WO2024061214A1 - 压电驱动式快门、镜头模组及照相设备 - Google Patents

压电驱动式快门、镜头模组及照相设备 Download PDF

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Publication number
WO2024061214A1
WO2024061214A1 PCT/CN2023/119723 CN2023119723W WO2024061214A1 WO 2024061214 A1 WO2024061214 A1 WO 2024061214A1 CN 2023119723 W CN2023119723 W CN 2023119723W WO 2024061214 A1 WO2024061214 A1 WO 2024061214A1
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WO
WIPO (PCT)
Prior art keywords
base
block
movable block
movable
piezoelectric
Prior art date
Application number
PCT/CN2023/119723
Other languages
English (en)
French (fr)
Inventor
汪仁德
李鸿涛
彭坤
林聪�
刘富泉
吕新科
Original Assignee
河南皓泽电子股份有限公司
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Filing date
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Application filed by 河南皓泽电子股份有限公司 filed Critical 河南皓泽电子股份有限公司
Publication of WO2024061214A1 publication Critical patent/WO2024061214A1/zh

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Classifications

    • 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • 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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter
    • 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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter
    • G03B9/62—Means for varying duration of "open" period of shutter by varying interval of time between end of opening movement and beginning of closing movement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/04—Constructional details

Definitions

  • the present invention relates to the field of cameras, and specifically to a piezoelectric driven shutter, a lens module and a photographic device.
  • the shutter is usually set on the outside of the lens, and the lens is blocked by movement.
  • the shutter When the shutter is pressed, the shutter opens, allowing light to enter the lens; after the photo is taken, the shutter closes, blocking the lens so that light cannot enter the lens.
  • Shutters are divided into mechanical shutters and electronic shutters.
  • Mechanical shutters are divided into two categories: purely mechanical drive and mechanical electromagnetic drive.
  • the existing mechanical electromagnetic driven shutter has a relatively complex structure and a relatively large volume, which is not conducive to the miniaturization of the camera.
  • the object of the present invention is to provide a piezoelectric driven shutter and lens module.
  • a piezoelectric driven shutter wherein the piezoelectric driven shutter includes a housing, a piezoelectric driving mechanism and a movable baffle installed in the housing, and the housing There is a first light inlet and a lens mounting part, the lens mounting part is used to install the lens, the movable baffle has a second light inlet, the piezoelectric driving mechanism is drivingly connected to the movable baffle to The movable baffle is driven to switch between the light-shielding position and the light-entry position, wherein, in the light-shielding position, the movable baffle blocks the first light-inlet hole, and in the light-entrance position, the The first light entrance hole is aligned with the second light entrance hole.
  • the piezoelectric driving mechanism includes a counterweight block, a piezoelectric deformation block and a connecting piece that are fixedly connected together in sequence.
  • the connecting piece is drivingly connected to the movable baffle, and the piezoelectric deforming piece The block deforms when energized to drive the connecting piece to move linearly.
  • the piezoelectric driven shutter further includes a movable block, the movable block is installed in the housing, the movable baffle is fixed on the movable block, and the connecting piece is connected to the movable block.
  • the above movable blocks are fixedly connected.
  • the connecting member is a carbon rod.
  • the connecting piece is fixed to the movable block through an elastic clamping component.
  • the elastic clamping assembly includes a clamping plate and a spring, the clamping plate and the spring are fixed on the movable block, and the connecting piece is clamped on the clamping plate and the spring. between films.
  • the splint is a bent plate with a "V" shape in cross section, and the spring has a hollow structure.
  • the movable block has a carbon rod mounting groove and a splint mounting groove.
  • the carbon rod mounting groove is provided on the top surface of the movable block and extends along the length direction of the movable block.
  • the connection The parts are fixedly installed in the carbon rod mounting groove, the splint mounting groove is provided on both sides of the width direction of the top surface of the movable block, and plywood protrusions are provided on both sides of the width direction of the plywood. The protrusions are clamped in the plywood mounting groove.
  • the movable block is provided with reed connecting posts on both sides of the plywood mounting groove along the length direction. The reeds are provided with connecting holes, and the connecting holes are sleeved.
  • both ends of the movable block are provided with end walls extending perpendicularly to the length direction of the movable block from the top surface of the movable block, and a through-guide guide is provided in the end wall.
  • the guide holes are coaxial with each other and communicate with the carbon rod mounting groove, and the connecting piece passes through the guide holes.
  • both ends of the movable block in the length direction are respectively provided with a mounting platform and a load-bearing platform extending outward from the top, and a first baffle is installed on the installation platform and the load-bearing platform respectively.
  • the first baffle mounting slot is provided with a mounting protrusion for engaging with the mounting slot on the movable baffle.
  • the first baffle mounting slot is A dotted glue slot is provided in both the second baffle installation groove and the second baffle installation groove for bonding the movable block and the movable baffle.
  • the housing includes a first base, a second base and a cover, the lens mounting part is formed between the first base and the second base, the movable block and the The piezoelectric driving mechanism is installed in the first base, and the cover is provided with the first light entrance hole.
  • a movable block installation groove is provided in the middle of the first base, and the movable block is movably installed in the movable block installation groove along the length direction.
  • the movable block installation groove extends along the length direction.
  • the first base is also provided with a load-bearing platform avoidance groove, and the load-bearing platform avoidance groove is located at the top of the U-shaped support groove.
  • the first base is also provided with a counterweight block installation groove and a deformation block installation groove, and the deformation block installation groove and the movable block installation groove are respectively located on both sides of the U-shaped support frame.
  • the counterweight block and the piezoelectric deformation block are suspended and installed in the counterweight block installation groove and the deformation block installation groove respectively.
  • the counterweight block installation groove is provided with a first glue dispensing groove, and the first glue dispensing groove is used to dispense glue and adhere the first base to the side wall of the counterweight block. catch.
  • the first base is provided with a built-in circuit, one end of the built-in circuit is located on the outer end surface of the base, forming a first power point for connection with an external circuit, and the other end of the built-in circuit Located on both sides of the mounting groove of the deformation block, a second energizing point is formed for connecting to the connecting wire on the deformation block.
  • the mutually facing surfaces of the first base and the second base form an arc notch, and the arc notch is used to avoid the lens.
  • limiting protrusions are provided on both sides of the top ends of the first base and the second base, and the first limiting protrusions are used to limit the position of the movable baffle.
  • the first limiting protrusion is provided with a second limiting protrusion, and corresponding limiting notches are provided on both sides of the cover to accommodate the second limiting protrusion.
  • the second limiting protrusion is used to limit the cover.
