CN212569120U - Vibrating lens support, vibrating lens, vibrating mirror and laser radar - Google Patents

Abstract

The utility model discloses a lens support shakes, lens shakes, mirror and laser radar shake belongs to laser radar technical field. The galvanometer lens support includes: the spectacle frame is used for fixing lenses; the two torsion beams are respectively arranged on two sides of the mirror frame along a first direction; one ends of the two torsion beams are respectively connected with the mirror frame, and the other ends of the two torsion beams are used as fixed ends; the outer edges of the two sides of the torsion beam are both of a curve structure and are symmetrically arranged, and the symmetry axis of the torsion beam is parallel to the first direction. The utility model provides a when the lens support that shakes can realize the great angular rotation of lens, guaranteed the evenly distributed of stress on the torsion beam, and then avoided the mirror that shakes because stress concentration takes place to damage, improved the life of the mirror that shakes.

Description

Vibrating lens support, vibrating lens, vibrating mirror and laser radar

Technical Field

The utility model relates to a laser radar technical field especially relates to a lens support shakes, shakes lens, mirror and laser radar shake.

Background

The galvanometer is an optical scanning element in the solid-state laser radar, and realizes horizontal scanning or vertical scanning of a laser beam through the change of the angle of a lens. The conventional galvanometer is an electromagnetic galvanometer, and a magnet generates a magnetic field, and a coil in the magnetic field generates corresponding electromagnetic force, so that the lens is driven to rotate around the torsion beam. However, the rigidity of the existing torsion beam is high, and the rotation angle of the lens is small; in order to obtain a larger rotation angle, a linear torsion beam with a longer length and a smaller cross-sectional area is often used, but the rigidity of the torsion beam is often reduced, and the stress distribution on the torsion beam is uneven under an external vibration environment, so that stress concentration is generated, the torsion beam is easy to exceed the stress limit of a material, the damage of the galvanometer is caused, and the service life of the galvanometer is shortened.

Therefore, it is desirable to provide a galvanometer lens holder, a galvanometer lens, a galvanometer and a laser radar to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lens support shakes, the lens shakes, mirror and laser radar shake, when can realizing the great angular rotation of lens, guarantee the evenly distributed of stress on the torsion beam, and then avoid the mirror that shakes because stress concentration takes place to damage, improved the life of the mirror that shakes.

In order to realize the purpose, the following technical scheme is provided:

a galvanometer lens holder, comprising:

the spectacle frame is used for fixing lenses;

the two torsion beams are respectively arranged on two sides of the mirror frame along a first direction; one ends of the two torsion beams are respectively connected with the mirror frame, and the other ends of the two torsion beams are used as fixed ends;

the outer edges of the two sides of the torsion beam are both of a curve structure and are symmetrically arranged, and the symmetry axis of the torsion beam is parallel to the first direction.

As a preferable mode of the above-mentioned lens frame, the frame has a hollow structure; and/or

The torsion beam and the mirror frame are in smooth transition.

As a preferable mode of the above-mentioned galvanometer lens holder, the axis of symmetry passes through the center of the frame; and/or

The mirror frame and the torsion beam are integrally formed.

As a preferable mode of the above-mentioned galvanometer lens holder, the galvanometer lens holder further includes a fixing portion; the fixed part is connected with the fixed end of the torsion beam; the fixing part is used for fixing the vibration lens bracket; and the outer edge of the torsion beam and the outer edge of the fixing part are in smooth transition.

As a preferable mode of the above-mentioned galvanometer lens bracket, the width of the torsion beam is gradually reduced along a direction away from the spectacle frame; or

The width of the torsion beam is gradually reduced along the direction far away from the spectacle frame and gradually increased at the fixed end.

As a preferable mode of the above galvanometer lens holder, a ratio of the minimum width of the torsion beam to the thickness of the torsion beam is equal to or greater than 6.

As a preferable mode of the above-mentioned lens holder, one end of the torsion beam near the frame is provided with a lightening hole.

A vibrating lens comprises the vibrating lens support and a lens, wherein the lens is fixed on a lens frame.

A galvanometer, comprising:

fixing a bracket;

the vibrating lens is the vibrating lens; the vibrating lens is fixed on the fixed support;

the coil is fixed on one surface of the spectacle frame, which is opposite to the lenses; and

the magnet pairs are fixed on the fixed support and symmetrically arranged on two sides of the mirror frame along a second direction, and the first direction is intersected with the second direction; and

the driving device is used for driving the coil to work so as to control the vibrating lens to deflect around the rotating shaft; the rotation axis coincides with a symmetry axis of the torsion beam.

A lidar comprising:

the laser emitting assembly is used for emitting a laser beam;

the optical scanning component is arranged on the light path of the laser beam; the optical scanning assembly comprises the galvanometer, and a lens of the galvanometer is used for changing the direction of the projected laser beam and emitting the laser beam outwards.

