JP7705748B2 - Winding drive unit - Google Patents

Description

This disclosure relates to a winding drive device.

Conventionally, there is known an electric opening/closing device that opens and closes an opening in a building by rolling up a curtain material such as a shutter or screen that covers the opening (see, for example, Patent Document 1). The electric opening/closing device is connected to a commercial power source and is grounded.

JP 2020-84643 A

When retrofitting an electric opening/closing device during renovation, changing from manual to electric, or replacing an old electric opening/closing device with a new one, it may be necessary to connect the power line and install an earth wire.

The present disclosure relates to a winding drive device for an electric opening/closing body device, the winding drive device comprising a metal case that houses a motor and a circuit board that is disposed within the case, the charging section of the circuit board being disposed away from the case, and the circuit board being covered with an insulating sheet.

1 is a diagram showing an electric opening/closing body device according to a first embodiment; FIG. 2 is a development view of the winding drive device of the first embodiment. FIG. 2 is a schematic side view of the winding drive device of the first embodiment. FIG. 2 is a schematic diagram of the winding drive device of the first embodiment as viewed from below. FIG. 11 is a development view of a winding drive device according to a second embodiment.

Embodiments of the present disclosure will be described in detail below with reference to the drawings. The electric opening/closing body device 100 is, for example, an electric shutter. The electric opening/closing body device 100 is disposed in an opening 200 of a building in which a window or the like is provided. The electric opening/closing body device 100 has a frame portion 110, a shutter box 120, a slat curtain 130, a winding shaft portion 140, and a winding drive device 1.

The frame 110 is arranged along the periphery of the opening 200 and fixed to the exterior wall surface of the building. The shutter box 120 is arranged above the frame 110 along the width direction. The shutter box 120 is formed with a hollow interior. The slat curtain 130 is a planar material that can be opened and closed outside the opening 200. The slat curtain 130 is wound up in a roll and is configured to close the opening 200 by hanging down. The slat curtain 130 is stored inside the shutter box 120 in its rolled up state.

The winding shaft 140 is a hollow, elongated cylinder that extends from one end of the shutter box 120 to the other. An end of the slat curtain 130 is fixed to the outside of the winding shaft 140. As the winding shaft 140 rotates, the slat curtain 130 is wound up or hung from the winding shaft 140. A winding drive device 1, which will be described later, is disposed on one side of the end inside the winding shaft 140. A spring set 141 is disposed on the other side inside the winding shaft 140.

The winding drive device 1 is fixed to the winding shaft portion 140 and rotates the winding shaft portion 140. As shown in Figures 2 and 3, the winding drive device 1 has a case 2, a motor 3, a substrate 4, an insulating sheet 5, and a fixing means 6.

The case 2 is a substantially cylindrical member that forms the outer shape of the winding drive device 1. The case 2 has an upper case 21 and a lower case 22. The upper case 21 and the lower case 22 are each horizontally elongated members that are substantially semicircular in cross section and extend along the axial direction of the winding shaft portion 140. The upper case 21 and the lower case 22 are connected to each other to form a cylindrical shape. The case 2 has sufficient strength to rotate the winding shaft portion 140 to which the slat curtain 130 is connected, and is made of metal.

The motor 3 rotates using electricity to drive the winding drive device 1. The motor 3 is housed inside the lower case 22. The motor 3 is connected to the gear 31 and is located at one end of the case 2.

The board 4 is a control board that controls the winding drive device 1 to open and close the slat curtain 130 in response to a user's instruction via a remote controller (not shown). The board 4 is disposed within the lower case 22. The board 4 is supported by a support member 61 of the fixing means 6 (described below) and is covered by an insulating sheet 5. A harness 43 that is connected to various devices is connected to the board 4. The board 4 has a board main body portion 41 and a charging portion 42.

The board body 41 is a thin insulating plate and a non-charging part made of synthetic resin. The board body 41 has a roughly rectangular shape and is arranged with its longitudinal direction aligned with the longitudinal direction of the case 2. The board body 41 forms the outer shape of the board 4.

