CN103744261A - Self-locking structure for screen - Google Patents
Self-locking structure for screen Download PDFInfo
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- CN103744261A CN103744261A CN201410025520.8A CN201410025520A CN103744261A CN 103744261 A CN103744261 A CN 103744261A CN 201410025520 A CN201410025520 A CN 201410025520A CN 103744261 A CN103744261 A CN 103744261A
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- screen
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- steel ball
- rotating shaft
- connecting portion
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Abstract
The invention relates to a self-locking structure for a screen. The self-locking structure comprises a rotating shaft one end of which is provided with a screen connecting part, a steel ball guide rail is fixedly sleeved on the rotating shaft; the steel ball guide rail is provided with a first rail; the first rail comprises a downward pull rail groove formed in the outer surface of the steel ball guide rail and a limit rail groove; the downward pull rail groove is arranged close to the screen connecting part; the rotating shaft is sleeved with a shell in a rotating way; the shell is provided with a cavity capable of movably accommodating the steel ball guide rail; a second rail is concavely arranged on the inner wall of the cavity along the axis direction of the rotating shaft; steel balls are movably mounted on the first rail and the second rail; a first connection part used for fixedly mounting a screen spring is arranged on one end, far away from the screen connecting part, of the shell; the other end of the rotating shaft penetrates through and stretches out of the shell to form a second connecting part. The self-locking structure of the screen is unique in structure, the rapid self-locking is realized under the counter-acting force effect of the screen spring after the screen is pulled down, the self-locking stability is stronger, the convenience and rapidness in use are improved, and the production cost is lower.
Description
Technical field
The present invention relates to a kind of self-locking head structure for screen, specifically refer to a kind of for realizing the self-locking head structure of screen fast self-locking when drop-down.
Background technology
Screen is commonly used to do the purposes such as teaching demonstration, motion picture projection, along with social development, screen also develops into one of requisite office appliance of enterprises gradually, and the product of screen is simultaneously also gradually towards light, theory development efficiently, and automaticity is also more and more higher.
In order to meet people's routine use, carry and install the convenience of depositing, screen product is made into the form of rotatable contraction rolling conventionally, and drop-down expansion in use forms screen, the screen of this form simultaneously also can reduce the accidental injury when not using, and applies comparatively extensive.Traditional screen product need to be used screen spring conventionally for this reason, and the critical piece that screen spring is screen is the propulsion system that screen can be shunk automatically.
In order further to promote people's convenience in use, conventionally at the beginning of the design of screen product, just put forward the theory of fast self-locking, need to guarantee that screen product is when pulling down to the size of demand, due to the existence of the reacting force of screen spring, the maintenance that the screen of formation can be stable.
For realizing the theory of above-mentioned fast self-locking, the screen product of traditional screen form of springs is often designed with manual stop means, fixing after keeping screen drop-down by the spacing form of armstrong's patent, the mode of this manual locking is comparatively backward undoubtedly, and convenience is poor.Some new screen products are designed to again other multiple self-locking form simultaneously, the self-locking structure of for example gear forms, but the principle of this self-locking structure is often too complicated; The for example self-locking structure of electric motor control, but the less stable of this self-locking structure.The screen product of these new self-locking structure forms, production cost is conventionally higher, and the therefore screen product of these self-locking forms is not comparatively desirable selection.
Summary of the invention
In order to seek more outstanding settling mode, when guaranteeing convenience demand, the version of traditional screen spring is made to further improvement, promote its convenience, be undoubtedly best selection.
The object of the invention is to overcome the problem of above-mentioned prior art, a kind of self-locking head structure for screen is provided, its structure uniqueness, can realize screen drop-down after fast self-locking under screen spring reaction power, self-locking stability is stronger, thereby improves property easy to use, and production cost is lower simultaneously.
Above-mentioned purpose is to be achieved through the following technical solutions:
A kind of self-locking head structure for screen, comprise that one end has the rotating shaft of screen connecting portion, in described rotating shaft, fixed cover is provided with steel ball guide rail, described steel ball guide rail has the first track, described the first track comprises the drop-down rail groove and the limit track groove that are positioned at described steel ball guide rail outside surface, described drop-down rail groove arranges near described screen connecting portion, in described rotating shaft, be rotatably arranged with shell, described shell has activity accommodates the cavity of described steel ball guide rail, the inwall of described cavity is concaved with the second track along the axis direction of described rotating shaft, described the first track and described the second track are movably installed with steel ball, described shell has the first connecting portion for fixedly mounting screen spring away from one end of described screen connecting portion, the other end of described rotating shaft runs through and extends described shell and forms the second connecting portion.
Due to the form of screen employing spool rolling, for the ease of being connected with the spool of screen, described screen connecting portion is square toes.
