CN203384170U - Loosening-stroke-limited locking device and leg tube of photography tripod - Google Patents
Loosening-stroke-limited locking device and leg tube of photography tripod Download PDFInfo
- Publication number
- CN203384170U CN203384170U CN201320306802.6U CN201320306802U CN203384170U CN 203384170 U CN203384170 U CN 203384170U CN 201320306802 U CN201320306802 U CN 201320306802U CN 203384170 U CN203384170 U CN 203384170U
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- China
- Prior art keywords
- locking device
- threaded sleeve
- locking
- pipe
- ring
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- Expired - Fee Related
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses a loosening-stroke-limited locking device and a leg tube of a photography tripod. The loosening-stroke-limited locking device comprises a threaded sleeve, a locking knob, a limiting part and a check ring, a limiting shoulder is arranged on the inner wall of the threaded sleeve, and an outer positioning groove is formed in the outer wall of the threaded sleeve. The locking knob is in thread fit with the threaded sleeve, and an inner positioning groove opposite to the outer positioning groove is formed in the inner wall of the locking knob. The limiting part is mounted in an accommodating cavity encircled by the inner and outer positioning grooves in an up-down movable manner, the lower edge of the outer positioning groove can contact with the bottom surface of the limiting part, and the upper edge of the inner positioning groove is in contact with the top surface of the limiting part during loosening. The check ring is mounted between the limiting shoulder and a closing edge of the tail end of the locking knob. When the locking device is in the locking state, the top surface and the bottom surface of the check ring are butted against the bottom surface of the limiting shoulder and the inner surface of the closing edge respectively. If an operator is incapable of continuing rotating during loosening, loosening is finished, and only reverse screwing action can be performed at the moment.
Description
Technical field
The utility model relates to a kind of locking device that two pipe fittings are locked together, this kind of locking device is applicable to being applied to the photographic goods field, relating in particular to is a kind ofly can limit the turn amount while by the knob mode, loosening locking device, i.e. the locking device of stroke is loosened in restriction; In addition, the utility model also relates to this kind of locking device linkage structure in use.
Background technique
At present, the structure that the locking device that two pipe fittings that are nested together are locked together is normally locked and loosened by turn-knob, this kind of locking device do not have fixed position when loosening, cause turn-knob to complete while loosening, possible operation personnel still think and also do not unclamp, in this kind of situation, may make operator be hard to tell locking and loosen direction after unclamping locking device, bring the trouble in a lot of uses to operator, this kind of problem just is present in the locking device between the upper, lower tube of pin pipe of photographic tripod.
The model utility content
A kind of purpose of the present utility model is to provide a kind of locking device that loosens stroke limiting, and this kind locking device can by making operator can't continue the turn locking device, alert completes and loosens.
The technical solution adopted in the utility model is: a kind of locking device that loosens stroke limiting comprises:
Threaded sleeve, be provided with spacing shoulder on the inwall of described threaded sleeve, described threaded sleeve is provided with the internal thread for being connected with upper pipe thread that is positioned at spacing shoulder top; Be provided with a circle outside fix groove on the outer wall of described threaded sleeve; The outer wall of the described threaded sleeve below of positioning groove outside is formed with outside thread;
Locking knob, described locking knob is connected with the outside thread screw-thread fit of threaded sleeve by the knob internal thread arranged on its inwall, the inwall of described locking knob is provided with the interior positioning groove relative with the outside fix groove above the knob internal thread, and described locking knob is inwardly retracted and formed the closing in edge endways;
Bounding means, described bounding means can be installed on up or down by the interior positioning groove holding cavity surrounded relative to the outside fix groove, the height of described holding cavity is greater than the height of bounding means, the relative position of described inside and outside positioning groove and bounding means is required to meet following relation: the lower edge of described outside fix groove can contact with the bottom surface of bounding means, and the upper edge of described interior positioning groove will contact with the end face of bounding means when loosening; And,
The back-up ring be fastenedly connected for the outer wall with lower pipe, described back-up ring is installed between the closing in edge of the spacing shoulder of threaded sleeve and locking knob, the size requirement of described back-up ring is: at locking device during in locking state, the end face of back-up ring and bottom surface respectively with the contacted inner surfaces at bottom surface and the closing in edge of spacing shoulder.
