CN106763076B - A kind of screw structural - Google Patents
A kind of screw structural Download PDFInfo
- Publication number
- CN106763076B CN106763076B CN201710086458.7A CN201710086458A CN106763076B CN 106763076 B CN106763076 B CN 106763076B CN 201710086458 A CN201710086458 A CN 201710086458A CN 106763076 B CN106763076 B CN 106763076B
- Authority
- CN
- China
- Prior art keywords
- knob part
- screw
- hole portion
- strip
- screw rod
- 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.)
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Links
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 29
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/06—Specially-shaped heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0038—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/048—Specially-shaped necks
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Prostheses (AREA)
Abstract
The present invention relates to array substrate prosthetic appliance more particularly to a kind of screw structurals for stationary mirror substrate.Screw structural proposed by the present invention, including the screw ontology with nut and screw rod；The strip being fixed on screw rod and the knob part being set on screw rod.Knob part can moving axially with respect to screw ontology along screw rod, when knob part is moved to clamped position, be mutually clamped with strip, the outer surface of knob part is provided with knurling structure, after knob part engages with strip, passes through knurling structure driving screws ontology.Knob part of the invention is set on screw rod and will not be detached from from screw ontology, so being not in the phenomenon that knob part slides or loses, avoid security risk, after knurling structure is arranged in the outer surface of knob part, so that the frictional force of knob part outer surface increases, manual driving screws ontology is realized.
Description
Technical field
The present invention relates to array substrate prosthetic appliance more particularly to a kind of screw structurals for stationary mirror substrate.
Background technique
It in liquid crystal display manufacturing technology field, generally requires to repair problematic array substrate, repairs array
When substrate, need using array substrate prosthetic appliance.The reflecting mirror for generating optical path on prosthetic appliance is fixed on substrate,
Substrate is fixed on the base by the fixed screw of four edges, when needing to adjust optical path, it is only necessary to adjust substrate corner
The adjustment of the relative angle of substrate and pedestal can be realized in the fixed screw at place, and then adjusts the angle of reflecting mirror, realizes optical path
Adjustment.
But in the prior art, it when adjusting substrate, needs to screw fixed screw using screwdriver or die nut, by
It in screwdriver or die nut is separated with fixed screw, often occurs sliding or lose, especially when screwdriver or hexagonal are pulled
When rubber sleeve is fallen on inside equipment, security risk is easily caused, and since screwdriver or die nut are small in size, so that operation pole
It is inconvenient.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of screw structural, screw knots proposed by the present invention
Structure not only may be implemented to screw manually, but also can not use screwdriver or die nut and can be realized and screw.
Screw structural proposed by the present invention, comprising: screw ontology, the screw ontology include nut and with the nut phase
The screw rod of connection；Strip, the strip be fixed on the screw rod, and the strip extends perpendicularly to the screw rod
It is axial；Knob part, the knob part are set on the screw rod, and the knob part can be along the screw rod axially with respect to institute
It is mobile to state screw ontology, when the knob part is moved to clamped position, the knob part is mutually clamped with the strip；It is described
The outer surface of knob part is provided with knurling structure, after the knob part is mutually clamped with the strip, passes through the annular knurl
Structure screws the screw ontology.
Screw structural of the invention after being installed on substrate, when not needing adjustment substrate, is set on screw rod
Knob part is fallen on the upper surface of substrate, and when needing to adjust the angle of substrate, knob part is moved to clamped position along screw rod,
Knob part is fastened togather with strip fixed on screw ontology at this time, when screwing knob part manually, screw ontology and knob
Part rotates together, to realize the angular adjustment of substrate.Here knob part is due to being set on screw rod and when screw structural is pacified
After being attached on substrate, knob part can not be detached from from screw ontology, so be not in the phenomenon that knob part slides or loses, from
And security risk is avoided, especially after knurling structure is arranged in the outer surface of knob part, so that knob part outer surface rubs
It wipes power to increase, is conducive to be manually operated.
