CN108169987B

CN108169987B - Projection system and projection host fixing device thereof

Info

Publication number: CN108169987B
Application number: CN201810078984.3A
Authority: CN
Inventors: 田新团; 杨长明
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2018-01-26
Filing date: 2018-01-26
Publication date: 2020-08-28
Anticipated expiration: 2038-01-26
Also published as: CN108169987A

Abstract

The invention provides a projection system and a projection host fixing device thereof. The projection host fixing device is used for keeping the relative position of the projection host and a screen and comprises a supporting seat, a first positioning assembly and a second positioning assembly; the lower surface of the supporting seat is provided with an anti-skid pad; the first positioning component comprises a plurality of positioning blocks, is arranged on the upper surface of the supporting seat and is used for keeping the projection host machine and the supporting seat fixed in the horizontal direction; the second positioning assembly comprises at least two positioning rods; the first end of the positioning rod is rotatably arranged on the side surface of the supporting seat; the second end of the positioning rod can be abutted to the wall where the screen is located so as to keep the distance between the supporting seat and the wall. The invention can prevent the relative position offset between the projection host and the screen, and can lead the projection host to be capable of resetting quickly after the position offset between the projection host and the screen is generated.

Description

Projection system and projection host fixing device thereof

Technical Field

The invention relates to the technical field of projection, in particular to a projection system and a projection host fixing device thereof.

Background

One characteristic of optical display projection is that an image projected by a projection host needs to be projected on a corresponding screen, and if the projected image and the screen are separated, the visual effect is very poor. At present, when an optical projection host, especially an ultra-short-focus projector, used in the market is placed on a desktop, when a user touches the host or the desk, an image projected by the projector on a screen or other objects may be shifted, which may cause image deformation or image quality degradation. There is a need for a device that can be used to hold a host in place or that can be moved and quickly adjusted into place by a user. The main scheme that current producer took is all to increase the contact friction between projection host computer truckle and the desktop, but because the truckle can't be done too big, lead to little with desktop area of contact, increase the contact friction of truckle and desktop and can prevent that slight collision from causing the host computer displacement, if the collision is too big or because of the user needs remove the back with the host computer, hardly guarantee the host computer when putting back the host computer again and can put back the normal position, make the relative position skew appear between host computer and the screen easily, cause the influence to the projecting image, bring very big inconvenience for the use.

Disclosure of Invention

The invention aims to provide a fixing device for a projection host, which is used for preventing the relative position offset between the projection host and a screen and enabling the projection host to be quickly reset after the position offset between the projection host and the screen occurs.

Another objective of the present invention is to provide a projection system having the above-mentioned projection host fixing apparatus.

In order to solve the technical problems, the invention adopts the following technical scheme:

according to one aspect of the present invention, the present invention provides a projection host fixing device for maintaining the relative position of a projection host and a screen; the projection host fixing device comprises a supporting seat, a first positioning assembly and a second positioning assembly; the lower surface of the supporting seat is provided with an anti-skid pad; the first positioning component comprises a plurality of positioning blocks which are arranged on the upper surface of the supporting seat and used for keeping the projection host machine and the supporting seat fixed in the horizontal direction; the second positioning assembly comprises at least two positioning rods; the first end of the positioning rod is rotatably arranged on the side surface of the supporting seat; the second end of the positioning rod can be abutted to the wall surface where the screen is located so as to keep the distance between the supporting seat and the wall surface.

According to another aspect of the present invention, the present invention further provides a projection system, including a projection host and the projection host fixing device as described above, the projection host fixing device is configured to support the projection host on a support table so as to maintain a relative position with respect to a screen.

According to the technical scheme, the invention has at least the following advantages and positive effects: in the fixing device for the projection host, the projection host is fixed on the supporting seat by the first positioning assembly, the projection host is fixed on the supporting seat such as a cabinet or a desk by the supporting seat, the contact area between the supporting seat and the supporting seat is large, the friction coefficient is further increased by the anti-slip pad arranged on the lower surface of the supporting seat, and the friction force between the supporting seat and the supporting seat is far greater than that when the projection host is directly contacted with the supporting seat, so that the projection host can be firmly fixed on the supporting seat, and the relative position deviation between the projection host and the screen caused by collision is effectively prevented. Meanwhile, the fixing device also utilizes the second positioning assembly to enable the supporting seat to be aligned with the wall surface quickly, specifically, after the relative position between the projection host and the screen meets the projection image quality requirement, the positioning rod of the second positioning assembly is abutted to the wall surface where the screen is located to keep the distance between the supporting seat and the wall surface, if the projection host and the supporting seat are moved integrally, the relative position between the supporting seat and the wall surface can be determined through the positioning rod, and the projection host can be conveniently reset quickly.

