Electric apparatus

Abstract

To provide an electric apparatus with which constant waterproofness can be expected even without interposing a waterproof cover, etc., between a space that water may enter and a circuit board in a main body case.SOLUTION: Shield ribs 18 and 18 protruding backward are provided at positions adjacent inside in a lateral direction of drain holes 14 and 14 on a rear face of a front plate 11a. On the other hand, a microphone substrate 30 in which a microphone 31 is mounted in the substantial center of a front face and flat plate parts 33 and 33 in which an electronic circuit is not formed are provided in both right and left ends of the front face is made to abut on tip ends of the shield ribs 18 and 18 and installed in a state where the flat plate parts 33 and 33 protrude from the shield ribs 18 and 18 to a rear side of the drain holes 14 and 14. A waterproof rib 17 protruding backward is provided on the rear face of the front plate 11a, such that an upper side of the drain holes 14 and 14 is covered by the waterproof rib 17. Further, an inner wall 21 extending in the lateral direction along a lower edge of the front plate 11a is provided on the rear face of the front plate 11a.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an electric device having a circuit board installed in a main body case. [Background technology]

[0002] Conventionally, electrical devices having a circuit board built into a main body case have been provided with various waterproof structures to prevent water from reaching the circuits formed on the surface of the circuit board. For example, the invention described in Patent Document 1 provides a waterproof structure in which a drain outlet is provided at the bottom of the main body case, a drain space for guiding water to the drain outlet is provided by providing ribs or the like on the inner surface of the main body case, a waterproof cover is attached to cover the drain space from the rear, and the circuit board is placed behind the waterproof cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-192215 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the configuration in which a waterproof cover is interposed between the drainage space and the circuit board as described in Patent Document 1 increases the number of parts, which leads to a problem of increased costs.

[0005] Therefore, the present invention has been made in consideration of the above problems, and aims to provide an electrical device that can be expected to have a certain level of waterproofness without interposing a waterproof cover or the like between the space inside the main body case into which water can enter and the circuit board. [Means for solving the problem]

[0006] In order to achieve the above object, the invention described in claim 1 of the present invention is an electrical device having a hole in the front panel of a main body case and a circuit board installed inside the main body case, characterized in that the circuit board has a flat portion on the surface of which no electronic circuits are formed, and the circuit board is installed inside the main body case so that the flat portion covers the rear of the hole, and the flat portion prevents water that has entered through the hole from moving rearward. According to the invention described in claim 1, the circuit board is provided with a flat plate portion on the surface of which no electronic circuit is formed, and the circuit board is installed inside the main body case so that the flat plate portion covers the rear of the hole, so that the flat plate portion prevents water that has entered through the hole from moving rearward. This results in a rational structure that does not require the installation of a separate member such as a waterproof cover, which reduces the number of parts and ultimately helps to keep costs down.

[0007] The invention described in claim 2 is characterized in that, in the invention described in claim 1, a shielding rib that protrudes rearward is provided on the rear surface of the front plate, and the circuit board is installed with its front surface abutting against the tip of the shielding rib and with its flat plate portion protruding from the shielding rib to the rear side of the hole, and the circuit board and the shielding rib prevent water that has entered through the hole from moving beyond the shielding rib. According to the invention described in claim 2, a shielding rib that protrudes rearward is provided on the rear surface of the front plate, and the circuit board is installed with its front surface abutting against the tip of the shielding rib and with its flat plate portion protruding from the shielding rib to the rear side of the hole, so that the circuit board and the shielding rib prevent water that has entered through the hole from moving beyond the shielding rib. Therefore, waterproofing can be improved in a structure that does not require the installation of a separate member such as a waterproof cover. [Effects of the Invention]

[0008] According to the present invention, the circuit board is provided with a flat portion on the surface of which no electronic circuit is formed, and the circuit board is placed inside the main body case so that the flat portion covers the rear of the hole, preventing water that has entered through the hole from moving rearward by the flat portion. This results in a rational structure that does not require the installation of a separate component such as a waterproof cover, reducing the number of parts and ultimately suppressing costs. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective explanatory view showing the appearance of a surveillance camera. [Figure 2] FIG. 2 is an explanatory diagram showing the front of the main body case with the decorative panel removed. [Figure 3] FIG. 2 is an explanatory diagram showing the rear surface of the front case on which the microphone board is installed. [Figure 4] 4 is an explanatory diagram showing a state in which the microphone board is removed from the state shown in FIG. 3. FIG. [Figure 5] FIG. 2 is a perspective explanatory view showing the microphone board from the front. [Figure 6] FIG. 2 is a perspective explanatory view showing the rear surface of the front case. [Figure 7] 3 is an explanatory diagram showing an enlarged view of a part of the cross section taken along the line AA in FIG. 2. FIG. [Figure 8] 3 is an explanatory diagram showing an enlarged view of a part of the cross section taken along the line BB in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0010] A waterproof structure for a camera device according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0011] FIG. 1 is an explanatory perspective view showing the exterior of the surveillance camera 1. FIG. 2 is an explanatory view showing the front of the main body case 10 with the decorative panel 9 removed. FIG. 3 is an explanatory view showing the rear of the front case 11 on which the microphone board 30 is installed. FIG. 4 is an explanatory view showing the state in which the microphone board 30 has been removed from the state shown in FIG. 3. FIG. 5 is an explanatory perspective view showing the microphone board 30 from the front. FIG. 6 is an explanatory perspective view showing the rear of the front case 11. FIG. 7 is an explanatory view showing an enlarged portion of the cross section taken along line AA in FIG. 2. FIG. 8 is an explanatory view showing an enlarged portion of the cross section taken along line BB in FIG. 2.

