JP2011054370A - Circuit case with terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate manufacturing by joining connection terminals of two types in a case. <P>SOLUTION: A holder 4 fixed with a through pin 3 is inserted from a lower end pin 3b side of the through pin 3 into a holder mounting hole 1b of the case 1 from above. In the insertion process, each lower end pin 3b of the through pin 3 is fitted in a cylindrical receiving part 2b of the connection terminal 2 which is previously inserted in the case 1, and passes through the cylindrical receiving part 2b, and the connection terminal 2 and the through pin 3 are electrically connected to each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a circuit case with a terminal used in an electric circuit such as an automobile.

  In automobiles and the like, for example, Patent Document 1 discloses an electronic unit that collects wirings of various electronic devices and connects them to a mating connector. In this electronic unit, a large number of pin terminals, one end of which is connected to a built-in electronic circuit, protrude toward the outside of the case.

JP 2004-274554 A

  However, in the above-mentioned Patent Document 1, a complicated mechanism is employed to securely fix a large number of pin terminals to the case, resulting in an increase in cost. For example, the pin terminal is usually bent in an L shape within the case, which complicates the manufacturing process.

  The object of the present invention is to solve the above-mentioned problems and provide a circuit case with a terminal that can be easily manufactured by joining two kinds of connection terminals in the case without using an L-shaped terminal. There is to do.

  In order to achieve the above object, a circuit case with a terminal according to the present invention comprises a case made of synthetic resin, and a plurality of connection terminals inserted into the case and having a cylindrical receiving portion at the front end and an electric wire connected at the rear end. A holder made of synthetic resin to be attached to the case from a direction perpendicular to the insertion direction of the connection terminal, and the same number of through pins as the connection terminal fixed to the holder in parallel to the attachment direction of the holder, The through pin has a lower end pin that fits into a cylindrical receiving portion of the connection terminal, and an upper end pin that is opposite to the lower end pin and protrudes toward the outside of the case.

  According to the circuit case with a terminal according to the present invention, the two connection terminals can be easily joined inside the case, and the assembly is facilitated.

It is sectional drawing of a circuit case with a terminal. It is a top view of a case, a side view, and a sectional view. It is the top view and side view of a connection terminal. It is the front view of a through pin, a side view, and an expanded sectional view. It is a top view of a holder, a front view, and a side view. It is the top view and front view of a protective cover. It is a disassembled perspective sectional view of the principal part. It is sectional drawing of the circuit case with a terminal of the state which temporarily attached the holder to the case.

The present invention will be described in detail based on the illustrated embodiments.
FIG. 1 is a cross-sectional view of a circuit case with a terminal according to an embodiment. The circuit case with terminals includes a case 1, a plurality of connection terminals 2, a plurality of through pins 3, a holder 4, and a protective cover 5.

  2A is a plan view of the case 1, FIG. 2B is a side view, and FIG. 2C is a cross-sectional view. A plurality of terminal insertion holes 1a into which the connection terminals 2 are respectively inserted in the horizontal direction are provided in the lower part of the case 1 made of a synthetic resin material, and a holder mounting hole 1b and a protective cover mounting hole 1c in the vertical direction are provided in the upper part. The terminal insertion hole 1a and the holder mounting hole 1b are communicated with each other in the case 1.

  The entrance of the terminal insertion hole 1a has a circular shape with a large diameter, a pedestal 1d on which the tip of the connection terminal 2 is placed at the back of the terminal insertion hole 1a, and a cross-section that holds a cylindrical receiving portion to be described later A semicircular holding portion 1e is provided, and a recess 1f for receiving the lower end pin of the through pin 3 is formed below the holding portion 1e. Further, a presser portion 1g that prevents the connection terminal 2 from floating and also serves as a guide when the connection terminal 2 is inserted is provided.

  FIG. 3A is a plan view of the connection terminal 2, and FIG. The connecting terminal 2 is formed by punching and bending a conductive metal plate. A connecting portion including a cylindrical receiving portion 2b is formed at the center of the flat tip portion 2a, and a U-shaped crimping piece at the rear end portion. The electric wire 2d is fixed by the electric wire crimping portion 2c obtained by bending the wire. A cylindrical waterproof seal material 2e made of synthetic rubber is inserted into each electric wire 2d.

  4A is a front view of the through pin 3, FIG. 4B is a side view, and FIG. 4C is an enlarged sectional view. The through pin 3 is formed by punching and bending a conductive metal plate, and the upper end pin 3a and the lower end pin 3b of the through pin 3 are connected by an intermediate portion 3c. The upper end pin 3a and the lower end pin 3b are formed by folding a metal plate into a square cross section and forming a pin shape without a cavity inside, and each tip has a cone shape. The distance between the corners passing through the center of the lower end pin 3b is often larger than the inner diameter of the cylindrical receiving portion 2b of the connection terminal 2.

  Therefore, even when the metal plate is thin, the thickness of one side of the upper end pin 3a and the lower end pin 3b can be sufficiently increased as compared with the thickness of the metal plate to increase the strength. Further, the intermediate portion 3c of the through pin 3 is wide, and locking portions 3d protrude in a wing shape on both sides thereof.