The utility model has the advantages that:

the utility model provides a vibrating lens support's torsion beam's both sides outward flange is the curve structure, and the symmetry sets up, when can realizing the great angular rotation of lens, has guaranteed the evenly distributed of stress on the torsion beam, and then has avoided vibrating the mirror because stress concentration takes place to damage, has improved vibrating the life of mirror.

Drawings

Fig. 1 is a schematic structural view of a vibration mirror plate according to an embodiment of the present invention;

fig. 2 is an exploded view of a vibrating lens according to an embodiment of the present invention;

fig. 3 is a front view of a vibrating lens according to an embodiment of the present invention;

fig. 4 is a rear view of a vibrating lens piece according to an embodiment of the present invention.

Reference numerals:

100-vibrating lens;

10-a spectacle frame; 20-torsion beam; 30-a fixed part; 40-a coil; 50-a lens; 60-first chamfering;

21-lightening holes; 31-a fixed body; 32-mounting holes; 211-second chamfer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-2, the present embodiment provides a galvanometer lens bracket, which is used in a galvanometer of a laser radar, and specifically includes:

a frame 10, the frame 10 being used for fixing the lens 50;

the torsion beams 20 comprise two torsion beams 20, and the two torsion beams 20 are respectively arranged on two sides of the spectacle frame 10 along a first direction; one end of each of the two torsion beams 20 is connected to the frame 10, and the other end is used as a fixed end;

the outer edges of the two sides of the torsion beam 20 are in a curved structure and are symmetrically arranged, and the symmetry axis of the torsion beam 20 is parallel to the first direction.

In the present embodiment, the first direction is a longitudinal direction of the torsion beam 20. The torsion beam 20 has an axisymmetric structure, and the symmetry axis of the torsion beam 20 is parallel to the first direction and passes through the center of the eyeglass frame 10. Alternatively, the frame 10 is circular in configuration, and the axis of symmetry of the torsion beam 20 passes through the center of the frame 10. Further, the torsion beam 20 and the frame 10 are smoothly transitioned, so that the stress concentration at the connection part of the two is avoided. Still further, referring to fig. 2, in order to achieve a smooth transition between the torsion beam 20 and the frame 10, the outer edge of the torsion beam 20 is tangent to the outer edge of the frame 10 at the junction with the frame 10.

The both sides outward flange of the torsion beam 20 of the lens support that shakes that this embodiment provided is the curve structure, and the symmetry sets up, when can realizing the great angle rotation of lens 50, has guaranteed the evenly distributed of stress on the torsion beam 20, and then avoids the mirror that shakes because stress concentration takes place to damage, has improved the life of the mirror that shakes. Meanwhile, after the vibrating lens support is adopted, the rotation angle of the lens 50 is increased, the scanning frequency of the lens 50 can be improved, and the scanning angle resolution of the laser radar is improved.

In one embodiment, the frame 10 is hollow, so that the weight of the entire frame can be reduced, which is beneficial to increase the scanning frequency of the galvanometer lens 100. The shape of the frame 10 may be set according to the shape of the lens 50, or may be independently set. In the present embodiment, the shape of the frame 10 is similar to the outer periphery of the lens 50. Taking fig. 1 and 2 as an example, in the drawings, the lens 50 is circular, and the corresponding frame 10 is a circular ring structure. In other embodiments, the frame 10 may be a solid structure, in which case the lens 50 may be directly secured to one side surface thereof.

In one embodiment, the lenses 50 may be secured to the frame 10 by adhesive or the like.

In one embodiment, the outer edges of the torsion beam 20 are curved with the center point away from the center of the frame 10 and smoothly transition with the frame 10. The curved structures at the outer edges of the two sides of the torsion beam 20 can be matched with the stress distribution on the whole torsion beam 20, so that the stress distribution on the beam is uniform, the problem that the torsion beam 20 is damaged due to stress concentration is not easy to occur, the service life of the whole torsion beam 20 is further prolonged, the service life of the galvanometer is prolonged, and the stability is good. Meanwhile, the torsion beam 20 with the curved outer edges at two sides can ensure that the whole lens 50 has a larger deflection angle, and the maximum deflection angle can reach 25 degrees, even more than 30 degrees.

Further, the galvanometer lens bracket further comprises a fixing part 30, the fixing part 30 is connected with the fixing end of the torsion beam 20, and the fixing part 30 is used for fixing the galvanometer lens bracket to the fixing bracket of the galvanometer lens. The structure of the fixing portion 30 may be designed according to the fixing manner of the fixing bracket. For example, when the fixing portion is fixed using a fastener, the fixing portion 30 is provided with a corresponding through hole for the fastener to pass through. The outer edge of the torsion beam 20 and the outer edge of the fixing part 30 are also in smooth transition; referring to fig. 3 and 4, in order to achieve a smooth transition between the outer edge of the torsion beam 20 and the outer edge of the fixing portion 30, a first chamfer 60 is disposed between the torsion beam 20 and the fixing portion 30, which effectively prevents stress concentration from occurring therein.

