Intercom apparatus

Abstract

To provide an intercom apparatus in which a main body case is hard to be deformed by a bent cable.SOLUTION: In an intercom master unit, a wire pressing member 20 for pressing a power supply cable 14 connected to a power supply substrate is installed in a main body case consisting of a front case and a rear case 3. On the left side plate 10b in the case part 10 of the rear case 3, a positioning slit 17 extending in a vertical direction is opened and in the wire pressing member 20, on the other hand, a positioning projection piece 22 is provided which can be inserted into the positioning slit 17. Further, regarding the shape of the positioning slit 17, the rear edge of the positioning slit 17 extends linearly in a vertical direction, while the front edge of the positioning slit 17 extends linearly in an inclination direction in which the front edge is inclined to a rear side toward an upper side, such that the longitudinal width t2 in the lower end of the positioning slit 17 becomes wider than the longitudinal width t1 in the upper end of the positioning slit 17.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an intercom device. [Background technology]

[0002] Conventionally, various circuit boards such as a power supply board and a main board for controlling communication operations between intercom devices are installed inside the main body case of an intercom device. In addition, such circuit boards may be equipped with a connector to which a cable can be connected (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-97870 A Summary of the Invention [Problem to be solved by the invention]

[0004] When connecting a cable to a connector, the portion of the cable near the connection point with the connector is sometimes given some slack and bent in order to prevent the cable from falling out of the connector when it is pulled, etc. However, when the cable is bent in this way, the elasticity of the cable can cause the main body case to deform, resulting in problems such as the creation of a gap between the front case and the rear case.

[0005] SUMMARY OF THE PRESENT DISCLOSURE ... In view of the above problems, the present invention provides an intercom device in which the main body case is less likely to be deformed by a bent cable. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides a circuit board to which a cable can be connected and a wiring pressing member for holding the cable, which are installed within a main body case, a wall portion is provided in the main body case that stands relative to the circuit board, and a positioning slit extending in a predetermined direction is opened in the wall portion, while a positioning protrusion is provided on the wiring pressing member that can be inserted into the positioning slit, and further, one of two opposing long sides in the positioning slit is inclined relative to the other long side, and the width of one end of the positioning slit in the longitudinal direction is wider than the width of the other end. Effect of the Invention

[0007] According to the present invention, a wiring pressing member for pressing the cable connected to the circuit board is installed inside the main body case, so that the elastic force of the cable is less likely to act on the main body case, and the intercom device is less likely to have the main body case deformed by the elastic force of the cable. In addition, the main body case has a wall portion that stands up against the circuit board and a positioning slit extending in a predetermined direction is opened in the wall portion, while the wiring pressing member has a positioning protrusion that can be inserted into the positioning slit, and further, one of the two opposing long sides in the positioning slit is inclined relative to the other long side, and the width of one end in the longitudinal direction of the positioning slit is wider than the width of the other end, so that the positioning protrusion can be easily inserted into the positioning slit, thereby simplifying the installation work of the wiring pressing member and, ultimately, the assembly work of the intercom equipment. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is an explanatory perspective view showing the intercom master unit from the front. [Diagram 2] FIG. 2 is an explanatory perspective view showing the intercom master unit from the rear. [Diagram 3] FIG. 13 is an explanatory diagram showing the rear case from the front with the front case removed. [Figure 4]4 is an explanatory perspective view showing the rear case in the state shown in FIG. 3 from the front. FIG. [Diagram 5] FIG. 13 is an explanatory perspective view showing an exploded state in which the wire pressing member is removed from the rear case. [Figure 6] FIG. 4 is an explanatory diagram showing the wire pressing member from the front. [Figure 7] 13 is an explanatory diagram showing an enlarged view of the power connector of the rear case from the front. FIG. [Figure 8] 13 is an explanatory diagram showing an area near the positioning slit of the rear case as viewed from the left side in an enlarged manner. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An intercom master unit according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0010] FIG. 1 is an explanatory perspective view showing the intercom master unit 1 from the front. FIG. 2 is an explanatory perspective view showing the intercom master unit 1 from the rear. FIG. 3 is an explanatory view showing the rear case 3 from the front with the front case 2 removed. FIG. 4 is an explanatory perspective view showing the rear case 3 in the state shown in FIG. 3 from the front. FIG. 5 is an explanatory perspective view showing a disassembled state with the wiring pressing member 20 removed from the rear case 3. FIG. 6 is an explanatory view showing the wiring pressing member 20 from the front. FIG. 7 is an explanatory view showing an enlarged view of the area near the power connector 13 of the rear case 3 from the front. FIG. 8 is an explanatory view showing an enlarged view of the area near the positioning slit 17 of the rear case 3 from the left side.

