JP4983492B2 - Electronic unit - Google Patents

Description

  The present invention relates to an electronic unit configured such that an electronic device is attached / detached by attaching / detaching a connector.

In recent years, in-vehicle navigation systems are increasingly equipped with a hard disk as a storage device.
The internal structure of the in-vehicle navigation system is shown in FIG. A navigation system main body 100 that is a main part of the in-vehicle navigation system includes a hard disk 101 and a substrate 102 that can be attached to and detached from the hard disk 101.

  As shown in FIG. 10, the hard disk 101 includes a connector 103 that is electrically connected to the substrate 102. The hard disk unit 105 is formed by assembling the hard disk 101 and the holder 104 (see FIG. 11A).

The board 102 includes a connector 106 that is paired with the connector 103, and is assembled with the rail 107 (see FIG. 11A).
The hard disk 101 and the substrate 102 are connected by inserting the hard disk unit 105 into the rail 107 and connecting the connector 103 and the connector 106 (see FIG. 11B).

  The hard disk used in the navigation system is basically a standard product used in personal computers, etc., and the position of the connector terminal is not strictly defined. Therefore, in the above method, the hard disk unit is inserted into the board unit. In some cases, positional deviation of the terminals of the connectors attached to the hard disk unit and the board unit may occur.

  When the connector is fitted with a large terminal displacement, the terminal is deformed and damaged, making electrical connection impossible, or after fitting, the soldered part where the stress of the displaced terminal fixes the connector There is a risk that solder cracks will occur due to creep, resulting in poor contact. Therefore, in the navigation system having the above-described mounting structure, it is desirable that the connectors are fitted without being displaced when the hard disk unit is inserted into the board unit.

Therefore, conventionally, the following assembly method has been adopted.
First, as shown in FIG. 12, the holder 104 is set on the assembly jig 108, and then the terminals of the connector 103 of the hard disk 101 are set so as to fit the comb-shaped portion 109 of the assembly jig 108. In this state, the hard disk 101 and the holder 104 are screwed to precisely define the positional relationship between the holder 104 and the connector 103 in the hard disk unit 105.

  Next, as shown in FIG. 13, the rail 107 is set on the assembly jig 110, and then the substrate 102 is set so that the connector 106 of the board 102 contacts the connector alignment groove 111 of the assembly jig 110. In this state, the rail 107 and the board 102 are screwed to precisely define the positional relationship between the rail 107 and the connector 106.

Thereafter, the hard disk unit 105 is inserted into the rail 107 of the substrate 102 and connected.
When such a method is used, the positional relationship between the holder 104 and the connector 103 and the positional relationship between the rail 107 and the connector 106 are correctly defined. Therefore, when the holder 104 is inserted into the rail 107, the connectors Deviation can be suppressed.

  However, the above-described method requires two steps of using a jig in the manufacturing process, and it is necessary to inspect the accuracy of the terminal position at a predetermined interval to manage the process capability. There was a problem.

By the way, regarding the installation of a hard disk, an apparatus using a holder on which a guide frame is formed has been proposed. In this apparatus, when the holder is inserted into the rail, the guide frame comes into contact with the side surface of the connector provided on the board, and the fitting positions of the connectors are aligned. For this reason, misalignment between the connectors is suppressed, and a large stress is prevented from being applied to the terminals of the connector due to excessive fitting (see Patent Document 1). In the manufacturing process of this device, the process of defining the positional relationship between the connector of the board and the rail is not required, so it is only necessary to use a jig to define the positional relationship between the connector of the hard disk and the holder. Improves.
JP 2007-35376 A

  However, the above-described apparatus has a configuration in which the guide frame is connected to the substrate via the connector. Therefore, when a force is applied to the guide frame, such as when the hard disk unit is installed or when the vehicle vibrates, a large load is applied to the connector, and the connection portion between the board and the board-side connector is likely to be damaged. There was a problem.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electronic unit that improves the connection reliability of an electronic device while improving productivity.

The electronic unit according to claim 1, which has been made to solve the above-described problem, includes a substrate, an electronic device, and a pair of connectors.
The pair of connectors includes a first connector disposed on the board and a second connector disposed on the electronic device, and by relatively moving the first connector and the second connector in the attaching / detaching direction, The first connector and the second connector can be attached and detached, and the electronic device is attached and detached by this attachment and detachment.