  • the piezoelectric driven shutter has a compact structure and small occupied volume, which is conducive to the miniaturization of the lens module, low cost, and is easy to assemble and control.
  • a lens module is also provided.
  • the lens module includes a lens and a shutter.
  • the shutter includes a piezoelectric driven shutter as described above.
  • a photographic device is also provided, wherein the photographic device includes the lens module as described above.
  • Figure 1 is a perspective view of a lens module according to an embodiment of the present invention.
  • FIG 2 is another perspective view of the lens module shown in Figure 1, in which the cover and lens are removed;
  • Figure 3 is an exploded view of the lens module shown in Figure 1;
  • Figure 4 is a perspective view of the cover of the lens module shown in Figure 1;
  • Figure 5 is a perspective view of the first base of the lens module shown in Figure 1;
  • Figure 6 is a perspective view of the second base of the lens module shown in Figure 1;
  • Figure 7 is a perspective view of the piezoelectric driving mechanism of the lens module shown in Figure 1;
  • Figure 8 is an exploded view of the movable mechanism of the lens module shown in Figure 1;
  • Figure 9 is a perspective view of the clamping assembly of the movable mechanism shown in Figure 8.
  • FIG. 10 is a perspective view of the movable block of the movable mechanism shown in FIG. 8 .
  • horizontal does not imply a requirement that the component be absolutely horizontal or overhanging, but may be slightly tilted.
  • “horizontal” only means that its direction is more horizontal than “vertical”. It does not mean that the structure must be completely horizontal, but can be slightly tilted.
  • the terms "setting”, “installation”, “connecting” and “connecting” should be understood in a broad sense.
  • it can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • the specific meanings of the above terms in this application can be understood on a case-by-case basis.
  • the lens module according to an embodiment of the present invention may include a piezoelectrically driven shutter and a lens 100.
  • the lens 100 includes a lens mounting seat.
  • the piezoelectrically driven shutter may include a housing 1, a piezoelectric driving mechanism 2 and a movable mechanism 3 installed in the housing 1.
  • the housing 1 is provided with a first light inlet hole 111 and a lens mounting portion 14, and the lens 100 is installed in the lens mounting portion 14 and aligned with the first light inlet hole 111.
  • the movable mechanism 3 includes a movable baffle 31, and the movable baffle 31 has a second light inlet hole 311.
  • the piezoelectric drive mechanism 2 is connected to the movable baffle 31 to drive the movable baffle 31 to switch between the light shielding position and the light admission position; wherein, in the light shielding position, the movable baffle 31 shields the first light admission hole 111 (or the lens 100), and in the light admission position, the first light admission hole 111 is aligned with the second light admission hole 311.
  • the piezoelectric drive mechanism 2 drives the movable baffle 31 to move from the light shielding position to the light admission position, that is, the shutter is opened, and light enters from the first light admission hole 111 (or the lens 100).
  • a light inlet 111 and a second light inlet 311 enter the lens 100; after the photo is taken, the piezoelectric drive mechanism 2 drives the movable baffle 31 to move from the light-inlet position to the light-shielding position, that is, the shutter is closed, and the movable baffle 31 blocks the lens 100, so that light cannot enter the lens 100.
  • the shutter opening time can be easily adjusted to meet the needs of professional photography.
  • the piezoelectric driven shutter has a compact structure and occupies a small volume, which is conducive to the miniaturization of the lens module, low cost, and easy assembly and control.
  • the housing 1 may include a cover 11 , a first base 12 and a second base 13 .
  • the cover 11 is generally in the shape of a rectangular parallelepiped shell, as shown in Figure 3, with its bottom and one end (the left end in Figure 3 is open).
  • the top of the cover 11 is provided with a first light inlet 111, a first base 12 and a second
  • the bases 13 are located in the cover body 11 and are spaced apart from each other, with a lens mounting portion 14 formed therebetween.
  • the cover 11 is fixedly connected to the first base 12 and the second base 13 (for example, by clamping or glue bonding) to form a hollow cavity, and the piezoelectric driving mechanism 2 and the movable mechanism 3 are arranged in the hollow cavity. Specifically, it is located between the first base 12 and the top plate of the cover 11 .
  • the cover 11 includes a top plate 112 , front and rear side plates 113 and a right side plate 114 .
  • the first light entrance hole 111 is opened on the top plate 112 .
  • the front and rear side plates 113 have a notch at the lens mounting portion 14 to avoid the lens 100 .
  • the first light entrance hole 111 is rectangular.
  • the top plate 112 is also provided with limiting notches 115 on both sides that cooperate with the second limiting protrusions 122 and 132 on the first base 12 and the second base 13 .
  • the limiting notch 115 is U-shaped.
  • the right side panel 114 is spaced apart from the front and rear side panels 113 to allow for the limiting ribs 133 provided on both sides of the right end of the second base 13 .
  • the right side plate 114 is in close contact with the right end surface of the second base 13 .
  • the cover 11 is not limited to the above shape, as long as it can be fixedly connected to the first base 12 and the second base 13 and form a space for accommodating the piezoelectric driving mechanism 2 and the movable mechanism 3 .
  • the cover 11 may omit the front side panel or the rear side panel.
  • the first base 12 and the second base 13 are respectively disposed on both sides of the lens 100 , and their opposite surfaces form an arcuate gap for placing the lens 100 .
  • First limiting protrusions 121 and 131 extending along the length direction are provided on both sides of the top of the right end of the first base 12 and the top of the left end of the second base, which are used to limit the movable baffle 31 .
  • the height of the first limiting protrusions 121 and 131 is greater than the thickness of the movable baffle 31 and can support the bottom surface of the cover 11 to prevent the bottom surface of the cover 11 from squeezing the movable baffle 31 .
  • the second limiting protrusions 122 and 132 are provided on the top surfaces of the first limiting protrusions 121 and 131 , and are used to cooperate with the limiting notch 115 to limit the cover 11 .
  • the second limiting protrusions 122 and 132 The size and shape are roughly the same as the limiting notches 115 on the cover 11; and the heights of the second limiting protrusions 122 and 132 are basically the same as the thickness of the top plate 112, so that when the cover 11 is connected with the first base 12 and the second base When 13 are fixed together, the second limiting protrusions 122 and 132 are flush with the upper surface of the cover 11, making the appearance of the entire housing 1 neat.
  • the outer bottom ends of the first base 12 and the second base 13 are both provided with glue dispensing grooves 120 and 130.
  • the glue dispensing grooves 120 and 130 are connected to each other. 130 for dispensing glue to realize the bonding between the cover 11 and the base (the first base 12 and the second base 13).
  • other types of limiting structures can also be formed between the first base 12 and the cover 11 to position the cover 11 relative to the first base 12, and are not limited to the above-mentioned second limiting protrusions 122 and 132 and Limiting notch 115.
  • depressions may also be formed on the top surfaces of the first limiting protrusions 121 and 131
  • corresponding protrusions may be formed on the bottom surface of the cover 11 .
  • the first base 12 is a structure with a lower middle and higher sides along the length direction, and includes a bottom plate and two end portions extending upward at both ends of the bottom plate in the length direction.
  • the middle part of the first base 12, that is, the bottom plate is provided with a movable block installation groove 123 extending along the length direction, which is used to install the movable block 32.
