Shutter

The shutter's battery replacement mechanism through a gap between the shutter case and curtain addresses usability and appearance issues, allowing easy indoor replacement without disrupting the shutter's aesthetics.

JP2025099425APending Publication Date: 2025-07-03SANWA SHUTTER CORP
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Patent Information

Application Number
JP2023216080
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-21
Publication Date
2025-07-03

AI Technical Summary

Technical Problem

Existing electric shutters face challenges in battery replacement due to the need to remove the shutter case material or require dedicated guide rail structures, affecting usability and appearance.

Method used

A battery arrangement structure within the shutter case allows for replacement through a gap between the shutter case's indoor lower surface and curtain, using a movable holder with a rotating mechanism for detachable battery attachment.

Benefits of technology

Enables easy battery replacement from indoors without affecting the shutter's appearance, improving maintainability and usability while maintaining the shutter's design integrity.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a shutter having a battery arrangement structure that enables a user to replace a battery despite that the battery is arranged inside a shutter case.SOLUTION: In a shutter including an opening / closing mechanism M and a battery B in a shutter case 3, the battery B is made replaceable through a gap 34a between an indoor side lower surface 33 of the shutter case 3 and a shutter curtain 5. The battery B is detachably mounted on a movable holder 8 provided on an upper side of the indoor side lower surface 33, the movable holder 8 being movable between a first posture and a second posture, and when the movable holder 8 is in the second posture, the battery B can be attached and detached through the gap 34a.SELECTED DRAWING: Figure 5
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Description

Technical Field

[0001] The present invention relates to a shutter, and more particularly to an electric shutter provided with a rechargeable battery.

Background Art

[0002] An electric shutter using solar energy is known. In such a shutter, a rechargeable battery is required to store the electricity generated by the solar panel and drive the opening / closing mechanism with the stored electricity, and this battery needs to be placed somewhere in the shutter device.

[0003] In Patent Document 1, the battery is housed in the shutter case, but since it is necessary to remove the case material when replacing the battery, it is difficult for the user to replace it by themselves. In Patent Document 2, the battery is housed in the guide rail, but it is necessary to prepare a guide rail with a dedicated structure. In Patent Document 3, a battery housing portion is externally attached to the shutter case, which affects the appearance of the shutter case.

Patent Document 1

Patent Document 2

Patent Document 3

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a shutter having a battery arrangement structure that enables battery replacement by a user while being arranged inside a shutter case.

Means for Solving the Problems

[0005] The technical means adopted by the present invention to solve such problems are In a shutter having an opening / closing mechanism and a battery inside a shutter case, the battery is replaceable through a gap between a lower surface portion of the shutter case and a shutter curtain. This is the shutter.

[0006] In one aspect, the lower surface portion consists of an outdoor side portion and an indoor side portion. The battery is provided above the indoor side portion. The gap is a gap between the indoor side portion and the shutter curtain.

[0007] In one aspect, the battery is detachably provided on a movable holder provided above the lower surface portion. The movable holder is movable between a first posture and a second posture. When the movable holder is in the second posture, the battery can be detached through the gap.

[0008] In one aspect, the movable holder includes a base fixed to the lower surface portion, and a rotating portion rotatable with respect to the base. The battery is detachably provided on the rotating portion, and the rotating portion is movable between a first posture and a second posture. In one aspect, the rotating portion has an opening for taking out the battery, and when the rotating portion is in the second posture, the opening faces downward and faces the gap. In one aspect, the rotating portion is a curved piece (arc-shaped in an embodiment described later) having a cross-sectional shape corresponding to the outer shape of the battery. In one aspect, the base is a long member extending in the width direction (opening width direction) of the shutter case, and a plurality of rotating portions are rotatably provided at intervals in the length direction of the base.

[0009] In one aspect, the movable holder includes an operation portion connected to the rotating portion. When the rotating part is in the first posture, the operating part is located in the gap, and the rotating part can be rotated from the first posture to the second posture by an operation of the operating part.

[0010] In one aspect, when the rotating part is in the first posture, the rotating part is held on the base by a detachable means. The holding is released by an operation of the operating part. In one aspect, the detachable means is a magnetic attachment means.

