Electronic equipment unit and cover

Abstract

The present invention provides an electronic device unit in which the cover portion can be removed from the casing. [Solution] An electronic device unit that can mount electronic devices and be housed inside a housing comprises a chassis portion having a mounting surface on which electronic devices are mounted, and a box-shaped cover portion that is detachable from the chassis portion and has a top portion and side portions that cover the mounting surface. The front portion of the side portion, which becomes the front when the cover portion is housed in the housing, is rotatable relative to the top portion. The side portion of the cover portion is provided with a locking member having a locking portion that prevents the front portion from rotating relative to the top portion. The locking member has a release portion that releases the prevention of rotation of the front portion by the locking portion which is pressed from the front portion side.

Description

[Technical Field]

[0001] The present invention relates to an electronic device unit that can be stored inside a casing installed outdoors and that is mounted with an electronic device, and further relates to a structure of a cover detachable from the unit. [Background Art]

[0002] As a conventional cover structure for an electronic device unit, a screw is removed using a tool or the like, and all operations for removing the cover are performed manually. (See Patent Document 1). [Prior Art Document] [Patent Document]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2004-265999 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] Generally, an electronic device unit housed in a casing installed outdoors is not provided with a cover, and when a circuit board mounted on the electronic device unit fails, the electronic device unit is replaced outdoors at the installation location. There is a problem in that the circuit board is affected by rain, wind and snow during the unit replacement work, which causes a failure. In addition, when the electronic device unit is provided with a fan for cooling the circuit board, covering the unit with a cover hinders heat dissipation, increases the temperature of the circuit board and causes thermal runaway, so a cover cannot be added. Even if a cover is attached to the electronic device unit, since it is necessary to remove the screw using a tool or the like near the casing installed outdoors and then set it in the casing, the circuit board is affected by rain, wind and snow during the work, which is problematic.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide an electronic device unit and a cover that include a cover portion and allow the cover portion to be removed inside the casing. [Means for solving the problem]

[0006] The electronic device unit according to the present invention is an electronic device unit that can mount electronic devices and be housed inside a housing, comprising: a chassis portion having a mounting surface on which the electronic devices are mounted; and a box-shaped cover portion having a top portion and side portions that cover the mounting surface and which is detachable from the chassis portion, wherein the front portion of the side portions that become the front when the cover portion is housed in the housing is rotatable with respect to the top portion, the side portion of the cover portion is provided with a locking member having a locking portion that prevents the front portion from rotating with respect to the top portion, and the locking member has a release portion that, when pressed from the front portion side, releases the prevention of rotation of the front portion by the locking portion.

[0007] The cover according to the present invention is a cover that covers the mounting surface of an electronic device unit having a mounting surface for mounting electronic devices and being housed inside a housing, and comprises a top surface that covers the mounting surface, a front surface that becomes the front when the electronic device unit is housed in the housing and is rotatably attached to the top surface, and a side surface provided with a locking member having a locking portion that prevents the front surface from rotating relative to the top surface, wherein the locking member has a release portion that releases the prevention of rotation of the front surface by the locking portion when pressed from the front surface side. [Effects of the Invention]

[0008] According to the present invention, an electronic device unit and cover are obtained that include a cover portion that is detachable from the chassis portion, and the cover portion can be removed from inside the housing. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic perspective view showing the external appearance of an electronic device housing according to an embodiment of the present invention. [Figure 2] This is a schematic perspective view showing the chassis portion of the electronic equipment unit of the first embodiment. [Figure 3] This is a perspective view showing the cover portion of the electronic device unit of the first embodiment. [Figure 4] This is a right-side view showing the cover portion of the electronic device unit of the first embodiment. [Figure 5] This is a perspective view showing the electronic equipment unit of the first embodiment from a front-on perspective. [Figure 6] This is a perspective view showing the electronic equipment unit of the first embodiment viewed from the front. [Figure 7] This is a schematic front cross-sectional view showing a portion of the upper part of the interior of the housing of the first embodiment. [Figure 8] This is a schematic partial perspective view showing the electronic equipment unit of the first embodiment just before it is placed inside the housing, and a portion of the upper part of the housing. [Figure 9] This is a partial top view showing a portion of the electronic equipment unit of the first embodiment. [Figure 10] This is a view showing the cross-section of the YY line in Figure 9. [Figure 11] This is an explanatory diagram illustrating how the electronic equipment unit of the first embodiment is stored in the housing from the front to the back. [Figure 12] This is an explanatory diagram illustrating the operation of attaching the cover portion to the chassis portion of the electronic device unit of the first embodiment. [Figure 13] This is an explanatory diagram illustrating the operation of attaching the cover portion to the chassis portion of the electronic device unit of the first embodiment. [Figure 14] This is an explanatory diagram illustrating the operation of attaching the cover portion to the chassis portion of the electronic device unit of the first embodiment. [Figure 15] This is an explanatory diagram illustrating the operation of attaching the cover portion to the chassis portion of the electronic device unit of the first embodiment. [Figure 16] This is a schematic perspective view showing the chassis portion of the electronic equipment unit of the second embodiment. [Figure 17] This is a perspective view showing the cover portion of the electronic device unit of the second embodiment. [Figure 18]It is a right side view showing the cover part of the electronic device unit according to the second embodiment. [Figure 19] It is a perspective view showing a bottom-up view from the front of the electronic device unit according to the second embodiment. [Figure 20] It is a bottom view showing the cover part of the electronic device unit according to the second embodiment. [Figure 21] It is an explanatory diagram illustrating a state where the housing is stored from the front side to the back side in the electronic device unit according to the second embodiment. [Figure 22] It is an explanatory diagram illustrating an operation of attaching the cover part to the chassis part in the electronic device unit according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, housings according to embodiments and examples of the present invention will be described in detail with reference to the drawings. In the embodiments and examples, components having substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is omitted.

[0011] Figure 1 is a schematic perspective view showing a housing 1 for accommodating an electronic device unit according to an embodiment of the present invention. The housing 1 is formed by a right side wall 2 and a left side wall 3 that stand and face parallel to each other, an upper side wall 4 and a lower side wall 5 that face parallel to each other, and a back surface part 7 fixed to these walls, has a front opening KK with an open front face, and is a substantially rectangular parallelepiped, for example metal box body, in which a maintenance door 6 is provided on the right side wall 2 so as to be openable and closable at the front opening KK. For convenience of description, as shown in the drawing, the direction of each axis of the orthogonal XYZ coordinate axes is defined as the XYZ directions, the direction from the front opening KK toward the back surface part 7 of the housing 1 is defined as the Z direction (that is, the front side and the back side), and the description is given with left-right (the horizontal direction in the X direction) and up-down (the vertical direction in the Y direction) as viewed from the front opening KK. Figure 1 shows a schematic structure of the housing 1 installed outdoors.

[0012] The housing 1 accommodates one or more electronic device units 8 substantially horizontally inside thereof. Although five electronic device units 8 are shown in Figure 1, the number of these units can be set as appropriate.

[0013] On the inner walls of the left side wall 3 and the right side wall 2 of the housing 1, parallel and opposing retaining rails 26 are formed, respectively, to horizontally hold the electronic equipment unit 8. The retaining rails 26 support the lower edges of the electronic equipment unit 8. The retaining rails 26 hold the opposing left and right lower edges of each electronic equipment unit 8 so that the electronic equipment unit 8 can move in the Z direction from the front opening KK. The retaining rails 26 may be formed, for example, on the left side wall 3 and the right side wall 2 by stamping sheet metal.

[0014] Frames FB are provided on the inner walls of the left side wall 3 and the right side wall 2 near the front opening KK of the housing 1, respectively, and are erected inward so as to extend vertically.

[0015] Each of the electronic equipment units 8 is moved (slid) in the depth direction (Z direction) from the front opening KK, and the left and right flanges FLG of the electronic equipment unit 8 are brought into contact with the frame FB of the left side wall 3 and the right side wall 2, and fixed with screws SW, and are erected and housed by the holding rail section 26 and the frame FB as shown in Figure 1.

[0016] By opening the door 6 of the enclosure 1, it becomes possible to inspect the various electronic equipment units 8, which house control units, communication units, and other components in a multi-tiered arrangement within the enclosure 1. If any circuit board (not shown) mounted on an electronic equipment unit 8 malfunctions due to some influence, the electronic equipment unit with the malfunctioning circuit board is replaced outdoors at the installation site.

[0017] (First example) Figure 2 is a schematic perspective view showing the open-topped box-shaped chassis portion 23 of the electronic equipment unit 8 (see Figure 1) in this embodiment.

[0018] The chassis section 23 has a metal plate mounting surface MF on which three types of electronic devices, 10, 11, and 12, connected by cables (not shown), are fixed and mounted, and a fan 13 for cooling the circuit board 10 is attached.

[0019] The chassis portion 23 has a pair of nearly symmetrical side plate portions 23W formed by bending (sheet metal processing) perpendicularly upward with respect to the mounting surface MF, sandwiching the mounting surface MF in the center. Each of the side plate portions 23W has a flange FLG integrally bent 90° outwards to the left and right. The flange FLG is the part for fixing the chassis portion 23 of the electronic equipment unit 8 to the frame FB inside the housing 1. On the mounting surface MF near the inside of the pair of side plate portions 23W, engagement holes 24 are provided at left and right positions that do not interfere with the mounted electronic equipment, and these are engaged portions that engage with the auxiliary locking portion 18 of the locking member RK of the cover portion 14.

[0020] The chassis section 23 has a reinforcing section BS bent at a 90° angle vertically on the rear side of the mounting surface MF, and a reinforcing section FS bent at a 90° angle vertically on the front side of the mounting surface MF. The reinforcing section FS on the front side of the chassis section 23 is provided with a butt surface 25 that contacts the front rear surface 15F of the cover section 14, and its upper tip has a tapered shape (alignment means) that narrows.

[0021] Figure 3 is a perspective view showing the structure of the cover portion 14 in this embodiment. Figure 4 is a right-side view showing the structure of the cover portion 14 in this embodiment.

[0022] The main cover 15 of the cover section 14 is formed by bending the left side section 15L, the right side section 15R, the upper side section 15T (top section), and the front rear section 15F, and then fixing them together by means of welding or other means. In the main cover 15, the lower parts of the left side section 15L and the right side section 15R, which are further bent outwards by 90°, are used as contact surfaces CF with the chassis section 23 and also function as reinforcing parts that improve the strength of the main cover 15.

[0023] The cover portion 14 has a rear sub-cover 21 (front portion which is the front of the housing 1) which is rotatably (opens and closes) attached to the main cover 15 by a hinge 22 at the rear edge of the upper side portion 15T (top portion) of the main cover 15. The cover portion 14 is a box-shaped member having an upper side portion 15T (top portion) and side portions 15L, 15R, and 15F that cover the mounting surface MF of the chassis portion 23.

[0024] A lock lever bracket 16 is firmly fixed to the left side portion 15L and the right side portion 15R of the main cover 15 with screws SW, sandwiching a spacer 17 that extends in the left-right direction. A lock member RK is provided that can rotate around the spacer 17 as the axis of rotation. When the cover portion 14 and the chassis portion 23 are integrated, the lock member RK is formed in a roughly T-shape, with a release portion RR extending upward from the spacer 17, an auxiliary lock portion 18 extending downward, and a main lock portion 19 extending inward. A torsion spring 20 is located inside the lock member RK, which rotates the lock member RK together with the spacer 17, that is, by applying force in the clockwise direction as shown by the black arrow in Figure 4. When force is applied to the release portion RR in a counterclockwise direction, the lock member RK is configured to stop when its release portion RR comes into contact with the stopper portion 16-1 of the lock lever bracket 16. By pressing the release portion RR of the locking member RK from the sub-cover 21 side, the locking member RK rotates counterclockwise around the spacer 17 against the torsion spring 20.

[0025] Hook portions 18FK and 19FK are provided at the ends of the auxiliary lock portion 18 and the main lock portion 19, respectively. The hook portion 18FK of the auxiliary lock portion 18 is configured to pass through the passage opening CFH of the contact surface CF provided at the bottom of the left side portion 15L and the right side portion 15R of the main cover 15.

[0026] The sub-cover 21 of the cover section 14 has a structure that allows it to rotate when attached to the main cover 15 by a hinge 22, and its left and right sub-cover extensions 21PT are provided so that they can be locked by the hook portion 19FK of the main lock section 19. The lower part on the side opposite the hinge 22 is bent 180° and flattened at the end to ensure the safety of the operator and the strength of the sub-cover 21. The cover section 14 can be attached to and detached from the chassis section 23 by releasing and locking with the locking member RK.

[0027] Figure 5 is a perspective view showing an overhead view of the electronic equipment unit 8 of this embodiment from the front. Figure 6 is a perspective view showing an upward view of the electronic equipment unit 8 of this embodiment from the front.

[0028] The electronic equipment unit 8 consists of a lower chassis section 23 and an upper cover section 14. The cover section 14 is a box-shaped member that can be engaged with the chassis section 23 by a locking member RK and is movable and detachable in the forward direction. The electronic equipment unit 8, consisting of the chassis section 23 and the cover section 14, has a structure that is easy to assemble thanks to the locking member RK. As shown in Figure 6, the cover section 14 is locked to the chassis section 23 via an auxiliary locking part 18 of the locking member RK.

[0029] Thus, the locking member RK has an auxiliary locking part 18 that prevents the movement of the chassis part 23 as a fixing means for fixing the cover part 14 to the chassis part 23, and the chassis part 23 has an engagement hole 24 that engages with the auxiliary locking part 18, so the movement of the chassis part 23 can be prevented and released by the engagement and disengagement of the auxiliary locking part 18 and the engagement hole 24 in accordance with the movement of the release part RR of the locking member RK. This release makes it possible to pull the cover part 14 forward by hand.

[0030] Figure 7 is a schematic front cross-sectional view showing a portion of the upper part of the interior of the enclosure 1, which is installed outdoors. Figure 8 is a schematic partial perspective view showing a portion of the upper part of the enclosure 1, just before the electronic equipment unit 8 of this embodiment is placed inside the enclosure 1.

[0031] As shown in Figure 7, a pair of parallel retaining rails 26 and posts 27 are provided on the left and right inner surfaces of the housing 1, respectively, to support the underside of the chassis portion 23 of one electronic device unit 8. When storing, the operator places the electronic device unit 8 on the retaining rails 26 and slides it in the direction of the arrow (towards the back) as shown in Figure 8 to set the electronic device unit 8. Furthermore, as shown in Figure 7, the posts 27 that come into contact with the release portion RR of the locking member RK (see Figures 3 to 5) are positioned so as not to interfere with the left and right side plates 23W of the chassis portion 23. The electronic device unit 8 comes into contact with a part of the housing 1 (post 27), thereby pressing the release portion RR of the locking member RK.

[0032] (Operation description) Figure 9 is a partial top view showing a part of the electronic equipment unit 8 of this embodiment. Figure 10 is a view along the YY line in Figure 9. Figure 11 is an explanatory diagram illustrating how the new electronic equipment unit 8 is stored in the housing 1 from the front to the back after opening the door 6 of the housing 1 and removing the chassis of the old electronic equipment unit. In Figure 11, the retaining rail is not shown, but the positions of the frame FB (for mounting the flange FLG of the chassis part) of the housing 1, the position of the post 27 (for releasing the locking member RK), and the position of the rear part 7 are indicated by dashed lines.

[0033] First, open the door 6 of enclosure 1 and remove the old electronic equipment unit, then slide the new electronic equipment unit 8 into enclosure 1 from the front to the back (see Figure 11, 10-1).

[0034] As the electronic equipment unit 8 slides, the release portion RR of the locking member RK comes into contact with the post 27 mounted inside the housing 1, causing the release portion RR to be pressed from the sub-cover 21 side. This causes the locking member RK to rotate counterclockwise around the spacer 17 as its axis, initially releasing the lock between the sub-cover 21 and the main locking portion 19 (see Figure 11, 10-2).

[0035] By sliding the electronic equipment unit 8 further inward, the auxiliary locking portion 18 of the locking member RK rotates, releasing the lock between the auxiliary locking portion 18 and the chassis portion 23, and then contacting the lock lever bracket 16 (see 10-3 in Figure 11).

[0036] As the electronic equipment unit 8 is slid further, the release portion RR of the locking member RK of the cover portion 14 is in contact with the post 27, preventing the cover portion 14 from moving inward and keeping it in this position. The sub-cover 21 rotates on the hinge 22 (see 10-4 in Figure 11) and opens while in contact with the left and right side plates 23W of the chassis portion 23. Then, as the worker begins to pull the cover portion 14 towards them, the auxiliary locking portion 18 of the locking member RK disengages from the engagement hole 24 of the mounting surface MF of the chassis portion 23, and the cover portion 14 moves towards them.

[0037] After sliding the cover 14 to a mounting position where it cannot be slid further in, the worker pulls the cover 14 towards the front, thereby detaching it from the chassis 23 (see Figure 11, 10-5).

[0038] Next, using cross-sectional views similar to those in Figure 10 (Figures 12, 14, and 15), the operation of attaching the cover portion 14 to the chassis portion 23 to form the electronic equipment unit 8 will be explained. Figure 12 is an explanatory diagram illustrating how the cover portion 14 is attached to the chassis portion 23.

[0039] As shown in Figure 12, first, the locking between the sub-cover 21 and the main locking part 19 is released on the cover part 14. The sub-cover 21 may be in contact with the main locking part 19 or fully open. Then, the main cover 15 is set so that it fits inside the pair of side plates 23W on both sides of the chassis part 23 in the direction of the arrow in Figure 12 (see Figure 13), and the main cover 15 is lowered while pressing it against the abutment surface 25 at the front of the chassis. Because the base of the abutment surface 25 is spread out to the left and right, the inner surfaces of the left side part 15L and the right side part 15R of the main cover 15 are guided, determining the position in the left-right direction. When the cover part 14 is lowered completely, the auxiliary locking part 18 and the chassis part 23 are locked together, and the vertical direction is fixed.

[0040] Then, with the cover still pressed against the abutment surface 25 at the front of the chassis (see Figure 14), the sub-cover 21 is rotated and locked into the main locking part 19, fixing the front-to-back direction and completing the installation of the cover part 14 (see Figure 15).

[0041] (Explanation of effects) As described above, according to the first embodiment, a detachable cover 14 is added to the electronic equipment unit (chassis part) in its standalone state. Because the cover 14 is removed inside the housing 1, rain, wind, and snow can be prevented from affecting the circuit board during replacement work. After the electronic equipment unit is replaced, the cover 14 is removed, so it does not obstruct heat dissipation by the fan. Since no fastening parts such as screws are used to fix the cover 14, there is no risk of screws being lost or falling off, no tools are required, and the cover 14 can be removed at the same time as the installation of the electronic equipment unit, resulting in good workability. Because a cover 14 is added to the electronic equipment unit, the circuit board on the chassis part can be protected even during transportation, and the cover 14 can also be attached to the old unit after replacement. The cover 14 can be used many times, and only a small number needs to be prepared, making it economical. Since the cover 14 is a maintenance part, it does not increase the cost of the product.

[0042] (Second example) This embodiment is substantially the same as the first embodiment, except that, instead of the fixing means consisting of the auxiliary locking portion 18 of the locking member RK of the cover portion 14 and the engagement hole 24 of the chassis portion 23 that engages with it in the first embodiment, it uses a fixing means consisting of a hook portion TL at the lower end of the front rear portion 15F of the cover portion 14 and a hook portion OL at the lower end of the sub-cover 21. The cover portion 14 of this embodiment includes a hook portion TL that is bent 90° at the lower end of the front rear portion 15F of the main cover 15 so as to extend in the depth direction, and a hook portion OL that is bent 90° at the lower end of the sub-cover 21 so as to extend in the front direction. The hook portions OL and TL function as fixing means that fix the cover portion 14 to the chassis portion 23, which engages with the chassis portion 23 and prevents the movement of the chassis portion 23. In this way, the hook-shaped engaging portion (hook portion OL and hook portion TL) releases the restriction on the movement of the chassis portion 23 by engaging with the engaging portion (hook portion OL) of the sub-cover 21 in accordance with the movement of the release portion RR of the locking member RK.

[0043] Figure 16 is a schematic perspective view showing the open-topped box-shaped chassis portion 23 of the electronic equipment unit 8 (see Figure 1) in this embodiment. The chassis portion 23 in this embodiment is substantially the same as that of the first embodiment, except that the engagement holes 24 and abutment surface 25 of the first embodiment are not provided.

[0044] Figure 17 is a perspective view showing the structure of the cover portion 14 of this embodiment. Figure 18 is a right-side view showing the structure of the cover portion 14 of this embodiment. The cover portion 14 of this embodiment is substantially the same as that of the first embodiment, except that the locking member RK is formed in an L-shape instead of a T-shape, the auxiliary locking portion 18 extending downward from the spacer 17 is not formed, a hook portion TL is formed at the lower end of the front rear portion 15F of the cover portion 14 and a hook portion OL is formed at the lower end of the sub-cover 21, and a tapered chassis portion CFT, which is bent at 90°, is provided on the outer side of the lower edges of the left and right side portions 15L and 15R of the main cover 15.

[0045] Figure 19 is a perspective view showing the electronic equipment unit 8 of this embodiment viewed from the front. The electronic equipment unit 8 consists of a lower chassis portion 23 and an upper cover portion 14. As shown in Figure 19, a hook portion TL is provided at the lower end of the front rear portion 15F of the cover portion 14 and a hook portion OL is provided at the lower end of the sub-cover 21. The cover portion 14 and the chassis portion 23 are fixed together by the locking of the cover portion 14 by the main lock portion 19 of the locking member RK. Thus, in the second embodiment, the cover portion 14 locks the chassis portion 23 with the lower hook portion TL of the front rear portion 15F of the main cover 15 and the lower hook portion OL of the sub-cover 21.

[0046] Figure 20 is a bottom view showing the cover portion 14 of the electronic equipment unit of the second embodiment. As shown in Figure 20, the contact surface CFT between the chassis portion 23, which has a 90° bend on the outer lower edge of the left side portion 15L and the right side portion 15R of the main cover 15, is formed so that the bent portion at the back is narrower and the bent portion at the front is wider, functioning as a tapered alignment means, and the portion closer to the front is provided with a shape that is vertical in the illustration. The internal structure of the housing 1 is the same as in the first embodiment.

[0047] (Operation description) The attachment and detachment operation of the cover portion 14 in the second embodiment will now be described. Figure 21 is an explanatory diagram that uses a cross-sectional view similar to that of Figure 11 to show how the door 6 of the housing 1 is opened, the chassis portion of the old electronic equipment unit is removed, and then the new electronic equipment unit 8 is stored in the housing 1 from the front to the back. In Figure 21, the retaining rail portion is not shown, but the position of the frame FB of the housing 1 (for attaching the flange FLG of the chassis portion), the position of the post 27 (for releasing the locking member RK), and the position of the rear portion 7 are indicated by dashed lines.

[0048] First, open the door 6 of enclosure 1 and remove the old electronic equipment unit, then slide the new electronic equipment unit 8 into enclosure 1 from the front to the back (see Figure 21, 10-1).

[0049] As the electronic equipment unit 8 slides, the release portion RR of the locking member RK comes into contact with the post 27 mounted inside the housing 1, causing the release portion RR to be pressed from the sub-cover 21 side. This causes the locking member RK to rotate counterclockwise around the spacer 17 as its axis, releasing the lock between the sub-cover 21 and the main locking portion 19, and then coming into contact with the locking lever bracket 16 (see Figure 21, 10-2).

[0050] When the electronic equipment unit 8 is slid further inward, the release part RR of the locking member RK of the cover part 14 is in contact with the post 27, so the cover part 14 cannot move further inward and remains in this position, while the sub-cover 21 rotates (see 10-3 in Figure 21) and opens by the hinge 22 while in contact with the left and right side plates 23W of the chassis part 23.

[0051] After sliding the cover 14 to a mounting position where it cannot be slid further in, the worker pulls the cover 14 towards the front, thereby detaching it from the chassis 23 (see Figure 21, 10-4).

[0052] Next, the operation of attaching the cover portion 14 to the chassis portion will be explained using Figure 22.

[0053] First, release the locking mechanism between the sub-cover 21 and the main locking mechanism 19. The sub-cover 21 can be held in place by hand so as not to touch the chassis, or it can be fully opened (see 10-1 in Figure 22, which shows it fully open).

[0054] The cover portion 14 is set so that it fits inside the side plate portions 23W on both sides of the chassis portion 23, and the cover portion 14 is placed on the chassis portion 23 and slid towards the rear (see Figure 22, 10-2). The contact surface CFT between the chassis portion 23, which has a 90° bend in the left side portion 15L and the right side portion 15R of the main cover 15, is tapered so that the bent portion at the rear is narrower and the front is wider (see Figure 20). As the cover portion 14 is slid completely while being guided in the left-right direction, it is fixed in the left-right direction because it is designed to become vertical. Then the sub cover 21 is rotated in the direction to be locked (see Figure 22, 10-3).

[0055] When the sub-cover 21 and the main locking part 19 are locked together, the front-to-back direction is fixed, and at the same time, the hook part TL of the main cover 15 and the hook part OL of the sub-cover 21 fix the vertical direction, completing the installation of the cover part 14 (see 10-4 in Figure 22).

[0056] (Explanation of effects) As described above, the second embodiment offers the advantage of a less expensive cover in addition to the advantages of the first embodiment, because the auxiliary locking part 18 is no longer required.

[0057] Although the present invention shows an example in which circuit boards are stacked in two layers, there is no limit to the height. By changing the height of the chassis sides, the shape of the lock lever bracket, the position of the spacer that serves as the rotation axis of the lock member RK, the shape of the lock member RK, the length of each side of the main cover 15, and the size of the sub-cover, it is possible to accommodate various numbers of layers and sizes of circuit boards. [Explanation of Symbols]

[0058] 1 cabinet 14. Cover section 15 Main cover 16 Lock lever bracket 17 Spacers 18 Auxiliary locking mechanism 18FK, 19FK, OL, TL hook section 19 Main lock section 21 Subcover 23 Chassis section 26 Retaining rail section 27 posts RR release part RK locking component

Claims

1. An electronic device unit that is equipped with electronic devices and can be housed inside a casing, A chassis portion having a mounting surface on which the aforementioned electronic equipment is mounted, It has a box-shaped cover portion that is detachable from the chassis portion, which has a top portion and side portions that cover the mounting surface, The front portion of the side portion that becomes the front when the cover portion is stored in the housing is rotatable with respect to the top portion. The side portion of the cover is provided with a locking member having a locking portion that prevents the front portion from rotating relative to the top portion. The locking member is characterized by having a release portion that, when pressed from the front portion, releases the locking portion from preventing the front portion from rotating.

2. The locking member further comprises a fixing means for fixing the cover portion to the chassis portion, which is an auxiliary locking portion that prevents the movement of the chassis portion. The chassis portion has an engaged portion that engages with the auxiliary locking portion, The electronic device unit according to claim 1, characterized in that the movement of the chassis portion is prevented and released by the engagement and disengagement of the auxiliary locking portion and the engaged portion in accordance with the movement of the release portion of the locking member.

3. The cover portion further comprises fixing means for fixing the cover portion to the chassis portion, The front portion has a hook-shaped engaging portion that engages with the chassis portion and prevents the movement of the chassis portion as a fixing means. The rear side portion of the cover portion, which becomes the rear when the cover portion is stored in the housing, has a hook-shaped engaging portion as a fixing means that engages with the chassis portion and prevents the movement of the chassis portion. The electronic device unit according to claim 1, characterized in that the movement of the chassis portion is prevented and released by the engagement and disengagement of the engaging portions on the front and rear portions and the chassis portion in accordance with the movement of the release portion of the locking member.

4. The electronic device unit according to claim 2 or 3, characterized in that the release portion of the locking member is pressed by contacting a part of the housing.

5. A cover that covers the mounting surface of an electronic device unit having a mounting surface for mounting electronic devices and being housed inside a housing, The top surface portion that covers the mounting surface, The front portion, which becomes the front when the electronic device unit is housed in the housing and is rotatably mounted to the top portion, The front portion has a side portion on which a locking member is provided, which has a locking portion that prevents the front portion from rotating relative to the top portion. The locking member is characterized by having a release portion that releases the restriction on the rotation of the front portion by the locking portion which is pressed from the front portion side.

Images