JP4622995B2 - Electronic control unit - Google Patents

Description

  The present invention relates to an electronic control device.

  Conventionally, for example, Patent Document 1 is disclosed as a structure of a connector that is mounted on a circuit board and constitutes an electronic control device together with the circuit board.

In Patent Document 1, a plurality of insertion mounting type contacts (terminals) disposed in an insulating housing are grouped into module blocks. Then, as a plurality of module block groups arranged in the longitudinal direction of the housing, a module block composed of a plurality of power transmission contacts (power terminals) is arranged at both ends and sandwiched between the power transmission contact module blocks. A module block including a plurality of signal transmission contacts (signal terminals) is arranged.
JP 2000-173697 A

  By the way, in order to reduce the size of the electronic control device in the plane direction of the circuit board, the contact is generally not only in one direction along the plane of the circuit board with respect to the housing but also perpendicular to the plane of the board. It is also arranged in multiple stages in the direction. In addition, the length of the leg portion exposed from the housing (the side exposed from the housing and electrically connected to the circuit board) is generally smaller than the contact on the lower side (circuit board side) in the direction perpendicular to the board plane. Set short. Further, since the power transmission contact transmits a signal to the power element such as a power transistor (a large current flows), the terminal diameter is set to be larger than that of the signal transmission contact.

  In the configuration shown in Patent Document 1, all of the module blocks are made up of power transmission contacts, and the power transmission contacts are arranged in multiple stages from the lowermost stage on the circuit board side to the uppermost stage farthest from the circuit board. Yes. The power transmission contact arranged on the lower side has a large terminal diameter and a short leg length, so it has higher rigidity than the power transmission contact arranged on the upper side and the signal transmission contact on the same stage. Resistant to elastic deformation. As described above, when the power transmission contact is disposed on the lower side, the ability to relieve stress or the like based on the difference in linear expansion coefficient between the housing and the circuit board is low. Cracks are likely to occur in the solder joints.

  The lead-out wiring from the land corresponding to the power transmission contact is thicker than the lead-out wiring connected to the land corresponding to the signal transmission contact. Therefore, when the power transmission contact is arranged on the lower side, the degree of freedom of drawing the wiring in the direction away from the land from the housing is low.

  In view of the above problems, an object of the present invention is to provide an electronic control device capable of improving connection reliability and wiring flexibility.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a circuit board and a terminal having one end connected to a land of the circuit board and the other end connected to an external connector. An electronic control device comprising a plurality of connectors arranged in a direction along a plane and in a direction perpendicular to the plane, wherein a plurality of first terminals and a plurality of first terminals having a terminal diameter larger than the first terminals are provided as terminals. 2 terminals, and the terminals are located on the side close to the circuit board in accordance with the step position in the direction perpendicular to the plane of the circuit board, where the length of the leg portion, which is the part exposed from the housing connected to the land, The connector has a short length, and the connector has a first terminal block in which only a plurality of first terminals are collected in a terminal arrangement direction along the plane of the circuit board, a plurality of first terminals, and a plurality of second terminals. A second terminal block in which terminals are gathered; , Each having at least one terminal block for connection to an external connector, and the second terminal block is the furthest away from the circuit board among the terminals arranged in a plurality of stages in a direction perpendicular to the plane of the circuit board two-stage between top and lower adjacent top is the second terminal, lower than the second terminal including a bottom of at least the circuit board side Ri Ah in the first terminal, perpendicular to the plane of the circuit board In this direction, the first terminals constituting the second terminal block are arranged at the same height as the first terminals constituting the first terminal block at the same stage as the first terminals, and constitute the first terminal block. The second stage second terminals constituting the second terminal block are arranged in the portion corresponding to the first stage three stages including the uppermost stage farthest from the circuit board .

As described above, according to the present invention, in the second terminal block, the two stages including the uppermost stage are the second terminals, so that the leg exposed from the housing is in the lower stage even though the terminal diameter is thicker than the first terminal. For example, even if a stress is generated based on the difference in linear expansion coefficient between the housing and the circuit board, cracks or the like are unlikely to occur at the solder joint between the second terminal and the corresponding land. Further, when the lower stage of the second terminal is the first terminal, the leg diameter exposed from the housing is shorter than the case where the leg part is arranged on the upper stage, but the terminal diameter is smaller than that of the second terminal. Even if stress is generated based on the difference, a crack or the like is unlikely to occur at the solder joint between the first terminal and the corresponding land. That is, the connection reliability can be improved while the configuration includes the second terminal having a larger diameter than the first terminal. Further, if the number of stages of the second terminals in the second terminal block is three or more, there are a plurality of second terminals below the uppermost stage, so that a plurality of second terminals are disposed between adjacent lands corresponding to the second terminals. The interval through which the wiring corresponding to the terminal passes is increased and / or the degree of freedom of wiring is reduced. On the other hand, according to the present invention, since the second terminals are arranged in two stages, it is possible to suppress an increase in the interval between adjacent lands and a decrease in the degree of freedom of wiring.

  In addition, since the second terminal is positioned above the first terminal, the land corresponding to the second terminal is provided at a position farther from the housing than the land corresponding to the first terminal on the circuit board. With such a configuration, it is possible to reduce the number of wires connected to the lands corresponding to the second terminals in the separation direction through the lands corresponding to the terminals constituting the second terminal block. Therefore, it is possible to improve the degree of freedom of drawing the wiring in the direction away from the land in the plane direction of the circuit board.

In addition, since the second terminals are arranged in two stages in the second terminal block, the necessary number of second terminals can be ensured in a shorter distance than in the one-stage arrangement in the terminal arrangement direction. That is, the electronic control device can be reduced in size in the plane direction of the circuit board.

  In addition, since the first terminal block is provided, land placement and wiring extraction from the land in the first terminal block is made more efficient than making all the terminal blocks connected to one external connector the second terminal block. can do.

  Further, the plurality of terminal blocks provided for connection with the external connector are divided into the above-described second terminal block and the first terminal block in which only the plurality of first terminals are collected. Therefore, when wiring is passed between lands corresponding to the second terminals, the first terminals that are affected by, for example, noise are arranged in the first terminal block, and the first terminals that are less affected are arranged in the second terminal block. You can also

  The connector only needs to have at least one first terminal block and at least one second terminal block as terminal blocks provided for connection to the external connector, and the number of external connectors to be fitted is particularly limited. It is not something. For example, it is good also as a structure which has multiple 1st terminal blocks and 2nd terminal blocks as a terminal block provided for the connection with one external connector. Moreover, it is good also as a structure which has two or more 1st terminal blocks and 2nd terminal blocks as a terminal block connected with a some external connector, respectively.

According to a second aspect of the present invention, the lands on one surface of the circuit board corresponding to the terminals are preferably arranged in a staggered manner.

  In the first or second aspect of the invention, as in the third aspect of the invention, for example, the circuit board has a plurality of through holes respectively corresponding to the plurality of terminals, and the land is a wall surface of the through hole and the periphery of the opening. It can be employed for a so-called terminal insertion mounting structure that is electrically connected to the land via solder in a state where the terminal is inserted into the through hole. In addition, it is also possible to employ a so-called terminal surface mounting structure.