Preferably, the end face of the bottom surface of described spacing shoulder and back-up ring forms the inclined-plane cooperatively interacted.
Preferably, the internal surface at the bottom surface of described back-up ring and closing in edge forms the inclined-plane cooperatively interacted.
Preferably, described bounding means is the open limited ring with construction opening.
Preferably, be arranged with the service portion that applies turn power for operator on the outer wall of described locking knob.
Preferably, described locking device also have between the top of top outside the top that closely is sheathed on threaded sleeve and that be squeezed in locking knob and threaded sleeve for sealing the dirt-proof boot of described holding cavity.
Preferably, the circle holding flange that the top of described threaded sleeve extends radially outward, be provided with the sealing road suitable with holding flange on the inwall of described dirt-proof boot.
Preferably, the inboard on the top of described locking knob forms the inclined-plane acted on mutually with dirt-proof boot.
Preferably, described back-up ring is the Open architecture with construction opening.
Another purpose of the present utility model is to provide a kind of pin pipe that adopts the photographic tripod of above-mentioned locking device.
The technological scheme of the utility model sampling is: a kind of pin pipe of photographic tripod, comprise pipe, be sheathed on lower pipe and the locking device that is connected pipe and lower pipe in pipe, described locking device is the above-mentioned locking device that loosens stroke limiting, described threaded sleeve is connected by pipe thread on internal thread and, once pipe penetrates in described upper pipe, and described back-up ring closely is sheathed on the outer wall of lower pipe.
The beneficial effects of the utility model are: locking device of the present utility model, by being set, holding cavity and bounding means can limit the maximum downstream displacement of bounding means, stroke is loosened in i.e. restriction, therefore, operator are when loosening, can know and complete and loosen if can't continue the turn locking knob, and because under the state loosened fully, carrying out the reciprocal action that screws, so operator are easy to be informed in the locking of unclamping after locking device and loosen direction.Above restriction is loosened the structure of stroke now when loosening locking knob, the upper edge of its outside fix groove will drive the descending until lower edge of the interior positioning groove of the bottom surface of bounding means and threaded sleeve of bounding means and can't continue to move down after offseting, and now locking knob contacts with the end face of bounding means because of the upper edge of its outside fix groove, can't continue by turn.
The accompanying drawing explanation
Fig. 1 shows the decomposing schematic representation that loosens the locking device of stroke limiting according to of the present utility model;
Fig. 2 shows the sectional view according to the linkage structure of the pin pipe of photographic tripod of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
As illustrated in fig. 1 and 2, a kind of locking device that loosens stroke limiting of the utility model comprises threaded sleeve 4, locking knob 3, bounding means 6 and back-up ring 5.Be provided with spacing shoulder 41 on the inwall of this threaded sleeve 4, threaded sleeve 4 is provided with the internal thread for being connected with upper pipe 1 screw-thread fit that is positioned at spacing shoulder 41 tops, in the present embodiment, till the internal thread of threaded sleeve 4 arrives the end face of limit dais shoulder 41 always, like this, this spacing shoulder 41 also can play the effect of supporting upper pipe 1; Be provided with a circle outside fix groove on the outer wall of threaded sleeve 4, and threaded sleeve is formed with outside thread in the below of positioning groove outside.This locking knob 3 is connected with the outside thread screw-thread fit of threaded sleeve 4 by the knob internal thread arranged on its inwall, the inwall of locking knob 3 is provided with the interior positioning groove relative with the outside fix groove above the knob internal thread, and locking knob 3 is inwardly retracted and formed the closing in edge endways.This bounding means 6 is moving up and down to be installed on by the interior positioning groove holding cavity 9 surrounded relative to the outside fix groove, the height of this holding cavity 9 is greater than the height of bounding means 6, be that bounding means 6 can move up and down within the specific limits, in, the relative position of outside fix groove and bounding means is required to meet following relation: the lower edge 4-1 of outside fix groove can contact with the bottom surface 6-2 of bounding means 6, limit the maximum downstream position of bounding means 6 with this, the upper edge 3-1 of interior positioning groove will contact with the end face 6-1 of bounding means 6 when loosening, maximum downstream position with this by bounding means 6 restriction locking knobs 3, it is maximum release position.Back-up ring 5 is fastenedly connected for the outer wall with lower pipe 2, it is installed between the closing in edge of the spacing shoulder 41 of threaded sleeve 4 and locking knob 3, the size requirement of this back-up ring 5 is: at locking device 3, during in locking state, the end face of back-up ring 5 and bottom surface offset with the bottom surface 4-2 of spacing shoulder 41 and the internal surface 3-2 at closing in edge respectively.
