CN220569050U

CN220569050U - Piezoelectric driving shutter

Info

Publication number: CN220569050U
Application number: CN202322255981.1U
Authority: CN
Inventors: 汪仁德; 张雅卉; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-03-08
Anticipated expiration: 2033-08-22

Abstract

The utility model discloses a piezoelectric driving shutter which comprises a first base, a second base, a piezoelectric piece, a movable frame and a shielding plate, wherein the first base is provided with a first end and a second end, a plurality of metal strips are arranged in the first base, and at least two metal strips are arranged in an insulating mode and are partially exposed at the second end. The second base and the second end are relatively spaced to form a containing groove and a light shielding hole. The piezoelectric element comprises a deformation block and a friction rod, and the deformation block is connected with the first end; the friction rod is connected with the deformation block, and can vibrate along with the deformation of the deformation block; the movable frame is connected with the friction rod and is provided with a conductive piece; the shielding plate is connected with the movable frame and extends along a first direction; the friction rod can drive the movable frame and the shielding plate to move between a shading position and a shading position; at the shading position, the shading plate shields the shading hole, and the conducting piece touches parts of the two metal strips exposed at the second end; in the light-shielding position, the shielding plate shields the light-shielding hole, and the conductive piece is far away from the part of the two metal strips exposed at the second end.

Description

Piezoelectric driving shutter

Technical Field

The utility model relates to the technical field of lens driving, in particular to a piezoelectric driving shutter.

Background

The shutter is usually arranged outside the lens, and the shielding operation of the lens is realized through actions, when the shutter is pressed down, the shutter is opened, so that light enters the lens; after photographing is completed, the shutter is closed, the lens is shielded, and light cannot enter the lens.

Shutters are classified into mechanical shutters and electronic shutters. Mechanical shutters are divided into two main types, namely purely mechanical driving and mechanically electromagnetic driving. The existing mechanical electromagnetic driving shutter structure is relatively complex, has relatively large volume and is unfavorable for miniaturization of the camera.

Also in the prior art, in order to flexibly drive the shutter operation, it is generally necessary to install a sensor to sense the internal operation of the shutter, such as the position of a shutter plate. For a mechanical electromagnetic driving shutter, after the sensor is installed, the whole structure is more complex, the whole shutter body type is increased, and the miniaturization of a camera is more unfavorable.

Disclosure of Invention

The present utility model aims to provide a piezoelectric driven shutter to solve the above problems.

To solve the above-mentioned technical problem, embodiments of the present utility model provide a piezoelectric driven shutter, including:

the first base extends along a first direction and is provided with a first end and a second end opposite to the first end, a plurality of metal strips are arranged in the first base and are used for being electrically connected with an external power supply, and at least two metal strips are arranged in an insulating mode and are partially exposed to the second end;

the second base and the second end are relatively spaced to form a containing groove and a light-shielding hole, the containing groove is used for containing the lens, and the light-shielding hole is communicated with the containing groove and is positioned above the containing groove;

a piezoelectric element, the piezoelectric element comprising:

the deformation block is connected with the first end; and

a friction bar, one end of which is connected with the deformation block, and the other end of which extends toward the second end along the first direction, the friction bar being vibratable along with the deformation of the deformation block;

the movable frame is connected with the friction rod and is provided with a conductive piece; and

the shielding plate is connected with the movable frame and extends along the first direction;

the friction rod is operable to drive the movable frame and the shielding plate to move along the first direction and between a shading position and a light-shielding position;

in the shading position, the shading plate shields the shading hole, and the conducting piece touches parts of the two metal strips exposed at the second end; in the light-shielding position, the shielding plate is away from the light-shielding hole, and the conductive piece is away from the part of the two metal strips exposed at the second end.

In one embodiment, a plurality of the metal strips are arranged in an insulated manner, and two of the metal strips are electrically connected with the deformation block.