Advantages of the Invention

[0011] In the present invention, the battery can be replaced through the gap between the lower surface portion of the shutter case and the shutter curtain. While the battery is housed in the shutter case, the battery can be replaced without removing the case material. In particular, when the battery can be replaced through the gap between the indoor side portion of the lower surface of the shutter case and the shutter curtain, the user can replace the battery from indoors (the indoor side of the window opening), and the maintainability of the battery is improved.

[0012] In the present invention, since the battery can be housed in a normal shutter case, it does not affect the appearance of the shutter and does not impair the design of the shutter.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0014] [A] Overall Configuration of Window Shutter As shown in FIGS. 1, 3, 4, etc., the window shutter according to the present embodiment is a shutter that opens and closes the outdoor side portion of the window sash 1 provided at the window opening. Shutter cases 3 are attached to the left and right brackets 2 that are provided in a protruding manner from the building outer wall W above the window opening. In the internal space of the shutter case 3, a winding shaft (the pipe portion 4 of the winding shaft is shown) is provided so as to span between the left and right brackets 2. The upper end portion of the shutter curtain 5 is connected to the winding shaft. When the shutter is in the fully open state, the shutter curtain 5 is stored in the shutter case 3 in a state of being wound around the winding shaft.

[0015] Note that in this specification, in addition to defining one side (the left side in FIGS. 1 and 4) as the "outdoor side" and the other side (the right side in FIGS. 1 and 4) as the "indoor side" with respect to the shutter core (the vertical plane passing through the shutter curtain 5 in the fully closed posture), it should be noted that they are also used to indicate the relative position and movement direction of a certain element. For example, the gap 34a (see FIG. 2) formed between the first rising side 331 of the indoor side lower surface portion 33 and the slat 50 is formed on the "indoor side" of the slat 50 and the guide rail 60, and is formed on the "outdoor side" of the window sash 1.

[0016] Between the left and right brackets 2, upper angle members 20 and 21 and lower angle members 22 and 23 are connected, and a case framework is formed by the brackets 2 and the angle members 20 to 23 (see Fig. 1). As shown in Figs. 1, 3, and 4, the case material of the shutter case 3 is composed of an upper surface portion 30, a front portion 31, an outdoor lower surface portion 32, an indoor lower surface portion 33, and left and right side surface portions 33'. The case material is formed in a box shape from the front portion 31, the outdoor lower surface portion 32, the indoor lower surface portion 33, and the left and right side surface portions 33'. The upper surface portion 30, the outdoor lower surface portion 32, and the left and right side surface portions 33' are attached to the case framework.

[0017] In this embodiment, the indoor lower surface portion 33 of the shutter case 3 is composed of a lower surface (horizontal plane) 330, a first rising side (first vertical side) 331 on the distal end side of the lower surface 330, and a second rising side (second vertical side) 332 on the proximal end side of the lower surface 330. By fixing the second rising side 332 to the building outer wall W with screws 333, it is provided in a protruding manner on the building outer wall W (see Figs. 2 and 5).

[0018] Between the outdoor lower surface portion 32 and the indoor lower surface portion 33 of the shutter case 3, which form the lower surface of the shutter case, i.e., the lower surface portion of the shutter case 3, a space 34 through which the shutter curtain 5 passes in the vertical direction is formed across the opening width direction. The indoor side portion (the portion adjacent to the space 34) of the outdoor lower surface portion 32 forms an outer flange, and the indoor lower surface portion 33 forms an inner flange. When the shutter is opened and closed, the slats 50 of the shutter curtain 5 move up and down through the space 34 on the lower surface of the shutter case.

[0019] As shown in Fig. 3, vertical frames 6 are provided in a protruding manner on the left and right sides of the window opening of the building outer wall W, and a guide rail 60 is formed on the tip side of the vertical frame 6. The vertical frame 6 according to the present embodiment is composed of a first member (guide rail base material) connected to the building outer wall W in a protruding manner and a second member on which the guide rail 60 is formed. In the present embodiment, both ends in the width direction of the lower surface 330 of the indoor lower surface portion 33 are placed on the upper ends of the vertical frames 6 (the inner expected sides 61 of the guide rail base material) (see Figs. 3 and 6). That is, the indoor lower surface portion 33 is provided in a protruding manner on the building outer wall W by fixing the second rising side 332 to the building outer wall W with screws 333, and both ends in the width direction of the lower surface 330 are supported by the vertical frames 6.

