JP2005166523A - On-vehicle terminating circuit unit for multiplex communication - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle terminating circuit unit for multiplex communication capable of easily responding to a change in connecting number and being made compact by eliminating a wasteful empty connector fitting part. <P>SOLUTION: This unit comprises a connector housing 20 for storing a terminating resistor circuit 30 and stackable and connectable joint connectors 40A and 40B to be connected to the connector housing 20. Accordingly, only a necessary number of joint connectors 40A and 40B are stacked and connected to the connector housing 20 storing the terminating resistor circuit 30. Even if the number of circuits to be connected is changed, this unit can easily respond thereto by changing the number of the joint connectors 40A and 40B to be stacked. Since the joint connectors 40A and 40B are directly connected, the unit can be made compact. <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. 13 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 constituting the bus network and the termination resistor circuit unit 105 (see FIG. 14), which is the termination resistor circuit of the bus network, are provided.

As shown in FIG. 14, the joint connector 110 is provided with a plurality of connector fitting portions 112 for detachably fitting the male connector 111 on the upper surface of the insulating resin connector housing 113. 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. 14, since the number of the connector fitting parts 112 is decided, when the vehicle type and grade differ, 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 for in-vehicle multiplex communication that can be made compact by eliminating a useless empty connector fitting portion by being able to easily cope with a change in the number of connections. It is to provide a termination circuit unit.

  1) In order to achieve the above-described object, a termination circuit unit for in-vehicle multiplex communication according to the present invention includes a plurality of hub-type joint connectors each connected to each terminal communication device, and these terminal communication devices and joints. An in-vehicle multiplex communication apparatus comprising a bus line that interconnects connectors to form a bus network, and a termination resistor circuit of the bus network, a connector housing that houses the termination resistor circuit, and the connector And a joint connector that can be stacked and connected to the housing.

  In the on-vehicle multiplex communication termination circuit unit configured as described above, a required number of joint connectors can be stacked and connected to the connector housing in which the termination resistor circuit is housed. Therefore, even if the number of connected circuits changes, it can be easily handled by changing the number of joint connectors to be stacked. Moreover, since it is only necessary to connect the joint connectors, it can be made compact.

  2) In addition, the termination circuit unit for in-vehicle multiplex communication according to the present invention can be directly connected to a lock structure for connecting the stacked joint connectors to adjacent joint connectors and terminals of the adjacent joint connectors. And a tab portion.

  In the on-vehicle multiplex communication termination circuit unit configured as described above, the joint connectors are stacked and connected in a lock structure, and the terminals are directly electrically connected to each other by the tab portion provided on the joint connector terminals. it can. As a result, the required number of joint connectors can be easily connected to each other and can be made compact.

  3) In addition, the in-vehicle multiplex communication termination circuit unit according to the present invention includes a lock structure for connecting the stacked joint connectors to adjacent joint connectors, and a bus bar for connecting and connecting between terminals of the joint connectors. It is characterized by having.

  In the on-vehicle multiplex communication termination circuit unit configured in this way, the joint connectors are stacked and connected in a lock structure, and the bus bars are skewered to the stacked joint connectors to electrically connect each joint connector. Can connect. As a result, the required number of joint connectors can be easily connected directly and can be made compact.

  According to the present invention, even if the number of connected circuits is changed, it can be easily handled by changing the number of joint connectors to be stacked. Moreover, since it is only necessary to connect the joint connectors, it can be made compact.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view showing a first embodiment of an on-vehicle multiplex communication termination circuit unit according to the present invention, FIG. 2 is a cross-sectional view of the on-vehicle multiplex communication termination circuit unit, and FIG. 4 is an exploded perspective view showing an example of a termination resistor circuit, FIG. 5A is a perspective view showing a front surface of a joint connector, FIG. 5B is a perspective view showing a rear surface, and FIG. 6 is a connection terminal. 7A and 7B are explanatory views showing a connection procedure. FIG.

  As shown in FIGS. 1 and 2, the on-vehicle multiplex communication termination circuit unit 10 </ b> A according to the first embodiment of the present invention includes a connector housing 20 that houses a termination resistor circuit 30, and a plurality of connectors connected to the connector housing 20. (In this case, for example, three) hub-type joint connectors 40A that can be stacked and connected.

The connector housing 20 has an overall rectangular box shape made of insulating resin, has an internal space 21, and is provided with an opening 22 above.
A termination resistor circuit 30 is inserted into the internal space 21 from the opening 22. In the vicinity of the lower end of the side 20a of the connector housing 20 on the joining side (right side in FIG. 1), a lock hole 23 that is a locking structure for positioning and preventing the joint connector 40A joined to the connector housing 20 is a hub of the joint connector 40A. It is provided corresponding to the number (here three).
A fitting hole 24 is provided in the bottom surface 20 b corresponding to the lock hole 23. A connecting hole 25 for inserting a connecting protrusion 51 (see FIG. 6) as a terminal provided in the connecting terminal 50A of the joint connector 40A is provided above the lock hole 23 on the joining side surface 20a. It is provided corresponding to.

  As shown in FIG. 2, a planar female / female terminal 26 having an overall L shape is provided in the internal space 21. As shown in FIG. 3, the upper end of the female / female terminal 26 is a first female terminal for pushing and electrically connecting the terminal portion 36 (see FIG. 4) of the termination resistor circuit 30. A notch 26a is provided. Further, a second notch 26b, which is a female terminal for pushing in and electrically connecting the connecting projection 51 of the joint connector 40A, is provided at the right end of the female / female terminal 26 in FIG. Yes.

The termination resistance circuit 30 inserted into the internal space 21 of the connector housing 20 has a printed wiring board 34 on which a first resistor 31, a second resistor 32, and a capacitor 33 are mounted, for example, as shown in FIG. ing. The periphery of the first resistor 31, the second resistor 32, and the capacitor 33 is covered with an insulating housing 35, and a terminal portion 36 is provided so as to protrude.
Accordingly, the termination resistor circuit 30 is inserted into the internal space 21 from the opening 22 of the connector housing 20, and the terminal portion 36 of the termination resistor circuit 30 is pushed into the first notch 26 a of the female / female terminal 26 of the connector housing 20. To attach and connect.

As shown in FIGS. 5 and 2, the joint connector 40A has a rectangular shape made of an insulating resin, and a plurality of (for example, three) connector fittings for accommodating the connecting terminals 50A therein. A portion 42 is provided. As shown in FIG. 5A, an opening 43 is provided on the upper surface for inserting the connecting terminal 50A into the connector fitting portion 42, and a notch 44a is formed on the front surface 41a from the upper end to the lower center portion. Is provided.
Further, below the lower edge of the notch 44a, a lock protrusion 45 is provided to project forward as a lock structure for connecting to the adjacent joint connector 40A.
As shown in FIG. 2, a fitting protrusion 45a is provided on the front lower surface of the lock protrusion 45 to prevent the lock protrusion 45 from falling off.

As shown in FIG. 5 (B), a connection hole 44c into which the connecting protrusion 51 protruding from the adjacent joint connector 40A is inserted is provided on the rear surface 41b of the joint connector 40A.
Further, below the connection hole 44c, a lock hole 44b into which a lock protrusion 45 as a lock structure protruding from the adjacent joint connector 40A is inserted is provided.

FIG. 6 shows a connecting terminal 50A. As shown in FIGS. 6 and 2, a tongue-like connecting protrusion 51 for electrical connection with the terminal resistor circuit 30 and the adjacent joint connector 40A is provided in the front (near the lower end of the front surface of the connecting terminal 50A). It protrudes to the left side in FIG.
A connection hole 52 into which the connection protrusion 51 of the adjacent joint connector 40A is inserted is provided behind the connection protrusion 51 (on the right side in FIG. 6). In front of the connection hole 52, as shown in FIG. 2, a tab portion 54 that directly contacts the inserted connecting projection 51 is provided. An electric wire holding piece 53 for holding the electric wire W is provided on the upper portion of the connecting terminal 50A.
In addition, the electric wire W is electrically connected to the connecting terminal 50A by being in pressure contact with a pressure contact blade (not shown). The connecting terminal 50A can be easily manufactured by punching a conductive plate-like member into a predetermined shape and bending it.

As shown in FIG. 1, the connecting terminal 50A is inserted such that the connecting protrusion 50 descends from the opening 43 of the joint connector 40A along the notch 44a. For this reason, the width of the notch 44 a is set to be larger than the width of the connecting protrusion 51.
As a result, as shown in FIG. 2, the connection hole 52 provided in the connecting terminal 50A is positioned inside the connection hole 44c provided in the joint connector 40A.