Then, the electronic unit has a first connecting portion Ru fitting hole der formed on a surface crossing the detachable direction definitive substrate, and, fitted is formed on a surface crossing the detachable direction definitive electronic device and a position regulating member connected to the second connecting portions Ru Goana der. The position defining member is connected to the first connection portion and the second connection portion by fitting with the first connection portion and the second connection portion. The position defining member is connected to the first connecting portion, thereby suppressing relative movement of the substrate relative to the position defining member in a direction orthogonal to the attaching / detaching direction, and connected to the second connecting portion to be attached / detached. The relative movement of the electronic device with respect to the position defining member is suppressed with respect to the direction orthogonal to the direction.

  In the case of the electronic unit configured as described above, by attaching the position defining member, it is possible to suppress relative movement between the substrate and the electronic device in the direction orthogonal to the attaching / detaching direction. Can be maintained in a positional relationship determined by the position defining member. Therefore, it is not necessary to accurately attach the position of the first connector on the board side to the rail on the board side in advance, and as a result, the step of attaching the first connector and the rail on the board side using a jig in the manufacturing process may be eliminated. It is possible to improve the productivity of the electronic unit.

  Further, since the position defining member connects the substrate and the electronic device, even if some force is applied to the electronic device in a direction perpendicular to the attaching / detaching direction, the electronic device is connected to the electronic device via the position defining member in that direction. Since the positional relationship with the substrate is fixed, it is possible to suppress a large load on the connector and to improve the connection reliability of the electronic device.

Thus, the electronic unit described above can improve the connection reliability of the electronic device while improving the productivity.
A specific configuration for connecting the above-described position defining member to the substrate and the electronic device is not particularly limited. For example, the structure which connects the position-regulating member mentioned above to a board | substrate and an electronic device using a screw etc. can be considered.

Moreover , if it is an electronic unit of Claim 1, a position-defining member is moved along the attachment / detachment direction of a connector, and it is made to fit in a 1st connection part and a 2nd connection part, With respect to a board | substrate and an electronic device Since the position defining member can be connected, the assembling work can be facilitated. Further, if the position defining member is previously attached to the substrate or the electronic device, the attaching and detaching operation and the fitting operation of the substrate and the electronic device can be performed at the same time, and the assembling work is further simplified. Become.

In addition, as described in claim 2 , the position defining member has the first connection portion and the second connection portion in a positional relationship in which the first connector and the second connector are detachable with respect to a direction orthogonal to the attachment / detachment direction. It is good also as a structure to connect.

  In the case of the electronic unit configured as described above, when the electronic device is attached to the substrate in a state where the substrate and the electronic device are connected by the position defining member, the connectors are connected at the correct positions. Therefore, since a large stress is not applied as in the case where the connection terminals between the connectors are shifted from each other, the connector can be prevented from being damaged, and the connection reliability can be further improved.

Incidentally, a rail member for guiding the movement of the electronic device in the attaching / detaching direction may be used in connection with the mounting structure of the substrate and the electronic device. As described in claim 3 , the electronic unit described above may be configured such that the position defining member fixes the rail member and the substrate.

  With an electronic unit configured in this way, it is not necessary to prepare and attach parts such as screws for attaching the rail member to the board separately from the position-defining member, thus reducing parts and manufacturing man-hours. it can.

As described in claim 4 , the electronic device in the electronic unit described above may be a device including a hard disk.
Since the hard disk unit is heavy, the load on the connector tends to increase. However, with the above-described electronic unit, even a heavy hard disk can be detachably attached, and the load on the connector is not increased, and the attachment reliability of the electronic device can be improved.

Further, as described in claim 5 , the electronic unit may be mounted on a vehicle and used.
A device mounted on a vehicle often receives vibration during traveling. However, the electronic unit described above can increase the mounting reliability on the board without increasing the load on the connector.

Embodiments of the present invention will be described below with reference to the drawings.
(1) Overall Configuration The electronic unit 1 of the present invention constitutes a part of a navigation system that is mounted on a vehicle and used. As shown in FIG. 1, a board 10, a hard disk unit 20, a rail 30, a pair of connectors including a first connector 11 disposed on the substrate 10, and a second connector 21 disposed on the hard disk unit 20, and a position defining member 40.

  In the pair of connectors described above, the first connector 11 and the second connector 21 can be attached / detached by relatively moving the first connector 11 and the second connector 21 in the attaching / detaching direction (arrow A direction in FIG. 1). The hard disk unit 20 is attached to and detached from the substrate 10 by attaching and detaching the first connector 11 and the second connector 21.