Drawings

Fig. 1 is a schematic view of a preferred embodiment of the projection system of the present invention in use.

FIG. 2 is a schematic diagram of a projection system according to a preferred embodiment of the present invention, wherein the host projection fixture is disassembled.

FIG. 3 is a schematic diagram of a non-slip mat in a preferred embodiment of the host projector mount of the present invention.

FIG. 4 is a schematic view of an assembly structure of a fixing device of a projection host according to a preferred embodiment of the present invention, in which a positioning rod is in an extended state.

FIG. 5 is a schematic view of an assembly structure of a preferred embodiment of the fixing device of the projection host according to the invention, in which the positioning rod is in a retracted state.

FIG. 6 is a schematic view of a positioning block in a preferred embodiment of the fixing apparatus for a projection host according to the invention.

FIG. 7 is a partial schematic view of the positioning rod and the supporting plate at the position where the positioning rod is engaged in the fixing device of the projection host machine according to the preferred embodiment of the invention.

FIG. 8 is a schematic structural diagram of a positioning rod in a preferred embodiment of the fixing device for a projection host according to the invention.

The reference numerals are explained below: 1. a fixing device; 11. a supporting seat; 111. a support plate; 1111. an accommodating groove; 1112. an end face; 112. a non-slip mat; 1121. a cushion body; 1122. a suction cup; 12. positioning blocks; 121. an arc-shaped notch; 13. easy-to-pull glue; 14. positioning a rod; 141. an inner rod member; 142. an outer rod member; 143. a limiting member; 144. a rotating shaft; 15. stamping; 2. a projection host; 21. a caster wheel; 3. a screen; 4. a support table; 5. a wall surface.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

As shown in fig. 1, a projection host 2 is placed on a support 4 through a projection host fixing device 1 (hereinafter referred to as "fixing device 1"), the support 4 is a structural member capable of providing a horizontal support surface, such as a cabinet, a table, a shelf, and the like, and the support 4 is placed adjacent to a wall surface 5. The fixing device 1 fixes the projection host 2 on the wall surface 5 and keeps the relative position with the wall surface 5, so that the projection host 2 and the screen 3 hung on the wall surface 5 establish a relatively stable position relation. The fixing device 1 of the invention is particularly suitable for fixing the short-focus or even ultra-short-focus projection host 2.

Referring to fig. 2, the fixing device 1 includes a supporting base 11, a first positioning component for fixing the projection host 2, and a second positioning component for aligning the wall surface 5.

The support base 11 includes a support plate 111 and a plurality of non-slip pads 112 adhered to a lower surface of the support plate 111. In the structure shown in fig. 2, the supporting plate 111 is rectangular, and the anti-slip pads 112 are disposed at four corners of the supporting plate 111. In other embodiments, the non-slip mat 112 may be distributed on the entire lower surface of the supporting plate 111 or disposed in the middle region of the supporting plate 111. The non-slip mat 112 is made of a material having a high friction coefficient such as rubber.

Referring to fig. 3, in the embodiment, the non-slip mat 112 includes a mat body 1121 and a plurality of suction cups 1122 integrally formed on the mat body 1121, the suction cups 1122 are uniformly distributed on the lower surface of the mat body 1121, the openings of the suction cups 1122 face downward, and the upper surface of the mat body 1121 is adhered to and fixed to the supporting plate 111. When the projector main body 2 is mounted on the support base 11, air inside the suction pad 1122 is discharged to generate a negative pressure, thereby increasing the frictional force between the mat 112 and the support base 4. The structure of the non-slip mat 112 is better able to guarantee a stable and non-moving fixing device 1 with respect to the solutions of the prior art when a certain lateral force is applied to the fixing device 1.

Preferably, the diameter of the suction cup 1122 is between 5mm to 30mm, so that the suction cup 1122 can perform a good function of increasing friction force, and the abrasion resistance of the non-slip mat 112 can also perform a function of increasing friction force.

Referring to fig. 2, 4 and 5, in the present embodiment, the first positioning assembly includes four positioning blocks 12, and an arc notch 121 is disposed on one side of each positioning block 12. After the position of the projection host 2 on the support plate 111 is adjusted, the positioning blocks 12 are used for positioning the four casters 21 of the projection host 2, the arc-shaped notches 121 of the positioning blocks 12 are attached to the casters 21 to reliably fix the casters 21, and meanwhile, the bottom surfaces of the positioning blocks 12 are bonded to the upper surface of the support plate 111, so that the projection host 2 is fixed to the support plate 111 in the horizontal direction, and the projection host 2 cannot move in the horizontal direction. Even after the projection main machine 2 is moved, the projection main machine 2 can be quickly returned to the original position through the positioning block 12, and the projected image is ensured to be unchanged.