[0011] The intercom master unit 1 has a main body case formed by assembling a front case 2 disposed on the front side and a rear case 3 disposed on the rear side. A display unit 4 for displaying images captured by an intercom slave unit (not shown) is provided on the front side of the main body case. A call unit 5 for communicating between a resident and a visitor is provided below the display unit 4. A response button 6 operated by a resident when responding to a call from the intercom slave unit and setting buttons 7, 7 operated when making various settings are provided on the lower front side of the main body case so as to be pressable. Such an intercom master unit 1 is installed on a wall surface in a living room, and in response to a call from the intercom slave unit, an image captured by the intercom slave unit is displayed on the display unit 4, and a call with the intercom slave unit is possible by operating the response button 6.

[0012] Here, the wiring retaining structure within the main case, particularly within the rear case 3, which is a main part of the present invention, will be described. The rear case 3 comprises a case section 10 having an upper plate 10a, a left side plate 10b, a lower plate, a right side plate, and a back plate 10c, which is formed in a substantially rectangular box shape with an open front face, and brim-shaped abutment sections 11 which protrude outward in all directions from the edges of the front opening of the case section 10. The abutment section 11 is provided with four installation sections 31, 31... through which installation screws (not shown) are inserted when the rear case 3, and therefore the intercom master unit 1, is installed on a wall surface.

[0013] Meanwhile, various circuit boards, such as a main board 12 that controls the call operation with the intercom slave and a power board (not shown) on which a power connector 13 is mounted, are installed along the back plate 10c inside the case part 10. Also, a power line inlet 15 for drawing a power cable 14 into the case part 10 and a call line inlet 16 for drawing a cable (not shown) related to calls are provided on the top plate 10a of the case part 10. The power connector 13 is located below the power line inlet 15 and is exposed inside the power line inlet 15 when viewed from above. Also, the power cable 14 can be inserted and connected to the power connector 13 from below.

[0014] Furthermore, a positioning slit 17 for attaching a wiring pressing member 20, which will be described later, is provided in a portion (here, the upper portion) of the left side plate 10b (wall portion standing against the power supply board) of the case portion 10 that is adjacent to the power connector 13. The positioning slit 17 is a slit that extends in the vertical direction. However, the rear edge of the positioning slit 17 extends linearly in the vertical direction, whereas the front edge of the positioning slit 17 extends linearly in an inclined direction that inclines toward the rear as it goes upward. Therefore, the width t1 in the front-rear direction at the upper end of the positioning slit 17 is narrower than the width t2 in the front-rear direction at the lower end of the positioning slit 17. Furthermore, a power supply cover 18 is attached so as to cover the front of the power supply board, and a screw fastening portion 19 for screwing the wiring pressing member 20 is provided in a portion (here, the upper portion) of the power supply cover 18 that is adjacent to the power connector 13.

[0015] The wire pressing member 20 comprises a cover body 21 which is a generally rectangular plate when viewed from the front, a positioning protrusion 22 which protrudes leftward from the left edge of the cover body 21, and a screw-fastening boss 23 which is provided at the right end of the cover body 21, and can be screwed to the screw-fastening portion 19 of the power supply cover 18 with a fixing screw 24. The positioning protrusion 22 is a protrusion which can be inserted into the positioning slit 17, and the vertical length of the positioning protrusion 22 is approximately the same as the vertical length of the positioning slit 17, and the front-to-rear thickness of the positioning protrusion 22 is approximately the same as the front-to-rear width at the upper end of the positioning slit 17.

[0016] The installation of the intercom master unit 1 on a wall will now be described. First, the case section 10 of the rear case 3 is positioned inside the wall, and the rear surface of the abutment section 11 is abutted against the surface of the wall. Then, the rear case 3 is fixed to the wall by screwing the installation screw into the wall through the installation sections 31, 31.... Next, the power cable 14 is pulled into the case section 10 from the power line inlet 15, and the tip of the power cable 14 is inserted from below into the power connector 13 to connect it. At this time, in order to prevent the power cable 14 from coming off the power connector 13 when a load is applied to the power cable 14, for example, the power cable 14 is provided with some slack near the tip and bent into a substantially U-shape as shown in FIG. 5. That is, the power cable 14 is bent near the power connector 13.