  The board 10 is a plate-like member that extends in a direction perpendicular to the attaching / detaching direction. As shown in FIG. 2A, the first connector 11 described above is disposed on one surface, and FIG. As shown in (b), an external connection connector 13 for connecting to other components of the navigation system is disposed on the other surface. The substrate 10 is formed with two circular first fitting holes 12 penetrating in a direction perpendicular to the attaching / detaching direction.

The hard disk unit 20 includes a hard disk 23 and a holder 24 that houses the hard disk 23 therein.
As shown in FIG. 3A, the above-described holder 24 is attached to and detached from the second connector 21 of the hard disk 23 by the first connector 11 disposed on the substrate 10 on the surface 25 perpendicular to the attaching and detaching direction of the holder 24. An opening 26 for enabling and two circular second fitting holes 22 penetrating in a direction orthogonal to the attaching / detaching direction are formed. A view of the holder 24 as seen from the direction of arrow B is shown in FIG.

  The rail 30 guides movement of the hard disk 23 in the attaching / detaching direction, and as shown in FIG. 1, the hard disk unit 20 is formed in a shape that can be inserted in the attaching / detaching direction. In addition, a screw hole 31 for fixing the rail 30 to the substrate 10 is formed on the surface in contact with the substrate 10.

  As shown in FIG. 4, the position defining member 40 is a shaft-like member having a screw head 41 formed at one end, and in order from the screw head 41 side, the substrate positioning portion 42, the screw portion 43, and the holder positioning. A portion 44 is formed, and the other end has a conical shape with a thin tip.

  The screw head 41 has a cross groove formed in the axial direction at the one end, and when a screwdriver or the like is inserted into the cross groove and rotated with the shaft of the shaft member (C in FIG. 4) as a rotation axis, The entire position defining member 40 rotates with the above-described axis as a rotation axis. The screw head 41 is formed larger than the first fitting hole 12 in the direction orthogonal to the axis so as not to pass through the first fitting hole 12.

The substrate positioning portion 42 has a cylindrical shape with the above-mentioned axis as a central axis, and is formed with a diameter that fits into the first fitting hole 12 by light press-fitting.
Further, the screw portion 43 is formed with a screw thread, and as shown in FIG. 1, the screw portion 43 is screwed into a screw hole 31 formed in the rail 30 to fix the rail 30 and the substrate 10. The height of the thread is adjusted in a direction perpendicular to the axis so that the threaded portion 43 can pass through the first fitting hole 12.

  The holder positioning portion 44 has a cylindrical shape with the above-mentioned axis as a central axis, and is formed with a diameter that fits into the second fitting hole 22 by light press-fitting. The holder positioning portion 44 is adjusted so that the holder positioning portion 44 has a diameter that passes through the screw hole 31 of the rail 30.

  In the state in which the electronic unit 1 is assembled, as shown in FIG. 1, the position defining member 40 has the axis of the position defining member 40 orthogonal to the substrate 10 that is a plate-like member and the surface 25 of the holder 24. The board positioning part 42 and the holder positioning part 44 are fitted with the first fitting hole 12 and the second fitting hole 22, respectively. Further, the screw portion 43 is screwed into the screw hole 31 to fix the rail 30 and the substrate 10.

The position defining member 40 is fitted into the first fitting hole 12 to suppress relative movement of the substrate 10 with respect to the position defining member 40 in the direction orthogonal to the attaching / detaching direction, and the second fitting hole. 22, the relative movement of the hard disk unit 20 with respect to the position defining member 40 is suppressed in the direction orthogonal to the attaching / detaching direction.
(2) Assembly of the hard disk unit 20 In the hard disk unit 20, the hard disk 23 and the holder 24 are assembled as follows.

  First, the holder 24 is set on the assembly jig 50. Here, as shown in FIG. 5, the second fitting hole 22 is fitted into the protrusion 51 of the assembly jig 50. Next, the hard disk 23 is set so that the terminals of the second connector 21 fit the comb-shaped portion 52 of the assembly jig 50. FIG. 6 shows a view of the hard disk 23 and the holder 24 in this state viewed from the direction of arrow D in FIG. Then, the hard disk 23 and the holder 24 are fixed by screwing in the set state as described above.