Referring to fig. 6, preferably, the positioning block 12 is adhered to the supporting plate 111 by an easy-open glue 13, and the easy-open glue 13 exceeds a side surface of the positioning block 12. When the positioning block 12 is stuck incorrectly or the positioning block 12 needs to be removed, the part of the easy-pulling glue 13 beyond the positioning block 12 can be stretched outwards, so that the positioning block 12 can be separated from the supporting plate 111 and no residual glue is left on the supporting plate 111.

The positioning blocks 12 are not limited to being fixed on the support plate 111 by bonding with the easy-open adhesive 13, and the number of the positioning blocks 12 and the positions thereof on the support plate 111 may be adapted according to the casters 21 of the projection host 2. In other possible embodiments, the positioning block 12 may also position other structural members of the projection host 2, and the positioning block 12 may prevent the projection host 2 from moving on the supporting plate 111 in the horizontal direction.

Referring to fig. 4, 5 and 7, in the present embodiment, the second positioning assembly includes two positioning rods 14 disposed at intervals. The positioning rod 14 has one end rotatably connected to the support plate 111 through the rotating shaft 144 and the other end extending outwardly from the side of the support plate 111 along with the rotation of the positioning rod 14, and abuts against the wall surface 5 where the screen 3 is located to maintain the distance of the support plate 111 relative to the wall surface 5.

Preferably, the free ends of the two positioning rods 14 (i.e. the ends far away from the rotating shaft 144) are provided with the stamps 15. When the positioning rod 14 extends out from the side surface of the supporting plate 111 and the free end thereof is tightly attached to the wall surface 5, the stamp 15 can mark on the wall surface 5, the mark is used as a reference for position reference, and after the fixing device 1 moves, the positioning rod 14 is aligned and matched with the mark again to ensure that the fixing device 1 is placed at the initial position.

The stamp 15 on the positioning rod 14 can also be replaced by other marking pieces capable of marking on the wall surface 5, for example, a small section of pencil lead can be fixed at the free end of the positioning rod 14, and the pencil lead is used for marking on the wall surface 5 by drawing a circle. The positioning rod 14 is used as a positioning member, and can be aligned and matched with the mark on the wall surface 5, so that the fixing device 1 can be quickly adjusted to the initial position. If no marker is set on the positioning rod 14, after the projection host 2 is first installed and positioning is completed, the user can manually mark the initial position of the wall 5 adjacent to the positioning rod 14 by using an additional marking tool.

Preferably, the supporting plate 111 is provided with a strip-shaped receiving slot 1111 extending along a length of one side thereof, and the two positioning rods 14 are rotatably connected to two ends of the receiving slot 1111, respectively.

As shown in fig. 4 and 7, when the positioning rod 14 is used, both the positioning rods 14 extend outward from the side surface of the support plate 111, the end surfaces 1112 at both ends of the receiving groove 1111 limit the rotation of the positioning rods 14, and when the positioning rod 14 rotates outward (i.e., in a direction away from the support plate 111) to be engaged with the end surfaces 1112 of the receiving groove 1111, the positioning rod 14 rotates outward to an outer limit position. At this time, the free end of the positioning rod 14 is brought into close contact with the wall surface 5 to leave a mark on the wall surface 5, or is aligned with the mark on the wall surface 5. This structure utilizes the shape structure of accepting groove 1111 self to carry out the rotation of spacing locating lever 14, makes the position when locating lever 14 counterpoints fixed, ensures the accuracy of counterpointing.

As shown in fig. 5, after the positioning rods 14 are used, they rotate inward and retract, and the two positioning rods 14 are accommodated in the accommodating grooves 1111 at the same time, so that the overall appearance is not affected.

Referring to fig. 7 and 8, in the present embodiment, the positioning rod 14 is a telescopic rod, and includes an inner rod 141 and an outer rod 142 sleeved outside the inner rod 141, and the inner rod 141 and the outer rod 142 are slidably engaged to achieve extension and retraction, so that the total length of the positioning rod 14 can be adjusted. The end of the outer rod 142 is rotatably connected to the supporting plate 111 through a rotating shaft 144, and the end of the inner rod 141 is provided with a stamp 15. The sleeved joint of the outer rod 142 and the inner rod 141 is limited and fixed by a limiting member 143, and after the positioning rod 14 is adjusted to a proper length, the outer rod 142 and the inner rod 141 are locked to maintain the length of the positioning rod 14.

The limiting member 143 can be a screw, the outer rod 142 is provided with a through hole, the limiting member 143 passes through the through hole and is screwed and fixed, the inner end of the limiting member 143 abuts against the inner rod 141, the inner rod 141 and the outer rod 142 can be fixed, and the total length of the positioning rod 14 can be adjusted steplessly.