In one embodiment, the ends of both of the metal strips are exposed to the second end;

the shielding plate is arranged at the shielding position, and the conducting piece touches the end parts of the two metal strips; in the light-shielding position, the conductive piece is far away from the end parts of the two metal strips.

In one embodiment, one end of each of the four metal strips is exposed to the first end, wherein the other ends of the two metal strips are respectively electrically connected with the deformation blocks, and the other ends of the other two metal strips are exposed to the second end.

In one embodiment, the other ends of the other two metal strips are resilient in the first direction and exposed to the second end.

In one embodiment, the second end comprises:

the vertical plates extend in the vertical direction and form the accommodating groove with the second base, the first direction is perpendicular to the vertical direction, and the end parts of the two metal strips are exposed to the side surface of the vertical plates facing the first end; and

a horizontal plate extending from the top end of the vertical plate in the first direction and away from the first end, the horizontal plate and the second base forming the light-shielding hole;

a portion of the lens is mounted below the horizontal plate.

In one embodiment, the movable frame is provided with a mounting hole extending along the first direction, and a part of the friction rod is positioned in the mounting hole;

the piezoelectric driven shutter further includes:

the first elastic piece is positioned at the top of the friction rod; and

the second elastic piece is positioned between the bottom of the friction rod and the inner wall of the mounting hole.

In one embodiment, the mounting hole is open toward the top;

one end of the shielding plate covers the top of the mounting hole;

the first elastic sheet is positioned between the top of the friction rod and the shielding plate.

In one embodiment, the piezoelectric element further comprises a weight connected to the first end and the deformation block.

In one embodiment, the piezoelectric driven shutter further includes a housing covering the first base, the second base, the movable frame, the piezoelectric element, and the shielding plate, and having a light inlet hole, wherein the light inlet hole is aligned with the light shielding hole along a vertical direction.

Drawings

Fig. 1 is an assembly view of a piezoelectric driven shutter according to an embodiment of the present utility model.

Fig. 2, 3, 4 and 5 are exploded views of the piezoelectric driven shutter of the embodiment shown in fig. 1.

Fig. 6 is an exploded view of the piezoelectric element and the movable frame in the embodiment shown in fig. 2.

Fig. 7 is a perspective view of the first base and the second base in the embodiment shown in fig. 2.

Fig. 8 is a perspective view of a plurality of metal strips.

Reference numerals: 100. a piezoelectric driven shutter; 1. a first base; 11. a first end; 12. a second end; 13. a vertical plate; 14. a horizontal plate; 15. a metal strip; 151. a first metal strip; 152. a second metal strip; 153. a body; 154. a connection end; 2. a second base; 3. a movable frame; 31. a mounting hole; 32. a first elastic sheet; 33. a second spring plate; 4. a piezoelectric member; 41. a deformation block; 42. a friction bar; 43. balancing weight; 44. a conductive member; 5. a shielding plate; 6. a housing; 61. a light inlet hole; 7. a receiving groove; 8. and a light shielding hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