The positional relationship between the protrusion 51 and the comb-shaped portion 52 in the assembly jig 50 is such that the position defining member 40 and the first connector 11 are in a state where the position defining member 40 is fitted in the first fitting hole 12 of the substrate 10. It is defined in the same way as the positional relationship. Therefore, in the above-described method, the hard disk 23 is in a state where the positional relationship between the second connector 21 and the second fitting hole 22 is defined so that the first connector 11 and the second connector 21 can be attached and detached. And the holder 24 can be assembled.
(3) Assembly of Electronic Unit 1 Assembly of electronic unit 1 is realized by connecting second connector 21 of hard disk unit 20 to first connector 11 of substrate 10. When the hard disk unit 20 is inserted along the rail 30 of the substrate 10, the second fitting hole 22 and the holder positioning portion 44 of the position defining member 40 approach each other. Since the tip of the position defining member 40 has a conical shape, even if the center of the second fitting hole 22 and the axis of the position defining member 40 are misaligned, the tip of the position defining member 40 is at the second fitting hole 22. (See FIG. 7A). When the insertion is continued, the end surface of the holder 24 that forms the second fitting hole 22 comes into contact with the side surface at the tip of the position defining member 40. When the insertion is further continued, the end surface of the holder 24 slides along the side surface, so that the hard disk unit 20 moves until the center of the second fitting hole 22 coincides with the axis of the position defining member 40. (See FIG. 7B). Thus, the position regarding the direction orthogonal to the said attachment / detachment direction of the board | substrate 10 and the hard-disk unit 20 is defined by the 2nd fitting hole 22 and the position determination member 40 fitting in two places.

Since the positional relationship between the position defining member 40 and the first connector 11 and the positional relationship between the second fitting hole 22 and the second connector 21 are determined as described above, the position defining member 40 and the second fitting hole are determined. When the hard disk unit 20 is further inserted in a state in which the first connector 11 and the second connector 21 are fitted, the first connector 11 and the second connector 21 are normally connected.
(4) Effect In the electronic unit 1 configured as described above, the attachment / detachment is performed in a state where the first connector 11 and the second connector 21 are correctly attached and detached by attaching the position defining member 40. The relative movement between the substrate 10 and the hard disk unit 20 in the direction orthogonal to the direction can be suppressed.

  Therefore, the position of the first connector 11 on the board 10 side does not need to be accurately attached to the rail 30 on the board 10 side in advance, and as a result, the first connector 11 and the rail 30 on the board 10 side using the jig are used in the manufacturing process. The process of attaching can be eliminated.

  Further, since the position defining member 40 connects the substrate 10 and the hard disk unit 20 in the correct positional relationship, it is possible to prevent the connector from being damaged due to the stress due to the displacement of the connector. Further, even if any force is applied to the hard disk unit 20 in the direction orthogonal to the attaching / detaching direction, the hard disk unit 20 and the substrate 10 are fixed via the position defining member 40 in that direction. Thus, no great stress is applied to the connector, and damage to the connector can be suppressed to improve connection reliability.

  Moreover, if it is the electronic unit 1 mentioned above, since the fitting with the position-defining member 40 and the 2nd fitting hole 22 can be implement | achieved simultaneously with connecting the 1st connector 11 and the 2nd connector 21, the assembly | attachment operation | work is carried out. Can be easily.

  Further, in the electronic unit 1 described above, it is not necessary to prepare and attach parts such as screws for attaching the rail 30 to the substrate 10 separately from the position defining member 40, so that parts reduction and manufacturing man-hours can be reduced. realizable.

Further, with the electronic unit 1 described above, sufficient connection reliability is maintained even if it is used in an in-vehicle device that is frequently subjected to vibrations due to traveling or is equipped with a heavy hard disk 23. be able to.
(5) Modifications Embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and can take various forms as long as they belong to the technical scope of the present invention. Needless to say.

  For example, in the above-described embodiment, the position defining member 40 is configured to be fitted and connected to the board 10 and the hard disk unit 20 by relatively moving the position defining member 40 along the connector attaching / detaching direction. If the relative movement regarding the direction orthogonal to the said attachment / detachment direction of the board | substrate 10 and the hard-disk unit 20 can be suppressed by attaching, the specific structure which attaches the position determination member 40 will not be specifically limited. For example, the position defining member may be configured to be connected by screwing to the substrate 10 and the hard disk unit 20.

  Further, in the above embodiment, the first fitting hole 12 and the second fitting hole 22 are circular holes, and are fitted to the columnar substrate positioning portion 42 and the holder positioning portion 44 in the position defining member 40. Although the configuration is illustrated, the shape to be fitted is not limited to a circle. For example, the position defining member may be a prism, and the first fitting hole and the second fitting hole may be formed in a shape in which the prism is fitted. With such a configuration, there is no possibility that the position defining member rotates in the fitting hole, and the relative movement of the substrate 10 and the hard disk unit 20 with respect to the direction perpendicular to the attaching / detaching direction can be performed with one position defining member. Can be suppressed.