Next, the connection operation will be described. As shown in FIG. 1, the termination resistor circuit 30 is inserted into the connector housing 20, and the terminal portion 36 is pushed into the first notch 26 a of the female / female terminal 26 to be connected.
Further, the connecting terminal 50A is inserted into each connector fitting portion 42 of the joint connector 40A.

Next, as shown in FIG. 7A, the connection protrusion 51 of the connection terminal 50A is inserted from the connection hole 44c provided in the rear surface 41b of the adjacent joint connector 40A, and the lock protrusion 45 is inserted into the lock hole. Insert and fix from 44b.
At this time, the plurality of joint connectors 40A are connected to each other so that a required number of connector fitting portions 42 are obtained. Similarly, the connecting protrusion 51 is inserted from the connection hole 25 of the connector housing 20 and pushed into the second notch 26 b of the female / female terminal 26 to be connected, and the lock protrusion 45 is connected to the lock hole 23 of the connector housing 20. And then fixed (see FIG. 7B).

As described above, according to the above-described on-vehicle multiplex communication termination circuit unit 10A, the joint connector 40A is connected according to the number of required connector fitting portions 42, so that even if the number of connected circuits changes, it can be easily handled. it can.
Moreover, since it is only necessary to connect the joint connectors 40A to each other, the useless connector fitting portion 42 can be reduced and the size can be reduced.

Next, a second embodiment of the on-vehicle multiplex communication termination circuit unit according to the present invention will be described. 8 is an exploded perspective view showing a second embodiment of the termination circuit unit for in-vehicle multiplex communication according to the present invention, FIG. 9 is a cross-sectional view of the termination circuit unit for in-vehicle multiplex communication, and FIG. FIG. 10B is a perspective view showing the rear surface, FIG. 11 is a perspective view seen from the back of the skewering terminal, and FIGS. 12A and 12B are explanatory diagrams showing the connection procedure. .
In addition, the same code | symbol is attached | subjected to the site | part which is common in the case of 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 8 and 9, the on-vehicle multiplex communication termination circuit unit 10 </ b> B according to the second embodiment of the present invention includes a connector housing 20 that houses the termination resistor circuit 30, and a plurality of connectors connected to the connector housing 20. (In this case, for example, three) hub-type joint connectors 40B that can be stacked and connected. Moreover, the bus bar 60 for skewers which is a bus bar for connecting the connector housing 20 and each joint connector 40B electrically integrally is provided.

As shown in FIGS. 10 and 9, the joint connector 40 </ b> B has a rectangular shape made of an insulating resin, and a plurality of joint connectors 40 </ b> B for accommodating skewer terminals 50 </ b> B (see FIGS. 9 and 11) as terminals therein. There are three (for example, three) connector fitting portions 42. As shown in FIG. 10A, an opening 43 is provided on the upper surface of the joint connector 40B in order to insert the skewering terminal 50B into the connector fitting portion.
Further, a skewer piece 61 of a skewer bus bar 60 passes through the front surface 41a of the joint connector 40B in order to connect the adjacent joint connector 40B and the connector housing 20 through the skewer terminal 50B. An insertion hole 44d is provided. A lock protrusion 45 is provided below the skewer hole 44d as a lock structure so as to protrude forward.

As shown in FIG. 10B, the rear surface 41b of the joint connector 40B is provided with a connection hole 44c into which the skewer piece 61 of the skewer bus bar 60 passing through the adjacent joint connector 40B is inserted. Yes.
A lock hole 44b into which the lock protrusion 45 of the adjacent joint connector 40B is inserted is provided below the connection hole 44c.

FIG. 11 shows a skewer terminal 50B. As shown in FIGS. 11 and 9, a connection hole 52 for inserting a skewer piece 61 from an adjacent joint connector 50B is provided near the lower end of the skewer terminal 50B.
As shown in FIG. 9, a tab portion 54 is provided in front of the connection hole 52 for direct electrical contact with the inserted skewer piece 61 interposed therebetween. In addition, an electric wire holding piece 53 for holding the electric wire W is provided on the upper portion of the connecting terminal 50B.

Next, the connection operation will be described. As shown in FIG. 8, the termination resistor circuit 30 is inserted into the connector housing 20, and the terminal portion 36 is pushed into the first notch 26 a of the female / female terminal 26 to be connected.
Further, the skewer terminal 50B is inserted into each connector fitting portion 42 of the joint connector 40B.