As a further refinement of the present invention, the screw rod includes interconnecting piece and threaded portion, the threaded portion passes through institute
It states interconnecting piece to connect with the first surface of the nut, further, the sectional dimension of the interconnecting piece is less than the threaded portion
Sectional dimension.
Here interconnecting piece can be used as escape when screw thread process, to facilitate the formation of threaded portion.
As a further refinement of the present invention, being provided with the first hole for accommodating the strip in the interconnecting piece
Portion, the axial direction for extending perpendicularly to the screw rod of first hole portion.Further, the strip and first hole portion are logical
Interference fit is fixed together.
Using strip and screw ontology split-type design, the production of screw ontology and strip is more convenient for process, and
When the axial direction for extending perpendicularly to screw rod of the first hole portion, the axial direction for extending perpendicularly to screw rod of strip ensure that,
In this way, being more conducive to engaging of the knob part with strip, and can guarantee and be engaging in place when knob part is moved along screw rod.It will
Strip is arranged in interconnecting piece, and strip can be made closer to nut, can thus reduce the size of knob part axially along a screw,
Increase screw ontology can active length.By interference fit, it is unnecessary to occur to avoid strip for strip and the first hole portion
Dislocation it is mobile, to ensure that the effect of engaging.
As the further improvement to the strip, projection of the strip on the nut is located in the nut
Portion.Thus can further control handle part sectional dimension, avoid knob part sectional dimension excessive, cause the waste in space.
As the further improvement to knob part, the second hole portion through the knob part is provided on the knob part,
The sectional dimension of second hole portion is less than the sectional dimension of the nut, is relatively set with groove portion in second hole portion,
The groove portion is axially extending along second hole portion, and the knob part is set on the screw rod by second hole portion,
The knob part is mutually clamped by the groove portion and the strip.
Second hole portion makes screw structural of the invention more convenient in assembly, when assembly, by the screw rod of screw ontology
Knob part is passed through along the second hole portion, groove portion is arranged in the second hole portion, this ensures that knob part can be moved along screw rod
To clamped position, when the sectional dimension of the second hole portion is less than the sectional dimension of nut, it is ensured that knob part does not depart from screw
Ontology, especially when groove portion along the second hole portion it is axially extending when, slightly upper shifter knob part can reach clamped position, improve
The speed of clamped position is reached, and then is improved work efficiency.
As a further refinement of the present invention, the knob part further includes the third hole portion for accommodating the nut,
The third hole portion is coaxial with second hole portion but does not run through the knob part.
Such knob part, since third hole portion accommodates nut wherein, knob part is located at the size of nut lower part
Reduce, so that the active length of screw ontology increases, when third hole portion does not extend through knob part, avoids knob part and pass through the
Three hole portions fall off from screw ontology, it is therefore prevented that the landing and loss of knob part.
As a further refinement of the present invention, the cross section of the knob part is circle, first hole portion, described the
Two hole portions and the third hole portion are round hole.Such circular configuration, so that knob part and three hole portions are easily worked system
Make, reduces the production cost.
As the further improvement to screw ontology, hexagonal is provided on the apparent surface of the first surface of the nut
Slot.When the load of substrate is larger and is not easy realization manually adjusts, die nut still can be used, screw is carried out further
It screws.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 is schematic diagram when screw structural of the invention is located at clamped position；
Fig. 2 is the main view of screw ontology；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the top view of Fig. 2；
Fig. 5 a and Fig. 5 b are respectively the main view sectional view and top view of the knob part of embodiment one；
Fig. 6 a and Fig. 6 b are respectively the main view sectional view and top view of the knob part of embodiment two；
Fig. 7 a and Fig. 7 b are respectively the schematic diagram that uses that screw structural of the invention is equipped on substrate, the screw in Fig. 7 a
Structure is in non-engagement position, and the screw structural in Fig. 7 b is in clamped position.
In the accompanying drawings, identical component uses identical appended drawing reference.Attached drawing is not according to actual ratio.
Specific embodiment
The contents of the present invention are described in detail below with reference to attached drawing, "upper" "lower" " left side " " right side " hereinafter is equal
To should not be construed as limiting the invention relative to diagram direction.
Such as the schematic diagram that Fig. 1 is screw structural of the invention, which includes screw ontology 10, strip 20 and knob
Part 30, from figure 2 it can be seen that screw ontology 10 includes nut 11 and screw rod 12, strip 20 is fixed on screw rod 12, and strip
20 axial direction for extending perpendicularly to screw rod 12.Knob part 30 is set on screw rod 12, and knob part 30 can be along screw rod 12
It is mobile axially with respect to screw ontology 10, when knob part 30 is moved to clamped position, position as shown in Figure 1, knob part 30
It is mutually clamped with strip 20, and is provided with knurling structure (not shown) on the outer surface of knob part 31, annular knurl knot
Structure can increase the frictional force of outer surface 31, convenient to screw manually, after knob part 30 engages with strip 20, by revolving manually
Twisting knob part 30 can driving screws ontology 10.
Fig. 2 show the integral structure main view of screw ontology 10 and strip 20, from figure 2 it can be seen that screw rod 12 into
One step includes interconnecting piece 121 and threaded portion 122, and threaded portion 122 is connect by interconnecting piece 121 with the first surface 111 of nut 11,
Here screw ontology 10 is similar with screw structural in the prior art, i.e., nut 11 is cylindrical body, and screw rod 12 is similarly cylinder
Body, and nut 11 and screw rod 12 are coaxial.In order to facilitate the processing and fabricating of threaded portion 122, the preferably sectional dimension of interconnecting piece 121
Less than the sectional dimension of threaded portion 122, such interconnecting piece 121 can serve as the escape of screw thread process, facilitate screw thread
The processing and fabricating in portion 122.In order to increase the active length of screw ontology 10, it is preferable that being arranged strip 20 in interconnecting piece 121
In, make strip 20 closer to nut 11, allows for clamped position in this way close to the top of screw ontology 10, to increase spiral shell
The active length of silk ontology.
Fig. 3 is the left view of screw ontology 10 in Fig. 2, is used for from figure 3, it can be seen that being provided in interconnecting piece 121
The first hole portion 123 of strip 20, and the axial direction for extending perpendicularly to screw rod 12 of the first hole portion 123 are accommodated, can thus be protected
The extending direction of card item 20 is also perpendicularly to the axial direction of screw rod 12, when knob part 30 is moved along screw rod 12, is more conducive to revolving
The engaging of button part 30 and strip 20 guarantees to be engaging in place.Preferably, the central axis of the central axis Yu screw rod 12 of the first hole portion 123
Intersection.Preferably, strip 20 is fixed together with the first hole portion 123 using interference fit, is thus avoided that strip occurs not
Necessary dislocation movement, ensure that the effect of engaging.Preferably, the first hole portion 123 is round hole, and strip 20 is cylindrical body, this
Sample just facilitates manufacturing for the first hole portion and strip, reduces costs.
Preferably, projection of the strip 20 on nut 11 is located at the inside of nut 11, this ensures that knob part 30 is not
Screw ontology can be detached from.In order to avoid load it is larger when can not manual knob screw ontology 10, as shown in figure 4, in nut 11
Hex slot 112 is preferably provided on the opposite face of first surface 111, die nut convenient to use is screwed by hex slot 112
Screw ontology 10.
