JP2005183266A - Terminal circuit unit for on-vehicle multiplex communication - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal circuit unit for on-vehicle multiplex communication capable of reducing the number of waste vacant connector fitting part for miniaturization by easily corresponding to a change of the number of connection. <P>SOLUTION: A required number of hub-type joint connector 20, to which a terminal communication device is connected, can be connected to a joint connector 20 housing a terminal resistant circuit 40 by short pins 50 in response to a change of the number of connection. Consequently, even if the number of circuit to be connected is changed, connection can be facilitated by changing the number of the joint connector 20 to be connected. With this structure wherein the joint connectors 20 are directly connected to each other, miniaturization is enabled. The short pin 50 electrically connects a terminal resistant housing part 23 of one joint connector 20 to a vacant cavity 21a of other joint connector 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an on-vehicle multiplex communication termination circuit unit, and more particularly to an on-vehicle multiplex communication termination circuit unit that can easily cope with a change in the arrangement of a termination resistor circuit due to, for example, a vehicle grade difference.

Conventionally, an in-vehicle multiplex communication apparatus 100 as shown in FIG. 9 has been disclosed (see, for example, Patent Document 1).
The in-vehicle multiplex communication apparatus 100 controls a plurality of electrical components provided on the vehicle main body 106 and the door 107 by CAN communication. It has a plurality of hub-type joint connectors 110A, 110B, 110C to which various terminal communication devices 101a-103b are connected, and these terminal communication devices 101a-103b and joint connectors 110A, 110B, 110C are interconnected. The bus line 104 that constitutes the bus network and the termination resistor circuit unit 105 (see FIG. 10) that is the termination resistor circuit of the bus network.

As shown in FIG. 10, the joint connector 110 is provided with a plurality of connector fitting portions 112 that detachably fit and connect the male connector 111 on the upper surface of the connector housing 113 made of insulating resin. Among the plurality of connector fitting portions 112 provided in the connector housing 113, some are used as bus connection ports for connecting a bus line for multiplex communication, and the remaining are various terminal communication devices. It is used as a terminal connection port to connect. The joint circuit accommodated and held in the connector housing 113 of the joint connector 110 is composed of a plurality of chain bus bars 114 made of a conductive metal plate, and the termination resistor circuit unit 105 described above is attached thereto.
JP 2003-204340 A (FIG. 2)

  By the way, in the conventional joint connector 110 as shown in FIG. 10, since the number of the connector fitting parts 112 is determined, when the vehicle type or grade is different, the number of connections is changed with respect to the change in the number of communication devices. If the amount is small, there is a disadvantage that the connector fitting portion 112 becomes empty and is wasted. Further, when the connector fitting portion 112 is insufficient, the number of the joint connectors 110 is further increased, and there is a disadvantage that the connector fitting portion 112 is wasted.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to easily cope with a change in the number of connections, thereby reducing the number of useless empty connector fitting portions and reducing the size. An object of the present invention is to provide a termination circuit unit for in-vehicle multiple communication.

  1) In order to achieve the above-described object, an on-vehicle multiplex communication termination circuit unit according to the present invention includes a plurality of hub-type joint connectors in which terminal communication devices are connected to cavities, the terminal communication devices, and the joints. An in-vehicle multiplex communication device comprising: a bus line that interconnects connectors to form a bus network; and a termination resistor storage unit that stores a termination resistor circuit of the bus network. A plurality of in-vehicle multiplex communication devices are connected by connecting a terminal resistance storage unit and one of the empty cavities of another joint connector with a short pin.

  In the on-vehicle multiplex communication termination circuit unit configured in this way, the number of connections of a plurality of hub-type joint connectors to which terminal communication devices are connected is changed with respect to the joint connector in which the termination resistor circuit is housed. As many as required can be connected by short pins. Therefore, even if the number of connected circuits changes, it can be easily handled by changing the number of joint connectors to be connected. Further, since it is only necessary to connect the joint connectors to each other, it is possible to reduce the size. Note that the short pin is inserted and connected to a terminal resistance storage portion in one joint connector and an empty cavity in another joint connector.

