CN104898279A - Transmission mechanism, head-mounted display and diopter adjustment method - Google Patents
Transmission mechanism, head-mounted display and diopter adjustment method Download PDFInfo
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- CN104898279A CN104898279A CN201510204169.3A CN201510204169A CN104898279A CN 104898279 A CN104898279 A CN 104898279A CN 201510204169 A CN201510204169 A CN 201510204169A CN 104898279 A CN104898279 A CN 104898279A
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Abstract
The invention discloses a transmission mechanism, a head-mounted display and a diopter adjustment method. The transmission mechanism is used for controlling a first frame to move relative to a second frame, wherein the first frame is connected with the second frame through connecting components on the first frame; the transmission mechanism includes a shifting wheel with bevel gears, bevel gears, transmission shafts, transmission gears and cams; the shifting wheel with the bevel gears and the transmission shafts are installed on a horizontal frame of the second frame; the bevel gears are installed on the transmission shafts; the bevel gears are engaged with the bevel gears on the shifting wheel; the transmission gears, being in axial symmetry relative to the transmission shafts, are installed on vertical frames of the second frame; the cams are installed on the vertical frames of the second frame and are engaged with the transmission gears; the connecting components are provided with rollers; the cams are provided with sliding grooves; and the rollers are clamped into the sliding grooves and can move along the sliding grooves in a reciprocating manner, and can drive the connecting components to move linearly in a reciprocating manner. With the transmission mechanism provided by the above technical scheme of the invention adopted, direction-changing transmission and rotational-to-linear movement can be realized. The transmission mechanism has the advantages of stable and reliable transmission, simple structure and low cost.
Description
Technical field
The present invention relates to display technology field, be specifically related to a kind of gear train, head mounted display and Diopter accommodation method thereof.
Background technology
Current head mounted display design is on the market meticulous not, and mechanism is complicated, bulky.And head mounted display does not consider the user demand of hypometropia user usually, even if some head mounted display can realize Diopter accommodation, Diopter accommodation mechanism is also complicated especially, cost is very high, in addition, existing head mounted display does not often have auto-lock function when realizing Diopter accommodation, or needs that additional facilities is auxiliary realizes self-locking, this also can increase the cost of Diopter accommodation scheme, the development of serious restriction head mounted display.
Summary of the invention
The invention provides a kind of gear train, head mounted display and Diopter accommodation method thereof, to solve existing head mounted display Diopter accommodation complex structure, problem that cost is high.
For achieving the above object, technical scheme of the present invention is achieved in that
According to an aspect of the present invention, provide a kind of gear train, for controlling the first framework relative to the second frame movement, first framework is connected with the second framework by the web member be arranged on the first framework, and gear train comprises: be with the thumb wheel of bevel gear, bevel gear, transmission shaft, transmission gear and cam;
Thumb wheel with bevel gear and transmission shaft are arranged in a horizontal pane of the second framework;
Bevel gear is arranged on transmission shaft, and the cone tooth on bevel gear is meshed with the cone tooth on the thumb wheel of band bevel gear;
Transmission gear is that rotational symmetry is installed on the vertical frame of the second framework with transmission shaft; Cam is arranged on the vertical frame of the second framework, and is meshed with transmission gear;
Web member is provided with roller, and cam is provided with sliding tray, and roller snaps in sliding tray, and can, along sliding tray to-and-fro movement, be with follower link to do straight reciprocating motion simultaneously.
Alternatively, sliding tray is evolvent type sliding tray.
Alternatively, roller along in evolvent type sliding tray reciprocatory movement when the active component that roller is subject in the movement direction is less than the friction force suffered by roller, there is self-locking between cam and roller.
Alternatively, the quantity of bevel gear and transmission shaft is two;
These two bevel gears respectively symmetry are arranged on two transmission shafts, and are meshed with the bevel gear on the thumb wheel of band bevel gear respectively.
Alternatively, transmission gear comprises: the first transmission gear and the second transmission gear,
First transmission gear is that rotational symmetry is installed on the vertical frame of the second framework with transmission shaft;
Second transmission gear is installed on the second framework by the rotating shaft symmetry be fixed on the second framework vertical frame, and closes with the first transmission gear and cam meshing respectively.
Alternatively, the modulus of the first transmission gear equals the modulus of the second transmission gear, and the number of teeth of the first transmission gear is less than the gear of the second transmission gear;
Alternatively, web member has groove, be provided with the rotating shaft be fixedly connected with the second framework in groove, cam is fixedly connected with by the vertical frame of rotating shaft with the second framework, and when roller is along sliding tray to-and-fro movement, groove relatively this rotating shaft does straight reciprocating motion.
Alternatively, a horizontal pane of the second framework has holding tank, the thumb wheel of band bevel gear is partially received in holding tank, and is fixedly mounted in a horizontal pane of the second framework by metal shaft.
According to a further aspect in the invention, provide a kind of head mounted display, this head mounted display comprises the gear train as one aspect of the invention;
Wherein, first framework is the framework for supporting member head mounted displays display screen, second framework is the framework for supporting member head mounted displays lens set, is become the rectilinear motion of the first framework from the rotary motion of the thumb wheel of gear train, realizes the Diopter accommodation of head mounted display.
According to another aspect of the invention, additionally provide a kind of Diopter accommodation method of head mounted display, head mounted display comprises the first framework for supporting member head mounted displays display screen, and for the second framework of supporting member head mounted displays lens set, first framework is connected with the second framework by the web member be arranged on the first framework, and the method comprises:
The thumb wheel of mounting strap bevel gear and transmission shaft in a horizontal pane of the second framework;
Transmission shaft installs bevel gear, and bevel gear is meshed with the bevel gear on the thumb wheel of band bevel gear;
Be that rotational symmetry is installed on the vertical frame of the second framework with transmission shaft by transmission gear;
The vertical frame of the second framework installs cam, and cam is meshed with transmission gear;
Web member is provided with roller, cam is provided with sliding tray, roller snaps in sliding tray, and along sliding tray to-and-fro movement, the first framework can be driven simultaneously to do straight reciprocating motion relative to the second framework, realize the Diopter accommodation of head mounted display.
The invention has the beneficial effects as follows: gear train adopts gear to coordinate transmission, cam engagement realizes self-locking, reach stable drive reliable, the simple and effective effect of self-locking, ensure that the linear reciprocating motion of the first framework relative to the second framework, achieve break-in rotate and rotate the motion straightening line, and there is auto-lock function.In addition, this gear train is arranged on the Diopter accommodation that can realize head mounted display in head mounted display, the user facilitating eyesight different uses, and improves user's experience, also saves the cost of product.
Accompanying drawing explanation
Fig. 1 is the front view of a kind of head mounted display of one embodiment of the invention;
Fig. 2 is the vertical view of a kind of head mounted display of one embodiment of the invention;
Fig. 3 is the side view of a kind of head mounted display of one embodiment of the invention;
Fig. 4 is the first framework stationary state schematic diagram of a kind of head mounted display of one embodiment of the invention;
Fig. 5 a-5c is the first frame movement view of a kind of head mounted display of one embodiment of the invention;
Fig. 6 be one embodiment of the invention with the cam work view corresponding to Fig. 5 a-5c.
Embodiment
Core concept of the present invention is: for the problem that head mounted display Diopter accommodation complex structure cost in prior art is high, gear train of the present invention can realize break-in transmission and rotate becoming rectilinear motion, ensure that stable drive is reliable by gear drive, employing structure is simple, the cam mechanism of the characteristics of motion that easy realization is more complicated realizes self-locking, ensure that the simple, efficient of self-locking.And the cost of the present invention program is low.
Fig. 1 is the front view of a kind of head mounted display of one embodiment of the invention, and Fig. 2 is the vertical view of a kind of head mounted display of one embodiment of the invention, and Fig. 3 is the side view of a kind of head mounted display of one embodiment of the invention;
See Fig. 1-to Fig. 3, this head mounted display that have employed gear train provided by the invention comprises:
For the first framework 11 of supporting member head mounted displays display screen, for the second framework 12 of supporting member head mounted displays lens set.In the present embodiment, gear train comprises: be with the thumb wheel 15 of bevel gear, bevel gear 14, transmission shaft 13, transmission gear 16 and cam 17;
Thumb wheel 15 with bevel gear and transmission shaft 13 are arranged in the horizontal pane of the second framework 12;
Bevel gear 14 is arranged on transmission shaft 13, and the cone tooth on it is meshed with the cone tooth on the thumb wheel 15 of band bevel gear, realizes 90 ° and turns to transmission;
Transmission gear 16 is installed on the vertical frame of the second framework 12 by transmission shaft 13; Cam 17 is arranged on the vertical frame of the second framework 12, and is meshed with transmission gear 16;
Web member is provided with roller, and cam 17 is provided with sliding tray, and roller snaps in sliding tray, and can, along sliding tray to-and-fro movement, be with follower link to do straight reciprocating motion simultaneously.
