JP5058610B2 - Mobile body mounting device - Google Patents

Description

  The present invention relates to a mobile unit mounting apparatus.

  Conventionally, various electric components such as a radio receiver, a television receiver, a navigation device, and a DVD (Digital Versatile Disk) player are mounted on a moving body such as a vehicle. Such an electrical component includes a device having a mechanical structure in order to function as an apparatus, and a printed circuit assembly (hereinafter also referred to as “PCA”) for controlling the device. Here, the PCA includes a printed wiring board on which a predetermined conductor pattern is formed, and circuit components mounted on the printed wiring board (hereinafter also referred to as “PWB”).

  Such electrical components generally have a metal casing (see Patent Document 1). In particular, for electrical components having a mechanism for rotationally driving a storage medium such as a hard disk device or a DVD drive device, a metal member such as a steel plate is used as a material for the housing in order to take measures against vibrations generated during movement of the moving body. Is adopted.

The following configuration (hereinafter referred to as “conventional example”) is generally employed when a metal casing is used that has a mechanism for rotationally driving such a storage medium. That is, a device 910 having a mechanism for rotationally driving a storage medium such as an optical disk drive is made of a metal bracket member 920 via a metal bracket member 920 as in the electrical component 900 generally shown in FIGS. Fixed to the housing 940. And this housing | casing 940 is fixed to metal vehicle brackets (601,606).
Japanese Utility Model Publication No. 5-56651

  In the case of having the fixing structure as in the above-described conventional example, vibration generated when the vehicle travels is transmitted from the vehicle bracket to the device having a mechanism for rotating the storage medium through the housing. Here, in the conventional example, since the strength of the casing can be ensured by adopting a metal casing as the casing, it is possible to suppress the occurrence of resonance in the device due to the vibration generated when the vehicle travels. Can do.

  However, if the material of the housing 940 is made of resin in the conventional example for weight reduction, since the resin is inferior in strength to metal, resonance in the device 910 is likely to occur due to vibration that occurs during vehicle travel. . For this reason, if the material of the housing 940 in the conventional example is simply made of resin having low mechanical strength, there is a concern that the occurrence of a situation in which data cannot be continuously read when data recorded on the recording medium is read. Is done. The occurrence of such a situation leads to the occurrence of sound skipping and video skipping during audio / video playback.

  In addition, as in the conventional example, when a metal casing is employed, efficient heat dissipation is achieved by thermally connecting the casing and the heat radiating part of a high heat-generating component such as a heat radiating fin. It is possible to effectively prevent an excessive temperature rise of the high heat-generating component. This is because the metal casing is a good thermal conductor and is connected to a metal fixing member prepared for the moving body, so that the metal casing is highly thermally conductive to a member having a large heat capacity called the chassis of the moving body. It is because it is thermally connected at a rate.

  However, if the casing is made of resin for weight reduction, the resin is inferior in thermal conductivity compared to metal, so the temperature rise of the high heat-generating component cannot be suppressed to the same extent as the metal casing. . Therefore, if the housing is simply changed from metal to resin for weight reduction, there is a concern that the stability of the operation of the mobile unit mounting apparatus is deteriorated.

  For this reason, there is a need for a technique that can reduce the weight of the mobile body mounting device while eliminating the above-described concerns. Meeting this requirement is one of the problems to be solved by the present invention.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a movable body mounting apparatus that can reduce the weight while ensuring operational stability.

The invention according to claim 1 is a device having a mechanical structure; a printed circuit assembly in which circuit components for controlling the device are disposed on a printed wiring board; a high heat generation component having a large heat generation amount; A metal bracket member connected to the device and connected to a metal fixing member prepared in the moving body to dissipate heat generated by the high heat-generating component; the device, the printed circuit assembly, and the device A resin-made housing member that houses a highly heat-generating component, and the housing member includes a housing main body formed with a rectangular cutout; and a housing top plate that is fitted into the housing main body. A connecting portion of the bracket member to the fixing member is located in an opening formed when the housing top plate portion is fitted into the housing body portion, and the bracket member is The solid Use member and is directly connected, it is a mobile mounted apparatus according to claim.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the following description, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

[Constitution]
FIG. 3 shows an external view of an optical disc reproducing apparatus 100 that is a moving body mounting apparatus according to the present embodiment. The optical disk playback apparatus 100 includes an optical disk drive 110, a bracket 120, a printed circuit assembly (PCA) 130, a housing 140, a decorative panel, as comprehensively shown in the exploded perspective views of FIGS. 150 and the heat radiating member 170 are combined. The XYZ coordinate system in FIGS. 3 to 5 (the same applies to FIGS. 6 to 11 described later) is defined as shown.

