CN215340644U - Optical actuator and locking mechanism thereof - Google Patents

Abstract

The present disclosure relates to an optical actuator and a locking mechanism thereof, the optical actuator includes a first base and a second base capable of producing relative movement with the first base, the locking mechanism includes a receiving groove formed on one of the first base and the second base, and a catching protrusion movably disposed on the other of the first base and the second base, the catching protrusion is configured to be capable of disengaging from the receiving groove when the optical actuator is turned on to release so that the first base and the second base can move relative to each other, and to catch into the receiving groove when the optical actuator is turned off so as to keep so that the first base and the second base are relatively fixed. The first base body is kept in a power-off state in a mode that the accommodating groove is matched with the clamping protrusion; and when the actuator is used, the clamping convex is separated from the accommodating groove so as to enable the first base body to move. The vibration and the impact of the actuator under the condition of nonuse can be avoided to generate abnormal sound, and the service performance and the service life of the actuator are ensured.

Description

Optical actuator and locking mechanism thereof

Technical Field

The present disclosure relates to the field of optical technologies, and in particular, to an optical actuator and a latch mechanism thereof.

Background

In recent years, with the demands of users, various technologies of shooting equipment are rapidly developed, and the application of the shooting equipment is not limited to cameras, for example, the shooting equipment can be widely applied to cameras and projection equipment of mobile phones, or can be applied to unmanned aerial vehicles for aerial photography or distance measurement and the like. In order to meet the application requirements in various fields, an optical anti-shake technology and an automatic focusing technology are added to an actuator of a shooting device, and in the two technologies, a lens generates different degrees of movement.

At present, with different requirements of users, the shooting device is often fixed on a vehicle, such as a bicycle, or used in extreme sports. In these cases, the shaking of the device can be very severe and when the use of the actuator is not required, the components of the actuator can impact, causing noise or damage. In the related art, when the actuator is not used, the lens still needs to be powered on to keep stable, which causes the temperature of the device to rise, and as the temperature rises, the stability of the system is worse, and the imaging effect is also influenced.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide an optical actuator and a latch mechanism thereof to at least partially solve the problems in the related art.

In order to achieve the above object, the present disclosure provides a locking mechanism of an optical actuator, the optical actuator including a first base and a second base capable of producing relative movement with the first base, the locking mechanism including a receiving groove formed on one of the first base and the second base, and a catching protrusion movably provided on the other of the first base and the second base, the catching protrusion being configured to be capable of disengaging from the receiving groove when the optical actuator is turned on to release to enable the first base and the second base to move relatively, and to catch into the receiving groove when the optical actuator is turned off to keep the first base and the second base relatively fixed.

Optionally, at least one of the receiving groove and the snap projection is configured with an inclined guide surface for guiding the snap projection to be snapped in the receiving groove.

Optionally, the guide surface comprises a conical surface or a spherical surface.

Optionally, the locking structure includes a driving portion disposed on the first base or the second base and a holding portion capable of being driven by the driving portion, the locking protrusion is disposed on the holding portion, and the driving portion is configured to be capable of driving the holding portion to drive the locking protrusion to extend into or withdraw from the receiving groove.

Optionally, the drive portion is made of a shape memory alloy, and the holding portion is connected to the drive portion.

Optionally, the drive portion comprises a bimetal, and the holding portion is connected to the bimetal.

Optionally, the driving portion includes an iron core and a coil wound around the iron core, so that the holding portion can be magnetically attracted to be close to or far from the accommodating groove after the coil is powered on.

Optionally, the corresponding surfaces of the first and second base bodies are each configured as a plane or a spherical surface.

According to a second aspect of the present disclosure, there is also provided an optical actuator including the latch mechanism provided by the present disclosure.

Optionally, the number of the locking mechanisms is two, and two locking mechanisms are arranged at opposite corners of the optical drive.

