Screen device

Abstract

The utility model provides a screen device, which can prevent short circuit under the condition that a plurality of electric contacts are provided. The screen device provided by the utility model is provided with a first electric contact; a second electrical contact; a power receiving unit to which power is supplied via the first electrical contact or the second electrical contact; a screen; and a winding part for winding the screen, in which power supplied via one of the first electrical contact and the second electrical contact is not supplied to the other of the first electrical contact and the second electrical contact while power is supplied to the power receiving part via one of the first electrical contact and the second electrical contact.

Description

Technical Field

[0001] The utility model relates to a screen device. Background Art

[0002] Conventionally, a screen device is used as a projection surface on which an image is projected by an image projector such as a projector.

[0003] The screen device described in Patent Document 1 below includes a screen, a housing for housing the screen, and a motor for winding the screen within the housing. This screen device requires power to drive the motor, and thus the power is supplied from the outside via a power adapter or the like.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-177474

[0005] In order to increase the degree of configuration flexibility in the above-mentioned electric screen device, it is conceivable to provide multiple electrical contacts such as a power socket for connecting a power adapter. In the case of providing multiple electrical contacts, when one electrical contact is energized, the other electrical contacts are also energized, which may cause a short circuit. Utility Model Content

[0006] In order to solve the above-mentioned problems, a screen device of one embodiment of the present invention has: a first electrical contact; a second electrical contact; a power receiving unit, which is supplied with power via the first electrical contact or the second electrical contact; a screen; and a winding unit, which winds up the screen, and while power is supplied to the power receiving unit via one of the first electrical contact and the second electrical contact, the power supplied via the one party is not supplied to the other of the first electrical contact and the second electrical contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the main view of the screen device.

[0008] Figure 2A This is a diagram of the screen device viewed from the right side.

[0009] Figure 2B This is a diagram of the screen device viewed from the left.

[0010] Figure 2C This is a diagram showing the screen device when the screen is stored, as seen from the bottom.

[0011] Figure 3 It is a cross-sectional view showing the main structure of the weight portion.

[0012] Figure 4A It is a diagram showing the main structure of the right side of the screen device.

[0013] Figure 4B is Figure 4AThe middle picture shows the cover parts removed.

[0014] Figure 5A It is a diagram showing the main structure of the left side of the screen device.

[0015] Figure 5B is Figure 5A The middle picture shows the cover parts removed.

[0016] Figure 6 is a block diagram showing the electrical structure of a screen device.

[0017] Label Description

[0018] 10: Screen; 20: Winding part; 22: Motor; 23: Housing; 23K, 71a, 72a: Opening; 30: First power socket (first electrical contact); 40: Second power socket (second electrical contact); 50: Power receiving part; 60: Illuminating part; 70: Cover part; 80: Counterweight part; 81: Engaging part; 83: Rod-shaped body; 83K: Gap; 90: Power cable; 100: Screen device; S1: First power-on state; S2: Second power-on state; SW: Switch part. DETAILED DESCRIPTION

[0019] An embodiment of a screen device according to the present invention is described below using the accompanying drawings. In the following drawings, the scales of the dimensions of the components may differ depending on the component to facilitate visualization. The screen device according to this embodiment reflects light projected from a projection optical device such as a projector and displays it as an image on the interference side.

[0020] In the following description, the horizontal axis along the screen is referred to as the X-axis, the vertical axis along the screen is referred to as the Y-axis, and the axis along the front of the screen is referred to as the Z-axis. That is, from the observer's perspective, the left-right direction corresponds to the X-axis, the up-down direction corresponds to the Y-axis, and the depth direction corresponds to the Z-axis. Below, when describing the structure and arrangement of each component, the +X side is referred to as the "right side," the -X side is referred to as the "left side," the +Y side is referred to as the "upper side," the -Y side is referred to as the "lower side," the +Z side is referred to as the "front side," and the -Z side is referred to as the "rear side." Furthermore, the left-right direction along the X-axis is collectively referred to as the left-right direction X, and the up-down direction along the Y-axis is collectively referred to as the up-down direction Y.