The charging unit 42 is a conductive part to which electricity is applied during normal use, and includes conductive wiring arranged on the board main body 41 and metal parts to which electronic components are soldered. As shown in FIG. 3, the charging unit 42 has legs 421 that protrude downward from the lower surface of the board main body 41. The legs 421 are part of the soldered metal parts. As shown in FIG. 3, the charging unit 42 is arranged at a predetermined distance D from the case 2. More specifically, the lower end of the legs 421 of the charging unit 42 is arranged at least 2.5 mm away from the lower case 22. By separating the charging unit 42 by 2.5 mm or more from the lower case 22, the metallic case 2 and the charging unit 42 are insulated.

The insulating sheet 5 is made of a non-conductive material and is a flexible thin plate material. The insulating sheet 5 is formed into a cylindrical shape having an outer diameter that allows insertion into the case 2. The insulating sheet 5 covers the board 4 by arranging the board 4 inside the cylindrical shape, and also covers the harness 43 and transformer 7 arranged on the board 4, the motor 3 arranged adjacent to the board 4, etc. The insulating sheet 5 also covers the support member 61 of the fixing means 6 described later together with the board 4. In other words, the board 4, the motor 3, the support member 61, etc. are arranged inside the cylinder formed by the insulating sheet 5. Since the insulating sheet 5 covers the board 4, the board 4 and the case 2 are additionally insulated. As shown in FIG. 2, the insulating sheet 5 has a partially cut-out opening 51 formed therein. The insulating sheet 5 may be made of, for example, polypropylene or polycarbonate.

The fixing means 6 is a member that fixes the case 2 and the substrate 4. The fixing means 6 is made of an insulating material and has a support member 61 and a screw 62.

As shown in FIG. 2, the support member 61 is composed of a thin, vertically elongated plate that is aligned with the longitudinal direction of the substrate 4. The support member 61 has a support member main body 611, a case abutment portion 612, and a support protrusion 613. The support member 61 is made of resin, specifically, plastic.

The support member main body 611 has a generally rectangular shape in a plan view and is disposed below the board main body 41. A portion of the support member main body 611 is cut out so as not to interfere with the legs 421 of the charging unit 42 that protrude from the underside of the board main body 41.

As shown in FIG. 4, the case abutment portions 612 are arranged on both longitudinal ends and approximately the longitudinal center of the support member main body portion 611 on the back surface opposite the side on which the substrate 4 is arranged. The case abutment portions 612 are arc-shaped portions with curved lower surfaces that fit along the semicircular curved portion of the lower case 22. The width of the case abutment portions 612 is wider than the width of the support member main body portion 611, and protrude from both widthwise ends of the support member main body portion 611.

The support protrusion 613 is a protrusion that protrudes upward from the end of the case abutment portion 612. The support protrusion 613 supports the underside of the board body portion 41. The support protrusion 613 is connected to and fixed to the board body portion 41. The support protrusion 613 supports the board body portion 41, forming a gap G between the board body portion 41 and the support member body portion 611. The leg portion 421 of the charging portion 42 protrudes from the board body portion 41 and is disposed in this gap G. This prevents the leg portion 421 of the charging portion 42 from coming into direct contact with the support member body portion 611. When the length of the leg portion 421 protruding from the charging portion 42 varies depending on the location, the board body portion 41 does not tilt, and the distance between the board body portion 41 and the support member 61 is maintained constant.

The screw 62 is a resin screw that secures the case 2 and the support member 61. The screw 62 penetrates and secures the case 2, the insulating sheet 5, and the support member 61. Since the support member 61 is connected and fixed to the board 4, the case 2 and the support member 61 are connected and fixed by the screw 62, and therefore the board 4 and the case 2 are connected and fixed via the insulating sheet 5.

According to the first embodiment, the following effects are achieved. The winding drive device 1 of the electric opening/closing body device 100 includes a metal case 2 that houses the motor 3 and a board 4 that is placed inside the case 2. The charging unit 42 on the board 4 is placed a predetermined distance D away from the case 2, and the board 4 is covered with an insulating sheet 5. The charging unit 42 is placed a predetermined distance D away from the case 2, and the board 4 is covered with an insulating sheet 5, so that the board 4 is doubly insulated from the case 2. The winding drive device 1 has a double insulation structure. This eliminates the need for the winding drive device 1 to install an earth wire as specified by the Electrical Appliance and Material Safety Law. This makes it easier to install the winding drive device 1. In particular, this improves the ease of installation when installing an electric opening/closing body device as a retrofit, such as during renovation.

According to the first embodiment, the case 2 and the substrate 4, which are arranged at a predetermined distance apart, are connected by an insulating fixing means 6 via an insulating sheet 5. This ensures that the metallic case 2 and the live part 42 of the substrate 4 are more reliably insulated.

According to the first embodiment, the fixing means 6 is configured to include a resin support member 61 that supports the underside of the substrate 4, and the support member 61 is connected to the case 2. Since the fixing means 6 has the resin support member 61 that supports the underside of the substrate 4, the substrate 4 is stably held within the case 2. At the same time, since the support member 61 is positioned between the case 2 and the substrate 4, a more reliable and safe insulation structure is obtained.

According to the first embodiment, a gap G is formed between the support member 61 and the substrate 4, and a part of the charging part 42 protrudes from the substrate 4 and is disposed in the gap G. As a result, even if a part of the charging part 42 extends toward the support member 61 below the substrate 4, it will not be connected to the case 2. This provides a more reliable and safer insulation structure.

This disclosure is not limited to the above-described embodiment, and includes modifications, improvements, etc., within the scope of achieving the object of this disclosure. In the first embodiment, the case 2 and the board 4 are connected by fixing a resin support member 61 with a resin screw 62. By making the screw 62 from resin, a reliable insulating structure can be obtained. However, the support member 61 may also be fixed with a metal screw. A metal screw allows for a strong fastening and improves durability.

In the second embodiment shown in FIG. 5, the insulating fixing means in the winding drive device 1A has a resin screw 62A as an insulating fastener. The resin screw 62A directly fixes the case 2 and the substrate 4 covered with the insulating sheet 5 without using the support member 61.

The board body 41 of the board 4 has through holes 44 for fixing the screws 62A. The through holes 44 are arranged diagonally near the corners of the board body 41. The lower case 22 has an attachment section 221 in which a through hole 221a for fixing the screws 62A is formed. The attachment section 221 is configured as a protrusion protruding upward from the lower surface of the lower case 22 at a position corresponding to the through hole 44 of the board body 41 in the lower case 22, and has a flat upper surface. The through hole 221a of the attachment section 221 is formed in the flat upper surface of the attachment section 221.

The screw 62A passes through the through hole 44 of the board main body 41 and the through hole 221a in the mounting portion 221 of the lower case 22 to fix the board 4 and the lower case 22. The board 4 is covered with an insulating sheet 5, and the case 2 and the board 4 are arranged at a predetermined distance D from each other. Therefore, the live part 42 of the board 4 is insulated from the lower case 22 simply by fixing the board 4 and the lower case 22 with the screw 62A without using the support member 61.

The fixing device is exemplified as a resin screw 62A, but is not limited to a screw. A pin or the like may be used as long as it can fix the case 2 and the substrate 4. The fixing device may penetrate the support member 61 to fix the case 2 and the substrate 4.

In the above embodiment, an example has been described in which the winding drive device 1 is provided in the electric opening/closing body device 100, which is an electric shutter. The winding drive device 1 may also be provided in a roller blind, and there is no limitation on the type of electric opening/closing body device or curtain material.

REFERENCE SIGNS LIST 1 Winding drive device, 2 Case, 3 Motor, 4 Board, 5 Insulating sheet (sheet), 6 Fixing means, 42 Charging section, 61 Support member, 62 Screw (fixing tool), 100 Electric opening/closing body device

Claims (5)

A winding drive device for an electric opening/closing body device,
A metal case that houses the motor;
A substrate disposed within the case;
an insulating sheet disposed in the case and formed into a cylindrical shape ;
The charging portion of the board is disposed away from the case,
A take-up drive device, wherein the substrate is disposed within the sheet and covered by the sheet . The winding drive device according to claim 1, wherein the case and the substrate are connected via the sheet by an insulating fixing means. the fixing means has a resin support member that supports a lower side of the substrate,
The winding drive of claim 2 , wherein the support member is connected to the case. A gap is formed between the support member and the substrate,
The winding drive device according to claim 3 , wherein a portion of the charging portion protrudes from the board and is disposed in the gap. The fixing means includes a fixing tool,
The winding drive device according to any one of claims 2 to 4, wherein the substrate and the sheet are fixed together by the fixing device.

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