CN2720482Y - Projection screen positioner - Google Patents
Projection screen positioner Download PDFInfo
- Publication number
- CN2720482Y CN2720482Y CN 200420082967 CN200420082967U CN2720482Y CN 2720482 Y CN2720482 Y CN 2720482Y CN 200420082967 CN200420082967 CN 200420082967 CN 200420082967 U CN200420082967 U CN 200420082967U CN 2720482 Y CN2720482 Y CN 2720482Y
- Authority
- CN
- China
- Prior art keywords
- steady arm
- core
- ball
- positioner
- projection screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
A projection screen positioner of the utility model relates to a positioning device which is arranged in a projection screen drum. The positioner is connected with a torsion spring assembly in a rotation pipe through an axis, and the positioner is composed of a box body, a positioner core, a ball and a self-locking spring. The positioner core is installed on a positioner axis, and the circumferential surface of the positioner core is provided with a ball groove on which a plurality of positioning grooves are provided. The inner wall of the box body is provided with an open ball groove along an axial direction, and the self-locking spring is sleeved on the positioner axis. The utility model has simple structure, convenient operation and reliable position. Simultaneously, the utility model can position optionally.
Description
Technical field:
The utility model projection screen steady arm relates to a kind of locating device that is arranged in the projection screen reel, particularly relates to a kind of locating device reliable, simple in structure of locating, and the utility model also can use in curtain, shutter door etc. has the locating device of reel.
Background technology:
Existing projection screen, normally curtain is wound on the reel, be provided with passive axle in the reel, axle two ends and support are fixed, torque spring is housed on the axle, torque spring one end is fixed on the axle, and the other end and reel are fixed, and its locator meams mainly contains two kinds, a kind of is that length-adjustable static line is set on the pull bar that screen is lifted one's head, when screen is pulled to when needing the position, with static line screen is fixed, make it can't backrush, this locator meams is because inconvenient operation, and influence attractive in appearancely, and seldom adopt, also have a kind of a kind of ratchet locating device that in reel, is provided with commonly used, because ratchet locating device noise in transmission is bigger, when the reel backrush, need bigger backrush power that reel is resetted, make reel structure become complicated.
The content of utility model:
For avoiding the deficiencies in the prior art part, the utility model purpose provides a kind of control projection screen can be parked in the optional position when drop-down, and the location is reliable, locating device simple in structure.
The utility model is realized by following technical measures: it is by trombone slide for a projection screen, curtain, the torque spring assembly, tube and shell are formed, trombone slide is connected an end of curtain, the other end of curtain is connected on the tube, under the effect of torque spring assembly, rotation by tube with the curtain backrush on tube, the pulling trombone slide can make curtain stretch downwards, in tube, be provided with the projection screen steady arm, steady arm is connected with torque spring assembly in the tube by axle, steady arm is by casing, locator core, ball, self-locking spring is formed, cylindrical locator core is installed on the steady arm axle, and cooperate with the between centers crack, have ball grooves on the periphery of locator core, ball grooves becomes 180 degree rotation symmetries with axis on cylindrical locator core, on ball grooves, be provided with several detents, have an opening ball grooves vertically on the inwall of casing, ball is arranged between the opening ball grooves of the ball grooves of locator core and cabinet wall, self-locking spring is enclosed within on the steady arm axle, one end of self-locking spring is fixed on the locator core by screw, casing by Bearing Installation on the steady arm axle, during work, pulling trombone slide 14 is pulled out curtain 15 downwards, casing also rotates together, the steady arm casing turns clockwise, casing drives in rotation process that ball in wall opening ball grooves rolls along the ball grooves on the locator core in it, ball moves axially along the opening ball grooves simultaneously, when ball is rolled on the ball grooves in certain detent, the ball device core that is positioned blocks, can't roll, make casing and tube also can't rotate, continue afterburning pulling screen trombone slide, locator core is rotated with casing and tube, locator core drives self-locking spring and turns clockwise on the steady arm axle, this moment, self-locking spring unclamped the steady arm axle, self-locking was lost efficacy, locator core fuses under the effect of ball clamping force, and rotate with tube, when curtain is pulled to a certain position and need locatees, stop drop-down, the steady arm self-locking spring shrinks, and locator core is fixed on the steady arm axle jointly, tube is under the effect of torque spring assembly restoring force, drive casing backrush together, casing drives ball in its opening ball grooves along ball grooves revolution and break away from original detent, is rolled in another detent, and the ball device core that is positioned blocks and can't roll, the steady arm axle, locator core and casing can't rotate, and finish the location.When needs withdrawal curtain, as long as use a external force, casing drive ball disengaging detent is made be rolled into the B place greater than torque spring, remove external force, casing is subjected to torque spring power drive ball not stop rotation along the B place, makes the smooth backrush of curtain.
The utility model is simple in structure and easy to operate, the location is reliable, can arbitrarily locate simultaneously, is fit to the different spaces place and uses.
Description of drawings:
Accompanying drawing 1 is the utility model assembly structure synoptic diagram.
Accompanying drawing 2 is the utility model casing cut-open view.
Accompanying drawing 3 is the utility model figure locator core synoptic diagram.
