JP5355333B2 - Connector for connecting lead wire to printed circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein pulling out and insertion of an electric wire is troublesome since removal of a cover is required every pulling out and insertion of the electric wire regarding a conventional connection tool and poor contact caused by weakened spring force due to repetition of pulling out and insertion of the electric wire and long-term use may be generated since a locking spring 6 is a leaf spring in the connection tool. <P>SOLUTION: In the connection tool, the cover 4 is integrated with a case 1, and a coil spring 3 and an operating body 3 are stored in the case 1. The operating body is projected from the case, a lead wire is inserted between the case and the cover by making the projected operating body be displaced against spring force of the coil spring 2, and lead wire is connected to a printed circuit board so as to hold the operating body between a shoulder section 33a of the operating body 3 and the cover 4 with spring force of the coil spring 2 by separating a hand from the operating body. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a printed wiring board that can easily connect or disconnect a lead wire, which is a power line or a signal line, to a connector fixed by soldering to a conductive pattern of the printed wiring board. The present invention relates to a connection tool for connecting a lead wire to a cable.

  For example, an invention disclosed in Japanese Patent Application Laid-Open No. 54-155488 is disclosed in which a connector is attached to a printed wiring board and a lead wire is attached to the connector to connect the lead wire to the conductive pattern of the printed wiring board. There is. The present invention incorporates a plug blade 1, a terminal plate 2, and a lock spring 6 in a main body 10, integrates a dowel formed on the plug blade 1 with a hole in the terminal plate 2, and connects the lock spring 6 in the terminal plate 2. Insert into.

  Further, the button 7 is slidably attached to the electrode contact surface 3 of the terminal plate 2, and the lock spring 6 is deformed by sliding the button 7 so that a gap is formed between the lock spring 6 and the electrode contact surface 3. In this state, when the electric wire is inserted from the electric wire insertion notch 11 formed in the main body 10 and the hand is released from the button 7, the electric wire is moved between the lock spring 6 and the electrode contact surface 3 by the restoring force of the lock spring 6. It is sandwiched between the back side.

  In addition, a cover 13 is attached to the opening of the main body 10. To operate the button 7 to hold the electric wire, the cover 13 is removed from the main body 10 and the above operation is performed. And the cover 13 is put on the main body 10 after being sandwiched between the electrode contact surface 3 and the back surface side of the electrode contact surface 3.

JP 54-155488 A

  In the invention of the selection technical literature described above, since the cover must be removed every time the electric wire is inserted and removed, there is a problem that the electric wire is troublesome to insert and remove, and the lock spring 6 is a leaf spring. There has been a problem that the spring force is weakened due to repeated insertion and removal of electric wires and long-term use, resulting in poor contact.

  The present invention is intended to solve the above-described problems. The object of the present invention is to integrate a cover with the case, house the coil spring and the operating body in the case, and remove the operating body from the case. Since the lead wire can be inserted and removed, it can be easily inserted and removed without the need to remove the cover when connecting or disconnecting the lead wire, and it consists of four parts. The number of parts is small and assembly is easy and the cost can be reduced. Also, the lead wire is clamped by the spring force of the coil spring. Therefore, the lead wire can be reliably held over a long period of time and the printed wiring board can be prevented from causing poor contact. It is to provide cents connector for connecting the lead wire.

  The connector for connecting a lead wire to the printed wiring board of the present invention does not achieve the above-mentioned object, and the means of claim 1 is provided on one of a pair of upright pieces formed in a U shape. A conductive metal case in which an insertion notch for inserting a core wire of the cable is formed, and a hole is formed in the center of the bent portion of the bottom surface on the side where the insertion notch is formed; A coil spring inserted into the bottom of the case, a protrusion engaged with the hole of the case, a vertical part extending from the protrusion along the standing piece of the case, and one end of the coil spring contacting A conductive metal operating body formed of an inclined portion having a shoulder extending obliquely from the vertical portion, an operating portion extending vertically from the inclined portion, and formed in a U shape. Fixing means for fixing in the state of covering the opening side of the case An opening for leading out the operation portion of the operation body, and a conductive metal cover formed from a terminal piece hanging from both sides of the top surface portion and projecting from the bottom surface portion of the previous case, To do.

  According to a second aspect of the present invention, in the first aspect of the present invention, the fixing means for fixing the cover to the case has an inclined surface formed on the opposite surface of the case on the opposite surface of the cover. The nail piece formed on the cover is bent and fixed, and the engagement notch is formed on the bottom surface of the case, and the terminal piece of the cover is bent and engaged with the engagement notch. It is characterized by being fixed.