  In the invention described in claim 3, as described in claim 4, the connector is arranged at one end of the circuit board so that the terminal arrangement direction along the plane of the circuit board is parallel to one end of the circuit board. It is preferable that the first terminal block and the second terminal block have the same distance between the land corresponding to the uppermost terminal farthest from the circuit board and one end of the circuit board.

  With such a configuration, when the terminals and lands are solder-bonded by jet soldering, all the terminals of the first terminal block and the second terminal block can be jet soldered together. It is also possible to reduce the mounting prohibition area of the electronic component exposed to the jet solder.

  The distance between the land corresponding to the uppermost terminal farthest from the circuit board and the one end of the circuit board is equal between the first terminal block and the second terminal block is not limited to perfect match, but is almost equal. It shows the state. For example, in the land corresponding to the first terminal block and the land corresponding to the second terminal block, one end of the circuit board and the end on the same side with respect to the connector of each land (for example, the end on the side far from the connector) The distance between the one end of the circuit board and the center of each land may be equal to each other. Also, the distance between the end of the land corresponding to one terminal block and one end of the circuit board may be equal to the distance between the center of the land corresponding to the other terminal block and one end of the circuit board. In other words, the land corresponding to the first terminal block and the land corresponding to the second terminal block may overlap with each other in the direction away from the housing.

  In invention of any one of Claims 1-4, as described in Claim 5, the 1st terminal which comprises a 2nd terminal block is a 1st terminal which comprises a 1st terminal block, It is preferable to have a configuration having the same shape as the first terminal of the same stage from the circuit board side. With such a configuration, the types of terminals can be reduced and the manufacturing cost can be reduced.

  In the invention according to any one of claims 1 to 5, as described in claim 6, the first terminal is a signal terminal for signal transmission, and the second terminal is a power terminal for power transmission. It is good also as a structure.

  Even in such a configuration, as described above, connection reliability and wiring flexibility can be improved. Also, among the first terminals, a first terminal that transmits an analog signal that is easily affected by noise from a large current signal when a wiring is passed between lands corresponding to the power terminals is defined as a first terminal block. By using the second terminal block as the first terminal that transmits a digital signal that is less affected by noise, a configuration that is less susceptible to noise can be achieved.

  In the invention described in claim 6, as described in claim 7, in the terminal arrangement direction along the plane of the circuit board, at least one end of the plurality of terminal blocks may be the second terminal block. . More preferably, as described in claim 8, both end portions of the plurality of terminal blocks may be the second terminal blocks.

  Generally, a power element in which a power terminal is electrically connected via a land and a wiring is from the viewpoint of heat dissipation (shortening the heat radiation distance to the outside and reducing the influence of heat radiation to other components (elements)), Generally, the circuit board is disposed near the edge. Therefore, if it is set as the structure of Claim 7 or Claim 8, wiring can be simplified.

  In the invention according to any one of claims 6 to 8, as described in claim 9, the second adjacent to each other in the land on the one surface of the circuit board corresponding to the terminals constituting the second terminal block. It is preferable that the distance between the lands corresponding to the terminals and the first terminal is wider than the distance between the lands corresponding to the first terminals adjacent to each other.

  With such a configuration, although the first terminal (signal terminal) and the second terminal (power terminal) are mixed, the influence of noise can be reduced. In addition, since the length of the leg portion of the second terminal is increased by the distance between the lands corresponding to the second terminal and the first terminal, connection reliability can be improved.

  In the invention according to any one of claims 1 to 9, as described in claim 10, in the portion of the surface of the circuit board of the land corresponding to the terminals constituting the second terminal block, the second The lands corresponding to the terminals are arranged in a staggered manner, and the distance between the lands corresponding to the adjacent second terminals of the same stage is wider than the distance between the lands corresponding to the adjacent second terminals of the adjacent stages. A configuration is good.

  In this way, the land area of the circuit board corresponding to the second terminal block is reduced by narrowing the land between which the wiring does not pass between the lands where the wiring passes between the lands where the wiring does not occur. be able to.

  In the invention described in any one of claims 1 to 10, as described in claim 11, in the land on one surface of the circuit board corresponding to the terminals constituting the first terminal block, it corresponds to the first terminal. It is preferable that the lands to be arranged are arranged in a staggered manner and the intervals between a plurality of adjacent lands on the upper stage side through which the wiring from the land corresponding to the first terminal on the lower stage side is passed are equal. In this way, by equalizing the distance between the lands, the land area of the circuit board corresponding to the first terminal block can be reduced.

  It should be noted that the interval between the adjacent lands on the upper stage side through which the wiring from the land corresponding to the first terminal on the lower stage side is passed is not the same, but is almost equal (tolerance deviation is allowed) Status).

  Moreover, in invention of any one of Claims 1-11, in the land of the one surface of the circuit board corresponding to the terminal which comprises a 1st terminal block, as described in Claim 12, 1st terminal The lands corresponding to are arranged in a staggered pattern, and the distance between adjacent lands between which the wiring from different lands is not passed is the distance between the lands where the wiring from different lands is passed. A narrower configuration is preferable. With such a configuration, the land area of the circuit board corresponding to the first terminal block can be further reduced.

  In the invention described in any one of the first to twelfth aspects, as described in the thirteenth aspect, in the terminal arrangement direction, the land block corresponding to each terminal block has an area without a land in between. It is preferable to have a configuration in which the width of the region without land is substantially constant along the plane of the circuit board and in the direction perpendicular to the terminal arrangement direction. As described above, when the lands are arranged so that the interval between the blocks is substantially constant in the direction perpendicular to the terminal arrangement direction, the wiring from the lands can be efficiently drawn out in the area without the lands.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is an exploded view illustrating a schematic configuration of the electronic control device according to the first embodiment of the present invention before assembly. FIG. 2 is a plan view of the periphery of the mounting portion in a state where the connector is mounted on the circuit board. FIG. 3 is a plan view of the state in which the connector is mounted on the circuit board as viewed from the connection side with the external connector. 4 is a cross-sectional view taken along line IV-IV shown in FIG. In FIG. 4, for convenience, wiring including lands and solder are omitted.

  The electronic control device shown in the present embodiment is a non-waterproof electronic control device, and is used, for example, as an engine ECU (Electric Control Unit) of a vehicle.

  As shown in FIG. 1, the electronic control device 100 includes a circuit board 30 and a connector 50 mounted on the circuit board 30 as main parts. In the present embodiment, in addition to this, a housing 10 that accommodates part of the circuit board 30 and the connector 50 is included.

  The housing 10 is made of a metal material such as aluminum or iron or a synthetic resin material, and accommodates part of the circuit board 30 and the connector 50. The number of constituent members of the housing 10 is not particularly limited, and may be configured from one member or a plurality of members. In the present embodiment, as shown in FIG. 1, it is constituted by two members, a box-shaped case 11 with one side opened and a shallow cover 12 with a substantially rectangular plate shape that closes the open surface of the case 11. Is done. Then, by assembling the case 11 and the cover 12, the housing 10 having an internal space that accommodates part of the circuit board 30 and the connector 50 is configured. Further, the case 11 and the cover 12 are fixed by screw fastening (not shown).