  • the movable block 32 can move along the length direction in the movable block installation groove 123.
  • Two The ends are located at both ends of the movable block installation groove 123 respectively.
  • the first base 12 is provided with a U-shaped support frame 124, a deformation block installation groove 125 and a counterweight block installation groove 126 in sequence along the length direction on the left side of the movable block installation groove 123.
  • the U-shaped support frame 124 is arranged substantially perpendicular to the length direction. Two arms of the U-shaped support frame 124 extend upward from the bottom plate, and a receiving area is formed between the two arms.
  • the deformation block installation groove 125 and the counterweight block installation groove 126 are formed in the left end portion and are both open upward and penetrate each other along the length direction.
  • the first base 12 is provided with a U-shaped support groove 127 on the right side of the movable block installation groove 123.
  • the U-shaped support groove 127 is recessed from the right end to the end surface of the movable block installation groove 123, and its cross-sectional direction is U-shaped.
  • the right side of the U-shaped support groove 127 is preferably provided with a hollow hole 128 .
  • the U-shaped support frame 124 and the U-shaped support groove 127 are located at both ends of the movable block installation groove 123, and are used to support and limit the friction rod 23 to prevent the friction rod 23 from deflecting during movement.
  • the groove widths of the U-shaped support frame 124 and the U-shaped support groove 127 are substantially the same as the diameter of the friction rod 23 .
  • the deformation block installation slot 125 and the counterweight block installation slot 126 are used to install the piezoelectric deformation block 22 and the counterweight block 21 respectively.
  • the hollow hole 128 is used to avoid the friction rod 23.
  • the diameter of the hollow hole 128 is substantially the same as the diameter of the friction rod 23 .
  • the first glue dispensing groove 1212 is provided on the left side of the counterweight block installation groove 126, and is used for dispensing glue and bonding the first base 12 and the side wall of the counterweight block 21.
  • the first dispensing groove 1212 is preferably provided with a connecting protrusion 1213 in order to increase the connection between the first base 12 and the matching
  • the bonding area of the side wall of the weight block 21 improves the bonding stability.
  • the first base 12 is provided with a load-bearing platform avoidance groove 129 above the U-shaped support groove 127.
  • the load-bearing platform avoidance groove 129 is formed by being recessed downward from the top surface of the right end portion, and its width is greater than the width of the U-shaped support groove 127, so that support shoulders are formed on both sides of the bottom surface of the load-bearing platform avoidance groove 129.
  • the second base 13 is generally L-shaped, and is generally mirror symmetrical to the right end portion of the first base 12 .
  • the top right end of the second base 13 has a stop protrusion 134 extending along the width direction.
  • the stop protrusion 134 is used to limit the movement range of the movable baffle 31 along the length direction, and on the other hand, it is used to support the cover.
  • the cover 11 , the first base 12 and the second base 13 can all be made by extrusion molding or injection molding to achieve mass production and reduce costs.
  • buffer blocks 1214 are provided on the walls at both ends of the movable block installation slot 123 of the first base 12.
  • the buffer blocks 1214 are used to cooperate with the corresponding buffer blocks 327 at both ends of the movable block 32. Vibration and damage caused by hard collision between the movable block 32 and the first base 12 are avoided, thereby improving the service life.
  • a built-in circuit is provided on the left side of the first base 12.
  • One end of the built-in circuit is located on the left end surface of the first base 12, forming a first power point 1210 for communicating with an external circuit. (for example, a camera control unit); the other end of the built-in circuit is located on both sides of the deformation block installation slot 125 to form a second power point 1211 for connecting to the connecting wire 221 on the piezoelectric deformation block 22 .
  • the built-in circuit is usually injection molded into the first base 12 when the first base 12 is formed.
  • the first base 12 is provided with a built-in circuit positioning protrusion, which protrudes from the bottom surface of the first glue groove 1212 for positioning the built-in circuit during injection molding. To operate, apply glue in the first glue slot 1212 and cover it.
  • the piezoelectric driving mechanism 2 utilizes the reverse piezoelectric effect of the piezoelectric material to obtain driving force, and its structure can be designed as needed.
  • the piezoelectric driving mechanism 2 may include a weight block 21 , a piezoelectric deformation block 22 and a connecting piece 23 that are sequentially connected together along the length direction.
  • the counterweight block 21 and the piezoelectric deformation block 22 are in the shape of a rectangular parallelepiped
  • the connecting member 23 is in the shape of a round rod. Therefore, in this article, the connecting piece 23 is also called friction bar 23 .
  • the friction rod 23 is a carbon rod, so that the friction rod 23 has Greater friction.
  • the counterweight block 21 and the piezoelectric deformation block 22 are respectively installed in the counterweight block installation slot 126 and the deformation block installation slot 125 of the first base 12 .
  • the piezoelectric deformation block 22 is suspended in the deformation block installation groove 125, and the counterweight block 21 is also suspended in the counterweight block installation groove 126. That is to say, in the piezoelectric driving mechanism 2 , only the bottom surface of the friction rod 23 is in contact with the U-shaped support frame 124 and the U-shaped support groove 127 of the first base 12 to play a supporting role. That is, both the weight block 21 and the piezoelectric deformation block 22 are supported by the supporting force of the friction rod 23 .
  • the deformation block installation groove 125 and the counterweight block installation groove 126 of the first base 12 will also limit the outer sides of the piezoelectric deformation block 22 and the counterweight block 21 in the width direction, but will not support the bottom thereof.
  • the left end wall of the counterweight block 21 is fixedly connected to the first base 12 by applying glue into the first glue groove 1212 .
  • Connection wires 221 are provided on both sides of the piezoelectric deformation block 22 and are connected to the second energization point on the first base 12 through the connection wires 221 . After the piezoelectric deformation block 22 is energized and deformed, it drives the friction rod 23 to move, thereby driving the movable mechanism 3 to move, thereby realizing the opening and blocking operations of the lens 100 .
  • the movable mechanism 3 may include a movable baffle 31, a movable block 32, a clamping plate 33 and a spring 34.
  • the movable baffle 31 is a long plate-like structure, including a first baffle part (also called a left part) 31a and a second baffle part (also called a right part) 31b, where the first baffle part 31a is fixed on On the movable block 32, the second baffle portion 31b extends out of the movable block 32.
  • the movable baffle 31 has a variable diameter structure.
  • the first baffle portion 31a of the movable baffle 31 has a smaller width and cooperates with the baffle installation groove on the movable block 32 to achieve position limiting; while the second baffle portion 32b of the movable baffle 31 has a larger width. , which cooperates with the first limiting protrusions 121 and 131 on the tops of the first base 12 and the second base 13 to achieve positioning, so as to move along the length direction between the two.
  • the left end of the movable baffle 31 is provided with a mounting slot 312 for receiving the mounting protrusion 3213 on the movable block 32 .
  • a second light inlet 311 is provided on the right portion 31b of the movable baffle 31 .