[0020] The upper parts of the groove portions of the left and right guide rails 60 face the space 34 under the shutter case, and the upper end parts of the guide rails 60 extend upward from the width direction ends of the space 34 and are located inside the shutter case 3. A lower frame 7 is provided in a protruding manner on the building outer wall W at the lower end of the window opening, and both end parts of the lower frame 7 are connected to the lower end parts of the left and right vertical frames 6. The shutter curtain 5 of the window shutter opens and closes an opening (the outdoor side part of the window opening) formed by the lower surface of the shutter case, the left and right guide rails 60, and the lower frame 7.

[0021] The winding shaft is rotationally driven by an opening / closing machine M arranged in the shutter case 3. In the present embodiment, the opening / closing machine M is provided above the outdoor lower surface portion 32 of the shutter case 3 and at a position close to one side in the opening width direction. In the present embodiment, a lower plate 24 having an L-shaped cross section in a sectional view is connected between the left and right brackets 2 and located between the lower angle members 22 and 23, and the opening / closing machine M is attached to the lower plate 24 located above the outdoor lower surface portion 32. That is, the lower plate 24 serves as a mounting base for the opening / closing machine.

[0022] When the winding shaft is rotationally driven in the first direction with the shutter fully open, the slats 50 of the shutter curtain 5 wound around the winding shaft are fed out from the space 34 on the lower surface of the shutter case, and the both end portions in the width direction descend while being guided by the left and right guide rails 60, and the seat plate 51 at the lower end of the shutter curtain abuts against the lower frame 7 to assume a fully closed posture. When the winding shaft is rotationally driven in the second direction with the shutter fully closed, the slats 50 of the shutter curtain 5 are wound around the winding shaft to assume a fully open posture.

[0023] [B] Arrangement mode of battery In the present embodiment, the power of the opening / closing machine M is supplied from a rechargeable battery B, and the battery B stores the power obtained from the solar panel SP. The solar panel SP, the opening / closing machine M, the solar panel SP and the battery B, and the battery B and the opening / closing machine M are electrically connected by electric wires.

[0024] In the present embodiment, the battery B is provided on the lower surface 330 of the indoor-side lower surface portion 33. On the other hand, the solar panel SP is provided at a lower portion of the front portion 31 of the shutter case 3, and the opening / closing machine M is provided above the outdoor-side lower surface portion 32. The outer cable C that houses the electric wires connecting the solar panel SP and the battery B and the battery B and the opening / closing machine M is wired so as not to interfere with the raising and lowering of the slats 50 of the shutter curtain 5. Specifically, in the outer cable C, the portion that crosses between the indoor and outdoor (the portion that crosses the shutter core, which is a vertical line passing through the groove portion of the guide rail 60 in a side view) extends along the surface portion of one bracket 2 (see FIGS. 3 and 6). The positions where the solar panel SP and the opening / closing machine M are provided are not limited to the illustrated modes.

[0025] In a state where the slat 50 hangs down from the space 34 on the lower surface of the shutter case, a gap 34a is formed between the space 34 and the slat 50 on the indoor side of the slat 50 located in the space 34. This gap 34a is formed between the first rising side 331 of the indoor-side lower surface portion 33 and the slat 50, and the battery B can be exchanged from the gap 34a. In the present embodiment, the outdoor-side portion of the window sash 1 (indicated by the two-dot chain line 10 in FIGS. 2 and 5) is substantially the same as or located on the indoor side of the first rising side 331 of the indoor-side lower surface portion 33 in a side view, and does not protrude to the outdoor side (slat side) beyond the first rising side 331, and does not prevent access from the indoor side (the indoor side of the window opening) to the gap 34a.

[0026] [C]Movable holder In the present embodiment, the battery B is detachably attached to the movable holder 8, and the movable holder 8 is rotatable with respect to the base 9 fixed to the upper side of the indoor-side lower surface portion 33. The movable holder 8 and the base 9 according to the present embodiment are made of metal, but part or all of the movable holder 8 may be made of resin. The base 9 may extend over the entire length of the indoor-side lower surface portion 33, and in this case, it can also serve as a reinforcing member for the indoor-side lower surface portion 33.