The method of use of the fixation device 1 of the present embodiment is substantially as follows:

1. in the initial stage of mounting the projection host 2, the support seat 11 is firstly placed on the support platform 4, and the support seat 11 can be stably positioned on the support platform 4 by using the anti-slip pad 112 on the lower surface of the support seat 11;

2. the projection host 2 is placed on the supporting plate 111 of the supporting seat 11, and the position of the projection host 2 on the supporting plate 111 is adjusted until the image projected by the projection host 2 is completely projected on the screen 3 and meets the projection image quality requirement;

3. closely attaching the positioning block 12 to each caster 21 of the projection host 2, and simultaneously bonding and fixing the positioning block 12 on the support plate 111 through the easy-pulling glue 13, positioning the position of the projection host 2, and limiting the movement of the projection host 2 in the horizontal direction;

4. the positioning rod 14 extends out from the side surface of the supporting plate 111, the positioning rod 14 abuts against the end surface 1112 of the accommodating groove 1111 for limiting, the limiting piece 143 is unscrewed, the inner rod 141 is pulled out from the outer rod 142 until the stamp 15 at the tail end of the inner rod 141 abuts against the wall surface 5, the limiting piece 143 is locked, and the inner rod 141 and the outer rod 142 are limited and fixed; at this time, the stamp 15 will leave a mark on the wall surface 5;

5. the positioning rod 14 is rotated to retract the positioning rod 14 into the housing groove 1111, wherein the length of the positioning rod 14 is maintained to the length after the locking stopper 143 in the previous step.

In the subsequent use of the projection system, for example, when the projection host 2 is removed from the fixing device 1 and then reset, the projection host 2 is quickly replaced to the initial position by using the position of the positioning block 12 as the position reference of the projection host 2. If the fixing device 1 and the projection host 2 are moved integrally and needs to be reset again, the positioning rod 14 is rotated and extended out of the accommodating groove 1111, the position of the fixing device 1 is adjusted until the free end of the positioning rod 14 is aligned with the mark left before the wall surface 5 and abuts against the wall surface 5, and therefore the fixing device 1 is reset to the initial position.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A projection host fixing device is used for keeping the relative position of a projection host and a screen; it is characterized by comprising:

the lower surface of the supporting seat is provided with an anti-slip pad, and the supporting seat is used for being in contact with the supporting table;

the first positioning assembly comprises a plurality of positioning blocks and a first positioning block, the positioning blocks are arranged on the upper surface of the supporting seat, and arc-shaped notches are formed in the positioning blocks and matched with trundles of the projection host machine so as to keep the projection host machine and the supporting seat fixed in the horizontal direction;

the second positioning assembly comprises at least two positioning rods; the first end of the positioning rod is rotatably arranged on the side surface of the supporting seat; the second end of the positioning rod can be abutted to the wall where the screen is located so as to keep the distance between the supporting seat and the wall.

2. The host computer projection fixture of claim 1 wherein the second positioning assembly further comprises a marker disposed at the second end of the positioning rod, the marker being capable of contacting the wall surface to mark the wall surface when the positioning rod is coupled to the wall surface.

3. The apparatus of claim 1, wherein the supporting base has a receiving slot extending along a side of the supporting base, and two ends of the receiving slot are each rotatably connected to a positioning rod;

the two positioning rods can be contained in the containing grooves and are limited by the end faces of the containing grooves when the positioning rods rotate outwards to be adjacent to the wall surface.

4. The apparatus of claim 3, wherein the positioning rod has a shaft at a first end thereof, and is rotatably coupled to the supporting base via the shaft.

5. The host computer projection fixture of claim 1, wherein the positioning rod comprises at least two rods capable of sliding and extending relative to each other to adjust the length of the positioning rod;

and a limiting part is arranged between every two adjacent rod pieces, and the limiting part limits and fixes the two adjacent rod pieces so as to keep the length of the positioning rod.

6. The apparatus according to claim 5, wherein two adjacent rods are slidably engaged with each other, a through hole is formed in the outer rod, and the position-limiting member is inserted into the through hole and abuts against the inner rod, so that the two rods are fixed relative to each other.

7. The projection host fixing device of any one of claims 1-6, wherein the positioning block is attached to the surface of the support base by a pop-top tape, and the pop-top tape extends beyond a side surface of the positioning block.

8. The host computer fixing device of any one of claims 1-6, wherein the non-slip mat comprises a mat body and a plurality of suckers integrally formed on the mat body, the suckers have openings facing downward, and the suckers have a diameter of 5mm to 30 mm.

9. A projection system comprising a projection host, wherein the projection system further comprises a projection host fixing device as claimed in any one of claims 1-8, the projection host fixing device is used for supporting the projection host on a support table so as to maintain a relative position with a screen.