CN104455983A - Screen levelness adjusting mechanism and projection display device - Google Patents
Screen levelness adjusting mechanism and projection display device Download PDFInfo
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- CN104455983A CN104455983A CN201410717064.3A CN201410717064A CN104455983A CN 104455983 A CN104455983 A CN 104455983A CN 201410717064 A CN201410717064 A CN 201410717064A CN 104455983 A CN104455983 A CN 104455983A
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Abstract
The invention discloses a screen levelness adjusting mechanism and a projection display device, relates to the technical field of display, and aims to solve the problem of low screen levelness adjusting efficiency. The screen levelness adjusting mechanism comprises a reference part, a support shaft, a cam and a support plate, wherein the reference part and the support shaft are arranged on the back surface of a screen, and are positioned on the two sides of the vertical centerline of the screen; a retractable pawl component is arranged on the support shaft; a shaft hole is formed in the rotating center of the cam; a plurality of ratchets are annularly arranged on the inner surface of the shaft hole; the cam is arranged on the support shaft through the shaft hole in a sleeving way; each ratchet and the pawl component form a pawl wheel mechanism; the support plate is arranged on a screen support body; the upper surface of the support plate is in contact with the contour surface of the cam to support the cam. The screen levelness adjusting mechanism is used for regulating the levelness of the screen when the screen is suspended on the screen support body.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of screen level degree regulating mechanism and projection display.
Background technique
In recent years, the raising that development and user along with Display Technique require display quality, the screen of projection display progressively adopts hard screen, and the screen of this hard screen generally adopts the mode mounted to be arranged on wall at present.But, easily there is screen inclination phenomenon when screen is mounted on wall after, cause the picture of On Screen Display to occur inclination, have a strong impact on the viewing effect of user in the existence of and alignment error comparatively large due to screen aspect size.
In order to solve the problem, often adjust the levelness of screen in the following ways: two fixed supports are set at the screen back side in prior art, fixed support is provided with adjusting screw, when screen is mounted on wall by two fixed supports, the distance of two fixed support in the vertical directions can be adjusted by adjusting screw, thus realize the Level-adjusting of screen; But adopt this adjustment mode, screen can only be taken off adjustment from wall, and then screen is hung back on wall, the inconvenience bringing dismounting on the one hand and install, is also easy to the screen higher to cost in the process and causes damage, simultaneously owing to taking off adjustment, cannot real-time monitored adjustment effect, may need repeatedly to take off to re-mount and just can adjust to optimum position, the above-mentioned regulated efficiency that all causes is lower, and usually needs the operation of professional workforce.Therefore, as why not, screen is taken off and realizes screen level degree and regulate, thus reduce dismounting step, improve regulated efficiency and become the current technical problem being badly in need of solving.
Summary of the invention
The object of the present invention is to provide a kind of screen level degree regulating mechanism and projection display, realizing the adjustment of screen level degree for not taken off by screen, thus reduce step, the raising regulated efficiency of dismounting.
To achieve these goals, the invention provides following technological scheme:
A kind of screen level degree regulating mechanism, comprising:
To be arranged on the screen back side and the benchmark piece that can be connected with screen support body pivotable;
Being arranged on the screen back side and being positioned at the left side of described benchmark piece or the back shaft on right side, described back shaft is provided with telescopic pawl assembly;
Rotating center is provided with the cam of axis hole, and the internal surface of described axis hole is equipped with multiple ratchet, and described cam is contained on described back shaft by described shaft hole sleeve, and each described ratchet and described pawl assembly form ratchet mechanism;
Be arranged on the dunnage on screen support body, the upper surface of described dunnage contacts to support described cam with the contoured surface of described cam.
Preferably, described back shaft is provided with radial direction through hole, described pawl assembly is arranged in described radial direction through hole, and described pawl assembly comprises: be slidably mounted on two ratchets in described radial direction through hole, and is positioned at the spring that described radial direction through hole, two ends are connected with two described ratchets respectively; Wherein,
Two described ratchet one end stretch out described radial direction through hole respectively, and the external part of each described ratchet is provided with: be convenient to described cam around described back shaft one direction rotate domatic, and the step surface that stops described cam around described back shaft counter-rotation can be engaged with described ratchet.