<Configuration of Optical Disk Drive 110>
The optical disc drive 110 contains components necessary for reproducing the optical disc OPD such as an optical pickup (not shown), a main shaft, a sub shaft, a spindle motor, and a rail. As shown in FIG. 4, an insertion slot 114 for inserting an optical disk OPD such as a CD or a DVD is formed on the front surface 111 of the optical disk drive 110 on the + X direction side. The optical disc drive 110 reads out data recorded on the optical disc inserted from the insertion slot 114 using laser light.

  Further, two screw insertion holes are provided on the side surface 112 in the −Y direction and the side surface 113 in the + Y direction of the optical disc drive 110, respectively. The side surface 112 is provided with screw insertion holes 112a and 112b (both not shown). The screw insertion hole provided on the −X direction side from the center of the side surface 112 is 112a, and the + X direction side from the center of the side surface 112. The screw hole insertion hole provided in is 112b. The side surface 113 is provided with screw insertion holes 113a and 113b. The screw insertion hole provided on the −X direction side from the center of the side surface 113 is 113a, and the screw hole provided on the + X direction side from the center of the side surface 113. The insertion hole is 113b.

  The screw insertion holes 112a and 112b are for fixing the side surface 112 of the optical disc drive 110 and the fixing member 121 (more specifically, the side wall 122) constituting the bracket 120 described later with screws. The screw insertion holes 113a and 113b are for screwing and fixing the side surface 113 of the optical disc drive 110 and a fixing member 126 (more specifically, the side wall 127) constituting the bracket 120 described later.

<Configuration of bracket 120>
A steel plate is used as the material of the bracket 120. As shown in FIGS. 4 and 5, the bracket 120 includes two fixing members 121 and 126, and each fixing member 121 and 126 has a shape obtained by deforming the U-shape in an XY plan view. .

  Since the fixing member 121 is fixed to the side surface 112 of the optical disk drive 110 with screws, the fixing member 121 is disposed on the −Y direction side with respect to the optical disk drive 110. The fixing member 121 includes a rectangular side wall 122 and a side wall 123 developed in the XZ plane, and a rectangular bottom plate 124 developed in the XY plane, and is formed integrally.

  The side wall 122 is further divided into two rectangular portions via the bottom plate 124. Further, a screw insertion hole 122a is provided in the approximate center of the side wall 122 on the −X direction side, and a screw insertion hole 122b is provided in the approximate center of the side wall 122 on the + X direction side. These screw insertion holes 122a and 122b individually correspond to the screw insertion holes 112a and 112b provided in the side surface 112 of the optical disc drive 110 described above, and the optical disc drive 110 and the fixing member 121 are fixed by screws. The

  The side wall 123 is provided with two screw insertion holes 123a and 123b. The screw insertion hole 123 a is provided on the −X direction side from the center of the side wall 123, and the screw insertion hole 123 b is provided on the + X direction side from the center of the side wall 123. These screw insertion holes 123a and 123b are screwed and fixed to a vehicle bracket (601, 606) to be described later after the optical disk reproducing apparatus 100 is assembled (see FIGS. 7 and 8). ).

  The bottom plate 124 is provided with two screw insertion holes 124a and 124b (both not shown). The screw insertion hole 124 a is provided at the end of the bottom plate 124 on the −X direction side, and the screw insertion hole 124 b is provided at the end of the bottom plate 124 on the + X direction side. These screw insertion holes 124a and 124b are used to fix the optical disc drive 110 and the bracket 120 (both of the fixing members 121 and 126) with screws, and then to fix the bottom plate 142 (described later) of the housing 140 with screws. (See FIG. 5).

  The fixing member 126 is configured in substantially the same manner as the fixing member 121 described above. That is, the fixing member 126 is disposed on the + Y direction side with respect to the optical disk drive 110 in order to fix the fixing member 126 to the side surface 113 of the optical disk drive 110 with screws. The fixing member 126 has rectangular side walls 127 and 128 developed on the XZ plane, and a rectangular bottom plate 129 developed on the XY plane, and is formed integrally.

  The side wall 127 is further divided into two rectangular portions via the bottom plate 129. Then, a screw insertion hole 127a is provided in the approximate center of the side wall 127 on the -X direction side, and a screw insertion hole 127b is provided in the approximate center of the side wall 127 on the + X direction side. These screw insertion holes 127a and 127b individually correspond to the screw insertion holes 113a and 113b provided on the side surface 113 of the optical disc drive 110 described above, and the optical disc drive 110 and the fixing member 126 are fixed by screws. The

  Further, a rectangular wall 127c extending along the −Y direction from the −X direction side end portion is provided on the −X direction side wall 127. A screw insertion hole 127d is provided substantially at the center of the wall 127c. The screw insertion hole 127d corresponds to the opening 137 formed in the heat radiation fixing portion 136 of the power transistor 135 mounted on the PCA 130, and the heat radiation fixing portion 136 is fixed to the wall 127c by screwing. Yes.