  As shown in FIG. 1, the circuit board 30 includes a microcomputer on a printed board 31 formed with wiring including lands as electrodes, via holes connecting the wirings, through holes into which the terminals 51 of the connector 50 are inserted, and the like. The electronic component 32 such as a power transistor, a resistor, and a capacitor is mounted. As a constituent material of the printed circuit board 31, a known material such as a thermoplastic resin, a thermosetting resin, ceramic, a composite of glass (for example, a glass cloth) and a resin, or the like can be applied. Also, the number of layers is not particularly limited. In the present embodiment, a double-sided substrate using a glass epoxy resin as a constituent material is employed. The arrangement of lands and through holes corresponding to the terminals 51 of the connector 50 on the printed circuit board 31 will be described later. A connector 50 that electrically connects the circuit board 30 and the outside is mounted on the printed board 31. Specifically, the connector 50 is located near one end of the circuit board 30 so that the arrangement direction of the terminals 51 (longitudinal direction of the housing 52) along the plane of the circuit board 30 is parallel to one end of the circuit board 30. Has been placed.

  The connector 50 includes a plurality of terminals 51 made of a conductive material (in this embodiment, brass is metal-plated) in a direction along the plane of the printed circuit board 31 (circuit board 30) with respect to the housing 52 made of an insulating material (this In the embodiment, the flat rectangular housing 52 is disposed in the longitudinal direction) and in a direction perpendicular to the plane. As the connector 50 having such a configuration, a so-called punched terminal 51 bent in advance into a predetermined shape is integrated with the housing 52 by insert molding, or a so-called bent terminal 51 is provided with a hole provided in the housing 52. It is possible to adopt a structure that is inserted into the case and then bent.

  The terminal 51 has a length on one end side of a portion exposed from the housing 52 on the side connected to the land in a direction perpendicular to the plane, according to the step position in the direction perpendicular to the plane of the printed board 31. The side closer to 31 has a shorter length. One end side of the exposed portion extending from the housing 52 is soldered to the land of the printed circuit board 31, and the other end side is exposed to the outside of the housing 10 and is electrically connected to the external connector. ing. In the present embodiment, in a state where the terminal 51 is inserted into the through hole provided in the printed circuit board 31, the terminal 51 is soldered to the land provided on the wall surface of the through hole and around the opening. That is, an insertion mounting type connector is employed as the connector 50. The housing 10 (case 11) is provided with a connector notch (not shown) corresponding to the connector 50, and the case 11 and the cover 12 are screwed together so as to accommodate the circuit board 30. Thus, a part of the connector 50 (including the connection side of the terminal 51 to the printed circuit board 31) is accommodated in the casing 10, and the remaining part (including the connection side of the terminal 51 to the external connector) is stored in the casing 10. Exposed outside.

  Further, the connector 50 includes a plurality of types of terminals having different diameters as the terminals 51. As shown in FIGS. 1 to 4, the present embodiment includes two types of terminals 51, a first terminal 53 having a small diameter and a second terminal 54 having a diameter larger than that of the first terminal 53. The terminal 53 is used as a so-called signal terminal for signal transmission, and the second terminal 54 is used as a so-called power terminal for power transmission (electrically connected to a power element and transmitting a large current).

  Further, the connector 50 includes a first terminal block 55 in which only the plurality of first terminals 53 are collected in the arrangement direction of the terminals 51 along the plane of the printed circuit board 31 (longitudinal direction of the housing 52), and a plurality of first terminals. At least one terminal block and a second terminal block 56 in which a plurality of second terminals 54 are gathered are provided as terminal blocks used for connection with an external connector. The connector 50 according to this embodiment is connected to four external connectors that are electrically connected to each engine-related system. As shown in FIGS. One first terminal block 55 and two second terminal blocks 56 are provided. As shown in FIG. 3, the terminal blocks 55 and 56 are separated by the housing 52 on the connection side with the external connector. Therefore, the warp of the housing 52 can be reduced in the longitudinal direction of the housing 52.

  As described above, when the first terminal block 55 and the second terminal block 56 are used as the plurality of terminal blocks provided for connection to the external connector, for example, noise from a large current signal flowing through the second terminal 54 is reduced. In consideration of the influence, the first terminals 53 for signal transmission can be distributed. In the present embodiment, the first terminal 53 includes a first terminal 53 that transmits an analog signal (knock sensor signal or other analog sensor signal) that is susceptible to noise, among the first terminals 53, so that the digital signal is less susceptible to noise. A first terminal 53 for transmitting a signal is included in the second terminal block 56. This point will be additionally described in the arrangement of lands and through holes of the printed circuit board 31 described later.

  In the land corresponding to the second terminal block 56, the land is arranged in consideration of the difference in terminal diameter between the first terminal 53 and the second terminal 54, the influence of the noise described above, or the wiring from the land. It is necessary to pull out. On the other hand, in the land corresponding to the first terminal block 55, there are few (or no) restrictions as in the second terminal block 56, so that the land placement and the wiring extraction from the land are made efficient. Can do. In other words, by having the first terminal block 55 together with the second terminal block 56, the size of the electronic control device 100 in the planar direction of the circuit board 30 can be reduced. This point will be additionally described in the arrangement of lands and through holes of the printed circuit board 31 to be described later.

  Further, in the arrangement direction of the terminals 51 along the plane of the printed circuit board 31, the arrangement of a plurality of terminal blocks provided for connection with an external connector (how to arrange the first terminal block 55 and the second terminal block 56) is particularly limited. Is not to be done. In the present embodiment, as shown in FIGS. 2 and 3, the second terminal block 56 is configured at both ends of the four terminal blocks 55, 56, and the first region is located in the central region sandwiched between the second terminal blocks 56. A terminal block 55 is configured. In general, a power element in which power terminals are electrically connected via lands and wirings has a heat dissipation viewpoint (an effect of heat dissipation to the outside of the electronic control device 100 and a reduction in heat dissipation distance to the outside of the electronic control device 100 and other components (elements)). Reduced), the circuit board 30 is disposed near the edge. Therefore, if at least one end of the plurality of terminal blocks 55 and 56 is the second terminal block 56 in the arrangement direction of the terminal 51 along the plane of the printed circuit board 31, the land and power element corresponding to the second terminal 54 are provided. The wiring pattern for electrically connecting the two can be simplified.

  As shown in FIG. 3, the first terminal block 55 is configured by arranging a plurality of first terminals 53 in a staggered manner with respect to the housing 52. Specifically, a plurality are arranged in a direction along the plane of the printed circuit board 31 (longitudinal direction of the housing 52), and are arranged in multiple stages in a direction perpendicular to the plane of the printed circuit board 31. The number of first terminals 53 arranged in the direction along the plane of the printed circuit board 31 and in the direction perpendicular to the plane of the printed circuit board 31 is not particularly limited. In the present embodiment, in the two first terminal blocks 55, the first terminals 53 are arranged in five stages in a direction perpendicular to the plane of the printed circuit board 31, and one of the four terminals 4 in the direction along the plane of the printed circuit board 31. Five books and the other are arranged.

  As shown in FIG. 3, the second terminal block 56 is configured by arranging a plurality of first terminals 53 and a plurality of second terminals 54 in a staggered manner with respect to the housing 52. Of the terminals 51 arranged in multiple stages in the direction perpendicular to the plane of the printed circuit board 31, the second terminals 54 are arranged in a plurality of stages from the uppermost stage farthest from the printed circuit board 31, and at least on the printed circuit board 31 side. The first terminal is arranged at a lower stage than the second terminal including the lowermost stage (first stage). In the present embodiment, as shown in FIGS. 3 and 4, the terminals 51 (first terminal 53 and second terminal 54) are in a direction perpendicular to the plane of the printed circuit board 31 in the two second terminal blocks 56. Each of the four stages is arranged, and the second terminal 54 is arranged in two stages, the uppermost stage (fourth stage) and the lower stage (third stage) adjacent to the uppermost stage, and the lowermost stage (first stage) and the upper stage (2). The first terminals 53 are arranged in the second stage.