[0027] As shown in FIGS. 2, 5, 7, and 8, the base 9 has an L-shaped cross section including a horizontal piece 90 and a vertical piece 91 rising from the outdoor-side end of the horizontal piece 90, and the horizontal piece 90 is fixed to the indoor-side lower surface portion (inner sill) 33. More specifically, the base 9 is fixed to the lower surface 330 of the indoor-side lower surface portion 33 with the vertical piece 91 in contact with the inside of the first rising side 331 of the indoor-side lower surface portion 33. The base 9 according to the present embodiment is a long member extending in the width direction (opening width direction) of the shutter case 3.

[0028] The movable holder 8 according to this embodiment includes a curved piece 80 that detachably holds the battery B. The number of the curved pieces 80 is not limited, but the movable holder 8 according to this embodiment includes a plurality of curved pieces 80, and each curved piece 80 is provided at intervals in the length direction of the base 9. When a plurality of curved pieces 80 are provided, the number and intervals of the curved pieces 80 can be appropriately selected according to the length dimension of the battery B held by the movable holder 8. Each curved piece 80 is arc-shaped in side view, and an opening 802 is formed between a first end 800 and a second end 801, and the first end 800 is rotatably connected to the upper end of the vertical piece 91 of the base 9. The opening 802 of the curved piece 80 forms an insertion port and a removal port for the battery B.

[0029] The battery B according to this embodiment has a cylindrical shape, and the inner diameter of the curved piece 80 is substantially the same as (or slightly smaller than) the outer diameter of the battery B. The width dimension of the opening 802 of the curved piece 80 is slightly smaller than the outer diameter of the battery B, and by expanding the curved piece 80 so as to separate the first end 800 and the second end 801, the battery B can be detachably attached. The curved piece 80 elastically deforms so that the battery B can be detached from the opening 802.

[0030] In this embodiment, a plurality of curved pieces 80 are connected to the vertical piece 91 of the base 9 at intervals in the length direction of the base 9, and a predetermined portion in the circumferential direction of each curved piece 80 is connected by a connecting bar 81. By connecting the plurality of curved pieces 80 with the connecting bar 81, the plurality of curved pieces 80 can rotate integrally. Note that when the plurality of curved pieces 80 hold the battery B, since the plurality of curved pieces 80 can rotate integrally with the battery B, the connecting bar 81 is an optional element.

[0031] An operating portion is connected to the movable holder 8, and the movable holder 8 can be rotated by an operation of grasping the operating portion. In the present embodiment, the operating portion includes a ring 82 as a grasping portion and a connecting piece 83 that connects the ring 82 and the curved piece 80. The ring 82 is connected to one curved piece 80 selected from a plurality of curved pieces 80. In the illustrated aspect, three curved pieces 80 are exemplified, and the ring 82 is connected to the second end portion 801 of the central curved piece 80 via the connecting piece 83.

[0032] The curved piece 80 of the movable holder 8 is rotatably connected to the upper end of the vertical piece 91 of the base 9 at the first end portion 800 and is rotatable between a first posture and a second posture. As shown in FIGS. 1, 2, and 7, when the curved piece 80 is in the first posture, the curved piece 80 is located on the indoor side (horizontal piece 90 side) of the vertical piece 91 of the base 9, and a portion closer to the first end portion 800 side of the curved piece 80 is in contact with the horizontal piece 90 of the base 9. The opening 802 faces upward, and the ring 82 is adjacent to the outside of the first rising side 331 at a height position facing the vertical piece 91 of the base 9. Since the curved piece 80 houses the battery B with the opening 802 facing upward, the battery B is stably held by the curved piece 80. The ring 82 is located at a position close to the first rising side 331 in the gap 34a, and in a side view, it faces the upper end portion of the guide rail 60. Therefore, when the shutter curtain 5 moves up and down, the slat 50 (constrained by the upper end portion of the guide rail 60) and the ring 82 do not interfere with each other (see FIG. 2). When the movable holder 8 is in the first posture, the ring 82 may be detachably temporarily held (for example, magnetically attached or surface-fastened) to the first rising side 331. By doing so, it is possible to prevent the generation of abnormal noise due to the ring 82 coming into contact with the first rising side 331 due to vibration.