In one embodiment of the invention, cam 17 is provided with sliding tray to comprise: sliding tray is set to evolvent type sliding tray.
In the present embodiment, roller along in evolvent type sliding tray reciprocatory movement when the active component that roller is subject in the movement direction is less than the friction force suffered by roller, there is self-locking between cam 17 and roller.
Cam mechanism has curved profile or groove, drives driven member (web member namely on the first framework) to realize a kind of higher pair mechanism of desired movement rule along the curved profile designed or groove by higher pair contact.In one embodiment of the invention, the curved profile on cam is evolvent type sliding tray, can realize the first framework relative to the second framework uniform motion and realize self-locking by the groove design on cam being become evolvent type sliding tray.Concrete condition of self-locking be roller along in evolvent type sliding tray reciprocatory movement when the active component that roller is subject in the movement direction is less than the friction force suffered by roller, there is self-locking between cam and roller.Namely pressure angle increases to setting value.The pressure angle of cam mechanism refers to driven member direction of motion and the acute angle folded by its Impact direction, pressure angle is larger, the harmful component (stoping the power of driven member motion) be subject to above driven member is larger, when pressure angle increases to a certain degree, harmful friction force caused by component is greater than active component (promoting the power of driven member motion), then self-locking will occur between cam and roller.The acting force that namely driven member occurs no matter to add to is much, the phenomenon that driven member all can not move.The pressure angle of cam mechanism and the acting force of roller to be considered during design, carry out specific design.
In head mounted display, use gear train of the present invention, by the coordinating of thumb wheel of bevel gear with band bevel gear, achieve 90 ° and turn to transmission, namely transfer vertical direction transmission to by horizontal direction transmission; Achieving by rotation motion to linear and auto-lock function by cam mechanism, is namely that the first framework is relative to the second framework rectilinear motion by the rotational translation of cam.Further, first framework can be the framework for supporting display screen, second framework is the framework of support lenses group, by controlling the frame movement of framework relative to lens set place at display screen place, achieve the Diopter accommodation of head mounted display, the user facilitating eyesight different carries out adjustment and uses, and improves Consumer's Experience.
See Fig. 1-3, in one embodiment of the invention, the quantity of bevel gear 14 and transmission shaft 13 is two; To be arranged on symmetrical respectively for these two bevel gears 14 on two transmission shafts 13 and these two bevel gears are meshed with the bevel gear on the thumb wheel of band bevel gear respectively.In other embodiments of the invention, gear train can only comprise: a bevel gear and a transmission shaft, and namely bevel gear to be installed on a transmission shaft and bevel gear is meshed with the bevel gear on thumb wheel.
In one embodiment of the invention, transmission gear comprises the first transmission gear and the second transmission gear, and the modulus of the first transmission gear equals the modulus of the second gear, and the number of teeth of the first transmission gear is less than the gear of the second transmission gear; See Fig. 1-Fig. 3, the transmission gear be connected with the second framework 12 through transmission shaft 13 is the first transmission gear, to be connected and the transmission gear be meshed with cam 17 is the second transmission gear through rotating shaft with the second framework.
It should be noted that, the quantity of transmission gear can need to increase and decrease according to concrete use.In the present embodiment, second framework each side have two transmission gears, first transmission gear is equal with the modulus of the second transmission gear and the number of teeth that is gear ratio second gear of the first transmission gear is few, adopt such transmission gear structure to realize: by stirring two circle thumb wheels, the first framework is relative to the effect of the second frame movement preset distance such as (6 millimeters).Should consider ratio of gear when practical application, the factors such as the distance of transmission shaft to cam shaft center and the rectilinear motion distance for the first framework of realization specifically select the quantity of transmission gear, do not limit this.
See Fig. 2, in one embodiment of the invention, in one horizontal pane of the second framework, (that horizontal pane specifically above the second framework) has holding tank 1201, thumb wheel 15 with bevel gear is partially received in holding tank 1201, and is fixedly mounted on by metal shaft 18 in a horizontal pane of the second framework 12.