[0021] Figure 1 This is a diagram showing the screen device as viewed from the front side (+Z side), which is the front side. Figure 2A This is a diagram of the screen device as viewed from the right side (+X side). Figure 2B This is a diagram of the screen device viewed from the left side (-X side). Figure 2C This is a diagram showing the screen device when the screen is stored, as viewed from the bottom side (-Y side).

[0022] As Figure 1 , Figure 2A , Figure 2B , Figure 2C indicated, the screen device 100 of the present embodiment is provided with a screen 10, a winding portion 20 that winds the screen 10, a first power outlet (first electric contact) 30, a second power outlet (second electric contact) 40, a power receiving portion 50, an illumination portion 60, a cover member 70, a counterweight portion 80, a suspension fitting 85, and a switch portion SW.

[0023] The screen 10 is used in a state of being pulled out from the winding portion 20. As Figure 1 indicated, the screen 10 is a sheet-shaped member that includes an image display region 11 and a height adjustment region 12. The image display region 11 is a region that displays projected light from a projector as an image. The height adjustment region 12 is located on the upper side (+Y side) of the image display region 11, and is a region for adjusting the height in the up-down direction Y of the image display region 11 by adjusting the amount of pull-out from the winding portion 20. Note that the height adjustment region can be composed of a material that does not transmit light, or a material that is translucent or transparent.

[0024] The rectangular screen 10 has an upper end portion 10a that is connected to the winding portion 20, and a lower end portion 10b that is opposite the upper end portion 10a. The counterweight portion 80 is provided at the lower end portion 10b of the screen 10. The counterweight portion 80 imparts a prescribed tension to the screen 10 that is pulled out from the winding portion 20, and functions as a counterweight for flattening the surface of the screen 10 in a use posture. As Figure 2C indicated, the counterweight portion 80 also functions as a cover that covers a housing opening 23K of a housing 23 described later when the screen 10 is housed in the winding portion 20. The suspension fitting 85 is provided to the housing 23, and is used when the screen device 100 is set in a suspended state from a ceiling. The screen device 100 can also be set to a wall portion by fixing a cutout 23c of the rear side (-Z side) of the housing 23 to a support pin 86 provided to the wall portion (refer to Figure 4A , Figure 4B , Figure 5A , Figure 5B ).

[0025] Figure 3 is a cross-sectional view that shows the main portion structure of the counterweight portion 80. Figure 3 is a view that shows the cross section of the counterweight portion 80 along the YZ face along the thickness direction of the screen 10.

[0026] As Figure 3As shown, the weight 80 includes an engaging member 81 fixed to the lower end 10b of the screen 10 and a rod-shaped body 83 that engages with the engaging member 81. The rod-shaped body 83 has a slit 83K through which the screen 10 is pulled out, and a locking piece 83a that engages with the engaging member 81 to lock the engaging member 81. The slit 83K is an opening extending in the left-right direction X, and the width of the slit 83K in the left-right direction X is greater than the width of the screen 10 in the left-right direction X. The engaging member 81 is composed of a first portion 81a and a second portion 81b that sandwich the screen 10 in the thickness direction.

[0027] like Figure 3 As shown, in a cross-section taken along the YZ plane in the thickness direction of the screen 10, the rod-shaped body 83 has a narrow portion 84, where the internal space narrows as it approaches the slit 83K. The thickness of the engaging member 81 on the side opposite the slit 83K (the lower side) is thinner than on the side facing the slit 83K (the upper side). The engaging member 81 hooks onto the locking piece 83a of the rod-shaped body 83, thereby securing the lower end 10b of the screen 10 to the rod-shaped body 83.

[0028] According to this structure, for example, when the lower end portion 10b of the screen 10 moves upward (+Y) relative to the rod-shaped body 83, the thicker portion of the locking part 81 contacts the inner wall surface of the narrow portion 84, thereby preventing the counterweight portion 80 from falling off from the lower end portion 10b of the screen 10.

[0029] The winding unit 20 includes a winding core 21 fixed to the upper end 10a of the screen 10; a motor 22 that rotates the winding core 21 to wind the screen 10; and a housing 23 that houses the screen 10 wound around the winding core 21. The housing 23 has an elongated shape extending in the left-right direction X. The housing 23 has a housing opening 23K for pulling out the screen 10. The screen device 100 of this embodiment is an electric screen device that uses electricity to drive the motor 22 that winds the screen 10.