[0012] The surveillance camera 1 comprises a camera device 2 having a camera section 4 and a microphone section 5, and a communication device 3 for transmitting and receiving images captured by the camera section 4 to and from other devices. The communication device 3 is connected to the rear of the camera device 2 via an angle adjustment mechanism 6. The attitude of the camera device 2 relative to the communication device 3 can be adjusted by rotating the angle adjustment mechanism 6 around an axis in the vertical direction and an axis in the horizontal direction. Such a surveillance camera 1 is used by installing the rear surface of the communication device 3 on an installation surface such as a wall.

[0013] Here, a waterproof structure provided in the main body case 10 of the camera device 2, which is a main part of the present invention, will be described. The camera device 2 includes a main body case 10 formed by assembling a front case 11 and a rear case 12, and a decorative panel 9 attached to cover the front surface of the main body case 10. The front case 11 includes a front panel 11a that is generally rectangular when viewed from the front, and a peripheral wall portion 11b that extends rearward from the outer periphery of the front panel 11a. A camera window 7 that constitutes the camera unit 4 is provided at the top of the front panel 11a. A sound collection unit 13 that constitutes the microphone unit 5 is provided at a location approximately in the center in the left-right direction at the bottom of the front panel 11a, and a microphone 31 (described later) is located behind the sound collection unit 13. In addition, drainage holes 14, 14 are provided on both the left and right sides of the sound collection unit 13 from the bottom of the front panel 11a to the peripheral wall portion 11b on the bottom side to drain water that has entered the main body case 10 out of the main body case 10.

[0014] A rearward-projecting inner wall 21 is provided around the periphery of the front panel 11a on the rear surface of the front panel 11a. The inner wall 21 is positioned a predetermined distance inward from the peripheral wall 11b, and a forward-recessed groove 22 formed between the peripheral wall 11b and the inner wall 21 can accommodate a waterproof gasket (not shown). A microphone storage compartment 15 for storing a microphone 31 is provided at the rear of the sound collection unit 13 on the lower rear surface of the front panel 11a. Adjacent to the left and right outer sides of the microphone storage compartment 15 are fixing bosses 16, 16 for screwing in a microphone board 30 on which the microphone 31 is mounted. Furthermore, mountain-shaped waterproof ribs 17, each sloping downward in the left-right direction from the top of the microphone storage compartment 15, are provided rearward above the microphone storage compartment 15 and the fixing bosses 16, 16 on the rear surface of the front panel 11a. Both left and right ends of the waterproof rib 17 extend beyond the drainage holes 14, 14. That is, the upper portions of the drain holes 14, 14 are covered with waterproof ribs 17.

[0015] Additionally, shielding ribs 18, 18 protruding rearward are provided on the left and right outer sides of the fixing bosses 16, 16 on the rear surface of the front panel 11a. Each shielding rib 18 extends vertically to connect the waterproof rib 17 to the bottom inner wall 21. Furthermore, a positioning protrusion 19 protruding further rearward is provided at the upper end of each shielding rib 18, i.e., the connection point with the waterproof rib 17, and capable of fitting into the notch 32 of the microphone board 30 when the microphone board 30 is screwed in. Drainage holes 14, 14 are located adjacent to the left and right outer sides of the shielding ribs 18, 18. Furthermore, cover portions 20, 20 that cover portions of the drainage holes 14, 14 from the rear are provided on the rear surface of the front panel 11a. Each cover portion 20 has a leg portion 20a that protrudes rearward from a point above the drainage hole 14, and a plate-shaped cover body 20b that extends downward from the tip of the leg portion 20a and is integrated with the bottom inner wall 21.

[0016] Meanwhile, the microphone board 30 has a microphone 31 mounted in approximately the center of its front surface. An electronic circuit (not shown) is formed in the center of the front surface of the microphone board 30. The left-right length of the microphone board 30 is approximately the same as the left-right length of the waterproof rib 17. The top edge of the microphone board 30 has the same mountain shape as the waterproof rib 17, with its apex at the center in the left-right direction. This allows the top edge of the microphone board 30 to abut against the underside of the waterproof rib 17 when the board is screwed to the front panel 11a. Furthermore, the top edge of the microphone board 30 has notches 32, 32 that can accommodate the positioning protrusions 19, 19. Additionally, flat plate portions 33, 33, which do not have any electronic circuitry and do not have any elements mounted on them, are provided at both left and right ends of the front surface of the microphone board 30, outside the notches 32, 32.