The following detailed description of various embodiments of the present utility model will be provided in connection with the accompanying drawings to provide a clearer understanding of the objects, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The utility model relates to a piezoelectric driving shutter 100, which comprises a first base 1, a second base 2, a piezoelectric element 4, a movable frame 3 and a shielding plate 5, wherein the first base 1 and the second base 2 are used for supporting the piezoelectric element 4 and the movable frame 3 and accommodating a lens. The piezoelectric element 4 is connected with the first base 1 and is used for driving the movable frame 3 to move. The shielding plate 5 is connected with the movable frame 3 and can cover or avoid light entering the lens along with the movement of the movable frame 3. A plurality of metal strips 15 are arranged in the first base 1, the metal strips 15 can be connected with an external power supply or an induction piece, and at least two metal strips 15 are arranged in an open circuit state, namely, the two metal strips 15 are connected in an insulating way. The movable frame 3 is provided with the conductive piece 44, and in the moving process of the movable frame 3, the conductive piece 44 can touch the two broken metal strips 15, so that the two broken metal strips 15 are in short circuit, an external induction piece can induce the two broken metal strips 15 to short circuit signals, and then the positions of the movable frame 3 and the shielding plate 5 can be judged, and the moving of the movable frame 3 can be effectively controlled. The structure of the piezoelectric driven shutter 100 according to an embodiment of the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the first chassis 1 extends in a first direction and has a first end 11 and a second end 12 opposite to the first end 11 in the first direction, the second end 12 including a vertical plate 13 and a horizontal plate 14, wherein the vertical plate 13 extends in a vertical direction perpendicular to the first direction, and the horizontal plate 14 is connected to a top end of the vertical plate 13 and extends in the first direction toward a direction away from the first end 11. The second base 2 is substantially symmetrical to the second end 12 and also has a vertical plate and a horizontal plate, and the second base 2 and the second end 12 are disposed at opposite intervals along the first direction, and the vertical plate of the second base 2 and the vertical plate 13 of the first base 1 are disposed at intervals along the first direction and form a receiving groove 7 for receiving a lens. The horizontal plate of the second base 2 and the horizontal plate 14 of the first base 1 are arranged at intervals along the first direction and form a light shielding hole 8, and the light shielding hole 8 extends along the vertical direction and is communicated with the accommodating groove 7 for shielding light entering the lens.

The lens is arranged between the two vertical plates and positioned below the two horizontal plates, the optical axis direction of the lens is vertical, the lens passes through the light shielding hole 8, and light can be projected into the lens from the light shielding hole 8.

It should be understood that the first chassis 1 and the second chassis 2 may be provided in other shapes, and the present utility model is not limited to the specific shapes of the first chassis 1 and the second chassis 2.

Four metal strips 15 are embedded in the first base 1 and are arranged in an insulating manner at intervals, the four metal strips 15 are respectively provided with two end parts, and one end part of the four metal strips 15 is positioned at the first end 11 and is used for being electrically connected with an external power supply or induction piece. Of the four metal strips 15, two metal strips 15 are located near the first end 11, the two metal strips 15 are defined as first metal strips 151, and the other ends of the two first metal strips 151 are respectively connected with the deformation block 41 and used for supplying current to the deformation block 41 to drive the deformation block 41 to deform. The other two metal strips 15 extend from the first end 11 to the second end 12, and the other end is exposed to the side of the vertical plate 13 facing the first end 11, and the two metal strips 15 are defined as second metal strips 152, one end of the two second metal strips 152 is located at the first end 11, the other end is located at the side of the vertical plate 13, and the two second metal strips 152 are arranged at intervals and located at the two ends of the vertical plate 13 to form an open circuit state.

The second metal strip 152 includes a body 153 and a connection end 154, the body 153 extending in the first direction, the connection end 154 being an end of the second metal strip 152, the connection end 154 being located on a side of the vertical plate 13 facing the first end 11. In the embodiment shown in fig. 7 and 8, the connection end 154 extends in a vertical direction for connection with the conductive member 44 of the movable frame 3. It should be appreciated that the connecting end 154 may also be inclined at an angle to the body 153, for example, the top end of the connecting end 154 may be disposed inclined toward the first end 11 or slightly protruding from the side of the vertical plate 13. When the conductive member 44 moves to the second end 12 along with the moving frame 3, the conductive member 44 can touch the two connecting ends 154 and electrically connect the two second metal strips 152, and the external sensing member can sense the position of the moving frame 3 at this time.

In order to increase the stability of the two connection ends 154 after touching the conductive member 44, the top ends of the two connection ends 154 may be bent toward the first end 11, or bent toward the first end 11 for multiple times, or spirally and slightly protruded from the side of the vertical plate 13 facing the first end 11, that is, after the top ends of the connection ends 154 are bent, the whole connection ends 154 are L-shaped, the connection ends 154 and the body 153 cooperate to form a U-shape, and the top ends of the connection ends 154 are provided with multiple times of bending or spiral shapes, so that the top ends of the connection ends 154 have elasticity along the first direction. When the movable frame 3 moves to the second end 12, the conductive member 44 of the movable frame 3 may press the top end of the connection end 154, and the elasticity of the connection end 154 may make the top end of the connection end 154 stably contact with the conductive member 44.

