JP3407411B2 - Folding screen device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen device for projection, and more particularly to a folding screen device for displaying a projected image from a projection device.

[0002]

2. Description of the Related Art As a screen device for displaying a projected image from a projection device, a foldable screen device in which a frame supporting the screen is in a folded state when not in use, and the frame is stretched to expand the screen when in use. Has been put to practical use. As an example of a conventional folding screen device, for example, as shown in the rear view of FIG.
A pantograph-shaped frame 93 is provided on the back side of the screen 2, and when used, the pantograph-shaped frame 93 is extended upward and pulled out from a roll 91.
There is one configured to spread.

[0003]

The folding screen device illustrated in FIG. 9 is equipped with a reflective screen 92 so that the reflected light of the image projected from the front side of the screen 92 can be viewed. However, for example, there is also a desire to make the screen a transmissive type and appreciate the reflected light of the image projected from the side opposite to the projection side. However, if the screen is of a transmissive type, in the folding screen device illustrated in FIG.
Since there is a pantograph-shaped frame 93 within the projected area, the pantograph-shaped frame 93 interferes with image formation and cannot be used for transmission-type image projection.

The object of the present invention is, of course, that the folding screen device as described above can be used for projecting a reflection type image, and the frame does not exist within the projected area of the screen used for the transmission type. Then, it can also be used for transmission type image projection.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 has a screen for displaying a projected image from a projection device, a screen winding portion for winding the screen, and the screen. In a foldable screen device comprising a pair of frames that can be assembled and folded to stretch the screen from a winding portion and spread it into a use state , each of the frames includes two frames.
Connect the connecting members so that the linear members can slide on each other.
More connected and variable in length, and said frame
The two almost straight members can be bent in the middle.
It has an effective bending part, and when folded it is almost straight
The members can be aligned and bent at the bending portion, and
In the assembled state of the frame, the frame is configured so as not to be located within the projected area of the screen expanded to the use state.

[0006]

[0007]

The invention according to claim 2 is the same as claim 1.
The folding screen device is characterized in that it is provided with a bending stop member for restricting the bending portion so that it cannot be bent.

The invention according to claim 3 provides the invention according to claim 1.
Alternatively , the folding screen device according to the second aspect is characterized in that the screen, the screen winding unit, and the frame can be housed in an openable / closable case.

[0010]

According to the first aspect of the invention, in the assembled state of the frame, the frame is not located within the projected area of the screen expanded to the use state, so that the frame does not get in the way, so that the transmission type It can also be used for image projection.

Further , since the frame member is provided with a bendable portion in the middle portion and is located in a substantially straight line along both side edges of the screen which is spread in the used state in the assembled state, it is assembled. And foldable,
Moreover, it is not located within the projected area of the screen that has been expanded in use.

Further, since the two linear members are connected to each other by a connecting member so as to be slidable and the length is variable, the vertical position of the screen can be freely set.

Further , according to the second aspect of the invention, since the bent portion of the frame member is unfoldable due to the regulation of the bending stop member , it is possible to extend along the both side edges of the screen expanded in the use state. The frame member can be maintained in a substantially linear state.

According to the third aspect of the invention, since the screen, the screen winding section and the frame can be housed in the openable / closable case, it can be made compact when not in use and convenient for carrying. It can be taken out and stored with one touch.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a folding screen device according to the present invention will be described below with reference to FIGS. First,
1 to 3 show a folded screen device as an example to which the present invention is applied, in a housed state. FIG. 1 is a housed state, FIG. 2 is a housed operation (or used operation) state, and FIG. 3 is a first embodiment. The usage state concerning an example is shown, 1 is a case, 2
Is a case body, 3 is a leg, 4 is a lid, 5 is a slit, 6
Is a screen winding portion, 7 is a screen, 8 is a black screen, 9 is a horizontal bar member, 10 is a handle, 11 is a frame, 1
2 is a frame member, 13 is a bent portion, and 20 is a connecting member.

