WO2022017274A1 - 镜头支架驱动机构、调节装置以及投影机 - Google Patents

镜头支架驱动机构、调节装置以及投影机 Download PDF

Info

Publication number
WO2022017274A1
WO2022017274A1 PCT/CN2021/106739 CN2021106739W WO2022017274A1 WO 2022017274 A1 WO2022017274 A1 WO 2022017274A1 CN 2021106739 W CN2021106739 W CN 2021106739W WO 2022017274 A1 WO2022017274 A1 WO 2022017274A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
driving mechanism
shaft
lens
bracket
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.)
Ceased
Application number
PCT/CN2021/106739
Other languages
English (en)
French (fr)
Inventor
周建华
刘宪
余新
李屹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Appotronics Corp Ltd
Original Assignee
Appotronics Corp Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Publication of WO2022017274A1 publication Critical patent/WO2022017274A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details

Definitions

  • the present application belongs to the technical field of projection, and more particularly, relates to a lens support driving mechanism, an adjusting device and a projector.
  • the lens holder adjusting device not only supports the lens, but also has the function of adjusting the position of the lens.
  • the position adjustment function of the lens holder is particularly important.
  • the lens holder adjustment device includes a drive motor, a lens holder and an adapter.
  • the lens assembly is installed in the lens holder.
  • the drive motor drives the lens holder to move in a preset direction through the adapter, so that the lens assembly can move with the lens holder to an ideal position. state.
  • the adapter is prone to deformation or stuck position adjustment, which affects the normal use of the adjustment device.
  • a new adapter needs to be replaced, and the adapter often needs to be replaced as a whole during replacement, which leads to high production cost and is not conducive to reducing the production cost of the lens holder adjustment device.
  • the objects of the present application include, for example, to provide a lens holder driving mechanism, an adjustment device and a projector to improve the above-mentioned problems.
  • a lens support driving mechanism including a driving member, a shaft sleeve and a fixing member.
  • the driver has a drive shaft
  • the shaft sleeve includes a sleeve body
  • the sleeve body is sleeved on the drive shaft and is threadedly connected with the drive shaft
  • the outer side wall of the sleeve body includes a first connection portion.
  • the fixing piece includes a fixing body and a second connecting part connected to the fixing body, and the second connecting part is detachably connected with the first connecting part.
  • the driving part is used to be fixed on the lens fixing bracket
  • the fixing part is used to be fixed on the lens moving bracket.
  • the fixing member is made of metal material
  • the shaft sleeve is made of plastic material.
  • the sleeve body is a circular ring
  • the first connection part is provided with an external thread
  • the second connection part is provided with a threaded hole matched with the first connection part
  • the second connection part is sleeved on the first connection part and is connected with the first connection part.
  • the connection part is threaded.
  • an elastic member is also included, the elastic member is sleeved on the drive shaft, and one end of the elastic member close to the fixing member abuts the shaft sleeve or the fixing member, so that the shaft sleeve has a pre-tightening force toward the extending direction of the driving shaft.
  • the shaft sleeve further comprises an abutting portion protruding on the outer side wall of the sleeve body, the abutting portion is located on the side of the first connecting portion away from the second connecting portion; one end of the elastic piece abuts against the driving piece, and the other end abuts against the driving piece. connected to the contact part.
  • the limit sleeve includes a sleeve and a limit part connected to the sleeve, and the inner side wall of the sleeve is provided with an inner thread matched with the drive shaft.
  • the shaft sleeve further includes an abutting part and a guiding part connected to the sleeve body, the guiding part is located at one end of the sleeve body away from the first connecting part, the abutting part is located between the first connecting part and the guiding part, and the abutting part is protrudingly arranged on the end of the sleeve body away from the first connecting part.
  • the sleeve is inserted into the guide part and can rotate synchronously with respect to the drive shaft.
  • the elastic part is sleeved on the sleeve and the guide part, and the limit sleeve and the shaft sleeve are sleeved in turn.
  • One end of the elastic piece abuts against the limiting portion, and the other end abuts against the abutting portion.
  • the side wall of the sleeve matched with the guide portion is a non-circular structure
  • the side wall of the guide portion matched with the sleeve is of a non-circular structure matched with the side wall of the sleeve.
  • the side wall where the sleeve cooperates with the guide part is provided with a first clamping part
  • the side wall where the guide part cooperates with the sleeve is provided with a second clamping part
  • both the first clamping part and the second clamping part are provided.
  • One of them is a protrusion and the other is a groove.
  • a lens support adjusting device including a first support, a second support, a lens holder, and a lens support drive mechanism.
  • the second bracket is slidably connected to the first bracket along the first direction.
  • the lens holder is slidably connected to the second bracket along a second direction having an included angle with the first direction.
  • the number of lens holder driving mechanisms is two, and they are respectively a first driving mechanism and a second driving mechanism.
  • the driving member in the first driving mechanism is fixed to the first bracket, the fixing member in the first driving mechanism is fixed to the second bracket, and the first driving mechanism is used to drive the second bracket and the lens holder along the first bracket relative to the first bracket. Swipe in the direction.
  • the driving member in the second driving mechanism is fixed on the second bracket, the fixing member in the second driving mechanism is fixed on the lens holder, and the second driving mechanism is used to drive the lens holder to slide relative to the second holder along the second direction.
  • a projector which includes a lens assembly and a lens bracket adjusting device, and the lens assembly is mounted on a lens holder.
  • the lens support driving mechanism provided by the embodiments of the present application, by detachably connecting the shaft sleeve and the fixing member, when the driving mechanism is damaged in the process of driving the lens assembly to adjust the position of the projected image, only the threaded connection with the driving shaft can be replaced.
  • the shaft sleeve can be used, which is beneficial to reduce the production cost.
  • FIG. 1 is a schematic diagram of a structure of a lens support driving mechanism provided by an embodiment of the application.
  • FIG. 2 is an exploded schematic view of a lens support driving mechanism provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a perspective view of a shaft sleeve in a lens support driving mechanism provided by an embodiment of the present application;
  • FIG. 4 is a schematic diagram of another structure of the lens support driving mechanism provided by the embodiment of the application.
  • Fig. 5 is the structural representation of the limit sleeve in Fig. 4;
  • FIG. 6 is a cross-sectional view of FIG. 4;
  • Fig. 7 is the structural schematic diagram of another perspective of the shaft sleeve in Fig. 4;
  • Fig. 8 is the enlarged schematic diagram of A place in Fig. 6;
  • FIG. 9 is a schematic structural diagram of a lens support adjusting device provided by an embodiment of the present application.
  • FIG. 10 is an exploded schematic view of the lens holder adjusting device provided by the embodiment of the present application.
  • Icons 100-lens holder drive mechanism; 110-drive part; 112-drive shaft; 120-sleeve; 121-sleeve body; 123-first connection part; 125-abutment part; 127-guide part; 129-th 130-fixing part; 131-fixing body; 133-second connecting part; 140-elastic part; 150-limiting sleeve; 151-sleeve; 153-limiting part; 155-first snap-connection part; 200-lens bracket adjustment device; 201-first direction; 203-second direction; 210-first bracket; 212-first rail; 220-second bracket; 222-second rail; 230-lens holder ; 240 - the first drive mechanism; 250 - the second drive mechanism.
  • the lens assembly of the projection equipment is installed in the lens bracket adjusting device, which functions to support the lens assembly on the one hand, and adjust the position of the projection screen of the lens assembly on the other hand.
  • the lens bracket adjusting device may include a lens fixing bracket, a lens moving bracket and a driving mechanism, the lens assembly is installed in the lens moving bracket, and the driving mechanism is used to drive the lens moving bracket to move relative to the lens fixing bracket, so as to adjust the projection image of the lens assembly Location.
  • an embodiment of the present application provides a lens holder driving mechanism 100 .
  • the lens holder driving mechanism 100 may include a driving member 110 , a shaft sleeve 120 and a fixing member 130 .
  • the shaft sleeve 120 is threadedly connected to the drive shaft 112 of the driving member 110 , and the fixing member 130 is detachably connected to the shaft sleeve 120 .
  • the driving member 110 is fixed on the lens fixing bracket
  • the fixing member 130 is fixedly connected to the lens moving bracket
  • the rotation of the driving shaft 112 is converted into the axial movement of the sleeve 120 along the driving shaft 112 through the screw connection, so that the lens
  • the moving bracket moves relative to the lens fixing bracket, so as to adjust the specific position of the projection image of the lens bracket.
  • the driving member 110 includes a driving shaft 112 .
  • the driving shaft 112 is in a state of rotating around its own axis.
  • the shaft sleeve 120 is a sleeve-like structure.
  • the shaft sleeve 120 includes a sleeve body 121 , and the sleeve body 121 is sleeved on the drive shaft 112 .
  • the outer peripheral wall of the drive shaft 112 is provided with an external thread
  • the inner side wall of the sleeve body 121 is provided with a connection with the drive shaft 112 .
  • the external thread matches the internal thread, so that the sleeve body 121 and the drive shaft 112 are threadedly connected.
  • the outer side wall of the sleeve body 121 includes a first connecting portion 123
  • the fixing member 130 includes a fixing body 131 and a second connecting portion 133
  • the second connecting portion 133 is fixedly connected with the fixing body 131
  • the fixing body 131 is used for moving with the lens
  • the bracket is fixedly connected