Preferably, in described radial direction through hole, be provided with guide rail, two described ratchets be respectively equipped with the guiding groove with described guide rail.
Preferably, described cam is eccentric wheel.
Further, described eccentric outer peripheral surface is arranged at intervals with multiple draw-in groove, described screen level degree regulating mechanism also comprises: coordinate described eccentric wheel to use with the round nut type spanner making described eccentric wheel rotate around described back shaft.
Preferably, described eccentric outer peripheral surface is provided with annular groove, and described multiple draw-in groove is located on the bottom surface of described annular groove.
Preferably, described dunnage is provided with the strip bulge stretched in described annular groove.
Further, above-mentioned screen level degree regulating mechanism also comprises connecting plate and cover plate, described back shaft is arranged on the screen back side by described connecting plate, and described cover plate to cover on described connecting plate and is fixedly connected with described screen, and described cam is between described connecting plate and described cover plate.
Further, described benchmark piece is change gear, and described change gear is provided with positioning hole, and when being mounted on screen support body by screen, described change gear is hung over by described positioning hole on the supporting post that is fixedly arranged on screen support body.
The present invention additionally provides a kind of projection display simultaneously, comprising: projector, with described projector with the use of screen, and be located on the back side of described screen, screen level degree regulating mechanism that technique scheme is carried.
In technique scheme, owing to have employed cam, dunnage and ratchet mechanism, and can relative screen support rotate benchmark piece, when cam rotates around back shaft according to direction initialization, the contoured surface that cam contacts with dunnage changes, distance between back shaft and dunnage is changed, thus makes one end (near the cam) the other end (near benchmark piece) rising or decline relatively of screen, and then change the levelness of screen; In addition, because each ratchet and pawl assembly form ratchet mechanism, cam can only one direction be rotated, can not counter-rotation, and when screen being adjusted to required levelness, utilize above-mentioned ratchet mechanism cam can be locked, to prevent cam counter-rotation, thus make screen remain on this levelness.
Therefore, adopt screen level degree regulating mechanism provided by the invention, because the distance between back shaft and dunnage realizes by rotating cam, and rotating cam can be mounted on screen support body at screen and completes, making not need when adjusting screen level and spending to be taken off from screen support body by screen just can the levelness of adjusting screen; In addition, the also situation of easy-to-operat personnel Real Time Observation adjustment, can than comparatively fast adjusting to the optimum state, also reduce simultaneously and screen is taken off and the process steps again loaded onto, save regulation time, avoid the damage that may cause screen, need screen to take off compared to adjusting in prior art when screen level is spent, the situation that simultaneously may need professional workforce to operate, what the present embodiment technological scheme made that operator can be more convenient reaches adjustment object, improves the efficiency of adjustment screen level degree.
In sum, adopt screen level degree regulating mechanism provided by the invention, do not need screen to take off can realize screen level degree regulate, thus reduce dismounting step, improve regulated efficiency.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is structural representation when screen level degree regulating mechanism that the embodiment of the present invention provides is arranged on the screen back side;
The exploded view of the screen level degree regulating mechanism that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the constitutional diagram of screen level degree regulating mechanism in Fig. 2;
Fig. 4 is the exploded view of Fig. 2 cam and back shaft;
Fig. 5 is the constitutional diagram of Fig. 4 cam and back shaft;
Fig. 6 is the side view after Fig. 5 cam and back shaft combine;
Fig. 7 is the cam of another kind of form and the constitutional diagram of back shaft in Fig. 2.
Reference character:
10-screen, 20-benchmark piece, 21-positioning hole,
30-back shaft, 31-radial direction through hole, 32-ratchet,
33-spring, 34-is domatic, 35-step surface,
40-cam, 41-axis hole, 42-ratchet,
43-annular groove, 44-draw-in groove, 50-dunnage,
60-spanner, 61-handle, 62-card-tight part,
63-pin, 70-connecting plate, 71-attachment post,
80-cover plate.
Embodiment
In order to further illustrate the screen level degree regulating mechanism and display unit that the embodiment of the present invention provides, be described in detail below in conjunction with Figure of description.
Refer to Fig. 1 ~ Fig. 5, the screen level degree regulating mechanism that the embodiment of the present invention provides comprises: benchmark piece 20, back shaft 30, cam 40 and dunnage 50, wherein, benchmark piece 20 and back shaft 30 are arranged on screen 10 back side, and back shaft 30 and benchmark piece 20 are positioned at the both sides of the vertical center line of screen 10, back shaft 30 is provided with telescopic pawl assembly; The rotating center of cam 40 is provided with axis hole 41, and the internal surface of axis hole 41 is equipped with multiple ratchet 42, and cam 40 is sleeved on back shaft 30 by axis hole 41, and each ratchet 42 and pawl assembly form ratchet mechanism; Dunnage 50 to be arranged on screen support body and to be positioned at below cam 40, and the upper surface of dunnage 50 and the contoured surface of cam 40 offset.
During concrete enforcement, screen support body is generally wall or supporting frame, for convenience, and hereafter will for screen support body for wall be described.Screen 10 is mounted on after on wall, and benchmark piece 20 can rotate by opposing sides; The structural type of benchmark piece 20 has multiple, and such as, benchmark piece 20 is reference axis, and corresponding wall is provided with the pivoting hole mated with this reference axis, and when screen 10 is mounted on wall, this reference axis injects in pivoting hole, and the hole that can be pivoted relative to each other is rotated; And for example, benchmark piece 20 is change gear, and this change gear has positioning hole 21, when mounting screen 10, coordinates to come support screen 10 with the strut be fixed on wall.Be understandable that, said reference part can also for being directly opened in the positioning hole 21 on screen 10 back side.
Back shaft 30 is arranged on screen 10 back side, and back shaft 30 and benchmark piece 20 are arranged in the bilateral symmetry of the vertical center line of screen 10, preferably, and two angular zones of back shaft 30 and benchmark piece 20 screen 10 upper rear portion; Back shaft 30 is provided with telescopic pawl assembly.Dunnage 50 is arranged on wall, and is positioned at the below of back shaft 30; The rotating center (gyration center) of cam 40 is provided with axis hole 41, multiple ratchets 42 of unidirectional inclination are equipped with at the internal surface of axis hole 41, cam 40 is sleeved on after on back shaft 30, the contoured surface of cam 40 contacts with the upper surface of dunnage 50, pawl assembly on each ratchet 42 and back shaft 30 forms ratchet mechanism, cam 40 can only one direction be rotated around back shaft 30, and can not counter-rotation.
By above-mentioned screen level degree regulating mechanism, screen 10 is being mounted on after on wall, because benchmark piece 20 can rotate by opposing sides, therefore, when according to direction initialization rotating cam 40, the contoured surface that cam 40 contacts with dunnage 50 changes, distance between back shaft 30 to dunnage 50 is changed, thus make one end (near the cam) the other end (near benchmark piece) rising or decline relatively of screen 10, and then the levelness of screen 10 can be changed, namely have adjusted the levelness of screen 10.After screen 10 is adjusted to required levelness, pawl assembly can engage with corresponding ratchet 42, cam 40 is locked, thus can stop cam 40, because screen 10 is conducted oneself with dignity, counter-rotation is occurring, and then screen 10 can be made to remain on present level degree.