The folding screen device according to the first embodiment of the present invention is, as shown in FIG. 1, a case 1 in which a screen winding portion 6, a screen 7 and left and right frames shown in FIGS. It is a foldable storage type that can store and take out 11 and 11 with one touch. As shown in FIG. 4, the case 1 comprises a case body 2 in the shape of a horizontally elongated container and a lid body 4 attached to the long side of the case body 2 via a hinge so as to be openable and closable. 2 has left and right leg parts 3 and 3 to prevent falling.
And a slit 5 for penetrating the handle is formed in the center of the lid 4.

A screen winding section 6 is arranged in the case main body 2. The screen winding section 6 has a roll (not shown) for projecting a screen, that is, a projection (not shown). The screen 7 for displaying the projected image from the apparatus is always wound on a roll. The screen 7 is, for example, white 60
As shown in FIG. 3, a black screen 8 for blindfolding is continuously provided under the white screen 7 as shown in FIG.
The screen winding section 6 is the same as the first embodiment, except that the black screen 8 is first wound and then the white screen 7 is wound. Further, as shown in FIG. 2, a horizontal bar member 9 is integrally attached to the upper part of the screen 7, and the center of the horizontal bar member 9 is
A handle 10 is provided.

Further, the frame 11 is shown in FIGS.
As shown in FIG.
The roll and the horizontal bar member 9 on the upper part of the screen 7 are connected at both left and right ends thereof to form a pair. Moreover, each of the left and right sides of the frame 11 is composed of two front and rear frame members 12, 12 as shown in FIGS. 3 and 4, and each of the frame members 12 has a bent portion 13 in the middle thereof. It is equipped and foldable. The two front and rear frame members 12, 12 are slidably connected to each other via a connecting member 20,
As a result, the length of the frame 11 is variable.

That is, the bent portion 13 is shown in FIG.
As shown in (a) to (c), the upper and lower pipes constituting the frame member 12 are divided at an intermediate portion, and a joint 14 is provided therebetween. The joint 14 is composed of connecting pieces 15 and 15 fixed to the pipe facing ends of the frame member 12, and the connecting piece 1.
A connecting member 16 for connecting 5, 15 and the connecting member 16
A connecting pin 17, which penetrates the upper and lower parts of the
It is composed of 17 and. In this way, the coupling pieces 15 and 15 are rotatable around the coupling pins 17 and 17 in the same direction with respect to the coupling member 16, and thereby the bendable bending portion 13 is configured.

The connecting member 20 is shown in FIG.
As shown in (a) and (b), it has a fixing hole 21 and a sliding hole 22 penetrating in the vertical direction in parallel,
Furthermore, the slit 2 that opens along one side of the sliding hole 22
Have three. That is, as shown in FIGS. 3 and 4, the connecting member 20 has a fixing hole 21 bonded to the lower portion of the frame member 12 pivotally connected to the end portion of the horizontal bar member 9 above the screen 7, as shown in FIGS. It is fixed by. Further, on the outer periphery of the frame member 12 pivotally connected to the roll end portion of the screen winding portion 6 in the case body 2 as shown in FIG.
Further, as shown in FIG. 4, a sliding hole 22 having a slit 23 is slidably engaged.

Since the folding storage type screen device is constructed as described above, the left and right frames 11 are
As shown in FIG. 2, the lengths of the two front and rear frame members 12, 12 are aligned, and as shown in FIG. 2, the bent portions 13, 13 in the middle portion (the connecting pin 1 of the upper and lower connecting pieces 15, 15 with respect to the connecting member 16)
The frame members 12, 12 are folded to one side of the screen 7 by swinging about 7, 17, and the horizontal bar member 9 is superposed on the screen winding portion 6. Then, by fitting the lid body 4 on the case body 2 and performing an appropriate lock, as shown in FIG. 1, a compact state in which all parts are housed in the case 1 can be obtained. At this time, the handle 10 provided on the horizontal bar member 9 is exposed to the outside from the slit 5 of the lid body 4. Therefore, it can be carried by the handle 10 and is extremely convenient to carry.

Further, when the above folding storage type screen device is used, the case main body 2 in a state in which the left and right leg portions 3 and 3 for preventing tilting are placed at appropriate places is unlocked and the lid is closed. By opening the body 4, grasping the handle 10 and lifting the horizontal bar member 9, as shown in FIGS. 2 to 3,
The screen 7 is stretched upward from the screen winding portion 6. In this process, the frame members 12, 12 which were folded to the one surface side of the screen 7 in the stored state are changed to the bent portion 1
They rotate at 3 and 13, respectively, and eventually become almost linear. Then, by further lifting the horizontal bar member 9, sliding having the slit 23 of the connecting member 20 fixed by the fixing hole 21 at the lower part of the frame member 12 pivotally connected to the end of the horizontal bar member 9 in a rotatable manner. The hole 22 slides upward along the outer periphery of the frame member 12 pivotally connected to the roll end portion of the screen winding portion 6 so as to be rotatable,
As shown in FIG. 3, stop the sliding at an appropriate vertical position.

As described above, in the assembled state of the frame 11, the frame members 12 and 12 are linear along both side edges of the screen 7 which is expanded in the use state.
Since the frame 11 is no longer within the projected area of the screen 7, the reflective screen 7 can be used for reflective image projection, and the transmissive screen 7 can be used for transparent image projection. It can also be used for. Moreover, when using the handle 10, the handle 10 is grasped and the horizontal bar member 9 is held.
One-touch operation to lift the frame 11
Because it can be assembled, the operation is easy and convenient, and the storage operation is also easy and convenient.

Next, a second embodiment of the present invention will be described. FIG. 7 shows a second embodiment of the folding screen device as an example to which the present invention is applied, and shows the usage state thereof. In the second embodiment, the difference from the first embodiment is The arrangement of the screen winding portion 6, the black screen 8 not used, and the bending stop member 18 newly provided. Therefore, the same members or portions as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In the following description, only the points different from the first embodiment will be described in detail.

In the second embodiment, first, without using the black screen 8, as shown in FIG. 7, the screen winding portion 6 is rotatably and pivotally connected to the end portion of the horizontal bar member 9. It is provided between the lower parts of the left and right frame members 12, 12, and more specifically, it is constructed below the connecting members 20, 20. Then, in particular, each of the bent portions 13 of the frame member 12 is newly provided with a bending stop member 18 for restricting the bending so that the bending is impossible.

That is, as shown in FIGS. 8 (a) and 8 (b), the pipe-shaped bending stop member 18 is connected to the frame member 1.
The outer circumference below the second bent portion 13 is slidably fitted in advance. The bending stop member 18 is longer than the joint member 16 of the joint 14 and is located above and below the joint pieces 15, 15.
It has a pipe shape having a length overlapping with the above, and has an engaging groove 19 which is open at the upper end and penetrates the inner and outer peripheral surfaces.
The engagement groove 19 has an L-shape when viewed from the side, that is, an introduction groove portion 19a which is open at the upper end and extends downward, and a side portion which is continuous with the lower end portion of the introduction groove portion 19a (to the right in the figure). ).

On the other hand, one end (upper pin in the embodiment) of the upper and lower two pins 17, 17 of the joint 14 constituting the bent portion 13 is extended to form an engaging pin portion 17P. deep. As will be described later, the engagement pin portion 17P can be engaged with the engagement groove 19 of the bending prevention member 18 which is L-shaped in side view.

When the folding storage type screen device of the second embodiment as described above is used, in particular, the folding stop member 18 that is loosely fitted around the outer periphery of the frame member 12 below the folding portion 13 is shown in FIG. As shown by the arrow in 8 (b), the engaging pin portion 17P of the bending portion 13 is engaged with the engaging groove 19 of the bending preventing member 18 by moving it upward. That is, after engaging the introducing groove portion 19a of the engaging groove 19 with the engaging pin portion 17P, the bending preventing member 18 is moved further upward,
When the engagement pin portion 17P reaches the lower end portion of the introduction groove portion 19a, the bending stop member 18 is rotated clockwise (clockwise) to project the engagement pin portion 17P to the right end portion of the right-angled groove portion 19b. Put it on.