[0033] In this embodiment, in the first posture, the connecting bar 81 abuts against the horizontal piece 90 of the base 9, and a magnet 92 is provided at a position on the horizontal piece 90 where the connecting bar 81 abuts. In this embodiment, the magnet 92 is a magnetic seal. The connecting bar 81 is a metal member having magnetism (for example, made of steel or stainless steel). When the curved piece 80 is in the first posture, the connecting bar 81 is magnetically attracted to the magnet 92, and the first posture is held by magnetic force. This magnetic attraction means is an optional element, but by holding the first posture by the magnetic attraction means, it is possible to prevent the movable holder 8 from moving due to vibration or the like, and when rotating the movable holder 8 from the second posture to the first posture, it becomes easier to take the first posture as a fixed position. In particular, since the movable holder 8 in the first posture is not visible to the operator, it is useful that the movable holder 8 can be held in the first posture (fixed position) without seeing the movable holder 8.

[0034] In addition to the base 9, a magnet may be provided on the connecting bar 81 so that the magnets are magnetically attracted to each other, or the magnet provided on the connecting bar 81 may be magnetically attracted to the horizontal piece 90 (for example, made of steel or stainless steel) of the base 9. Further, the connecting bar 81 is an optional element, and each curved piece 80 may directly abut against the horizontal piece 90 of the base 9. In the case of using a magnet in this aspect, a magnet (for example, a magnetic seal) can be provided on either one or both of the curved piece 80 and the horizontal piece 90.

[0035] In the movable holder 8 in the first posture, the ring 82 is located in the gap 34a. When the ring 82 is pulled downward, the second end portion 801 of the curved piece 80 is pulled toward the outdoor side (gap 34a side) via the connecting piece 83, and the curved piece 80 rotates away from the base 9 toward the outdoor side (gap 34a side) with the first end portion 800 as a rotation fulcrum, and becomes the second posture.

[0036] As shown in FIGS. 4, 5, and 8, when the curved piece 80 is in the second posture, the curved piece 80 is located outside and above the vertical piece 91 of the base 9, the opening 802 faces downward, the connecting piece 83 hangs down from the second end 801 of the curved piece 80, the connecting piece 83 is at a height position facing the vertical piece 91 of the base 9, and the ring 82 is located below the horizontal piece 90 of the base 9.

[0037] As shown in FIG. 5, when the curved piece 80 is in the second posture, the battery B is located above the gap 34a, and the opening 802 of the curved piece 80 is located above the gap 34a. In this state, by elastically deforming the curved piece 80 so as to widen the opening 802, the battery B can be removed.

[0038] [D] Battery replacement The replacement of the battery B is to be carried out through the gap 34a formed between the first rising side 331 of the indoor lower surface portion 33 of the shutter case 3 and the slat 50, and access to the gap 34a from the indoor side (the indoor side of the window opening) enables battery replacement. Normally, the movable holder 8 and the battery B accommodated in the movable holder 8 are in the first posture, and the ring 82 as the operation portion is adjacent to the first rising side 331 of the indoor lower surface portion 33 and is located in the gap 34a. When the opening is fully opened, the seat plate 51 at the lower end of the shutter curtain 5 is located in the gap 34a, which may narrow the effective space for detaching and attaching the battery B. Therefore, it is desirable to replace the battery B in a state where at least the shutter is not in the fully opened posture.

[0039] When accessing the gap 34a from the indoor side, grasping the ring 82 and pulling it downward, the connecting bar 81 connecting the curved piece 80 of the movable holder 8 comes off the magnet 92 on the horizontal piece 90 of the base 9, and the curved piece 80 rotates outward (towards the gap 34a) with the first end 800 as the rotation fulcrum. The connecting piece 83 connecting the ring 82 and the second end 801 of the curved piece 80 becomes vertical, and the opening 802 formed between the first end 800 and the second end 801 faces downward in the second posture, and the battery B is in a state where substantially the whole is located in the gap 34a.

