CN203405661U - Motor-driven double optical filter switching device - Google Patents
Motor-driven double optical filter switching device Download PDFInfo
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- CN203405661U CN203405661U CN201320429315.9U CN201320429315U CN203405661U CN 203405661 U CN203405661 U CN 203405661U CN 201320429315 U CN201320429315 U CN 201320429315U CN 203405661 U CN203405661 U CN 203405661U
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- filter
- motor
- filter holder
- optical
- optical filter
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Abstract
The utility model relates to a motor-driven double optical filter switching device, comprising a holder, an optical filter holder, and a motor. The holder comprises a fan-shaped groove and a cylindrical groove. The fan-shaped groove is communicated with the cylindrical groove through a gap. The optical filter holder is disposed in the fan-shaped groove of the holder through a rotating shaft. The optical filter holder can swing back and forth around the rotating shaft in the fan-shaped groove, so as to switch the double optical filters. A power output shaft of the motor is a worm, and the worm is disposed in the cylindrical groove of the holder, wherein the optical filter holder is far away from the rotating shaft and a tooth portion with a predetermined length is disposed closed to an edge of the gap, and the tooth portion is meshed with the worm. The motor-driven double optical filter switching device also comprises an elastic component which is disposed on the holder or the optical filter holder. The elastic component applies pre-pressure on the optical filter holder, so that the optical filter holder contacts the worm and successfully meshes with the worm when the optical filter holder begins to execute a switching operation for the next optical filter.
Description
Technical field
The utility model relates to the accessory of Digital Video, digital CCTV camera, especially a kind of two optical-filter switchers of motor-driven that prevent motor rotation blockage.
Background technology
At present, the two optical-filter switchers of known motor-driven have two kinds, and a kind of is rack-and-pinion type transmission mechanism design, and another kind is Worm and worm-wheel gearing design, and normally worm screw adds the secondary drive mechanism that helical teeth step tooth adds worm gear.When switch will be carried out switching action, video control card can provide a short time voltage, drive motor rotation, the gear or the worm screw that are installed on motor drive filter holder moving linearly (for pinion and-rack design) or the motion that pivots (for Worm-gear type design), to reach the object that is switched to another optical filter from an optical filter.But, because the power-on time of video control card is constant and is conventionally greater than and switches the time of institute's actual needs of move, after optical filter switching puts in place, will be blocked and be forced to and stop.After optical filter is forced to stop, motor is power-off not, so motor formed stall, has produced large locked rotor current, and has produced crunch between the gear on filter holder and motor (or worm screw).Locked rotor current is crossed senior general may burn video control card, and pressure between filter holder and motor gear (or worm screw) cannot discharge (especially in the situation that worm gear has self-locking action), by causing the very large starting current of motor when starting next time needs, even cannot drive gear train to switch.
Utility model content
The purpose of this utility model is to provide a kind of two optical-filter switchers of motor-driven that prevent motor rotation blockage, avoid because the locked rotor current that causes of motor rotation blockage is excessive thereby burn video control card, filter holder is stuck to such an extent as to the problem that cannot normally switch.
The two optical-filter switchers of this motor-driven, comprising: a retainer, and it comprises a fan groove and a cylindrical groove, this fan groove is connected with this cylindrical groove by a breach; One filter holder, it is arranged in this fan groove of this retainer by a rotating shaft, this filter holder can swing back and forth around this rotating shaft the switching of two optical filters in this fan groove, an and motor, the power output shaft of this motor is a worm screw, this worm screw is installed in this cylindrical groove of this retainer, and wherein this filter holder is away from this rotating shaft and be provided with the tooth portion of a predetermined length near the edge of this breach, this tooth portion can with this worm mesh; And the two optical-filter switchers of this motor-driven also comprise a flexible member, this flexible member is arranged on this retainer or on this filter holder, when this filter holder switches any optical filter and puts in place, this flexible member gives this filter holder one precompression, and this filter holder is contacted with this worm screw and engagement smoothly when starting to carry out next optical filter switching action.