  The side wall 128 is provided with two screw insertion holes 128a and 128b (see FIG. 5). The screw insertion hole 128 a is provided on the −X direction side from the center of the side wall 128, and the screw insertion hole 128 b is provided on the + X direction side from the center of the side wall 128. These screw insertion holes 128a and 128b are fixed to the vehicle brackets (601 and 606) with screws after the optical disk reproducing apparatus 100 is assembled (see FIGS. 7 and 8).

  The bottom plate 129 has two screw insertion holes 129a and 129b. The screw insertion hole 129a is provided at the end of the bottom plate 129 on the −X direction side, and the screw insertion hole 129b is provided at the end of the bottom plate 129 on the + X direction side. These screw insertion holes 129a and 129b are for fixing the optical disc drive 110 and the bracket 120 with screws and then fixing the bottom plate 142 of the housing 140 with screws (see FIG. 5).

  As described above, the bracket 120 is fixed to the optical disc drive 110 with screws, is fixed to the housing 140 with screws, and is also fixed to the vehicle brackets (601, 606) constituting the vehicle with screws. Thus, the bracket 120 plays a role of fixing the optical disc drive 110 to the vehicle.

<Configuration of PCA 130>
The PCA 130 is obtained by mounting various components on a printed wiring board (PWB) on which a predetermined conductor pattern is formed. As shown in FIGS. 4 and 5, the PCA 130 is housed in the housing 150 and disposed on the −Z direction side of the optical disc drive 110. The PCA 130 is provided with screw insertion holes 131a to 131d.

  The four screw insertion holes 131 a to 131 d are used for fixing the PCA 130 to the bottom plate 142 of the housing 140.

  As a component mounted on the PWB of the PCA 130, there is a power transistor 135 which is a high heat generation component. The power transistor 135 has a fixed portion 136 for heat dissipation. The heat-dissipating fixing part 136 is screwed to the fixing member 126 of the bracket 120 using an opening 137 that can be used as a screw insertion hole formed in the heat-dissipating fixing part 136.

<Configuration of casing 140>
Next, the configuration of the housing 140 will be described. For the material of the housing 140, a conductive resin containing a conductive substance such as carbon is used in order to reduce the weight of the optical disc reproducing apparatus 100. As shown in FIGS. 4 and 5, the housing 140 has a hollow rectangular cubic shape and houses the optical disk drive 110, the bracket 120, and the PCA 130 described above.

  The housing 140 before assembly consists of two parts. One is a member 149 in which a front plate 141, a bottom plate 142, side walls 145, 146, and a rear plate 148 are formed by integral molding, and the other is a top plate 147.

  The front surface 141 has an opening 141 a for inserting an optical disk into the optical disk drive 110.

  The bottom plate 142 has a rectangular shape in the XY plan view. As shown in FIG. 6, a total of eight mounting bosses 143 a to 143 d and 144 a to 144 d are integrally formed on the bottom plate 142. The mounting bosses 143a to 143d individually correspond to the screw insertion holes 124a, 124b, 129a, 129b provided in the fixing members 121, 126, and are for fixing the bracket 120 to the bottom plate 142 of the housing 140 with screws. It is. Note that it is better to fix the bracket 120 to the optical disc drive 110 with screws before fixing the bracket 120 to the housing 140 with screws.

  The mounting bosses 144a to 144d individually correspond to the screw insertion holes 131a to 131d provided in the PCA 130, and are for fixing the PCA 130 to the housing 140 with screws.

  Returning to FIGS. 4 and 5, the side wall 145 is arranged on the −Y direction side with respect to the bottom plate 142. The side wall 145 has a rectangular cutout 145a. The notch 145a is provided to directly fix the fixing member 121 and the vehicle bracket (601, 606) with screws.

  On the other hand, the side wall 146 is disposed on the + Y direction side with respect to the bottom plate 142. The side wall 146 has a rectangular cutout 146a, like the side wall 145. The notch 146a is provided to directly fix the fixing member 126 and the vehicle bracket (601, 606) with screws.

  The top plate 147 has a rectangular shape in the XY plan view. And it has the wall 147a extended along the -Z direction from the -Y direction side edge part of the top plate 147, and the wall 147b extended along the -Z direction from the + Y direction side edge part of the top plate 147.