  • the second light entrance hole 311 When light needs to enter, the second light entrance hole 311 is located above the lens 100 and corresponds to the first light entrance hole 111 provided on the cover 11; after the photography is completed, the second light entrance hole 311 is moved through the movement of the movable baffle 31.
  • the light entrance hole 311 is offset from the lens to realize the blocking operation of the lens 100 .
  • the movable block 32 is a structure with a concave middle and high ends along the length direction. As shown in FIG. 10 , it includes two end walls located at both ends of the movable block 32 and extending upward perpendicularly to the length direction. Mounting platforms 321 and load-bearing platforms 322 are respectively provided at the tops of both ends of the movable block 32 in the length direction (or movement direction). The top surfaces of the installation platform 321 and the load-bearing platform 322 are both provided with baffle installation grooves (ie, the first baffle installation groove 3211 and the second baffle installation groove 3221), which are used to install and limit the movable baffle 31.
  • baffle installation grooves ie, the first baffle installation groove 3211 and the second baffle installation groove 3221
  • Second dispensing slots 3212 and 3222 are provided in the second baffle installation slot 3221 for bonding the movable block 32 and the movable baffle 31 together.
  • the depths of the second dispensing slots 3212 and 3222 are generally less than 0.5 mm.
  • the bottom surface of the baffle installation groove (ie, the first baffle installation groove 3211 ) of the installation platform 321 is provided with a mounting protrusion 3213 for engaging with the installation slot 312 on the movable baffle 31 .
  • the installation platform 321 and the load-bearing platform 322 extend outward from the tops of the end walls at both ends of the movable block 32, which can increase the support area between the movable block 32 and the movable baffle 31, making the connection structure between the two more stable.
  • the movable block 32 is provided with a carbon rod mounting groove 323 extending in the length direction and a guide hole 324 penetrating the two end walls, and the carbon rod mounting groove 323 is connected to the guide hole 324.
  • the carbon rod mounting groove 323 and the guide hole 324 are both used to install the friction rod 23 of the piezoelectric drive mechanism 2.
  • the movable block 32 is provided with a clamping plate mounting groove 325 on both sides of the top surface width direction, that is, the clamping plate mounting groove 325 is arranged on both sides of the carbon rod mounting groove 323 and is orthogonally connected to the carbon rod mounting groove 323.
  • the bottom of both sides of the clamping plate mounting groove 325 has a two-step structure.
  • the clamping plate mounting groove 325 is formed by forming a rectangular recessed area by recessing downward on the top surface of the movable block 32 on both sides of the clamping plate mounting groove 325, and then forming another rectangular recess with a shorter length and an outward offset of the side length close to the clamping plate mounting groove at the bottom of the rectangular recessed area, thereby forming two steps at both ends of the clamping plate mounting groove 325 in the length direction to facilitate the installation of the clamping plate 33.
  • the movable block 32 is provided with spring connecting posts 326 on both sides of the clamping plate installation groove 325 along the length direction for installing the spring 34.
  • the upper part of the spring connecting post 326 is in a truncated cone shape to facilitate the installation of the spring 34.
  • connection method between the clamping plate 33 and the movable block 32 and the connection method between the spring 34 and the movable block 32 are not limited to the above specific methods, as long as they can be connected to each other.
  • positioning notches 328 are provided on both sides of the bottom of the movable block 32 to facilitate positioning during production and reduce weight.
  • the movable block 32 is usually made of plastic, and can be integrally formed, for example, by using an extrusion molding process or an injection molding process.
  • the clamping plate 33 is a bent plate with a "V"-shaped cross section to clamp the friction rod 23 in the middle.
  • the angle between the two halves of the clamping plate 33 is usually between 80 and 110 degrees and the angle is rounded.
  • Each half of the clamping plate 33 includes three rectangular parts that are symmetrically shortened from the inside to the outside, so that three-step structures are formed on both sides. The angles between the parts are rounded to avoid easy breakage due to stress concentration, which in turn affects the service life.
  • the clamping plate 33 can be made of elastic material. Among them, the outermost The side portion is called a clamping plate protrusion 331. During installation, the clamping plate protrusion 331 is clamped in the clamping plate installation groove 325 of the movable block 32, and the rest of the clamping plate 33 is located in the carbon rod installation groove 323 of the movable block 32.
  • the spring leaf 34 includes a clamping portion 341 located in the middle of the width and extending along the length direction, and four connecting portions 342 extending from the clamping portion 341 to both sides.
  • the end of each connecting part 342 has a reed connection hole 343 , and the reed connection hole 343 is used to cooperate with the reed connection post 326 of the movable block 32 to fix the reed 34 on the movable block 32 .
  • the reed connecting hole 343 and the reed connecting post 326 adopt an interference fit to avoid falling off.
  • the connecting part 342 has a hollow structure to reduce its weight.
  • each connecting portion 342 includes a multi-fold curved rib 3421 and a connecting piece 3422, wherein one end of the multi-folded curved rib 3421 is connected to the clamping portion 341 and the other end is connected to the connecting piece 3422.
  • the multi-bend curved rib 3421 is bent 10 times so that its two ends are staggered by a certain distance in the length direction and width direction of the reed 34, so that the connecting pieces 3422 are located at the four corners of the reed 34.
  • the reed 34 may be integrally made of elastic metal or non-metal material.
  • the friction rod 23 is located between the reed 34 and the clamping plate 33 , and the friction rod 23 and the movable block 32 are fixedly connected by the elastic force of the reed 34 and the clamping plate 33 . Therefore, the friction rod 23 can drive the movable block 32 to move.
  • the spring 34 is not limited to the above structure, as long as it is elastic and can be fixed to the movable block 32 on both sides and cooperates with the clamping plate 33 to clamp the friction rod 23 therebetween.
  • the friction rod 23 is fixed with the movable block 32 through the clamping plate 33 and the spring 34. It should be understood that the friction rod 23 can also be fixed with the movable block 32 in other ways (for example, snapping, threaded connection or screw fixing, etc.).
  • the piezoelectric driving mechanism 2 is fixedly installed with the movable block 32 through the clamping plate 33 and the reed 34; then they are installed together in the first base 12 and glue is poured into the first glue slot 1212 to make the assembly
  • the weight block 21 is fixedly connected to the first base 12; then glue is poured into the second glue slots 3212 and 3222 and the movable baffle 31 is fixedly installed on the movable block 32; then the connecting wire 221 of the piezoelectric deformation block 22 is connected to the first base 12.
  • the second energizing points on the first base 12 are welded together; then the cover 11 is placed on the first base 12 and the second base 13 and glue is poured into the corresponding dispensing slots to make the cover 11 and the first base 12 and The second base 13 forms a whole; finally, the lens 100 is installed on the lens mounting part 14 .
  • the entire installation process is very simple and convenient, and basically no additional tools are required.
  • a photographic device is also provided.
  • the photographic device includes Includes lens module as above.
  • Photographic equipment can be cameras, mobile phones with camera functions, tablet computers, surveillance cameras, etc.