[0030] The first power socket 30 and the second power socket 40 are connection ports for supplying external power to the screen device 100. Power is supplied to the first power socket 30 and the second power socket 40 via a power cable.

[0031] The first power socket 30 and the second power socket 40 are provided in the housing 23 of the winding portion 20. The first power socket 30 is provided at the right end 23a of the housing 23, which is one end. The second power socket 40 is provided at the left end 23b of the housing 23, which is the other end. With this configuration, the first power socket 30 and the second power socket 40 are provided at both ends of the housing 23, making them easily accessible. This increases the flexibility of placement of the screen device 100.

[0032] The power receiving portion 50 is supplied with electric power via the first power supply jack 30 or the second power supply jack 40. In the case of the present embodiment, the power receiving portion 50 is the motor 22 of the winding portion 20 and the lighting portion 60. The motor 22 and the lighting portion 60 are driven by electric power supplied via the first power supply jack 30 and the second power supply jack 40. The lighting portion 60 is constituted by, for example, an LED element, and functions as indirect lighting that emits illumination light toward the ceiling of a room in which the screen device 100 is installed. The configuration and structure of the lighting portion 60 are not particularly limited. The lighting portion 60 may, for example, also be driven on the basis of a battery, rather than by electric power supplied from the first power supply jack 30 or the second power supply jack 40. In this case, the lighting portion 60 is not included in the structure of the power receiving portion 50.

[0033] Figure 4A and Figure 4B is a view showing the main part structure of the right side (+X side) of the screen device. Figure 5A and Figure 5B is a view showing the main part structure of the left side (-X side) of the screen device. In Figure 4A , 4B , a state in which the power supply cable 90 is connected to the first power supply jack 30 is shown. In Figure 5A , 5B , a state in which the power supply cable 90 is connected to the second power supply jack 40 is shown. In Figure 4A and Figure 4B , Figure 5A and Figure 5B , for the sake of convenience of explanation, a state in which the power supply cable 90 is connected to both the first power supply jack 30 and the second power supply jack 40 is assumed, but the power supply cable 90 is connected to only one of the first power supply jack 30 and the second power supply jack 40. In addition, the power supply cable 90 is long, and only the portion connected to the jack is shown.

[0034] As shown in Figure 4A , 4B and Figure 5A , 5B , the cover member 70 is detachably provided to the housing 23, and covers the portion in which the first power supply jack 30 and the second power supply jack 40 are provided. The cover member 70 includes a first cover member 71 and a second cover member 72.

[0035] The first cover member 71 detachably covers the right end portion 23a of the housing 23 in which the first power outlet 30 is provided. The first cover member 71 has a first opening 71a through which the power cable 90 connected to the first power outlet 30 is inserted. Interference of the first cover member 71 with the power cable 90 can be prevented by the first opening 71a. The first cover member 71 covers the periphery of the first power outlet 30 in a state in which the power cable 90 is connected, and thus attachment of foreign matter such as dust and garbage to the connection portion of the first power outlet 30 and the power cable 90 can be suppressed.

[0036] The second cover member 72 detachably covers the left end portion 23b of the housing 23 in which the second power outlet 40 is provided. The second cover member 72 has a second opening 72a through which the power cable 90 connected to the second power outlet 40 is inserted. Interference of the second cover member 72 with the power cable 90 can be prevented by the second opening 72a. The second cover member 72 covers the periphery of the second power outlet 40 in a state in which the power cable 90 is connected, and thus attachment of foreign matter such as dust and garbage to the connection portion of the second power outlet 40 and the power cable 90 can be suppressed.

[0037] In the screen device 100 of the present embodiment, as shown in FIG. 1, a switch portion SW is provided on the upper side (+Y) of the second power outlet 40 at the left end portion 23b of the housing 23. The switch portion SW is constituted by, for example, a mechanical switch, but the structure of the switch portion SW is not particularly limited. In addition, the switch portion SW can also be provided on the first power outlet 30 side at the right end portion 23a of the housing 23. Figure 5B

[0038] Figure 6 is a block diagram showing the electrical structure of the screen device 100.

