JP2005142007A - Electrical connection structure - Google Patents

Abstract

The present invention provides an electrical connection structure that requires only a small mounting space even when an electrical connector having a ZIF structure is used and is suitable for high-density mounting.
A through hole 5a is formed in a circuit board 5, a flexible wiring board 4 is arranged on the opposite side of the circuit board 5 from the side on which the connection terminal 5a is provided, and the circuit board 5 is placed on the opposite side through the circuit board 5. The connection terminals 4a of the flexible wiring board 4 positioned and the corresponding connection terminals 5a of the circuit board 5 are conductively connected through an electrical connector Ce having a ZIF structure mounted in the through hole 5a of the circuit board 5. A plurality of connectors 2 are arranged side by side on the electrical connector Ce, and the first connection terminal portions 2a and the second connection terminal portions 2b formed at both ends of each connector 2 are connected to the corresponding flexible wiring boards 4, respectively. Conductive contact is made between the terminal 4a and the connection terminal 5a of the circuit board 5.
[Selection] Figure 2

Description

  The present invention relates to an electrical connection structure for electrically connecting a circuit board and a flexible wiring board.

  In general, as an instrument that collectively connects a plurality of connection terminals arranged at one end of a flexible printed circuit board to corresponding connection terminals on a circuit board, an electrical circuit as disclosed in Patent Document 1 is used. Connector is in use.

  In this conventional electrical connector, a so-called ZIF (Zero Insertion Force) structure is employed so that the connection terminal portion of the flexible wiring board can be easily and reliably inserted into the electrical connector.

  In an electrical connector having a ZIF structure, a plurality of connectors each having connection terminal portions formed at both ends are usually arranged in parallel inside, and a flexible wiring board inserted into one of the connection terminal portions of these connectors. Actuators are provided for pressing and contacting the corresponding connection terminals. When inserting the flexible wiring board, the actuator is largely retracted from the vicinity of one of the connection terminals of the connector so that the end of the flexible wiring board is inserted smoothly, and after insertion, the end of the flexible wiring board is inserted. These connection terminals are rotatably provided so as to be surely brought into press contact with one connection terminal portion of the corresponding connector in the electrical connector.

However, it is inevitable that the electrical connector of the ZIF structure provided with the above-described rotary actuator will increase the external shape of the electrical connector to some extent by adopting the ZIF structure. For example, it is thin such as a high-definition liquid crystal display module Not suitable for electrical connection in high-density mounting equipment.
JP 2003-45526 A

  An object of the present invention is to provide an electrical connection structure suitable for thin and high-density mounting because a mounting space can be reduced even if an electrical connector having a ZIF structure including a rotary actuator is used.

  In order to solve the above problems, an electrical connect structure of the present invention is an electrical connect structure in which a plurality of connection terminals of a circuit board and a plurality of connection terminals of a flexible wiring board are electrically connected via an electrical connector, A through hole penetrating from the front surface to the back surface of the circuit board on which the plurality of connection terminals are formed is provided at a position adjacent to the terminal array portion on which the plurality of connection terminals are formed on the board, and the flexible wiring board Arranged on the back side of the circuit board, arranged at a position from the front side of the circuit board through the through hole to the back side, and conductive contact with one connection terminal of the flexible board arranged on the back side of the circuit board A first connection terminal portion to be brought into contact with a connection terminal corresponding to the one connection terminal of the flexible wiring board on the surface of the circuit board. An electrical connector including a plurality of connectors to be connected, and each connection terminal of the circuit board and each connection terminal of the flexible wiring board corresponding thereto are electrically connected through the connector. is there.

  According to the electrical connect structure of the present invention, through holes are formed in the circuit board, electrical connectors are installed through the through holes, and the connection terminal portions at both ends of the connector are respectively positioned on the front and back surfaces of the circuit board. Therefore, the ratio of the installation space occupied by the electrical connector on both the front and back sides of the circuit board is reduced, and high-density mounting is possible even when a ZIF structure electrical connector having a rotary actuator is used.

  In the electrical connection structure of the present invention, the electrical connector is closed to press-contact the open position where the electrical connector is retracted from the vicinity of the first connection terminal portion, the connection terminal at the end where the flexible wiring board is inserted, and the first connection terminal portion. It is preferable that the actuator is provided so as to be rotatable between the positions, but this facilitates the work of inserting the flexible wiring board into the electrical connector, and is suitable not only for high-density mounting. It is possible to provide an electrical connect structure excellent in mounting workability.

Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a plan view showing an electrical connect structure as an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the electrical connect structure cut along line II-II in FIG. 1, and FIG. 3 is a diagram showing an electrical connect operation. FIG.

  In FIG. 1, a housing 1 formed in an elongated housing shape using an insulating resin material has a pair of openings 1 a and 1 b that are positioned substantially diagonally with respect to each other in the housing cross section. The size is formed over substantially the entire length in the longitudinal direction.

  In the housing 1, a plurality of connectors 2 made of a conductive material such as metal are arranged in parallel in the longitudinal direction of the housing 1 at a predetermined pitch p. As shown in FIG. 2, each connector 2 is formed to a length that can substantially traverse the inside of the housing 1, and a first connection terminal portion 2a and a second connection terminal portion 2b are formed at both ends, respectively. The connection end portion 2a is located in one opening 1a, and the second connection terminal portion 2b is installed so as to protrude from the other opening 1b. In this case, holding parts 1d for holding the plurality of connectors 2 in parallel at a predetermined pitch are formed on the top plate 1c of the housing 1 in parallel at a pitch p, and each connector is connected to these holding parts 1d. By inserting the flange 2c formed on the connector 2, each connector 2 is held in parallel at a predetermined position at a pitch p.

  An actuator 3 is rotatably installed in one opening 1 a of the housing 1. The actuator 3 is provided to press the flexible wiring board 4 inserted from the opening 1 a into the housing 1 toward the row of connectors 2. As shown in FIG. 1, the actuator 3 in the present embodiment is large enough to be fitted into an opening (hereinafter referred to as a board insertion opening) 1 a into which the flexible wiring board 4 of the housing 1 is inserted and to close the entire region. The both side end portions are rotatably supported by pins 1f and 1f erected on both side walls 1e and 1e of the housing 1, respectively.

  The electrical connector Ce configured as described above is mounted in a rectangular through hole 5 a formed through the circuit board 5. The through hole 5a is a rectangular long hole that is approximately one round smaller than the planar shape of the electrical connector Ce as shown by a two-dot chain line in FIG.

  In order to attach the electrical connector Ce to the through hole 5a, first, the electrical connector Ce is inserted into the through hole 5a from the diagonally upper side opposite to the side where the connection terminal 5b of the circuit board 5 is provided (hereinafter referred to as the back side). An opening (hereinafter referred to as a terminal protruding port) 1b from which the second connection terminal portion 2b of the connector Ce of the connector Ce protrudes is inserted, and the flange portion 1g of the top plate 1c and the second connection terminal portion 2b face each other. The through-hole edge 5c in which the connection terminal 5a of the circuit board 5 is arrange | positioned is inserted in the space to perform. Thereby, the 2nd connection terminal part 2b of the connector 2 and the connection terminal 5b of the circuit board 5 can be reliably conduct-contacted. After that, if the bottom surface 1h of the portion of the housing 1 on the side of the board insertion opening 1a is adhered to the through hole edge 5c of the circuit board 5 with an adhesive member such as a double-sided tape (not shown), the mounting of the electrical connector Ce is completed.

  When the flexible wiring board 4 is inserted into the electrical connector Ce installed as described above, the actuator 3 is rotated to open the board insertion port 1a of the housing 1 as shown in FIG. And the edge part in which the connection terminal 4a of the flexible wiring board 4 is arrange | positioned is inserted in the electrical connector Ce from this open | released board | substrate insertion port 1a. At this time, the distal end portion into which the flexible wiring board 4 is inserted advances to the back side while being guided by the row of opposing connectors 2 and the inner surface of the housing top plate 1 c, and the distal end surface is bent in a U shape in each connector 2. Abuts against the back end face of the part. Here, the insertion of the flexible wiring board 4 is completed. As described above, in this electrical connector Ce, the actuator 3 can be greatly opened to widely open the board insertion slot 1a, and the accommodation space at the end of the flexible wiring board 4 to be inserted is formed obliquely with a sufficient width. Therefore, the end portion of the flexible wiring board 4 can be easily and smoothly inserted into the electrical connector Ce. Here, as shown in FIG. 1, the width direction position of the end portion of the flexible wiring board 4 to be inserted is defined by the width W1 of the accommodation space connected to the board insertion slot 1a and the width W2 of the end portion of the flexible wiring board 4. By setting the same dimension (strictly speaking, the width W2 is slightly smaller than W1), it is determined at the same time as the insertion is completed. The position in the width direction of the end portion of the flexible wiring board 4 may be determined based on a positioning mark provided on both sides.