  • the second connecting portion 133 is detachably connected to the first connecting portion 123 of the sleeve body 121 , so as to achieve the purpose of detachably connecting the shaft sleeve 120 and the fixing member 130 .
  • the existing lens holder adjusting device adjusts the position of the lens assembly for a certain number of times, it is easy to cause damage to the adapter in the drive mechanism, which cannot meet the requirements of precise adjustment of the position of the lens assembly, and is often improved by replacing the adapter. This situation.
  • the overall replacement of the adapter is not conducive to the reduction of production costs.
  • the lens holder driving mechanism 100 provided by the embodiment of the present application is detachably connected to the shaft sleeve 120 and the fixing member 130. When the adapter is damaged At this time, only the shaft sleeve 120 threadedly connected with the drive shaft 112 can be replaced, and the fixing member 130 can continue to be used, thereby reducing the production cost.
  • the inventor also found in the research that when the adaptor in the driving mechanism is made of plastic material, the drive member 110 adjusts the position of the projection lens through the adaptor of plastic material, and the adaptor is prone to a large amount of stress after being stressed.
  • the deformation of the amplitude affects the transmission accuracy of the driving member 110 to a certain extent, and further affects the positional accuracy of the projection image.
  • the adapter in the drive mechanism is made of metal material
  • the drive shaft 112 of the drive element 110 and the adapter made of metal have high requirements on the installation accuracy of the adapter in the transmission connection, otherwise the adapter transmission is very likely to occur. Unsmooth, or even stuck and unable to run.
  • the fixing member 130 is made of metal material
  • the shaft sleeve 120 is made of plastic material. That is, the plastic shaft sleeve 120 is threadedly connected to the drive shaft 112, and the plastic shaft sleeve 120 itself is deformed by force to compensate for the problem of transmission jamming and unsmooth transmission caused by the installation error of the drive shaft 112;
  • the fixing member 130 and the plastic bushing 120 are detachably connected to improve the transmission accuracy and stability problems caused by the variability in the connection between the drive shaft 112 and the adapter member.
  • the sleeve body 121 is a circular ring, and the first connecting portion 123 is an external thread disposed on the outer side wall of the circular ring.
  • the second connecting portion 133 of the fixing member 130 is provided with a threaded hole matched with the first connecting portion 123.
  • the second connecting portion 133 of the fixing member 130 is sleeved on the first connecting portion 123 of the sleeve body 121, and the second connecting portion 133 is sleeved on the first connecting portion 123 of the sleeve body 121.
  • the two connecting parts 133 are screwed with the first connecting part 123 .
  • the inner side wall of the plastic casing body 121 is provided with internal threads
  • the first connecting portion 123 of the outer side wall is provided with external threads
  • the casing body 121 is threadedly connected to the drive shaft 112
  • the metal fixing member 130 is connected to the plastic casing body.
  • the outer side wall is threaded for easy installation.
  • the lens support driving mechanism 100 provided by the embodiment of the present application can improve the structural strength of the combined adapter formed by the fixing member 130 and the shaft sleeve 120 by using the metal fixing member 130 and the plastic material shaft sleeve 120, and reduce the combination
  • the adaptor is twisted and deformed under force, and in addition, the jamming phenomenon in the threaded connection between the metal adaptor and the drive shaft 112 is improved.
  • the material of the shaft sleeve 120 may be POM (polyformaldehyde thermoplastic crystalline polymer, polyoxymethylene for short) with high strength and good wear resistance
  • the material of the fixing seat may be stainless steel.
  • the drive shaft 112 of the drive member 110 needs to meet certain accuracy requirements, for example, the shaft runout accuracy of the drive shaft 112 is greater than or equal to 0.1 mm, and the straightness of the drive shaft 112 is greater than or equal to 0.02 mm.
  • the inventor also found in the research that there is a problem of thread fit clearance during the drive connection between the drive shaft 112 and the shaft sleeve 120 . That is to say, the shaft sleeve 120 and the drive shaft 112 are driven by threaded connection. When the shaft sleeve 120 is adjusted in place, a certain return error will occur, thereby reducing the accuracy of position adjustment.
  • the lens support driving mechanism 100 provided in this embodiment of the present application further includes an elastic member 140 .
  • the elastic member 140 is sleeved on the drive shaft 112 , and one end of the elastic member 140 close to the fixing member 130 abuts against the shaft sleeve 120 or the fixing member 130 , so that the shaft sleeve 120 has a pretensioning force toward the extending direction of the driving shaft 112 .
  • the shaft sleeve 120 can improve the return error caused by the thread fit clearance under the action of the pre-tightening force of the elastic member 140 .
  • the shaft sleeve 120 further includes an abutting portion 125 protruding from the outer side wall of the sleeve body 121 .
  • the elastic member 140 is sleeved on the shaft sleeve 120
  • the shaft sleeve 120 is sleeved on the driving shaft 112 and is threadedly connected
  • the fixing member 130 is sleeved on the shaft
  • the sleeve 120 is threadedly connected, one end of the elastic member 140 abuts against the driving member 110 , and the other end abuts against the abutting portion 125 of the shaft sleeve 120 , so that the elastic member 140 is compressed to generate a pre-tightening thrust.
  • the preload force generated by the elastic member 140 is a non-constant preload force.
  • the drive shaft 112 and the drive shaft 112 are driven along the axial direction of the drive shaft 112.
  • the compression amount of the elastic member 140 between the shaft sleeve 120 and the driving member 110 is different, resulting in elastic The preload is different.
  • the shaft sleeve 120 further includes a guide portion 127, the guide portion 127 is connected to the side of the abutting portion 125 away from the first connecting portion 123, and the outer diameter of the guiding portion 127 is smaller than the outer diameter of the abutting portion 125, that is, abutting
  • the connecting portion 125 protrudes from the outer sidewall of the sleeve body 121 and the outer sidewall of the guide portion 127 .
  • the abutting portion 125 is located between the first connecting portion 123 and the guide portion 127 , and the guide portion 127 is a hollow annular structure.
  • the elastic member 140 is sleeved on the guide portion 127, which is beneficial to facilitate installation. After installation, the end of the elastic member 140 away from the driving member 110 abuts against the abutting portion 125 , and can telescopically move along the guide portion 127 .
  • the lens holder driving mechanism 100 further includes a limiting sleeve 150 .
  • the limit sleeve 150 cooperates with the shaft sleeve 120 and the drive shaft 112 at the same time, and the limit sleeve 150 and the shaft sleeve 120 are synchronously driven relative to the drive shaft 112 , and the elastic member 140 is disposed on the shaft sleeve 120 and the limit sleeve 150 In between, the preload force generated by the compression of the elastic member 140 is a constant preload force.
  • the synchronous transmission of the limit sleeve 150 and the shaft sleeve 120 relative to the drive shaft 112 means that the limit sleeve 150 and the shaft sleeve 120 rotate synchronously relative to the drive shaft 112 and move along the axial direction of the drive shaft 112 at the same time.
  • the compression amount of the elastic member 140 is made constant.
  • the compression amount of the elastic member 140 can be preset, and the pre-tightening force corresponding to the compression amount is greater than or equal to the maximum driving thrust of the lens holder.
  • the limiting sleeve 150 includes a sleeve 151 and a limiting portion 153 connected to the sleeve 151 .
  • the inner side wall of the sleeve 151 is provided with an inner thread matched with the drive shaft 112 , and the limiting portion 153 protrudes from the outer side wall of the sleeve 151 .
  • the outer diameter of the limiting portion 153 is larger than the outer diameter of the sleeve 151;
  • the diameter of the circumscribed circle of the limiting portion 153 is larger than the diameter of the circumscribed circle of the sleeve 151;
  • the outer diameter is larger than the diameter of the circumscribed circle of the sleeve 151.
  • the limiting portion 153 protrudes from the outer side wall of the sleeve 151.
  • the limiting portion 153 and the abutting portion 125 of the shaft sleeve 120 abut and cooperate with the elastic member 140 respectively to realize compression.
  • the elastic member 140 acts as a constant preload.
  • FIG. 6 there is a limiting space between the limiting portion 153 of the limiting sleeve 150 and the abutting portion 125 of the shaft sleeve 120 , and the elastic member 140 is sleeved on the sleeve 151 and the guiding portion 127 , and is limited within the limit.
  • the position portion 153 and the abutting portion 125 are pressed with a certain pre-tightening force.
  • the limit sleeve 150 and the shaft sleeve 120 are sequentially sleeved on the drive shaft 112 and are simultaneously connected with the drive shaft 112 in a threaded connection.
  • One end of the elastic member 140 abuts against the limit portion 153 and the other end abuts against the abutment portion. 125 , the elastic member 140 has a constant preload force under the action of the limiting portion 153 and the abutting portion 125 .
  • the limit sleeve 150 , the shaft sleeve 120 and the fixing member 130 are synchronously transmitted along the drive shaft 112 .
  • the compression amount of the elastic member 140 is constant, and the generated pre-tightening force is constant.
  • the guide portion 127 of the shaft sleeve 120 is inserted into the sleeve 151 of the limit sleeve 150 , and after the insertion, the shaft sleeve 120 and the limit sleeve 150 rotate synchronously relative to the drive shaft 112 .
  • the side wall of the sleeve 151 and the guide portion 127 can be designed to be non-circular, and the side wall of the guide portion 127 and the sleeve 151 is also designed to match the side wall of the sleeve 151 accordingly.
  • Non-circular structures such as rectangles, triangles, ovals, etc. So that the sleeve 151 and the guide portion 127 are relatively fixed in the circumferential direction after being inserted, so as to achieve the purpose of synchronous rotation around the drive shaft 112 .
  • the outer sidewall of the sleeve 151 matches the inner sidewall of the guide portion 127 .
  • the outer side wall of the sleeve 151 can be designed to be a non-circular structure
  • the inner side wall of the guide portion 127 can be designed to be a non-circular structure matching the outer side wall of the sleeve 151 .
  • the outer side wall of the guide portion 127 matches the inner side wall of the sleeve 151 .
  • the outer sidewall of the guide portion 127 can be designed as a non-circular structure
  • the inner sidewall of the sleeve 151 is designed as a non-circular structure matching the outer sidewall of the guide portion 127 .
  • the cross-sectional shape of the inner sidewall of the guide portion 127 is designed as a rectangular structure, and the cross-sectional shape of the outer sidewall of the portion of the limiting sleeve 150 that cooperates with the guide portion 127 is also designed as a rectangular structure accordingly.
  • the inner side wall of the limiting sleeve 150 and the inner side wall of the shaft sleeve 120 are both provided with inner threads, they are respectively connected with the outer threads of the drive shaft 112 in a transmission and connection at the same time.
  • the limiting sleeve 150 , the elastic member 140 and the shaft sleeve 120 are plugged and installed on the drive shaft 112 as an integral component.
  • the internal thread of the limiting sleeve 150 can be avoided.
  • the internal thread of the shaft sleeve 120 is misaligned, which leads to the problem of installation stuck.
  • the limit sleeve 150 and the shaft sleeve 120 can be plugged and fixed first, and the tapping is performed as a whole, that is, the limit sleeve 150 and the shaft sleeve 120 can be processed simultaneously.
  • the inner thread of the shaft sleeve 120 so that the thread at the connection will not be misaligned.
  • a first engaging portion 155 is provided on the side wall of the sleeve 151 and the guide portion 127 , correspondingly, the guide portion 127
  • the side wall matched with the sleeve 151 is provided with a second engaging portion 129 .
  • the first clamping portion 155 and the second clamping portion 129 are clamped, so as to prevent fools.
  • one of the first engaging portion 155 and the second engaging portion 129 is a protrusion, and the other is a groove.
  • the elastic member 140 is sleeved on the limit sleeve 150 and the shaft sleeve 120 , the limit sleeve 150 and the shaft sleeve 120 are threadedly connected to the drive shaft 112 at the same time, and the inner thread of the limit sleeve 150 and the shaft The inner thread of the sleeve 120 is threadedly connected with the outer thread of the drive shaft 112 .
  • the limit sleeve 150 and the shaft sleeve 120 will move synchronously along the axis of the drive shaft 112, and the limit space between the limit portion 153 and the abutment portion 125 remains unchanged, and the compression of the elastic member 140 The amount remains unchanged, and the preload force generated by the compression of the elastic member 140 also remains unchanged. And the pre-tightening force of the elastic member 140 pushes the limit sleeve 150 and the shaft sleeve 120 to both sides respectively, so that the side of the inner thread of the shaft sleeve 120 away from the limit sleeve 150 always abuts the side of the outer thread of the drive shaft 112.
  • the side of the inner thread of the limiting sleeve 150 away from the shaft sleeve 120 is always in contact with the other side of the outer thread of the drive shaft 112, that is, the inner thread of the shaft sleeve 120 and the inner thread of the limiting sleeve 150 are always in contact with the drive shaft.
  • the opposite sides of the external thread on the 112 abut against, thereby improving the return error caused by the fitting clearance of the threaded connection.
  • the shaft sleeve 120 is detachably connected with the fixing member 130 , the shaft sleeve 120 is made of plastic material, and the fixing member 130 is made of metal material.
  • the problem of poor accuracy caused by the large deformation of the plastic adapter during the transmission of the drive shaft 112 is improved, the overall structural strength of the drive mechanism is improved, and the occurrence of force and twisting during the transmission process is reduced. deformation.
  • the metal adapter is threadedly connected to the drive shaft 112 the problem of transmission jamming and unsmoothness caused by manufacturing and installation errors is improved.
  • the problem of the return error caused by the clearance of the thread fit when the drive shaft 112 and the shaft sleeve 120 are threadedly driven can be improved. It is beneficial to improve the accuracy and stability of the position adjustment of the lens assembly, and can quickly and conveniently move the projection image of the lens assembly to an ideal position, thereby improving the adjustment efficiency.
  • the embodiment of the present application further provides a lens holder adjusting device 200 , please refer to FIG. 9 and FIG. 10 , the lens holder adjusting device 200 may include a first holder 210 , a second holder 220 , a lens holder 230 and the above-mentioned lens The carriage drive mechanism 100 .
  • the first bracket 210 is a fixed bracket placed on a desktop or a workbench; the second bracket 220 is slidably connected to the first bracket 210 along the first direction 201 , so that the second bracket 220 can be slidably connected to the first bracket 210 relative to the first bracket 210 .
  • the second bracket 220 When the second bracket 220 slides relative to the first bracket 210 , the second bracket 220 will drive the lens holder 230 to move synchronously in the first direction 201 , and then move in the second direction 203 relative to the second bracket 220 through the lens holder 230 , the position adjustment of the lens holder 230 in the plane is realized.
  • lens mount driving mechanisms 100 there are two lens mount driving mechanisms 100 , which are a first driving mechanism 240 and a second driving mechanism 250 respectively.
  • the first driving mechanism 240 is installed between the first bracket 210 and the second bracket 220 for driving the second bracket 220 to slide relative to the first bracket 210 in the first direction 201 .
  • the second driving mechanism 250 is installed between the second bracket 220 and the lens holder 230 to drive the lens holder 230 to slide relative to the second holder 220 along the second direction 203 .
  • the first direction 201 and the second direction 203 are perpendicular, and when the first direction 201 is the X-axis direction, the second direction 203 is the Y-axis direction, so that one of the two driving mechanisms drives the lens holder 230 along the Moving in the up and down direction, the other drives the lens holder 230 to move in the horizontal direction.
  • a first guide rail 212 is disposed between the first support 210 and the second support 220 , the first guide rail 212 extends along the first direction 201 , and the first driving mechanism 240 drives the second support 220 to slide along the first guide rail 212 .
  • a second guide rail 222 is disposed between the second bracket 220 and the lens holder 230 , the second guide rail 222 extends along the second direction 203 , and the second driving mechanism 250 drives the lens holder 230 to slide along the second guide rail 222 .
  • the driving member 110 of the first driving mechanism 240 is fixed to the first bracket 210
  • the fixing member 130 of the first driving mechanism 240 is fixed to the second bracket 220 .
  • the bushing 120 drives the second bracket 220 and the lens holder 230 to slide relative to the first bracket 210 along the first direction 201 through the fixing member 130 .
  • the driving member 110 in the first driving mechanism 240 is fixedly connected to the first bracket 210 through a motor base, and the fixing member 130 in the first driving mechanism 240 is fixedly connected to the second bracket 220 by using bolts.
  • the driving member 110 of the second driving mechanism 250 is fixed to the second bracket 220
  • the fixing member 130 of the second driving mechanism 250 is fixed to the lens holder 230 .
  • the shaft sleeve 120 drives the lens holder 230 to slide relative to the second bracket 220 along the second direction 203 through the fixing member 130 .
  • the driving member 110 in the second driving mechanism 250 is fixedly connected to the second bracket 220 through a motor seat, and the fixing member 130 in the second driving mechanism 250 is fixedly connected to the lens holder 230 by bolts.
  • the lens bracket adjusting device adjusts the position of the lens assembly
  • the projection image of the lens assembly needs to be adjusted to the designated position according to the preset position through the driving mechanism, and the accuracy of the designated position has certain requirements.
  • the inventor has found in many tests that when the entire adaptor connected to the drive shaft 112 is made of plastic material, the adaptor is easily deformed by force during the adjustment process, which in turn affects the adjustment of the position. accuracy.
  • the whole of the adapter that is connected to the drive shaft 112 is made of metal material, the problem of unsmooth transmission, stuck or even unable to operate due to the precision of the thread fit during the transmission process is caused.
  • the metal fixing member 130 and the plastic shaft sleeve 120 are detachably connected, which can not only improve the stuck phenomenon that occurs during screw transmission , and can improve the accuracy of position adjustment caused by force deformation, and even if the shaft sleeve 120 connected to the drive shaft 112 is damaged during the transmission process, only the shaft sleeve 120 needs to be replaced, reducing the number of replacement parts and reducing Cost of production.
  • the elastic member 140 by arranging the elastic member 140, the problem of thread fit clearance of the threaded connection can be improved; through the cooperation of the limit sleeve 150, the elastic member 140 and the shaft sleeve 120, when the drive shaft 112 is driven to any position, the elastic member 140 has a constant
  • the pre-tightening force is beneficial to eliminate the thread play between the drive shaft 112 and the shaft sleeve 120, avoid motion idle travel and return travel errors, and at the same time ensure the smoothness of the drive mechanism transmission.
  • the embodiment of the present application also provides a projector, which includes a lens assembly and the above-mentioned lens bracket adjustment device.
  • the lens assembly is mounted on a lens bracket 230 in the lens bracket adjustment device, and the lens bracket 230 is driven to move by a driving mechanism, so that the lens bracket 230 is moved to make
  • the projected image of the lens assembly can be quickly moved to an ideal position, and the accuracy and smoothness of adjusting the position of the lens assembly and the stability of the lens assembly during operation can be improved.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Lens Barrels (AREA)

Abstract

一种镜头支架驱动机构（100）、镜头支架调节装置（200）以及投影机。镜头支架驱动机构（100）包括具有驱动轴（112）的驱动件（110）、轴套（120）以及固定件（130）。轴套（120）包括套本体（121），套本体（121）套设于驱动轴（112）且与驱动轴（112）螺纹连接，套本体（121）的外侧壁包括第一连接部（123）。固定件（130）包括固定本体（131）和连接于固定本体（131）的第二连接部（133），第二连接部（133）与第一连接部（123）可拆卸连接。驱动件（110）用于固定在镜头固定支架上，固定件（130）用于固定在镜头移动支架上，当驱动轴（112）转动时，轴套（120）沿驱动轴（112）轴向移动，以使镜头移动支架相对于镜头固定支架沿驱动轴（112）的轴向移动。镜头支架调节装置（200）包括第一支架（210）、第二支架（220）、镜头卡架（230）以及镜头支架驱动机构（100）。镜头支架驱动机构（100）将轴套（120）和固定件（130）可拆卸连接，便于维修更换，有利于降低生产成本。

Description

镜头支架驱动机构、调节装置以及投影机 技术领域
本申请属于投影技术领域，更具体地，涉及一种镜头支架驱动机构、调节装置以及投影机。
背景技术
在投影机产品中，镜头支架调节装置除了支撑镜头外，还具有调节镜头位置的作用。对于大型的影院机型，例如影院投影机系列、工程投影机系列等产品而言，为了实现投影图像能够调节至理想位置，镜头支架的位置调节功能尤为重要。
镜头支架调节装置包括驱动电机、镜头支架以及转接件，镜头组件安装在镜头支架中，驱动电机通过转接件驱动镜头支架沿预设方向运动，以使镜头组件可以随镜头支架运动至理想的状态。
然而，当驱动电机通过转接件驱动镜头支架移动一定次数后，转接件容易发生变形或者出现位置调节卡顿的现象，从而影响调节装置的正常使用。这时，需要更换新的转接件，且转接件在更换时往往需要整体更换，导致生产成本高，不利于降低镜头支架调节装置的生产成本。
实用新型内容
本申请的目的包括，例如，提供了一种镜头支架驱动机构、调节装置以及投影机，以改善上述的问题。
本申请的实施例可以这样实现：
第一方面，提供一种镜头支架驱动机构，包括驱动件、轴套以及固定件。驱动件具有驱动轴，轴套包括套本体，套本体套设于驱动轴且与驱动轴螺纹连接，套本体的外侧壁包括第一连接部。固定件包括固定本体和连 接于固定本体的第二连接部，第二连接部与第一连接部可拆卸连接。驱动件用于固定在镜头固定支架上，固定件用于固定在镜头移动支架上，当驱动轴转动时，轴套沿驱动轴轴向移动，以使镜头移动支架相对于镜头固定支架沿驱动轴的轴向移动。
进一步地，固定件为金属材质，轴套为塑胶材质。
进一步地，套本体为圆环，第一连接部设置有外螺纹，第二连接部开设有与第一连接部相配合的螺纹孔，第二连接部套设于第一连接部且与第一连接部螺纹连接。
进一步地，还包括弹性件，弹性件套设于驱动轴，且弹性件靠近固定件的一端抵接于轴套或者固定件，以使轴套具有朝向驱动轴延伸方向的预紧力。
进一步地，轴套还包括凸设于套本体外侧壁的抵接部，抵接部位于第一连接部的远离第二连接部的一侧；弹性件的一端抵接于驱动件，另一端抵接于抵接部。
进一步地，还包括限位套，限位套包括套筒和连接于套筒的限位部，套筒的内侧壁设置有与驱动轴配合的内螺纹。轴套还包括连接于套本体的抵接部和导向部，导向部位于套本体远离第一连接部的一端，抵接部位于第一连接部和导向部之间，且抵接部凸设于套本体的外侧壁和导向部的外侧壁。套筒与导向部插接，且能够相对于驱动轴同步转动，限位部与抵接部之间具有限位空间，弹性件套设于套筒和导向部，限位套和轴套依次套设于驱动轴且与驱动轴螺纹连接，弹性件的一端抵接于限位部，另一端抵接于抵接部。
进一步地，套筒与导向部配合的侧壁为非圆形结构，导向部与套筒配合的侧壁为与套筒侧壁相匹配的非圆形结构。
进一步地，套筒与导向部配合的侧壁设置有第一卡接部，导向部与套筒配合的侧壁设置有第二卡接部，第一卡接部和第二卡接部二者之中的其中一个为凸起，另外一个为凹槽。当套筒与导向部插接配合时，第一卡接部和第二卡接部卡接。
第二方面，提供一种镜头支架调节装置，包括第一支架、第二支架、镜头卡架以及镜头支架驱动机构。第二支架沿第一方向可滑动的连接于第一支架。镜头卡架沿与第一方向具有夹角的第二方向可滑动的连接于第二支架。镜头支架驱动机构数量为两个且分别为第一驱动机构和第二驱动机构。第一驱动机构中的驱动件固定于第一支架，第一驱动机构中的固定件固定于第二支架，第一驱动机构用于驱动第二支架和镜头卡架相对于第一支架沿第一方向滑动。第二驱动机构中的驱动件固定于第二支架，第二驱动机构中的固定件固定于镜头卡架，第二驱动机构用于驱动镜头卡架相对于第二支架沿第二方向滑动。
第三方面，提供一种投影机，包括镜头组件以及镜头支架调节装置，镜头组件安装于镜头卡架。
本申请实施例提供的镜头支架驱动机构，通过将轴套和固定件可拆卸连接，当驱动机构在驱动镜头组件对投影图像的位置进行调节过程中发生损坏时，可以仅更换与驱动轴螺纹连接的轴套即可，有利于降低生产成本。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请实施例提供的镜头支架驱动机构一种结构的示意图；
图2为本申请实施例提供的镜头支架驱动机构的分解示意图；
图3为本申请实施例提供的镜头支架驱动机构中轴套一视角的结构示意图；
图4为本申请实施例提供的镜头支架驱动机构又一种结构的示意图；
图5为图4中限位套的结构示意图；
图6为图4是剖视图；
图7为图4中轴套的另一视角的结构示意图；
图8为图6中A处的放大示意图；
图9为本申请实施例提供的镜头支架调节装置的结构示意图；
图10为本申请实施例提供的镜头支架调节装置的分解示意图。
图标：100-镜头支架驱动机构；110-驱动件；112-驱动轴；120-轴套；121-套本体；123-第一连接部；125-抵接部；127-导向部；129-第二卡接部；130-固定件；131-固定本体；133-第二连接部；140-弹性件；150-限位套；151-套筒；153-限位部；155-第一卡接部；200-镜头支架调节装置；201-第一方向；203-第二方向；210-第一支架；212-第一导轨；220-第二支架；222-第二导轨；230-镜头卡架；240-第一驱动机构；250-第二驱动机构。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
需要说明的是，在不冲突的情况下，本申请的实施例中的特征可以相互结合。
投影设备的镜头组件安装在镜头支架调节装置中，一方面起支撑镜头组件的作用，另一方面起调节镜头组件的投影画面位置的作用。其中，镜头支架调节装置可以包括镜头固定支架、镜头移动支架以及驱动机构，镜头组件安装于镜头移动支架中，驱动机构用于驱动镜头移动支架相对于镜头固定支架运动，从而调节镜头组件的投影画面位置。
请参照图1，本申请实施例提供了一种镜头支架驱动机构100，该镜头支架驱动机构100可以包括驱动件110、轴套120以及固定件130。
其中，轴套120与驱动件110的驱动轴112螺纹连接，固定件130可拆卸连接于轴套120上。安装时，驱动件110固定在镜头固定支架上，固定件130固定连接于镜头移动支架上，通过螺纹连接将驱动轴112的转动 转换为轴套120沿驱动轴112的轴向移动，从而使得镜头移动支架相对于镜头固定支架运动，进而调节镜头支架投影画面的具体位置。
具体地，请参照图2，驱动件110包括驱动轴112，当驱动件110工作时，驱动轴112处于绕自身轴线转动的状态。轴套120为套筒状结构，轴套120包括套本体121，套本体121套设于驱动轴112上。为了实现将驱动轴112的转动转化为轴套120沿驱动轴112轴向的移动，可选地，驱动轴112的外周壁设置有外螺纹，套本体121的内侧壁设置有与驱动轴112的外螺纹相匹配的内螺纹，以使套本体121与驱动轴112螺纹连接。
进一步地，套本体121的外侧壁包括第一连接部123，固定件130包括固定本体131和第二连接部133，第二连接部133与固定本体131固定连接，固定本体131用于和镜头移动支架固定连接，第二连接部133与套本体121的第一连接部123可拆卸连接，从而实现了轴套120与固定件130可拆卸连接的目的。
由于现有的镜头支架调节装置调节镜头组件的位置达到或者超过一定次数后，容易导致驱动机构中的转接件损坏，无法满足镜头组件位置精确调节的要求，往往是通过更换转接件来改善这种情况。然而，转接件整体更换不利于生产成本的降低。发明人在研究中发现往往是转接件与驱动轴112连接的部分容易损坏，本申请实施例提供的镜头支架驱动机构100通过将轴套120与固定件130可拆卸连接，当转接件损坏时，可以仅更换与驱动轴112螺纹连接的轴套120即可，固定件130可以继续使用，从而降低生产成本。
另外，发明人在研究中还发现，当驱动机构中的转接件采用塑胶材质时，驱动件110通过塑胶材质的转接件调节投影镜头的位置，转接件在受力后容易发生较大幅度的变形，一定程度上影响驱动件110传动的准确性，进而影响投影画面的位置精度。当驱动机构中的转接件采用金属材质时，驱动件110的驱动轴112与金属材质的转接件在传动连接中对转接件的安装精度要求较高，否则极易出现转接件传动不顺畅、甚至卡死无法运转的现象。可选地，本申请实施例提供的镜头支架驱动机构100中，固定件130采用金属材质，轴套120采用塑胶材质。即通过塑胶材质的轴套120与驱 动轴112螺纹连接，通过塑胶材质的轴套120自身受力变形来弥补驱动轴112的安装误差所造成的传动卡顿、传动不顺畅问题；通过金属材质的固定件130与塑胶轴套120可拆卸连接，改善驱动轴112与转接件连接时存在的易变性而导致的传动准确性和稳定性的问题。
请参照图3，套本体121为圆环，第一连接部123为设置于圆环外侧壁的外螺纹。固定件130的第二连接部133开设有与第一连接部123相配合的螺纹孔，安装时，固定件130的第二连接部133套设于套本体121的第一连接部123，且第二连接部133与第一连接部123螺纹连接。也就是说，塑胶材质的套本体121内侧壁设置有内螺纹，外侧壁的第一连接部123设置有外螺纹，套本体121与驱动轴112螺纹连接，金属固定件130与塑胶材质的套本体121外侧壁螺纹连接，安装方便。一方面改善了采用塑胶材质导致大幅度变形所造成的传动准确性问题，另一方面改善了采用金属材质所出现的传动不顺畅甚至卡死的问题。
本申请实施例提供的镜头支架驱动机构100通过采用金属材质的固定件130和塑胶材质的轴套120，可以提高由固定件130和轴套120形成的组合转接件的结构强度，减小组合转接件的受力扭动形变，另外，改善金属材质的转接件与驱动轴112螺纹连接传动中的卡顿现象。
可选地，轴套120的材质可以采用强度高、耐磨性好的POM(polyformaldehyde热塑性结晶聚合物，简称聚甲醛)，固定座的材质可以采用不锈钢。驱动轴112与轴套120之间的螺纹连接，轴套120与固定件130之间的螺纹连接，在保证顺畅传动的前提下可以保持紧配合的连接方式，有利于压缩螺纹间隙。
为了进一步保证驱动件110在传动过程中的传动顺畅性，以避免驱动件110在传动过程中出现的卡顿、运行速度不稳定的现象。可选地，驱动件110的驱动轴112需满足一定的精度要求，例如，驱动轴112的轴跳动精度≥0.1mm，驱动轴112的直线度≥0.02mm等。
另外，发明人在研究中还发现，驱动轴112在与轴套120传动连接的过程中，存在螺纹配合游隙的问题。也就是说，轴套120与驱动轴112采用螺纹连接进行传动，当轴套120调节到位时会产生一定的回程误差，从 而降低位置调节的精确度。可选地，请继续参照图1和图2，本申请实施例提供的镜头支架驱动机构100还包括弹性件140。弹性件140套设于驱动轴112，且弹性件140靠近固定件130的一端抵接于轴套120或者固定件130，以使轴套120具有朝向驱动轴112延伸方向的预紧力。当驱动轴112驱动轴套120运动到位后，轴套120在弹性件140的预紧力作用下可以改善螺纹配合间隙导致的回程误差。
具体地，请继续参照图3，轴套120还包括了凸设于套本体121外侧壁的抵接部125，抵接部125位于第一连接部123的远离第二连接部133的一侧。当弹性件140、轴套120以及固定件130安装于驱动轴112上时，弹性件140套设于轴套120，轴套120套设于驱动轴112且螺纹连接，固定件130套设于轴套120且螺纹连接，弹性件140的一端抵接于驱动件110，另一端抵接于轴套120的抵接部125，以使弹性件140被压缩产生预紧推力。当弹性件140抵推轴套120时，轴套120的内螺纹与驱动轴112的外螺纹之间紧配合产生摩擦力，且弹性件140推动轴套120压缩轴套120与驱动件110之间的螺纹配合间隙，减少位置调节时的回程误差，从而改善了由于螺纹配合间隙而导致的精确度低的问题。
值得注意的是，该结构的驱动机构中，弹性件140产生的预紧力为非恒定预紧力。驱动轴112驱动轴112套沿驱动轴112的轴向传动，轴套120处于驱动轴112的不同位置时，轴套120和驱动件110之间的弹性件140的压缩量不同，从而产生的弹性预紧力不同。
可选地，轴套120还包括导向部127，导向部127连接于抵接部125的背离第一连接部123的一侧，导向部127的外径小于抵接部125的外径，即抵接部125凸设于套本体121的外侧壁和导向部127的外侧壁，抵接部125位于第一连接部123和导向部127之间，导向部127为空心环状结构。安装时，弹性件140套设于导向部127，有利于方便安装。安装后，弹性件140远离驱动件110的一端抵接于抵接部125，且能够沿导向部127伸缩运动。
作为另一种实施方式，镜头支架驱动机构100还包括限位套150。请参照图4，限位套150同时和轴套120、驱动轴112配合，且限位套150和轴 套120相对于驱动轴112同步传动，弹性件140设置于轴套120和限位套150之间，使得弹性件140被压缩产生的预紧力为恒定预紧力。值得注意的是，限位套150和轴套120相对于驱动轴112同步传动，是指限位套150和轴套120相对于驱动轴112同步转动，且同时沿驱动轴112的轴向移动，使得弹性件140的压缩量恒定不变。可选地，可以预先设定弹性件140的压缩量，且使该压缩量对应的预紧力大于或等于镜头支架的最大驱动推力。
具体地，请参照图5，限位套150包括套筒151和连接于套筒151的限位部153。套筒151的内侧壁设置有与驱动轴112配合的内螺纹，限位部153凸出于套筒151的外侧壁。即当限位部153和套筒151的外侧壁均为圆形结构时，限位部153的外径大于套筒151的外径；当限位部153和套筒151的外侧壁均为非圆结构时，限位部153的外接圆直径大于套筒151的外接圆直径；当限位部153的外侧壁为圆形结构，套筒151的外侧壁为非圆结构时，限位部153的外径大于套筒151的外接圆直径，限位部153凸出于套筒151外侧壁，通过限位部153和轴套120的抵接部125分别与弹性件140抵接配合，实现压缩弹性件140产生恒定预紧力的作用。
进一步地，请参照图6，限位套150的限位部153与轴套120的抵接部125之间具有限位空间，弹性件140套设于套筒151和导向部127，且在限位部153和抵接部125作用下受压具有一定的预紧力。
安装时，限位套150和轴套120依次套设于驱动轴112上，且同时与驱动轴112螺纹连接，弹性件140的一端抵接于限位部153，另一端抵接于抵接部125，弹性件140在限位部153和抵接部125作用下具有恒定的预紧力。当驱动轴112转动时，限位套150、轴套120以及固定件130沿驱动轴112同步传动，传动过程中，弹性件140的压缩量恒定，产生的预紧力恒定。
轴套120的导向部127与限位套150的套筒151插接，且插接后轴套120和限位套150相对于驱动轴112同步转动。
可选地，套筒151与导向部127插接配合的侧壁可以设计为非圆形结构，导向部127与套筒151配合的侧壁也相应的设计为与套筒151侧壁相匹配的非圆形结构，例如，矩形、三角形、椭圆形等。以使套筒151和导向部127插接后在周向上相对固定，实现绕驱动轴112同步转动的目的。 换句话说，当限位套150的套筒151插接于导向部127时，套筒151的外侧壁与导向部127的内侧壁相匹配。例如，套筒151的外侧壁可以设计为非圆形结构，导向部127的内侧壁设计为与套筒151的外侧壁相匹配的非圆形结构。当导向部127插接于套筒151时，导向部127的外侧壁与套筒151的内侧壁相匹配。例如，导向部127的外侧壁可以设计为非圆形结构，套筒151的内侧壁设计为与导向部127的外侧壁相匹配的非圆形结构。