[0040] Access the movable holder 8 and the battery B from the gap 34a, grasp the battery B while expanding the curved piece 80, and remove it from the opening 802 of the curved piece 80. At this time, the force pulling the ring 82 downward acts in the direction of expanding the curved piece 80 to which the ring 82 is connected. When removing the battery B, when the curved piece 80 is in the second posture, the portion of the outer cable C is pulled out into the gap 34a, and the connectors on the solar panel SP and the opening / closing machine M side and the connector on the battery B side are disconnected. Prepare a replacement battery B, hold it on the curved piece 80, and when the ring 82 is raised while holding the battery B, the second end 801 of the curved piece 80 is pushed in via the connecting piece 83, so that the curved piece 80 rotates toward the horizontal piece 90 of the base 9, and the connecting bar 81 connecting the curved pieces 80 magnetically adheres to the magnet 92 on the horizontal piece 90 to assume the first posture, and this first posture is maintained.

[0041] The curved piece 80 may be biased by a spring so as to hold the first posture, and by pulling the ring 82 as an operation part, the curved piece 80 may be rotated from the first posture to the second posture, and the curved piece 80 may be rotated from the second posture to the first posture by the biasing means. Further, the biasing means has a function similar to that of the magnetic adhesion means. In the present embodiment, the ring 82 connected to the curved piece 80 via the connecting piece 83 is shown as the operation part of the movable holder 8, but by biasing the curved piece 80 so as to hold the first posture, the operation part may be connected to the curved piece 80 via a string-like member.

[0042] In this embodiment, in a shutter having an opening / closing mechanism M and a battery B provided in a shutter case 3, the battery B can be exchanged through a gap 34a between the indoor lower surface portion 33 of the shutter case 3 and the shutter curtain 5. The battery B is detachably provided on a movable holder 8 provided above the indoor lower surface portion 33. The movable holder 8 is movable between a first posture and a second posture, and when the movable holder 8 is in the second posture, the battery B can be detached from and attached to the indoor gap 34a. Here, it is conceivable to increase the gap (outdoor gap) between the outdoor lower surface portion 32 and the shutter curtain 5 and exchange the battery B stored in the shutter case 3 from the outdoor gap. However, if the outdoor gap is large, it may affect the shutter appearance when the shutter case 3 is viewed from the outside. On the other hand, since the gap 34a located on the indoor side cannot be visually recognized from the outside, the influence on the shutter appearance is small. Further, when an operator located on the indoor side exchanges the battery B from the outdoor gap, the seat plate 51 may hinder the replacement work even when the shutter curtain 50 is in the fully open posture.

Explanation of Signs

[0043] 3 Shutter case 32 Outdoor lower surface portion (lower surface portion of shutter case, outdoor part) 33 Indoor lower surface portion (lower surface portion of shutter case, indoor part) 34a Gap 5 Shutter curtain 50 Slat 8 Movable holder 80 Curved piece (rotating part) 802 Opening 81 Connecting bar (detachable means of rotating part) 82 Ring (operating part) 83 Connecting piece (operating part) 9 Base 92 Magnet (detachable means of rotating part) B Battery M Opening / closing mechanism

Claims

1. In a shutter provided with an opening / closing mechanism and a battery inside a shutter case, the battery is replaceable through a gap between the lower surface portion of the shutter case and the shutter curtain. Shutter.

2. The lower surface portion consists of an outdoor side portion and an indoor side portion, the battery is provided above the indoor side portion, the gap is a gap between the indoor side portion and the shutter curtain. The shutter according to claim 1.

3. The battery is detachably provided on a movable holder provided above the lower surface portion, the movable holder is movable between a first posture and a second posture, when the movable holder is in the second posture, the battery is detachable through the gap. The shutter according to any one of claims 1 and 2.

4. The movable holder includes a base fixed to the lower surface portion, and a rotating portion rotatable with respect to the base, the battery is detachably provided on the rotating portion, and the rotating portion is movable between a first posture and a second posture. The shutter according to claim 3.

5. The rotating portion is provided with an opening for taking out the battery, and when the rotating portion is in the second posture, the opening faces downward and faces the gap. The shutter according to claim 4.

6. The movable holder includes an operation portion connected to the rotating portion, when the rotating portion is in the first posture, the operation portion is located in the gap, and by operating the operation portion, the rotating portion can be rotated from the first posture to the second posture. The shutter according to claim 4.

7. when the rotating portion is in the first posture, the rotating portion is held on the base by a detachable means, and the holding is released by operating the operation portion. The shutter according to claim 4.