[0039] As shown in FIG. 1, the switch portion SW is electrically connected to the first power outlet 30 via a first wiring 91, electrically connected to the second power outlet 40 via a second wiring 92, and electrically connected to the power receiving portion 50 via a third wiring 93. Figure 6 The switch portion SW switches between a first power-on state S1 in which power is supplied to the power receiving portion 50 via the first power outlet 30 and a second power-on state S2 in which power is supplied to the power receiving portion 50 via the second power outlet 40. The switch portion SW can also be set to a state in which power is not supplied to the power receiving portion 50 via either one of the first power outlet 30 and the second power outlet 40 (a state shown by a solid line of FIG. 3).

[0040] Figure 6

[0041] ​​​In the screen device 100 of this embodiment, when the power cable 90 is connected to the first power outlet 30, the switch SW switches to the first power-on state S1. In the first power-on state S1, the switch SW establishes electrical continuity between the first wiring 91 and the third wiring 93, but does not establish electrical continuity between the first wiring 91 and the second wiring 92. When the power cable 90 is connected to the second power outlet 40, the screen device 100 of this embodiment switches to the second power-on state S2 via the switch SW. In the second power-on state S2, the switch SW establishes electrical continuity between the second wiring 92 and the third wiring 93, but does not establish electrical continuity between the second wiring 92 and the first wiring 91.

[0042] In the screen device 100 of this embodiment, while power is supplied to the power receiving unit 50 via one of the first power socket 30 and the second power socket 40 , the power supplied via one socket is not supplied to the other socket.

[0043] According to the screen device 100 of this embodiment, since the power outlet on the side not connected to the power cable 90 is not energized, a short circuit can be prevented from occurring in the power outlet on the side not connected to the power cable 90. The screen device 100 of this embodiment can easily switch the power outlet to the energized state by using the switch unit SW.

[0044] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0045] For example, in the screen device 100 of the above embodiment, two power sockets are provided, but three or more power sockets may be provided. In addition, the first power socket 30 and the second power socket 40 are provided at the two ends of the housing 23, but the first power socket 30 and the second power socket 40 may also be concentrated at one end.

[0046] In addition, in the screen device 100 of the above embodiment, a method of using the screen 10 by pulling it out from the upper side (+Y) to the lower side (-Y) is described, but the present invention can also be applied to a screen device that pulls the screen from the lower side (-Y) to the upper side (+Y) when it is set on the ground.

[0047] [Summary of the present disclosure]

[0048] The following is a summary of the present disclosure.

[0049] (Note 1)

[0050] A screen device, wherein the screen device comprises: a first electrical contact; a second electrical contact; a power receiving portion to which power is supplied via the first electrical contact or the second electrical contact; a screen; and a winding portion that winds up the screen, wherein while power is supplied to the power receiving portion via one of the first electrical contact and the second electrical contact, the power supplied via the one is not supplied to the other of the first electrical contact and the second electrical contact.

[0051] According to the screen device having this structure, even when one of the electrical contacts is energized, the other electrical contact is not energized, thereby preventing the other electrical contact from short-circuiting.

[0052] (Note 2)

[0053] The screen device according to Supplementary Note 1 further includes a switch portion capable of switching between a first energized state in which power is supplied to the power receiving portion via the first electrical contact and a second energized state in which power is supplied to the power receiving portion via the second electrical contact.

[0054] According to this configuration, the electrical contacts can be easily switched to an energized state by the switch portion.

[0055] (Note 3)

[0056] The screen device according to Supplementary Note 1 or Supplementary Note 2, wherein the winding unit includes a motor for winding the screen, and the power receiving unit is the motor.

[0057] According to this configuration, an electric screen can be realized in which a motor for winding the screen is driven by electricity.

[0058] (Note 4)

[0059] The screen device according to any one of Supplementary Notes 1 to 3, further comprising an illumination unit that emits illumination light.

[0060] According to this configuration, the illumination light emitted from the illumination unit can be used as indirect lighting.