  Thus, in the second terminal block 56, if a plurality of stages from the uppermost stage are the second terminals 54, the terminal diameter is larger than the first terminal 53 but exposed from the housing 52 as shown in FIG. 4, for example. Since the leg portion is long (longer than the first terminal 53 arranged in the lower stage), for example, even if stress is generated based on the difference in linear expansion coefficient between the housing 52 and the printed circuit board 31, it corresponds to the second terminal 54. Cracks are less likely to occur at solder joints with lands. If the lower stage of the second terminal 54 is the first terminal 53, the leg exposed from the housing 52 is short (shorter than the second terminal 54 arranged in the upper stage), but the terminal diameter is smaller than that of the second terminal 54. For example, even if stress is generated based on the above-described difference in linear expansion coefficient, cracks and the like are unlikely to occur at the solder joint between the first terminal 53 and the corresponding land. That is, the connection reliability can be improved while the second terminal 54 having a diameter larger than that of the first terminal 53 is included.

  In the second terminal block 56, since the second terminals 54 are arranged in a plurality of stages, the necessary number of second terminals in the arrangement direction of the terminals 51 (longitudinal direction of the housing 52) at a shorter distance than the one-stage arrangement. 54 can be secured. That is, the electronic control device 100 can be downsized in the plane direction of the printed circuit board 31. If the number of stages of the second terminals 54 in the second terminal block 56 is three or more, a plurality of stages of second terminals 54 exist below the uppermost stage, and therefore the land corresponding to the second terminal 54 on the upper stage side. In the meantime, in order to pass a plurality of thick wires corresponding to the second terminal 54 on the lower stage side, it is also conceivable to increase the interval between the lands. In addition, when the wiring corresponding to the second terminal 54 on the lower stage side is pulled out in the direction away from the housing 52, the second terminals 54 on the upper stage side of the wiring are obstructive (the degree of freedom in wiring is low). It is also possible to decrease. On the other hand, as shown in this embodiment, when the second terminal 54 is arranged in two stages of the second terminal block 56, that is, the uppermost stage and the lower stage adjacent to the uppermost stage, it is more than the uppermost stage. Since there is only one second terminal 54 at the lower stage, the required number of second terminals 54 can be secured at a short distance, and the degree of freedom in wiring is improved over the arrangement of three or more stages, and / or the circuit board. The electronic control device 100 in the 30 plane directions can be reduced in size.

  Further, if the second terminal 54 is positioned above the first terminal 53, for example, as shown in FIG. 4, in the circuit board 30, the land corresponding to the second terminal 54 is more housing than the land corresponding to the first terminal 53. It will be provided at a position away from 52. Therefore, it is possible to reduce the number of thick wires connected to the lands corresponding to the second terminals 54 in the direction away from the lands corresponding to the terminals 51 constituting the second terminal block 56. Therefore, the degree of freedom in drawing out the wiring in the direction away from the direction can be improved. This point will be additionally described in the arrangement of lands and through holes of the printed circuit board 31 described later.

  In the present embodiment, the first terminal 53 that constitutes the second terminal block 56 is the first terminal 53 that constitutes the first terminal block 55, and the same stage from the circuit board 30 side (in this embodiment, , Each of the first stage and the second stage) has the same shape as the first terminal 53. That is, the same type of terminal 51 is used. With such a configuration, the types of terminals 51 can be reduced, and the manufacturing cost can be reduced.

  Reference numeral 57 shown in FIGS. 1, 2, and 4 is a portion of each terminal 51 (first terminal 53 and second terminal 54) that extends from the housing 52 and is mounted on the circuit board 30. Is an alignment plate (so-called tine plate) for positioning with respect to the corresponding through hole. A part of the alignment plate 57 is fixed to the housing 52, and each terminal 51 (the first terminal 53 and the second terminal 54) is inserted through a corresponding through hole 58 provided in the alignment plate 57. For example, as shown in FIG. 4, it is inserted into a through hole (through hole) 33 provided in the printed circuit board 31 from its tip and soldered. As shown in FIG. 4, reference numeral 34 denotes a first through hole 34 into which the first terminal 53 is inserted, and reference numeral 35 denotes a second through hole 35 into which the second terminal 54 is inserted. is there. In this embodiment, the connector 50 has an insertion mounting structure, and has an alignment plate 57 to facilitate insertion of the corresponding terminal 51 into the through hole 33 and prevent terminal bending during conveyance. Although the configuration is shown, a configuration without the alignment plate 57 may be used. Further, the alignment plate 57 may be configured not to be fixed to the housing 52.

  Next, the arrangement of the through holes 33 and lands in the circuit board 30 (printed circuit board 31) corresponding to the configuration of the terminals 51 of the connector 50 described above will be described with reference to FIGS. FIG. 5 is a plan view of the periphery of the connector mounting portion of the circuit board in a state before the connector is mounted. FIG. 6 is an enlarged plan view showing the connector mounting surface side of the first land block in FIG. 5. FIG. 7 is an enlarged plan view seen from the connector mounting surface side showing the anti-connector mounting surface side of the first land block in FIG. 5. FIG. 8 is an enlarged plan view showing the connector mounting surface side of the second land block in FIG. 5. FIG. 9 is an enlarged plan view seen from the connector mounting surface side showing the anti-connector mounting surface side of the second land block in FIG. 5. In FIG. 5, the wiring is omitted for convenience.

  As shown in FIG. 5, the printed board 31 (circuit board 30) has a plurality of through holes 33 (first through holes) corresponding to the terminals 51 (first terminal 53 and second terminal 54) of the connector 50 described above. A hole 34 and a second through hole 35) are provided. A first land 36 as an electrode electrically connected to the corresponding first terminal 53 is provided on the side surface of the first through hole 34 and the surface of the printed circuit board 31 around the opening. A second land 37 as an electrode electrically connected to the corresponding second terminal 54 is provided on the side surface of the second through hole 35 and the surface of the printed circuit board 31 around the opening. A plurality of land blocks are configured corresponding to the terminal blocks configured in the connector 50.

  Specifically, as shown in FIG. 5, a first land block 38 including only the first through hole 34 and the first land 36 is configured corresponding to the first terminal block 55 including only the first terminal 53. ing. The second land block including the first through hole 34 and the first land 36, the second through hole 35 and the second land 37 corresponding to the second terminal block 56 including the first terminal 53 and the second terminal 54. 39 is configured. That is, as the plurality of land blocks 38, 39, two first land blocks 38 and two second land blocks 39 are provided, and in the longitudinal direction of the housing 52, as shown in FIG. A block 39 is configured, and a first land block 38 is configured in a central region sandwiched between the second land blocks 39. The plurality of land blocks 38 and 39 are provided in a region 40 (hereinafter referred to as “there is no through hole 34, 35” and the land 36, 37) in order to draw out the wiring from the lands 36, 37 in the direction away from the housing 52. (Shown as a gap region 40). In the present embodiment, as indicated by a broken line in FIG. 5, among the three gap areas 40 configured between the adjacent land blocks 38 and 39, in the two gap areas 40 in the short direction of the housing 52, The width of the gap region 40 is substantially constant. When the width of the gap area 40 varies in the short direction of the housing 52 as in the remaining gap area 40, the narrowest part eventually becomes the rate-limiting part, and the wide part is wasted. On the other hand, if the width of the gap region 40 is substantially constant, the wiring can be efficiently drawn from the lands 36 and 37 in the gap region 40. Therefore, it is preferable to consider the arrangement of the terminals 51 in the connector 50 and the arrangement of the through holes 33 corresponding to the terminals 51 so that the width of the gap region 40 is substantially constant. In the present embodiment, the gap between the first land block 38 and the second land block 39 adjacent to each other is such that the first land 36 is hardly affected by noise from a large current signal flowing through the second land 37. The width of the area 40 is set.

  As described above, the first land block 38 includes the first through hole 34 and the first land provided in the printed circuit board 31 corresponding to the first terminal block 55 in the mounting portion of the printed circuit board 31 with the connector 50. It is a part including only 36. In the plane direction of the printed circuit board 31, the interval between the plurality of first lands 36 is set to a distance at which a bridge is not generated (not short-circuited) between the first lands 36 at least by jet soldering.

  Further, in the present embodiment, as shown in FIGS. 6 and 7, a plurality of first through holes 34 and first lands 36 ensure a distance that does not cause a short circuit on both surfaces of the printed board 31 that is a double-sided board. However, it is a regular staggered arrangement. In this regular zigzag arrangement, the wiring 52 connected to the lower first land 36 is routed between the first lands 36 on the upper stage side of the housing 52 compared to the lattice (cross-cut) arrangement. It can be easily pulled out in the direction of separation. In the present embodiment, in consideration of this point, the arrangement of the first terminals 53 constituting the first terminal block 55 is also staggered.

  In the present embodiment, the plurality of first through holes 34 and the first lands 36 are regularly arranged in a staggered manner, and the wiring 41 from different first lands 36 (for example, the first lands 36 on the lower stage side) is provided. The intervals between the plurality of first lands 36 (between the plurality of first lands 36 on the upper stage side than the first terminal 53 on the lower stage side) passed between them are substantially equal. Specifically, as shown in FIG. 6, the distances L11 and L13 between the first lands 36 of the same stage and the distance L12 between the first lands 36 of adjacent stages are substantially equal. For example, as shown in FIG. 6, when the wiring 41 from the same first land 36 passes between the first lands 36 having the distances L11 and L12, respectively, the narrower is the rate-limiting if the distances L11 and L12 are different. Become. Therefore, if the distance between the first lands 36 through which the wiring 41 is passed is made uniform, the first land block 38 can be made smaller (the printed board 31 can be made smaller).

  The intervals between the first lands 36 through which the wirings 41 from the different first lands 36 are not passed are equal to the intervals L11, L12, L13 between the first lands 36 through which the wirings 41 are passed. good. However, in the present embodiment, the plurality of first through holes 34 and the first lands 36 are regularly arranged in a staggered manner, and between the adjacent first lands 36, the wiring 41 from the different first lands 36 is used. The interval between the first lands 36 that are not passed through is made narrower than the interval between the first lands 36 through which the wirings 41 from different first lands 36 pass. Specifically, as shown in FIG. 6, the distance L14 between the first lands 36 where the wiring 41 is not passed between the distances L11, L12 and L13 between the first lands 36 where the wiring 41 is passed. Is narrowed. With such a configuration, the first land block 38 can be further reduced.

  The first land block 38 is a portion corresponding to the first terminal block 55 among the mounting portions of the printed circuit board 31 with the connector 50. Therefore, as described above, by including the first terminal 53 that transmits an analog signal (knock sensor signal or other analog sensor signal) that is susceptible to noise in the first terminal block 55, the first terminal 53, the first land, and the like. The second terminal 54, the second land 37, and the wiring 41 that transmit a large current signal do not exist around the wiring 36 and the wiring 41. That is, in the electronic control device 100, noise resistance can be improved.

  As described above, the second land block 39 includes the first through hole 34 and the first land provided in the printed circuit board 31 corresponding to the second terminal block 56 in the mounting portion of the printed circuit board 31 with the connector 50. 36, the second through hole 35, and the second land 37. Even in such a configuration, the distance between the lands 36 and 37 in the plane direction of the printed circuit board 31 is a distance at which a bridge is not generated (not short-circuited) by jet soldering.

  The arrangement of the second lands 37 in the second land block 39 is determined according to the second terminals 54 in the second terminal block 56 of the connector 50, and the number of stages is the uppermost stage (the side opposite to the housing 52). It is made into multiple stages. For example, if the second terminals 54 and the second lands 37 are arranged in three or more stages, the number of the second lands 37 on the same surface of the printed circuit board 31 is large, and the number of wirings 42 drawn from the second lands 37 is also large. In view of space, there is a high possibility that a plurality of wires 42 wider than the wires 41 must be passed between the second lands 37. Further, if the interval between the second lands 37 is constant, the space for drawing the wiring 42 from the second lands 37 on the lower stage side is reduced. In order to solve these problems, it is also conceivable that the printed circuit board 31 has a multilayer structure. On the other hand, in the present embodiment, the second terminals 54 are arranged in two stages, and the arrangement of the second lands 37 is accordingly arranged in two stages. As described above, when the second terminal 54 and the second land 37 are arranged in two stages, there is basically no passage of a plurality of wirings 42 wider than the wiring 41 between one second land 37. Compared to the arrangement of steps or more, at least one of the size reduction, simplification, and improvement in the degree of freedom of wiring of the printed circuit board 31 is possible.

  Further, in the present embodiment, as shown in FIGS. 8 and 9, a plurality of second through holes 35 and second lands 37 ensure a distance that does not cause a short circuit on both surfaces of the printed board 31 that is a double-sided board. However, it is a regular staggered arrangement. With such a regular staggered arrangement, the wiring 41 connected to the lower first land 36 or the lower wiring second land 37 compared to the lattice (cross-cut) arrangement, The housing 52 can be easily pulled out in the direction away from the second land 37 on the upper stage side. In the present embodiment, in consideration of this point, the arrangement of the second terminals 54 constituting the second terminal block 56 is also staggered.

  In the present embodiment, the distance between the second lands 37 through which at least the thick wiring 42 does not pass is narrower than the distance between the second lands 37 through which the wiring 42 passes in a range where no bridge is generated. Specifically, as shown in FIGS. 8 and 9, while the plurality of second through holes 35 and the second lands 37 are arranged in a staggered manner, an interval L21 between the adjacent second lands 37 in the same stage is It is wider than the interval L22 between the second lands 37 of the adjacent steps. Since the wiring 42 drawn out from the second land 37 is thicker than the wiring 41 drawn out from the first land 36, if the wiring 42 is passed in an oblique direction between the second lands 37 at adjacent stages, the wiring of the printed circuit board 31. The size in the plane direction becomes large. On the other hand, the second land block 39 is made smaller by adopting a configuration in which the interval L21 is wider than the interval L22, that is, a configuration in which at least the wiring 42 is not passed diagonally between the adjacent second lands 37. (The printed circuit board 31 can be made small).