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  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)

Abstract

本发明涉及一种压电驱动式快门、镜头模组和照相设备，其中，所述压电驱动式快门包括壳体及安装在所述壳体内的压电驱动机构和活动挡板，所述壳体设有第一进光孔和镜头安装部，所述镜头安装部用于安装镜头，所述活动挡板具有第二进光孔，所述压电驱动机构与所述活动挡板驱动连接，以带动所述活动挡板在遮光位置和进光位置之间切换，其中，在所述遮光位置，所述活动挡板遮住所述第一进光孔，而在所述进光位置，所述第一进光孔与所述第二进光孔对准。本压电驱动式快门结构紧凑，占用体积小，有利于镜头模组小型化，成本低，并且组装和控制方便。

Description

压电驱动式快门、镜头模组及照相设备
相关申请交叉引用
本专利申请要求于2022年9月20日提交的、申请号为202211148015.3、发明名称为“压电驱动式快门、镜头模组及照相设备”的中国专利申请的优先权，其全部内容以引用的方式纳入本文。
技术领域
本发明涉及相机领域，具体地涉及一种压电驱动式快门、镜头模组及照相设备。
背景技术
快门通常设置在镜头外侧，通过动作来实现对镜头的遮挡操作，按下快门时，快门打开，令光进入到镜头内；照相完成后，快门关闭，对镜头进行遮挡，光无法进入镜头内。
快门分为机械式快门和电子快门。机械式快门又分为纯机械驱动和机械电磁驱动两大类。现有机械电磁驱动的快门结构相对比较复杂，体积相对较大，不利于相机的小型化。
发明内容
本发明的目的是提供一种压电驱动式快门及镜头模组。
为实现上述目的，本发明采用的技术方案如下：
根据本发明的一方面，提供了一种压电驱动式快门，其中，所述压电驱动式快门包括壳体及安装在所述壳体内的压电驱动机构和活动挡板，所述壳体设有第一进光孔和镜头安装部，所述镜头安装部用于安装镜头，所述活动挡板具有第二进光孔，所述压电驱动机构与所述活动挡板驱动连接，以带动所述活动挡板在遮光位置和进光位置之间切换，其中，在所述遮光位置，所述活动挡板遮住所述第一进光孔，而在所述进光位置，所述第一进光孔与所述第二进光孔对准。
在较佳实施例中，所述压电驱动机构包括依次固定连接在一起的配重块、压电变形块和连接件，所述连接件与所述活动挡板驱动连接，所述压电变形块在通电情况下变形以带动所述连接件直线运动。
在较佳实施例中，所述压电驱动式快门还包括活动块，所述活动块安装在所述壳体内，所述活动挡板固定在所述活动块上，并且所述连接件与所述活动块固定连接。
在较佳实施例中，所述连接件为碳棒。
在较佳实施例中，所述连接件通过弹性夹持组件固定于所述活动块。
在较佳实施例中，所述弹性夹持组件包括夹板和簧片，所述夹板和所述簧片固定在所述活动块上，所述连接件被夹持在所述夹板和所述簧片之间。
在较佳实施例中，所述夹板为横截面呈“V”字形的弯折板，并且所述簧片具有镂空结构。
在较佳实施例中，所述活动块具有碳棒安装槽和夹板安装槽，所述碳棒安装槽设置在所述活动块的顶面并沿所述活动块的长度方向延伸，所述连接件固定安装在所述碳棒安装槽中，所述夹板安装槽设置在所述活动块顶面的宽度方向的两侧上，所述夹板的宽度方向两侧设置有夹板凸起，所述夹板凸起卡接在所述夹板安装槽内，所述活动块在所述夹板安装槽沿长度方向的两侧设有簧片连接柱，所述簧片上设有连接孔，所述连接孔套接在所述簧片连接柱上，所述活动块的两端设有从所述活动块的顶面垂直于所述活动块的长度方向延伸的端壁，所述端壁内设有贯通的导向孔，所述导向孔彼此同轴并与所述碳棒安装槽连通，且所述连接件穿过所述导向孔。
在较佳实施例中，所述活动块的长度方向的两端分别设置有从顶部向外延伸的安装平台和承重平台，所述安装平台和所述承重平台上分别设置有第一挡板安装槽和第二挡板安装槽，其中，所述第一挡板安装槽内设置有安装凸起，用于与所述活动挡板上的安装卡槽卡合，所述第一挡板安装槽和所述第二挡板安装槽内均设置有点胶槽，用于所述活动块与所述活动挡板的粘接。
在较佳实施例中，所述壳体包括第一底座、第二底座和盖体，所述第一底座和所述第二底座之间形成所述镜头安装部，所述活动块和所述压电驱动机构安装在所述第一底座内，所述盖体设置有所述第一进光孔。
在较佳实施例中，所述第一底座的中部设有活动块安装槽，所述活动块可沿长度方向运动地安装在所述活动块安装槽中，所述活动块安装槽沿长度方向的两侧分别设有U形支撑架和U形支撑槽，所述连接件由所述U形支撑架和所述U形支撑槽支撑限位。
在较佳实施例中，所述第一底座还设有承重平台避让槽，所述承重平台避让槽位于所述U形支撑槽的顶端。
在较佳实施例中，所述第一底座还设有配重块安装槽和变形块安装槽，所述变形块安装槽与所述活动块安装槽分别位于所述U形支撑架两侧，所述配重块和所述压电变形块分别悬空安装在所述配重块安装槽和所述变形块安装槽中。
在较佳实施例中，所述配重块安装槽设有第一点胶槽，所述第一点胶槽用于点胶并将所述第一底座与所述配重块的侧壁粘接。
在较佳实施例中，所述第一底座设有内置线路，所述内置线路的一端位于底座外侧端面上，形成第一通电点，用于与外部电路连接，并且所述内置线路的另一端位于所述变形块安装槽的两侧，形成第二通电点，用于与所述变形块上的连接线相连接。
在较佳实施例中，所述第一底座和所述第二底座的彼此相对面形成圆弧缺口，所述圆弧缺口用于避让镜头。
在较佳实施例中，所述第一底座和所述第二底座的顶端两侧设有限位凸起，所述第一限位凸起用于对所述活动挡板进行限位。
在较佳实施例中，所述第一限位凸起上设有第二限位凸起，所述盖体的两侧设有相应的限位凹口以容纳所述第二限位凸起，所述第二限位凸起用于对所述盖体进行限位。
本压电驱动式快门结构紧凑，占用体积小，有利于镜头模组小型化，成本低，并且组装和控制方便。
根据本发明的另一方面，还提供了一种镜头模组，所述镜头模组包括镜头和快门，所述快门包括如上所述的压电驱动式快门。
根据本发明的又一方面，还提供了一种照相设备，其中，所述照相设备包括如上所述的镜头模组。
附图说明
图1是根据本发明实施例的镜头模组的立体图；
图2是图1所示的镜头模组的另一立体图，其中，盖体和镜头被去除；
图3是图1所示的镜头模组的分解图；
图4是图1所示的镜头模组的盖体的立体图；
图5是图1所示的镜头模组的第一底座的立体图；
图6是图1所示的镜头模组的第二底座的立体图；
图7是图1所示的镜头模组的压电驱动机构的立体图；
图8是图1所示的镜头模组的活动机构的分解图；
图9是图8所示的活动机构的夹持组件的立体图；
图10是图8所示的活动机构的活动块的立体图。
具体实施方式
以下将结合附图对本发明的优选实施例进行详细说明，以便更清楚理解本发明的目的、特点和优点。应理解的是，附图所示的实施例并不是对本发明范围的限制，而只是为了说明本发明技术方案的实质精神。
在下文的描述中，出于说明各种公开的实施例的目的阐述了某些具体细节以提供对各种公开实施例的透彻理解。但是，相关领域技术人员将认识到可在无这些具体细节中的一个或多个细节的情况来实践实施例。在其它情形下，与本申请相关联的熟知的装置、结构和技术可能并未详细地示出或描述从而避免不必要地混淆实施例的描述。
除非语境有其它需要，在整个说明书和权利要求中，词语“包括”和其变型，诸如“包含”和“具有”应被理解为开放的、包含的含义，即应解释为“包括，但不限于”。
在整个说明书中对“一个实施例”或“一实施例”的提及表示结合实施例所描述的特定特点、结构或特征包括于至少一个实施例中。因此，在整个说明书的各个位置“在一个实施例中”或“在一实施例”中的出现无需全都指相同实施例。另外，特定特点、结构或特征可在一个或多个实施例中以任何方式组 合。
如该说明书和所附权利要求中所用的单数形式“一”和“所述”包括复数指代物，除非文中清楚地另外规定。应当指出的是术语“或”通常以其包括“和/或”的含义使用，除非文中清楚地另外规定。
