JP2007335593A - Electronic-equipment casing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic-equipment casing capable of surely holding a chassis by a snap-fit even when a case is deformed when electronic equipment is fitted on a wall surface or the like. <P>SOLUTION: Case mounting sections 16a and 16b are fitted at centers at the front end and rear end of a case body 11. A plurality of reinforcing members 23 are fitted inside the front end wall of the case body 11, and a chassis engagement is constituted by forming notches to the lower section of the inside of the front end wall. When the chassis 31 is mounted in the case body 11, the front end of a chassis bottom plate 32 is placed at the chassis engagement. The snap-fits 34 and 35 for fixing the chassis 31 and bosses 36 and 37 for a positioning are mounted near the rear end wall of the case body 11. Then, engagements 38 and 39 are projected and installed in the rear-end direction so as to correspond to the bosses 36 and 37 for the positioning to the chassis 31, the upper sections of the bosses 36 and 37 for the positioning are inserted into engaging holes at the center of the chassis, and the place of the chassis 31 is fixed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic device casing such as a receiving terminal for FTTx (Fiber To The x).

In recent years, in a cable television system, not only a service for a television but also a service for the Internet has been performed. For this reason, high-speed and large-capacity data transmission is required, and it is installed in FTTH (Fiber To The Home) that draws optical fiber into each home instead of the coaxial cable that has been used in the past, or in apartment buildings and buildings such as condominiums. An FTTx (Fiber To The x) system such as an FTTB (Fiber To The Building) that draws an optical cable to a main distribution board (MDF) is widely used. An optical receiving terminal used in this FTTx system is installed in a subscriber's house (see, for example, Patent Document 1).
JP-A-8-18514

  An electronic device such as an optical receiving terminal used in the FTTx system or the like uses a synthetic resin member to form a device housing. In order to simplify the assembly, a chassis to be housed in a case is provided. It is fixed using the elastic force of the snap fit provided in the case. And the said electronic device housing | casing is used by attaching the attaching part provided in the outer side of a case to the outer wall surface etc. of a house with a wood screw etc.

  Since the casing of the electronic device is made of a synthetic resin, the case is deformed according to the state of the wall surface when the wall surface is not flat when attached to the outer wall surface of the house. In conventional electronic devices, the chassis is simply fixed in the case using the elastic force of snap fit, so if the case is deformed when it is mounted on the wall, the positional relationship between the chassis and the snap fit will shift. There was a problem that the snap fit would come off from the chassis.

  In addition, since the electronic device is used by being vertically attached to an outer wall surface of a house or the like, a cover holding mechanism for holding the cover in an open state is required when the case cover is opened by maintenance work or the like.

  Further, the electronic device has a double structure in which a security cover is provided on the inner side of the case cover so that the user does not touch the parts mounted in the case by mistake. For this reason, when the case cover and the security cover are opened in maintenance work of the electronic device, the open end of the security cover is fixed by the case cover so that the security cover does not interfere with the work. In this case, conventionally, since the security cover is held by providing a holding part on the case cover, a part for holding the security cover is necessary and there is a problem that the number of parts increases.

  Moreover, since the said electronic device is considered when attaching to the external wall surface etc. of a house, a waterproof structure is requested | required.

  The present invention has been made to solve the above-described problem. When the electronic device is attached to a wall surface or the like, the chassis and snap fit are placed at predetermined positions even when the wall surface is not flat and the case is deformed. It is an object of the present invention to provide an electronic device housing that can maintain the relationship and can securely hold the chassis by a snap fit.

  The present invention also includes an electronic device that includes a cover holding mechanism that holds the case cover in an open state, and that can easily hold the open end of the security cover with the case cover when the case cover and the security cover are opened. An object is to provide a housing.

  An electronic device casing according to a first aspect of the present invention includes a case body made of a synthetic resin, a case mounting portion provided outside the case body, and a case rotatably provided so as to cover an opening of the case body. A cover, a chassis mounted in the case body, a chassis locking portion that is provided in the case body and holds one end of the chassis, and is provided in the case body, the other of the chassis A snap fit for detachably holding the end, a positioning boss provided in the case body corresponding to the snap fit, and provided in the chassis, and when the chassis is held by the snap fit, And an engaging portion that is engaged with the positioning boss and restricts the mounting position.

  An electronic device casing according to a second invention includes a case body made of a synthetic resin, a case mounting portion provided outside the case body, a case cover provided in an opening of the case body, and the case body. A hinge part provided at the rear part on both sides and rotatably holding the case cover, and provided on both side parts of the case body, the case abuts against the hinge part when the case cover is opened to a predetermined position. An opening restricting member for restricting the opening of the cover and provided on the outside of the rear end wall of the case cover. When the case cover is opened to a substantially maximum opening, the side edge of the rear end wall of the case cover is contacted from the front side. A cover holding member that contacts and holds the position of the case cover, and the cover holding member holds the case cover in an open state within a range where a certain force is applied. To.

  According to a third aspect of the present invention, in the electronic device casing according to the second aspect of the present invention, a chassis attached in the case main body, and a security cover rotatably provided on the case main body so as to cover an upper portion of the chassis , A security cover locking projection provided on the front end wall of the case cover, and provided on the case cover corresponding to the security cover locking projection, with the case cover and the security cover opened, The security cover locking projection is inserted and locked.

  An electronic device casing according to a fourth aspect of the present invention is a case provided so as to cover a case body made of synthetic resin, a case mounting portion provided outside the case body, and an opening of the case body. A first cover, a cover, a rear end wall of the case body, and outer peripheries of both side surfaces provided at predetermined intervals, and having a waterproof function by contacting the case cover when the case cover is closed; A fourth waterproof wall and a third waterproof wall are provided inside the rear end wall of the case cover and have a waterproof function by abutting against the first and third waterproof walls, respectively, when the case cover is closed. The first waterproof wall is provided at a position in contact with the periphery of the case cover side surface on both side surfaces of the case body, and a surface located on the bottom surface side of the case body is formed in a tapered shape. It is characterized by.

  According to the first invention, the case body is provided with a positioning boss together with a snap fit, and the positioning boss is engaged with the engaging portion on the chassis side to fix the position of the chassis, thereby Even if the case is deformed when it is attached to the wall surface of a house, it is possible to prevent the chassis and snap fit from being displaced and to hold the chassis securely in place.

  According to the second invention, an opening restricting member for restricting the maximum opening degree of the case cover is provided at both rear portions of the case body, and a cover holding member is provided on the rear end wall of the case body so that the case cover does not close by its own weight. As a result, when the case cover is opened, it can be held in an optimum state.

  According to the third invention, the cover locking protrusion provided on the front end wall of the case cover can be inserted and locked into the slit of the security cover, and the security cover can be secured with a simple structure without adding parts. When opened, it can be securely fixed to the case cover.

  According to the fourth invention, a plurality of waterproof walls are provided along the outer periphery of the rear end wall and both side surfaces of the case body, and a waterproof wall is provided on the inner side of the rear end wall of the case cover to form a multi-stage waterproof structure. Furthermore, since the surface located on the bottom side of the case body is tapered with respect to the waterproof wall at the position on both sides of the case body that touches the periphery of the case cover side surface, the water pressure applied to the waterproof wall is dispersed. It is possible to reliably prevent rainwater and the like from entering the housing.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 6 show configuration examples when the present invention is implemented in an electronic device casing such as an optical receiving terminal.
1A and 1B show a configuration of a case body side of an electronic device housing, where FIG. 1A is a front view, FIG. 1B is a left side view, and FIG. 1C is a cross-sectional view taken along line AA in FIG. FIG. 4D is a plan view.
FIG. 2 is a front view showing a state in which the chassis is attached to the case body.
3A and 3B show a state in which the case cover and the security cover are attached to the case body. FIG. 3A is a perspective view showing a state in which the case cover and the security cover are opened, and FIG. 3B is a perspective view showing a main part of the case cover. FIG. 4C is a cross-sectional view showing a joint portion between the security cover and the case cover.
4A and 4B show a state in which the case cover is closed, in which FIG. 4A is a front view, FIG. 4B is a left side view, and FIG.
FIG. 5A is a plan view showing the essential part of FIG. 4A in cross section, and FIG. 5B is an enlarged view of portion A of FIG. 5A.
6A and 6B show a state where the case cover is attached to the case body. FIG. 6A is a front view showing a state where the case is opened, FIG. 6B is a side view, and FIG. 6C is A in FIG. FIG.

  In FIG. 1 to FIG. 3, reference numeral 10 denotes an electronic device casing formed of a synthetic resin such as an ABS resin, and includes a case body 11, a case cover 12, and a security cover 13.

  The case cover 12 is rotatably provided by the hinge portion 14 so as to cover the upper surface opening of the case main body 11. The hinge part 14 is provided on both sides of the rear part of the case body 11 and holds the case cover 12 so as to be rotatable. Further, on both sides in the case main body 11, columnar protrusions 15a and 15b are provided at the upper rear position, and holes provided on both sides of the rear portion of the security cover 13 are engaged with the protrusions 15a and 15b. It is provided so as to be rotatable.

  At the front end and the rear end of the case body 11, case attachment portions 16 a and 16 b are provided to project at the center on the bottom side, and attachment holes 17 a and 17 b are provided at the center thereof. The electronic device casing 10 has the case attaching portions 16a and 16b attached vertically to, for example, an outer wall surface of a house with wood screws or the like.

  Hereinafter, regarding [chassis holding mechanism], [case cover locking and fixing mechanism], [security cover support mechanism], [case cover holding mechanism], and [waterproof mechanism] provided in the electronic device casing 10 according to the above embodiment. explain.

[Chassis retention mechanism]
As shown in FIG. 1, the case body 11 is provided with protrusions 21 on the bottom plate in a lattice pattern, and a plurality of protrusions 22 are also provided on the inner surfaces of both side walls at predetermined intervals. The protrusions 21 and 22 improve the strength of the case body 11. Further, a plurality of reinforcing members 23 and 24 are provided inside the front end wall and the rear end wall of the case body 11. The reinforcing members 23 and 24 are tapered so that the upper end side is narrow and the lower end side is wide. Further, as shown in FIGS. 1C and 6C, the reinforcing member 23 on the front end wall is provided with a notch in the lower portion to constitute a chassis locking portion 25.

  As shown in FIGS. 2 and 6, when the chassis 31 is mounted in the case body 11, the front end of the chassis bottom plate 32 is positioned at the chassis locking portion 25.

  The chassis 31 is formed at a predetermined height as shown in FIGS. 2 and 3, and electronic components are mounted on the upper surface and inside thereof. The chassis 31 includes the chassis bottom plate 32, and the front end thereof extends to the front end wall side of the case body 11.

  In the case body 11, a plurality of, for example, two snap fits 34 and 35 are provided on the case bottom plate in the vicinity of the rear end wall. The snap fits 34 and 35 are formed higher than the chassis 31, and claws 34 a and 35 a are provided at positions corresponding to the upper surface of the chassis 31. Further, cylindrical positioning bosses 36 and 37 are provided on the case bottom plate so as to be positioned on the sides of the snap fits 34 and 35. The cylindrical positioning bosses 36 and 37 are formed so that their upper ends are slightly higher than the claws 34a and 35a of the snap fits 34 and 35. On the other hand, on the upper surface of the chassis 31, engaging portions 38 and 39 are provided so as to protrude in the rear end direction so as to correspond to the positioning bosses 36 and 37, and the center portions thereof engage with the positioning bosses 36 and 37. A hole is formed. Further, a plurality of, for example, two engaging protrusions 41 a and 41 b are provided on the bottom plate of the case body 11 in the vicinity of the front end side. On the other hand, the chassis bottom plate 32 is provided with engagement holes 42a and 42b at positions corresponding to the engagement protrusions 41a and 41b.

  When the chassis 31 is mounted in the case body 11, the front end of the chassis bottom plate 32 is positioned at the chassis locking portion 25 formed on the reinforcing member 23 of the front end wall of the chassis, and then the rear end of the chassis 31 is snap-fit. The chassis 31 is locked to the claws 34a and 35a of the snap fits 34 and 35 by pushing down against the elastic force of 34 and 35. At this time, the engagement protrusions 41a and 41b on the case body 11 side are inserted into the engagement holes 42a and 42b provided on the chassis bottom plate 32, and the engagement portions 38 and 39 provided on the rear end side of the chassis 31 are engaged. The positioning bosses 36 and 37 are inserted into the joint holes, and the chassis 31 is fixed at a predetermined position.

  As described above, the positioning bosses 36, 37 are provided on the sides of the snap fits 34, 35 and engaged with the engaging portions 38, 39 provided on the chassis 31, thereby securely fixing the position of the chassis 31. Even if the case body 11 is deformed when the electronic device casing 10 is attached to the wall surface, the positional deviation between the chassis 31 and the snap fits 34, 35 can be prevented, and the chassis 31 can be securely held by the snap fits 34, 35. It is configured as follows.

[Case cover locking and fixing mechanism]
Further, as shown in FIG. 3, a resilient hook 41 is provided on the upper part of the front end wall of the case body 11, and a locking groove 43 is provided at a position corresponding to the hook 41 on the front end side of the case cover 12. Provided. As shown in FIG. 4, when the case cover 12 is closed, the hook 41 is inserted into the locking groove 43, and the case cover 12 is locked by the claw at the upper end of the hook 41. When the case cover 12 is closed, the upper end of the hook 41 protrudes upward from the locking groove 43. When the upper end of the hook 41 is pushed, for example, toward the front end (front side) of the case cover 12, the lock is released. 12 can be rotated upward to open.

Further, the case body 11 is provided with a plurality of plug attachment holes 44 in the front end wall, and cover fixing portions 45a and 45b are formed on both sides of the front end. The cover fixing portions 45a and 45b are provided with screw forming holes 46a and 46b at the center thereof. On the other hand, on both sides of the front end of the case cover 12, cover fixing portions 47a and 47b are provided corresponding to the cover fixing portions 45a and 45b of the case body 11, as shown in FIG. Screws 48a and 48b are screwed onto the screw. Then, with the case cover 12 closed, the screws 48a and 48b provided on the case cover 12 side are screwed into the screw formation holes 46a and 46b of the cover fixing portions 45a and 45b provided on the case body 11 side. By doing so, the case cover 12 can be fixed to the case body 11. Security cover fixing part [Security cover support mechanism]
As shown in FIG. 3, a security cover fixing part 51 having a predetermined height is provided on the upper surface of the chassis 31. The security cover fixing portion 51 is bent at a right angle so that the upper portion is parallel to the upper surface of the chassis 31, and a screw hole 52 is formed in the bent portion. On the other hand, the security cover 13 is provided with a screw insertion hole 53 at a position corresponding to the screw hole 52 of the security cover fixing portion 51. The security cover 13 can be fixed on the chassis 31 by inserting, for example, a mischief prevention screw into the screw insertion hole 53 with the security cover 13 closed, tightening with a special tool, and screwing into the screw hole 52. When the security cover 13 is fixed using a mischief prevention screw as described above, since the mischief prevention screw cannot be loosened unless a special tool is used, the chassis 31 is protected from being touched from the outside. be able to.

  As shown in FIG. 3, the security cover 13 can be held by the case cover 12 when it is opened, for example, due to maintenance. In other words, security cover locking projections 55 and 56 are provided on the front end wall of the case cover 12 in the vicinity of the left and right sides. The security cover locking projection 55 has two snap fits 57a and 57b on both sides of a groove provided in the center. In this case, the snap fits 57a and 57b are formed so that the claws formed at the tips are tapered and the claws of the snap fit 57a are directed inward of the case cover 12, for example, so that the claws face in opposite directions. The claw 57b faces the outer side of the case cover 12. Similarly to the security cover locking projection 55, the security cover locking projection 56 is formed with two snap fits 58a, 58b on both sides of the groove provided in the center, and the tip of each snap fit 58a, 58b. The claws formed on the slab are directed in opposite directions.

  On the other hand, the security cover 13 is formed with slits 59 and 60 at positions corresponding to the security cover locking projections 55 and 56 provided on the case cover 12. With the case cover 12 and the security cover 13 open, the security cover locking projections 55 and 56 are inserted into the slits 59 and 60 by pressing the front end of the security cover 13 against the case cover 12, and the snap fit 57a. , 57b and snap fits 58a, 58b secure the security cover 13 to the case cover 12. In this case, since the snap fits 57a and 57b and the snap fits 58a and 58b are respectively directed in opposite directions, the security cover 13 can be securely fixed when inserted into the slits 59 and 60. .

  Further, the claws formed in the snap fits 57a and 57b and the snap fits 58a and 58b are tapered, and the security cover 13 is protruded from the slits 59 and 60 by applying a force to the security cover 13 and pulling it. The security cover 13 can be easily removed from the case cover 12.

[Case cover holding mechanism]
The electronic device casing 10 is provided with a case cover holding mechanism that holds the case cover 12 in an optimal position when the case cover 12 is opened.

  The case cover 12 is rotatably held by the hinge part 14 as described above. As shown in FIG. 4, the case cover 12 is provided with a substantially semicircular holding member 61 at the hinge portion 14, and the shaft of the hinge portion 14 is inserted into a shaft hole 62 provided at the center of the semicircle of the holding member 61. It is adapted to rotate by fitting. In addition, at both rear portions of the case body 11, an opening restriction member 63 is provided adjacent to the lower side of the holding member 61. The opening restricting member 63 has a shape corresponding to the shape on the lower side of the holding member 61, and when the case cover 12 is opened to a predetermined position, the outside of the holding member 61 contacts the opening restricting member 63. The case cover 12 is regulated so as not to open too much.

  Further, as shown in FIGS. 1 and 5, cover holding members 65a and 65b for holding the case cover 12 in an open state are horizontally arranged at predetermined intervals on the outside of the rear end wall of the case body 11. Provided. The cover holding members 65a and 65b are for holding the case cover 12 so as not to be closed by its own weight when the case cover 12 is opened. When the case cover 12 is opened as shown in FIG. The side edge of the rear end wall is provided at a position where it abuts against the cover holding members 65a and 65b. In this case, when the case cover 12 is opened, the side edge of the rear end wall of the case cover 12 comes into contact with the front edge of the cover holding members 65a and 65b immediately before reaching the maximum opening degree. The rear end wall of the case cover 12 reaches the opposite side beyond the cover holding members 65a and 65b. At this time, the case cover 12 is opened to the maximum opening. In this state, even if the case cover 12 is closed by its own weight, the rear end wall of the case cover 12 comes into contact with the rear edges of the cover holding members 65a and 65b, and the case cover 12 is held open.

  When the case cover 12 is closed, by applying a force in the closing direction, the rear end wall of the case cover 12 moves to the front edge side while being pressed against the cover holding members 65a and 65b. And the cover holding members 65a and 65b are disengaged, and can be closed as they are.

  As described above, the opening restriction member 63 for restricting the maximum opening degree of the case cover 12 is provided at the rear portions on both sides of the case body 11, and the cover holding members 65 a and 65 b are provided on the rear end wall of the case body 11. When the cover 12 is opened, it can be held in an optimum state.

[Waterproof mechanism]
The electronic device casing 10 is provided with a waterproof mechanism that protects the electronic device from rain or the like between the outer peripheral surface of the case body 11 and the inner peripheral surface of the case cover 12.

  As shown in FIGS. 1, 3 to 6, a plurality of first to third waterproof walls 71, 72, for example, along the outer peripheral surface of the case main body 11, that is, the outer periphery of the rear end wall and both side surfaces of the case main body 11. 73 are provided at predetermined intervals. In this case, the waterproof walls 72 and 73 located on the opening side of the case body 11 have a rectangular cross section and are provided with the same outer peripheral surface. Further, the waterproof wall 71 has the same shape as the waterproof walls 72 and 73 on the rear end wall side of the case body 11, but is formed higher on the both side surfaces than the other waterproof walls 72 and 73 as shown in FIG. 5. At the same time, the front end side is formed in a stepped shape, and has a structure having a high waterproof action by being combined with the front end side of both side walls of the case cover 12. At this time, it is set so that the front end position of the waterproof wall 71 and the outer side surfaces of the case cover 12 are the same surface. The waterproof wall 71 has a lower side surface, that is, a bottom plate side surface 74 formed in a tapered shape. Further, on both side surfaces of the case body 11, side surfaces 75 located on the bottom plate side from the waterproof wall 71 are lower than the side surfaces of the case cover 12.

  That is, when the case cover 12 is closed with respect to the case body 11, the side edges of the case cover 12 are coupled to the waterproof wall 71 on both sides of the case body 11 as shown in FIG. The inner side surfaces of the side portions are in contact with the waterproof walls 72 and 73 so as to have a waterproof action. In this case, a high waterproof action is obtained by the combination of the side edge of the case cover 12 and the waterproof wall 71, but the waterproof walls 72 and 73 are further provided inside the waterproof wall 71 to provide the waterproof action. Therefore, the waterproof function can be further improved.

  Further, the side surface of the case main body 11, that is, the side surface 75 positioned on the bottom plate side from the waterproof wall 71 is formed lower than the side outer surface of the case cover 12, and the tapered surface 74 is formed on the waterproof wall 71. As shown in FIG. 5A, even when rain hits the waterproof wall 71 and a high water pressure 76 is applied, the water pressure 76 is applied to the side surface of the case body 11 by the tapered surface 74 of the waterproof wall 71. It is possible to escape to the 75 side, and the water pressure 76 applied to the joint between the waterproof wall 71 and the case cover 12 can be weakened. Thereby, the waterproof effect can be further enhanced.

  Further, as shown in FIGS. 4 and 6, two waterproof walls 81 and 82 are formed on the case cover 12 inside the rear end wall. The waterproof wall 81 is formed in a state in which the side edge of the rear end wall of the case cover 12 is bent, and contacts the lower side of the waterproof wall 71 located on the rear end wall of the case body 11 when the case cover 12 is closed. It is provided to touch. Further, the waterproof wall 82 is provided inside the rear end wall of the case cover 12 so as to come into contact with the lower side of the waterproof wall 73 located on the rear end wall of the case body 11 when the case cover 12 is closed.

  That is, when the case cover 12 is closed as shown in FIG. 4, the inner side of the rear end wall of the case cover 12 abuts the periphery of the rear waterproof walls 71, 72, 73 of the case body 11, and the waterproof wall of the case cover 12 81 and 82 and the side walls of the waterproof walls 71 and 73 of the case main body 11 are in contact with each other so as to have a waterproof action. Thus, by forming a waterproof structure of a plurality of stages by the waterproof walls 71, 72, 73 provided on the rear end wall of the case body 11 and the waterproof walls 81, 82 provided on the inner side of the rear end wall of the case cover 12, It can have a very high waterproof action.

  As described above, a plurality of waterproof structures are formed at the rear and both sides of the electronic device casing 10, and when the electronic device casing 10 is vertically mounted on an outer wall of a house, rainwater into the casing Etc. can be reliably prevented.

  As described above, according to the above-described embodiment, the chassis 31 is held by the snap fits 34 and 35 provided in the case body 11, and the positioning bosses 36 and 37 are provided on the sides of the snap fits 34 and 35. Even if the case body 11 is deformed when the electronic device casing 10 is attached to the wall surface by engaging the engaging portions 38 and 39 on the 31 side to fix the position of the chassis 31, the snap fit with the chassis 31 is possible. 34 and 35 can be prevented from being displaced, and the snap fits 34 and 35 can be prevented from being detached from the chassis 31 so that the chassis 31 can be securely held at a predetermined position.

  Further, security cover locking projections 55 and 56 are provided on the front end wall of the case cover 12, and slits 59 and 60 are formed at positions corresponding to the security cover locking projections 55 and 56 of the security cover 13. Since the security cover locking projections 55 and 56 are inserted and locked in the slits 59 and 60, the case can be opened when the security cover 13 is opened with a simple structure without adding parts. It can be fixed to the cover 12.

  Further, an opening restricting member 63 for restricting the maximum opening degree of the case cover 12 is provided at both side rear portions of the case main body 11, and cover holding members 65 a and 65 b are provided on the rear end wall of the case main body 11 so that the case cover 12 has its own weight. Therefore, when the case cover 12 is opened, it can be held in an optimum state.

  A plurality of waterproof walls 71, 72, 73 are provided at predetermined intervals along the outer periphery of the rear end wall and both side surfaces of the case body 11, and the waterproof walls 71, 73 are provided inside the rear end wall of the case cover 12. Correspondingly, waterproof walls 81 and 82 are provided to provide a waterproof structure with a plurality of stages, and the waterproof wall 71 is provided with a tapered surface 74 so as to disperse water pressure due to rainwater or the like. Can be reliably prevented.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage.

1 shows a configuration of a case main body side of an electronic device casing according to an embodiment of the present invention, in which (a) is a front view, (b) is a left side view, and (c) is an A- in FIG. A sectional view taken along line A, (d) is a plan view. In the same embodiment, it is a front view which shows the state which attached the chassis to the case main body. In the embodiment, a case cover and a security cover are shown attached to the case body, (a) is a perspective view showing a state in which the case cover and the security cover are opened, and (b) is a main part of the case cover. The perspective view shown and (c) are sectional drawings which show the coupling | bond part of a security cover and a case cover. In the embodiment, the case cover is shown closed, (a) is a front view, (b) is a left side view, and (c) is a right side view showing a cross section of the main part. FIG. 5A is a plan view showing a cross section of the main part of FIG. 4A, and FIG. 5B is an enlarged view showing a cross section of the main part. In the embodiment, a case cover is shown attached to a case body, (a) is a front view showing a state in which the case is opened, (b) is a side view, and (c) is the same view (a). It is AA sectional view taken on the line.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Electronic device housing | casing, 11 ... Case main body, 12 ... Case cover, 13 ... Security cover, 14 ... Hinge part, 15a, 15b ... Projection part, 16a, 16b ... Case attaching part, 17a, 17b ... Mounting hole, 21 , 22 ... ridges, 23, 24 ... reinforcing members, 25 ... chassis locking portion, 31 ... chassis, 32 ... chassis bottom plate, 34, 35 ... snap fit, 34a, 35a ... claws, 36, 37 ... positioning bosses, 38, 39 ... engaging portion, 41a, 41b ... engaging projection, 41 ... hook, 42a, 42b ... engaging hole, 43 ... locking groove, 44 ... plug mounting hole, 45a, 45b ... cover fixing portion, 46a , 46b ... Screw formation hole, 47a, 47b ... Cover fixing part, 48a, 48b ... Screw, 51 ... Security cover fixing part, 52 ... Screw hole, 53 ... Screw insertion hole, 55, 56 ... Security Tee cover locking projections, 57a, 57b, 58a, 58b ... snap fit, 59, 60 ... slit, 61 ... holding member, 62 ... shaft hole, 63 ... opening restriction member, 65a, 65b ... cover holding member, 71 , 72, 73 ... waterproof wall, 74 ... tapered surface of the waterproof wall 71, 75 ... side surface of the case body 11, 76 ... water pressure, 81, 82 ... waterproof wall

Claims (4)

  A case body made of synthetic resin, a case mounting portion provided outside the case body, a case cover rotatably provided so as to cover an opening of the case body, and a chassis mounted in the case body A chassis locking portion provided in the case body and holding one end of the chassis; a snap fit provided in the case body and detachably holding the other end of the chassis; A positioning boss provided in the case main body corresponding to the snap fit, and provided in the chassis, and when the chassis is held by the snap fit, is engaged with the positioning boss to regulate the mounting position. An electronic device housing comprising an engaging portion.   A case body made of synthetic resin, a case mounting portion provided on the outside of the case body, a case cover provided at an opening of the case body, and provided on both side rear portions of the case body, and rotating the case cover A hinge part that can be held, and an opening restriction member that is provided on both side parts of the case body, and that contacts the hinge part when the case cover is opened to a predetermined position to regulate the opening degree of the case cover; A cover holder that is provided outside the rear end wall of the case cover, and holds the position of the case cover by contacting the rear end wall side edge of the case cover from the front side when the case cover is opened to a substantially maximum opening. And the cover holding member holds the case cover in an open state within a range where a certain force is applied.   3. The electronic device casing according to claim 2, wherein a chassis attached in the case body, a security cover rotatably provided on the case body so as to cover an upper portion of the chassis, and a front end wall of the case cover A security cover locking protrusion provided on the case cover, and the security cover locking protrusion provided in the case cover corresponding to the security cover locking protrusion. An electronic device housing comprising a slit into which a portion is inserted and locked.   A case body made of synthetic resin, a case mounting portion provided outside the case body, a case cover rotatably provided so as to cover an opening of the case body, a rear end wall and both sides of the case body First, second, and third waterproof walls provided at predetermined intervals along the outer periphery of the surface and having a waterproof function by contacting the case cover when the case cover is closed, and the rear of the case cover Provided on the inner side of the end wall and having a waterproof function by contacting the first and third waterproof walls when the case cover is closed. An electronic device housing, wherein the waterproof wall is provided at a position in contact with a peripheral edge of the side surface of the case cover on both side surfaces of the case body, and a surface located on the bottom surface side of the case body is formed in a tapered shape.

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