The width of the torsion beam 20 is gradually reduced in a direction away from the rim 10; the width of the torsion beam 20 refers to a distance between both side outer edges in a direction perpendicular to the symmetry axis of the torsion beam 20. By adopting the design, the structure of the torsion beam 20 can be simplified, and the phenomenon of stress concentration caused by sudden change of the size and the shape of the torsion beam 20 due to complex structure is avoided; the gradual reduction of the width dimension allows the torsion beam 20 to extend smoothly, and simultaneously reduces the weight and the size of the torsion beam 20 as much as possible, which is beneficial to increase the deflection frequency of the lens 50 under the condition of ensuring that the rigidity meets the requirement.

In another embodiment, the width of the torsion beam 20 is gradually decreased in a direction away from the rim 10 and gradually increased at the fixed end of the torsion beam 20, that is, the width of the entire torsion beam 20 is decreased and then increased in a direction away from the rim 10. This can balance the stress distribution on the torsion beam 20, and also prevent the joint between the fixed end of the torsion beam 20 and the fixing portion 30 from being too narrow, and thus the joint is broken due to stress concentration.

Alternatively, the ratio of the minimum width of the torsion beam 20 to the thickness of the torsion beam 20 is equal to or greater than 6, so that the rigidity and the stress concentration of the torsion beam 20 are optimally balanced.

In one embodiment, a lightening hole 21 is formed at one end of the torsion beam 20 close to the eyeglass frame 10; the lightening holes 21 are formed to reduce the weight of the whole vibrating lens support, so that the deflection frequency of the vibrating lens can be improved. In addition, the design of the lightening holes 21 also contributes to achieving an even distribution of stress throughout the length of the torsion beam 20. In one embodiment, the lightening holes 21 are obtained by making holes in the galvanometer lens holder. Alternatively, in some other embodiments, the torsion beam 20 may have a Y-shaped structure, so that the lightening holes 21 are formed naturally when the torsion beam 20 is connected to the eyeglass frame 10. The shape of the lightening holes 21 may be set as desired.

Optionally, the lightening holes 21 are triangular structures, and the vertices of the triangular structures are provided with second chamfers 211 to prevent stress concentration at the vertices of the triangles. Further optionally, the triangular structure is an isosceles triangle, a central axis of the isosceles triangle coincides with a symmetric axis of the torsion beam 20, and two waists of the isosceles triangle are similar to the outer edges of the corresponding sides of the torsion beam 20, that is, the curvature of the waists is the same as the curvature of the outer edges of the torsion beam 20; when the mirror frame 10 is a circular structure, the shape of the bottom side of the isosceles triangle is similar to the shape of the outer edge of the mirror frame 10, that is, the bottom side is an arc structure, and the center of the arc structure coincides with the center of the mirror frame 10. As a further alternative, the base of the isosceles triangle coincides with the outer edge of the frame 10.

With continued reference to fig. 2, the frame 10, the fixing portion 30 and the torsion beam 20 of the spectacle frame are integrally formed into an integral structure; in order to ensure sufficient rigidity, the spectacle frame 10, the fixing portion 30 and the torsion beam 20 may be made of metal or alloy material, wherein the material with high elastic modulus, tensile strength and material density and good comprehensive performance, such as copper-manganese alloy, is optionally adopted, so that the stress limit of the torsion beam 20 is significantly enhanced, and the service life of the galvanometer is further ensured.

Referring to fig. 2, the fixing portion 30 includes a fixing body 31 and a mounting hole 32 disposed on the fixing body 31, and a fastener passes through the mounting hole 32 and is locked on the fixing bracket, so as to mount the lens holder. In this embodiment, two mounting holes 32 are optionally provided, and the two mounting holes 32 are symmetrically arranged about the symmetry axis of the torsion beam 20, so that the fixing portion 30 can be uniformly stressed, and has good stability and fixation firmness.

The present embodiment further provides a spectacle lens 100, which includes the above-mentioned spectacle lens holder, and further includes a lens 50, wherein the lens 50 is fixed on the frame 10. Since the galvanometer lens 100 includes the galvanometer lens support, the beneficial effects of the galvanometer lens support are naturally achieved, and are not described in detail herein.

The present embodiment further provides a galvanometer, including:

fixing a bracket;

the vibration lens 100, the vibration lens 100 is fixed on the fixing bracket;

a coil 40 fixed to a surface of the frame 10 facing the lens 50; and

the magnet pairs are fixed on the fixed support and symmetrically arranged on two sides of the mirror frame 10 along a second direction, and the first direction is intersected with the second direction; and

the driving device is used for driving the coil 40 to work so as to control the vibrating lens 100 to deflect around the rotating shaft; the rotation axis coincides with the symmetry axis of the torsion beam 20.

Specifically, the magnet pair is used to provide a steady magnetic field, and the drive device is used to control the energization of the coil 40. The coil 40 is located in the magnetic field formed by the pair of magnets, so that when powered, a corresponding electromagnetic force is generated to drive the galvanometer plate 100 to deflect.

The galvanometer provided by the embodiment includes the galvanometer plate 100, so that the galvanometer plate 100 naturally has the beneficial effects, and the details are not repeated herein. The maximum rotation angle that can be realized by the lens 50 of the embodiment is between 25 degrees and 30 degrees, which fully meets the use requirement. Further, the coil 40 is of a circular ring structure, the lens 50 is of a circular structure, and the outer diameters of the coil 40 and the lens 50 are the same as the outer diameter of the frame 10, so that the coil 40 is subjected to electromagnetic force generated by a magnetic field after being electrified to generate torque as large as possible, and the vibrating lens 100 is driven to deflect.

In one embodiment, the first direction intersects the second direction perpendicularly. For example, if the first direction is a horizontal direction, the second direction is a vertical direction, or if the first direction is a vertical direction, the second direction is a horizontal direction.

The embodiment also provides a laser radar, including:

the laser emitting assembly is used for emitting a laser beam;

the optical scanning component is arranged on a light path of the laser beam; the optical scanning assembly includes the galvanometer mirror, and the mirror 50 of the galvanometer mirror is used for changing the direction of the projected laser beam and emitting the laser beam outwards.

Since the laser radar includes the vibrating mirror, corresponding technical effects are necessarily achieved, and detailed description is omitted here.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A galvanometer lens holder, comprising:

a frame (10), wherein the frame (10) is used for fixing a lens (50);

the torsion beams (20) comprise two torsion beams, and the two torsion beams (20) are respectively arranged on two sides of the spectacle frame (10) along a first direction; one ends of the two torsion beams (20) are respectively connected with the spectacle frame (10), and the other ends are used as fixed ends;

the outer edges of two sides of the torsion beam (20) are both of a curve structure and are symmetrically arranged, and the symmetry axis of the torsion beam (20) is parallel to the first direction.

2. The spectacle frame support according to claim 1, characterized in that the frame (10) is of hollow construction; and/or

The torsion beam (20) and the mirror frame (10) are in smooth transition.

3. The spectacle frame as claimed in claim 1, characterized in that the axis of symmetry passes through the center of the frame (10); and/or

The spectacle frame (10) and the torsion beam (20) are integrally formed.

4. The galvanometer lens holder of claim 1, further comprising a securing portion (30); the fixing part (30) is connected with the fixing end of the torsion beam (20); the fixing part (30) is used for fixing the vibration lens bracket; the outer edge of the torsion beam (20) and the outer edge of the fixing part (30) are in smooth transition.

5. The spectacle frame according to claim 1, wherein the width of the torsion beam (20) is gradually reduced in a direction away from the rim (10); or

The width of the torsion beam (20) is gradually reduced along the direction far away from the lens frame (10) and gradually increased at the fixed end.

6. The spectacle frame according to claim 5, wherein the ratio of the smallest width of the torsion beam (20) to the thickness of the torsion beam (20) is equal to or greater than 6.

7. The spectacle frame according to claim 1, characterized in that the torsion beam (20) is provided with a lightening hole (21) at its end close to the rim (10).

8. A spectacle rim (10), characterized in that it comprises a spectacle frame (50) according to any one of claims 1 to 7 and a lens (50), said lens (50) being fixed to said rim.

9. A galvanometer, comprising:

fixing a bracket;

a galvanometer plate according to claim 8; the vibrating lens is fixed on the fixed support;

a coil (40) fixed to a surface of the frame (10) opposite to the lens (50); and

the magnet pairs are fixed on the fixed support and symmetrically arranged on two sides of the mirror frame (10) along a second direction, and the first direction is intersected with the second direction; and

the driving device is used for driving the coil (40) to work so as to control the deflection of the galvanometer block around a rotating shaft; the axis of rotation coincides with the axis of symmetry of the torsion beam (20).

10. A lidar, comprising:

the laser emitting assembly is used for emitting a laser beam;

the optical scanning component is arranged on the light path of the laser beam; the optical scanning assembly comprises a galvanometer according to claim 9, the mirror (50) of the galvanometer being adapted to redirect and project the projected laser beam outwardly.

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