  The length of the wall 147a in the X direction is the same as the length of the notch 145a in the X direction. An opening formed by fitting the wall 147a into the notch 145a has substantially the same shape as the side wall 123 of the fixing member 121. Similarly, the length of the wall 147b in the X direction is the same as the length of the notch 146a in the X direction. The opening formed by fitting the wall 147b into the notch 146a has substantially the same shape as the side wall 128 of the fixing member 126.

  The two parts constituting the housing 140 are provided with a fitting hole (not shown) and a locking projection, and are assembled in a fitting manner.

<Configuration of decorative panel 150>
Next, the configuration of the decorative panel 150 will be described. As shown in FIGS. 4 and 10, the decorative panel 150 has a rectangular cubic shape. The decorative panel 150 is provided with parts required for optical disc reproduction operation (not shown), and has an opening 151 for inserting the optical disc into the optical disc drive 110, similarly to the front surface 141 of the housing 140.

  In addition, the decorative panel 150 is provided with a screw insertion hole (not shown) and is fixed to the housing 140 with screws.

  Next, the mounting of the optical disc playback apparatus 100 configured as described above to a vehicle will be described.

  As shown in FIG. 7, the optical disk reproducing device 100 is attached to the vehicle by screwing and fixing the optical disk reproducing device 100 and the vehicle brackets (601, 606).

  The vehicle brackets (601, 606) constitute a part of the vehicle, and a steel plate is used as a material. As shown in FIGS. 7 and 8, the vehicle bracket (601, 606) includes two device fixing members 601, 606. These device fixing members 601 and 606 are L-shaped in an XY plan view.

  The device fixing member 601 is disposed on the −Y direction side with respect to the optical disc playback apparatus 100 in order to fix the optical disc playback apparatus 100 with screws. The device fixing member 601 has a rectangular side wall 602 developed on the XZ plane and an attachment piece developed on the YZ plane.

  The side wall 602 is provided with two screw insertion holes 602a and 602b. The screw insertion hole 602 a is provided on the −X direction side from the center of the side wall 602, and the screw insertion hole 602 b is provided on the + X direction side from the center of the side wall 602. These screw insertion holes 602a and 602b individually correspond to the screw insertion holes 123a and 123b provided in the side wall 123 of the fixing member 121 described above, and the optical disc reproducing apparatus 100 and the apparatus fixing member 601 are screwed. Fixed.

  In addition, the device fixing member 606 is disposed on the + Y direction side with respect to the optical disc playback apparatus 100 in order to be fixed to the optical disc playback apparatus 100 with screws. The device fixing member 606 has a rectangular side wall 607 developed on the XZ plane and an attachment piece developed on the YZ plane.

  The side wall 607 is provided with two screw insertion holes 607a and 607b. The screw insertion hole 607 a is provided on the −X direction side from the center of the side wall 607, and the screw insertion hole 607 b is provided on the + X direction side from the center of the side wall 607. These screw insertion holes 607a and 607b individually correspond to the screw insertion holes 128a and 128b provided on the side wall 128 of the fixing member 126 described above, and the optical disc reproducing apparatus 100 and the apparatus fixing member 606 are screwed. Fixed.

  A structure in which the optical disk reproducing apparatus 100 is attached to the vehicle brackets (601, 606) as described above is shown in FIG. An XY sectional view of the optical disc reproducing apparatus 100 shown in FIG. 8 is shown in FIG. Further, a YZ sectional view of the optical disc reproducing apparatus 100 shown in FIG. 8 is shown in FIG.

  As shown in FIG. 7 to FIG. 10, the optical disc reproducing apparatus 100 is attached to the vehicle in a steel plate bracket 120 constituting the optical disc reproducing apparatus 100 and a steel plate vehicle bracket (601) constituting the vehicle. , 606) are fixed with screws.

  As described above, in the present embodiment, the housing (top plate 147 and member 149) of the in-vehicle optical disc reproducing apparatus 100 is made of resin. For this reason, the weight reduction of the vehicle-mounted optical disk reproducing device 100 as a whole can be achieved.

  In the present embodiment, the optical disk drive 110 is screwed and fixed to a steel plate bracket 120, and the bracket 120 is directly screwed to a steel plate vehicle bracket (601, 606) prepared in the vehicle. It is fixed. Since the optical disc drive 110 is not held by the housing 140 while the housing 140 is made of resin, it is not affected by the mechanical strength of the housing 140. For this reason, the occurrence of resonance in the optical disc drive 110 can be suppressed. Therefore, it is possible to effectively prevent the occurrence of sound skipping and video skipping during optical disc playback while the vehicle is running, while reducing the overall weight of the optical disc playback apparatus 100.

  Further, a heat radiation fixing portion 136 of the power transistor 135 is screwed to the bracket 120. As a result, even in the case of the resin casing 140 having inferior thermal conductivity, the heat of the high heat generating component can be radiated to the vehicle brackets (601, 606) via the bracket 120, and the power transistor which is a high heat generating component The temperature rise of 135 can be suppressed.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and various modifications are possible.

  For example, in the above embodiment, the optical disk reproducing apparatus is exemplified as the moving body mounting apparatus. However, the moving body mounting apparatus having a disk rotation drive mechanism including a hard disk may be used. Moreover, the mobile body mounting apparatus which has a mechanism which rotationally drives a cassette tape or a video tape may be sufficient. Furthermore, it may be a mobile body mounting device that does not have a disk rotation drive mechanism, such as a radio reception device or a television reception device.

  In the above embodiment, the heat radiation fixing portion 136 of the power transistor 135 is directly connected to the bracket 120. On the other hand, as shown in FIGS. 11 and 12, the power transistor 135 and the bracket 120 may be thermally connected via a heat radiating member 170 made of steel plate.

  Further, in the above embodiment, the material of the bracket 120 is made of a steel plate, but it may be a die-cast or the like made of other metal having good mechanical strength such as duralumin.

  In the above embodiment, the method of assembling the housing 140 is a fitting type, but the housing 140 may be provided with a screw insertion hole and fixed with screws.

  Further, in the above embodiment, the power transistor 135 is exemplified as the high heat generation component. However, as long as the temperature rise due to the power consumption may be harmful to the operation stability, other types of circuit components may be bracketed. 120 may be thermally connected.

It is XY sectional drawing of the conventional optical disk reproducing | regenerating apparatus. It is YZ sectional drawing of the conventional optical disk reproducing | regenerating apparatus. 1 is an external view of an optical disc playback apparatus according to an embodiment of the present invention. FIG. 4 is an exploded perspective view (No. 1) for explaining the configuration of the apparatus of FIG. 3. FIG. 4 is an exploded perspective view (No. 2) for explaining the configuration of the apparatus of FIG. 3. It is a figure for demonstrating arrangement | positioning of the attachment boss | hub provided in the bottom plate of the housing | casing of FIG.4 and FIG.5. It is a perspective view for demonstrating the attachment to the vehicle bracket of the apparatus of FIG. FIG. 4 is a perspective view after the apparatus of FIG. 3 is attached to a vehicle bracket. It is XY sectional drawing of the apparatus of FIG. It is YZ sectional drawing of the apparatus of FIG. It is a disassembled perspective view for demonstrating a modification. It is XY sectional drawing for demonstrating a modification.

Explanation of symbols

100 ... Optical disk playback device (device)
110 ... Optical disk drive (storage medium drive device)
120 ... Bracket (bracket member)
140 ... Housing (housing member)
170… heat dissipation member

Claims (7)

A device having a mechanical structure;
A printed circuit assembly in which circuit components for controlling the device are disposed on a printed wiring board;
High heat-generating parts with a large calorific value;
A metal bracket member connected to the device and connected to a metal fixing member prepared in the moving body to dissipate heat generated by the highly heat-generating component;
Comprising a; the device, and the resin housing member for housing the printed circuit assembly and the high heat generating component
The housing member is
A casing main body formed with a rectangular cutout;
A housing top plate portion that fits into the housing body portion;
A connecting portion of the bracket member with the fixing member is located in an opening formed when the housing top plate portion is fitted into the housing main body portion, and the bracket member is connected to the fixing member. Connected directly,
A moving body mounting device characterized by that.   The moving body mounting apparatus according to claim 1, wherein the fixing portion for heat dissipation of the high heat generating component is directly connected to the bracket member.   The moving body mounting apparatus according to claim 1, further comprising a metal heat radiating member that connects the heat radiating fixing portion of the high heat generating component and the bracket member.   The mobile body mounting apparatus according to any one of claims 1 to 3, wherein the high heat-generating component is at least one of the circuit components.   The mobile device mounting apparatus according to any one of claims 1 to 4, wherein the device is a storage medium drive device including a rotation drive mechanism that rotationally drives a recording medium.   The mobile body mounting apparatus according to claim 1, wherein the housing member is fixed to the bracket member.   The said bracket member is a product made from a steel plate, The moving body mounting apparatus as described in any one of Claims 1-6 characterized by the above-mentioned.

Images