From technique scheme, because the distance between back shaft 30 and dunnage 50 is adjusted by rotating cam 40, and rotating cam 40 can be mounted on wall at screen 10 and completes, therefore, the screen level degree regulating mechanism adopting the embodiment of the present invention to provide, when adjusting screen 10 levelness, does not need the levelness of screen 10 being taken off just adjustable screen 10 from wall, in addition, the also situation of easy-to-operat personnel Real Time Observation adjustment, can than the levelness adjusted to faster needed for screen 10, simultaneously because not needing screen 10 to take off adjustment from wall, thus decrease the process steps of to be taken off by screen 10 and again loading onto, save regulation time, avoid the damage that may cause screen 10, compared to needing when adjusting screen 10 levelness in prior art, screen is taken off, the situation that simultaneously may need professional workforce to operate, what the present embodiment technological scheme made that operator can be more convenient reaches adjustment object, improve the efficiency of adjustment screen 10 levelness.
In sum, adopt screen level degree regulating mechanism provided by the invention, do not need screen 10 to take off can realize screen 10 levelness regulate, thus reduce dismounting step and improve regulated efficiency.In addition, due in rotating cam 40 process, the process that the relative the other end in one end of screen 10 rises or declines is continually varying, compared with the process jump change that the other end relative to one end of screen in prior art 10 rises or decline, also significantly improves the precision of adjustment screen 10 levelness.
It is worth mentioning that, above-mentioned one direction refers to clockwise direction or counter clockwise direction, is specifically determined by the true dip direction of ratchet 42.In addition, the shape and size of the above-mentioned precision of adjustment screen level degree and the contoured surface of cam 40, and the diameter of axis hole 41, ratchet 42 density etc. relevant, specifically can set as required.
In the above-described embodiments, the pawl assembly on back shaft 30 and each ratchet 42 constitute ratchet mechanism, and cam 40 can only one direction be rotated around back shaft 30, and can not counter-rotation.In order to realize the function of this ratchet mechanism, the specific constructive form of pawl assembly has multiple, preferably, refer to Fig. 4, Fig. 5 and Fig. 6, back shaft 30 is provided with radial direction through hole 31, pawl assembly is arranged in radial direction through hole 31, and pawl assembly comprises: be slidably mounted on two ratchets 32 in radial direction through hole 31, and is positioned at the spring 33 that radial direction through hole 31, two ends are connected with two ratchets 32 respectively; Wherein, two ratchet 32 one end stretch out radial direction through hole 31 respectively, and the external part of each ratchet 32 is provided with: be convenient to that cam 40 rotates around back shaft 30 domatic 34, and can engage the step surface 35 that stops cam 40 around back shaft 30 counter-rotation with ratchet 42.
Particularly, in the present embodiment, radial direction through hole 31 is horizontally disposed with, spring 33 is arranged in radial direction through hole 31, two ratchets 32 are slidably mounted in radial direction through hole 31, and radial direction through hole 31 is stretched out in one end of two ratchets 32, the upside of the external part of the ratchet 32 wherein stretched out on the left of radial direction through hole 31 is provided with step surface 35, and downside is provided with domatic 34; The upside of the external part of the ratchet 32 stretched out on the right side of radial direction through hole 31 is provided with domatic 34, and downside is provided with step surface 35.Time initial, the external part of two ratchets 32 lays respectively in the teeth groove between each self-corresponding adjacent two ratchets 42, when the clockwise direction (direction initialization) during cam 40 is according to Fig. 5 shown in arrow rotates, two domatic 34 on two ratchets 32 are subject to ratchet 42 and oppress, make two ratchets 32 to radial direction through hole 31 retraction, after crossing a ratchet 42, stretch out from radial direction through hole 31 under the spring-back force effect that two ratchets 32 provide at spring 33 again, so repeat above-mentioned retraction and stretch out process, after completing adjustment screen 10 levelness, the external part of two ratchets 32 lays respectively in the teeth groove between each self-corresponding adjacent two ratchets 42, two step surfaces 35 on two ratchets 32 engage with corresponding ratchet 42 respectively, cam 40 is locked, thus counter-rotation under the effect that cam 40 can be stoped to conduct oneself with dignity at screen 10, and then can ensure that screen 10 rests on present level degree.