  2) Moreover, the termination circuit unit for in-vehicle multiplex communication according to the present invention is characterized in that the joint connector in which the cavity is linearly formed on one side of the termination resistor housing portion is connected in parallel in the side. Yes.

  In the on-vehicle multiplex communication termination circuit unit configured as described above, since the cavity is linearly provided on one side of the termination resistor housing portion of the joint connector, the joint connectors to be connected are arranged side by side in parallel. Thus, a desired number of joint connectors can be connected. It should be noted that the directions of adjacent joint connectors are alternately opposite.

  3) Moreover, the termination circuit unit for in-vehicle multiplex communication according to the present invention is characterized in that the joint connector, in which the cavity is linearly formed on one side of the termination resistance accommodating portion, is linearly connected vertically. It is said.

  In the on-vehicle multiplex communication termination circuit unit configured as described above, since the cavity is linearly provided on one side of the termination resistor housing portion of the joint connector, the joint connectors to be connected are linearly arranged vertically. By arranging and connecting, a desired number of joint connectors can be connected. The joint connectors are all arranged in one direction.

  4) Moreover, the termination circuit unit for in-vehicle multiplex communication according to the present invention is characterized in that the joint connector has a fixing means for fixing the joint connectors to each other.

  In the on-vehicle multiplex communication termination circuit unit configured as described above, adjacent joint connectors can be connected and fixed by fixing means provided in each joint connector, so that a desired number of joint connectors are connected. be able to.

  5) In addition, in the on-vehicle multiplex communication termination circuit unit according to the present invention, the short pin is housed in the termination resistor housing portion of the joint connector and can be connected to the bus line, and the joint connector It has a female terminal part which is stored in the empty cavity and can be connected to the bus line.

  In the on-vehicle multiplex communication termination circuit unit configured as described above, the male terminal portion of the short pin is connected to the bus line accommodated in the termination resistance accommodating portion of one joint connector and the female terminal portion is adjacent to the joint. By connecting to the bus line stored in the empty cavity of the connector, joint connectors can be connected one after another. For this reason, a desired number of joint connectors can be connected.

  ADVANTAGE OF THE INVENTION According to this invention, the termination circuit unit for in-vehicle multiplex communication which can respond easily to the change of the number of connections, can reduce a useless empty connector fitting part, and can be reduced in size can be provided. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 is a perspective view showing a first embodiment of an on-vehicle multiplex communication termination circuit unit according to the present invention, FIG. 2 is a perspective view showing a joint connector, FIG. 3A is a perspective view showing a short pin, and FIG. FIG. 4B is a perspective view showing a terminal inside the short pin, and FIG. 4 is a perspective view showing a connection between the bus bar of the joint connector and the short pin.

As shown in FIG. 1, the in-vehicle multiplex communication termination circuit unit 10A according to the first embodiment of the present invention includes a plurality of (for example, two) in-vehicle multiplex communication devices 11a and 11b arranged in parallel in a short pin. It is connected by 50A.
The in-vehicle multiplex communication devices 11a and 11b are a bus type by interconnecting a plurality of hub-type joint connectors 20A in which terminal communication devices (not shown) are connected to the cavity 21, and these terminal communication devices and joint connectors 20A. The bus connector 30 (see FIG. 4) constituting the network, and the terminal joint connector 20A further includes a terminal-type resistor circuit 40 of a bus network.

  As shown in FIG. 2, the joint connector 20 </ b> A has a rectangular connector housing 22, and the connector housing 22 has an upper portion for inserting a connector (not shown) to which a terminal communication device is connected. Are provided with a plurality of cavities 21, and a termination resistor housing portion 23 for housing the termination resistor circuit 40 at the end of the connector housing 22. The cavity 21 is linearly formed on one side (for example, the front side in FIG. 2) of the termination resistance housing portion 23.