Fig. 5 a is the main view sectional view of knob part 30, and Fig. 5 b is the top view of Fig. 5 a, in conjunction with Fig. 5 a and Fig. 5 b, it is preferable that
The cross section 31 of knob part 30 is circle, and certainly, the cross section of knob part 30 may be other shapes such as ellipse, polygon
Etc..The second hole portion 32 through knob part 30 is provided on the knob part 30, and the sectional dimension of the second hole portion 32 is small
In the sectional dimension of nut 11, knob part 30 is prevented from this way by the second hole portion 32 and is detached from screw ontology 10.In the second hole
Groove portion 33 is relatively set in portion 32, moreover, the groove portion 33 being oppositely arranged, along the axially extending of the second hole portion 32, knob part 30 is logical
It crosses the second hole portion 32 to be set on screw rod 12, and is mutually clamped by groove portion 33 with strip 20.When groove portion 33 also extends through rotation
When button part 30, slightly upper shifter knob part 30 can reach clamped position, to improve engaging speed, improve work effect
Rate.When assembly, the screw rod 12 of screw ontology 10 is passed through into knob part 20 along the second hole portion 32, since groove portion 33 is arranged in the second hole
The inside in portion 32, so knob part 30 can be moved to clamped position along screw rod 12, so that groove portion 33 engages with strip 20.It is preferred that
Ground, the cross sectional shape of the second hole portion 32 are circle, it is of course also possible to be other shapes, such as rectangle, but to guarantee the second hole portion
32 sectional dimension is less than the sectional dimension of nut 11, and knob part 30 is prevented to be detached from screw ontology 10 by the second hole portion 32.
In a second embodiment of the present invention, such as Fig. 6 a and Fig. 6 b, knob part 30 further comprises third hole portion 34, excellent
Selection of land, third hole portion 34 and the second hole portion 32 are coaxial, but third hole portion 34 does not run through knob part 30,34 energy of third hole portion here
Enough accommodate nut 11, it is preferable that third hole portion 34 is round hole, processing and fabricating more convenient in this way, and when third hole portion 34 will
After nut 11 accommodates wherein, the size that knob part 30 is located at 11 lower part of nut is reduced to a certain extent, so that screw ontology 10
Length available increase, due to third hole portion 34 not run through knob part 30, so knob part 30 will not pass through third hole portion 34
It is detached from from screw ontology 10.
In array substrate prosthetic appliance, angle is carried out to the substrate for being provided with reflecting mirror using screw structural of the invention
Adjustment, Fig. 7 a and Fig. 7 b are the use schematic diagram that screw structural of the invention is equipped on substrate 40, on four sides of substrate 40
Screw structural (two corners are merely illustrated in Fig. 7 a and Fig. 7 b) is separately installed at angle, when do not need to the angle of substrate 40 into
When row adjustment, knob part 30 is placed on the upper surface of substrate 40, as shown in Figure 7a, when needing the angle to substrate 40 to adjust
When whole, clamped position will be moved on knob part 30 along screw rod 12, as shown in Figure 7b, then screw knob part 30, Jin Erxuan manually
The turn of the screw ontology 10 can realize the up and down adjustment of substrate 40, and after the completion of adjusting, lower shifter knob part 30 makes it fall in substrate 40
Upper surface on.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention rather than limit, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (8)
1. a kind of screw structural characterized by comprising
Screw ontology, the screw ontology include nut and the screw rod that is connected with the nut；
Strip, the strip are fixed on the screw rod, and the axial direction for extending perpendicularly to the screw rod of the strip；
Knob part, the knob part are set on the screw rod, and the knob part can be along the screw rod axially with respect to institute
It is mobile to state screw ontology, when the knob part is moved to clamped position, the knob part is mutually clamped with the strip；
The outer surface of the knob part is provided with knurling structure, after the knob part is mutually clamped with the strip, passes through
The knurling structure screws the screw ontology；
The second hole portion through the knob part is provided on the knob part, the sectional dimension of second hole portion is less than described
The sectional dimension of nut, is relatively set with groove portion in second hole portion, and the groove portion is prolonged along the axial direction of second hole portion
It stretches, the knob part is set on the screw rod by second hole portion, and the knob part passes through the groove portion and the card
Item is mutually clamped；
The knob part further includes the third hole portion for accommodating the nut, and the third hole portion and second hole portion are coaxial
But do not run through the knob part.