Optionally, more second metal strips 152 may be disposed in the first base 1, for example, the connection ends 154 of four or more second metal strips 152 are respectively exposed on the side surfaces of the vertical plate 13, any two connection ends 154 may form a conductive connection state after contacting with the conductive member 44, and the plurality of second metal strips 152 may increase the sensitivity of detecting the position of the movable frame 3.

The piezoelectric element 4 comprises a balancing weight 43, a deformation block 41 and a friction rod 42, wherein the balancing weight 43 and the deformation block 41 are respectively connected with the first end 11 of the first base 1, and the friction rod 42 is connected with the deformation block 41.

Specifically, the first end 11 of the first base 1 is provided with a mounting groove for accommodating the deformation block 41 and the balancing weight 43, and the deformation block 41 and the balancing weight 43 are respectively mounted in the mounting groove, wherein the balancing weight 43 is located on a side surface of the deformation block 41 away from the first end 11. The friction bar 42 extends in a first direction and is located between the first end 11 and the second end 12, one end of the friction bar 42 being connected to a side of the deformation block 41 facing away from the weight 43. When the deformation block 41 is deformed, the friction bar 42 may be caused to vibrate.

The movable frame 3 is movably connected with the friction rod 42, and the conductive member 44 is embedded in the movable frame 3 and is exposed to the side of the movable frame 3 away from the first end 11. When the friction bar 42 vibrates, the movable frame 3 can be driven to move along the first direction, and when the movable frame 3 moves to a position close to the second end 12, the conductive piece 44 can touch the connecting end 154 of the second metal strip 152, so that the two second metal strips 152 are electrically connected.

The conductive member 44 may be a conductive metal block or a conductive metal sheet attached to the side of the movable frame 3 facing the second end 12, so long as two second metal strips 152 can be short-circuited and form an induction signal. The conducting piece 44 and the two second metal strips 152 embedded in the first base 1 are matched with the positions of the induction shielding plate 5 and the movable frame, so that the shutter is judged to be in an open or closed state, the structure is simple, no additional sensor component is required to be installed, and the volume of the piezoelectric driving shutter can be maintained.

The shielding plate 5 extends in a first direction, and one end of the shielding plate 5 is connected to the top surface of the movable frame 3, and the other end extends in a direction away from the first end 11, and the top of the movable frame 3 is substantially flush with the top surface of the horizontal plate 14 or higher than the top surface of the horizontal plate 14, so that the shielding plate 5 moves along the top surface of the horizontal plate 14.

When the movable frame 3 moves along the first direction, the shielding plate 5 can be driven to move between a shading position and a shading position, wherein in the shading position, the movable frame 3 is close to the second end 12, and the conductive piece 44 touches the connecting end 154 of the second metal strip 152, so that the two second metal strips 152 are in short circuit, at the moment, the shielding plate 5 shields the shading hole 8 to prevent light from entering the lens, the sensing piece senses the position of the movable frame 3, and the piezoelectric piece 4 can be controlled to stop working; in the light-shielding position, the movable frame 3 is close to the first end 11, the conductive member 44 is far away from the connecting end 154 of the second metal strip 152, the shielding plate 5 is prevented from leaving the light-shielding hole 8, and light can be projected into the lens from the outside.

The utility model can realize the monitoring of the switch state of the piezoelectric driving shutter 100 by monitoring the circuit conduction state of the second metal strip 152, has simple structure and higher sensitivity, can replace the traditional sensor to sense the position of the movable frame 3, and has higher sensitivity than the traditional sensor.

The movable frame 3 is provided with a mounting hole 31 extending in the first direction, the mounting hole 31 penetrating the movable frame 3 in the first direction and opening toward the top, and a part of the friction rod 42 is located in the mounting hole 31, i.e., the movable frame 3 is mounted on the friction rod 42 through the mounting hole 31. While the end of the shielding plate 5 is connected to the top of the movable frame 3 and covers the top opening of the mounting hole 31.