Inside the cavity 21, a male terminal 30 b (see FIG. 4) connected to the bus line 30 is provided upward, and in the terminal resistor housing portion 23, a female terminal connected to the bus line 30. 30a (see FIG. 4) is provided.
Accordingly, the terminal communication device can be connected to the male terminal 30 b of the bus line 30 by inserting the female connector to which the terminal communication device is connected into the cavity 21. Further, the termination resistor circuit 40 can be connected to the female terminal 30 a of the bus line 30 by inserting the male termination resistor circuit 40 into the termination resistor housing 23.

  One end surface 22a of the connector housing 22 (for example, the front side in FIG. 2) is provided with a protrusion 24a as a fixing means for connecting the joint connectors 20A side by side in parallel (for example, FIG. 2). In the right side). Similarly, on one side of the end face 22a opposite to the protrusion 24a (left side in FIG. 2), a recess 24b is provided as a fixing means for locking the protrusion 24a from the joint connector 20A adjacent to the left side. . On the other end face 22b (for example, the back side in FIG. 2), a protrusion 24a and a recess 24b are provided in exactly the same manner.

  The protrusions 24 a and the recesses 24 b on the end surfaces 22 a and 22 b are arranged so as to be point symmetric with respect to the center of the connector housing 22. Thereby, as shown in FIG. 1, even when the direction of the adjacent joint connector 20A is turned 180 degrees, the connection is possible.

  As shown in FIGS. 3A and 3B, the short pin 50A is housed in the male terminal portion 51 housed in the terminal resistor housing portion 23 of the joint connector 20A and in the empty cavity 21a of the joint connector 20A. And a female terminal portion 52. In the male terminal portion 51, a plurality of (for example, three) male terminals 51 a corresponding to the number of rows of the cavities 21 are exposed below, and are inserted into the terminal resistor housing portion 23. As shown in FIG. 4, it can be connected to the female terminal 30 a of the bus line 30 arranged in the termination resistance housing portion 23. On the other hand, a female terminal 52a connected to the male terminal 51a is provided inside the female terminal portion 52. By inserting the female terminal 52a into the empty cavity 21a, the female terminal 52a is exposed in the cavity 21 as shown in FIG. The bus line 30 can be connected to the male terminal 30b.

  Therefore, as shown in FIG. 1, when connecting a plurality of in-vehicle multiplex communication devices 11a and 11b side by side in parallel, at the end portion on the opposite side to the termination resistor accommodating portion 23 in each joint connector 20A. An empty cavity 21a to which a connector is not inserted is provided. Next, by rotating the adjacent joint connector 20A by 180 degrees (indicated by an arrow in FIG. 1), the terminal resistance housing portion 23 of one joint connector 20A and the empty cavity 21a of the adjacent joint connector 20A are installed in the installation direction (FIG. 1 are arranged alternately in the left-right direction). In this state, the protrusion 24a provided on the connector housing 22 is fitted into the recess 24b of the adjacent connector housing 22 to connect the joint connector 20A. Then, the female terminal portion 52 of the short pin 50A is inserted into the empty cavity 21a to connect the female terminal 52a to the male terminal 30b of the bus line 30, and the male terminal portion 51 of the short pin 50A is connected to the termination resistor accommodating portion 23. The male terminal 51 a is inserted and connected to the female terminal 30 a of the bus line 30.

  As described above, according to the above-described in-vehicle multiplex communication termination circuit unit 10A, the number of in-vehicle multiplex communication devices 11 to be connected is determined according to a change in the number of terminal communication devices to be connected, and provided in the connector housing 22. The projection 24a and the recess 24b can be easily connected. In addition, since the terminal resistor housing 23 and the empty cavity 21a of the connected adjacent joint connector 20A are electrically connected by the short pin 50A, the adjacent joint connectors 20A can be easily electrically connected, It is possible to easily cope with a change in the number of terminal communication devices to be connected. As a result, the number of useless empty cavities can be reduced and the whole can be made compact.

