JP2009198715A - Foldable screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a gap and a difference in level from being formed between two screen constituting plates, in an unfolded state as much as possible while foldably constituting a screen. <P>SOLUTION: A foldable screen includes a hinge member H configured to include a hinge shaft 18 which is parallel to the turning shaft of a screen member P, a pair of hinge wings 19 and 19 which are combined by the hinge shaft 18, and an energizing means 20 which always energizes the pair of hinge wings 19 and 19 in a direction where they are closed with respect to each other. One hinge wing 19 of the hinge member H is turnably assembled in the rear surface 3 of a first screen constituting plate 1 and the other hinge wing 19 of the hinge member H is turnably assembled in the rear surface 3' of a second screen constituting plate 1'. The unfolding of the screen member P is permitted while opening the pair of hinge wings 19 and 19 in a direction against the energization and the unfolded state is maintained by the butting of butting end surfaces 4 and 4' by the energization. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an improvement of a screen used for projecting an image or video from a projector or the like. More specifically, it has a large projection surface in a deployed state, and is half the size of a deployed state in a folded state. The present invention relates to an improvement of a screen that is easy to carry or carry.

  There is a screen in which two rectangular screen panel divided pieces having the same shape are combined in a foldable manner by a hinge attached to the back side of the joint end face. (Refer to paragraph 2 of Patent Document 1 below, see FIG. 2)

However, in such a screen, since the two screen panel split pieces are simply combined with a hinge, the screen panel split pieces folded in half are used to be flat. In some cases, a gap is easily generated between the joining end faces. When the combination accuracy of the two screen panel division pieces is low, such a gap becomes more conspicuous. Further, since the screen is folded in half on the back side when folded, the screen is likely to be damaged on the surface serving as the projection surface.
JP-A-7-306475

  The main problem to be solved by the present invention is that this type of screen is configured to be foldable from two screen component plates, while in the unfolded state, a function that does not cause a gap or a step between both screen component plates, It is in the point given appropriately to this screen, without causing complication of a structure.

In order to achieve the above object, in the present invention, the folding screen has the following configurations (1) to (4).
(1) A substantially square or rectangular first screen component plate having one surface as a projection surface and a substantially square or rectangular second screen component plate having one surface as a projection surface, the projection surfaces thereof facing each other. A screen member that is configured to be able to rotate in a folded state and an unfolded state in which the butted end surfaces in a direction orthogonal to the projection surface over one side thereof are butted together and each projection surface is positioned substantially on the same surface;
(2) A hinge shaft that is parallel to the rotation axis of the screen member, a pair of hinge blades combined by the hinge shaft, and a biasing means that constantly biases the pair of hinge blades in the closing direction. And a hinge member
(3) One hinge blade of the hinge member is rotatably assembled to the back surface of the first screen component plate, and the other hinge blade of the hinge member is rotatable to the rear surface of the second screen component plate Assembled,
(4) Deployment of the screen member is allowed while opening a pair of hinge blades in a direction against the biasing, and the unfolded state is maintained by the butting of the butted end surfaces by the biasing. .

  According to this configuration, first, the folded state in which the first and second screen constituting plates face each other in the projection surface is maintained by the bias applied to the hinge member to protect the screen from the projection surface. The state can be made compact. Then, the unfolded state in which the butted end surfaces of the first and second screen constituting plates are butted against each other can be maintained, and a gap is not generated between the butted end surfaces by the biasing force applied to the hinge member. be able to. In addition, when the folding operation is performed from the unfolded state to release the butted end surfaces, the screen member can be quickly returned to the folded state by the bias applied to the hinge member.

The first screen component plate is located on the upper end of the abutting end surface and protrudes in a direction substantially orthogonal to the abutting end surface; A lower bracket that protrudes,
The second screen component plate is located on the upper end of the abutting end surface and protrudes in a direction substantially orthogonal to the abutting end surface, and protrudes in a direction substantially orthogonal to the abutting end surface below the abutting end surface. A lower bracket and
A shaft portion is provided on one of the upper bracket of the first screen component plate and the upper bracket of the second screen component plate, and a bearing portion for receiving the shaft is provided on the other of these.
A shaft part is provided in one of the lower bracket of the first screen component plate and the lower bracket of the second screen component plate, and a bearing part for accommodating this shaft is provided in the other of these,
In addition, the shaft is positioned at or in front of the corner where the projection surface and the abutting end surface contact each other, and the bearing is configured to allow movement of the shaft in a direction parallel to the projection surface. Sometimes it is left.

  In this case, the screen member firstly spans between the folded state in which the projection surfaces of both screen constituent plates are overlapped and the unfolded state in which the projection surfaces are positioned substantially on the same plane. They are combined in a state that enables rotation about the axis. Also, secondly, the projected surfaces can be kept flat by abutting between the butted end surfaces of the two screen constituent plates in the unfolded state, and third, the two biases of the two screen constituent plates can be maintained by the urging against the hinge member in the unfolded state. It is possible to prevent a gap from being generated between the butted end surfaces.

  If the hinge wings of the hinge member are respectively provided with support legs that protrude forward when the screen member is in the deployed state, the screen members in the deployed state are continuous with the wing tips below the lower ends of the butted end surfaces. Can be stably supported in an upright state by the support legs.

An abutting portion that protrudes ahead of the abutting end surface with a front surface that is parallel to the projection surface and located on the rear side by a predetermined dimension from the projection surface;
It is on the rear side of the screen member, is parallel to the projection surface, and the pitch between the projection surface is set to the predetermined dimension, and the front surface of the contact portion is abutted from the rear in the deployed state of the screen member. A regulating means comprising a contacted surface,
While providing at least two places at intervals in the vertical direction of the screen member,
It is assumed that at least one of these restricting means has a contact portion formed on the first screen constituting plate side,
In addition, at least one of these restricting means may have a contact portion formed on the second screen constituting plate side.
In this case, it is possible to prevent the two screen constituent plates from warping backward from the developed state, and it is possible to prevent a step from being generated between the projection surfaces of the two screen constituent plates in the developed state. .

  In the screen according to the present invention, the butted end surfaces of the first and second screen constituting plates are brought into contact with each other in the unfolded state by the biasing of the hinge member, and a gap is formed between the two screen constituting plates on the projection surface side. Or a step can be prevented. Such a hinge member is composed of a pair of hinge blades and urging means combined by a hinge shaft, has a simple structure, and contributes to stable use of the screen over a long period of time.

  The best mode for carrying out the present invention will be described below with reference to FIGS.

  Here, FIG. 1 and FIG. 2 each show a folded screen, and FIG. 2 shows the screen viewed from the opposite side of FIG.

  3 and 4 show the unfolded screen, and FIG. 4 shows the screen as viewed from the back side.

  FIGS. 5 to 8 show the main part of the screen in cross section. FIG. 5 shows the folded state, FIG. 7 shows the unfolded state, and FIG. 6 shows the intermediate state between FIGS. FIG. 8 shows a state where a gap is formed between the first and second screen constituting plates 1 and 1 ′ by the action of an external force or the like from the state of FIG.

  9 and 10 show the upper side (FIG. 9) and the lower side (FIG. 10) of the hinge member H constituting the screen as viewed from the inner surface side.

  11 and 12 show the projection planes 2, 2 on the upper side 7 side (FIG. 11) and the lower side 6 side (FIG. 12), respectively, in a state where the first and second screen constituting plates 1, 1 'are separated. 'Shown from the side. In both figures, for easy viewing of the shaft 10 and the bearing 11, both screen constituent plates 1, 1 'are shown to be inclined gradually from the abutting end face 4, 4' side for convenience.

  FIG. 13 shows the upper and lower sides 7 and 7 'viewed from the back 3 and 3' when the first and second screen constituting plates 1 and 1 'are separated from each other.

  Further, FIG. 14 shows a combination portion of the combined first and second screen constituting plates 1, 1 ′ with the hinge member H omitted and viewed from the back surface 3, 3 ′ side. FIG. 16 is a cross-sectional view of the main part of FIG.

  The folding screen according to this embodiment is used for projecting an image or video from a projector or the like, and has a wide projection plane 2, 2 ′ in the unfolded state while being folded (FIGS. 1 and 2). In 2), it becomes half the size of the unfolded state (FIGS. 3 and 4), making it easy to carry or carry.

  In the illustrated example, such a screen is A4 to B4 size that fits in a business bag in a folded state, and is larger than A3 in a deployed state, and is easy to carry with a portable electronic device such as a notebook personal computer. It is like that. By constructing such a screen in this way, it is possible to project an image or video output from such a portable electronic device at a location where the projector is used for sales activities, etc., and make an easy-to-understand presentation there. .

  Such a screen is formed by combining a screen member P and a hinge member H.

  As shown in FIGS. 3 and 4, the screen member P is formed by combining two screen component plates, that is, a first screen component plate 1 and a second screen component plate 1 '.

  In the illustrated example, the first screen component plate 1 and the second screen component plate 1 ′ have front surfaces as projection surfaces 2, 2 ′, and the front surface has a substantially rectangular shape that is long in the vertical direction. It is made to constitute. Both screen constituent plates 1, 1 'are configured to have substantially the same size.

  Both screen component plates 1 and 1 'are in a folded state in which the projection surfaces 2 and 2' face each other, and a butted end surface in a direction orthogonal to the projection surfaces 2 and 2 'extending over the sides 5, 5' along the vertical direction. 4 and 4 ′ are brought into contact with each other so that the projection surfaces 2 and 2 ′ are positioned on substantially the same plane so as to be rotatable, thereby forming a screen member P.

  The abutting end surfaces 4 and 4 ′ are formed over one side 5 and 5 ′ of both sides 5 and 5 ′ along the vertical direction of the both screen constituent plates 1 and 1 ′. The surface is in the direction of the wall thickness. (Fig. 7)

  In this embodiment, the first screen constituting plate 1 includes an upper bracket 8 that protrudes in a direction substantially orthogonal to the abutting end surface 4 on the upper end 4 a of the abutting end surface 4, and the abutting end surface 4. A lower bracket 9 is provided below the lower end 4b and projecting in a direction substantially orthogonal to the butted end surface 4. Further, the second screen constituting plate 1 ′ has an upper bracket 8 ′ protruding on the upper end 4′a of the abutting end surface 4 ′ and projecting in a direction substantially orthogonal to the abutting end surface 4 ′, and the abutting end surface 4 ′. A lower bracket 9 ′ is provided below the lower end 4′b and protruding in a direction substantially orthogonal to the butted end surface 4 ′. (FIGS. 11 and 12)

A shaft 10 is provided on one of the upper bracket 8 of the first screen constituting plate 1 and the upper bracket 8 'of the second screen constituting plate 1', and a bearing portion 11 for accommodating the shaft 10 on the other is provided. As well as
A shaft 10 is provided on one of the lower bracket 9 of the first screen component plate 1 and the lower bracket 9 'of the second screen component plate 1', and a bearing portion 11 for accommodating the shaft 10 is provided on the other of them. Yes.

  In the illustrated example, a shaft 10 is provided on the upper bracket 8 and the lower bracket 9 of the first screen component plate 1 (right side in FIGS. 3, 11, and 12), and the second screen component plate 1 ′ (FIG. 3). 11 and FIG. 12, the upper bracket 8 ′ and the lower bracket 9 ′ are provided with bearings 11.

  The shaft 10 is positioned at or in front of the corner 12 (FIG. 8) where the projection surface 2 and the abutting end surface 4 contact each other. In the illustrated example, the shaft 10 is attached to the upper bracket 8 so that the axis center line is along a virtual vertical line x (FIGS. 11 and 12) passing through the corner 12 of the first screen constituting plate 1. In this case, the lower bracket 9 is provided so as to protrude downward and downward. The protruding tip 10a of the shaft 10 is positioned at substantially the same level as the upper end 4a of the butted end face 4 and at the same level as the lower end.

  On the other hand, the bearing portion 11 is configured to allow movement of the shaft 10 in a direction parallel to the projection surface 2 '. In the illustrated example, the bearing portion 11 is opened at the projecting tips of the upper bracket 8 'and the lower bracket 9' and continues to the brackets 8 ', 9' in parallel with the projection surface 2 'toward the base of these brackets. It is configured to have a split groove shape that bisects in the front-rear direction. At the same time, the shaft is positioned at the inner back portion 11a of the bearing portion 11 in a state where the butted end surfaces 4, 4 'of the both screen constituting plates 1, 1' are butted without gaps. (Fig. 7)

  Thereby, in this embodiment, the screen member P firstly has a folded state in which the projection surfaces 2 and 2 ′ of the two screen constituting plates 1 and 1 ′ are overlapped, and the projection surfaces 2 and 2 respectively. Between the unfolded state in which 'is positioned substantially on the same plane, they are combined in a state in which the shaft 10 can be rotated by 180 degrees. Secondly, the projection surfaces 2, 2 'can be kept flat by abutting between the butted end surfaces 4, 4' of the two screen constituting plates 1, 1 'in the unfolded state. By biasing the hinge member H, which will be described later, it is possible to prevent a gap from being generated between the butted end surfaces 4 and 4 ′ of the both screen constituting plates 1 and 1 ′. (Fig. 7)

In this embodiment, the front surface 13b is provided in parallel with the projection surfaces 2 and 2 'and positioned on the rear side by a predetermined dimension y from the projection surfaces 2 and 2'. A contact portion 13a protruding first;
On the back side of the screen member P, that is, on the back side 3, 3 ′ side of the screen constituting plate 1, parallel to the projection surfaces 2, 2 ′, and the pitch between the projection surfaces 2, 2 ′ is set to the predetermined value. In addition to the dimension y, the regulating means 13 including the abutted surface 13f with which the front surface 13b of the abutting portion 13a is abutted from the rear in the deployed state of the screen member P is spaced at least in the vertical direction of the screen member P. Open and provide at two or more locations (Figs. 14-16)
It is assumed that at least one of these restricting means 13 has a contact portion 13a formed on the first screen constituting plate 1 side, and at least another of these restricting means 13 is the second screen constituting plate 1. The contact portion 13a is formed on the side of '. (FIGS. 14 to 16)

  In the example shown in the drawing, both the screen constituting plates 1 and 1 ′ have their back surfaces 3 and 3 ′, respectively, and the sides 5 and 5 ′ provided with the butted end surfaces 4 and 4 ′. Are formed on the outer edge 14a side of the raised portions 14 and 14 'with a space between the adjacent contact portions 13a in the vertical direction. A contact portion 13a is formed. (FIGS. 11 to 13) At the same time, the raised portions 14 and 14 ′ are formed with notched portions 13e so as to be cut off between the adjacent contact portions 13a, and are adjacent to each other by the notched portions 13e. The contacted surface 13f is formed between the contact portions 13a. In the unfolded state, each contact portion 13a of the first screen component plate 1 enters the corresponding notched portion 13e of the second screen component plate 1 'from the rear, and its front surface 13b becomes the contact surface 13f. It comes in contact with each other. (FIGS. 13 to 15)

  Thereby, in this embodiment, the warpage of both screen constituent plates 1, 1 ′ from the developed state to the rear is along the projection planes 2, 2 ′ in the bearing portion 11 of the shaft 10. While preventing the movement in the direction, the step is prevented from generating a step between the projection surfaces 2 and 2 'of the two screen constituent plates 1 and 1' in this unfolded state. In particular, in this embodiment, the notched portion 13e of the raised portions 14, 14 'gradually brings the upper step surface 13g and the lower step surface 13h closer to each other as they move away from the butted end surfaces 4, 4'. On the other hand, the upper end surface 13c and the lower end surface 13d of the contact part 13a are provided with an inclination following the inclination, and the contact part 13a is in contact with the notched part 13e in the developed state. The upper end surface 13c is accommodated in 13g, and the lower end surface 13d is accommodated in the state where the lower step surface 13h is abutted by the biasing of the hinge member H described later. Accordingly, in the illustrated example, in such a developed state, the vertical displacement of the two screen constituting plates 1 and 1 ′ is prevented as much as possible.