Fig. 5 a-5c is the first frame movement view of a kind of head mounted display of one embodiment of the invention, Fig. 6 be one embodiment of the invention with the cam work view corresponding to Fig. 5 a-5c; See Fig. 5 a-5c and Fig. 6, wherein, Fig. 5 a is the view before the first frame movement, see Fig. 5 a, the roller 1101 on the web member 110 on the first framework 11 is nearest apart from the central shaft of cam 17, now, stir the thumb wheel of band bevel gear left, then roller 1101 slides along the evolvent type sliding tray 171 on cam 17, and is with follower link 110, and then drives the first framework away from the second framework.Roller 1101 moves to the process of high order end from the low order end of evolvent type sliding tray 171, is also that the first framework is gradually away from the process of the second framework.Owing to being rolling friction between roller 1101 and evolvent type sliding tray (cam contour) 171, larger load can be born.Fig. 5 b is the view in the first frame movement; See Fig. 5 b, the distance of the first framework and the second framework is moderate.Fig. 5 c is the view after the first frame movement, see Fig. 5 c first framework distance the second framework farthest.
In one embodiment of the invention, see Fig. 5 a to Fig. 5 c, web member 110 has groove 1102, the rotating shaft be fixedly connected with the second framework 12 is provided with in groove 1102, cam 17 is fixedly connected with by the vertical frame of rotating shaft with the second framework 12, when roller 1101 is along sliding tray 171 to-and-fro movement, straight reciprocating motion is done in groove 1102 this rotating shaft relative.
Corresponding with the head mounted display of above-mentioned employing gear train of the present invention, present invention also offers a kind of head mounted display Diopter accommodation method, head mounted display comprises the first framework for supporting member head mounted displays display screen, and for the second framework of supporting member head mounted displays lens set, first framework is connected with the second framework by the web member be arranged on the first framework, and the method comprises:
The thumb wheel of mounting strap bevel gear and transmission shaft in a horizontal pane of the second framework;
Transmission shaft installs bevel gear, and bevel gear is meshed with the bevel gear on the thumb wheel of band bevel gear;
Be that rotational symmetry is installed on the vertical frame of the second framework with transmission shaft by transmission gear;
The vertical frame of the second framework installs cam, and cam is meshed with transmission gear;
Web member is provided with roller, cam is provided with sliding tray, roller snaps in sliding tray, and along sliding tray to-and-fro movement, the first framework can be driven simultaneously to do straight reciprocating motion, realize the Diopter accommodation of head mounted display.
In one embodiment of the invention, cam is provided with sliding tray comprise: sliding tray is set to evolvent type sliding tray, and roller along in evolvent type sliding tray reciprocatory movement when the active component that roller is subject in the movement direction is less than the friction force suffered by roller, there is self-locking between cam and roller.
In one embodiment of the invention, the quantity of bevel gear and transmission shaft is two;
To be arranged on symmetrical respectively for these two bevel gears on two transmission shafts and to be meshed with the bevel gear on the thumb wheel of band bevel gear respectively.
In one embodiment of the invention, transmission gear comprises: the first transmission gear and the second transmission gear;
First transmission gear is that rotational symmetry is installed on two vertical frames of the second framework with transmission shaft;
Second transmission gear is installed on two vertical frames of the second framework by the rotating shaft symmetry be fixed on the second framework, and closes with the first transmission gear and described cam meshing respectively.
It should be noted that, the Diopter accommodation method of this head mounted display of the present invention is corresponding with aforesaid head mounted display, thus the implementation procedure of this wear-type display Diopter accommodation method can illustrating see aforementioned head mounted display part, do not repeat them here.
In sum, gear train of the present invention adopts gear to coordinate transmission, cam engagement realizes self-locking, reach stable drive reliable, the simple and effective effect of self-locking, ensure that the linear reciprocating motion of the first framework relative to the second framework, achieve break-in and rotate and rotate the motion straightening line, and there is auto-lock function.In addition, this gear train is arranged on the Diopter accommodation that can realize head mounted display in head mounted display, the user facilitating eyesight different uses, and improves user's experience, also saves the cost of product.In addition, the invention provides a kind of method utilizing above-mentioned gear train to realize head mounted display Diopter accommodation, realize simple, cost is low.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a gear train, for controlling the first framework relative to the second frame movement, it is characterized in that, described first framework is connected with described second framework by the web member be arranged on the first framework, and described gear train comprises: be with the thumb wheel of bevel gear, bevel gear, transmission shaft, transmission gear and cam;
Thumb wheel and the described transmission shaft of described band bevel gear are arranged in a horizontal pane of described second framework;
Described bevel gear is arranged on described transmission shaft, and the cone tooth on bevel gear is meshed with the cone tooth on the described thumb wheel being with bevel gear;
Described transmission gear is with on the described transmission shaft vertical frame that is rotational symmetry is installed to described second framework; Described cam is arranged on the vertical frame of described second framework, and is meshed with described transmission gear;
Described web member is provided with roller, and described cam is provided with sliding tray, and described roller snaps in described sliding tray, and can, along described sliding tray to-and-fro movement, drive described web member to do straight reciprocating motion simultaneously.
2. gear train as claimed in claim 1, it is characterized in that, described sliding tray is evolvent type sliding tray.
3. gear train as claimed in claim 2, it is characterized in that, described roller along in described evolvent type sliding tray reciprocatory movement when the active component that described roller is subject in the movement direction is less than the friction force suffered by roller, there is self-locking between described cam and roller.
4. gear train as claimed in claim 1 or 2, it is characterized in that, the quantity of described bevel gear and described transmission shaft is two;
These two bevel gears are symmetrical to be respectively arranged on two transmission shafts and to be meshed with the bevel gear on the described thumb wheel being with bevel gear respectively.
5. gear train as claimed in claim 1, it is characterized in that, described transmission gear comprises: the first transmission gear and the second transmission gear;
Described first transmission gear is that rotational symmetry is installed on two vertical frames of described second framework by transmission shaft;
Described second transmission gear is installed on two vertical frames of described second framework by the rotating shaft symmetry be fixed on described second framework, and closes with described first transmission gear and described cam meshing respectively.
6. gear train as claimed in claim 5, it is characterized in that, the modulus of described first transmission gear equals the modulus of described second transmission gear, and the number of teeth of described first transmission gear is less than the gear of described second transmission gear.
7. gear train as claimed in claim 1, it is characterized in that, described web member has groove, the rotating shaft be fixedly connected with described second framework is provided with in described groove, described cam is fixedly connected with by the vertical frame of described rotating shaft with described second framework, when roller is along described sliding tray to-and-fro movement, described groove relatively this rotating shaft does straight reciprocating motion.
8. gear train as claimed in claim 1, it is characterized in that, one horizontal pane of described second framework has holding tank, and the thumb wheel of described band bevel gear is partially received in holding tank, and is fixedly mounted on by metal shaft in a horizontal pane of described second framework.
9. a head mounted display, is characterized in that, described head mounted display comprises: the gear train according to any one of claim 1-8;
Wherein, described first framework is the framework for supporting described head mounted display display screen, described second framework is the framework for supporting described head mounted display lens set, become the rectilinear motion of described first framework from the rotary motion of the thumb wheel of described gear train, realize the Diopter accommodation of described head mounted display.
10. the Diopter accommodation method of a head mounted display, described head mounted display comprises the first framework for supporting described head mounted display display screen, and for supporting the second framework of described head mounted display lens set, described first framework is connected with described second framework by the web member be arranged on the first framework, it is characterized in that, the method comprises:
The thumb wheel of mounting strap bevel gear and transmission shaft in a horizontal pane of described second framework;
Described transmission shaft installs bevel gear, and described bevel gear is meshed with the bevel gear on the described thumb wheel being with bevel gear;
By described transmission gear with on the described transmission shaft vertical frame that is rotational symmetry is installed to described second framework;
The vertical frame of described second framework installs cam, and described cam is meshed with described transmission gear;
Described web member is provided with roller, described cam is provided with sliding tray, described roller snaps in described sliding tray, and can along described sliding tray to-and-fro movement, drive described first framework to do straight reciprocating motion relative to described second framework simultaneously, realize the Diopter accommodation of described head mounted display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204169.3A CN104898279B (en) | 2015-04-23 | 2015-04-23 | A kind of transmission mechanism, head mounted display and its Diopter accommodation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510204169.3A CN104898279B (en) | 2015-04-23 | 2015-04-23 | A kind of transmission mechanism, head mounted display and its Diopter accommodation method |
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| CN104898279A true CN104898279A (en) | 2015-09-09 |
| CN104898279B CN104898279B (en) | 2017-12-15 |
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| CN201510204169.3A Active CN104898279B (en) | 2015-04-23 | 2015-04-23 | A kind of transmission mechanism, head mounted display and its Diopter accommodation method |
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| WO2019071518A1 (en) * | 2017-10-12 | 2019-04-18 | 深圳市柔宇科技有限公司 | Display apparatus and electronic apparatus |
| CN110389448A (en) * | 2019-06-20 | 2019-10-29 | 解涛 | A kind of VR wearable device of adjustable myopia degree |
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| CN104898279B (en) | 2017-12-15 |
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