Shown in accompanying drawing 1 and accompanying drawing 2, it is by trombone slide for a projection screen, curtain, tube and shell are formed, trombone slide is connected an end of curtain, the other end of curtain is connected on the tube, rotation by tube with the curtain backrush on tube, the pulling trombone slide can make curtain stretch downwards, in tube, be provided with the projection screen steady arm, steady arm is by casing 1, locator core 3, ball 9, self-locking spring 4 is formed, steady arm is connected with torque spring assembly 12 in the tube by axle 8, locator core is cylindrical, be installed on the steady arm axle, and cooperate with the between centers crack, can sway, have ball grooves b on the periphery of locator core, ball grooves becomes 180 degree rotation symmetries with axis on cylindrical locator core, on ball grooves, be provided with several detents a, have an opening ball grooves 13 vertically on the inwall of casing, ball is arranged between the opening ball grooves of the ball grooves of locator core and cabinet wall, self-locking spring is enclosed within on the steady arm axle, one end of self-locking spring is fixed on the locator core by screw 10, casing is installed on the steady arm axle by bearing 2, the pulling trombone slide is pulled out curtain downwards, the steady arm casing turns clockwise, ball moves axially along opening ball grooves 13, in the time of in ball is rolled into last certain the detent a of ball grooves b, the ball device core that is positioned blocks, and locator core is rotated with casing and tube 11, and locator core drives self-locking spring and turns clockwise on the steady arm axle, when curtain is pulled to a certain position and need locatees, stop drop-downly, the steady arm self-locking spring is contracted on the steady arm axle, and self-locking spring is fixed steady arm axle and locator core, tube is under the effect of torque spring assembly restoring force, drive casing backrush together, ball is rolled to detent c along the ball grooves on the locator core, and the ball device core that is positioned blocks and can't roll, the steady arm axle, locator core and casing can't rotate, and finish the location.When needs withdrawal curtain, as long as use a external force, casing drive ball disengaging detent is made be rolled into the b place greater than torque spring, remove external force, casing is subjected to torque spring power drive ball not stop rotation along the b place, makes the smooth backrush of curtain.
As shown in Figure 2, have an opening ball grooves 13 vertically on the inwall of casing 1, ball is arranged between the opening ball grooves of the ball grooves of locator core and cabinet wall.
As shown in Figure 3, locator core 3 is cylindrical, can sway, and has ball grooves b on the periphery of locator core, and ball grooves becomes 180 degree rotation symmetries with axis on cylindrical locator core, be provided with several detents a on ball grooves.
Claims (4)
1, a kind of projection screen steady arm, steady arm is connected with torque spring assembly in the tube by axle, it is characterized in that steady arm is by casing, locator core, ball, self-locking spring is formed, locator core is installed on the steady arm axle, have ball grooves on the periphery of locator core, be provided with several detents on ball grooves, have an opening ball grooves vertically on the inwall of casing, ball is arranged between the open slot of the ball grooves of locator core and cabinet wall, self-locking spring is enclosed within on the steady arm axle, and an end of self-locking spring is fixed on the locator core.
2, projection screen steady arm according to claim 1 is characterized in that ball grooves becomes 180 degree rotation symmetries with axis on cylindrical locator core.
3, projection screen steady arm according to claim 1 is characterized in that locator core is cylindrical, and cooperates with the between centers crack.
4, projection screen steady arm according to claim 1 is characterized in that an end of self-locking spring is fixed on the locator core by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082967 CN2720482Y (en) | 2004-08-13 | 2004-08-13 | Projection screen positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082967 CN2720482Y (en) | 2004-08-13 | 2004-08-13 | Projection screen positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2720482Y true CN2720482Y (en) | 2005-08-24 |
Family
ID=35009440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420082967 Expired - Lifetime CN2720482Y (en) | 2004-08-13 | 2004-08-13 | Projection screen positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2720482Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792770A (en) * | 2014-02-10 | 2014-05-14 | 明基电通有限公司 | Locating ruler and support for projector and installation system and method for projector |
| CN110136491A (en) * | 2019-04-24 | 2019-08-16 | 安徽工程大学 | A kind of multimedia shadow proscenia of the audio-visual education programme convenient for teaching |
| CN114627586A (en) * | 2022-03-24 | 2022-06-14 | 深圳市索威尔科技开发有限公司 | Campus wisdom entrance guard's device with body temperature detection reports to police |
-
2004
- 2004-08-13 CN CN 200420082967 patent/CN2720482Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792770A (en) * | 2014-02-10 | 2014-05-14 | 明基电通有限公司 | Locating ruler and support for projector and installation system and method for projector |
| CN103792770B (en) * | 2014-02-10 | 2016-01-13 | 明基电通有限公司 | Projection arrangement Position Scale and support and projection arrangement installation system and method |
| CN110136491A (en) * | 2019-04-24 | 2019-08-16 | 安徽工程大学 | A kind of multimedia shadow proscenia of the audio-visual education programme convenient for teaching |
| CN114627586A (en) * | 2022-03-24 | 2022-06-14 | 深圳市索威尔科技开发有限公司 | Campus wisdom entrance guard's device with body temperature detection reports to police |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140813 Granted publication date: 20050824 |