In this state, the bending prevention member 18
Overlaps the joint member 16 of the joint 14 of the bent portion 13 and the upper and lower joint pieces 15, 15.
Therefore, as shown in FIG. 7, all the frame members 1
2,12,12,12 are bent portions 13,13,1
Bending stop members 18, 18, 18, 1 on the outer circumferences of 3, 13
8 overlap each other and become locked,
This ensures that the assembled state is maintained in a straight line.

In the above embodiment, the frame is formed by connecting the two substantially linear members having the bent portions by the connecting members so that they can slide with respect to each other, but the present invention is not limited to this. Alternatively, for example, a frame in which pipes are connected in a nested manner in multiple stages may be used. Further, the configuration of the screen winding portion, the location of the screen winding portion, and the like are arbitrary, and it is needless to say that the specific detailed structure and the like can be appropriately changed.

[0031]

As described above, according to the folding screen device according to the first aspect of the present invention, since the frame does not exist within the projected area of the screen in the assembled state of the frame, the reflection type image projection is performed. Of course, it can also be used for transmission type image projection.

Further, by forming the frame member in a substantially linear shape along the both side edges of the screen in the assembled state, the frame can be assembled and folded by the bent portion while the frame is within the projected area of the screen. By eliminating the existence, it becomes possible to support the transmission type image projection.

Further, by forming a frame in which two substantially linear members are slidably connected to each other by a connecting member and the length is variable, the vertical position of the screen can be freely set. .

According to the second aspect of the present invention , the frame member is maintained in a substantially linear shape along both side edges of the screen by preventing the frame member from being bent by the bending stop member. become able to.

By storing the screen, the screen winding portion and the frame in the case as in the third aspect of the invention, it is possible to make the apparatus compact when not in use, which is convenient for carrying. You can remove and store with one touch.

[Brief description of drawings]

FIG. 1 is a perspective view showing a stored state of a folding screen device as an example to which the present invention is applied.

FIG. 2 is a perspective view showing a state in which a folding screen device as an example to which the present invention is applied is stored (or used).

FIG. 3 is a perspective view showing a first embodiment of a folding screen device as an example to which the present invention is applied, and showing a usage state thereof.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is an enlarged view of the bent portion of the frame,
(A) is a perspective view of a vertical state, (b) is a perspective view of a bent state, (c) is a side view of a vertical state.

FIG. 6 is an enlarged view of the connecting member of the frame,
(A) is a plan view and (b) is a perspective view.

FIG. 7 is a perspective view showing a second embodiment of the folding screen device as an example to which the present invention is applied, and showing a usage state thereof.

8A and 8B are enlarged views of a bending prevention member of the frame, FIG. 8A is a perspective view of a single product, and FIG. 8B is a perspective view illustrating how to use the member.

FIG. 9 is a rear view showing an example of a conventional folding screen device.

[Explanation of symbols]

1 case 2 Case body 3 legs 4 Lid 5 slits 6 Screen winding section 7 screen 8 black screen 9 Horizontal bar member 10 Toride 11 frames 12 frame members 13 Bend 14 joints 15 binding pieces 16 Connecting member 17 coupling pin 17P engagement pin 18 Bending stop members 19 Engagement groove 19a Introduction groove part 19b Right angle groove 20 Connection member 21 fixing holes 22 Sliding hole 23 slits

Claims (3)

(57) [Claims] 1. A screen for displaying a projected image from a projection device, a screen winding unit for winding the screen, and an assembly and folding for stretching the screen from the screen winding unit and expanding the screen to a use state.
In a foldable screen device comprising a pair of possible frames, each frame comprises two substantially straight lines.
-Shaped members are connected by connecting members so that they can slide relative to each other
And the length is variable, and the frame has two
Each of the almost linear members can be bent in the middle.
Has a barbed part that allows two linear members to be aligned when folded
The frame is configured to be bendable at the bending portion, and in the assembled state of the frame, the frame is configured so as not to be located within the projected area of the screen expanded to the use state. Foldable screen device. 2. The folding screen device according to claim 1 , further comprising a bending stop member for restricting the bending portion so that the bending portion can not be bent. 3. The folding structure according to claim 1 , wherein the screen, the screen winding portion, and the frame can be housed in an openable / closable case.
Type screen device.