  The arrangement of the first lands 36 in the second land block 39 is determined according to the first terminals 53 in the second terminal block 56 of the connector 50, and is arranged at least in the lowest stage on the housing 52 side of the connector 50. ing. In the present embodiment, the first terminals 53 are arranged in two stages, and the arrangement of the first lands 36 is also arranged in two stages.

  Further, in the present embodiment, as shown in FIGS. 8 and 9, a plurality of first through holes 34 and first lands 36 ensure a distance that does not cause a short circuit on both surfaces of the printed board 31 that is a double-sided board. However, it is a regular staggered arrangement. In this regular zigzag arrangement, the wiring 52 connected to the lower first land 36 is routed between the first lands 36 on the upper stage side of the housing 52 compared to the lattice (cross-cut) arrangement. It can be easily pulled out in the direction of separation. In the present embodiment, in consideration of this point, the arrangement of the first terminals 53 constituting the second terminal block 56 is also staggered.

  In the present embodiment, the first through hole 34 and the first land 36 constituting the second land block 39 and the first through hole 34 and the first land 36 constituting the first land block 38 at the same stage are provided. , The same configuration. Specifically, as shown in FIGS. 6 to 9, the distance L <b> 23 between the first lands 36 at the same stage in the second land block 39 is equal to the first land block 38 at the same stage as the first land 36. It is the same as the distance L13 between one land 36. In addition, an interval L24 between the first lands 36 of adjacent stages in the second land block 39 is the same as an interval L14 between the first lands 36 of adjacent stages in the first land block 38 having the same stage relationship. ing. Further, the diameter of the first through hole 34 and the diameter of the first land 36 are also equal, and the distances L15 and L25 between the same end portion of the printed circuit board 31 and the first land 36 at the lowest level are the same. With such a configuration, as described above, the first terminal 53 constituting the second terminal block 56 is the same type as the first terminal 53 of the same stage in the first terminal 53 constituting the first terminal block 55 as described above. Terminals can be employed. Therefore, the types of terminals 51 can be reduced and the manufacturing cost can be reduced. In the present embodiment, the first terminal block 55 and the second terminal block 56 employ five types of first terminals 53 and two types of second terminals 54.

  In the second land block 39, the distance L27 between the first land 36 and the second land 37 adjacent to each other is not particularly limited. In the present embodiment, the distance L27 between the first land 36 and the second land 37 is wider than the distances L23 and L24 between the first lands adjacent to each other. With such a configuration, the signal flowing through the first land 36 is less susceptible to noise from the large current signal flowing through the second land 37, and the noise resistance of the electronic control device 100 can be improved. In the present embodiment, the first terminal 53 through which the analog signal flows is the first terminal block 55, but in the configuration described above, the first terminal 53 through which the analog signal flows can also be the second terminal block 56. is there. If the interval L27 is wider than the intervals L23 and L24, the length of the leg portion of the second terminal 54 can be increased correspondingly, so that the second terminal 54 is easily elastically deformed due to stress and connected. Reliability can be improved.

  In the present embodiment, as shown in FIGS. 6 and 8, a distance L <b> 16 between one end of the printed circuit board 31 in the first land block 38 and the upper end of the first land 36 corresponding to the uppermost first terminal 53. The distance L26 between one end of the printed circuit board 31 in the second land block 39 and the upper end of the first land 36 corresponding to the uppermost first terminal 53 is substantially equal. With such a configuration, when the terminal 51 of the insertion mounting structure is adopted as the terminal 51 and the lands 36 and 37 corresponding to the terminal 51 (the first terminal 53 and the second terminal 54) are soldered together by jet solder, All the terminals 51 of the two terminal blocks 55 and 56 can be jet-soldered at a time. When jet soldering is performed at a time, in the two land blocks 38 and 39, the larger one of the distances L16 and L26 is rate-determined, and the narrower one is wasteful in the mounting prohibited area of the electronic component 32 exposed to the jet solder. Become wide. On the other hand, if it is set as the structure mentioned above, the mounting prohibition area | region of the electronic component 32 exposed to jet solder in the printed circuit board 31 can be reduced. In the present embodiment, the first land block 38 has five stages and the second land block 39 has four stages so that the distances L16 and L26 are equal, and the arrangement of the lands 36 and 37 (the distances L15 and L25 and the distances). L27 is adjusted). In the present embodiment, an example in which the distances L16 and L26 between the upper end of the first land 36 corresponding to the first terminal 53 at the uppermost stage and one end of the printed circuit board 31 are made substantially equal is shown. However, other than that, the distance between the center of the first land 36 and one end of the printed circuit board 31 may be substantially equal. Further, the distance between the upper end of the first land 36 and one end of the printed circuit board 31 in one land block may be equal to the distance between the center of the first land 36 and one end of the printed circuit board 31 in the other land block. . That is, in the direction away from the housing 52, the first land 36 corresponding to the uppermost first terminal 53 in the first land block 38 and the first land corresponding to the uppermost first terminal 53 in the second land block 39. If at least a part of 36 overlaps, the same or similar effects as in the present embodiment can be exhibited.

  In addition, the wirings 41 and 42 connected to the lands 36 and 37 are basically drawn in a direction away from the housing 52. Accordingly, since the wiring 42 does not pass between the first lands 36 on the lower stage side, the second land block 39 is configured as shown in FIG. The distance L28 between the centers of the adjacent second lands 37 is different from the distance L29 between the centers of the adjacent first lands 36 (the distance L28 is wider than the distance L29). As described above, when the distances L28 and L29 are different in the lands 36 and 37 provided in multiple stages, the adjacent first lands 36 and second lands 37 overlap in the longitudinal direction of the housing 52 in consideration of the degree of freedom of wiring. It is preferable to set the distances L28 and L29 so that they do not occur. That is, it is preferable to increase the distances L28 and L29 (corresponding distances L11 and L21) so that the least common multiple of the distances L28 and L29 is as large as possible. Thus, the second land block 39 has many restrictions on the arrangement of the first land 36 and the second land 37 as well as the distance L27 between the adjacent first land 36 and the second land 37 described above. On the other hand, in this embodiment, not only the second land block 39 but also the first land block 38 is provided. Since all the lands of the first land block 38 are the first lands 36 and the wiring drawn out from the lands 36 is also the wiring 41, the arrangement of the lands and the extraction of the wiring from the lands can be made efficient. Therefore, the physique of the printed circuit board 31 can be made smaller than the case where all the terminal blocks connected to one external connector are configured by the second land block 39.

  As described above, according to the electronic control apparatus 100 according to the present embodiment, in the second terminal block 56 including the second terminal 54 having a terminal diameter larger than that of the first terminal 53, a plurality of elements are arranged from the uppermost stage farthest from the circuit board 30. The stage is the second terminal 54, and at least the second terminal 54 including the lowest stage on the circuit board 30 side is the first terminal 53. Therefore, connection reliability can be improved.

  Further, the second terminal 54 is located above the first terminal 53, and in the circuit board 30, the second land 37 corresponding to the second terminal 54 is closer to the housing 52 than the first land 36 corresponding to the first terminal 53. The position will be separated. Accordingly, since the thick wiring 42 from the second land 37 does not need to pass between the first lands 36, the degree of freedom of drawing out the wirings 41 and 42 in the direction away from the housing 52 can be improved. Further, when the first terminal 53 is a signal terminal and the second terminal 54 is a power terminal, noise resistance can be improved.