Preferably, this flexible member is a torsion spring, and this torsion spring comprises a center pit and at least one elastic arm, and this torsion spring is socketed in this rotating shaft by this center pit, and this elastic arm is stuck in this filter holder for assembling between two pilot holes of optical filter.After no matter which tablet filter this filter holder switches and puts in place, this filter holder has all departed from its initial position, also just make the elastic arm of this torsion spring depart from its initial position, can give the precompression of a reset of this filter holder, this precompression contacts and engagement smoothly this filter holder when starting to carry out next optical filter switching action with this worm screw.
Preferably, this flexible member is a pair of shell fragment or spring, and symmetry is arranged on the two ends of this fan groove of this retainer.Like this, when filter holder switches a certain optical filter and puts in place, this filter holder is rocked to one end of this fan groove, encounter wherein a shell fragment or spring, oppress this shell fragment or camber of spring, this shell fragment or spring give this filter holder one elastic force, and this elastic force contacts and engagement smoothly this filter holder when starting to carry out next optical filter switching action with this worm screw.
Preferably, this flexible member is a pair of shell fragment or spring, and symmetry is arranged on the both sides of this filter holder.Like this, when filter holder switches a certain optical filter and puts in place, this filter holder is rocked to one end of this fan groove, this filter holder is provided with a side impact of this shell fragment or spring to the edge of this fan groove, oppress this shell fragment or camber of spring, this shell fragment or spring give this filter holder one elastic force, and this elastic force contacts and engagement smoothly this filter holder when starting to carry out next optical filter switching action with this worm screw.
Preferably, this tooth portion has and just drives to the enough length putting in place that each optical filter is switched.Like this, after optical filter switches and to put in place, perhaps worm screw also continues rotation, but tooth portion has departed from the engagement with this worm screw, so motor stall can not occur, and filter holder can not be stuck yet.
In sum, the utility model adopts the tooth portion of filter holder predetermined length and the kind of drive of worm mesh, in conjunction with flexible member, provide precompression to ensure that this filter holder contacts with this worm screw and engagement smoothly to this filter holder, effectively avoided the two optical-filter switchers of motor-driven because of the locked rotor current that motor rotation blockage brings excessive, cause burning video control card, and filter holder is stuck, motor cannot start the problem of switching of carrying out.
Accompanying drawing explanation
The structural representation of the two optical-filter switchers of motor-driven that Fig. 1 provides for the utility model the first embodiment;
Fig. 2 is the structural representation of retainer in Fig. 1;
Fig. 3 is the structural representation of filter holder in Fig. 1;
Fig. 4 is the structural representation of torsion spring in Fig. 1;
Fig. 5 is the position view of filter holder while switching to the first optical filter;
The process schematic diagram of Fig. 6 when to be filter holder switch to the second optical filter;
Fig. 7 is the position view of mating plate frame while switching to the second optical filter; Wherein this first optical filter and the second optical filter not refer in particular to some optical filters, but from a tablet filter, switch to the process of another optical filter for describe this filter holder in conjunction with Fig. 5-7, from the second optical filter, be switched to the inverse process that the first optical filter is this process;
Fig. 8 is the structural representation of the two optical-filter switchers of the motor-driven that provides of the utility model the second embodiment;
Fig. 9 is the structural representation of the two optical-filter switchers of the motor-driven that provides of the utility model the 3rd embodiment.
Embodiment
Below in conjunction with diagram, describe the two optical-filter switchers of motor-driven that the utility model provides in detail, below diagram and explanatory note only describe several preferred embodiments of the present utility model, therefore do not limit protection domain of the present utility model.
