JP2007336044A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of positioning a printed wiring board in its thickness direction even if a chassis is located from front to back and from side to side with respect to the printed wiring board. <P>SOLUTION: The rear side 4404 of the printed wiring board 44 faces an opening 58A of an insertion groove 58 between two lock walls 56. Then the rear side 4404 is inserted between first and second projections 60, 62 while the printed wiring board 44 is downwardly rocked by using the rear side 4404 located in the insertion groove 58A for a fulcrum. Since the first projection 60 is formed biased in the direction of the opening 58A of the insertion groove 58 from the second projection 62, the rear side 4404 can easily be inserted between the first and second projections 60, 62 while rocking the printed wiring board 44. When the rear side 4404 of the printed wiring board 44 is inserted to the insertion groove 58, the rear side 4404 is positioned by the first and second projections 60, 62 in its thickness direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic device, and more particularly to an electronic device in which a printed wiring board is disposed in a chassis.

Electronic devices often include a printed wiring board on which various electronic components are mounted.
For example, when the electronic device is a monitoring camera, a printed wiring board is disposed so as to close an upper portion or a side portion of a space in the chassis (see Patent Document 1).
On the other hand, various electronic components are mounted on the printed wiring board by soldering or the like, and the printed wiring board itself may have a deflection. In such a case, the printed wiring board may be in the thickness direction. Must be positioned.
Further, in many cases, various connectors are provided on the printed wiring board, and this connector is disposed so as to be exposed from the opening of the cover of the electronic device, but when external connectors are attached to or detached from these connectors, The printed wiring board may bend, and in such a case, the printed wiring board must be positioned in the thickness direction so that the connector is positioned in the opening of the cover.
JP-A-8-79585

The positioning of the printed wiring board in this case requires that the positioning part is applied to the printed wiring board from both directions in the thickness direction, and in order to insert the printed wiring board between the two positioning parts. The printed wiring board must be translated along its surface.
However, when the printed wiring board is arranged so as to close the upper portion of the space in the chassis as described above, the chassis is located on the front, rear, left and right sides of the printed wiring board, and the printed wiring board is arranged along the surface. Therefore, the printed wiring board cannot be positioned in the thickness direction.
The present invention has been devised in view of the above circumstances, and an object of the present invention is an electronic device capable of positioning a printed wiring board in the thickness direction even when the chassis is positioned on the front, rear, left and right sides. Is to provide.

  In order to achieve the above-described object, the present invention includes a chassis having a space in which an electronic component is accommodated, and a printed wiring board, and the printed wiring board faces the space so as to cover the space. In the electronic device disposed in the chassis, one surface in the thickness direction of the printed wiring board is an inner surface facing the space, and the other surface in the thickness direction of the printed wiring board is It is an outer surface, and the outline when the printed wiring board is viewed in plan is formed by a plurality of sides, and the chassis has a plurality of printed wiring boards in a state where the printed wiring board is arranged in the chassis. The wall portion is provided with a pair of locking walls projecting toward the substrate at an interval having a dimension larger than the thickness of the printed wiring board. An insertion groove into which the one side of the printed circuit board is inserted extends between the pair of locking walls, and a gap between the ends in the extending direction of the pair of locking walls is between the insertion grooves. A pair of latches on one of the pair of locking walls facing the inner surface of the printed wiring board in a state where the one side of the printed wiring board is inserted in the insertion groove A first protrusion protruding toward the other locking wall of the walls is provided, and the other locking wall of the pair of locking walls protrudes toward the one locking wall. 2 is provided, and the dimension between the tip of the first projection and the tip of the second projection in the thickness direction of the one side of the printed wiring board is such that the one side of the printed wiring board Inserted and removed between the two and positioned in the thickness direction of the printed wiring board The first protrusion is formed to be displaced in the opening direction of the insertion groove with respect to the second protrusion, and the one side of the printed wiring board is connected to the first protrusion. The second projection is positioned in the thickness direction of the printed wiring board.

  According to the present invention, the insertion groove having the second protrusion and the first protrusion displaced in the opening direction with respect to the second protrusion is used to position the printed circuit board on the lower side and position the upper side. Therefore, when the printed wiring board is inserted into the insertion groove, no parallel movement is required and the printed wiring board can be swung around the side as a fulcrum. Even if the chassis is positioned on the printed wiring board, the printed wiring board can be inserted into the insertion groove, and positioning in two directions in the thickness direction of the printed wiring board can be performed.