[0017] As described above, after connecting the power cable 14 to the power connector 13, the wire pressing member 20 is attached. When attaching the wire pressing member 20, the positioning protrusion 22 is first inserted into the positioning slit 17 from inside the case part 10 to position the wire pressing member 20. At this time, since the width t2 in the front-rear direction at the lower end of the positioning slit 17 is wider than the width t1 in the front-rear direction at the upper end of the positioning slit 17, the positioning protrusion 22 can be easily inserted into the positioning slit 17. Thereafter, the fixing screw 24 is screwed from the screw fixing boss 23 into the screw fixing part 19, so that the wire pressing member 20 is attached in a state in which it covers the front of the bent part of the power cable 14 in front of the power cover 18. Then, the front case 2 side is assembled so as to cover the front of the rear case 3, and the installation of the intercom master unit 1 on the wall surface is completed.

[0018] According to the intercom master unit 1 having the above-mentioned configuration, a wiring pressing member 20 for pressing the power cable 14 connected to the power supply board is installed inside the main body case, so that the elastic force caused by bending the power cable 14 is less likely to act on the main body case, and the intercom master unit 1 is less likely to deform due to this elastic force.

[0019] In addition, a positioning slit 17 extending in the vertical direction is provided on the left side plate 10b of the case portion 10 of the rear case 3, while a positioning protrusion 22 that can be inserted into the positioning slit 17 is provided on the wire pressing member 20. Furthermore, the rear edge of the positioning slit 17 extends linearly in the vertical direction, while the front edge of the positioning slit 17 extends linearly in an inclined direction that inclines rearward as it moves upward. That is, the front edge is inclined relative to the rear edge at the front and rear edges, which are the two long sides facing each other in the positioning slit 17, and the front-to-rear width t2 at the lower end of the positioning slit 17 is wider than the front-to-rear width t1 at the upper end of the positioning slit 17. Therefore, the positioning protrusion 22 can be easily inserted into the positioning slit 17, and the installation work of the wire pressing member 20 and therefore the assembly work of the intercom master unit 1 can be simplified.

[0020] The intercom device of the present invention is not limited to the above-described embodiment, and the overall configuration of the intercom device as well as the configuration relating to the attachment of the wiring holding member, etc. can be appropriately modified as necessary without departing from the spirit of the present invention.

[0021] For example, in the above embodiment, the left side plate of the rear case is the wall in which the positioning slit is opened, but a wall for opening the positioning slit may be erected inside the main case, etc. The position of the wall, and therefore the installation position of the wiring pressing member, can also be appropriately changed in design depending on the position of the circuit board and the connection position of the cable on the circuit board, etc.

[0022] The shapes of the positioning slit and the positioning protrusion can also be appropriately changed, and there is no problem even if a positioning slit extending in the front-rear direction is provided and a plate-like positioning protrusion that is long in the front-rear direction is provided. Furthermore, the design can also be appropriately changed as to which end in the longitudinal direction of the positioning slit is made wider and which long side is inclined relative to which long side. For example, for a positioning slit extending in the vertical direction as described in the embodiment, there is no problem even if a positioning slit is provided in which both the front and rear edges extend in an inclined direction, that is, the front edge extends in the same inclined direction as the embodiment, while the rear edge extends in an inclined direction that inclines toward the front as it goes upward.

[0023] Furthermore, in the above embodiment, a wiring pressing member is installed to hold down the power cable, but there is no problem if a wiring pressing member is installed to hold down the cable connected to the connector provided on the main board, and a positioning slit and positioning protrusion as described in the embodiment are provided as a configuration related to the installation of the wiring pressing member.

[0024] In addition, in the above embodiment, an intercom master unit is described as an example of an intercom device, but the present invention can also be suitably adopted for other intercom devices such as an intercom slave unit or a collective entrance unit. [Explanation of symbols]

[0025] 1··Intercom parent unit (intercom device), 2··Front case (main body case), 3··Rear case (main body case), 10··Case portion, 10b··Left side panel (wall portion), 13··Power connector, 14··Power cable, 17··Positioning slit, 20··Wiring holding member, 22··Positioning protrusion.

Claims

[Claim 1] A circuit board to which a cable can be connected and a wire pressing member for pressing the cable are provided in the main body case, the main body case is provided with a wall portion standing on the circuit board, the wall portion is provided with a positioning slit extending in a predetermined direction, and the wire pressing member is provided with a positioning protrusion that can be inserted into the positioning slit, Furthermore, this intercom device is characterized in that one of the two opposing long side portions in the positioning slit is inclined with respect to the other long side portion, and the width of one end portion in the longitudinal direction of the positioning slit is wider than the width of the other end portion.

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