Through the technical scheme, the locking mechanism can realize the power-off maintenance of the first base body in a mode of matching the accommodating groove and the clamping protrusion when the actuator is not used; and when the actuator is used, the clamping convex is separated from the accommodating groove so as to enable the first base body to move. Through setting up this kind of locking mechanism, can avoid rocking or striking and produce abnormal sound, influence user experience that the actuator produced under the condition of not using, also can guarantee the performance and the life of actuator.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic structural diagram of an actuator provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of an actuator provided in another exemplary embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a locking mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram illustrating two states of a locking mechanism provided by an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a locking mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 9 is a schematic structural view of two states of the locking mechanism provided by the embodiment of FIG. 8;

FIG. 10 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 11 is a schematic structural view of two states of the locking mechanism provided by the embodiment of FIG. 10;

FIG. 12 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 13 is a schematic structural view of two states of the locking mechanism provided by the embodiment of FIG. 12;

FIG. 14 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 15 is a schematic structural view of two states of the locking mechanism provided by the embodiment of FIG. 14;

FIG. 16 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure;

FIG. 17 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure;

fig. 18 is a schematic structural view of a locking mechanism provided in another exemplary embodiment of the present disclosure.

Description of the reference numerals

10-first base, 20-second base, 31-receiving groove, 32-snap, 33-guide surface, 34-drive part, 341-iron core, 342-coil, 343-active layer, 344-passive layer, 35-holding part, 351-connecting plate, 40-elastic structure.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner and outer" is intended with respect to the proper contours of the respective parts, unless otherwise specified. In addition, the terms "first, second, and the like" used in the embodiments of the present disclosure are for distinguishing one element from another, and have no order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 17, the present disclosure provides a latch mechanism of an optical actuator, wherein the optical actuator includes a first substrate 10 and a second substrate 20 capable of generating a relative motion with respect to the first substrate 10, and in the embodiment of the present disclosure, the first substrate 10 may be moved, and the second substrate 20 is fixed. In other embodiments, the first substrate 10 may be fixed for the second substrate 20 to move.

Wherein the locking mechanism is used to keep the first substrate 10 fixed. Specifically, the locking mechanism includes an accommodating groove 31 formed on one of the first base 10 and the second base 20, and a catching protrusion 32 movably disposed on the other of the first base 10 and the second base 20, the catching protrusion 32 being configured to be disengaged from the accommodating groove 31 when the optical actuator is turned on to release the optical actuator so that the first base 10 and the second base 20 can move relatively, and to be caught in the accommodating groove 31 when the optical actuator is turned off to keep the first base 10 and the second base 20 relatively fixed. The movement of the locking protrusion 32 can make the locking protrusion 32 inserted into the receiving groove 31 or separated from the receiving groove 31 without affecting the movement of the first base 10. Referring to fig. 1, the jamming protrusions 32 may be disposed under the first base 10 when the first base 10 moves in the left-right direction of the drawing or the direction perpendicular to the paper surface, and may be disposed on the side of the first base 10 when the first base 10 moves in the up-down direction of the drawing.

Through the technical scheme, when the actuator is not used, the locking mechanism can realize the power-off maintenance of the first base body 10 in a mode of matching the accommodating groove 31 and the clamping protrusion 32; and the snap protrusions 32 are disengaged from the receiving grooves 31 to allow the first substrate 10 to move when the actuator is used. Through setting up this kind of locking mechanism, can avoid rocking or striking and produce abnormal sound, influence user experience that the actuator produced under the condition of not using, also can guarantee the performance and the life of actuator.

Referring to fig. 3 to 5, at least one of the receiving groove 31 and the catching protrusion 32 may be configured with an inclined guide surface 33 for guiding the catching protrusion 32 to be caught in the receiving groove 31. Through the mode that sets up the spigot surface 33 of slope, contact when can making protruding 32 of card and holding tank 31 cooperation is more stable, if can avoid protruding 32 of card to stretch into holding tank 31 in the back and holding tank 31 between have the gap and produce and rock, lead to keeping the effect relatively poor. As shown in fig. 3 and 4, the guide surface 33 may be formed on the catching protrusion 32, in fig. 5, the guide surface 33 may be formed on the catching protrusion 32 and the receiving groove 31, and in other embodiments, the guide surface 33 may be formed only on the receiving groove 31.

In particular, the guide surfaces 33 may comprise conical surfaces or spherical surfaces, in fig. 3 and 5 the guide surfaces 33 may be configured as conical surfaces, in fig. 5 the guide surfaces 33 may be configured as spherical surfaces, wherein it should be mentioned that, in order to ensure a locking to the receiving groove 31 in a suitable position of these guide surfaces 33, the outer contour of at least the largest dimension of the conical surfaces and the spherical surfaces may be arranged larger than the inner contour of the receiving groove 31, so that the locking projections 32 can be locked in the receiving groove 31.

As shown in fig. 5, the locking structure includes a driving portion 34 disposed on the first base 10 or the second base 20 and a holding portion 35 capable of being driven by the driving portion 34, the engaging protrusion 32 is disposed on the holding portion 35, and the driving portion 34 is configured to drive the holding portion 35 to drive the engaging protrusion 32 to extend into or withdraw from the receiving groove 31. In fig. 5, when the actuator is operated, the driving portion 34 drives the holding portion 35 to drive the snap projection 32 to deflect away from the first substrate 10, as shown by the dotted line in fig. 5; when the actuator stops, the locking protrusion 32 is locked in the receiving groove 31 of the first base 10 as shown by the solid line. It will be appreciated that the retaining portion 35 may be of a resilient construction, such that it is capable of deforming and deflecting, and of being resiliently pre-stressed on the first substrate 10.

In one embodiment, the driving portion 34 is made of a shape memory alloy, and the holding portion 35 is connected to the driving portion 34. The driving portion 34 can drive the holding portion 35 to deflect away from the receiving groove 31 when receiving a high temperature, and can drive the holding portion 35 to return to a position where the locking protrusion 32 is locked in the receiving groove 31 in a low temperature state. Here, the power supply may be connected to the driving unit 34, and the driving unit 34 may be energized to increase the temperature thereof when the actuator is operated, and the driving unit 34 may be deenergized to decrease the temperature thereof when the actuator is stopped.

Specifically, referring to fig. 7, the driving portion 34 may be made of a shape memory alloy having a two-way memory effect, when the driving portion 34 is powered on, the driving portion 34 drives the holding portion 35 to deflect away from the first base 10, and when the driving portion 34 is powered off, the driving portion 34 drives the holding portion 35 to deflect close to the first base 10.

In other embodiments, referring to fig. 18, the driving portion 34 may be made of a shape memory alloy having a one-way memory effect, in this embodiment, a side of the driving portion 34 away from the first substrate 10 may be provided with an elastic structure 40, the elastic structure 40 may be, for example, an elastic sheet, the shape of which may match the shape of the driving portion 34 and the holding portion 35, and when the driving portion 34 is configured as a U-shaped structure as described below, the elastic structure 40 may also be configured as a U-shape. When the driving portion 34 is powered on, the driving portion 34 can drive the holding portion 35 to press against the elastic structure 40 to deflect towards the side away from the first substrate 10, and at this time, the elastic structure 40 also deflects therewith; when the driving portion 34 is de-energized, the driving portion 34 has only one-way memory effect, so that the driving portion 34 and the holding portion 35 can be returned to the positions close to the first base 10 by the elastic action of the elastic structure 40. The shape memory alloy with one-way memory effect has low cost, and can achieve the effect of releasing and keeping the first substrate 10, effectively reduce the material cost and improve the economy of the locking mechanism by matching with the elastic structure 40 with elasticity.

When the driving portion 34 is made of a shape memory alloy, the driving portion 34 may be a Shape Memory Alloy (SMA) wire connected to one end of the holding portion 35, and referring to fig. 10 and 11, the holding portion 35 may be two so as to sandwich the first substrate 10. Alternatively, the number of the holding portions 35 may be different, and for example, as shown in fig. 12 and 13, the holding portions may be held only on one side of the first base body 10, or may be four and arranged in the circumferential direction of the first base body 10. In one embodiment, referring to fig. 10 to 13, a first end of the holding portion 35 is disposed at a side of the first base 10 for clamping the first base 10, a second end of the holding portion 35 opposite to the first end is connected with the SMA wire, and a region of the holding portion 35 between the first end and the second end is rotatably mounted on the second base 20 to move the first end and the second end in opposite directions. In this way, the holding portion 35 forms a lever structure through the pivot point mounted on the second base body 20, i.e. when the SMA wire contracts or stretches at the second end, the first end is correspondingly moved. Referring to fig. 9, when the SMA wire is disposed on the side of the second end far from the first substrate 10 (i.e., the left side in the drawing), the SMA wire may be made into a stretched high-temperature phase shape after being energized, the second end may be made to deflect toward the side close to the first substrate 10 (i.e., the right side in the drawing), and the first end may be far from the first substrate 10, so as to release the first substrate 10, and the SMA wire may be made into a contracted low-temperature phase shape after being de-energized, so that the first end may be returned to clamp the first substrate 10; similarly, referring to fig. 11, fig. 11 is a schematic movement diagram of a locking mechanism according to another embodiment provided by the present disclosure, and the right side is a state of the locking mechanism after being powered on, and when the SMA wire is disposed on a side of the second end close to the first substrate 10, the SMA wire may be in a contracted high-temperature phase shape after being powered on, so that the first end is away from the first substrate 10 while the second end deflects to the side close to the first substrate 10, and similarly, the SMA wire returns in the opposite direction, which is not described herein again.

In the embodiment shown in fig. 11, when the SMA wire is disposed at the side of the second end close to the first substrate 10 as described above, the second ends of the two holding portions 35 may be connected by the SMA wire when the SMA wire has a high-temperature phase shape that contracts at a high temperature and a low-temperature phase shape that stretches at a low temperature, as described above. The two holding portions 35 can be controlled simultaneously by the same SMA wire, so that the control procedure is simplified, the two holding portions 35 can operate in unison, and the holding of the first substrate 10 by the holding portions 35 is ensured to be more stable. The area of the holding portion 35 between the first end and the second end may be rotatably mounted on the second base 20 by a connecting plate to move the first end and the second end in opposite directions. The holding portion 35 may be made of an elastic material, such as a metal material having elasticity, so that the holding portion 35 has elasticity, thereby allowing the second end to elastically deflect with respect to the connecting plate. In other words, after the SMA wire is contracted by power supply, the second end will deflect relative to the connecting plate under the action of the SMA wire and the self elasticity of the holding portion 35, and after the SMA wire is cut off, the second end will return under the action of the elasticity, so as to drive the first end to return to hold the first substrate 10. In another embodiment, the holding portion 35 may be connected to the connecting plate via a pivot axis, so that the first and second ends can pivot about the pivot axis. In other embodiments, the connecting plate may be omitted, and a protrusion structure may be directly formed on the second base 20 to bond or thermally rivet the shaft for mounting the holding portion 35.

According to another embodiment of the present disclosure, as shown in fig. 12 and 14, a flange may be formed at the second end, the flange being bonded or heat staked to the second base 20, and the holder 35 being made of an elastic material such that the holder 35 may be elastically deflected with respect to the flange. One end of the SMA wire is connected to the first end of the holding portion 35, and the other end is fixed to the second base 20. In this case, the stretched or contracted shape of the SMA wire can be directly applied to the first end for holding the first substrate 10, so that the motion transmission thereof is more direct, and the response motion of the holding portion 35 is more rapid.

Specifically, referring to fig. 12 and 14, the SMA wire may be directly connected to the second base 20, or a mounting block may be formed on the second base 20 on a side of the holding portion 35 away from the first base 10, the SMA wire being connected to the mounting block, the SMA wire having a high-temperature phase shape that contracts at high temperatures and a low-temperature phase shape that stretches at low temperatures. Referring to fig. 13 and 15, in this case the SMA wire is in a contracted high temperature phase shape at the first end after energisation to pull the first end away from the first substrate 10 to release the first substrate 10, and in a stretched low temperature phase shape after de-energisation to return the first end to grip the first substrate 10. In addition, the mounting block may be disposed on a side of the holding portion 35 close to the first base 10, in which case the SMA wire may have a high-temperature phase shape and a low-temperature phase shape opposite to those described above, and the specific movement principle thereof has been described above, and will not be described in detail here to avoid repetition.

In another embodiment, the driving portion 34 may be made of a bimetal, the holding portion 35 is connected to the bimetal, the active layer 343 of the bimetal is disposed on a side close to the first substrate 10, the passive layer 344 of the bimetal is disposed on a side far from the first substrate 10, and when the temperature rises, the deformation of the active layer 343 is greater than that of the passive layer 344, so that the whole bimetal is bent to the passive layer 344 side. After the bimetal is electrified, the bimetal drives the holding part 35 to deflect to one side of the passive layer 344; after the bimetal is de-energized, the bimetal returns the holding portion 35 to the side of the active layer 343. When the driving portion 34 is made of a bimetal, the holding portion 35 may also be made of a bimetal, and the arrangement manner of the active layer and the passive layer of the holding portion 35 may be the same as the arrangement manner of the driving portion 34.

Referring to fig. 17, in another embodiment, the driving part 34 may include an iron core 341 and a coil 342 wound around the outer circumference of the iron core 341 to magnetically attract the holding part 35 to approach or separate from the receiving groove 31 after the coil 342 is energized. The coil 342 generates a magnetic field when energized, so that the magnetically attracted holding portion 35 deflects in a direction away from the first base 10, and after de-energized, the holding portion 35 elastically returns to a position where the first base 10 is held, where the iron core 341 and the coil 342 may also be disposed on a side of the holding portion 35 close to the first base 10, so that the holding portion 35 is away from the first base 10 in a free state, and the magnetically attracted holding portion 35 holds the first base 10 after the coil 342 is energized.

In the disclosed embodiment, referring to fig. 1, the corresponding surfaces of the first substrate 10 and the second substrate 20 may be configured as a plane, or referring to fig. 2, the corresponding surfaces of the first substrate 10 and the second substrate 20 are respectively configured as a spherical surface, in which case, the first substrate 10 may generate a swing around the center of the sphere along the track of the spherical surface.

According to the second aspect of the present disclosure, there is also provided an optical actuator, which includes the above-mentioned latch mechanism and has all the advantages of the above-mentioned latch mechanism, and the details are not repeated herein.

The number of the locking mechanisms can be two, and the two locking mechanisms can be arranged at the diagonal positions of the optical driver so as to ensure the locking stability of the optical driver. In other embodiments, the number of the locking mechanisms may also be four or other numbers, which are not limited herein.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A latch mechanism of an optical actuator including a first base (10) and a second base (20) capable of relative movement with the first base (10), characterized in that the locking means comprise a housing groove (31) formed on one of the first base body (10) and the second base body (20), and a snap projection (32) movably provided on the other of the first base body (10) and the second base body (20), the clamping convex part (32) is configured to be capable of being disengaged from the accommodating groove (31) when the optical actuator is started, so that the first base body (10) and the second base body (20) can move relatively and are clamped into the accommodating groove (31) when the optical actuator is closed, so that the first substrate (10) and the second substrate (20) are relatively fixed.

2. The locking mechanism according to claim 1, characterized in that at least one of the receiving groove (31) and the snap projection (32) is configured with an inclined guide surface (33) for guiding the snap projection (32) to snap into the receiving groove (31).

3. The locking mechanism of claim 2, wherein the guide surface (33) comprises a conical surface or a spherical surface.

4. The locking mechanism according to claim 1, characterized in that the locking structure comprises a driving portion (34) disposed on the first base (10) or the second base (20) and a holding portion (35) capable of being driven by the driving portion (34), the engaging protrusion (32) is disposed on the holding portion (35), and the driving portion (34) is configured to drive the holding portion (35) to drive the engaging protrusion (32) to extend into or withdraw from the receiving groove (31).

5. The locking mechanism according to claim 4, characterized in that the driving portion (34) is made of a shape memory alloy, and the holding portion (35) is connected to the driving portion (34).

6. Locking mechanism according to claim 4, characterized in that the drive part (34) comprises a bimetal, to which the holding part (35) is connected.

7. The lock mechanism according to claim 4, wherein the driving portion (34) includes an iron core (341) and a coil (342) wound around an outer periphery of the iron core (341) so as to magnetically attract the holding portion (35) to approach or separate from the receiving groove (31) when the coil (342) is energized.

8. The detent mechanism according to claim 1, characterized in that the corresponding surfaces of the first base body (10) and the second base body (20) are each designed as a plane or a spherical surface.

9. An optical actuator, characterized in that it comprises a locking mechanism according to any one of claims 1-8.

10. An optical actuator according to claim 9, wherein the number of the latch mechanisms is two, and two latch mechanisms are provided at diagonal corners of the optical actuator.

Images