  Next, a second embodiment according to the present invention will be described in detail with reference to the drawings. 5 is a perspective view showing a second embodiment of the termination circuit unit for in-vehicle multiplex communication of the present invention, FIG. 6 is a perspective view showing a joint connector, FIG. 7A is a perspective view showing a short pin, and FIG. FIG. 8B is a perspective view showing a terminal inside the short pin, and FIG. 8 is a perspective view showing a connection between the bus bar of the joint connector and the short pin. In addition, the same code | symbol is attached | subjected to the site | part common to the termination circuit unit 10A for vehicle-mounted multiple communication which concerns on 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

As shown in FIG. 5, the in-vehicle multiplex communication termination circuit unit 10B according to the second embodiment of the present invention has a plurality of (for example, two) in-vehicle multiplex communication devices 11a and 11b arranged in a straight line vertically and short-circuited. It is connected by a pin 50B.
The in-vehicle multiplex communication devices 11a and 11b are a bus type by interconnecting a plurality of hub-type joint connectors 20B in which terminal communication devices (not shown) are connected to the cavity 21, and these terminal communication devices and joint connectors 20B. A bus line 30 (see FIG. 8) constituting the network is included, and the terminal joint connector 20B further includes a terminal-type resistor circuit 40 of a bus network.

  As shown in FIG. 6, the joint connector 20 </ b> B has a rectangular connector housing 22, and the connector housing 22 has an upper portion for inserting a connector (not shown) to which a terminal communication device is connected. Are provided with a plurality of cavities 21, and a termination resistor housing portion 23 for housing the termination resistor circuit 40 at the end of the connector housing 22. The cavity 21 is linearly formed on one side (for example, the front side in FIG. 6) of the termination resistor housing 23.

Inside the cavity 21, a male terminal 30 b (see FIG. 8) connected to the bus line 30 is provided upward, and the terminal terminal 23 is a female terminal connected to the bus line 30. 30a (see FIG. 8) is provided.
Accordingly, the terminal communication device can be connected to the male terminal of the bus line 30 by inserting the female connector to which the terminal communication device is connected into the cavity 21. Further, the termination resistor circuit 40 can be connected to the female terminal of the bus line 30 by inserting the male termination resistor circuit 40 into the termination resistor housing 23.

  On the side surface 25a of the connector housing 22 (for example, the right side surface in FIG. 6), a protrusion 24a and a recess 24b are provided as fixing means for connecting the joint connectors 20 in a straight line. For example, the protrusion 24a is provided so as to protrude from the end surface 22a, and the recess 24b is provided so as to be recessed from the opposite end surface 22b. FIG. 6 shows the case where the projection 24a and the recess 24b are provided only on the right side surface 25a. However, if the projection 24a and the recess 24b are similarly provided on the left side surface 25b, the joint connector 20B can be surely provided. Can be connected. At this time, also on the left side surface 25b, the protrusion 24a may be provided on the end surface 22a side, the recess 24b may be provided on the end surface 22b side, the recess 24b may be provided on the end surface 22a side, and the protrusion 24a may be provided on the end surface 22b side. Anyway

  As shown in FIGS. 7A and 7B, the short pin 50 </ b> B is accommodated in the male terminal portion 51 accommodated in the termination resistance accommodating portion 23 of the joint connector 20 and the empty cavity 21 a of the joint connector 20. And a female terminal portion 52. In the male terminal portion 51, a plurality of (for example, three) male terminals 51 a corresponding to the number of rows of the cavities 21 are exposed below, and are inserted into the terminal resistor housing portion 23. As shown in FIG. 8, it can be connected to the female terminal 30 a of the bus line 30 arranged in the termination resistance housing portion 23. On the other hand, the female terminal 52 is provided with a female terminal 52a connected to the male terminal 51a. By inserting the female terminal 52a into the empty cavity 21a, as shown in FIG. The bus line 30 can be connected to the male terminal 30b.

  Therefore, as shown in FIG. 5, when connecting a plurality of in-vehicle multiplex communication devices 11a and 11b vertically and linearly, at the end portion on the opposite side to the termination resistor accommodating portion 23 in each joint connector 20B. An empty cavity 21a to which a connector is not inserted is provided. Next, adjacent joint connectors 20B are arranged vertically and linearly, and the empty cavity 21a of one joint connector 20B and the terminal resistance housing portion 23 of the adjacent joint connector 20B are adjacent to the installation direction (front-rear direction in FIG. 5). Arrange to do. In this state, the protrusion 24a provided on the connector housing 22 is fitted into the recess 24b of the adjacent connector housing 22 to connect and fix the joint connector 20B. Then, the female terminal portion 52 of the short pin 50B is inserted into the empty cavity 21a to connect the female terminal 52a to the male terminal 30b of the bus line 30, and the male terminal portion 51 of the short pin 50B is connected to the termination resistor accommodating portion 23. The male terminal 51 a is inserted and connected to the female terminal 30 a of the bus line 30.

