electronic machines

Abstract

To provide an electronic apparatus with a fire spread prevention structure that can flexibly respond to changes in maintainability and specifications.SOLUTION: An electronic apparatus according to an embodiment of the present invention includes a casing, a circuit unit equipped with an electronic component, an accommodating member disposed in the casing and accommodating the circuit unit, a barrier member for preventing the spread of fire disposed opposite to a part of the accommodating member, and a support mechanism that movably supports the barrier member inside the casing.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an electronic device having a fire spread prevention structure.

Background Art

[0002] There is known an electronic device having a structure for preventing fire from spreading outside the housing when an electronic component or the like disposed inside the housing catches fire due to some cause. For example, Patent Document 1 discloses a control device including a printed circuit board on which electrical components constituting a primary power supply circuit are assembled, a storage case for storing the printed circuit board, an exterior case for covering the storage case, and a partition wall as a fire spread prevention wall for forming a primary power space so as to surround the electrical components.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional fire spread prevention structures are fixedly arranged inside the housing. For this reason, for example, during maintenance inside the device, the workability may be impaired due to the fire spread prevention structure. Further, there is a problem that it is impossible to flexibly cope with changes in the wiring amount and the wiring layout according to the specifications of the electronic device.

[0005] In view of the above circumstances, an object of the present invention is to provide an electronic device having a fire spread prevention structure that enables improvement in maintainability and flexible response to specification changes.

Means for Solving the Problems

[0006] An electronic device according to one embodiment of the present invention comprises a housing, a circuit unit on which electronic components are mounted, a housing member disposed in the housing and housing the circuit unit, a fire-spread prevention barrier member disposed opposite a part of the housing member, and a support mechanism that supports the barrier member so as to be movable inside the housing.

[0007] The electronic device according to the present invention is equipped with a support mechanism that movably supports a fire-spread prevention barrier member inside the housing. Therefore, maintainability can be improved by moving the barrier member to a position suitable for maintenance work. Furthermore, changes in the amount of wiring or the wiring layout can be flexibly accommodated by changing the position of the barrier member.

[0008] The barrier member may be positioned below the housing member and may have a receiving surface for receiving objects falling from the circuit unit. This allows the barrier member to catch any burnt or fallen components even if the circuit unit catches fire, preventing the fire from spreading to the mounting surface of the electronic device.

[0009] The housing may have a bottom portion provided with a ventilation opening facing the barrier member. The barrier member may be positioned between the case member and the ventilation opening.

[0010] The support mechanism may support the barrier member so that it can move within a range where the height from the bottom surface is between a first height and a second height. The bottom portion may have a filter member that covers the ventilation opening. In this case, the barrier member may have legs that contact the filter member at the first height position.

[0011] The support mechanism may include a first support member and a second support member. The first support member is installed on the bottom surface of the housing and supports one side of the barrier member. The second support member is installed on the bottom surface of the housing and supports the other side of the barrier member opposite to the side of the barrier member.

[0012] The first support member may include a first fastener that screws into the one side portion. The second support member may include a second fastener that screws into the other side portion and is arranged non-coaxially with the first fastener.

[0013] When the vertical direction is defined as the first axial direction, the direction in which the first support member and the second support member face each other is defined as the second axial direction, and the direction perpendicular to the first axial direction and the second axial direction is defined as the third axial direction, the support mechanism may support the barrier member so as to be movable in the first axial direction, the third axial direction, or around the second axis. [Effects of the Invention]

[0014] According to the present invention, it becomes possible to improve maintainability and respond flexibly to changes in specifications. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view showing the entire electronic device according to the first embodiment of the present invention. [Figure 2] This is a perspective view showing the internal structure of the above-mentioned electronic device after removing a part of its casing. [Figure 3] Figure 2 is a side view of the electronic device shown. [Figure 4] This is a perspective view showing the housing member in the above-mentioned electronic device before the circuit unit is housed inside. [Figure 5] This is a perspective view showing the internal configuration of the electronic device described above, with some parts of the enclosure, such as circuit units, removed. [Figure 6] This is a perspective view of the barrier member and support mechanism in the above-mentioned electronic device. [Figure 7] This is a side view of the barrier member and support mechanism described above. [Figure 8] This is a plan view of the barrier member and support mechanism described above. [Figure 9] This is a perspective view of the barrier member shown above. [Figure 10]A front view of the main part inside the housing of the electronic device according to the second embodiment of the present invention, showing a barrier member and a support mechanism for supporting the same. [Figure 11] A front view of the above support mechanism. [Figure 12] A front view of the main part inside the housing showing the state where the above barrier member is fixed at the uppermost position. [Figure 13] A front view of the main part inside the housing showing the state where the above barrier member is fixed at the uppermost position. [Figure 14] A front view of the main part inside the housing showing the state where the above barrier member is fixed in an inclined manner.

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described while referring to the drawings.

[0017] <First Embodiment> FIG. 1 is a perspective view showing the entirety of an electronic device 100 according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the internal structure when a part of the housing 10 of the electronic device 100 is removed, and FIG. 3 is a side view thereof. In the figure, the X-axis, Y-axis, and Z-axis are orthogonal to each other, and the X-axis direction indicates the width direction of the electronic device 100, the Y-axis direction indicates the depth direction of the electronic device 100, and the Z-axis direction indicates the height direction of the electronic device 100. The electronic device 100 of the present embodiment will be described by taking, for example, the case where it is a command device connected to an operation panel installed in a command room of a fire department.

[0018] [Configuration of Electronic Device] As shown in FIGS. 1 and 2, the electronic device 100 of the present embodiment includes a housing 10, a circuit unit 20, a housing member 30, a barrier member 40, and a support mechanism 50.

[0019] (Housing) The housing 10 has a rectangular parallelepiped shape with a front section 11, a rear section 12, a right side section 13, a left side section 14, a bottom section 15, and a top section 16. The housing 10 is made of a metal material such as stainless steel or an aluminum alloy.

[0020] In this embodiment, the housing 10 has a left side portion 14, a bottom portion 15, and a top portion 16 that are integrally formed, and the front portion 11, rear portion 12, and right side portion 13 are configured to be individually separable.

[0021] (Circuit unit) The circuit unit 20 is an assembly of multiple printed circuit boards 21 equipped with electronic components, forming power supply circuits, arithmetic circuits, and drive circuits. These electronic components include arithmetic elements such as a CPU (Control Processing Unit), memory elements such as ROM (Read Only Memory) and RAM (Random Access Memory), connector components, power semiconductor components such as transistors and diodes for power supply circuits, and passive components such as inductors and capacitors. Some of these electronic components generate heat when energized. Each printed circuit board 21 is connected to the control panel, power supply, etc., via wiring cables 22 (partially shown in the diagram).

[0022] (Storage component) The housing member 30 is positioned inside the housing 10 and houses the circuit unit 20. Figure 4 is a perspective view of the housing member 30 before the circuit unit 20 is housed inside. The housing member 30 houses multiple printed circuit boards 21 that make up the circuit unit 20, stacked in the width direction (X-axis direction) of the housing 10 (see Figure 2).

[0023] As shown in Figure 4, the housing member 30 is rectangular in shape, with the right side portion 31 and the left side portion 32 formed from rectangular frame-shaped plates, and the bottom portion 33 and the top portion 34 formed from multiple plates spaced apart and sandwiched between the right side portion 31 and the left side portion 32. The housing member 30 is made of a non-combustible material, such as an iron-based metal material like stainless steel or a non-ferrous metal material like an aluminum alloy. The circuit unit 20 (printed circuit board 21) is mounted in the housing member 30 along the depth direction of the housing 10 (the +Y direction in Figure 4), and the inside of the housing member 30 allows for air circulation in the vertical direction (Z-axis direction).

[0024] Figure 5 is a perspective view showing the internal configuration of the electronic device 100 when a part of the housing 10, the circuit unit 20, and the barrier member 40 (described later) are removed. In this embodiment, the bottom surface 15 of the housing 10 is provided with a ventilation opening 151 consisting of multiple rows of through holes h, each with multiple through holes arranged in the X-axis direction, and the top surface 16 of the housing 10 is provided with a blower fan 161 that is electrically connected to the circuit unit 20.

[0025] The ventilation opening 151 is provided on the bottom surface 15 of the housing 10, which faces the bottom surface 33 of the housing member 30 in the vertical direction (Z-axis direction). The blower fan 161 draws outside air into the housing 10 through the ventilation opening 151 and discharges the drawn-in outside air through the inside of the housing member 30 from the top surface 16 of the housing 10, which faces the top surface 34 of the housing member 30. This improves the cooling performance of the circuit unit 20 housed inside the housing member 30.

[0026] As shown in Figures 4 to 6, the bottom surface 15 of the housing 10 has a filter member 152 that covers the ventilation opening 151. The filter member 152 is positioned between the ventilation opening 151 and the barrier member 40. The filter member 152 is for removing foreign matter from the outside air introduced into the housing 10 through the ventilation opening 151, and is typically made of synthetic fibers or synthetic resin.

[0027] (Barrier material) Figure 6 is a perspective view of the barrier member 40 and support mechanism 50, Figure 7 is a side view thereof, Figure 8 is a plan view thereof, and Figure 9 is a perspective view of the barrier member 40.

[0028] The barrier member 40 is a fire-preventing plate member positioned opposite a part of the housing member 30 (the bottom surface 33 in this embodiment). In this embodiment, the barrier member 40 is positioned below the housing member 30. The barrier member 40 is made of a non-combustible material and prevents the spread of fire to other components within the electronic device 100 or to the outside of the electronic device 100 caused by ignition of the circuit unit 20 due to leakage current, short circuits, surges, etc.

[0029] Furthermore, a metal plate member 35 is attached to the right side portion 31 of the housing member 30 to cover its opening. This plate member 35 also functions as a barrier to prevent the spread of fire caused by the ignition of the circuit unit 20. A plate member similar to the plate member 35 may also be attached to the left side portion 32 of the housing member 30.

[0030] The barrier member 40 is formed by press-forming a plate material made of an iron-based alloy such as stainless steel or a non-ferrous metal material with a relatively high melting point into the form shown in Figure 9. The barrier member 40 has a receiving surface portion 41 that receives objects falling from the circuit unit 20, and a wall portion 42 that is formed by folding back from the peripheral edge of the receiving surface portion 41 toward the housing member 30.

[0031] The receiving surface portion 41 corresponds to the main body portion of the barrier member 40, and as shown in Figure 9, it is formed in a rectangular shape having two short sides 41a1, 41a2 parallel to the X-axis direction and two long sides 41b1, 41b2 parallel to the Y-axis direction. The wall portion 42 has the function of increasing the strength of the receiving surface portion 41 and preventing the falling objects from falling from the receiving surface portion 41.

[0032] The receiving surface 41 has an area equal to or larger than the area of ​​the bottom surface 33 of the housing member 30, and shields the bottom surface 33 of the housing member 30 from the bottom surface 15 of the housing 10. If the circuit unit 20 housed in the housing member 30 catches fire, the receiving surface 41 catches burnt parts and sparks that fall or fly from the circuit unit 20, preventing them from reaching the bottom surface 15 of the housing 10. This prevents the fire from spreading to the filter member 152 positioned between the vent 151 and the barrier member 40, or from spreading the fire to the surrounding area of ​​the electronic device 100 due to burning material leaking out of the housing 10 from the vent 151.

[0033] The barrier member 40 further has a first leg portion 43a and a second leg portion 43b. The first leg portion 43a and the second leg portion 43b each have a vertical plate portion 431 that extends parallel to the vertical direction (Z-axis direction) toward the bottom surface portion 15 of the housing 10 from two short sides 41a1, 41a2 of the receiving surface portion 41, and a horizontal plate portion 432 that extends parallel to the short side direction (X-axis direction) from the tip (lower end) of the vertical plate portion 431.

[0034] The vertical plate portions 431 of the first leg portion 43a and the second leg portion 43b are each formed to the same length. The vertical plate portion 431 of the first leg portion 43a is positioned offset from the center of one short side portion 41a1 of the receiving surface portion 41 towards the one long side 41b1, and the vertical plate portion 431 of the second leg portion 43b is positioned offset from the other short side 41a2 of the receiving surface portion 41 towards the other long side 41b2 (see Figure 9). Therefore, although the first leg portion 43a and the second leg portion 43b face each other in the long side direction (Y-axis direction) of the barrier member 40, each vertical plate portion 431 is positioned at an offset position (a position that is shifted from each other) in the short side direction (X-axis direction) of the barrier member 40.

[0035] The vertical plate portion 431 of the first leg portion 43a is provided with a screw hole 433 into which the first fastener B1, described later, is screwed, and the vertical plate portion 431 of the second leg portion 43b is provided with a screw hole 433 into which the second fastener B2, described later, is screwed (only the screw hole 433 on the first leg portion 43a side is shown in Figure 9).

[0036] On the other hand, the horizontal plate portions 432 of the first leg portion 43a and the second leg portion 43b are of the same length and extend in opposite directions. That is, the horizontal plate portion 432 of the first leg portion 43a extends from the tip (lower end) of the vertical plate portion 431 of the first leg portion 43a toward the long side portion 41b2 of the receiving surface portion 41, and the horizontal plate portion 432 of the second leg portion 43b extends from the tip (lower end) of the vertical plate portion 431 of the second leg portion 43b toward the long side portion 41b1 of the receiving surface portion 41. Each horizontal plate portion 432 is provided on the inner surface side of each vertical plate portion 431 so as to face the bottom surface of the receiving surface portion 41 in the vertical direction (Z-axis direction).

[0037] (Support mechanism) The support mechanism 50 supports the barrier member 40 so that it can move within the housing 10. In this embodiment, the support mechanism 50 supports the barrier member 40 so that it can move along the vertical direction (Z-axis direction) (see Figure 7(B)).

[0038] The support mechanism 50 includes a first support member 51a and a second support member 51b. The first support member 51a supports one side of the barrier member 40 (one short side 41a in this embodiment). The second support member 51b supports the other side of the barrier member 40 opposite to the aforementioned side (the other short side 41a in this embodiment). The first support member 51a and the second support member 51b are installed on the bottom surface 15 of the housing 10 so as to face each other across the ventilation opening 151.

[0039] The first support member 51a and the second support member 51b are similarly configured and each has a first fixing portion 511 fixed to the bottom surface portion 15 of the housing 10, a second fixing portion 512 fixed to the bottom surface portion 33 of the housing member 30, and a side portion 513 formed between the first fixing portion 511 and the second fixing portion 512.

[0040] The first fixing portion 511 and the second fixing portion 512 have a planar shape parallel to the XY plane and are fixed to the bottom surface 15 of the housing 10 and the bottom surface 33 of the housing member 30, respectively, by a plurality of screw members. The side portion 513 is formed in a grid shape including a plurality of plate portions extending in the vertical direction (Z axis direction). A guide hole 514 extending in the vertical direction (Z axis direction) is provided in the center of each side portion 513 (only the guide hole 514 on the first support member 51a side is shown in Figure 6). The guide hole 514 is provided in the plate portion located in the center of the plurality of plate portions that form the side portion 513.

[0041] The first support member 51a further has a first fastener B1 that screws into one of the short sides 41a of the barrier member 40. The first fastener B1 is a threaded member and has a shaft portion B1a (see Figure 7(A)) that screws into a threaded hole 433 of the first leg portion 43a of the barrier member 40 via a guide hole 514 formed in the side portion 513 of the first support member 51a. Similarly, the second support member 51b has a second fastener B2 that screws into the other short side 41b of the barrier member 40. The second fastener B2 is a threaded member and has a shaft portion B2a (see Figure 7(A)) that screws into a threaded hole 433 of the second leg portion 43b of the barrier member 40 via a guide hole 514 formed in the side portion 513 of the second support member 51a.

[0042] The shaft portion B1a of the first fastener B1 and the shaft portion B2a of the second fastener B2 are arranged non-coaxially in the long-side direction (Y-axis direction). As described above, the vertical plate portions 431 of the first leg portion 43a and the second leg portion 43b of the barrier member 40 are arranged at offset positions (shifted positions) in the short-side direction (X-axis direction) of the barrier member 40. Therefore, the first fastener B1 and the second fastener B2, which are screwed into the vertical wall portions 431 of the first leg portion 43a and the second leg portion 43b respectively, are offset (shifted) in the short-side direction (X-axis direction) of the barrier member 40 with an interaxial distance of ΔX, as shown in Figure 8. The legs 43a and 43b are formed at positions where the center of ΔX coincides with the center of gravity of the barrier member 40 in the short-side direction (X-axis direction). This allows the barrier member 40 to be stably held in a horizontal position between the two fasteners B1 and B2 without rotating it around the Y-axis. The magnitude of ΔX is not particularly limited as long as the position of the barrier member 40 can be stably maintained.

[0043] As shown by the white arrow A in Figure 7(B), the support mechanism 50 allows the barrier member 40 to move vertically by loosening the fastening of the first fastener B1 and the second fastener B2 to the barrier member 40. At this time, the shaft portion B1a of the first fastener B1 moves along the guide hole 514 of the first support member 51a, and the shaft portion B2a of the second fastener B2 moves along the guide hole 514 of the second support member 51b.

[0044] The barrier member 40 is supported by the support mechanism 50 so as to be movable within the housing 10, with a height from the bottom surface 15 of the housing 10 ranging from a first height H1 to a second height H2. In other words, the height position of the barrier member 40 can be adjusted by an amount equivalent to the difference between these heights ΔH(H2-H1). After adjusting the height position of the barrier member 40, the barrier member 40 is fixed to the adjusted height position by tightening the first fastener B1 and the second fastener B2.

[0045] In this embodiment, the first height H1 is set to the height at which the horizontal plate portions 432 of both legs 43a and 43b of the barrier member 40 contact the filter member 152. As a result, the filter member 152 is held against the bottom surface 152 of the housing 10 by the pressing action from both legs 43a and 43b of the barrier member 40. On the other hand, the second height H2 corresponds to the position at which the barrier member 40 contacts the second fixing portions 512 of the first support member 51a and the second support member 51b.

[0046] Furthermore, since the barrier member 40 can bring both legs 43a and 43b closer to the bottom surface 152 of the housing 10 when the filter member 152 is absent, it may be possible to move the barrier member 40 to a height lower than the first height H1. For example, guide holes 514 may be formed so that the barrier member 40 can descend to a position where both legs 43a and 43b of the barrier member 40 are in contact with the bottom surface 152 of the housing 10.

[0047] [Function of electronic devices] As described above, the electronic device 100 of this embodiment includes a barrier member 40 positioned opposite the bottom surface 33 of the housing member 30 that houses the circuit unit 20. Therefore, even if the circuit unit 20 catches fire due to, for example, electrical leakage, short circuit, surge, or deterioration of electronic components, the barrier member 40 can prevent the fire from spreading to the surrounding housing member 30. In particular, in this embodiment, since the barrier member 40 is positioned below the housing member 30, objects falling from the circuit unit 20 or sparks from the circuit unit 20 can be appropriately received by the receiving surface 41 of the barrier member 40. This prevents objects falling or sparks from the circuit unit 20 from coming into contact with the filter member 152 positioned below the barrier member 40, the structures outside the ventilation opening 151 below it, and even the wiring cables 22.

[0048] Furthermore, according to this embodiment, since the housing 10 is equipped with a support mechanism 50 that movably supports the barrier member 40 inside the housing 10, the barrier member 40 can be adjusted to any height position depending on whether the electronic device 100 is in use or not.

[0049] In other words, when the electronic device 100 is in use, the barrier member 40 is supported by the support mechanism 50 at a first height H1 position shown by a solid line in Figure 7(B). In this state, the filter member 152 is sandwiched between the two legs 43a, 43b of the barrier member 40 and the bottom surface 15 of the housing 10.

[0050] On the other hand, during maintenance of the electronic device 100, for example, the barrier member 40 is supported by the support mechanism 50 at a second height H2 position shown by the dashed line in Figure 7(B). Maintenance work on the electronic device 100 is performed with the front section 11, rear section 12, and right side section 13 removed, for example, as shown in Figure 2.

[0051] When the barrier member 40 is supported at the second height H2, the receiving surface 41 is at a higher position than when the electronic device 100 is in use, thus increasing the space between the receiving surface 41 and the bottom surface 15 of the housing 10. This makes it easier to route the wiring cables 22 and improves maintenance workability. It also makes it easier to replace the filter member 152 and clean the ventilation openings 151. Furthermore, it can flexibly accommodate increases in the number of wiring cables 22 due to the addition of printed circuit boards 21 due to specification changes, etc., and changes in the routing layout of the wiring cables 22.

[0052] Furthermore, according to this embodiment, since the barrier member 40 has first legs 43a and second legs 43b that contact the filter member 152 at a first height position H1, the filter member 152 can be stably held in a position that covers the ventilation opening 151 without requiring a separate fixing means to fix the filter member 152 to the bottom surface 152 of the housing 10.

[0053] Furthermore, according to this embodiment, since the support mechanism 50 has a first support member 51a and a second support member 51b that support two opposing sides of the barrier member 40, the barrier member 40 can be supported in an adjustable height position with a simple configuration. In particular, the height position of the barrier member 40 can be set variably simply by adjusting the tightening amount of the first fastener B1 and the second fastener B2, so the position of the barrier member 40 can be easily changed. Moreover, since the shaft portions B1 and B2a of the first fastener B1 and the second fastener B2 are arranged non-coaxially in the direction of the long side (Y-axis direction), the barrier member 40 can be held in a stable position with only the two fasteners B1 and B2 without tilting it around an axis (Y-axis) parallel to its long side.

[0054] <Second Embodiment> Figure 10 is a front view of the main interior of the housing 10 in an electronic device 200 according to a second embodiment of the present invention, showing a barrier member 240 and a support mechanism 250 that supports it.Hereafter, configurations different from the first embodiment will be mainly described, and the same reference numerals will be used for components similar to those in the first embodiment, and their descriptions will be omitted or simplified.

[0055] The barrier member 240 differs from the barrier member 40 of the first embodiment in that, among the wall portions 42 provided on both short sides 41a1 and 41a2, a protruding piece 44 is formed on one of the wall portions 42 located on the long side 41b1 side, projecting upward. The protruding pieces 44 on each short side 41a1 and 41a2 face each other in the long side direction (Y-axis direction) of the barrier member 240 and have through holes through which the axial member B3a, described later, passes.

[0056] The support mechanism 250 includes a first support member 251a and a second support member 251b. The first support member 251a and the second support member 251b are installed on the bottom surface 15 of the housing 10, facing each other in the Y-axis direction with the barrier member 240 in between. A guide hole 514a is formed in the side surface 513 of the first support member 251a, through which the shaft portion B1a of the first fastener B1, which is screwed onto the first leg portion 43a of the barrier member 240, passes. A guide hole 514b is formed in the side surface 513 of the second support member 251b, through which the shaft portion B2a of the second fastener B2, which is screwed onto the second leg portion 43b of the barrier member 240, passes. The first fastener B1 and the second fastener B2 are positioned offset from each other in the X-axis direction (at positions that are staggered from each other), similar to the first embodiment. Therefore, the guide holes 514a and 514b formed on both side surfaces 513 of the first support member 251a and the second support member 251b are also positioned offset from each other in the X-axis direction (at positions that are staggered from each other) (see Figure 10).

[0057] The first support member 251a and the second support member 251b further have guide holes 514c through which an axis member B3a extending in the Y-axis direction passes. The axis member B3a passes through the protruding pieces 44 formed on each of the short sides 41a1 and 41a2 of the barrier member 240. Both ends of the axis member B3a are supported by the guide holes 514c formed in the side surface 513 of the first support member 251a and the guide holes 514c formed in the side surface 513 of the second support member 251b, respectively. The guide holes 514c face each other in the Y-axis direction and are formed to have the same shape when viewed from the Y-axis direction.

[0058] Figure 11 is a front view of the support mechanism 250 as seen from the Y-axis direction. The guide hole 514a formed in the first support member 251a has a first hole portion 71a, a second hole portion 72a, and a third hole portion 73a, and the shaft portion B1a of the first fastener B1 is formed to be movable along the first hole portion 71a, the second hole portion 72a, and the third hole portion 73c. ​​The first hole portion 71a extends in the vertical direction (Z-axis direction), the second hole portion 72a extends from the upper end of the first hole portion 71a to the left side in the figure (towards the left side portion 14 of the housing 10) in the width direction (X-axis direction), and the third hole portion 73a is inclined diagonally from the tip of the second hole portion 72a towards the lower left in the figure.

[0059] The guide hole 514b formed in the second support member 251b has a first hole 71b, a second hole 72b, and a third hole 73b, and the shaft portion B2a of the second fastener B2 is formed to be movable along the first hole 71b, the second hole 72b, and the third hole 73b. The first hole 71b extends in the vertical direction (Z-axis direction), the second hole 72b extends from the upper end of the first hole 71b to the left side in the figure (towards the left side surface portion 14 of the housing 10) in the width direction (X-axis direction), and the third hole 73b is inclined diagonally from the tip of the second hole 72b towards the lower left in the figure. The third hole 73b is longer than the third hole 73a of the guide hole 514a and is formed with a slightly smaller angle of inclination with respect to the vertical direction. In other words, these third holes 73a and 73b are formed with a length and angle such that the barrier member 240 can be tilted at a predetermined angle around the shaft member B3a at a predetermined position (see Figure 14).

[0060] The guide holes 514c formed in both the first support member 251a and the second support member 251b have a first hole portion 71c and a second hole portion 72c, and the shaft member B3a is formed to be movable along the first hole portion 71c and the second hole portion 72c. The first hole portion 71c extends in the vertical direction (Z-axis direction), and the second hole portion 72c extends from the upper end of the first hole portion 71c to the left side in the figure (towards the left side surface portion 14 of the housing 10) in the width direction (X-axis direction).

[0061] In the electronic device 200 of this embodiment, the support mechanism 250 supports the barrier member 240 so that it can move in the vertical direction (Z-axis direction, first axis direction) and width direction (X-axis direction, third axis direction) of the housing 10, and move (rotate) around an axis parallel to its depth direction (Y-axis direction, second axis direction). The barrier member 240 can move along guide holes 514a, 514b, and 514c by loosening the tightening of the first fastener B1 and the second fastener B2. After adjusting the height position of the barrier member 240, the barrier member 240 is fixed at the adjusted height position by tightening the first fastener B1 and the second fastener B2.

[0062] Figure 10 shows the barrier member 240 fixed in its lowest position (corresponding to the first height H1 position described above). At this time, the shaft portion B1a of the first fastener B1 is located at the lower end of the first hole 71a of the guide hole 514a, the shaft portion B2a of the second fastener B2 is located at the lower end of the first hole 71b of the guide hole 514b, and the shaft member B3a is located at the lower end of the first hole 71c of the guide hole 514c. When the electronic device 200 is in use, the barrier member 240 is fixed in this position. At this time, the filter member (not shown) placed on the bottom surface 15 of the housing 10 is held by the two legs 43a and 43b of the barrier member 240.

[0063] Figure 12 shows the barrier member 240 fixed in the uppermost position (corresponding to the second height H2 position described above). At this time, the shaft portion B1a of the first fastener B1 is located at the upper end of the first hole 71a of the guide hole 514a, the shaft portion B2a of the second fastener B2 is located at the upper end of the first hole 71b of the guide hole 514b, and the shaft member B3a is located at the upper end of the first hole 71c of the guide hole 514c.

[0064] Figure 13 shows the state when the barrier member 240 is moved from the position shown in Figure 12 along the X-axis to the left side portion 14 of the housing 10. At this time, the shaft portion B1a of the first fastener B1 is located at the left end of the second hole portion 72a of the guide hole 514a in the figure, the shaft portion B2a of the second fastener B2 is located at the left end of the second hole portion 72b of the guide hole 514b in the figure, and the shaft member B3a is located at the left end of the second hole portion 72c of the guide hole 514c in the figure.

[0065] As shown in Figures 12 and 13, the barrier member 240 can move in the width direction (X-axis direction) of the housing 10 at a second height H2 position. Therefore, when performing maintenance on the electronic equipment 200 or when changing specifications, the barrier member 240 can be moved to the left side portion 14 of the housing 10 to secure working space directly above the wiring cable 22, thereby improving the ease of routing the wiring. Depending on the nature of the specification change, the legs 43a and 43b of the barrier member may not be able to perform the function of holding the filter member 152, but in this case, a separate member for holding the filter member 152 can be provided.

[0066] Figure 14 further shows the state when the barrier member 240 is tilted clockwise around the shaft member B3a from the position shown in Figure 13. At this time, the shaft portion B1a of the first fastener B1 is located at the lower end of the third hole 73a of the guide hole 514a in the same figure, the shaft portion B2a of the second fastener B2 is located at the left end of the third hole 73b of the guide hole 514b in the same figure, and the shaft member B3a is located at the left end of the second hole 72c of the guide hole 514c in the same figure. The maximum tilt angle of the barrier member 240 with respect to the horizontal direction is not particularly limited, and is, for example, 10° to 20°.

[0067] As shown in Figure 14, the barrier member 240 can be moved in a direction that is inclined around its long side direction (Y-axis direction), so that foreign matter accumulated on the receiving surface portion 41 of the barrier member 240 can be easily removed. This improves the maintainability of the electronic device 200.

[0068] Although embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the embodiments described above and can be modified in various ways.

[0069] For example, in the embodiments described above, the electronic devices 100 and 200 were described as controllers connected to an operation panel installed in a fire control room, but of course the present invention is not limited to this and can be applied to electronic devices in general that have a fire spread prevention structure.

[0070] Furthermore, in the above embodiment, the barrier members 40 and 240 are positioned below the housing member 30, but are not limited to this, and may be positioned to the side of the housing member 30 or elsewhere. Also, although the barrier members 40 and 240 are formed in a rectangular plate shape, are not limited to this, and may be formed in any shape, such as a circle or trapezoid, depending on the placement location. For example, if there are substrates among the multiple printed circuit boards 21 arranged in the housing member 30 that do not need to be covered by the barrier member, the barrier member may be formed in a shape that has a notch or opening to expose the substrate to the outside.

[0071] In the above embodiment, the ventilation opening 151 is provided on the bottom surface 15 of the housing 10, but it is not limited to this, and may also be provided on the front surface 11, rear surface 12, right side surface 13, left side surface 14, or top surface 16 of the housing 10. Similarly, the blower fan 161 may be provided on a surface of the housing 10 other than the top surface 16.

[0072] Furthermore, in the above embodiments, the barrier members 40 and 240 were supported or fixed by two fasteners B1 and B2 in the support mechanisms 50 and 250, but three or more fasteners may be used. Also, although screw members were used as the first fastener B1 and second fastener B2 for supporting and fixing the barrier members 20 and 240, the invention is not limited to this, and other fasteners such as clip members or magnets may be used. [Explanation of symbols]

[0073] 10…Cabinet 20...Circuit Unit 22…Wiring cables 30…Storage component 40,240… Barrier components 41... Receiving surface 43a, 43b…legs 50...Support mechanism 51…First support member 52...Second support member 514,514a,514b,514c...Guide hole 100,200…Electronic equipment 152…Filter component B1…1st fastener B2…Second fastener B3a…Shaft member

Claims

1. The casing and A circuit unit equipped with electronic components, A housing member arranged in the housing and housing the circuit unit, A fire-spread prevention barrier member is positioned opposite a part of the aforementioned containment member, A support mechanism that supports the barrier member so that it can move inside the housing and Equipped with, The barrier member is positioned below the housing member and has a receiving surface that receives objects falling from the circuit unit. electronic equipment.

2. The electronic device according to claim 1, The housing has a bottom portion provided with a ventilation opening facing the barrier member, The barrier member is positioned between the housing member and the ventilation opening. electronic equipment.

3. The electronic device according to claim 2, The support mechanism supports the barrier member so that it can move within a range where the height from the bottom surface is between a first height and a second height. electronic equipment.

4. The electronic device according to claim 3, The bottom portion has a filter member that covers the ventilation opening. The barrier member has legs that contact the filter member at the first height position. electronic equipment.

5. An electronic device according to any one of claims 2 to 4, The aforementioned support mechanism is A first support member is installed on the bottom surface of the housing and supports one side of the barrier member, The housing has a second support member installed on the bottom surface and supporting the other side of the barrier member opposite to the side of the barrier member. electronic equipment.

6. The electronic device according to claim 5, The first support member includes a first fastener that is screwed into the side of the one side, The second support member includes a second fastener that is screwed into the other side and is positioned non-coaxially with the first fastener. electronic equipment.

7. The electronic device according to claim 6, When the vertical direction is defined as the first axial direction, the direction in which the first support member and the second support member face each other is defined as the second axial direction, and the direction perpendicular to the first axial direction and the second axial direction is defined as the third axial direction, the support mechanism supports the barrier member so that it can move in the first axial direction, the third axial direction, or around the second axis. electronic equipment.

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