Next, as shown in FIG. 12A, the lock protrusion 45 is inserted into the lock hole 44b of the adjacent joint connector 40B, and the joint connectors 40B are fixed integrally.
At this time, the plurality of joint connectors 40B are connected to each other so that a necessary number of connector fitting portions 42 are obtained. The lock protrusion 45 of the foremost joint connector 40B is inserted from the lock hole 23 of the connector housing 20, and the connector housing 20 and each joint connector 40B are joined.
Then, the skewer piece 61 of the skewer bus bar 60 is inserted from the connection hole 44c of the last joint connector 40B, passes through the tab portion 54 of each joint connector 40B, and from the connection hole 25 of the connector housing 20 It is inserted and pushed into the second notch 26b of the female / female terminal 26 for connection (see FIG. 12B).

  As described above, according to the on-vehicle multiplex communication termination circuit unit 10B described above, since the joint connector 40B is connected according to the number of required connector fitting portions 42, even if the number of connected circuits is changed, it can be easily handled. it can. Moreover, since it is only necessary to connect the joint connectors 40B to each other, the useless connector fitting portion 42 can be reduced and the size can be reduced.

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, first, a case has been described in which a plurality of necessary joint connectors 40A and 40B are connected to each other, and then the joint connectors 40A and 40B are connected to the connector housing 20. However, the present invention is not limited thereto. Absent. Further, the joint connectors 40 </ b> A and 40 </ b> B may be sequentially connected to the connector housing 20. Further, the termination resistor circuit 30 may be inserted and connected to the connector housing 20 last.

Moreover, in each embodiment mentioned above, although joint connector 40A, 40B which has the three connector fitting parts 42 was employ | adopted as a unit, the number of the connector fitting parts 42 is not restricted to this.
Moreover, although the case where the lock protrusion 45 was provided as a lock structure was demonstrated, it does not restrict to this. In order to further strengthen the positioning and locking of each joint connector 40A, 40B, for example, the joint connector 40A, 40B may be provided on the upper part of the joint connector 40A, 40B.

1 is an exploded perspective view showing a first embodiment of a termination circuit unit for in-vehicle multiplex communication according to the present invention. It is sectional drawing of the termination circuit unit for vehicle-mounted multiple communication. It is a front view of the female-female terminal of a connector housing. It is a disassembled perspective view which shows an example of a termination resistance circuit. (A) is a perspective view which shows the front surface of a joint connector, (B) is a perspective view which shows a rear surface. It is the perspective view seen from the back of the terminal for connection. (A), (B) is explanatory drawing which shows the procedure of a connection. It is a disassembled perspective view which shows 2nd Embodiment of the termination circuit unit for vehicle-mounted multiplex communication which concerns on this invention. It is a front view of the female-female terminal of a connector housing. It is a disassembled perspective view which shows an example of a termination resistance circuit. It is the perspective view seen from the back of the terminal for skewers. (A), (B) is explanatory drawing which shows the procedure of a connection. 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 On-vehicle multiplex communication termination circuit unit 20 Connector housing 23, 44b Lock hole (lock structure)
30 Terminating resistor circuit 40A, 40B Joint connector 45 Lock protrusion (lock structure)
50A Connection terminal (terminal)
50B skewer terminal (terminal)
54 Tab part 60 Bus bar for skewers (Bus bar)

Claims (3)

A plurality of hub-type joint connectors each connected to each terminal communication device, a bus line that interconnects these terminal communication devices and the joint connector to form a bus network, and a termination resistor circuit for the bus network An in-vehicle multiplex communication device comprising:
An in-vehicle multiplex communication termination circuit unit comprising: a connector housing that houses the termination resistor circuit; and a joint connector that is connectable to the connector housing.   The on-vehicle unit according to claim 1, wherein the joint connector to be stacked has a lock structure for connecting to an adjacent joint connector and a tab portion that can be directly connected to a terminal of the adjacent joint connector. Termination circuit unit for multiple communications.   2. The on-vehicle multiplex communication according to claim 1, wherein the joint connectors to be stacked have a lock structure for connecting to adjacent joint connectors and a bus bar for connecting and connecting between terminals of the joint connectors. Termination circuit unit.

Images