Shell and the rotating shaft form of being rotatably connected have multiple, such as two ends all adopt the form of bearing.But in order to save cost and weight reduction, simultaneously also for the ease of the installation of shell, preferably, described shell is arranged in described rotating shaft by bearing near one end of described screen connecting portion.
In order better to realize the location and installation of steel ball guide rail, described rotating shaft has installation portion, steel ball guide rail also has more implementation with being connected of installation portion, but object for the ease of removing and installing, described steel ball guide rail is movably set on described installation portion, described steel ball guide rail is fixedly connected with torsion spring away from one end sidepiece of described screen connecting portion by screw, and described torsion spring relies on the reliable fixed cover of self torsion to be located on described installation portion.
Owing to only having adopted bearing in one end of shell, in order to keep the stability of the other end when rotating shaft is rotated, in described rotating shaft, be close to described installation portion fixed cover pad is housed, interfere the motion of rotating shaft simultaneously for fear of pad, described shell has the groove with described pad clearance fit.
In order to guarantee the drop-down smoothly of screen, owing to having adopted the form of steel ball motion, the design of drop-down rail groove need to rely on the structure of self to realize the smooth motion of steel ball, therefore drop-down track needs optimal design further, preferably, described drop-down rail groove comprises two the main motion grooves of continuous connector loop around described steel ball guide rail outside surface, described main motion groove comprises the forward arc introduction segment being connected successively along the drop-down direction of motion of described steel ball, the forward section of seamlessly transitting and forward arc are derived section, described forward arc introduction segment and described forward arc are derived the roughly equal and opposite direction of the radian of section, described screen connecting portion is partial in the radian direction introversion of described forward arc introduction segment.Two main motion grooves are connected the mode of design continuously, coordinate the period of motion while contributing to shorten steel ball fast self-locking with the design of the limit track groove of the following stated.
For realize screen drop-down after fast self-locking under screen spring reaction power, adapt with the design of above-mentioned main motion groove simultaneously, described limit track groove is arranged on the side of described drop-down rail groove away from described screen connecting portion, described limit track groove comprises corresponding with described main motion groove respectively main stopper slot, described main stopper slot comprises the reverse arc introduction segment of mutual linking, reverse transition section, screens section, forward is derived section and the reverse section that turns out, the corresponding described forward arc of reverse sourcing mouth of described reverse arc introduction segment is derived section, the described reverse reverse corresponding described forward section of seamlessly transitting of outlet that turns that turns out section.
In order to guarantee dirigibility and the stability of steel ball motion, between described steel ball guide rail and the inwall of described cavity, there is gap, described the second track is semi-circular groove structure, the groove radius of described the second track is slightly larger than the radius of steel ball.
Described the first connecting portion is external thread.Externally threaded version is convenient to realize the installing/dismounting of screen spring, when mounted, one end of screen spring is fixedly connected with shell, the other end of screen spring is fixedly connected with the second connecting portion of rotating shaft by direct or indirect mode, thereby when rotating shaft contractile motion, provide snap back acting force, realize automatically and shrinking, the spring of screen simultaneously also contributes to when drop-down motion too fierce.
A kind of self-locking head structure for screen of the present invention, comprise that one end has the rotating shaft of screen connecting portion, in rotating shaft, fixed cover is provided with steel ball guide rail, steel ball guide rail has the first track, the first track comprises the drop-down rail groove and the limit track groove that are positioned at steel ball guide rail outside surface, drop-down rail groove arranges near screen connecting portion, in rotating shaft, be rotatably arranged with shell, shell has activity accommodates the cavity of steel ball guide rail, the inwall of cavity is concaved with the second track along the axis direction of rotating shaft, the first track and the second track are movably installed with steel ball, shell has the first connecting portion for fixedly mounting screen spring away from one end of screen connecting portion, the other end of rotating shaft runs through and extends shell and forms the second connecting portion.The self-locking head structure for screen of this structure, its structure uniqueness, has realized the fast self-locking under screen spring reaction power after screen is drop-down, and self-locking stability is stronger, thereby has improved property easy to use, and production cost is lower simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of screen in application in the present invention's one specific embodiment;
Fig. 2 is a kind of installation site schematic diagram of applying in screen for the self-locking head structure of screen of the present invention;
Fig. 3 is the stereographic map of a kind of self-locking head structure one specific embodiment for screen of the present invention;
Fig. 4 is the structural representation of Fig. 3 shaft;
Fig. 5 is the stereographic map at Fig. 3 housing the first visual angle;
Fig. 6 is the stereographic map at Fig. 3 housing the second visual angle;
Fig. 7 removes the cut-away view after shell in Fig. 3;
Fig. 8 is the stereo amplification figure at steel ball guide rail the second visual angle in Fig. 7;
Fig. 9 is the stereo amplification figure at steel ball guide rail the first visual angle in Fig. 7.