  According to a third aspect of the present invention, in the first aspect, a bulge portion that bulges outward is formed on the back side where the lead wire of the top surface portion of the cover is inserted, and the lead wire is connected to the shoulder portion of the operating body. It is characterized in that the leading end portion of the lead wire is accommodated in a state of being sandwiched between the standing portion of the case.

  As described above, in the present invention, the cover is integrated with the case, the coil spring and the operating body are accommodated in the case, the operating body is protruded from the case, and the protruding operating body is used as the spring force of the coil spring. The lead wire is inserted between the case and the cover by moving against the cover, and the hand is released from the operation body so that it is clamped between the shoulder of the operation body and the cover by the spring force of the coil spring. Therefore, the operation of inserting / removing the lead wire is very easy and the spring force does not change because it is a coil spring even when the lead wire is repeatedly inserted / removed and used for a long time. It can be reliably performed over a long period of time and does not cause poor contact. Also, the number of parts is small and the structure is simple, so the assembly is simple and the cost is reduced. Door can be.

  Also, the claw pieces formed on the opposing surfaces of the cover are bent on the inclined surfaces formed on the opposing surfaces of the case to fix the case and the cover, and the case is engaged with the bottom surface of the case. The case and cover are fixed by two fixing means by bending and engaging the terminal piece of the cover at the joint notch and fixing the case and the cover, so that the case and the cover can be reliably integrated without looseness. It is.

  Further, a concave portion that bulges outward is formed on the back side of the cover where the lead wire of the top plate is inserted, and the lead wire is sandwiched between the shoulder portion of the operating body and the top plate portion of the case. The core wire enters the concave portion, and the contact area between the multi-core wire and the inner surface of the cover is increased, so that the contact resistance can be reduced.

It is a disassembled perspective view which shows the Example of the connector for connecting a lead wire to the printed wiring board of this invention. It is a side view of the assembled state. It is the sectional view on the AA line of FIG. It is a perspective view before inserting the lead wire after soldering and fixing the connector of the present invention to the printed wiring board. (A) is a cross-sectional view of a state in which the operating body is displaced against the spring force of a coil spring and a core wire of a lead wire is inserted, and (b) is a cross-sectional view of a state in which the core wire is sandwiched.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a connector for connecting lead wires to a printed wiring board according to the present invention will be described below with reference to the drawings.
Reference numeral 1 denotes a case formed by bending a conductive metal into a U shape. Engagement cutout portions 11a to be engaged with terminal pieces 42b of the cover 4 described later are formed on the center left and right of the bottom surface portion 11, and The bent portion 12 of the upright pieces 12 and 13 formed before and after the bottom surface portion 11 is formed with a hole 12a into which a projection 31 of the operation body 3 to be described later is engaged. Insertion notches 12b for insertion are formed, and inclined surfaces 12c and 13a that are locked by bending the claw pieces 42a of the cover 4 are formed on both sides of the side surfaces of the upright pieces 12 and 13. Yes.

  Reference numeral 2 denotes a coil spring placed on the bottom surface portion 11 of the case 1, and one end abuts on the inner wall surface of the upright piece 13 and the other end abuts on the operating body 3 set in the case 1.

  Reference numeral 3 denotes an operating body, a projection 31 that engages with the hole 12a of the case 1, and an extension from the projection 31 along the upright piece 12 of the case 1, and one end of the coil spring 2 is It is formed of a vertical portion 32 that abuts, an inclined portion 33 having a shoulder portion 33a extending obliquely from the vertical portion 32, and an operating portion 34 extending vertically from the inclined portion 33.

  Reference numeral 4 denotes a cover formed by bending a conductive metal in a U shape. The top surface 41 has an opening 41a from which the operation portion 34 of the operation body 3 set in the case 1 protrudes outward. The ridges 41b that swell up are formed, and the hanging pieces 42 that hang down from both sides of the top surface portion 41 are formed, and the inclined surfaces 12c and 13a of the case 1 are bent by bending the case 1 inward. A claw piece 42a to be engaged with is formed. Further, a terminal piece 42b is formed which is bent in an L shape from a substantially central lower part of the hanging piece 42 and is engaged with an engaging cutout portion 11a formed on the bottom surface portion 11 of the case 1.