  As described above, according to the above-described in-vehicle multiplex communication termination circuit unit 10B, the number of in-vehicle multiplex communication devices 11 to be vertically connected is determined according to a change in the number of terminal communication devices to be connected, and is provided in the connector housing 22. The protrusions 24a and the recesses 24b can be easily connected and fixed. In addition, since the terminal resistor housing portion 23 of the connected joint connector 20B and the empty cavity 21a are electrically connected by the short pin 50B, it can be easily connected, and the number of terminal communication devices to be connected changes. It can be easily handled. As a result, the number of useless empty cavities can be reduced and the whole can be made compact.

The on-vehicle multiplex communication termination circuit unit of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, in each of the embodiments described above, the joint connectors 40A and 40B having the three connector fitting portions 42 are used as a unit, but the number of the connector fitting portions 42 is not limited to this.
Moreover, although the case where the combination of the protrusion 24a and the recessed part 24b was provided as a fixing means was demonstrated, it is not restricted to this.

1 is an exploded view showing a first embodiment of a termination circuit unit for in-vehicle multiplex communication according to the present invention. It is a perspective view which shows a joint connector. (A) is a perspective view which shows a short pin, (B) is a perspective view which shows the terminal in the inside of a short pin. It is a perspective view which shows the connection of the bus bar and short pin of a joint connector. It is a disassembled assembly figure which shows 2nd Embodiment which concerns on the termination circuit unit for vehicle-mounted multiplex communication of this invention. It is a perspective view which shows a joint connector. (A) is a perspective view which shows a short pin, (B) is a perspective view which shows the terminal in the inside of a short pin. It is a perspective view which shows the connection of the bus bar and short pin of a joint connector. It is an example of the vehicle-mounted multiplex communication apparatus conventionally used. It is a perspective view which shows the conventional termination circuit unit for vehicle-mounted multiplex communication.

Explanation of symbols

10A, 10B In-vehicle multiplex communication termination circuit units 11a, 11b In-vehicle multiplex communication devices 20A, 20B Joint connectors 21 Cavities 21a Empty cavities 23 Terminating resistor storage portions 24a Protrusions (fixing means)
24b recess (fixing means)
30 Bus line 40 Terminating resistor circuit 50A, 50B Short pin 51 Male terminal part 52 Female terminal part

Claims (5)

A plurality of hub-type joint connectors in which terminal communication devices are connected to the cavity, a bus line that interconnects these terminal communication devices and the joint connectors to form a bus network, and a termination resistor circuit for the bus network An in-vehicle multiplex communication device having a terminal resistance storage portion for storing
A termination circuit for in-vehicle multiplex communication, wherein a plurality of in-vehicle multiplex communication devices are connected by connecting the termination resistance housing portion of one joint connector and one of the empty cavities of another joint connector with a short pin. unit.   The termination circuit unit for in-vehicle multiplex communication according to claim 1, wherein the joint connector in which the cavity is linearly formed on one side of the termination resistance housing portion is connected in parallel in parallel.   2. The on-vehicle multiplex communication termination circuit unit according to claim 1, wherein the joint connector in which the cavity is linearly formed on one side of the termination resistance housing portion is vertically linearly connected. 3.   The termination circuit unit for in-vehicle multiplex communication according to claim 1, wherein the joint connector has fixing means for fixing the joint connectors to each other.   The short pin is housed in the termination resistor housing portion of the joint connector and can be connected to the bus line, and the female terminal portion is housed in the empty cavity of the joint connector and can be connected to the bus line. The termination circuit unit for in-vehicle multiplex communication according to claim 1, characterized by comprising: