CN215117156U - Projection screen - Google Patents
Projection screen Download PDFInfo
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- CN215117156U CN215117156U CN202121476335.2U CN202121476335U CN215117156U CN 215117156 U CN215117156 U CN 215117156U CN 202121476335 U CN202121476335 U CN 202121476335U CN 215117156 U CN215117156 U CN 215117156U
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- connecting rod
- lower frame
- projection screen
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- upper frame
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Abstract
The embodiment of the application discloses a projection screen, and belongs to the technical field of projection. The projection screen includes: the frame comprises an upper frame, a lower frame and a connecting rod, wherein the first end of the connecting rod is connected with the upper frame, the second end of the connecting rod is connected with the lower frame, and the distance between the lower frame and the upper frame is adjustable; and the first side edge and the second side edge which are opposite to each other on the curtain sheet are respectively fixedly connected with the upper frame and the lower frame. In the embodiment of this application, because the distance between last frame and the lower frame is adjustable to at the fixed back of last frame, can adjust the position of lower frame, realize the take-up of curtain piece, make the curtain piece be in the state of expanding, and guarantee the roughness after the curtain piece expandes. Therefore, the structure of the projection screen is simplified, the cost and the weight of the projection screen are reduced, and the assembly efficiency of the projection screen is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of projection, in particular to a projection screen.
Background
With the continuous development of science and technology, projection equipment is more and more applied to the work and the life of people. At present, a projection device mainly includes a laser projection host and a projection screen, where a light outlet of the laser projection host faces the projection screen to emit a light beam to the projection screen, and the projection screen is used to receive the light beam to realize display of a picture.
In the related art, as shown in fig. 1, the projection screen includes four frames 1, a plurality of connecting rods 2 and a curtain sheet 3, the four frames 1 form a frame, two ends of each connecting rod 2 in the plurality of connecting rods 2 are respectively connected to the upper frame and the lower frame, the curtain sheet 3 is attached to a first side of the frame, and a periphery of the curtain sheet 3 is fixed to a second side of the frame. However, due to the assembly of the plurality of link bars 2, not only the weight of the projection screen is increased, but also the assembly process of the projection screen is increased.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a projection screen, which can simplify the structure of the projection screen so as to reduce the cost and the weight of the projection screen. The technical scheme is as follows:
a projection screen, comprising:
the frame comprises an upper frame, a lower frame and a connecting rod, wherein the first end of the connecting rod is connected with the upper frame, the second end of the connecting rod is connected with the lower frame, and the distance between the lower frame and the upper frame is adjustable;
and the first side edge and the second side edge which are opposite to each other on the curtain sheet are respectively fixedly connected with the upper frame and the lower frame.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
in the embodiment of this application, because the distance between the upper and lower frame is adjustable to at the fixed back of upper frame, can adjust the position of lower frame, realize the take-up of curtain piece, make the curtain piece be in the state of expanding, and guarantee the roughness after the curtain piece expandes. Therefore, under the condition of ensuring the normal use of the screen, the structure of the projection screen is simplified, the cost and the weight of the projection screen are reduced, and the assembly efficiency of the projection screen is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a projection screen provided in the related art;
fig. 2 is a schematic structural diagram of a projection screen provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a projection screen according to an embodiment of the present disclosure;
fig. 4 is an exploded view of a projection screen according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a projection screen provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a projection screen according to an embodiment of the present disclosure;
FIG. 7 is a schematic structural view of a take-up assembly provided by an embodiment of the present application;
fig. 8 is an exploded view of a tensioning assembly according to an embodiment of the present disclosure.
Reference numerals:
the related technology comprises the following steps:
1: a frame; 2: a connecting rod; 3: a screen sheet;
the embodiment of the application:
1: a frame; 2: a screen sheet; 3: a connecting member; 4: a gland; 5: a first fixing member; 6: a tension assembly; 7: a hanger;
11: an upper frame; 12: a lower frame; 13: a connecting rod; 14: angle iron;
131: a chute;
61: a first magnet; 62: a second magnet; 63: and a second fixing member.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Fig. 2 illustrates a schematic structural diagram of a projection screen according to an embodiment of the present application. As shown in fig. 2, the projection screen includes: the frame comprises a frame 1, wherein the frame 1 comprises an upper frame 11, a lower frame 12 and a connecting rod 13, the first end of the connecting rod 13 is connected with the upper frame 11, the second end of the connecting rod 13 is connected with the lower frame 12, and the distance between the lower frame 12 and the upper frame 11 is adjustable; the curtain sheet 2, the first side and the second side opposite to each other on the curtain sheet 2 are respectively and fixedly connected with the upper frame 11 and the lower frame 12.
In the embodiment of this application, because the distance between the upper and lower frame 12 is adjustable to at the fixed back of upper frame 11, can adjust the position of lower frame 12, realize the take-up of curtain piece 2, make curtain piece 2 be in the state of expanding, and guarantee the roughness after curtain piece 2 expandes. Therefore, under the condition that the curtain sheet 2 is normally used, compared with the related art, the structure of the projection screen is simplified, the cost and the weight of the projection screen are reduced, and the assembling efficiency of the projection screen is improved.
In the embodiment of the present application, the number of the connecting rods 13 can be set as required.
When the number of the connecting rods 13 is 1, the two ends of the connecting rods 13 are respectively connected to the midpoint position of the upper frame 11 and the midpoint position of the lower frame 12, so that the stability of connection between the upper frame 11 and the lower frame 12 is ensured, and the possibility of distortion of the curtain sheet 2 is avoided.
When the number of the connecting rods 13 is plural, the connecting rods 13 are uniformly distributed along the length direction of the upper frame 11, that is, two ends of the connecting rods 13 are respectively connected to the position corresponding to the equal division point on the upper frame 11 and the position corresponding to the equal division point on the lower frame 12. The position of the bisector point is a plurality of bisector point positions obtained by equally dividing the upper frame 11 and the lower frame 12 by the sum of 1 of the number of the connecting rods 13, and the plurality of bisector point positions correspond to the plurality of connecting rods 13 one to one.
Of course, besides being uniformly distributed, the plurality of connecting rods 13 can also be distributed along the length direction of the upper frame 11 according to requirements. Illustratively, as shown in fig. 2, the number of the connecting rods 13 is 2, both ends of a first connecting rod 13 of the two connecting rods 13 are connected to one end of the upper frame 11 and one end of the lower frame 12, respectively, and both ends of a second connecting rod 13 of the two connecting rods 13 are connected to the other end of the upper frame 11 and the other end of the lower frame 12, respectively. I.e. two connecting bars 13 as the left and right frame of the projection screen.
In this application embodiment, the first side of curtain piece 2 and last frame 11 adhesive bonding are fixed, and the second side that is relative with first side on the curtain piece and lower frame 12 adhesive bonding are fixed. Of course, the first side edge and the second side edge of the curtain sheet 2 may be fixed to the upper frame 11 and the lower frame 12 in other manners. Illustratively, the first side edge and the second side edge of the curtain sheet 2 are folded and wrapped around the upper frame 11 and the lower frame 12, and then fixed to the back sides of the upper frame 11 and the lower frame 12. The back sides of the upper frame 11 and the lower frame 12 refer to the sides away from the laser projection host. Or, the second side edge of the screen 2 has a holding pocket, the projection screen further includes a pull rod and a tension member, the pull rod is located in the holding pocket, one end of the tension member is fixedly connected with the pull rod, and the other end of the tension member is fixed at the back side of the lower frame 12. Like this, can be through the taut pull rod of tensioning piece, realize the taut to the second side of curtain 2 to realize the fixed of the second side of curtain 2.
In the embodiment of the present application, when the distance between the upper frame 11 and the lower frame 12 is adjusted, the first condition is to adjust the distance between the lower frame 12 and the connecting rod 13, so as to adjust the distance between the upper frame 11 and the lower frame 12; the second situation is that the distance between the upper frame 11 and the connecting rod 13 is adjusted to realize the adjustment of the distance between the upper frame 11 and the lower frame 12; the third case is to adjust the length of the connecting rod 13 to adjust the distance between the upper frame 11 and the lower frame 12.
When the distance between the upper frame 11 and the lower frame 12 is adjusted, as an example in the first case, the lower frame 12 and the connecting rod 13 may be slidably connected in the longitudinal direction of the connecting rod 13, so that the distance between the lower frame 12 and the connecting rod 13 is adjusted by the relative sliding between the lower frame 12 and the connecting rod 13; or the lower frame 12 and the connecting rod 13 are elastically connected by an elastic connecting member, so that the distance between the lower frame 12 and the connecting rod 13 is adjusted by the elastic force of the elastic connecting member. Of course, the distance between the lower frame 12 and the connecting rod 13 may also be adjusted in other manners, or the distance between the lower frame 12 and the connecting rod 13 may be adjusted in various manners, which is not limited in the embodiment of the present application.
The above three cases will be explained in detail by taking the sliding connection as an example.
In the first case, the first end of the connecting rod 13 is fixedly connected to the upper frame 11, and the second end of the connecting rod 13 is slidably connected to the lower frame 12 in the longitudinal direction of the connecting rod 13. Thus, the distance between the upper frame 11 and the lower frame 12 can be adjusted by adjusting the relative sliding distance between the lower frame 12 and the connecting rod 13.
As shown in fig. 3, a first end of the connecting rod 13 is fixedly connected to the upper frame 11 through an angle iron 14. Of course, the first end of the connecting rod 13 and the upper frame 11 may also be fixedly connected in other manners, for example, the first end and the upper frame are fixedly connected by a fixing screw, which is not limited in this embodiment of the application.
When the lower frame 12 and the connecting member 3 slide relatively, the lower frame 12 is connected to the upper frame 11 through the curtain sheet 2, so that the curtain sheet 2 defines the maximum relative sliding distance between the lower frame 12 and the connecting member 3. Therefore, in the width direction of the curtain sheet 2, the lower side frame 12 and the connecting rod 13 are inserted in a sliding manner in the length direction of the connecting rod 13, and the sum of the insertion depth and the length of the connecting rod 13 is greater than the maximum distance between the lower side frame 12 and the upper side frame 11, so that the lower side frame 12 and the connecting rod 13 can slip relatively.
In some embodiments, as shown in fig. 4, the projection screen further includes a connecting member 3, the connecting member 3 is fixedly connected to the lower frame 12, and the connecting member 3 is slidably connected to the connecting rod 13 along the length direction of the connecting rod 13.
Wherein the connecting piece 3 is T-shaped, or as shown in fig. 4, the connecting piece 3 is L-shaped. When the connecting piece 3 is in a T shape, the transverse edge of the connecting piece 3 is fixedly connected with the lower frame 12, and the vertical edge of the connecting piece 3 is connected with the second end of the connecting rod 13 in a sliding way; when the connecting piece 3 is in an L shape, one side of the connecting piece 3 is fixedly connected with the lower frame 12, and the other side of the connecting piece 3 is connected with the second end of the connecting piece 3 in a sliding way.
In order to realize the slidable connection between the connecting member 3 and the second end of the connecting rod 13, as shown in fig. 4 and 5, the projection screen further includes a pressing cover 4, the second end of the connecting rod 13 has a sliding slot 131, the pressing cover 4 is fixed at the second end of the connecting rod 13 and covers the sliding slot 131, and the connecting member 3 is slidably located in an accommodating cavity defined by the sliding slot 131 and the pressing cover 4; or the second end of the connecting rod 13 is provided with a limiting groove, and the connecting piece 3 is slidably positioned in the limiting groove.
Thus, the connecting piece 3 can be limited in the length direction and the thickness direction of the curtain sheet 2 relative to the connecting piece 3, and can slide in the width direction of the curtain sheet 2. In practical use, after the upper frame 11 is supported on the support, the second side edge of the curtain sheet 2 can naturally droop under the gravity action of the lower frame 12 and the gravity of the second side edge, so that the curtain sheet 2 can be unfolded.
Further, when the connecting member 3 and the connecting rod 13 slide relatively, in order to increase the relative sliding distance between the connecting member 3 and the connecting rod 13, the projection screen may further include an elastic member, one end of the elastic member is connected to the connecting member 3, and the other end of the elastic member is limited in the sliding groove 131 or the limiting groove.
Illustratively, the elastic member is a compression spring, so that when the connecting member 3 slides relative to the connecting rod 13, the elastic force of the compression spring can further urge the lower frame 12 away from the connecting rod 13, thereby further increasing the distance between the lower frame 12 and the upper frame 11 to improve the flatness of the curtain sheet 2.
In other embodiments, lower border 12 has an extension toward upper border 11 that is slidably coupled to a second end of connecting rod 13.
The connection mode of the extending portion and the second end of the connecting rod 13 can refer to the connection mode of the connecting member 3 and the second end of the connecting rod 13 in the above embodiment, and can further combine with the description of the above embodiment, and an elastic member is connected to the end portion of the extending portion, so as to further urge the lower frame 12 to be away from the connecting rod 13 under the elastic force action of the elastic member, which is not described again in this embodiment of the application.
In still other embodiments, lower frame 12 has a groove in which the second end of connecting rod 13 is slidably located in its length.
Optionally, the projection screen further comprises an adjusting member, the bottom of the groove has a threaded hole, and the adjusting member is screwed into the threaded hole and abuts against the second end of the connecting rod 13. Like this, when lower frame 12 droops naturally in order taut curtain piece 2, in order to guarantee the roughness of curtain piece 2, can also be through the length of adjustment key precession recess to reduce the length that the second end of connecting rod 13 stretched into the recess, thereby further impel lower frame 12 to keep away from connecting rod 13.
Of course, in addition to the above manner, the lower frame 12 may be further urged away from the connecting rod 13 by combining the manner of disposing the elastic member described in the above embodiments, which is not described in detail in this application embodiment.
In the second case, the first end of the connecting rod 13 is slidably connected to the upper frame 11 in the longitudinal direction of the connecting rod 13, and the second end of the connecting rod 13 is fixedly connected to the lower frame 12.
The slidable connection between the first end of the connecting rod 13 and the upper frame 11 may be combined with the slidable connection between the second end of the connecting rod 13 and the lower frame 12 described in the above embodiments, which is not limited in the embodiments of the present application.
Illustratively, the projection screen further includes a connecting member 3, the connecting member 3 is fixedly connected to the upper frame 11, and the connecting member 3 is slidably connected to the connecting rod 13. The second end of the connecting rod 13 has a limiting groove, and the connecting member 3 is slidably located in the limiting groove.
It should be noted that, when the first end of the connecting rod 13 is slidably connected to the upper frame 11, after the upper frame 11 is supported on the supporting body, the curtain sheet 2 can be unfolded under the gravity action of the lower frame 12 and the connecting rod 13 and the gravity action of the curtain sheet 2 itself, so that the flatness of the curtain sheet 2 can be further ensured relative to the case where the second end of the connecting rod 13 is slidably connected to the lower frame 12.
For the third situation, two ends of the connecting rod 13 are respectively fixedly connected with the upper frame 11 and the lower frame 12, and the length of the connecting rod 13 is adjustable. Thus, the curtain sheet 2 can be unfolded by adjusting the length of the connecting rod 13.
Optionally, the connecting rod 13 comprises a first sub-connecting rod and a second sub-connecting rod; the first end of the first sub-connecting rod is fixedly connected with the upper frame 11, the second end of the second sub-connecting rod is fixedly connected with the lower frame 12, and the second end of the first sub-connecting rod and the second end of the second sub-connecting rod are in slidable splicing. Therefore, after the upper frame 11 is supported on the wall body, the curtain sheet 2 can be unfolded under the gravity action of the lower frame 12 and the second sub-connecting rod and the gravity action of the curtain sheet 2.
The second end of the first sub-connecting rod is provided with a slot, the second end of the second sub-connecting rod can be slidably positioned in the slot, or the second end of the second sub-connecting rod is provided with a slot, and the second end of the first sub-connecting rod can be slidably positioned in the slot.
Of course, the length of the connecting rod 13 can be adjusted in other ways besides the way of inserting the first sub-connecting rod and the second sub-connecting rod to adjust the length of the connecting rod 13. Illustratively, the second end of the first sub-connecting rod and the second end of the second sub-connecting rod are connected through a compression spring, so that the first sub-connecting rod and the second sub-connecting rod are urged to be relatively far away through the elastic force of the compression spring, and the length of the connecting rod is adjusted.
In the embodiment of the present application, when the projection screen is fixed, as shown in fig. 6, the projection screen further includes a hanger 7, the hanger 7 is used for being fixed on the support, the upper frame 11 has a hanging groove, and a hook of the hanger 7 is located in the hanging groove to support the upper frame 11 on the support. In order to fix the lower frame 12, as shown in fig. 6, the projection screen further includes a first fixing member 5, where the first fixing member 5 is used to be fixed on the supporting body; the tensioning assembly 6 is fixedly connected with the lower frame 12 and the first fixing piece 5 through the tensioning assembly 6.
Thus, after the upper frame 11 is supported on the supporting body by the hanging rack 7, the lower frame 12 can be fixed by the cooperation of the tightening assembly 6 and the first fixing member 5. When the tightening assembly 6 is fixedly connected to the first fixing member 5, the lower frame 12 and the first fixing member 5 can be fixedly connected along the thickness direction of the curtain sheet 2, or can be fixedly connected along a direction perpendicular to both the upper frame 11 and the lower frame 12.
In order to ensure the flatness of the curtain sheet 2 after being unfolded, the tensioning assembly 6 is fixedly connected with the lower frame 12 and the first fixing member 5 along a direction perpendicular to the upper frame 11 and the lower frame 12 at the same time, as the distance between the upper frame 11 and the lower frame 12 is adjustable. The tensioning assembly 6 can now exert a pulling force on the lower frame 12 away from the center of the screen 2, thereby achieving tensioning of the screen in the up-down direction of the screen.
Optionally, the tightening assembly 6 includes a first magnet 61, the lower frame 12 has a first limiting groove, the first magnet 61 is limited in the first limiting groove, and the first magnet 61 and the first fixing member 5 are fixed by adsorption.
The first magnet 61 is located above the first fixing member 5. The first fixing member 5 is a metal member, and the first fixing member 5 may be fixedly connected to the support body by an adhesion method or a screw fixing method. When the first fixing member 5 and the first magnet 61 are fixed by attraction, the lower frame 12 can be fixed, and the curtain sheet 2 can be further tensioned.
Alternatively, as shown in fig. 7 or 8, the tightening assembly 6 includes a first magnet 61, a second magnet 62, and a second fixing member 63; the second fixing member 63 is fixedly connected with the lower frame 12, the second fixing member 63 is provided with a third limiting groove, the first magnet 61 is limited in the third limiting groove, the first fixing member 5 is provided with a second limiting groove, the second magnet 62 is limited in the second limiting groove, and the first magnet 61 and the second magnet 62 are fixedly adsorbed. The first magnet 61 is located above the second magnet 62.
Optionally, the tightening assembly 6 comprises an adjustment screw; the first fixing member 5 has a through hole, the lower frame 12 has a threaded hole, a threaded end of the adjusting screw passes through the through hole and is screwed into the threaded hole, and a nut end of the adjusting screw is limited at one side of the first fixing member 5.
Wherein, first mounting 5 can carry on spacingly to adjusting screw's nut section to when screwing or loosening adjusting screw, adjusting screw precession screw hole's length synchronous variation, with the adjustment to the progress of drawing of lower frame 12, thereby the realization is to the fixed of lower frame 12, realizes simultaneously the further take-up to curtain piece 2.
In the embodiment of this application, because the distance between the upper and lower frame is adjustable to at the fixed back of upper frame, can adjust the position of lower frame, realize the take-up of curtain piece, make the curtain piece be in the state of expanding, and guarantee the roughness after the curtain piece expandes. Therefore, under the condition of ensuring the normal use of the screen, the structure of the projection screen is simplified, the cost and the weight of the projection screen are reduced, and the assembly efficiency of the projection screen is improved. The upper frame and the lower frame can be connected only by adopting at least one connecting rod, so that the number of connecting pieces (side frames and connecting rods) between the upper frame and the lower frame is reduced, and the possibility of distortion and deformation of the curtain due to the deflection of the connecting rods is reduced. When the projection screen is fixed, the curtain can be further tensioned through the fixation of the lower frame, so that the flatness of the curtain is improved.
The above description is only illustrative of the embodiments of the present application and is not intended to limit the embodiments of the present application, and any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present application should be included in the scope of the embodiments of the present application.
Claims (10)
1. A projection screen, comprising:
the frame comprises an upper frame, a lower frame and a connecting rod, wherein the first end of the connecting rod is connected with the upper frame, the second end of the connecting rod is connected with the lower frame, and the distance between the lower frame and the upper frame is adjustable;
and the first side edge and the second side edge which are opposite to each other on the curtain sheet are respectively fixedly connected with the upper frame and the lower frame.
2. The projection screen of claim 1 wherein a first end of the connecting rod is fixedly connected to the upper bezel and a second end of the connecting rod is slidably connected to the lower bezel in a length direction of the connecting rod.
3. The projection screen of claim 2, further comprising a connector fixedly connected to the lower frame, wherein the connector is slidably connected to the connecting rod along the length of the connecting rod.
4. The projection screen of claim 3, further comprising a pressing cover, wherein the second end of the connecting rod has a sliding slot, the pressing cover is fixed to the second end of the connecting rod and covers the sliding slot, and the connecting member is slidably disposed in a receiving cavity defined by the sliding slot and the pressing cover.
5. A projection screen according to claim 3 or 4 wherein the connector is L-shaped or T-shaped.
6. The projection screen of claim 2 wherein the lower bezel has an extension toward the upper bezel, the extension being slidably coupled to the second end of the connecting rod.
7. A projection screen according to claim 2 wherein the lower bezel has a recess and the second end of the connecting rod is slidably positioned in the recess.
8. The projection screen of claim 7, further comprising an adjustment member, wherein the bottom of the recess has a threaded hole, and wherein the adjustment member is threaded into the threaded hole and abuts the second end of the connecting rod.
9. The projection screen of claim 1, wherein the number of the connecting rods is 2, two ends of a first connecting rod of the two connecting rods are respectively connected with one end of the upper frame and one end of the lower frame, and two ends of a second connecting rod of the two connecting rods are respectively connected with the other end of the upper frame and the other end of the lower frame.
10. The projection screen of claim 1 wherein a first side of the screen is adhesively secured to the upper frame and a second side of the screen opposite the first side is adhesively secured to the lower frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121476335.2U CN215117156U (en) | 2021-06-29 | 2021-06-29 | Projection screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121476335.2U CN215117156U (en) | 2021-06-29 | 2021-06-29 | Projection screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215117156U true CN215117156U (en) | 2021-12-10 |
Family
ID=79311132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121476335.2U Active CN215117156U (en) | 2021-06-29 | 2021-06-29 | Projection screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215117156U (en) |
-
2021
- 2021-06-29 CN CN202121476335.2U patent/CN215117156U/en active Active
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