Hereinafter, an embodiment when the electronic device is a surveillance camera will be described.
1 is a perspective view of the surveillance camera 10 as seen from the front, FIG. 2 is a perspective view of the surveillance camera 10 as seen from the rear, and FIG. 3 is a perspective view of the surveillance camera 10 as seen from the front with the cover 46 removed. 4 is a perspective view of the surveillance camera 10 as viewed from the rear with the cover 46 removed.
FIG. 5 is a perspective view showing a state where the printed wiring board 44 is disposed on the rear wall portion 52 of the chassis 42, and FIG. 6 is a perspective view of the rear wall portion 52 of the chassis 42.
FIG. 7 is an enlarged view of the locking wall 56, and FIG. 8 is an explanatory view showing an example in which the attachment piece 72 is provided on the printed wiring board 44.
As shown in FIGS. 1 and 2, the surveillance camera 10 is attached to a ceiling, a wall, a pillar, or the like via various conventionally known mounting brackets.
The surveillance camera 10 includes a camera body 12 and a lens barrel 14 provided at the front of the camera body 12.
The camera body 12 is provided with an image sensor 16 (see FIG. 11) that captures a subject image.
A photographic optical system 18 that guides a subject image to the image sensor 16 is housed in a lens barrel 14. In this embodiment, the lens barrel 14 is detachably mounted on the front surface of the camera body 12.

FIG. 11 is a block diagram showing the configuration of the control system of the monitoring camera 10.
As shown in FIG. 11, the monitoring camera 10 includes an image processing unit 20, a network communication unit 22, a network connector 24, an interface communication unit 26, an interface connector 28, a power supply unit 30, a power input connector 32, An audio signal processing unit 34, a video processing unit 35, an audio input connector 36, an audio output connector 38, an analog video signal output connector 39, a control unit 40, and the like are provided.
The image processing unit 20 performs predetermined signal processing on the imaging signal supplied from the imaging element 16 to generate predetermined image data (still image data, moving image data). The generated image data is transmitted to the control unit 40. And an analog video signal is generated from the image data and supplied to the analog video signal output connector 39. Therefore, it is possible to display captured image data by connecting a display device or the like to the connector 39.
The network communication unit 22 is connected to an external device (a terminal device having a display function of image data such as a personal computer) via a network connector 24 and a network cable (not shown) connected to the network connector 24. By bidirectionally communicating, information is exchanged between the control unit 40 and the external device.
In the present embodiment, the network communication unit 22 performs communication using, for example, a LAN or Ethernet (registered trademark).
The information to be transmitted to the external device includes image data and audio data to be described later, and the information received from the external device is a control command for instructing adjustment of brightness and color tone of the captured image data, or Audio data input to an external device is included.
The interface communication unit 26 is connected to the interface connector 28, and exchanges information between the control unit 40 and the external device by bidirectionally communicating with the external device via the interface connector 28. For example, it is used for maintenance work of the monitoring camera 10.

The power supply unit 30 is connected to the connector 32, and adjusts the power supplied from the external power supply device via the power cable (not shown) via the connector 32 to a predetermined voltage and current, and the imaging device 16, the image processing unit 20, the network communication unit 22, the interface communication unit 26, the audio signal processing unit 34, the control unit 40, and the like.
In the present embodiment, the power supply unit 30 can selectively use three types of power. That is, any one of three types of AC power or DC power supplied via the connector 32 and power supplied via the network connector 28 is used.

The audio signal processing unit 34 is controlled by the control unit 40 and is connected to the audio input connector 36 and the audio output connector 38.
The audio signal processing unit 34 receives an audio signal input from a microphone or the like connected to the audio input connector 36 (for example, an audio signal generated by collecting sounds in an environment where the monitoring camera 10 is installed). A function for converting to a digital signal and supplying the digital signal to the control unit 40, and an audio signal of the digital signal supplied from the control unit 40 (for example, an audio signal for generating an alarm sound) to an analog signal for audio output It has a function of generating sound by being supplied to a speaker or the like connected to the connector 38.