In order to realize cooperatively interacting of each assembly, as shown in Figure 2, the bottom surface 4-2 of this spacing shoulder 41 and the end face of back-up ring 5 can form the inclined-plane cooperatively interacted; The internal surface 3-2 at the bottom surface of this back-up ring 5 and closing in edge can form the inclined-plane cooperatively interacted.
For bounding means 6 is installed in holding cavity 9 easily, as shown in Figure 1, this bounding means 6 can be the open limited ring with construction opening.
For the ease of operator's turn locking knob 3, can be on the outer wall of the locking knob 3 sheathed service portion 8 that applies turn power for operator, for example this service portion 8 can be along a plurality of axially extended effect ribs along locking knob of circumferentially having of the central shaft around locking knob, this effect rib can be provided with a pair of effect fin that tilts and tilt to counter clockwise direction to clockwise direction respectively, so that counterclockwise and clockwise turn locking knob 3.
This locking device also can arrange a dirt-proof boot 7 for sealing holding cavity 9 closely be sheathed between the top of top outside the top of threaded sleeve 4 and that be located in locking knob 3 and threaded sleeve 4, wherein, " closely sheathed " refers to that dirt-proof boot 7 passes through its elasticity lock ring on the outer wall of threaded sleeve 4, makes to form sealing pair between dirt-proof boot 7 and locking knob 3.For the ease of realizing the sealing between dirt-proof boot 7 and locking knob 3, the top of this threaded sleeve 4 can extend radially outward a circle holding flange 42, be provided with the sealing road suitable with holding flange 42 on the inwall of dirt-proof boot 7, form the structure of similar knife-edge sealing between the two.And the inboard on the top of locking knob 3 can form the inclined-plane of realizing the sealing of 7 of locking knob 3 and dirt-proof boots by extruding dirt-proof boot 7.
For the ease of back-up ring 5 being installed on lower pipe 2, as shown in Figure 1, this back-up ring 5 is for can be the Open architecture with construction opening.
As illustrated in fig. 1 and 2, the pin pipe of photographic tripod of the present utility model comprises pipe 1, is sheathed on lower pipe 2 and the locking device that loosens stroke limiting that is connected pipe and lower pipe in pipe 1, the threaded sleeve 4 of locking device is connected with upper pipe 1 screw-thread fit by internal thread, and back-up ring 5 closely is sheathed on the outer wall of lower pipe, " closely " finger stop circle 5 herein limits the two relative sliding and is fixedly connected with rotationally with 2 of lower pipes.When back-up ring 5 samplings have the Open architecture of construction opening, by adopting the back-up ring of suitable dimension, the elastically-deformable ability produced while recovering to install by it can be bound round on lower pipe 2; In addition, back-up ring 5 also can pass the counter sink and the cooperation of the tapped hole on lower pipe 2 that are arranged on back-up ring 5 by screw and realize the fixing of the two.
The foregoing is only preferably mode of execution of the utility model, not be used for limiting practical range of the present utility model, the equivalence of in every case doing in protection domain of the present utility model changes and modifies, and all should think and fall in protection domain of the present utility model.