As shown in Figure 1, the two optical-filter switchers of a kind of motor-driven that the utility model the first embodiment provides, comprising: retainer 1, one filter holder 2, one motors, the power output shaft of this motor is a worm screw 3, and a torsion spring 4.Wherein this retainer 1 as shown in Figure 2, comprises a fan groove 12 and a cylindrical groove 13, and this fan groove 12 is connected with this cylindrical groove 13 by a breach 15, is also provided with a rotating shaft 11 in this fan groove 12; This filter holder 2 is arranged on by this rotating shaft 11 in this fan groove 12 of this retainer 1, and this filter holder 2 can swing back and forth around this rotating shaft 11 switching of two optical filters in this fan groove 12.This worm screw 3 is installed in this cylindrical groove 13 of this retainer 1.As shown in Figure 3, this filter holder is a similar fan-shaped structure, its fan-shaped edge is provided with the tooth portion 21 of a predetermined length, namely in Fig. 1, on its installation site, this filter holder 2 is provided with the tooth portion 21 of a predetermined length away from the edge of this rotating shaft 11 and close this breach 15, this tooth portion 21 can mesh with this worm screw 3.As shown in Figure 4, this torsion spring 4 comprises a center pit 41 and at least one elastic arm 42, and this torsion spring 4 is socketed in this rotating shaft 11 by this center pit 41, and this elastic arm 42 is stuck in this filter holder 2 for assembling between two pilot holes of optical filter.After due to no matter, which tablet filter this filter holder 2 switches and puts in place, this filter holder 2 has all departed from its initial position, also just make the elastic arm 42 of this torsion spring 4 depart from its initial position, can give the precompression of 2 one resets of this filter holder, this precompression contacts and engagement smoothly this filter holder 2 when starting to carry out next optical filter switching action with this worm screw 3.What pay special attention to is, this tooth portion 21 is designed to a predetermined length, just each optical filter can be switched to the length putting in place, be advisable, that is to say, as long as optical filter transmission can be put in place, do not need reserved longer tooth portion to coordinate with worm screw 3, after optical filter switching puts in place on the contrary, worm screw 3 preferably departs from and meshes with tooth portion 21, and the engagement process next time of worm screw and tooth portion 21 provides precompression to ensure by flexible members such as torsion springs 4, rather than ensure that by long tooth portion gear train meshes all the time.Therefore the two optical-filter switchers of motor-driven that, the present embodiment provides can effectively avoid the locked rotor current that brings because of motor rotation blockage excessive, cause burning video control card and filter holder is stuck, motor cannot start the problem of switching of carrying out.
Below in conjunction with Fig. 5 to Fig. 7, introduce the process that this pair of optical-filter switcher switches optical filter.First, as shown in Figure 5, while switching to the first optical filter, worm screw 3 is with the tooth portion 21 of filter holder 2 in the high order end engagement shown in Fig. 5, if now motor is still in energising running status, worm screw 3 can depart from engagement with the tooth portion 21 of filter holder 2, motor can not produce stall, therefore can not produce larger locked rotor current, filter holder 2 can not continue towards the right to swing as shown in Figure 5 yet, therefore there will not be optical filter stuck phenomenon yet; In the time of need to switching to the second optical filter, motor reversal, under the acting force of torsion spring 4, filter holder 2 keeps in touch with scroll bar 3, and worm screw 3 and tooth portion 21 are meshed smoothly, as shown in Figure 6, filter holder 2 is moving towards left swing, until Fig. 7 switches to the second optical filter position, filter holder 2 is rocked to the high order end shown in Fig. 7, the low order end of tooth portion 21 and worm screw 3 and engagement.Now, if motor still in energising running status, worm screw 3 can depart from engagement with tooth portion 21, motor can not produce stall, therefore can not produce larger locked rotor current, filter holder 2 can not continue towards the left side to swing as shown in Figure 7 yet, therefore there will not be optical filter stuck phenomenon yet.The process that switches to the first optical filter from the second optical filter is the inverse process of said process, at this enumeration no longer.
In addition, selectable, the utility model also provides one second embodiment, as shown in Figure 8, this embodiment Elastic element is a pair of shell fragment 5, and certain spring is alternative shell fragment also, this is arranged on the both sides of this filter holder 2 to shell fragment 5 symmetries, namely a side is fixed with a shell fragment 5 symmetrically.Like this, when a certain optical filter of filter holder 2 switching puts in place, this filter holder 2 is rocked to one end of this fan groove 12, the edge of this fan groove 12 can be met in the side that this filter holder 2 is provided with this shell fragment 5, oppress this shell fragment 5 distortion, this shell fragment 5 gives this filter holder 2 one elastic forces, and this elastic force contacts and engagement smoothly this filter holder 2 when starting to carry out next optical filter switching action with this worm screw 3.
The utility model also provides one the 3rd embodiment, and as shown in Figure 9, this embodiment Elastic element is a pair of shell fragment 6, certainly spring also can replace shell fragment, this is arranged on the two ends of this fan groove 12 of this retainer 1 to shell fragment 6 symmetries, that is to say, one end arranges a shell fragment 6.Like this, when a certain optical filter of filter holder 2 switching puts in place, this filter holder 2 is rocked to one end of this fan groove 12, encounter a wherein shell fragment 6, oppress this shell fragment 6 distortion, this shell fragment 6 gives this filter holder one elastic force, and this elastic force contacts and engagement smoothly this filter holder 2 when starting to carry out next optical filter switching action with this worm screw.