2. screw structural according to claim 1, which is characterized in that the screw rod includes interconnecting piece and threaded portion, described
Threaded portion is connect by the interconnecting piece with the first surface of the nut.
3. screw structural according to claim 2, which is characterized in that the sectional dimension of the interconnecting piece is less than the screw thread
The sectional dimension in portion.
4. screw structural according to claim 3, which is characterized in that be provided in the interconnecting piece for accommodating the card
First hole portion of item, the axial direction for extending perpendicularly to the screw rod of first hole portion.
5. screw structural according to claim 4, which is characterized in that the strip is matched with first hole portion by interference
Conjunction is fixed together.
6. screw structural according to claim 5, which is characterized in that projection of the strip on the nut is located at institute
State the inside of nut.
7. screw structural according to claim 6, which is characterized in that the cross section of the knob part is circle, described the
One hole portion, second hole portion and the third hole portion are round hole.
8. screw structural according to claim 2, which is characterized in that on the apparent surface of the first surface of the nut
It is provided with hex slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086458.7A CN106763076B (en) | 2017-02-17 | 2017-02-17 | A kind of screw structural |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086458.7A CN106763076B (en) | 2017-02-17 | 2017-02-17 | A kind of screw structural |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106763076A CN106763076A (en) | 2017-05-31 |
| CN106763076B true CN106763076B (en) | 2019-04-26 |
Family
ID=58957390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710086458.7A Active CN106763076B (en) | 2017-02-17 | 2017-02-17 | A kind of screw structural |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106763076B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296612B (en) * | 2018-12-07 | 2024-07-16 | 浙江盛世瑞金紧固件股份有限公司 | Antitheft bolt with good antitheft effect |
| CN110056563B (en) * | 2019-05-21 | 2024-06-04 | 石家庄格力电器小家电有限公司 | Supporting seat knob structure and fan |
| CN110480730A (en) * | 2019-08-05 | 2019-11-22 | 鹤山雅图仕印刷有限公司 | A kind of automatic leading-in device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2159447A (en) * | 1984-05-02 | 1985-12-04 | Rodger Malcolm Morris | Tamper-proof fastening tool & fastenings |
| CN2786342Y (en) * | 2004-10-14 | 2006-06-07 | 上海环达计算机科技有限公司 | Screw structure |
| CN201575033U (en) * | 2009-07-29 | 2010-09-08 | 曹蕾 | Embedded screw connecting piece free from tool installation |
| CN205001339U (en) * | 2015-08-24 | 2016-01-27 | 洛阳吉通化纤有限公司 | High -speed adding plays barrel pipe clamp pressure spring fastening screw for rocking arm |
| CN205744817U (en) * | 2016-07-09 | 2016-11-30 | 温州市强杰不锈钢标准件有限公司 | Hands the turn of the screw |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011117535A (en) * | 2009-12-03 | 2011-06-16 | Nec Saitama Ltd | Bolt |
| CN203931713U (en) * | 2014-05-27 | 2014-11-05 | 国家电网公司 | The special self-align bolt device of a kind of electric power system instrument transformer |
-
2017
- 2017-02-17 CN CN201710086458.7A patent/CN106763076B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2159447A (en) * | 1984-05-02 | 1985-12-04 | Rodger Malcolm Morris | Tamper-proof fastening tool & fastenings |
| CN2786342Y (en) * | 2004-10-14 | 2006-06-07 | 上海环达计算机科技有限公司 | Screw structure |
| CN201575033U (en) * | 2009-07-29 | 2010-09-08 | 曹蕾 | Embedded screw connecting piece free from tool installation |
| CN205001339U (en) * | 2015-08-24 | 2016-01-27 | 洛阳吉通化纤有限公司 | High -speed adding plays barrel pipe clamp pressure spring fastening screw for rocking arm |
| CN205744817U (en) * | 2016-07-09 | 2016-11-30 | 温州市强杰不锈钢标准件有限公司 | Hands the turn of the screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106763076A (en) | 2017-05-31 |
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