在本申请实施例提供的镜头支架驱动机构100中，请参照图7和图5，限位套150插接于导向部127，限位套150的外侧壁与导向部127的内侧壁相匹配。导向部127的内侧壁横截面形状设计为矩形结构，限位套150的与导向部127配合的部分的外侧壁横截面也相应设计为矩形结构。
由于限位套150的内侧壁和轴套120的内侧壁均设置有内螺纹，且分别与驱动轴112的外螺纹同时传动连接。安装时，限位套150、弹性件140以及轴套120插接作为整体组件安装于驱动轴112上，为了使得整体组件与驱动轴112安装时螺纹连接顺畅，避免由于限位套150的内螺纹和轴套120的内螺纹错位而导致安装卡顿的问题。
进一步地，限位套150的内螺纹和轴套120的内螺纹在加工时，可以先将限位套150和轴套120插接固定，作为整体进行攻丝，即同时加工限位套150和轴套120的内螺纹，以使连接处的螺纹不会错位。然后作为整体组件安装于驱动轴112上，即可保证安装顺畅，从而避免由于限位套150和轴套120连接位置的螺纹沿周向错位而导致与驱动轴112螺纹连接不顺畅的问题。
为了避免限位套150和轴套120插接时出现沿轴向错位，可选的，套筒151与导向部127配合的侧壁设置有第一卡接部155，相对应的，导向部127与套筒151配合的侧壁设置有第二卡接部129。当套筒151和导向部127插接配合时，第一卡接部155和第二卡接部129卡接，以起到防呆的作用。其中，第一卡接部155和第二卡接部129二者之中的其中一个为凸起，另外一个为凹槽。
具体的，请参照图8，弹性件140套设于限位套150和轴套120，限位套150和轴套120同时螺纹连接于驱动轴112上，且限位套150的内螺纹 和轴套120的内螺纹与驱动轴112的外螺纹螺纹连接，弹性件140的一端抵接于限位套150的限位部153，另一端抵接于轴套120的抵接部125。当驱动轴112转动时，限位套150和轴套120会同步沿驱动轴112的轴线运动，且限位部153和抵接部125之间的限位空间保持不变，弹性件140的压缩量保持不变，弹性件140受压产生的预紧力也保持不变。且弹性件140的预紧力分别将限位套150和轴套120推向两侧，以使轴套120的内螺纹远离限位套150的一侧始终与驱动轴112外螺纹的一侧面抵接，限位套150的内螺纹远离轴套120的一侧始终与驱动轴112外螺纹的另一侧面抵接，即轴套120的内螺纹和限位套150的内螺纹始终分别与驱动轴112上外螺纹背对的两侧抵接，从而改善了由于螺纹连接的配合间隙导致的回程误差问题。
本申请实施例提供的镜头支架驱动机构100，通过将轴套120与固定件130可拆卸连接，轴套120采用塑胶材质，固定件130采用金属材质。一方面改善了驱动轴112在传动时，采用塑胶材质的转接件出现大幅度变形而导致的精确度较差的问题，提高了驱动机构整体的结构强度，降低传动过程中受力扭动发生的变形。另一方面改善了采用金属材质的转接件与驱动轴112螺纹连接时，因为制造、安装误差导致的传动卡顿、不顺畅的问题。另外，通过设置弹性件140，可以改善驱动轴112与轴套120螺纹传动时由于螺纹配合间隙而导致的回程误差问题。有利于提高镜头组件位置调节的精确性、稳定性，可以快速、方便的将镜头组件投影画面移动至理想位置，从而提高调节效率。
本申请实施例还提供了一种镜头支架调节装置200，请参照图9和图10所示，该镜头支架调节装置200可以包括第一支架210、第二支架220、镜头卡架230以及上述镜头支架驱动机构100。
其中，第一支架210为放置于桌面或工作台上的固定支架；第二支架220沿第一方向201可滑动的连接于第一支架210，以使第二支架220相对于第一支架210可以沿第一方向201滑动；镜头卡架230沿第二方向203可滑动的连接于第二支架220，即镜头卡架230相对于第二支架220可以沿第二方向203滑动，镜头卡架230用于安装镜头组件，第二方向203与第 一方向201具有夹角。当第二支架220相对于第一支架210滑动时，第二支架220会带动镜头卡架230沿第一方向201同步运动，然后通过镜头卡架230相对于第二支架220沿第二方向203运动，实现了镜头卡架230在平面内的位置调节。
具体的，镜头支架驱动机构100数量为两个且分别为第一驱动机构240和第二驱动机构250。第一驱动机构240安装于第一支架210和第二支架220之间，用于驱动第二支架220相对于第一支架210沿第一方向201滑动。第二驱动机构250安装于第二支架220和镜头卡架230之间，用于驱动镜头卡架230相对于第二支架220沿第二方向203滑动。
可选地，第一方向201和第二方向203垂直，当第一方向201为X轴方向时，第二方向203为Y轴方向，以使两个驱动机构中的一个驱动镜头卡架230沿上下方向移动，另一个驱动镜头卡架230沿水平方向移动。
进一步地，第一支架210和第二支架220之间设置有第一导轨212，第一导轨212沿第一方向201延伸，第一驱动机构240驱动第二支架220可以沿第一导轨212滑动。第二支架220与镜头卡架230之间设置有第二导轨222，第二导轨222沿第二方向203延伸，第二驱动机构250驱动镜头卡架230可以沿第二导轨222滑动。通过第一导轨212和第二导轨222可以实现上下、左右两个位置的移动，方便调节镜头组件的位置。
请参照图9，第一驱动机构240中的驱动件110固定于第一支架210，第一驱动机构240中的固定件130固定于第二支架220。当第一驱动机构240中的驱动轴112转动时，轴套120通过固定件130带动第二支架220和镜头卡架230相对于第一支架210沿第一方向201滑动。
可选的，第一驱动机构240中的驱动件110通过电机座固定连接于第一支架210，采用螺栓将第一驱动机构240中的固定件130与第二支架220固定连接。
第二驱动机构250中的驱动件110固定于第二支架220，第二驱动机构250中的固定件130固定于镜头卡架230。当第二驱动机构250中的驱动轴112转动时，轴套120通过固定件130带动镜头卡架230相对于第二支架220沿第二方向203滑动。
可选的，第二驱动机构250中的驱动件110通过电机座固定连接于第二支架220，采用螺栓将第二驱动机构250中的固定件130与镜头卡架230固定连接。
由于镜头支架调节装置在对镜头组件进行位置调节时，需要通过驱动机构使镜头组件的投影画面按照预设位置调节至指定位置，且对指定位置的精确性具有一定的要求。发明人经过研究发现，影响位置调节精确度的显著因素包括驱动件(驱动电机)的精度、驱动机构传动精度、各零部件传动配合的紧密程度、各零部件结构本身的稳定性、螺纹间隙配合中存在的螺纹配合游隙等因素。另外，发明人在多次试验中发现：当与驱动轴112传动连接的转接件整体采用塑胶材质时，在调节过程中容易因为转接件受力而导致大幅度变形，进而影响位置调节的准确性。当与驱动轴112传动连接的转接件整体采用金属材质时，在传动过程中由于螺纹配合的精度原因而导致传动不顺畅、卡顿甚至无法运转的问题。
本申请实施例提供的镜头支架调节装置200，通过采用上述的镜头支架驱动机构100，金属材质的固定件130与塑胶材质的轴套120可拆卸连接，不仅可以改善螺纹传动时出现的卡顿现象，而且可以改善受力变形导致的位置调节准确性问题，且即使在传动过程中与驱动轴112传动连接的轴套120损坏后，只需要更换轴套120即可，减少更换的零件数，降低生产成本。另外，通过设置弹性件140，可以改善螺纹连接的螺纹配合游隙问题；通过限位套150、弹性件140以及轴套120配合，实现驱动轴112传动至任何位置时，弹性件140具有恒定的预紧力，有利于消除驱动轴112与轴套120之间螺纹游隙，避免运动空行程及回程误差，同时保证了驱动机构传动的平稳性。
本申请实施例还提供了一种投影机，包括镜头组件和上述镜头支架调节装置，镜头组件安装于镜头支架调节装置中的镜头卡架230上，通过驱动机构驱动镜头卡架230移动，以使镜头组件的投影图像可以快速的移动到理想位置，且可以提高镜头组件调节位置的准确性、顺畅性以及镜头组件运行时的稳定性。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对 其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不驱使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (10)

  1. 一种镜头支架驱动机构，其特征在于，包括：
    具有驱动轴的驱动件；
    轴套，所述轴套包括套本体，所述套本体套设于所述驱动轴且与所述驱动轴螺纹连接，所述套本体的外侧壁包括第一连接部；以及
    固定件，所述固定件包括固定本体和连接于所述固定本体的第二连接部，所述第二连接部与所述第一连接部可拆卸连接；
    所述驱动件用于固定在镜头固定支架上，所述固定件用于固定在镜头移动支架上，当所述驱动轴转动时，所述轴套沿所述驱动轴轴向移动，以使所述镜头移动支架相对于所述镜头固定支架沿所述驱动轴的轴向移动。
  2. 根据权利要求1所述的镜头支架驱动机构，其特征在于，所述固定件为金属材质，所述轴套为塑胶材质。
  3. 根据权利要求1所述的镜头支架驱动机构，其特征在于，所述套本体为圆环，所述第一连接部设置有外螺纹，所述第二连接部开设有与所述第一连接部相配合的螺纹孔，所述第二连接部套设于所述第一连接部且与所述第一连接部螺纹连接。
  4. 根据权利要求1所述的镜头支架驱动机构，其特征在于，还包括弹性件，所述弹性件套设于所述驱动轴，且所述弹性件靠近所述固定件的一端抵接于所述轴套或者所述固定件，以使所述轴套具有朝向所述驱动轴延伸方向的预紧力。
  5. 根据权利要求4所述的镜头支架驱动机构，其特征在于，所述轴套 还包括凸设于所述套本体外侧壁的抵接部，所述抵接部位于所述第一连接部的远离所述第二连接部的一侧；
    所述弹性件的一端抵接于所述驱动件，另一端抵接于所述抵接部。
  6. 根据权利要求4所述的镜头支架驱动机构，其特征在于，还包括限位套，所述限位套包括套筒和连接于所述套筒的限位部，所述套筒的内侧壁设置有与所述驱动轴配合的内螺纹；
    所述轴套还包括连接于所述套本体的抵接部和导向部，所述导向部位于所述套本体远离所述第一连接部的一端，所述抵接部位于所述第一连接部和所述导向部之间，且所述抵接部凸设于所述套本体的外侧壁和导向部的外侧壁；
    所述套筒与所述导向部插接，且能够相对于所述驱动轴同步转动，所述限位部与所述抵接部之间具有限位空间，所述弹性件套设于所述套筒和所述导向部，所述限位套和所述轴套依次套设于所述驱动轴且与所述驱动轴螺纹连接，所述弹性件的一端抵接于所述限位部，另一端抵接于所述抵接部。
  7. 根据权利要求6所述的镜头支架驱动机构，其特征在于，所述套筒与所述导向部配合的侧壁为非圆形结构，所述导向部与所述套筒配合的侧壁为与所述套筒侧壁相匹配的非圆形结构。
  8. 根据权利要求7所述的镜头支架驱动机构，其特征在于，所述套筒与所述导向部配合的侧壁设置有第一卡接部，所述导向部与所述套筒配合的侧壁设置有第二卡接部，所述第一卡接部和所述第二卡接部二者之中的其中一个为凸起，另外一个为凹槽；
    当所述套筒与所述导向部插接配合时，所述第一卡接部和所述第二卡接部卡接。
  9. 一种镜头支架调节装置，其特征在于，包括
    第一支架；
    第二支架，所述第二支架沿第一方向可滑动的连接于所述第一支架；
    镜头卡架，所述镜头卡架沿与所述第一方向具有夹角的第二方向可滑动的连接于所述第二支架；以及
    如权利要求1-8任一项所述的镜头支架驱动机构，所述镜头支架驱动机构数量为两个且分别为第一驱动机构和第二驱动机构；
    所述第一驱动机构中的驱动件固定于所述第一支架，所述第一驱动机构中的固定件固定于所述第二支架，所述第一驱动机构用于驱动所述第二支架和所述镜头卡架相对于所述第一支架沿所述第一方向滑动；
    所述第二驱动机构中的驱动件固定于所述第二支架，所述第二驱动机构中的固定件固定于所述镜头卡架，所述第二驱动机构用于驱动所述镜头卡架相对于所述第二支架沿所述第二方向滑动。
  10. 一种投影机，其特征在于，包括：
    镜头组件；以及
    如权利要求9所述的镜头支架调节装置，所述镜头组件安装于所述镜头卡架。
PCT/CN2021/106739 2020-07-21 2021-07-16 镜头支架驱动机构、调节装置以及投影机 Ceased WO2022017274A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202021467590.6 2020-07-21
CN202021467590.6U CN212623540U (zh) 2020-07-21 2020-07-21 镜头支架驱动机构、调节装置以及投影机

Publications (1)

Publication Number Publication Date
WO2022017274A1 true WO2022017274A1 (zh) 2022-01-27

Family

ID=74720205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/106739 Ceased WO2022017274A1 (zh) 2020-07-21 2021-07-16 镜头支架驱动机构、调节装置以及投影机

Country Status (2)

Country Link
CN (1) CN212623540U (zh)
WO (1) WO2022017274A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212623540U (zh) * 2020-07-21 2021-02-26 深圳光峰科技股份有限公司 镜头支架驱动机构、调节装置以及投影机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100033756A (ko) * 2008-09-22 2010-03-31 삼성전기주식회사 렌즈 모듈
CN108072955A (zh) * 2016-11-15 2018-05-25 深圳市光峰光电技术有限公司 镜头调整模组及投影设备
CN108073019A (zh) * 2016-11-15 2018-05-25 深圳市光峰光电技术有限公司 镜头微调装置、镜头调整模组及投影设备
CN111240135A (zh) * 2020-04-10 2020-06-05 中航国画（上海）激光显示科技有限公司 投影仪镜头位移调整机构、调整方法及投影仪
CN210924164U (zh) * 2019-09-30 2020-07-03 深圳光峰科技股份有限公司 镜头调节装置及投影设备
CN212623540U (zh) * 2020-07-21 2021-02-26 深圳光峰科技股份有限公司 镜头支架驱动机构、调节装置以及投影机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100033756A (ko) * 2008-09-22 2010-03-31 삼성전기주식회사 렌즈 모듈
CN108072955A (zh) * 2016-11-15 2018-05-25 深圳市光峰光电技术有限公司 镜头调整模组及投影设备
CN108073019A (zh) * 2016-11-15 2018-05-25 深圳市光峰光电技术有限公司 镜头微调装置、镜头调整模组及投影设备
CN210924164U (zh) * 2019-09-30 2020-07-03 深圳光峰科技股份有限公司 镜头调节装置及投影设备
CN111240135A (zh) * 2020-04-10 2020-06-05 中航国画（上海）激光显示科技有限公司 投影仪镜头位移调整机构、调整方法及投影仪
CN212623540U (zh) * 2020-07-21 2021-02-26 深圳光峰科技股份有限公司 镜头支架驱动机构、调节装置以及投影机

Also Published As

Publication number Publication date
CN212623540U (zh) 2021-02-26

Similar Documents

Publication Publication Date Title
WO2022017274A1 (zh) 镜头支架驱动机构、调节装置以及投影机
CN212470484U (zh) 螺丝锁付装置及螺丝装配机器人
CN109185410B (zh) 高精度推杆
CN110369986A (zh) 一种用于微小螺纹副自动装配装置
EP4647373A1 (en) Material transfer apparatus
CN113181983B (zh) 一种定量加液装置及系统
CN111594591B (zh) 自适应丝杠螺母驱动装置
CN113017242B (zh) 一种移动桌面的驱动结构及桌子
CN216851608U (zh) 带双头轴承限位的电机转子轴
CN222540597U (zh) 一种mbr帘式膜排丝装置
CN224025480U (zh) 一种涂覆机用点胶机构
CN223981739U (zh) 一种无油涡旋真空泵的装配用定位组件
CN224042419U (zh) 一种连接杆组装旋铆装置用连接杆上料机构
CN222016785U (zh) 一种组装治具
CN215200860U (zh) 一种便于调节以消除蜗杆窜动的换刀系统蜗杆装配结构
CN211852552U (zh) 一种离合器基板固定件
CN209305254U (zh) 一种导向机构及轮胎安装设备
CN220780996U (zh) 一种点胶装置及固晶设备
CN222434065U (zh) 一种伸缩臂叉车及其可调管线张紧装置
CN224114433U (zh) 超小型产品点胶辅助工装
CN223184883U (zh) 一种多球囊夹具及批量药物球囊涂药设备
CN218670252U (zh) 一种可调节的轴承水平调心装置
CN221374279U (zh) 一种变速器转接盘
CN111895055A (zh) 一种云台摄像机的同步带松紧调节结构
CN224147172U (zh) 一种用于悬式盘形瓷绝缘子坯件的周转机械臂

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21845850

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21845850

Country of ref document: EP

Kind code of ref document: A1