

A side-push type composite putty knife which comprises a handle and a blade with a rear end of the blade inserted into a blade receiving slot at a front end of the handle. The rear end of the blade has a blade tang which is provided with a fixing notch on a side thereof. A lateral gliding slot which is in communication with the blade receiving slot is disposed at the front end of the handle inside its casing. A latch and a reset spring pressing against a first end of the latch are disposed inside the lateral gliding slot. A pressing part is formed by a second end of the latch which extends outwardly from a side of the casing at the front end of the handle. A pin is disposed at the first end of the latch which presses against the reset spring. When the blade tang is inserted into the blade receiving slot at the front end of the handle, the pin engages with the fixing notch of the blade tang. The engagement between the latch on the handle and the fixing notch on the blade allows the handle and the blade of the present invention to be removably assembled, and therefore fulfill the object of replacing blades of different specifications on the same handle. Cost of use will be lower accordingly and carrying the knives becomes more convenient.

1 . A side-push type composite putty knife which comprises a handle ( 1 ) and a blade ( 2 ) with a rear end of the blade ( 2 ) inserted into a blade receiving slot ( 11 ) at a front end of the handle ( 1 ), characterized in that the rear end of the blade ( 2 ) has a blade tang ( 21 ) which is provided with a fixing notch ( 22 ) on a side thereof; a lateral gliding slot ( 11 ) which is in communication with the blade receiving slot ( 11 ) is disposed at the front end of the handle ( 1 ) inside its casing; a latch ( 4 ) and a reset spring ( 5 ) pressing against a first end of the latch ( 4 ) are disposed inside the lateral gliding slot ( 3 ); a pressing part ( 41 ) is formed by a second end of the latch ( 4 ) which extends outwardly from a side of the casing at the front end of the handle; a pin ( 42 ) is disposed at the first end of the latch ( 4 ) which presses against the reset spring ( 5 ); when the blade tang ( 21 ) is inserted into the blade receiving slot ( 11 ) at the front end of the handle, the pin ( 42 ) engages with the fixing notch ( 22 ) of the blade tang ( 21 ). 
     
     
         2 . The side-push type composite putty knife as in  claim 1 , characterized in that a blocking step ( 31 ) is disposed inside the gliding slot ( 3 ) to prevent the latch ( 4 ) from slipping off, and a protrusion corresponding to the blocking step ( 31 ) is disposed on the latch ( 4 ). 
     
     
         3 . The side-push type composite putty knife as in  claim 1 , characterized in that the latch ( 4 ) is disposed at a lower side of the blade receiving slot ( 11 ), and the pin ( 42 ) is formed by protruding upwardly from the first end of the latch ( 4 ) that presses against the reset spring ( 5 ). 
     
     
         4 . The side-push type composite putty knife as in  claim 1 , characterized in that a latch cover ( 6 ) is disposed on the pressing part ( 41 ) of the latch ( 4 ). 
     
     
         5 . The side-push type composite putty knife as in  claim 1 , characterized in that the handle is formed by a metal handle member ( 12 ), a plastic handle member ( 13 ) and a soft leather handle member ( 14 ) disposed from inside to outside, with the blade tang ( 21 ) inserted into the metal handle member ( 12 ).