The surface of the friction rod 42 is a rough surface, and when the friction rod 42 vibrates, the movable frame 3 can be driven to move along the first direction by friction of the inner wall of the mounting hole 31. In order to prevent the friction rod 42 from wearing the inner wall of the mounting hole 31, the utility model also provides a spring piece between the friction rod 42 and the inner wall of the mounting hole 31, the spring piece has elasticity, and the friction rod 42 can be effectively prevented from wearing the inner wall of the mounting hole 31 or the shielding plate 5.

Specifically, the elastic pieces include the first elastic piece 32 and the second elastic piece 33, and the first elastic piece 32 is located between the top of the friction bar 42 and the shielding plate 5, so that the friction bar 42 can be prevented from wearing the shielding plate 5. The second elastic piece 33 is located between the bottom of the friction rod 42 and the inner wall of the mounting hole 31, so that the friction rod 42 can be prevented from wearing the inner wall of the mounting hole 31.

Optionally, the mounting hole 31 extends in the first direction and is not provided with an opening towards the top, the first elastic piece 32 is located between the top of the friction bar 42 and the inner wall of the mounting hole 31, the second elastic piece 33 is located between the bottom of the friction bar 42 and the inner wall of the mounting hole 31, and both the first elastic piece 32 and the second elastic piece 33 are for preventing the friction bar 42 from wearing the inner wall of the mounting hole 31.

In addition, the piezoelectric driven shutter 100 further includes a housing 6, the bottom of the housing 6 is opened, and the bottom of the housing 6 can be connected with the first base 1 and the second base 2, the housing 6 covers the first base 1, the second base 2, the movable frame 3, the piezoelectric element 4, the shielding plate 5, and is provided with a light inlet hole 61, the light inlet hole 61 is aligned with the light shielding hole 8 along a vertical direction, and when the shielding plate 5 is in the light shielding position, light can be projected into the lens from the light inlet hole 61 and the light shielding hole 8.

While the preferred embodiments of the present utility model have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims

1. A piezoelectric driven shutter, comprising:

a piezoelectric element, the piezoelectric element comprising:

the deformation block is connected with the first end; and

2. The piezoelectric driven shutter according to claim 1, wherein a plurality of the metal strips are provided insulated from each other, and two of the metal strips are electrically connected to the deformation block.

3. The piezo actuated shutter as claimed in claim 2, wherein ends of two of the metal strips are exposed to the second end;

4. The piezoelectric actuated shutter as claimed in claim 3, wherein one end of each of the four metal strips is exposed to the first end, wherein the other ends of two of the metal strips are electrically connected to the deformation blocks, respectively, and the other ends of the other two of the metal strips are exposed to the second end.

5. The piezo actuated shutter as claimed in claim 4, wherein the other ends of the other two metal strips have elasticity in the first direction and are exposed to the second end.

6. The piezo actuated shutter as claimed in claim 3 wherein the second end comprises:

a portion of the lens is mounted below the horizontal plate.

7. The piezoelectric driven shutter according to claim 1, wherein the movable frame is provided with a mounting hole extending in the first direction, and a portion of the friction rod is located in the mounting hole;

the piezoelectric driven shutter further includes:

the first elastic piece is positioned at the top of the friction rod; and

8. The piezo actuated shutter as claimed in claim 7, wherein the mounting hole is open toward the top;

one end of the shielding plate covers the top of the mounting hole;

9. The piezo actuated shutter as claimed in claim 1, wherein the piezo element further comprises a weight, the weight being coupled to the first end and the deformation block.

10. The piezoelectric driven shutter according to claim 1, further comprising a housing covering the outside of the first base, the second base, the movable frame, the piezoelectric element, the shielding plate and provided with a light entrance hole, the light entrance hole being aligned with the light shielding hole in a vertical direction.