在以下描述中，为了清楚展示本发明的结构及工作方式，将借助诸多方向性词语进行描述，但是应当将“前”、“后”、“左”、“右”、“外”、“内”、“向外”、“向内”、“上”、“下”等词语理解为方便用语，而不应当理解为限定性词语。
此外，术语“水平”、“竖直”、“悬垂”等术语并不表示要求部件绝对水平或悬垂，而是可以稍微倾斜。如“水平”仅仅是指其方向相对“竖直”而言更加水平，并不是表示该结构一定要完全水平，而是可以稍微倾斜。
在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
请参照图1-3，其中，图1是根据本发明实施例的镜头模组的立体图；图2是图1所示的镜头模组的另一立体图，其中，将盖体和镜头去除以示出内部结构；图3是图1所示的镜头模组的分解图。如图1-3所示，根据本发明实施例的镜头模组可包括压电驱动式快门和镜头100。在本实施例中，镜头100包含镜头安装座。压电驱动式快门可包括壳体1及安装在壳体1内的压电驱动机构2和活动机构3。其中，壳体1设有第一进光孔111和镜头安装部14，镜头100安装在镜头安装部14内并与第一进光孔111对准。活动机构3包括活动挡板31，活动挡板31具有第二进光孔311。压电驱动机构2与活动挡板31驱动连接，以带动活动挡板31在遮光位置和进光位置之间切换；其中，在遮光位置，活动挡板31遮住第一进光孔111(或镜头100)，而在进光位置，第一进光孔111与第二进光孔311对准。具体地说，当按下快门键时，压电驱动机构2带动活动挡板31从遮光位置移动到进光位置，即快门打开，光从第 一进光孔111和第二进光孔311进入到镜头100内；照相完成后，压电驱动机构2带动活动挡板31从进光位置移动到遮光位置，即快门关闭，活动挡板31对镜头100进行遮挡，光无法进入镜头100内。通过控制压电驱动机构2的作用电压和时间，可以方便地调整快门打开的时间，以适应专业拍照需求。本压电驱动式快门结构紧凑，占用体积小，有利于镜头模组小型化，成本低，并且组装和控制方便。
在本实施例中，壳体1可包括盖体11、第一底座12和第二底座13。盖体11呈大致长方体罩壳形状，如图3所示，其底部和一端(图3中的左端敞开)，盖体11的顶部设有第一进光孔111，第一底座12和第二底座13位于盖体11内且彼此间隔开，其之间形成镜头安装部14。盖体11与第一底座12和第二底座13固定连接(例如，通过卡接方式或胶水粘接方式)后构成中空腔体，压电驱动机构2和活动机构3设置在该中空腔体内，具体地位于第一底座12与盖体11的顶板之间。
如图3-8所示，盖体11包括顶板112、前后侧板113和右侧板114。其中，第一进光孔111开设在顶板112上。前后侧板113在镜头安装部14处形成有缺口，以避让镜头100。第一进光孔111呈矩形。此外，顶板112两侧还设有与第一底座12和第二底座13上的第二限位凸起122和132配合的限位凹口115。限位凹口115呈U字形。右侧板114与前后侧板113之间间隔开，以让位于设置在第二底座13右端两侧的限位筋条133。右侧板114紧贴在第二底座13的右端面上。应理解，盖体11并不限于上述形状，只要能够与第一底座12和第二底座13固定连接并形成容纳压电驱动机构2和活动机构3的空间即可。例如盖体11可省略前侧板或后侧板。
第一底座12和第二底座13分别设置在镜头100的两侧，其彼此相对面形成一个圆弧缺口，用于安放镜头100。第一底座12的右端顶部两侧以及第二底座左端顶部两侧均设置有沿长度方向延伸的第一限位凸起121和131，其用于对活动挡板31进行限位。第一限位凸起121和131的高度大于活动挡板31的厚度，可以对盖体11的底面进行支撑，以避免盖体11底面对活动挡板31造成挤压。第二限位凸起122和132设置在第一限位凸起121和131的顶面上，其用于与限位凹口115配合对盖体11进行限位。第二限位凸起122和132的 大小形状与盖体11上的限位凹口115大致相同；且第二限位凸起122和132的高度与顶板112的厚度基本相同，从而当盖体11与第一底座12和第二底座13固定在一起时，第二限位凸起122和132与盖体11的上表面齐平，使得整个壳体1外观整齐。第一底座12和第二底座13外侧的底端均设置有点胶槽120和130，在盖体11套接在第一底座12和第二底座13的外侧后，通过对点胶槽120和130进行点胶来实现盖体11与底座(第一底座12和第二底座13)之间的粘接。应理解，第一底座12以及盖体11之间也可形成其他类型的限位结构来使得盖体11相对于第一底座12进行定位，而不限于上述第二限位凸起122和132和限位凹口115。例如也可在第一限位凸起121和131的顶面上形成凹陷，而在盖体11的底面形成相应的突起。
第一底座12为沿长度方向中间低两边高的结构，包括底板和在底板长度方向两端向上延伸的两个端部。第一底座12的中部，即在底板上设置有沿长度方向延伸的活动块安装槽123，其用于安装活动块32，活动块32可在活动块安装槽123内沿长度方向运动，两个端部分别位于活动块安装槽123的两端。第一底座12在活动块安装槽123的左侧沿长度方向依次设置有U形支撑架124、变形块安装槽125和配重块安装槽126。U形支撑架124大致垂直于长度方向设置，U形支撑架124的两个臂从底板向上延伸，两个臂之间形成容纳区域。变形块安装槽125和配重块安装槽126形成在左侧端部内且均向上敞开并沿长度方向彼此贯通。第一底座12在活动块安装槽123的右侧设置有U形支撑槽127，U形支撑槽127从右侧端部面向活动块安装槽123的端面凹陷而成，其横截面方向呈U形且朝向顶部开口，U形支撑槽127的右侧面较佳地设有镂空孔128。U形支撑架124和U形支撑槽127位于活动块安装槽123的两端，用于对摩擦棒23进行支撑和限位，避免摩擦棒23在移动过程中出现偏移。U形支撑架124和U形支撑槽127的凹槽宽度与摩擦棒23的直径基本相同。变形块安装槽125和配重块安装槽126分别用于安装压电变形块22和配重块21。镂空孔128用于避让摩擦棒23，当摩擦棒23向右移动时，可以进入镂空孔128中。镂空孔128的直径与摩擦棒23的直径基本相同。第一点胶槽1212设置在配重块安装槽126的左侧，用于点胶并将第一底座12和配重块21侧壁粘接。第一点胶槽1212内优选地设置有连接凸起1213，其为了增大第一底座12与配 重块21侧壁的粘接面积，提高粘接稳固性。
第一底座12在U形支撑槽127上方设置有承重平台避让槽129，该承重平台避让槽129从右侧端部的顶面向下凹陷形成，且其宽度大于U形支撑槽127的宽度，从而在承重平台避让槽129的底面两侧形成有支撑台肩。在活动块32移动到活动块安装槽123右侧时，活动块32上的承重平台322伸到承重平台避让槽129内，可以增大活动块32的移动范围。
第二底座13呈大致L形，其与第一底座12的右端部分大致成镜像对称。第二底座13的顶部右端具有沿宽度方向延伸的止挡凸起134，该止挡凸起134一方面用于对活动挡板31沿长度方向的移动范围进行限制，另一方面用于支撑盖体11的底面。即止挡凸起134的高度与第二底座13上的第一限位凸起131的高度相同。
盖体11、第一底座12和第二底座13均可以采用挤压成型工艺或注塑成型工艺制成，以实现批量生产，降低成本。
如图3、5和10所示，第一底座12的活动块安装槽123的两端壁面上设有缓冲块1214，该缓冲块1214用于与活动块32两端的相应缓冲块327配合，以避免活动块32与第一底座12之间发生硬碰撞而引起振动和损坏，从而提高使用寿命。
此外，如图3、5和7所示，第一底座12的左侧内部设置有内置线路，内置线路一端位于第一底座12左侧端面上，形成第一通电点1210，用于与外部电路(例如，相机的控制单元)连接；内置线路另一端位于变形块安装槽125的两侧，形成第二通电点1211，用于与压电变形块22上的连接线221相连接。内置线路通常在第一底座12成型时注塑在第一底座12内，第一底座12设置有内置线路定位凸起，其从第一点胶槽1212的底面突出，用于内置线路注塑时的定位操作，在第一点胶槽1212内涂胶后将其覆盖。
压电驱动机构2利用压电材料的逆压电效应来获得驱动力，其结构可根据需要设计。具体地，如图3、5和7所示，压电驱动机构2可包括沿长度方向依次连接在一起的配重块21、压电变形块22和连接件23。在所示实施例中，配重块21和压电变形块22为长方体状，连接件23为圆棒状。因此，本文中，连接件23也称为摩擦棒23。优选地，摩擦棒23为碳棒，以使摩擦棒23具有 更大的摩擦力。配重块21和压电变形块22分别安装在第一底座12的配重块安装槽126和变形块安装槽125。具体地，本实施例中，压电变形块22悬空设置在变形块安装槽125内，配重块21同样悬空设置在配重块安装槽126内。也就是说，压电驱动机构2中，只有摩擦棒23的底面与第一底座12的U形支撑架124和U形支撑槽127相接触，起到支撑作用。即，配重块21和压电变形块22均利用摩擦棒23的支撑力来进行支撑。当然，第一底座12的变形块安装槽125和配重块安装槽126还会对压电变形块22和配重块21的外侧沿宽度方向进行限位，仅仅不对其底部进行支撑。配重块21的左端壁通过将胶水点到第一点胶槽1212中而与第一底座12固定连接在一起。压电变形块22两侧设置有连接线221并通过连接线221与第一底座12上的第二通电点连接。压电变形块22通电变形后驱动摩擦棒23进行运动，从而带动活动机构3进行运动，实现对镜头100的打开和遮挡操作。
如图3-10所示，活动机构3可包括活动挡板31、活动块32、夹板33和簧片34。活动挡板31为长条板状结构，包括第一挡板部分(也称为左边部分)31a和第二挡板部分(也称为右边部分)31b，其中，第一挡板部分31a固定在活动块32上，第二挡板部分31b伸出活动块32。在本实施例中，活动挡板31为变径结构。具体地说，活动挡板31的第一挡板部分31a宽度较小，其与活动块32上的挡板安装槽配合实现限位；而活动挡板31的第二挡板部分32b宽度较大，其与第一底座12和第二底座13顶端的第一限位凸起121和131配合实现限位，以在两者之间沿长度方向移动。活动挡板31的左端设置有安装卡槽312，用于容纳活动块32上的安装凸起3213。活动挡板31的右边部分31b上设置有第二进光孔311。在需要进光时，令第二进光孔311位于镜头100上方并与设置在盖体11上的第一进光孔111相对应；在照相结束后，通过活动挡板31的移动令第二进光孔311从镜头偏移，实现对镜头100的遮挡操作。
活动块32为沿长度方向中间凹两端高的结构，如图10所示，包括位于活动块32两端垂直于长度方向向上延伸的两个端壁。活动块32的长度方向(或运动方向)的两端顶部分别设置有安装平台321和承重平台322。安装平台321和承重平台322的顶面均设置有挡板安装槽(即，第一挡板安装槽3211和第二挡板安装槽3221)，用于对活动挡板31进行安装限位。第一挡板安装槽3211 和第二挡板安装槽3221内设置有相应点胶槽(第二点胶槽3212和3222)，用于将活动块32与活动挡板31粘接在一起。第二点胶槽3212和3222的深度一般小于0.5mm。安装平台321的挡板安装槽(即，第一挡板安装槽3211)的底面设置有安装凸起3213，用于与活动挡板31上的安装卡槽312卡合。安装平台321和承重平台322从活动块32两端的端壁顶部向外延伸，可以增大活动块32与活动挡板31之间的支撑面积，令两者之间的连接结构更加稳固。
活动块32设置有沿长度方向延伸的碳棒安装槽323和贯通两端壁的导向孔324，碳棒安装槽323与导向孔324连通。碳棒安装槽323和导向孔324均用于安装压电驱动机构2的摩擦棒23。活动块32在顶面宽度方向两侧设置有夹板安装槽325，即夹板安装槽325设置在碳棒安装槽323两侧并与碳棒安装槽323正交连通。夹板安装槽325的两侧底部具有两级台阶结构，具体来说，夹板安装槽325通过在活动块32在夹板安装槽325两侧的顶面向下凹陷形成一矩形凹陷区域，然后在该矩形凹陷区域的底部再形成长度更短且靠近夹板安装槽的边长向外偏移的另一矩形凹陷而形成，从而在夹板安装槽325长度方向的两端形成两级台阶，以方便夹板33的安装。活动块32在夹板安装槽325沿长度方向的两侧设有簧片连接柱326，用于安装簧片34。簧片连接柱326的上部分为圆锥台形，以方便簧片34安装。簧片连接柱326的下部分的外径通常稍大于簧片34的簧片连接孔343，以确保连接紧固。应理解，夹板33与活动块32的连接方式和簧片34与活动块32的连接方式并不受上述具体方式的限制，只要能够实现彼此的连接即可。
此外，活动块32的底部两侧设置有定位缺口328，方便生产时的定位，同时减轻重量。
活动块32通常由塑料制成，例如可以采用挤压成型工艺或注塑成型工艺一体成型。
夹板33为横截面呈“V”字形的弯折板，以将摩擦棒23夹在中间。夹板33的两个半部之间的夹角通常在80-110度之间并且夹角部进行倒圆处理。夹板33的每个半部包括从内向外长度依次对称缩短的三个矩形部分，从而两边分别形成三级台阶结构。各部分之间的夹角进行倒圆处理，以避免因应力集中而容易断裂，进而影响使用寿命。夹板33可以由弹性材料制成。其中，最外 侧部分称为夹板凸起331。安装时，夹板凸起331卡接在活动块32的夹板安装槽325内，并且夹板33的其余部分位于活动块32的碳棒安装槽323中。
簧片34包括位于宽度中间且沿长度方向延伸的夹持部分341和从夹持部分341向两侧延伸的四个连接部分342。其中，每个连接部分342的末端具有簧片连接孔343，簧片连接孔343用于与活动块32的簧片连接柱326配合，以将簧片34固定在活动块32上。优选地，簧片连接孔343和簧片连接柱326采用过盈配合，以避免脱落。连接部分342具有镂空结构，以减小其重量。具体地，每个连接部分342包括多折曲线筋条3421和连接片3422，其中，多折曲线筋条3421一端连接夹持部分341，另一端连接于连接片3422。在所示实施例中，多折曲线筋条3421通过10个弯折使其两端在簧片34的长度方向和宽度方向分别错开一定距离，进而使连接片3422位于簧片34的四个角。簧片34可以由具有弹性的金属或非金属材料一体制成。在安装时，摩擦棒23位于簧片34与夹板33之间，通过簧片34与夹板33的弹性作用力将摩擦棒23与活动块32固定连接。因此，摩擦棒23可以带动活动块32移动。应理解，簧片34并不限于上述结构，只要其具有弹性，并能够在两侧固定至活动块32并与夹板33配合将摩擦棒23夹持在其间即可。
在本实施例中，摩擦棒23是通过夹板33和簧片34与活动块32固定在一起的。应该理解，摩擦棒23也可以通过其它方式(例如，卡接、螺纹连接或螺钉固定等)与活动块32固定在一起。
下面说明一下本镜头模组的安装过程。首先，将压电驱动机构2通过夹板33和簧片34与活动块32固定安装在一起；然后将它们一起安装在第一底座12中并在第一点胶槽1212点入胶水，以使配重块21与第一底座12固定连接；接着在第二点胶槽3212和3222点入胶水并将活动挡板31固定安装在活动块32上；然后将压电变形块22的连接线221与第一底座12上的第二通电点焊接在一起；再将盖体11罩在第一底座12和第二底座13上并在相应点胶槽点入胶水使盖体11与第一底座12和第二底座13组成一个整体；最后再将镜头100安装到镜头安装部14上。整个安装过程非常简单方便，基本上无需使用额外工具。
此外，根据本发明的另一实施例，还提供了一种照相设备，该照相设备包 括如上的镜头模组。照相设备可以是照相机及具有照相功能的手机、平板电脑和监控摄像头等。
以上已详细描述了本发明的优选实施例，但应理解到，在阅读了本发明的上述讲授内容之后，本领域技术人员可以对本发明作各种改动或修改。这些等价形式同样落于本申请所附权利要求书所限定的范围。