Claims (10)
1. a locking device that loosens stroke limiting, is characterized in that, comprising:
Threaded sleeve, be provided with spacing shoulder on the inwall of described threaded sleeve, described threaded sleeve is provided with the internal thread for being connected with upper pipe thread that is positioned at spacing shoulder top; Be provided with a circle outside fix groove on the outer wall of described threaded sleeve; The outer wall of the described threaded sleeve below of positioning groove outside is formed with outside thread;
Locking knob, described locking knob is connected with the outside thread screw-thread fit of threaded sleeve by the knob internal thread arranged on its inwall, the inwall of described locking knob is provided with the interior positioning groove relative with the outside fix groove above the knob internal thread, and described locking knob is inwardly retracted and formed the closing in edge endways;
Bounding means, described bounding means can be installed on up or down by the interior positioning groove holding cavity surrounded relative to the outside fix groove, the height of described holding cavity is greater than the height of bounding means, the relative position of described inside and outside positioning groove and bounding means is required to meet following relation: the lower edge of described outside fix groove can contact with the bottom surface of bounding means, and the upper edge of described interior positioning groove will contact with the end face of bounding means when loosening; And,
The back-up ring be fastenedly connected for the outer wall with lower pipe, described back-up ring is installed between the closing in edge of the spacing shoulder of threaded sleeve and locking knob, the size requirement of described back-up ring is: at locking device during in locking state, the end face of back-up ring and bottom surface respectively with the contacted inner surfaces at bottom surface and the closing in edge of spacing shoulder.
2. locking device according to claim 1, is characterized in that, the bottom surface of described spacing shoulder and the end face of back-up ring form the inclined-plane cooperatively interacted.
3. locking device according to claim 1, is characterized in that: the inclined-plane that the internal surface formation at the bottom surface of described back-up ring and closing in edge cooperatively interacts.
4. locking device according to claim 1, it is characterized in that: described bounding means is the open limited ring with construction opening.
5. locking device according to claim 1, is characterized in that: be arranged with the service portion that applies turn power for operator on the outer wall of described locking knob.
6. locking device according to claim 1 is characterized in that: also have between the top of top outside the top that closely is sheathed on threaded sleeve and that be squeezed in locking knob and threaded sleeve for sealing the dirt-proof boot of described holding cavity.
7. locking device according to claim 6 is characterized in that: the circle holding flange that the top of described threaded sleeve extends radially outward is provided with the sealing road suitable with holding flange on the inwall of described dirt-proof boot.
8. locking device according to claim 7, is characterized in that: the inclined-plane that inboard formation and the dirt-proof boot on the top of described locking knob acts on mutually.
9. locking device according to claim 1, it is characterized in that: described back-up ring is the Open architecture with construction opening.
10. the pin pipe of a photographic tripod, comprise pipe, be sheathed on lower pipe and the locking device that is connected pipe and lower pipe in pipe, it is characterized in that: described locking device is according to the described locking device that loosens stroke limiting of any one in claim 1 to 9, described threaded sleeve is connected by pipe thread on internal thread and, once pipe penetrates in described upper pipe, and described back-up ring closely is sheathed on the outer wall of lower pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320306802.6U CN203384170U (en) | 2013-05-30 | 2013-05-30 | Loosening-stroke-limited locking device and leg tube of photography tripod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320306802.6U CN203384170U (en) | 2013-05-30 | 2013-05-30 | Loosening-stroke-limited locking device and leg tube of photography tripod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203384170U true CN203384170U (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320306802.6U Expired - Fee Related CN203384170U (en) | 2013-05-30 | 2013-05-30 | Loosening-stroke-limited locking device and leg tube of photography tripod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203384170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475976A (en) * | 2016-11-08 | 2017-03-08 | 宜宾市南溪区科诚机电厂 | Ready-package high intensity pipe sleeve joint device |
-
2013
- 2013-05-30 CN CN201320306802.6U patent/CN203384170U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475976A (en) * | 2016-11-08 | 2017-03-08 | 宜宾市南溪区科诚机电厂 | Ready-package high intensity pipe sleeve joint device |
| CN106475976B (en) * | 2016-11-08 | 2024-02-27 | 宜宾市南溪区科民机电有限公司 | Quick-assembling high-strength round tube sleeving device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20200530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |