fig1 is a plan view of a connector according to the present invention , fig2 is a rear view , and fig3 is a side cross - sectional view , showing the condition of use . the connector 1 comprises a plurality of terminal pins 2 , and a connector housing 3 of a resin having these terminal pins integrally mounted thereon . as shown in fig4 the terminal pin 2 includes a linear base portion 5 having a pointed front end , and a grip portion 7 formed integrally on a rear end portion of the base portion 5 . that portion of the grip portion 7 formed integrally with and extends rearwardly along one side of the rear end portion of the base portion 5 is bent into a generally u - shape at a position above the base portion 5 , as viewed from the side of this grip portion , and this bent portion is defined by a lower structural portion 9 , an upstanding portion 10 and an upper structural portion 11 . the upper structural portion 11 and the lower structural portion 9 approach each other progressively toward their rear ends , and their rear ends are spaced from each other in a vertical direction . the connector housing 3 is open at its one longitudinal side , and insertion holes 15 for respectively passing the terminal pins 2 therethrough are formed through a vertical wall 13 at the other longitudinal side opposed to this opening 12 , and are juxtaposed in the longitudinal direction . vertically - extending protuberances 16 are formed on the outer surface of the vertical wall 13 , and a protuberance 16 is formed between any two adjacent insertion holes 15 . the pointed front end of the base portion 5 of each terminal pin 2 is passed from behind through the corresponding insertion hole 15 , so that the terminal pin is attached to the connector housing 3 in a press - fitted manner , thereby constituting the connector 1 . the terminal pin 2 is press - fitted relative to the connector housing 3 until the front surface of the upstanding portion 10 of the grip portion 7 of the terminal pin 2 abuts against the corresponding projection 16 . with this construction , the terminal pins 2 are inserted relative to the connector housing 3 with the same dimension , and the front end of the base portion 5 is correctly directed forwardly . for effecting the press - fitting operation , a pushing force is applied to the rear end 5a of the base portion 5 of the terminal pin 2 , and therefore a linear force acts on the base portion 5 , so that the press - fitting operation is carried out smoothly . if the grip portion 7 is provided on the rear end 5a of the base portion 5 , the rear end 5a can not be pushed , and if this is done , there is a possibility that the grip portion 7 is deformed . as shown in fig3 and 5 , the connector 1 of the above construction is attached to a printing - purpose circuit board 20 in such a manner that the grip portion 7 of each terminal pin 2 grips an edge portion of the printing - purpose circuit board 20 . for effecting this attachment , the rear ends of the upper and lower horizontal portions 11 and 9 of the grip portion 7 are urged away from each other in an upward - downward direction by the edge portion of the circuit board 20 , and the edge portion of the circuit board 20 is received deep in the grip portion 7 , and in this condition contact portions 22 and 23 of the upper and lower horizontal portions 11 and 9 are resiliently contacted with the upper and lower surfaces of the circuit board 20 , respectively . with this arrangement , the connector 1 is attached to the circuit board 20 in a stable manner , and also the contact portion 22 of the upper horizontal portion 11 is resiliently contacted with a connection terminal 34 formed on the surface of the circuit board 20 , thereby forming an electrical contact . the above attachment is carried out by holding the connector housing 3 with the hand , and all the terminal pins 2 can be connected respectively to the predetermined connection terminals 34 of the circuit board 20 at one time . at this time , the front surface of the upstanding portion 10 of the grip portion 7 of the terminal pin 2 abuts against the corresponding protuberance 16 on the rear surface of the connector housing 3 , and therefore a pushing force from the connector housing 3 is applied directly to the grip portions 7 of the terminal pins 2 , so that the edge portion of the circuit board 20 is smoothly inserted into the grip portions 7 . in the printing - purpose circuit board 20 , a plurality of heating resistors 32 serving as printing elements are linearly formed on the surface of a rectangular board of ceramics , and are disposed adjacent to one side edge of the board . a plurality of ics 33 for driving the heating resistors 32 per a predetermined number of dots are mounted in a row on the board , and are disposed adjacent to the other side edge of the board . the connection terminals 34 ( to be connected to an external control circuit board ) to which the terminal pins 2 are connected are formed on each of the opposite end portions of the board at the other side thereof . conductor pattern lines 35 are suitably formed between the connection terminals 34 and the ics 33 , between the connection terminals 34 and the heating resistor 32 , and between the ics 33 and the heating resistor 32 . the circuit board 20 is mounted on a support plate ( not shown ) having a heat radiating function , and a thermal head is constituted by the circuit board 20 and this support plate . the external control circuit board is electrically connected to this thermal head to thereby constitute a printing device . the connector 1 is attached to the circuit board 20 as described above , and a connector housing 41 attached to a front end of a wire assembly 40 is fitted in the connector housing 3 , as shown in fig3 and 6 . by doing so , an electrical connection between the circuit board 20 and the external control circuit board is formed easily and firmly . in fig3 a connection metal member 43 is clamped to a conductor 44 of a covered wire of the wire assembly 40 , and is received in the connector housing 41 . when the connector housing 41 is fitted in the connector housing 3 , the terminal pins 2 of the connector 1 enter the connector housing 41 , and are contacted with the corresponding connection metal members 43 , respectively . as described above , in the present invention , the connector is attached to the circuit board , so that this circuit board can be connected to the mating connecting member through the connector . therefore , the electrical connection of the circuit board can be achieved without the use of soldering . the grip portions of the terminal pins can be attached to the predetermined portion of the circuit board at one time by holding the connector with the hand . this is convenient . furthermore , the connector housing is disposed close to the grip portions , and with this construction when the connector is to be attached to the circuit board , the pushing force is applied uniformly to all the grip portions from the connector housing , and therefore this attachment can be carried out smoothly . also , when the connector is to be connected to the mating connecting member , all of the terminal pins receive the force applied from the connector housing of the mating connecting member to the connector housing , and therefore there is obtained the more stable connection construction . moreover , the grip portion of each terminal pin is juxtaposed to one end portion of the terminal pin , and is disposed adjacent to the extremity of this one end portion , and with this arrangement when the terminal pin is to be inserted into the connector housing to be attached thereto , the force can be applied not to the grip portion of the terminal pin , but directly to the extremity of the one end portion . therefore , the grip portion will not be deformed , and besides the force can be applied linearly to the terminal pin , so that the terminal pin can be smoothly inserted into the connector housing , thus providing an excellent assembling ability .