Claims (20)

  1. 一种压电驱动式快门，其特征在于，所述压电驱动式快门包括壳体及安装在所述壳体内的压电驱动机构和活动挡板，所述壳体设有第一进光孔和镜头安装部，所述镜头安装部用于安装镜头，所述活动挡板具有第二进光孔，所述压电驱动机构与所述活动挡板驱动连接，以带动所述活动挡板在遮光位置和进光位置之间切换，其中，在所述遮光位置，所述活动挡板遮住所述第一进光孔，而在所述进光位置，所述第一进光孔与所述第二进光孔对准。
  2. 根据权利要求1所述的压电驱动式快门，其特征在于，所述压电驱动机构包括依次固定连接在一起的配重块、压电变形块和连接件，所述连接件与所述活动挡板驱动连接，所述压电变形块在通电情况下变形以带动所述连接件直线运动。
  3. 根据权利要求2所述的压电驱动式快门，其特征在于，所述压电驱动式快门还包括活动块，所述活动块安装在所述壳体内，所述活动挡板固定在所述活动块上，并且所述连接件与所述活动块固定连接。
  4. 根据权利要求3所述的压电驱动式快门，其特征在于，所述连接件为碳棒。
  5. 根据权利要求4所述的压电驱动式快门，其特征在于，所述连接件通过弹性夹持组件固定于所述活动块。
  6. 根据权利要求5所述的压电驱动式快门，其特征在于，所述弹性夹持组件包括夹板和簧片，所述夹板和所述簧片固定在所述活动块上，所述连接件被夹持在所述夹板和所述簧片之间。
  7. 根据权利要求6所述的压电驱动式快门，其特征在于，所述夹板为横截面呈“V”字形的弯折板，并且所述簧片具有镂空结构。
  8. 根据权利要求6所述的压电驱动式快门，其特征在于，所述活动块具有碳棒安装槽和夹板安装槽，所述碳棒安装槽设置在所述活动块的顶面并沿所述活动块的长度方向延伸，所述连接件固定安装在所述碳棒安装槽中，所述夹板安装槽设置在所述活动块顶面的宽度方向的两侧上，所述夹板的宽度方向两侧设置有夹板凸起，所述夹板凸起卡接在所述夹板安装槽内，所述活动块在所述夹板安装槽沿长度方向的两侧设有簧片连接柱，所述簧片上设有连接孔，所述连接 孔套接在所述簧片连接柱上，所述活动块的两端设有从所述活动块的顶面垂直于所述活动块的长度方向延伸的端壁，所述端壁内设有贯通的导向孔，所述导向孔彼此同轴并与所述碳棒安装槽连通，且所述连接件穿过所述导向孔。
  9. 根据权利要求4所述的压电驱动式快门，其特征在于，所述活动块的长度方向的两端分别设置有从顶部向外延伸的安装平台和承重平台，所述安装平台和所述承重平台上分别设置有第一挡板安装槽和第二挡板安装槽，其中，所述第一挡板安装槽内设置有安装凸起，用于与所述活动挡板上的安装卡槽卡合，所述第一挡板安装槽和所述第二挡板安装槽内均设置有点胶槽，用于所述活动块与所述活动挡板的粘接。
  10. 根据权利要求9所述的压电驱动式快门，其特征在于，所述壳体包括第一底座、第二底座和盖体，所述第一底座和所述第二底座之间形成所述镜头安装部，所述活动块和所述压电驱动机构安装在所述第一底座内，所述盖体设置有所述第一进光孔。
  11. 根据权利要求10所述的压电驱动式快门，其特征在于，所述第一底座的中部设有活动块安装槽，所述活动块可沿长度方向运动地安装在所述活动块安装槽中，所述活动块安装槽沿长度方向的两侧分别设有U形支撑架和U形支撑槽，所述连接件由所述U形支撑架和所述U形支撑槽支撑限位。
  12. 根据权利要求11所述的压电驱动式快门，其特征在于，所述第一底座还设有承重平台避让槽，所述承重平台避让槽位于所述U形支撑槽的上方。
  13. 根据权利要求11所述的压电驱动式快门，其特征在于，所述第一底座还设有配重块安装槽和变形块安装槽，所述变形块安装槽与所述活动块安装槽分别位于所述U形支撑架两侧，所述配重块安装槽位于所述变形块安装槽远离所述U形支撑架的一侧，所述配重块和所述压电变形块分别悬空安装在所述配重块安装槽和所述变形块安装槽中。
  14. 根据权利要求13所述的压电驱动式快门，其特征在于，所述配重块安装槽设有第一点胶槽，所述第一点胶槽用于点胶并将所述第一底座与所述配重块的侧壁粘接。
  15. 根据权利要求13所述的压电驱动式快门，其特征在于，所述第一底座设有内置线路，所述内置线路的一端位于底座外侧端面上，形成第一通电点，用于 与外部电路连接，并且所述内置线路的另一端位于所述变形块安装槽的两侧，形成第二通电点，用于与所述变形块上的连接线相连接。
  16. 根据权利要求10所述的压电驱动式快门，其特征在于，所述第一底座和所述第二底座的彼此相对面形成圆弧缺口，所述圆弧缺口用于避让镜头。
  17. 根据权利要求10所述的压电驱动式快门，其特征在于，所述第一底座和所述第二底座的顶端两侧设有第一限位凸起，所述第一限位凸起用于对所述活动挡板进行限位。
  18. 根据权利要求17所述的压电驱动式快门，其特征在于，所述第一限位凸起上设有第二限位凸起，所述盖体的两侧设有相应的限位凹口以容纳所述第二限位凸起，所述第二限位凸起用于对所述盖体进行限位。
  19. 一种镜头模组，其特征在于，所述镜头模组包括镜头和快门，所述快门包括如权利要求1-18中任一项所述的压电驱动式快门。
  20. 一种照相设备，其特征在于，所述照相设备包括如权利要求19所述的镜头模组。
PCT/CN2023/119723 2022-09-20 2023-09-19 压电驱动式快门、镜头模组及照相设备 WO2024061214A1 (zh)

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CN116054628A (zh) * 2023-03-29 2023-05-02 睿恩光电有限责任公司 基于弹性和超声压电的驱动装置、旋转电机、电子设备

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