In order to prevent two ratchets 32 from rotating in radial direction through hole 31, preferably, in radial direction through hole 31, being provided with guide rail (not indicating in figure), two ratchets 32 being respectively equipped with and the guiding groove of guide rail (not indicating in figure); Design like this, neither affect two ratchets 32 relatively radial direction through hole 31 slide, prevent two ratchets 32 from rotating in radial direction through hole 31 by cooperatively interact guide rail and guiding groove again.
In the specific implementation, the structural type of above-mentioned cam 40 has multiple, and such as, as shown in Figure 7, cam 40 is contoured surface oval disk-like structure asymmetrical relative to gyration center, and namely cam 40 is oval cam.Please continue to refer to Fig. 6, for the ease of realizing the adjustment of screen 10 levelness, preferably, cam 40 is eccentric wheel, adopts eccentric wheel to be convenient to cam 40 is rotated on the one hand, thus is convenient to the adjustment realizing screen 10 levelness; The process that the relative the other end in one end of screen 10 also can be made on the other hand to rise or decline is continually varying, thus improves the precision of adjustment screen 10 levelness further.
Please continue to refer to Fig. 1 and Fig. 2, rotate around back shaft 30 to order about above-mentioned eccentric wheel, be convenient to the adjustment realizing screen 10 levelness, in a preferred embodiment, above-mentioned screen level degree regulating mechanism also comprises: coordinate eccentric wheel to use with the round nut type spanner 60 making eccentric wheel rotate around back shaft 30.Particularly, round nut type spanner 60 comprises: handle 61, the crescent shape card-tight part 62 be fixedly connected with handle 61 one end, and the pin 63 being located at card-tight part 62 end; Accordingly, multiple draw-in groove 44 is set at the upper interval of eccentric contoured surface (outer peripheral surface).When making eccentric wheel rotate by above-mentioned round nut type spanner, card-tight part 62 and eccentric outer peripheral surface are fitted, and pin 63 engages with one of them draw-in groove 44, thus can order about eccentric wheel rotation.
For the ease of making spanner 60 engage with eccentric wheel, please continue to refer to Fig. 5 or Fig. 6, preferably, the contoured surface along the circumference of cam 40, cam 40 is provided with annular groove 43, and multiple draw-in groove 44 is located on the bottom surface of annular groove 43.When making eccentric wheel rotate by spanner 60, due to the existence of annular groove 43, spanner 60 can be engaged very smoothly with eccentric wheel.
To be mounted on after on wall owing to rocking after screen 10 opposing sides wall to causing screen 10 to come off to prevent screen 10, preferably, dunnage 50 is provided with the strip bulge (not shown) that can stretch in above-mentioned annular groove 43, utilizes this strip bulge that screen 10 can be stoped to come off.
Please continue to refer to Fig. 2 and Fig. 3, on the basis of above-described embodiment, screen level degree regulating mechanism also comprises connecting plate 70 and cover plate 80, and back shaft 30 is arranged on screen 10 back side by connecting plate 70; Cover plate 80 is fixedly arranged on screen 10 back side, and covers on cam 40.Particularly, the corner of connecting plate 70 is respectively provided with mounting hole, is arranged on screen 10 back side by four screws be inserted in four mounting holes by connecting plate 70; Cover plate 80 is provided with keeps away bit architecture, when cover plate 80 is fixed by screws in after on screen 10 back side, can not affect cam 40 and rotate, and the contoured surface of cam 40 exposes cover plate 80, rotate so that cam 40 pulled by spanner 60.Design like this, can prevent cam 40 and back shaft 30 from departing from.
Rotate in order to avoid cover plate 80 is out of shape and affects cam 40, preferably, the face of connecting plate 70 towards cam 40 is provided with four attachment posts, 71, four attachment posts 71 and is fixedly connected with cover plate 80 respectively.Design like this, utilizes four attachment posts 71 can support cover plate 80, thus can prevent cover plate 80 and cam 40 from fitting, and then avoids affecting cam 40 and rotate.
In the description of above-mentioned mode of execution, specific features, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
It is worth mentioning that, above-mentioned screen level degree regulating mechanism is not only applicable to screen (the firmly shielding) levelness adjusting projection display, is also applicable to adjust the screen level degree being arranged on other display unit on screen support body by the mode mounted.