  When the insertion of the end of the flexible wiring board 4 is finished, the actuator 3 is rotated in the clockwise direction indicated by the arrow to close the board insertion port 1a, and the connection terminal 4a at the end of the flexible wiring board 4 is connected to the actuator 3. The end of the flexible wiring board 4 is pressed toward the first connection terminal portion 2 a of the connector 2 by making contact with a surface not provided (this surface is the back surface). At this time, since the first connection terminal portion 2a of the connector 2 is located at the closed position (substrate insertion opening 1a) of the actuator 3, it is connected to the corresponding connection terminal 4a at the end portion of the flexible wiring substrate 4 to be pressed. Abutting, forcibly pushed and bent in this abutted state and retracted from the closed position. Therefore, in the closed completion state in which the actuator 3 is located at the specified closing position, the first connection terminal portion 2a of each connector 2 is connected to the connection terminal 4a on the flexible wiring board 4 side corresponding to its own elastic force. The two are securely in contact with each other. Thereby, the insertion of the flexible wiring board 4 into the electrical connector Ce is completed.

  As described above, according to the electrical connect structure of the present embodiment, the flexible wiring board 4 is disposed on the side opposite to the side on which the connection terminal 5 a of the circuit board 5 is provided, and the circuit board 5 is disposed on the opposite side. Since the connection terminal 4a of the flexible wiring board 4 located in the circuit board 5 and the corresponding connection terminal 5a of the circuit board 5 are electrically connected through the electrical connector Ce mounted in the through hole 5a penetrating the circuit board 5, the outer shape is Even when a thick and large electrical connector Ce is used, the mounting space occupied by the electrical connector Ce on the circuit board 5 can be kept small. As a result, thin and high-density mounting can be remarkably promoted even when the ZIF-structured electrical connector Ce is used, which allows the flexible wiring board 4 to be easily and smoothly inserted, but whose outer shape tends to be thick and large.

  In addition, this invention is not limited to embodiment mentioned above. For example, in the above-described embodiment, the flexible wiring board 4 is arranged with the surface on which the connection terminals 4 a are provided facing the circuit board 5, but the flexible wiring board is opposed to the circuit board 5. The electrical connection structure of the present invention is also suitable for the arrangement. In this case, by changing the shape of the connector 2, the first connection terminal portion 2 a of the connector 2 can be brought into conductive contact with the connection terminal arrangement surface of the flexible wiring board that is opposite to the circuit board 5.

It is a top view which shows the electrical connection structure as one Embodiment of this invention. It is sectional drawing which cut | disconnects and shows the electrical-connect structure of FIG. 1 by the cut surface corresponding to the II-II line | wire of FIG. It is sectional drawing corresponding to FIG. 2 which shows the state at the time of flexible wiring board insertion in the electrical connection structure of FIG.

Explanation of symbols

1 Housing 1a Opening (PCB insertion slot)
1b Opening (terminal protrusion)
2 connector 2a first connection terminal part 2b second connection terminal part 3 actuator 4 flexible wiring board 4a connection terminal (of flexible wiring board)
5 Circuit board 5a Through hole 5b Connection terminal (on circuit board)
Ce electrical connector

Claims (2)

An electrical connection structure for electrically connecting a plurality of connection terminals of a circuit board and a plurality of connection terminals of a flexible wiring board via an electrical connector,
Providing a through hole penetrating from the front surface to the back surface of the circuit board on which the plurality of connection terminals are formed at a position adjacent to the terminal array portion on which the plurality of connection terminals are formed on the circuit board;
Placing the flexible wiring board on the back side of the circuit board;
A first connection terminal portion disposed at a position from the front surface side of the circuit board to the back surface side through the through hole, and conductively contacting one connection terminal of the flexible substrate disposed on the back surface side of the circuit board; Each connection of the circuit board by means of an electrical connector comprising a plurality of connectors having a second connection terminal portion in conductive contact with a connection terminal corresponding to the one connection terminal of the flexible wiring board on the surface of the circuit board An electrical connection structure characterized in that a terminal and each connection terminal of the flexible wiring board corresponding thereto are electrically connected through the connector.   The electrical connector is between an open position retracted from the vicinity of the first connection terminal portion and a closed position where the connection terminal at the end where the flexible wiring board is inserted and the first connection terminal portion are pressed and contacted. The electrical connect structure according to claim 1, further comprising an actuator provided to be rotatable.

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