  Further, in the illustrated example, both the screen constituent plates 1 and 1 ′ have sides 5 and 5 ′ and a lower side 6 along the vertical direction at positions facing one side 5 and 5 ′ with the butted end surfaces 4 and 4 ′. Skirt portions 15, 15 ′ are formed from the corners in contact with 6 ′ to the middle position of the lower sides 6, 6 ′, and a support leg 19 n of a hinge member H to be described later is a skirt portion 15. , 15 ′, and in the folded state, the lower sides 6, 6 ′ are bordered continuously to the skirt portions 15, 15 ′. (Fig. 1 and Fig. 2)

  Further, in the illustrated example, both the screen constituting plates 1 and 1 ′ are adjacent to the step portions 14b and 14′b on the opposite side of the raised portions 14 and 14 ′ on the side where the contact portions 13a are formed in the vertical direction. A plurality of projecting pieces 16... 16, 16 ′... 16 ′ are formed so as to protrude from the back surfaces 3, 3 ′ with an interval between the projecting pieces 16, 16 ′. A shaft protrusion 16a, 16'a is formed in each of the protrusions 16, 16 'in the vertical direction. (Fig. 13)

  The hinge member H includes a hinge shaft 18, a pair of hinge blades 19 and 19, and an urging means 20.

  The hinge shaft 18 has an axial center line along the vertical direction, and the axial center line is parallel to the rotation axis line (the axial center line of the shaft 10) of the combination of the two screen constituent plates 1, 1 ′. Arranged. The hinge shaft 18 is located behind the screen member P (on the back surface 3, 3 ′ side), and its axial center line is positioned on a virtual plane z including the butted end surfaces 4, 4 ′ in the unfolded state. ing. (Fig. 7)

  The pair of hinge blades 19, 19 are combined by the hinge shaft 18. Each of the hinge blades 19 and 19 has an upper end 19a positioned at substantially the same level as the upper sides 7 and 7 'of the screen component plates 1 and 1', and a lower end 19b of the lower side of the screen component plates 1 and 1 '. It is configured to have a plate shape that is longer in the vertical direction to protrude downward than 6, 6 ′. (Fig. 9, Fig. 10)

  Each of the hinge blades 19, 19 has a semi-arc cross section formed at one side edge along the length direction so that the inner side opposite to the design surface 19 c side of the hinge blade 19 is the curved inner side. A plurality of bending portions 19d are provided with an interval between adjacent bending portions 19d. An end cover portion 19e is formed at the upper and lower ends of the curved portion 19d of the hinge blade 19, and a shaft hole 19f penetrating in the vertical direction is formed in the end cover portion 19e. In the example shown in the drawing, the hinge blade 19 is inserted into the shaft hole 19f of each curved portion 19d from a state in which the other curved portion 19d fits between the curved portions 19d of the pair of hinge blades 19 and 19 without any gap. By passing the hinge shaft 18 over the length direction, the hinge blades 19 and 19 are combined so as to be rotatable on one side edge side along the length direction. (Fig. 9, Fig. 10)

  In the illustrated example, a rising portion 19g protruding inward along the side edge is formed on the other side edge along the length direction of both hinge blades 19, 19, while 19 includes a step portion 19h facing the protruding direction of the curved portion 19d formed along an imaginary straight line passing through the base portion of the curved portion 19d on the design surface 19c side. The side where the rising portion 19g is formed can be opened from the closed position (FIG. 5) where the blade tip 19i is brought close to the position where the stepped portion 19h is abutted (FIG. 7).

  The urging means 20 is configured to constantly urge the pair of hinge blades 19, 19 in the direction of closing. In the illustrated example, the urging means 20 is constituted by torsion coil springs 20 a provided one above and below the hinge member H one by one. In the illustrated example, the spring 20 a passes the hinge shaft 18 through the spring winding portion 20 b, the spring one end 20 c is fixed to the inside of one hinge blade 19, and the spring other end 20 d is connected to the inside of the other hinge blade 19. The spring winding part 20b is configured to be elastically deformed as the pair of hinge blades 19 and 19 are opened from the state where the pair of hinge blades 19 and 19 are opened. (Fig. 9, Fig. 10)

  In this embodiment, the blade tip 19i of one hinge blade 19 of the hinge member H is centered on an axis parallel to the hinge shaft 18 on the back surface 3, 3 'of the first screen constituting plate 1. And the blade tip 19i of the other hinge blade 19 of the hinge member H is mounted on the back surface 3, 3 ′ of the second screen component plate 1 ′ with an axis parallel to the hinge shaft 18 as the center. The opening of the screen member P is allowed while opening the pair of hinge blades 19 and 19 in a direction against the biasing, and the butted end surfaces 4 by the biasing are assembled. The unfolded state is maintained by 4 'butt.

  Specifically, in the illustrated example, at the blade tips 19i of the hinge blades 19 and 19, the rising portions 19g are cut off at a plurality of positions spaced apart in the vertical direction of the hinge blades 19 and the slots 19k extending laterally. A bearing portion 19j is formed by a holding piece 19m formed on the inner side of the hinge blade 19 above and below the slot 19k on the back end side of the slot 19k, and the both screens are formed in the slot 19k. By inserting the projecting pieces 16 and 16 'formed on the back surfaces 3 and 3' of the component plates 1 and 1 ', the projecting pieces are formed by the upper rising portion 19g facing the slot 19k and the upper holding piece 19m. The upper shaft projections 16a, 16'a of 16, 16 'are rotatably held, and the lower rising portion 19g facing the slot 19k and the lower holding piece 19m Lower axial projections 16a of the projecting pieces 16, 16 ', so as to hold the 16'a rotatably. In the example shown in the drawing, the uppermost protrusions 16 and 16 ′ have only the lower axial protrusions 16a and 16′a, and the lowermost protrusions 16 and 16 ′ have only the upper protrusions 16a and 16 ′. The corresponding bearing portion 19j has a holding piece 19m only on one side of the slot 19k. (Fig. 9, Fig. 10)

  In the illustrated example, in the folded state, the rotational combination side of both screen constituting plates 1 and 1 ′ is housed inside a pair of hinge blades 19 and 19 which are closed substantially in parallel (FIG. 5). While the pair of hinge blades 19 and 19 are gradually opened against the force, the rotating assembly side of both screen constituting plates 1 and 1 'is gradually pulled out forward between the pair of hinge blades 19 and 19, and the unfolded state. It can be turned up to. (FIGS. 6 to 7)

  In the screen according to this embodiment, first, the first and second screen constituting plates 1, 1 ′ are acted on the hinge member H in a folded state in which the projection surfaces 2, 2 ′ face each other. The screen can be maintained in a compact state with the projection surfaces 2 and 2 'protected. Subsequently, the unfolded state in which the butted end surfaces 4 and 4 ′ of the first and second screen constituting plates 1 and 1 ′ are butted against each other can be maintained, and the butted end surfaces can be maintained by the biasing force applied to the hinge member H. It is possible to prevent a gap from being generated between 4, 4 ′. That is, even when an external force causing a gap is applied to the butted end surfaces 4, 4 ′ of the first and second screen constituting plates 1, 1 ′ (FIG. 8), when such an external force disappears, By the urging applied to the hinge member H, the butt end surfaces 4 and 4 'are quickly returned to a state where they are butted together without any gap. (FIG. 7) Further, when the folding end surfaces 4 and 4 ′ are unmatched by performing a folding operation from the unfolded state, the screen member P is quickly returned to the folded state by the urging applied to the hinge member H. Can do.

  In this embodiment, the hinge blade 19 of the hinge member H is connected to the lower end 19b of the blade tip 19i below the lower ends 4b and 4'b of the butted end surfaces 4 and 4 ', respectively. A support leg 19n is provided that projects forward when P is in the unfolded state. In the example shown in the figure, the support leg 19n is formed in an elongated plate shape that extends straight forward from the blade tip 19i of the hinge blade 19 and is parallel to the back surface 3, 3 ′ of the screen member P in the folded state. (FIGS. 1 and 2) are positioned so as to intersect with the projection planes 2 and 2 ′ in the unfolded state. (FIGS. 3 and 4) In the illustrated example, in the unfolded state, the support legs 19n of the pair of hinge wings 19 and 19 are formed in a C shape opened forward from the hinge shaft 18 side, and the screen falls down. It comes to support so that there is not. In this embodiment, the screen member P in the unfolded state is stably supported in an upright state by the support legs 19n.

  Note that reference numerals 17 and 17 ′ denote knobs for easily opening the screen member P in the folded state.

Perspective view of screen (folded state) Perspective view of screen (folded state) Perspective view of the screen (expanded state) Perspective view of the screen (expanded state) Cross-sectional configuration diagram of the main part of the screen (folded state) Cross section of the screen Cross section of the screen Cross section of the screen Perspective perspective configuration diagram of the hinge member H Perspective perspective configuration diagram of the hinge member H The principal part perspective view of 1st and 2nd screen component board 1, 1 ' The principal part perspective view of 1st and 2nd screen component board 1, 1 ' The principal part rear view of 1st and 2nd screen component board 1, 1 ' Rear view of main part of screen member P AA line sectional view in FIG. BB sectional view in FIG.

Explanation of symbols

P screen member 1 first screen component plate 1 'second screen component plate 2, 2' projection surface 3, 3 'back surface 4, 4' butt end surface 5, 5 'one side H hinge member 18 hinge shaft 19 hinge blade 20 Energizing means

Claims (4)

A folded state in which a substantially square or rectangular first screen component plate having one surface as a projection surface and a substantially square or rectangular second screen component plate having one surface as a projection surface face each other. And a screen member that is rotatably combined over the unfolded state in which the butted end faces in the direction orthogonal to the projection plane over one side thereof are butted together and each projection plane is positioned substantially on the same plane;
A hinge comprising: a hinge shaft that is parallel to the rotational axis of the screen member; a pair of hinge blades combined by the hinge shaft; and a biasing means that constantly biases the pair of hinge blades in a closing direction. And has a member,
One hinge blade of the hinge member is pivotably assembled to the back surface of the first screen component plate, and the other hinge blade of the hinge member is pivotably assembled to the rear surface of the second screen component plate. And
Deployment of the screen member is allowed while opening a pair of hinge blades in a direction against the biasing, and the unfolded state is maintained by the butting of the butted end surfaces by the biasing. A foldable screen. The first screen component plate is on the upper end of the abutting end surface and protrudes in a direction substantially orthogonal to the abutting end surface, and protrudes in a direction substantially orthogonal to the abutting end surface under the lower end of the abutting end surface. A lower bracket and
The second screen component plate is located on the upper end of the abutting end surface and protrudes in a direction substantially orthogonal to the abutting end surface, and protrudes in a direction substantially orthogonal to the abutting end surface below the abutting end surface. A lower bracket and
A shaft portion is provided on one of the upper bracket of the first screen component plate and the upper bracket of the second screen component plate, and a bearing portion for receiving the shaft is provided on the other of these, and
A shaft part is provided on one of the lower bracket of the first screen component plate and the lower bracket of the second screen component plate, and a bearing part for receiving the shaft is provided on the other of these,
In addition, the shaft is positioned at or in front of the corner where the projection surface and the abutting end surface contact each other, and the bearing portion is configured to allow movement of the shaft in a direction parallel to the projection surface. The foldable screen according to claim 1, wherein   The hinge wings of the hinge member are each provided with a support leg that protrudes forward when the screen member is in a deployed state, continuous with the wing tip below the lower end of the butted end surface. The folding screen according to 2. A contact portion that is parallel to the projection surface and has a front surface that is positioned on the rear side by a predetermined dimension from the projection surface and protrudes ahead of the abutting end surface;
It is on the rear side of the screen member, is parallel to the projection surface, and the pitch between the projection surface is set to the predetermined dimension, and the front surface of the contact portion is abutted from the rear in the deployed state of the screen member. A regulating means comprising a contacted surface,
While providing at least two places at intervals in the vertical direction of the screen member,
At least one of these restricting means has a contact portion formed on the first screen component plate side,
4. At least one of these restricting means is such that a contact portion is formed on the second screen constituting plate side. Folding screen as described in

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