  5A is a plan view of the holder 4 made of a synthetic resin material and attached with the through pin 3, FIG. 5B is a front view, FIG. 5C is a side view, and the holder 4 is in the holder mounting hole 1b of the case 1. It comes to be attached to. The through pin 3 is fixed to the holder 4 and formed by injection molding, and the through pin 3 and the holder 4 are integrated. As a result, the holder 4 is obtained in which the upper end pin 3a of the through pin 3 protrudes from the upper portion and the lower end pin 3b protrudes from the lower portion.

  6A is a plan view of the protective cover 5, and FIG. 6B is a front view. The protective cover 5 made of synthetic resin has a frame portion 5a and protects the upper end pin 3a of the through pin 3 protruding upward from the holder 4 attached to the case 1 and is fitted to the mating connector by the frame portion 5a. Have been to. Further, when the protective cover 5 is attached to the protective cover mounting hole 1 c of the case 1, the protective cover 5 can be attached to the case 1 in two stages. That is, the protective cover 5 is shallowly mounted in the protective cover mounting hole 1c of the case 1 in the temporary mounting position, and is deeply mounted in the protective cover mounting hole 1c in the main mounting position by pushing, and can be locked to the case 1 at each position. Has been.

  At the time of assembly, as shown in FIG. 7, when the connection terminals 2 with the electric wires 2d are individually inserted into the terminal insertion holes 1a from the side of the case 1 with the cylindrical receiving portions 2b facing downward, The distal end portion 2a enters while being guided by the presser portion 1g of the case 1, and stops with the axis of the cylindrical receiving portion 2b aligned in the vertical direction. In this state, the distal end portion 2a of the connection terminal 2 is placed on the base 1d, the cylindrical receiving portion 2b is held by the holding portion 1e, and is pressed and positioned by the holding portion 1g. Pulled out. Further, the waterproof sealing material 2e provided around the electric wire 2d is in close contact with the inner peripheral surface of the large-diameter inlet portion of the terminal insertion hole 1a of the case 1, and the waterproof property in this portion is ensured.

  Next, as shown in FIG. 7, the holder 4 to which the through pin 3 is fixed is inserted into the holder mounting hole 1 b of the case 1 from above from the lower end pin 3 b side of the through pin 3. In this insertion process, the lower end pin 3b of the through pin 3 is fitted into the cylindrical receiving portion 2b of the connecting terminal 2 inserted in advance and passes through the cylindrical receiving portion 2b. The connecting terminal 2 and the through pin 3 are electrically connected to each other. Connected. The connection between the connection terminal 2 and the holder 4 is such that the contact inner surface of the cylindrical receiving portion 2b of the connection terminal 2 is circular, the lower end pin 3b of the through pin 3 is square, and the passing between the corner portions of the lower end pin 3b is not Since it is often made larger than the inner diameter of the cylindrical receiving portion 2b, the corner portion of the lower end pin 3b reliably contacts the inner surface of the cylindrical receiving portion 2b.

  Subsequently, the protective cover 5 is temporarily attached to the case 1 as shown in FIG. 8 to protect the upper end pin 3a. This is to prevent the upper end pin 3a of the through pin 3 from being inadvertently touched and damaged by transporting the terminal-equipped circuit case in this state.

  When the actual circuit case with terminals is used, the protective cover 5 is deeply attached to the case 1 as shown in FIG. 1 and the upper end pin 3a is exposed. The terminal-equipped circuit case thus assembled is fixed on, for example, a printed circuit board, the other end of the electric wire 2d is connected to a predetermined circuit terminal, and the upper end pin in the protective cover 5 on the upper portion of the case 1 The connection terminal of the mating connector is fitted to 3a to make an electrical connection.

  At this time, the protective cover 5 is provided with a locking mechanism (not shown) for connecting with the mating connector, and once the mating connector is fitted, it will not come off inadvertently.

  Although the through pin 3 is fixed integrally during the injection molding of the holder 4, the through pin 3 may be inserted into a through pin insertion hole provided in the holder 4 and fixed after the holder 4 is molded.

1 Case 2 Connection terminal 3 Through pin 4 Holder 5 Protective cover

Claims (3)

  A case made of synthetic resin, a plurality of connection terminals inserted into the case and having a cylindrical receiving portion at the front end and connected to an electric wire at the rear end, and attached to the case from a direction orthogonal to the insertion direction of the connection terminal A holder made of synthetic resin, and a through pin of the same number as the connection terminal fixed to the holder in parallel with the mounting direction of the holder, the through pin being fitted in a cylindrical receiving portion of the connection terminal, A circuit case with a terminal, comprising: an upper end pin on the opposite side of the lower end pin and projecting outward from the case.   The circuit case with a terminal according to claim 1, wherein an upper end pin of the through pin is surrounded by a protective cover separate from the case.   The circuit case with a terminal according to claim 2, wherein the protective cover is coupled to a mating connector to lock the mating connector.

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