The control unit 40 controls the image processing unit 20, the network communication unit 22, the interface communication unit 26, the power supply unit 30, the audio signal processing unit 34, and the like. The CPU, ROM, RAM, and interface LSI are installed in the control unit 40. It is comprised including the microcomputer containing.
That is, the control unit 40 transmits the image data supplied from the image processing unit 20 and the audio signal input from the audio input connector 36 via the audio signal processing unit 34 to the network communication unit 22 and the network connector 24. Via an external device.
In addition, the control unit 40 controls the image processing unit 20 based on control commands supplied from an external device via the network connector 24 and the network communication unit 22, and controls the brightness and tone of image data captured. adjust.
In addition, the control unit 40 supplies sound data supplied from an external device via the network connector 24 and the network communication unit 22 to the speaker via the audio signal processing unit 34 and the audio output connector 38 to generate sound. generate.

As shown in FIGS. 3 and 4, the camera body 12 includes a chassis 42 having a space 40 in which various electronic components are accommodated, a printed wiring board 44, and a cover 46 that constitutes an exterior attached to the chassis 42. (See FIGS. 1 and 2).
As shown in FIGS. 3 and 4, the chassis 42 has a bottom portion 48 and side portions that stand from both sides of the bottom portion 48 and face each other. In the present embodiment, the front wall portion 50 and the rear wall portion 52 are erected from the front and rear portions of the bottom portion 48, respectively. Therefore, one side portion has the front wall portion 50 and the other side portion is the rear portion. A wall 52 is provided.
The bottom part 48, the front wall part 50, and the rear wall part 52 are each made of sheet metal and plated, and the front wall part 50 and the rear wall part 52 are, for example, front and rear of the bottom part 48 as shown in FIG. It is connected to the part via a screw N1.

The printed wiring board 44 is disposed on the chassis 42 with its surface facing the space 40 so as to cover the upper surface of the space 40. Specifically, as shown in FIGS. 3 and 4, the printed wiring board 44 is in a state in which the optical axis of the photographing optical system 18 is horizontally oriented, the bottom surface of the monitoring camera 10 is directed downward, and the top surface thereof is directed upward. Therefore, the printed circuit board 44 extends in the horizontal direction across the front, rear, left, and right inside the monitoring camera 10, and therefore, the printed wiring board 44 is arranged in parallel to the bottom surface and the top surface of the monitoring camera 10.
One surface in the thickness direction of the printed wiring board 44 is an inner surface 44A facing the space 40, and the other surface in the thickness direction of the printed wiring board 44 is an outer surface 44B. That is, the inner surface 44A faces downward and the outer surface 44B faces upward.
The outline of the printed wiring board 44 when viewed in plan is formed by a plurality of sides. In the present embodiment, when viewed from the top, it has a rectangular shape and has two short sides and two long sides. One short side of the two short sides is a front side 4402 disposed at the front portion of the chassis 42, and the other short side of the two short sides is a rear side disposed at the rear portion of the chassis 42. 4404.
In other words, the printed wiring board 44 is disposed such that the front side 4402 is located above the front wall portion 50 and the rear side 4404 is located above the rear wall portion 52.
As shown in FIGS. 3 and 4, electronic components such as ICs, LSIs, resistors, and capacitors are mounted on the printed wiring board 44 by soldering or the like, and the network connector 24 is mounted on the rear side 4404 of the printed wiring board 44. An audio input connector 36 and an audio output connector 38 are provided.

As shown in FIGS. 3 to 6, the thickness of the printed wiring board 44 is larger than the thickness of the printed wiring board 44 at the location of the rear wall portion 52 facing the rear side 4404 of the printed wiring board 44 in a state where the printed wiring board 44 is disposed on the chassis 42. A pair of locking walls 56 projecting toward the printed wiring board 44 at an interval of dimensions are bent, and the pair of locking walls 56 are formed integrally with the rear wall portion 52.
As shown in FIG. 6, an insertion groove 58 into which the rear side 4404 of the printed wiring board 44 is inserted extends between the pair of locking walls 56, and the pair of locking walls 56 extends. Between the front ends in the direction is an opening 58A of the insertion groove 58.
In a state where the rear side 4404 of the printed wiring board 44 is inserted into the insertion groove 58, a pair of locking walls 56 is disposed on one locking wall 56 of the pair of locking walls 56 facing the inner surface 44 </ b> A of the printed wiring board 44. The 1st protrusion 60 which protrudes toward the other locking wall 56 is provided.
A second protrusion 62 projecting toward one locking wall 56 is provided on the other locking wall 56 of the pair of locking walls 56.
The distance between the first protrusion 60 and the tip of the locking wall 56 provided with the first protrusion 60 gradually increases the distance between the pair of locking walls 56 as it reaches the tip of the locking wall 56. It is formed with the inclined surface 64 which inclines.
The distance between the second protrusion 62 and the tip of the locking wall 56 provided with the second protrusion 62 gradually increases the distance between the pair of locking walls 56 as it reaches the tip of the locking wall 56. It is formed with the inclined surface 66 which inclines.
The pair of locking walls 56 are provided in a plurality so as to support a plurality of positions spaced in the longitudinal direction of the rear side 4404, and in the present embodiment, provided at both ends in the width direction of the rear wall 52, The left and right ends of the rear side 4404 are supported.

As shown in FIG. 7, the dimension L between the tip 60A of the first protrusion 60 and the tip 62A of the second protrusion 62 in the thickness direction of the rear side 4404 of the printed wiring board 44 is as follows. The rear side 4404 is the same as or thicker than the rear side 4404 of the printed wiring board 44 so that the rear side 4404 is inserted and removed between the protrusions 60 and 62 and positioned in the thickness direction of the printed wiring board 44. Is formed with a slightly larger value.
Further, the first protrusion 60 is formed to be displaced from the second protrusion 62 in the direction of the opening 58 </ b> A of the insertion groove 58.
By inserting the rear side 4404 of the printed wiring board 44 into the insertion groove 58, the printed wiring board 44 is positioned in the thickness direction of the printed wiring board 44 by the first protrusion 60 and the second protrusion 62.
And in the state of being positioned in this way, each connector 24, as shown in FIGS. 4 and 6, at the location of the rear wall portion 52 facing the three connectors 24, 36, 38 on the rear side 4404 of the printed wiring board 44. Openings 54 are provided to allow the connectors 36, 38 to face the outside of the chassis 42, and the connectors 24, 36, 38 are exposed to the outside of the cover 46 as shown in FIG. Each opening 54A is provided.
Note that the rear side 4404 is positioned in the thickness direction of the printed wiring board 44 by the first protrusion 60 and the second protrusion 62, but in detail, in the present embodiment, the connectors 24, 36, and 38 are The rear side 4404 is positioned so as to be located within a certain range in the thickness direction of the printed wiring board 44 so as to face the opening 54 of the chassis 42 and the opening 54A of the cover 46.

The printed wiring board 44 is attached to the chassis 42 with screws in a state where the rear side 4404 of the printed wiring board 44 is positioned by the first protrusion 60 and the second protrusion 62.
In this embodiment, as shown in FIGS. 3 and 4, the left and right sides of the rear portion of the printed wiring board 44 are placed on the attachment pieces 68 of the rear wall portion 52, and the left and right sides of the front portion of the printed wiring board 44 are Both sides are placed on the mounting piece 70 of the front wall 50 and are attached to the mounting pieces 68 and 70 by screws N2 and N3, respectively.
Further, in the present embodiment, as shown in FIGS. 8 and 10, the rear side 4404 of the printed wiring board 44 is brought into contact with the rear wall portion 52 and the printed wiring board 44 is positioned in the front-rear direction. The printed wiring board 44 is positioned in the front-rear direction by leaving a gap between the rear side 4404 and the rear wall 52 of the printed wiring board 44 and protruding from one mounting piece 70 as shown in FIG. The provided positioning pins 7050 for front / rear positioning are fitted into the front / rear positioning holes 4450 of the printed wiring board 44, and screws N3 are inserted into the front / rear positioning long grooves 4452 provided in the printed wiring board 44. Is inserted into the screw hole of the other attachment piece 70, and the shaft portion of the screw N3 and the long groove 4452 are aligned with each other.

Further, in the present embodiment, as shown in FIGS. 3 and 6, the upper surfaces 68A and 70A of the attachment pieces 68 and 70 are formed as positioning surfaces.
Therefore, in the rear part of the printed wiring board 44, the first protrusion 60 and the second protrusion 62 of the insertion groove 58 are positioning protrusions, and the upper surface 68A of the attachment piece 68 is also a positioning surface. When the left and right sides of the rear portion of the printed wiring board 44 are placed on the mounting piece 68, a gap of 0.1 mm is secured between the inner surface 44A of the printed wiring board 44 and the tip 60A of the first protrusion 60. In addition, a 0.1 mm gap is ensured between the outer surface 44B of the printed wiring board 44 and the tip 62A of the second protrusion 62.

  As shown in FIG. 8, a long groove 7202 extending in the vertical direction is formed in the mounting piece 72 that is suspended from the printed wiring board 44, and is positioned by the first protrusion 60 and the second protrusion 62. It goes without saying that the printed wiring board 44 may be attached to the chassis 42 by fastening the screw N4 that passes through the long groove 7202 to the location of the rear wall portion 52. In this case, the dimension L between the front end 60A of the first protrusion 60 and the front end 62A of the second protrusion 62 is, for example, the same as the thickness of the rear side 4404 of the printed wiring board 44 or more than this thickness. The rear side 4404 of the printed wiring board 44 is positioned with high accuracy only by the first protrusion 60 and the second protrusion 62.

Next, the operation will be described.
FIG. 9 and FIG. 10 are explanatory views for attaching the printed wiring board 44.
When the printed wiring board 44 is attached to the chassis 42, the printed wiring board 44 is tilted so that the rear side 4404 of the printed wiring board 44 is below the front side 4402, as shown by a two-dot chain line in FIG. 9. The rear side 4404 of the wiring board 44 is made to face the opening 58 </ b> A of the insertion groove 58.
Then, as shown by a solid line in FIG. 9, the first and second rear sides 4404 are swung downward while swinging the front side 4402 of the printed wiring board 44 downward with the rear side 4404 positioned in the insertion groove 58A as a fulcrum. Insert between the protrusions 60 and 62.
At this time, since the first protrusion 60 is deviated from the second protrusion 62 in the direction of the opening 58A of the insertion groove 58, the printed wiring board 44 is swung from an inclined state while being swung. Since the side 4404 can be easily inserted between the first and second protrusions 60 and 62, the insertion operation of the printed wiring board 44 into the insertion groove 58 is smoothly performed.
Further, since the rear side 4404 of the printed wiring board 44 is smoothly guided from the opening 58A to the insertion groove 58 by the inclined surfaces 64 and 66 of the locking walls 56, the insertion operation of the printed wiring board 44 into the insertion groove 58 is performed. Is done smoothly.
Then, as shown in FIG. 10, when the rear side 4404 of the printed wiring board 44 is inserted into the insertion groove 58, the rear side 4404 is positioned in the thickness direction by the first protrusion 60 and the second protrusion 62. The Specifically, the rear side 4404 is positioned in both directions of downward positioning and upward positioning.
In the present embodiment, as shown in FIG. 10, the rear end of the rear side 4404 is brought into contact with the inner surface of the rear wall portion 52 so that the positioning in the front-rear direction is also performed.

In this manner, the inner surface 44A of the printed wiring board 44 is mounted on the upper surfaces 68A and 70A of the mounting pieces 68 and 70 with the rear side 4404 being positioned in the thickness direction by the first protrusion 60 and the second protrusion 62. Put.
Then, the screws N2 and N3 through which the printed wiring board 44 is inserted are fastened to the mounting pieces 68 and 70, whereby the mounting of the printed wiring board 44 to the chassis 42 is completed.

According to the present embodiment, the following effects are achieved.
Various electronic components are mounted on the printed wiring board 44 by soldering or the like, and there is a possibility that the printed wiring board 44 itself has a deflection, and the printed wiring board 44 on which the connectors 24, 36, 38, etc. are arranged. The rear side 4404 needs to be positioned in both directions of the downward positioning and the upward positioning with respect to the chassis 42.
Further, when the connector of the connection cable is attached to / detached from each connector 24, 36, 38 and a stress in the thickness direction is applied to the printed wiring board 44 via each connector 24, 36, 38, the printed wiring board 44 bends. The rear side 4404 of the printed wiring board 44 on which the connectors 24, 36, 38, etc. are arranged needs to be positioned in both directions of the downward positioning and the upward positioning with respect to the chassis 42. It becomes.
As described above, when positioning in two directions in the thickness direction of the printed wiring board 44 by the two positioning portions, the printed wiring board 44 must be moved in parallel along this plane in a plane orthogonal to the two directions. Positioning cannot be performed.
However, as shown in FIGS. 3 and 4, the front wall portion 50 and the rear wall portion 52 are positioned before and after the printed wiring board 44, and the printed wiring board 44 is moved in parallel along the plane described above. I can't let you.
In the present embodiment, the insertion groove 58 having the second protrusion 62 and the first protrusion 60 deviated in the direction of the opening 58 </ b> A from the second protrusion 62 causes the printed wiring board 44 to move below the rear side 4404. Therefore, when the printed wiring board 44 is inserted into the insertion groove 58, the above-mentioned parallel movement is not required, and the printed wiring is used with the rear side 4404 as a fulcrum. Therefore, the printed wiring board 44 can be inserted into the insertion groove 58 even when the front wall portion 50 and the rear wall portion 52 are positioned before and after the printed wiring board 44. The positioning in the two directions in the thickness direction of the printed wiring board 44 can be performed.

Therefore, even when the printed wiring board 44 is bent due to soldering or the like, the rear side 4404 on which the connectors 24, 36, and 38 are disposed is caused by the first and second protrusions 60 and 62. Since the connectors 24, 36, and 38 are positioned in the thickness direction, the connectors 24, 36, and 38 can be accurately arranged with respect to the opening 54 of the rear wall 52 and the opening 54A of the cover 46, so as to ensure assembly accuracy. It will be advantageous.
Further, even if stress in the thickness direction is applied to the printed wiring board 44 due to attachment / detachment of the connector of the connection cable to each connector 24, 36, 38, the deformation in the thickness direction of the printed wiring board 44 is the first. In particular, the rear side 4404 is positioned within a range in which the connectors 24, 36, and 38 are located in the opening 54 of the chassis 42 and the opening 54 </ b> A of the cover 46. It is possible to prevent an excessive force from being applied to the wiring board 44, which is advantageous in protecting the printed wiring board 44.
In the present embodiment, since the attachment piece 68 is the positioning surface of the rear side 4404, the first protrusion 60 prevents this displacement when the rear side 4404 is displaced downward due to long-term use or the like. The connector 24, 36, 38 can be reliably aligned with the opening 54 of the rear wall 52 and the opening 54 A of the cover 46.

In the present embodiment, the case where two insertion grooves 58 are provided has been described. However, the number of insertion grooves 58 may be a number sufficient to position the printed wiring board 44 in the thickness direction. The number of the insertion grooves 58 may be one or three or more.
The material forming the bottom 48, the front wall 50, and the rear wall 52 may be any synthetic resin material as long as it has rigidity. Therefore, the rear wall 52 is formed of a synthetic resin material. If there are, the pair of locking walls 56 are also made of synthetic resin.
In this embodiment, the case where the electronic device is a monitoring camera has been described. However, the present invention is not limited to the monitoring camera, and can be widely applied to electronic devices in which a printed wiring board is arranged in a chassis. is there.

It is the perspective view which looked at the surveillance camera 10 from the front. It is the perspective view which looked at the surveillance camera 10 from back. It is the perspective view which looked at surveillance camera 10 from the front in the state where cover 46 was removed. It is the perspective view which looked at surveillance camera 10 from the back in the state where cover 46 was removed. 3 is a perspective view showing a state in which a printed wiring board 44 is arranged on a rear wall portion 52 of a chassis 42. FIG. 3 is a perspective view of a rear wall portion 52 of a chassis 42. FIG. 4 is an enlarged view of a locking wall 56. FIG. It is explanatory drawing which shows the example which provided the attachment piece 72 in the printed wiring board 44. FIG. FIG. 4 is an explanatory view of attachment of a printed wiring board 44. FIG. 4 is an explanatory view of attachment of a printed wiring board 44. 2 is a block diagram illustrating a configuration of a control system of a monitoring camera 10. FIG.

Explanation of symbols

10 ... surveillance camera, 40 ... space, 42 ... chassis, 44 ... printed wiring board, 44A ... inner surface, 44B ... outer surface, 4402 ... front side, 4404 ... rear side, 56 ... locking Wall, 58... Insertion groove, 58 A... Opening, 60... First projection, 62.

Claims (10)

The electronic device is provided with a chassis having a space in which electronic components are accommodated, and a printed wiring board, and the printed wiring board is disposed in the chassis with its surface facing the space so as to cover the space. ,
One surface in the thickness direction of the printed wiring board is an inner surface facing the space, and the other surface in the thickness direction of the printed wiring board is an outer surface,
The outline when the printed wiring board is viewed in plan is formed of a plurality of sides,
The chassis has a wall portion facing one side of the plurality of sides of the printed wiring board in a state where the printed wiring board is arranged in the chassis,
The wall portion is provided with a pair of locking walls projecting toward the substrate with an interval larger than the thickness of the printed wiring board,
An insertion groove into which the one side of the printed wiring board is inserted extends between the pair of locking walls, and a gap between the ends in the extending direction of the pair of locking walls is between the insertion grooves. An opening,
One of the pair of locking walls facing the inner surface of the printed wiring board in a state where the one side of the printed wiring board is inserted into the insertion groove, and the other of the pair of locking walls. A first protrusion protruding toward the locking wall is provided;
A second protrusion protruding toward the one locking wall is provided on the other locking wall of the pair of locking walls,
The dimension between the tip of the first protrusion and the tip of the second protrusion in the thickness direction of the one side of the printed wiring board is such that the one side of the printed wiring board is inserted and removed between them. It is formed with a value that is positioned in the thickness direction of the printed wiring board,
The first protrusion is formed to be deviated in the opening direction of the insertion groove from the second protrusion,
The one side of the printed wiring board is positioned in the thickness direction of the printed wiring board by the first protrusion and the second protrusion.
An electronic device characterized by that. The location of the locking wall between the first projection and the tip of the locking wall provided with the first projection gradually increases as the pair of locking walls reach the tip of the locking wall. Formed with an inclined surface that increases the distance between,
The location of the locking wall between the second projection and the tip of the locking wall provided with the second projection is gradually increased between the pair of locking walls as it reaches the tip of the locking wall. It is formed with an inclined surface that increases the distance between,
The electronic device according to claim 1. A plurality of the pair of locking walls are provided so as to support a plurality of locations spaced in the longitudinal direction of the one side.
The electronic device according to claim 1. The chassis has a bottom portion and side portions that stand from both sides of the bottom portion and face each other.
One of the side portions on both sides has the wall portion,
The pair of locking walls are provided on the wall portion,
The electronic device according to claim 1. The chassis has a bottom portion and side portions that stand from both sides of the bottom portion and face each other.
One of the side portions on both sides has the wall portion,
The pair of locking walls are respectively provided at both ends in the width direction of the wall portion.
The electronic device according to claim 1. The chassis has a bottom portion and side portions that stand from both sides of the bottom portion and face each other.
One of the side portions on both sides has the wall portion,
The pair of locking walls are respectively provided at both ends in the width direction of the wall portion,
The printed wiring board in the direction perpendicular to the thickness direction of the printed wiring board and the extending direction of the one side is formed by inserting the one side of the printed wiring board into the insertion groove and abutting the one side against the wall portion. The board is positioned,
The electronic device according to claim 1. The printed wiring board is attached to the chassis with screws in a state where the one side of the printed wiring board is positioned by the first protrusion and the second protrusion.
The electronic device according to claim 1. A cover attached to the chassis;
A connector is provided on the one side of the printed wiring board,
At the location of the cover facing the connector, an opening is provided for allowing the connector to face the outside of the cover.
The electronic device according to claim 1. The chassis has a mounting surface facing the inner surface in the vicinity of the one side of the printed wiring board in a state where the printed wiring board is disposed in the chassis;
The mounting surface is a positioning surface in the thickness direction of the printed wiring board,
The printed wiring board in a state where the one side of the printed wiring board is inserted between the first protrusion and the second protrusion, and an inner surface of the printed wiring board is placed on the mounting surface. A gap is secured between the inner surface and the first protrusion and between the outer surface and the second protrusion,
A cover attached to the chassis;
A connector is provided on the one side of the printed wiring board,
An opening for allowing the connector to face the outside of the cover is provided at a location of the cover facing the connector,
The one side is positioned in the thickness direction of the printed wiring board by the first protrusion and the second protrusion so that the connector is positioned in the opening.
The electronic device according to claim 1. The chassis has a mounting surface facing the inner surface in the vicinity of the one side of the printed wiring board in a state where the printed wiring board is disposed in the chassis;
The mounting surface is a positioning surface in the thickness direction of the printed wiring board,
The printed wiring board in a state where the one side of the printed wiring board is inserted between the first protrusion and the second protrusion, and an inner surface of the printed wiring board is placed on the mounting surface. A gap is secured between the inner surface and the first protrusion and between the outer surface and the second protrusion,
A cover attached to the chassis;
A connector is provided on the one side of the printed wiring board,
An opening for allowing the connector to face the outside of the cover is provided at each of the wall portion and the cover portion facing the connector,
The one side is positioned in the thickness direction of the printed wiring board by the first protrusion and the second protrusion so that the connector is positioned in the opening.
The electronic device according to claim 1.

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