[0017] In the camera device 2 described above, when the microphone board 30 is screwed to the rear side of the front case 11, the microphone 31 is stored in the microphone storage section 15, the positioning protrusions 19 are inserted into the cutouts 32, and the rear ends of the shielding ribs 18 are in contact with the front surface of the microphone board 30. Therefore, the flat plate sections 33 protrude rearward from the drainage holes 14, and a drainage space 40 is formed around each drainage hole 14 in the main body case 10, surrounded on the front, upper, left and right inner sides, lower, and rear by the front plate 11a, waterproof rib 17, shielding rib 18, inner wall 21, and flat plate section 33 of the microphone board 30. Therefore, water that has flowed down the rear surface of the front panel 11a to the drainage space 40 or water that has infiltrated into the drainage space 40 from the drainage hole 14 by bouncing off the rear surface of the decorative panel 9, etc., does not move outside the drainage space 40 within the main body case 10, particularly toward the installation side of the microphone 31 and the rear case 12.

[0018] In the camera device 2 having the above-described configuration, rearward-protruding shielding ribs 18 are provided on the rear surface of the front plate 11a at positions adjacent to the inside of the drainage holes 14 in the left-right direction, while a microphone board 30 having a microphone 31 mounted in approximately the center of the front surface and flat plate portions 33 on both left and right ends of the front surface is installed with its front surface abutting against the tips of the shielding ribs 18 and the flat plate portions 33 protruding from the shielding ribs 18 behind the drainage holes 14. Furthermore, a waterproof rib 17 protruding rearward is provided on the rear surface of the front plate 11a, and the waterproof rib 17 covers the upper sides of the drainage holes 14. Furthermore, an inner wall 21 extending in the left-right direction along the lower edge of the front plate 11a is provided on the rear surface of the front plate 11a. Furthermore, a drainage space 40 is formed around each drainage hole 14 in the main body case 10, surrounded on the front, upper, left and right inner sides, lower, and rear by the front plate 11a, waterproof rib 17, shielding rib 18, inner wall 21, and flat plate portion 33 of the microphone board 30. Therefore, even without installing a waterproof cover or the like as conventionally used, it is possible to prevent water that has flowed down the rear surface of the front plate 11a to the drainage space 40 or water that has infiltrated into the drainage space 40 from the drainage hole 14 by bouncing off the rear surface of the decorative panel 9, from moving out of the drainage space 40 within the main body case 10, particularly beyond the shielding rib 18 toward the installation side of the microphone 31, and beyond the microphone board 30 toward the rear case 12.

[0019] The electrical equipment of the present invention is not limited to the above-described embodiments, and the overall configuration of the electrical equipment as well as the configuration related to the waterproof structure can be appropriately modified as needed without departing from the spirit of the present invention.

[0020] For example, in the above embodiment, a drain hole is provided in the lower part of the front plate, and a waterproof rib is provided on the rear surface of the front plate to cover the upper side of the drain hole, but the position of the hole can be changed as appropriate, and depending on the position of the hole, a waterproof rib or the like may not be provided, and the way in which the periphery of the hole is covered can also be changed as appropriate. In other words, as long as the rear side of the hole is covered by the flat part of the circuit board, a certain degree of effect can be expected. In addition, in the above embodiment, a microphone board is used as the circuit board covering the rear side of the hole, but it is also possible to use a sensor board equipped with a human presence sensor, and the design can be changed as appropriate regarding the type of circuit board on which the flat plate portion is to be provided, etc.

[0021] In addition, although the present invention is applied to a camera device in the above embodiment, the present invention can also be suitably adopted as other electrical equipment such as communication devices such as intercom master units, collective entrance units, and corridor lights. [Explanation of symbols]

[0022] 2··Camera device (electrical equipment), 10··Main body case, 11··Front case, 11a··Front plate, 14··Drainage hole (hole), 17··Waterproof rib, 18··Shielding rib, 21··Inner wall, 30··Microphone board (circuit board), 33··Flat plate portion, 40··Drainage space.

Claims

1. An electrical device having a main body case with a hole in a front panel and a circuit board installed inside the main body case, the circuit board is provided with a flat plate portion on the surface of which no electronic circuit is formed, and the circuit board is installed in the main body case so that the flat plate portion covers the rear of the hole, The electrical device is characterized in that the flat plate portion prevents water that has entered through the hole from moving backward.

2. a shielding rib protruding rearward is provided on the rear surface of the front plate, and the circuit board is installed with its front surface abutting against the tip of the shielding rib and with the flat plate portion protruding from the shielding rib to the rear side of the hole, 2. The electrical device according to claim 1, wherein the circuit board and the shielding rib prevent water that has entered through the hole from moving beyond the shielding rib.

Images