The embodiment of the present invention additionally provides a kind of projection display, comprising: projector, with projector with the use of screen 10, and be located on the back side of screen 10, screen level degree regulating mechanism that technique scheme is carried.Adopt the screen level degree regulating mechanism carried of technique scheme, do not need screen to take off and can realize screen level degree and regulate, thus reduce dismounting step, improve regulated efficiency.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a screen level degree regulating mechanism, is characterized in that, comprising:
To be arranged on the screen back side and the benchmark piece that can be connected with screen support body pivotable;
Be arranged on the back shaft on the screen back side, and described back shaft and described benchmark piece are positioned at the both sides of the vertical center line of screen, described back shaft is provided with telescopic pawl assembly;
Rotating center is provided with the cam of axis hole, and the internal surface of described axis hole is equipped with multiple ratchet, and described cam is contained on described back shaft by described shaft hole sleeve, and each described ratchet and described pawl assembly form ratchet mechanism;
Be arranged on the dunnage on screen support body, the upper surface of described dunnage contacts to support described cam with the contoured surface of described cam.
2. screen level degree regulating mechanism according to claim 1, it is characterized in that, described back shaft is provided with radial direction through hole, described pawl assembly is arranged in described radial direction through hole, described pawl assembly comprises: be slidably mounted on two ratchets in described radial direction through hole, and is positioned at the spring that described radial direction through hole, two ends are connected with two described ratchets respectively; Wherein,
Two described ratchet one end stretch out described radial direction through hole respectively, and the external part of each described ratchet is provided with: be convenient to described cam around described back shaft one direction rotate domatic, and the step surface that stops described cam around described back shaft counter-rotation can be engaged with described ratchet.
3. screen level degree regulating mechanism according to claim 2, is characterized in that, be provided with guide rail in described radial direction through hole, two described ratchets is respectively equipped with the guiding groove with described guide rail.
4. screen level degree regulating mechanism according to claim 1, is characterized in that, described cam is eccentric wheel.
5. screen level degree regulating mechanism according to claim 4, it is characterized in that, described eccentric outer peripheral surface is arranged at intervals with multiple draw-in groove, and described screen level degree regulating mechanism also comprises: coordinate described eccentric wheel to use with the round nut type spanner making described eccentric wheel rotate around described back shaft.
6. screen level degree regulating mechanism according to claim 5, is characterized in that, described eccentric outer peripheral surface is provided with annular groove, and described multiple draw-in groove is located on the bottom surface of described annular groove.
7. screen level degree regulating mechanism according to claim 6, it is characterized in that, described dunnage is provided with the strip bulge stretched in described annular groove.
8. according to the arbitrary described screen level degree regulating mechanism of claim 1-7, it is characterized in that, also comprise connecting plate and cover plate, described back shaft is arranged on the screen back side by described connecting plate, described cover plate to cover on described connecting plate and is fixedly connected with described screen, and described cam is between described connecting plate and described cover plate.
9. screen level degree regulating mechanism according to claim 1, it is characterized in that, described benchmark piece is change gear, and described change gear is provided with positioning hole, when being mounted on screen support body by screen, described change gear is hung over by described positioning hole on the supporting post that is fixedly arranged on screen support body.
10. a projection display, is characterized in that, comprising: projector, with described projector with the use of screen, and to be located on the back side of described screen, as arbitrary in claim 1-9 as described in screen level degree regulating mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410717064.3A CN104455983B (en) | 2014-11-28 | 2014-11-28 | A kind of screen level degree adjusting mechanism and projection display equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410717064.3A CN104455983B (en) | 2014-11-28 | 2014-11-28 | A kind of screen level degree adjusting mechanism and projection display equipment |
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| CN104455983A true CN104455983A (en) | 2015-03-25 |
| CN104455983B CN104455983B (en) | 2016-03-30 |
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| CN104455983B (en) | 2016-03-30 |
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