Embodiment
According to drawings and embodiments the present invention is described in further detail below.
For convenient, understand and set forth the specific embodiment of the present invention, in the downdraw process of screen, be generally understood as employing as shown in Figure 1 comparatively common counterclockwise forward a rotate the mode of drop-down screen b, the demonstration audient c of screen is arranged in the left side of Fig. 1 screen b.
Shown in Fig. 2, when demonstrating audient c just to screen b, a kind of self-locking head structure 100 for screen of the present invention is arranged on the one end, left side that is positioned at screen spool d.
As Fig. 3, Fig. 5 and Fig. 7, Fig. 8, shown in Fig. 9, a kind of self-locking head structure 100 for screen described in the embodiment of the present invention, comprise that one end has the rotating shaft 10 of screen connecting portion 11, in rotating shaft 10, fixed cover is provided with steel ball guide rail 20, steel ball guide rail 20 has the first track 21, the first track 21 comprises the drop-down rail groove 22 and the limit track groove 23 that are positioned at steel ball guide rail 20 outside surfaces, drop-down rail groove 22 arranges near screen connecting portion 11, in rotating shaft 10, be rotatably arranged with shell 30, shell 30 has activity accommodates the cavity 31 of steel ball guide rail 20, the inwall of cavity 31 is concaved with the second track 32 along the axis direction of rotating shaft, the first track 21 and the second track 32 are movably installed with steel ball 40, shell 30 has the first connecting portion 33 for fixedly mounting screen spring (not shown) away from one end of screen connecting portion 11, the other end of rotating shaft 10 runs through and extends shell 30 and forms the second connecting portion 12.
Shown in Fig. 3, Fig. 4, screen connecting portion 11 is square toes.Shown in Fig. 5, Fig. 6, the first connecting portion 33 is external thread.Shown in Fig. 1, Fig. 7, shell 30 is arranged in rotating shaft 10 by bearing 50 near one end of screen connecting portion 11.
Shown in Fig. 4, Fig. 7, rotating shaft 10 has installation portion 13, steel ball guide rail 20 is movably set on installation portion 13, steel ball guide rail 20 is fixedly connected with torsion spring 60 away from one end sidepiece of screen connecting portion 11 by screw (not shown), and torsion spring 60 relies on the reliable fixed cover of self torsion to be located on installation portion 13.In rotating shaft 10, be close to installation portion 13 fixed covers pad 70 is housed, shown in Fig. 6, shell 30 has the groove 34 with pad 70 clearance fit.
Shown in Fig. 1, Fig. 7 to Fig. 9, drop-down rail groove 22 comprises two the main motion groove 22as of continuous connector loop around steel ball guide rail 20 outside surfaces, main motion groove 22a comprises the forward arc introduction segment 221, the forward section of seamlessly transitting 222 and the forward arc derivation section 223 that are connected successively along the drop-down direction of motion of steel ball, forward arc introduction segment 221 and forward arc are derived the roughly equal and opposite direction of the radian of section 223, and screen connecting portion 11 is partial in the radian direction introversion of forward arc introduction segment 221.
Between the inwall of steel ball guide rail 20 and cavity 31, have gap, the second track 32 is semi-circular groove structure, and the groove radius of the second track 32 is slightly larger than the radius of steel ball 40.The first connecting portion 33 is external thread.Externally threaded version is convenient to realize the installing/dismounting of screen spring, when mounted, one end of screen spring is fixedly connected with shell, the other end of screen spring is fixedly connected with the second connecting portion of rotating shaft by direct or indirect mode, thereby when rotating shaft campaign, provide snap back acting force, realize automatically and shrinking, the spring of screen simultaneously also contributes to when drop-down motion too fierce.
The foregoing is only explanation embodiments of the present invention; be not limited to the present invention, for a person skilled in the art, within the spirit and principles in the present invention all; any modification of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (9)
1. the self-locking head structure for screen, it is characterized in that, comprise that one end has the rotating shaft of screen connecting portion, in described rotating shaft, fixed cover is provided with steel ball guide rail, described steel ball guide rail has the first track, described the first track comprises the drop-down rail groove and the limit track groove that are positioned at described steel ball guide rail outside surface, described drop-down rail groove arranges near described screen connecting portion, in described rotating shaft, be rotatably arranged with shell, described shell has activity accommodates the cavity of described steel ball guide rail, the inwall of described cavity is concaved with the second track along the axis direction of described rotating shaft, described the first track and described the second track are movably installed with steel ball, described shell has the first connecting portion for fixedly mounting screen spring away from one end of described screen connecting portion, the other end of described rotating shaft runs through and extends described shell and forms the second connecting portion.
2. the self-locking head structure for screen as claimed in claim 1, is characterized in that, described screen connecting portion is square toes.
3. the self-locking head structure for screen as claimed in claim 2, is characterized in that, described shell is arranged in described rotating shaft by bearing near one end of described screen connecting portion.
4. the self-locking head structure for screen as claimed in claim 3, it is characterized in that, described rotating shaft has installation portion, described steel ball guide rail is movably set on described installation portion, described steel ball guide rail is fixedly connected with torsion spring away from one end sidepiece of described screen connecting portion by screw, and described torsion spring relies on the reliable fixed cover of self torsion to be located on described installation portion.
5. the self-locking head structure for screen as claimed in claim 4, is characterized in that, is close to described installation portion fixed cover pad is housed in described rotating shaft, and described shell has the groove with described pad clearance fit.
6. the self-locking head structure for screen as claimed in claim 5, it is characterized in that, described drop-down rail groove comprises two the main motion grooves of continuous connector loop around described steel ball guide rail outside surface, described main motion groove comprises the forward arc introduction segment, the forward section of seamlessly transitting and the forward arc derivation section that are connected successively along the drop-down direction of motion of described steel ball, described forward arc introduction segment and described forward arc are derived the roughly equal and opposite direction of the radian of section, and described screen connecting portion is partial in the radian direction introversion of described forward arc introduction segment.
7. the self-locking head structure for screen as claimed in claim 6, it is characterized in that, described limit track groove is arranged on the side of described drop-down rail groove away from described screen connecting portion, described limit track groove comprises corresponding with described main motion groove respectively main stopper slot, described main stopper slot comprises the reverse arc introduction segment of mutual linking, reverse transition section, screens section, forward is derived section and the reverse section that turns out, the corresponding described forward arc of reverse sourcing mouth of described reverse arc introduction segment is derived section, the described reverse reverse corresponding described forward section of seamlessly transitting of outlet that turns that turns out section.
8. the self-locking head structure for screen as claimed in claim 7, is characterized in that, between described steel ball guide rail and the inwall of described cavity, has gap, and described the second track is semi-circular groove structure, and the groove radius of described the second track is slightly larger than the radius of steel ball.
9. the self-locking head structure for screen as claimed in claim 8, is characterized in that, described the first connecting portion is external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025520.8A CN103744261B (en) | 2014-01-20 | 2014-01-20 | A kind of self-locking head structure for screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025520.8A CN103744261B (en) | 2014-01-20 | 2014-01-20 | A kind of self-locking head structure for screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103744261A true CN103744261A (en) | 2014-04-23 |
| CN103744261B CN103744261B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410025520.8A Active CN103744261B (en) | 2014-01-20 | 2014-01-20 | A kind of self-locking head structure for screen |
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| CN (1) | CN103744261B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02232492A (en) * | 1989-03-04 | 1990-09-14 | Metako:Kk | Roll screen device |
| JP2006113177A (en) * | 2004-10-13 | 2006-04-27 | Kinki Education Center:Kk | Screen take-up device for projection screen or the like |
| CN101634803A (en) * | 2008-07-22 | 2010-01-27 | 苏州璨宇光学有限公司 | Projection screen device |
| TWI381241B (en) * | 2008-07-11 | 2013-01-01 | Aixin Technologies Llc | Projection screen apparatus |
| CN202900017U (en) * | 2012-10-22 | 2013-04-24 | 梁焯雄 | Roller reduction gear and automatic rolling-type curtain or window screen thereof |
| TWI395050B (en) * | 2008-05-20 | 2013-05-01 | Coretronic Suzhou Corp | Projection screen apparatus |
| CN203688981U (en) * | 2014-01-20 | 2014-07-02 | 蔡兆和 | Self-locking head structure used for screen |
-
2014
- 2014-01-20 CN CN201410025520.8A patent/CN103744261B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02232492A (en) * | 1989-03-04 | 1990-09-14 | Metako:Kk | Roll screen device |
| JP2006113177A (en) * | 2004-10-13 | 2006-04-27 | Kinki Education Center:Kk | Screen take-up device for projection screen or the like |
| TWI395050B (en) * | 2008-05-20 | 2013-05-01 | Coretronic Suzhou Corp | Projection screen apparatus |
| TWI381241B (en) * | 2008-07-11 | 2013-01-01 | Aixin Technologies Llc | Projection screen apparatus |
| CN101634803A (en) * | 2008-07-22 | 2010-01-27 | 苏州璨宇光学有限公司 | Projection screen device |
| CN202900017U (en) * | 2012-10-22 | 2013-04-24 | 梁焯雄 | Roller reduction gear and automatic rolling-type curtain or window screen thereof |
| CN203688981U (en) * | 2014-01-20 | 2014-07-02 | 蔡兆和 | Self-locking head structure used for screen |
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| Publication number | Publication date |
|---|---|
| CN103744261B (en) | 2016-06-29 |
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