  In order to assemble the case 1, the coil spring 2, the operation body 3 and the cover 4 configured as described above, first, the projection 31 of the operation body 3 is fitted into the hole 12 a of the case 1, and then the coil spring 2 is attached to the operation body 3. Between the vertical portion 32 and the upright piece 13 of the case 1. Next, the cover 4 is put on the case 1 and fitted so that the bent portion of the terminal piece 42 b is located on the back side of the engagement notch 11 a of the case 1.

  Next, when the claw piece 42a is folded inward, the claw piece 42a is in a state along the inclined surfaces 12c and 13a of the case 1, so that the upper end of the claw piece 42a contacts the upper horizontal surface of the inclined surfaces 12c and 13a. Touch. Therefore, the cover 4 is fixed to the case 1 by two places: engagement between the terminal piece 42b and the engagement notch 11a, and engagement between the claw piece 42a and the upper horizontal surface of the inclined surfaces 12c and 13a. The case 1 and the cover 4 are surely locked and are not separated.

  Then, the connector of the present invention assembled in this way is inserted into the through hole 51 in the printed wiring board 5 and the terminal piece 42c is soldered to a conductive pattern (not shown) formed on the back surface of the printed wiring board 5. Fix it.

  In order to attach the core wire 6a of the lead wire 6 in this state, when the operating body 3 is normal, the back side of the insertion notch 12b in the case 1 is inclined by the spring force of the coil spring 2 as shown in FIG. Since it is closed by the portion 33, the operation portion 34 is moved to the right as shown in FIG. 5A against the spring force of the coil spring 2, so that the insertion notch 12b Since the side is opened, the core wire 61 of the lead wire 6 can be inserted.

  When the core wire 61 of the cable 6 is inserted from the insertion cutout portion 12b to the innermost portion, the shoulder portion 33a of the inclined portion 33 of the operating body 3 is positioned below the core wire 61 in this state. In this state, when the hand is released from the operating portion 34, the operating body 3 is returned to the initial position direction by the spring force of the coil spring 2 as shown by the solid line in FIG. Is sandwiched between the back surface of the raised portion 41b and is in a fixed state.

  In this fixed state, since the core wire 61 of the lead wire 6 enters the raised portion 41b and the contact area between the core wire and the inner surface of the cover is large, the core wire has a large area and is in contact with the raised portion 41b. Can be reduced to prevent signal attenuation and voltage drop.

  If the lead wire 6 is removed for some reason, the lead wire 6 is removed by returning it against the spring force of the coil spring 2 from the holding state of the core wire shown by the solid line in FIG. 5B to the position shown by the two-dot chain line. Can do.

DESCRIPTION OF SYMBOLS 1 Case 11 Bottom face part 11a Engagement notch part 12, 13 Standing piece 12a Hole 12b Insertion notch part 12c, 13a Inclined surface 2 Coil spring 3 Operation body 31 Protrusion part 32 Vertical part 33 Inclination part 33a Shoulder part 34 Operation part 4 Cover 41 Top surface portion 41a Opening portion 41b Raised portion 42 Hanging piece 42a Claw piece 42b Terminal piece

Claims (3)

One of the pair of upright pieces formed in a U-shape is formed with an insertion notch for inserting the core wire of the cable, and at the center of the bent portion of the bottom surface on the side where the insertion notch is formed. A conductive metal case with holes, and
A coil spring inserted into the bottom surface of the case;
A protrusion that engages with the hole of the case, extends from the protrusion along the rising piece of the case, and a vertical portion that contacts one end of the coil spring, and extends obliquely from the vertical portion. A conductive metal operating body formed from an inclined portion having a shoulder portion and an operating portion extending vertically from the inclined portion;
A fixing means that is formed in a U-shape and is fixed in a state of being covered on the opening side of the case, an opening for deriving the operation part of the operating body, and suspended from both sides of the top surface part, from the bottom part of the case A conductive metal cover formed from protruding terminal pieces;
A connector for connecting a lead wire to a printed wiring board, comprising:   The fixing means for fixing the cover to the case bends and fixes the claw pieces formed on the opposing surfaces of the cover on the inclined surfaces formed on the opposing surfaces of the case. The printed wiring according to claim 1, wherein an engagement notch is formed on a bottom surface of the case, and a terminal piece of the cover is bent and engaged and fixed to the engagement notch. A connector for connecting lead wires to the board.   A tip of the lead wire is formed in a state where a bulge portion that bulges outward is formed on the back side where the lead wire of the top surface portion of the cover is inserted, and the lead wire is sandwiched between the shoulder portion of the operating body and the standing portion of the case 2. A connector for connecting a lead wire to a printed wiring board according to claim 1, wherein the portion is accommodated.

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