The two optical-filter switchers of motor-driven that provide due to the utility model adopt the tooth portion 21 of filter holder 2 predetermined lengths and the kind of drive of worm screw 3 engagements, in conjunction with flexible member, provide precompression to ensure that this filter holder 2 contacts with this worm screw 3 and engagement smoothly to this filter holder 2, effectively avoided the two optical-filter switchers of motor-driven because of the locked rotor current that motor rotation blockage brings excessive, cause burning video control card, and filter holder is stuck, motor cannot start the problem of switching of carrying out.
It is pointed out that and the foregoing is only preferred embodiment of the present utility model, therefore all other impartial variations and modification of doing according to the utility model claim scope, all should belong to the covering scope of the utility model claim.
Claims (5)
1. two optical-filter switchers of motor-driven, comprising:
One retainer, it comprises a fan groove and a cylindrical groove, this fan groove is connected with this cylindrical groove by a breach;
One filter holder, it is arranged on by a rotating shaft in this fan groove of this retainer, and this filter holder can swing back and forth around this rotating shaft the switching of two optical filters in this fan groove, and
One motor, the power output shaft of this motor is a worm screw, this worm screw is installed in this cylindrical groove of this retainer, it is characterized in that:
This filter holder is away from this rotating shaft and near the edge of this breach, be provided with the tooth portion of a predetermined length, this tooth portion can with this worm mesh; And the two optical-filter switchers of this motor-driven also comprise a flexible member, this flexible member is arranged on this retainer or on this filter holder, give this filter holder one precompression, make this filter holder start to carry out when optical filter switches action and contact with this worm screw and engagement smoothly.
2. two optical-filter switchers of motor-driven as claimed in claim 1, it is characterized in that, this flexible member is a torsion spring, this torsion spring comprises a center pit and at least one elastic arm, this torsion spring is socketed in this rotating shaft by this center pit, and this elastic arm is stuck in this filter holder for assembling between two pilot holes of optical filter.
3. the two optical-filter switchers of motor-driven as claimed in claim 1, is characterized in that, this flexible member is a pair of shell fragment or spring, and symmetry is arranged on the two ends of this fan groove of this retainer.
4. the two optical-filter switchers of motor-driven as claimed in claim 1, is characterized in that, this flexible member is a pair of shell fragment or spring, and symmetry is arranged on the both sides of this filter holder.
5. the two optical-filter switchers of motor-driven as claimed in claim 1, is characterized in that, this tooth portion has just to drive to enough switches by each optical filter the length putting in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320429315.9U CN203405661U (en) | 2013-07-15 | 2013-07-15 | Motor-driven double optical filter switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320429315.9U CN203405661U (en) | 2013-07-15 | 2013-07-15 | Motor-driven double optical filter switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203405661U true CN203405661U (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320429315.9U Expired - Fee Related CN203405661U (en) | 2013-07-15 | 2013-07-15 | Motor-driven double optical filter switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203405661U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106161918A (en) * | 2015-04-13 | 2016-11-23 | 浙江宇视科技有限公司 | The drive mechanism of a kind of video camera and video camera |
| CN113759484A (en) * | 2020-06-02 | 2021-12-07 | 成都鼎桥通信技术有限公司 | Track spring mounting jig |
-
2013
- 2013-07-15 CN CN201320429315.9U patent/CN203405661U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106161918A (en) * | 2015-04-13 | 2016-11-23 | 浙江宇视科技有限公司 | The drive mechanism of a kind of video camera and video camera |
| CN113759484A (en) * | 2020-06-02 | 2021-12-07 | 成都鼎桥通信技术有限公司 | Track spring mounting jig |
| CN113759484B (en) * | 2020-06-02 | 2023-08-15 | 成都鼎桥通信技术有限公司 | Rail spring mounting jig |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Su Xiangyun Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Su Xiangyun Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20140715 |
|
| EXPY | Termination of patent right or utility model |