  In addition, since the second terminals 54 are arranged in a plurality of stages in the second terminal block 56, the necessary number of second terminals 54 is disposed at a shorter distance than the arrangement of one stage in the arrangement direction of the terminals 51 (longitudinal direction of the housing 52). Can be secured. That is, the electronic control device 100 can be downsized in the planar direction of the circuit board 30.

  In addition, since the first terminal block 55 is provided, the size of the printed circuit board 31 can be reduced as compared with the case where all the terminal blocks connected to one external connector are the second terminal blocks 56.

  In addition, a plurality of terminal blocks provided for connection with an external connector are divided into a first terminal block 55 and a second terminal block 56. Therefore, when the first terminal 53 is a signal terminal and the second terminal 54 is a power terminal, the first terminal 53 that is easily affected by noise is the first terminal block 55, thereby improving noise resistance. You can also

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the present embodiment, the first terminal block 55 is configured by arranging five first terminals 53 in the direction perpendicular to the plane of the printed circuit board 31, and the second terminal block 56 is configured by the terminal 51 (first terminal). 53 and the second terminal 54) are arranged in four stages. However, the number of terminals 51 constituting each terminal block 55, 56 is not limited to the above example. For example, in the second terminal block 56, the second terminals 54 may be arranged in a plurality of stages from the uppermost stage, and the first terminals 53 may be arranged in the lower stage than the second terminals 54. That is, as the minimum configuration, a total of three stages in which the second terminal 54 is arranged in two stages and the first terminal 53 is arranged in one stage can be adopted.

  In the present embodiment, in order to improve noise resistance of the electronic control device 100, the first terminal 53 that transmits the first terminal 53 that transmits the analog signal among the first terminals 53 is connected to the first terminal block 55. An example to include is shown. Further, in the second land block 39, the interval L27 between the adjacent first lands 36 and the second lands 37 is made wider than the intervals L23 and L24 between the adjacent first lands 36, thereby forming the second terminal block 56. In this example, the corresponding terminals 51 are arranged correspondingly. Further, in the adjacent first land block 38 and second land block 39, the width of the gap region 40 is set so that the first land 36 is hardly affected by noise from a large current signal flowing in the second land 37. An example to be shown. However, other than that, for example, as shown in FIG. 10, the periphery of the first land 36 for transmitting a signal susceptible to noise and the wiring 41 drawn from the first land 36 is connected to, for example, GND. It may be surrounded by an electromagnetic shield wire 43. With such a configuration, it is possible to protect the first land 36 that transmits a signal easily affected by noise and the wiring 41 drawn from the first land 36 from noise in the plane direction of the printed circuit board 31. FIG. 10 is a plan view of the periphery of the connector mounting portion showing a modification of the printed circuit board 31 (circuit board 30). FIG. 10 shows an example of protecting the first land 36 at the end of the first land block 38 adjacent to the second land block 39 and the wiring 41 drawn from the first land 36 to the gap region 40. It was. However, the first land 36 constituting the second land block 39 and the wiring 41 drawn from the first land 36 to the gap region 40 may be protected. Further, the drawing of the wiring 41 is not limited to the gap area 40.

  In the present embodiment, an example in which a signal terminal is employed as the first terminal 53 and a power terminal is employed as the second terminal 54 has been described. However, if the other terminal is thicker than one terminal, the smaller terminal diameter can be adopted as the first terminal 53 and the second terminal 54 with a larger terminal diameter.

  In the present embodiment, as an example of the terminal 51 of the connector 50, a terminal having an insertion mounting structure that is inserted into the through-hole 33 provided in the printed board 31 and soldered to the corresponding lands 36 and 37 is shown. However, as a terminal, a terminal having a surface mounting structure that is solder-bonded (reflow mounting) to a corresponding land provided on the surface of the printed board can also be adopted.

  In the present embodiment, the plurality of terminal blocks 55 and 56 are partitioned by the housing 52, and the connector 50 is configured to be connected to four external connectors (a different external connector is connected to each terminal block 55 and 56). An example of the configuration is shown. However, the connector 50 only needs to have at least one first terminal block 55 and two second terminal blocks 56 as terminal blocks used for connection with the external connector, and the number of external connectors to be fitted is as follows. It is not particularly limited. For example, as a terminal block connected to one external connector, it is good also as a structure which has the 1st terminal block 55 and the 2nd terminal block 56 one by one, and as a terminal block used for a connection with a several different external connector The first terminal block 55 and the second terminal block 56 may each have at least one.

  For example, as shown in FIG. 11, adjacent terminal blocks 55 and 56 may be configured not to be partitioned by a housing 52. FIG. 11 is a plan view showing a modification of the connector. In the example shown in FIG. 11, one second terminal block 56 partitioned by the housing 52 is connected to one external connector, and the remaining three terminal blocks 55, 56 are defined as one second terminal block 56. It is configured to be connected to one different external connector. In addition, in FIG. 11, although the four terminal blocks 55 and 56 showed the example divided into three and one, it is good also as a structure divided into two each. Moreover, it is good also as a structure without a partition.

  Moreover, in this embodiment, the example in which all the terminal blocks 55 and 56 are comprised with respect to the same housing 52 was shown. However, the housing 52 may be configured by integrating a plurality of housing constituent members (for example, fitting with each other or fixing with other fixing members). It is sufficient that the first terminal block 55 and the second terminal block 56 are provided as one connector 50.

  In this embodiment, the example which provides the clearance gap area | region 40 (area | region where the terminal 51 is not arrange | positioned also between the corresponding several terminal blocks 55 and 56) between the several land blocks 38 and 39 was shown. However, a configuration in which the gap region 40 is not provided between the adjacent land blocks 38 and 39 may be employed. Also, a plurality of land blocks 38 (or land blocks 39) of the same type having a gap area 40 between them may be used as one land block 38 (or land block 39). The same applies to the terminal blocks 55 and 56 corresponding to the land blocks 38 and 39. For example, the two first land blocks 38 and the first terminal blocks 55 shown in the present embodiment may be replaced with one first land block 38 and one first terminal block 55, respectively.

  In the present embodiment, an example of a non-waterproof electronic control device is shown as the electronic control device 100. However, the present invention can also be applied to a waterproof electronic control device.

  In the present embodiment, the electronic control device 100 including the circuit board 30 and the connector 50 includes a plurality of first terminals 53 and a second terminal 54 having a larger diameter than the first terminals 53 as the terminals 51. The connector 50 has a first terminal block 55 including only the first terminal 53, a second terminal block 56 including the first terminal 53 and the second terminal 54, and the plane of the circuit board 30 constituting the second block. Among the terminals 51 arranged in a plurality of stages in a direction perpendicular to the circuit board 30, the plurality of stages from the uppermost stage farthest from the circuit board 30 are the second terminals 54, and the second terminals 54 including at least the lowest stage on the circuit board 30 side. An example in which the lower stage is the first terminal 53 is shown. However, in the above configuration, the configuration of the terminals 51 arranged in a plurality of stages in the direction perpendicular to the plane of the circuit board 30 constituting the second block is arranged, and the first terminals 53 are arranged at least on the lowest stage on the circuit board 30 side. It is good also as a structure to be performed. As described above, if the first terminal 53 having a diameter smaller than that of the second terminal 54 is disposed at least at the lowest stage where the length of the leg portion is the shortest, for example, based on the difference in linear expansion coefficient between the housing 52 and the circuit board 30. Even if stress occurs, cracks and the like are unlikely to occur at the solder joint between the lowermost terminal (first terminal 53) and the corresponding land 36. That is, the connection reliability can be improved while the second terminal 54 having a diameter larger than that of the first terminal 53 is included.

  In order to improve the connection reliability, a second terminal with a large diameter is adopted as a terminal with a long leg, and a first terminal with a small diameter is adopted as a terminal with a short leg. good. In addition, in order to improve the degree of freedom of wiring, a second terminal having a large diameter is adopted as a terminal connected to the land on the side far from the connector housing, and the land on the side closer to the connector housing is connected. The first terminal with a small diameter may be employed as the terminal to be used. Therefore, for example, there is a margin in connection reliability, and in order to increase the degree of freedom in wiring, the first terminal is arranged on the upper stage side so as to be connected to the land on the side closer to the connector housing, and the connector It is good also as a structure which has arrange | positioned the 2nd terminal in the lower stage side so that it may connect with the land of the far side with respect to this housing. Further, for example, there is a margin in terms of freedom of wiring, and in order to increase connection reliability, the second terminal is arranged on the upper stage side so as to be connected to the land on the side closer to the connector housing, and the connector It is good also as a structure which has arrange | positioned the 1st terminal in the lower stage side so that it may connect with the land of the far side with respect to this housing.

It is an exploded view which shows the state before an assembly | attachment for demonstrating schematic structure of the electronic controller which concerns on 1st Embodiment. It is a top view of the mounting part periphery of the state which mounted the connector in the circuit board. It is the top view seen from the connection side with an external connector in the state which mounted the connector in the circuit board. It is sectional drawing which follows the IV-IV line | wire shown in FIG. It is a top view of the connector mounting part periphery of a circuit board in the state before connector mounting. In FIG. 5, it is an enlarged plan view which shows the connector mounting surface side of a 1st land block. In FIG. 5, it is the enlarged plan view seen from the connector mounting surface side which shows the non-connector mounting surface side of a 1st land block. In FIG. 5, it is an enlarged plan view which shows the connector mounting surface side of a 2nd land block. In FIG. 5, it is the enlarged plan view seen from the connector mounting surface side which shows the non-connector mounting surface side of a 2nd land block. It is a top view of the connector mounting part periphery which shows the modification of a printed circuit board. It is a top view which shows the modification of a connector.

Explanation of symbols

30 ... Circuit board 31 ... Printed circuit board 36 ... First land 37 ... Second land 38 ... First land block 39 ... Second land block 50 ... Connector 51 ... Terminal 53 ... First terminal 54 ... Second terminal 55 ... First terminal block 56 ... Second terminal block 100 ... Electronic control unit

Claims (13)

A circuit board;
A connector in which one end is connected to a land of the circuit board and the other end is connected to an external connector, and a plurality of terminals are arranged in a direction along the plane of the circuit board and a direction perpendicular to the plane with respect to the housing; An electronic control device comprising:
The terminals include a plurality of first terminals and a plurality of second terminals having a terminal diameter larger than that of the first terminals,
The terminal is closer to the circuit board in accordance with the step position in the direction perpendicular to the plane of the circuit board, where the length of the leg portion that is the part exposed from the housing on the side connected to the land is closer to the circuit board. It has a short length,
The connector includes a first terminal block in which only a plurality of the first terminals are collected in a direction in which the terminals are arranged along a plane of the circuit board, a plurality of the first terminals, and a plurality of the second terminals. The collected second terminal blocks each have at least one terminal block provided for connection to an external connector,
Of the terminals arranged in a plurality of stages in a direction perpendicular to the plane of the circuit board, the second terminal block has two stages of an uppermost stage farthest from the circuit board and a lower stage adjacent to the uppermost stage. wherein a second terminal, Ri Oh at lower than the second terminal including a bottom of at least the circuit board side is the first terminal,
In a direction perpendicular to the plane of the circuit board, the first terminals constituting the second terminal block are arranged at the same height as the first terminals constituting the first terminal block at the same stage as the first terminals. The second terminal of the second stage constituting the second terminal block is disposed at a portion corresponding to the first terminal of the third stage including the uppermost stage farthest from the circuit board and constituting the first terminal block. an electronic control unit, characterized in that there. The electronic control device according to claim 1, wherein lands on one surface of the circuit board corresponding to the terminals are arranged in a staggered pattern. The circuit board has a plurality of through holes respectively corresponding to the plurality of terminals.
The land is provided around the wall surface and the opening of the through hole,
The electronic control device according to claim 1, wherein the terminal is electrically connected to the land through solder in a state of being inserted into the through hole. The connector is disposed in the vicinity of one end of the circuit board such that the terminal arrangement direction along the plane of the circuit board is parallel to one end of the circuit board,
4. The distance between the land corresponding to the uppermost terminal farthest from the circuit board and one end of the circuit board is the same between the first terminal block and the second terminal block. The electronic control apparatus as described in.   The first terminal constituting the second terminal block is the first terminal constituting the first terminal block and has the same shape as the first terminal of the same stage from the circuit board side. The electronic control device according to any one of claims 1 to 4.   The electronic control device according to claim 1, wherein the first terminal is a signal terminal for signal transmission, and the second terminal is a power terminal for power transmission.   The electronic control device according to claim 6, wherein at least one end portion of the plurality of terminal blocks is the second terminal block in the arrangement direction of the terminals along the plane of the circuit board.   The electronic control device according to claim 7, wherein both end portions of the plurality of terminal blocks are the second terminal blocks, respectively.   In the land on the one surface of the circuit board corresponding to the terminal constituting the second terminal block, an interval between the second terminal adjacent to each other and the land corresponding to the first terminal is adjacent to each other. The electronic control device according to claim 6, wherein the electronic control device is wider than an interval between the lands corresponding to the first terminals.   The lands corresponding to the second terminals are arranged in a staggered manner in a portion on the one surface side of the circuit board of the lands corresponding to the terminals constituting the second terminal block, and the lands adjacent to each other on the same stage are adjacent to each other. The distance between the lands corresponding to the second terminals is wider than the distance between the lands corresponding to the second terminals adjacent to each other in adjacent stages. The electronic control device described.   In the lands on one surface of the circuit board corresponding to the terminals constituting the first terminal block, the lands corresponding to the first terminals are arranged in a staggered manner, and the lands corresponding to the first terminals on the lower stage side 11. The electronic control device according to claim 1, wherein a distance between a plurality of adjacent lands through which wiring from a land passes is equal. 11.   In the lands on one surface of the circuit board corresponding to the terminals constituting the first terminal block, the lands corresponding to the first terminals are arranged in a staggered manner, and are different between the adjacent lands. 12. The interval between the lands in which wires from lands are not passed between is smaller than the interval between the lands in which wires from different lands are passed. The electronic control device according to item. In the arrangement direction of the terminals, the block of lands corresponding to the terminal block is arranged with an area without the land in between,
The width of the area without the land is substantially constant along a plane of the circuit board and perpendicular to the arrangement direction of the terminals. Electronic control device.

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