JP4675651B2 - Ventilation fan - Google Patents

Description

  The present invention relates to a ventilation fan having a power connection terminal electrically connected to a fan motor.

  In a ventilation fan having a power supply connection terminal electrically connected to the fan motor, the power supply line can be connected simply by removing the coating from the power supply connection terminal (fast connection terminal). Further, there is one that can be rotated to a position where the power connection terminal can be easily inserted in order to facilitate the work of inserting the power supply line into the power connection terminal. In addition, there exists what was disclosed by patent document 1 as this kind of prior art.

JP 2000-121119 A

  In this type of conventional ventilation fan, a support pin engaging portion must be provided on the power connection terminal, and a pair of support pieces having support pins must be provided on the flange of the attachment fan. You must make a connection terminal. In addition, a protective cover may be provided to protect the connected power connection terminals from dust, but the protective cover must be attached with mounting screws and must be used with tools, such as walls and ceilings. In high places, there is a problem that it is a narrow part and difficult to work.

  The present invention has been made in order to solve the conventional problems, and the problem is that the power supply connection terminal of the normal specification is provided, and the connection work is easy and there is no part to be screwed. The object is to obtain a ventilation fan having a dust protection function for the connection part.

  In order to achieve the above-mentioned object, the present invention comprises a flange having a suction port and extending in the radial direction on the front surface of a main body in which a fan motor is attached to a wind tunnel. The ventilating fan formed in a concave shape has a power connection terminal electrically connected to the fan motor, and the power connection terminal is housed in a protective case provided in the concave part on the back of the flange. A means is adopted that has a window for presenting the connection portion of the connection terminal, is supported at both ends by the support portion so as to be rotatable on the back surface of the flange on the opposite side of the window, and can stand upright.

  By adopting the above-mentioned means, the power supply connection terminal can be connected to the connection part that stands up together with the protective case and is presented from the window. Therefore, it is possible to obtain a ventilating fan having a dust protecting function for the connecting portion without using a screwed part, which is easily connected by a power supply terminal of a normal specification.

  The ventilation fan of this invention is equipped with the main body which attached the fan motor in the wind tunnel with the attachment leg. The front surface of the main body is provided with a flange having a suction port and extending in the radial direction. The back surface of the flange is formed in a concave shape by the back surface rising formed around the flange. An electrically connected power connection terminal is connected to the fan motor, and the power connection terminal is housed in a protective case provided so as to fit in one corner of the recess on the back surface of the flange. The protective case is made of an electrically insulating plastic, has a window for presenting the connection portion of the power connection terminal, and is supported at both ends at the support portion so as to be rotatable to the flange on the opposite side of the window, You can stand up. The protective case can be rotated in a vertical plane with respect to the front surface of the flange, and in a lying state, the protective case is joined to the rear surface of the flange and is contained in the recess.

  The power connection terminal can be connected to the connection portion that stands up together with the protective case and is presented from the window. The protective case has a structure that substantially encloses the power connection terminal, and functions to protect the power connection terminal from dust.

Embodiment 1 FIG.
1 is a rear perspective view showing the ventilation fan of the present embodiment with the protective case lying down, FIG. 2 is a rear perspective view of the ventilation fan showing the protective case upright, and FIG. 3 is a protective case portion of the ventilation fan. 4 is an enlarged rear perspective view, FIG. 4 is a rear perspective view excluding the protective case portion of the ventilation fan of FIG. 3, FIG. 5 is a perspective view of the protective case, and FIG. 6 is an exploded perspective view of the protective case. FIG. 7 is a side sectional view showing the operation of the protective case.

  The ventilation fan according to the present invention includes a main body 4 in which a fan motor 1 is mounted in a wind tunnel 2 by three mounting legs 3 (see FIG. 1). A front surface of the main body 4 is provided with a flange 5 having a suction port and extending in the radial direction. The flange 5 has a back surface formed in a concave shape by a back surface rising 6 formed in the periphery. An electrically connected power connection terminal 7 is connected to the fan motor 1, and the power connection terminal 7 is accommodated in a protective case 9 provided so as to fit in one corner of the recess 8 on the back surface of the flange 5. Yes. The protective case 9 is made of an electrically insulating plastic, has a window 11 for presenting the connection portion 10 of the power supply connection terminal 7, and a support portion that is rotatable on the flange 5 on the opposite side of the window 11. 12 and 13 are supported at both ends and can stand upright (see FIGS. 1 and 2). The protective case 9 can be rotated in the range of 0 to 110 degrees in a vertical plane with respect to the front surface of the flange 5, and is joined to the rear surface of the flange in a lying state, and is accommodated in the recess 8 as shown in FIG. .

  One support portion 12 of the protective case 9 is configured as a cylindrical projecting portion, and the other support portion 13 is configured as an axial projection. A ring-shaped groove 14 is formed on the outer periphery of the cylindrical support portion 12, and the groove 14 is elastically fitted between opposing support claws 15 provided on the back surface of the flange 5. A fitting hole 16 provided on the side surface of the flange 5 is rotatably fitted. As shown in FIG. 6, the protective case 9 is divided into an element A on the rear side of the flange 5 and an element B on the inner side, and is engaged with an engaging structure 17 so as to be detachable. An electric wire electrically connecting the power connection terminal 7 and the fan motor 1 housed in the window 11 of the protective case 9 with the connecting portion 10 facing is inserted into the cylindrical support portion 12. By adopting this configuration, the torsional rigidity of the electric wire is added to the protective case 9, and the wobbling in the standing state is prevented and stabilized. In addition, the electric wire can be protected. The window 11 includes a portion 11a in which the side wall 18 of the protective case 9 is cut out with respect to the element A on the flange side, and an opening 11b of the lower cover C. A part is formed. When the protective case 9 is opened, the lower cover C is locked and fixed to the main body, and the remaining power connection terminal 7 appears on the main body side. When the protective case is closed by connecting the power supply line, the opening of the protective case is blocked and dust can be prevented from entering. In FIG. 3, only the power line lead-out opening is visible, but when it is rotated as shown in FIG. 2, the power connection terminal 7 appears.

  A rotation restricting projection 19 is formed on the inside of the rear rising edge 6 on the rotation side of the protective case 9 in the flange 5 so as to hit the protective case 9 and restrict its rotation (see FIG. 7). As a result, the rotation of the protective case 9 is restricted to about 110 degrees, and can be stably stopped at a position where connection is easy. Further, on the back surface of the flange 5 on the rotating side of the protective case 9, there is provided a holding claw 20 that can hold and release the protective case 9 by elastic deformation, so that the stability of the protective case 9 in the lying state is ensured. (See FIG. 4).

  In this ventilation fan, the power supply terminal 7 can stand together with the protective case 9 and connect the power cord to the connection portion 10 that is presented from the window 11. To do. The stability of the protective case 9 in a lying state is ensured by the holding claws 20. The protective case 9 has a structure that substantially encloses the power connection terminal 7 and fulfills a function of securely protecting the power connection terminal 7 from dust. In other words, a ventilation fan having a dust protection function for the connection portion can be obtained without using a screwed part, which is easy to connect by the power supply terminal 7 of the normal specification.

It is a back surface perspective view which shows a ventilation fan, with a protective case lying down. (Embodiment 1) It is a back perspective view of the ventilation fan which stands up and shows a protective case. (Embodiment 1) It is a back perspective view which expands and shows the protection case part of a ventilation fan. (Embodiment 1) FIG. 4 is a rear perspective view showing the ventilation fan of FIG. 3 except for a protective case portion. (Embodiment 1) It is a perspective view of a protective case. (Embodiment 1) It is a disassembled perspective view of a protective case. (Embodiment 1) It is a sectional side view which shows operation | movement of a protective case. (Embodiment 1)

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Fan motor, 4 Main body, 5 Flange, 6 Back surface rising, 7 Power supply connection terminal, 8 Recessed part, 9 Protective case, 10 Connection part, 11 Window, 12, 13 Support part, 15 Support nail, 17 Engagement structure, 19 times 20 movement control protrusions, 20 holding claws.

Claims (1)

Fan motor provided cylindrical air channel attached, a flange extending radially around the front side of the suction port of the air channel, said flange, the concave rear by rear rise formed on the outer peripheral portion Exhaust Fan der being formed is,
Having a power connection terminal electrically connected to the fan motor, the power connection terminal is housed in a protective case provided at one corner of the recess on the back of the flange;
The protective case is made of plastic with electrically insulating, having a window for exposing a connection portion of the power supply connection terminal, and is rotatably doubly supported supported at opposite sides of the window at the back of the flange It is possible to stand up ,
The protective case has a lower cover that fits into a window that exposes a connection portion of the power connection terminal to prevent dust from entering, and the lower cover is fixed to a back surface of the flange, and the protective case is Closing the window leaving a power outlet opening portion when in a lying state, opening the window when the protective case is in an upright state to expose the connection portion of the power connection terminal from the window,
A holding claw for holding the anti-rotation fulcrum side of the protective case and elastically maintaining the protective case in a lying state is provided on the back surface of the flange,
A rotation restricting means for restricting a rotation range of the protective case;
One support portion of the rotating shaft of the protective case is formed in a cylindrical shape, and the torsional rigidity of the electric wire electrically connecting the fan motor and the power supply connection terminal is not added to the protective case. So that the electric wire is inserted through the cylindrical support portion
A ventilation fan characterized by that .

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