[0061] (Note 5)

[0062] The screen device according to any one of Supplementary Notes 1 to 4, wherein the winding portion includes a housing for accommodating the rolled-up screen, and the first electrical contact and the second electrical contact are provided in the housing.

[0063] According to this configuration, since the electrical contacts are provided in the housing, the electrical contacts are easily accessible.

[0064] (Note 6)

[0065] The screen device according to Note 5, wherein the shell has an elongated strip shape, the first electrical contact is provided at one end of the shell, and the second electrical contact is provided at the other end of the shell.

[0066] According to this structure, since the electrical contacts are provided at both ends of the housing, the electrical contacts are easily accessible, thereby increasing the degree of freedom in the installation of the screen device.

[0067] (Note 7)

[0068] A screen device according to Note 5 or 6, wherein the screen device further comprises a cover component, wherein the cover component is detachably mounted on the shell and covers a portion where the first electrical contact and the second electrical contact are mounted, and the cover component comprises an opening for inserting a power cable connected to the first electrical contact and the second electrical contact.

[0069] According to this structure, the cover member can suppress the attachment of foreign matter such as dust and garbage to the connection portion between the power socket and the power cable. In addition, the opening can prevent interference between the cover member and the power cable.

[0070] (Note 8)

[0071] A screen device according to any one of Notes 1 to 7, wherein the screen device further includes a counterweight portion, which is provided at the end of the screen opposite to the side connected to the winding portion, and applies a specified tension to the screen when in use, the counterweight portion including: a snap-fitting part, which is fixed to the screen; and a rod-shaped body, which has a gap for pulling out the screen and is snap-fitted with the snap-fitting part, and in a cross-section in the thickness direction of the screen, the rod-shaped body has a narrow portion whose internal space narrows as it approaches the gap, and the thickness of the snap-fitting part on the side opposite to the gap is thinner than the thickness on the gap side.

[0072] According to this structure, when the lower end of the screen moves upward in the rod-shaped body, the thicker portion of the upper side of the engaging member contacts the inner wall surface of the narrow portion, which can prevent the weight from falling off from the lower end of the screen.

Claims

1. A screen device, characterized in that: have: a first electrical contact; a second electrical contact; a power receiving unit to which power is supplied via the first electrical contact or the second electrical contact; Screen; as well as a winding portion that winds the screen, While electric power is supplied to the power receiving unit via one of the first and second electrical contacts, the electric power supplied via the one contact is not supplied to the other contact.

2. The screen device according to claim 1, characterized in that The screen device further includes a switch unit capable of switching between a first energizing state in which power is supplied to the power receiving unit via the first electrical contact and a second energizing state in which power is supplied to the power receiving unit via the second electrical contact.

3. The screen device according to claim 1 or 2, characterized in that: The winding part includes a motor for winding the screen, The power receiving unit is the motor.

4. The screen device according to claim 1 or 2, characterized in that: The screen device further includes an illumination unit that emits illumination light.

5. The screen device according to claim 3, characterized in that The winding portion includes a shell, which accommodates the rolled-up screen. The first electrical contact and the second electrical contact are disposed on the housing.

6. The screen device according to claim 5, characterized in that The shell has an elongated shape. The first electrical contact is provided at one end of the housing, The second electrical contact is disposed at the other end of the housing.

7. The screen device according to claim 5, characterized in that The screen device further includes a cover member that is detachably mounted on the housing and covers a portion where the first electrical contact and the second electrical contact are mounted. The cover member has an opening through which a power cable connected to the first electrical contact and the second electrical contact is inserted.

8. The screen device according to claim 1 or 2, characterized in that: The screen device further includes a weight portion provided at an end portion of the screen opposite to the side connected to the winding portion, and applying a predetermined tension to the screen in a use posture. The weight portion includes: a snap-fitting component fixed to the screen; and a rod-shaped body having a gap for pulling out the screen and snap-fitting with the snap-fitting component. In a cross section in the thickness direction of the screen, The rod-shaped body has a narrow portion whose internal space narrows as it approaches the gap. The thickness of the engaging member on the side opposite to the slit is thinner than that on the side of the slit.

Images