  Moreover, in the said embodiment, although the structure which inserts the hard-disk unit 20 with respect to the board | substrate 10 with which the position-defining member 40 was previously attached was illustrated, the structure where the position-defining member 40 is attached to the hard-disk unit 20 side beforehand is illustrated. It may be the structure which attaches after connecting connectors.

Moreover, in the said embodiment, although the electronic unit 1 which attached the hard disk unit 20 was illustrated, the structure which attaches apparatuses other than a hard disk may be sufficient.
Moreover, in the said embodiment, although the 2nd fitting hole 22 illustrated about the structure formed in two places of the holder 24, the structure formed in only one place may be sufficient. In that case, as shown in FIG. 8, one of the holes into which the two position defining members 40 are fitted is the second fitting hole 22, and the other has a length in the direction in which the two holes are arranged. A long hole 27 is preferable. With such a configuration, even if there is a difference between the interval between the two position defining members 40 attached to the substrate 10 and the interval between the two fitting holes formed in the holder 24, it is easy. The substrate 10 and the hard disk unit 20 can be attached and detached.
(6) Correspondence with the Present Invention In the embodiment described above, the hard disk unit 20 is the electronic device according to the present invention, and the first fitting hole 12 and the second fitting hole 22 are the first connection portion according to the present invention. And a second connecting portion.

The side view which shows the electronic unit of this invention Side view showing the board Side view showing holder Side view showing position regulating member Side view showing the mounting jig for the hard disk unit Side view showing the connection between the hard disk and the holder The figure which shows the operation | movement at the time of fitting with a position prescription | regulation member and a 2nd fitting hole The figure which shows the modification of a holder A perspective view showing the internal structure of the navigation system Side view showing hard disk The perspective view (a) which shows the state before the connection of a board | substrate and a hard disk, and the perspective view (b) which shows the state after a connection Side view showing the mounting jig for the hard disk unit Side view showing the rail mounting jig

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electronic unit, 10 ... Board | substrate, 11 ... 1st connector, 12 ... 1st fitting hole, 13 ... External connection connector, 20 ... Hard disk unit, 21 ... 2nd connector, 22 ... 2nd fitting hole, 23 ... Hard disk, 24 ... holder, 25 ... surface, 26 ... opening, 27 ... long hole, 30 ... rail, 31 ... hole, 40 ... position defining member, 41 ... head, 42 ... board positioning part, 43 ... screw part, 44 ... Holder positioning part, 50 ... Assembly jig, 51 ... Projection part, 52 ... Comb-shaped part, 100 ... Navigation system body, 101 ... Hard disk, 102 ... Substrate, 103 ... Connector, 104 ... Holder, 105 ... Hard disk unit, 106 ... Connector , 107 ... rail, 108 ... assembly jig, 109 ... comb-shaped portion, 110 ... assembly jig, 111 ... connector alignment groove

Claims (5)

A substrate,
An electronic device;
The first connector disposed on the substrate and the second connector disposed on the electronic device, and the first connector and the second connector are moved relative to each other in the attaching / detaching direction, thereby A pair of connectors that allow one connector and the second connector to be attached and detached,
An electronic unit configured such that the electronic device is attached to and detached from a substrate by attaching and detaching the first connector and the second connector,
The first connecting portion Ru fitting hole der formed on a surface that intersects the detachment direction definitive on the substrate, and, Ru fitting hole der formed in a surface that intersects the detachment direction definitive to the electronic device By fitting with the second connection portion , the position defining member connected to the first connection portion and the second connection portion is provided,
The position defining member is connected to the first connecting portion, thereby suppressing relative movement of the substrate with respect to the position defining member in a direction orthogonal to the attaching / detaching direction, and connected to the second connecting portion. By doing so, relative movement of the electronic device with respect to the position defining member in a direction orthogonal to the attaching / detaching direction is suppressed. The position defining member connects the first connection portion and the second connection portion in a positional relationship in which the first connector and the second connector are attachable / detachable with respect to a direction orthogonal to the attaching / detaching direction. The electronic unit according to claim 1 . The electronic unit includes a rail member that guides movement of the electronic device in the attachment / detachment direction,
The position-defining member is an electronic unit according to claim 1 or claim 2, characterized in that to fix the substrate and the rail member. The electronic device, an electronic unit according to any one of claims 1 to 3, characterized in that the device comprises a hard disk drive. The electronic unit, an electronic unit according to any one of claims 1 to 4, characterized in that one used mounted on a vehicle.