CN218158569U - Galvanometer and projector - Google Patents

Abstract

The present disclosure relates to a galvanometer and a projector, the galvanometer including a base, a mount, an optical device, and a drive assembly. The base includes a support portion. The installed part includes main part, first elastic arm and connecting portion, connecting portion set up on the supporting part and with the main part between form the clearance, the one end of first elastic arm is connected to one side of main part, the other end of first elastic arm is connected to one side that connecting portion deviate from the main part. The optical device is mounted on the body. The driving component is connected with the main body and is used for driving the main body to drive the optical device to deflect. The optical device of the vibrating mirror has a good vibration effect.

Description

Galvanometer and projector

Technical Field

The present disclosure relates to the field of laser projection technology, and more particularly to a galvanometer and a projector including the galvanometer.

Background

Currently, in order to improve the image resolution of a projection apparatus, a galvanometer is provided in the projection apparatus. The vibrating mirror is a projective element and is arranged between an optical-mechanical component and a lens of the projection device, and light beams reflected by the optical-mechanical component firstly pass through the vibrating mirror and then enter the lens. Because the vibrating mirror vibrates, the light beams can be displaced integrally, and pictures overlapped with each other are generated, so that the definition of the pictures is improved. The galvanometer is generally driven by matching a voice coil motor and a metal reed. However, the amplitude of the vibrating mirror is generally small, the vibration effect is poor, and the practical use requirement is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The present disclosure discloses a galvanometer and a projector, which can produce better vibration effect.

In a first aspect, the present disclosure is directed to a galvanometer including a base, a mount, optics, and a drive assembly. The base includes a support portion. The installed part includes main part, first elastic arm and connecting portion, connecting portion set up on the supporting part and with the main part between form the clearance, the one end of first elastic arm is connected to one side of main part, the other end of first elastic arm is connected to one side that connecting portion deviate from the main part. The optical device is mounted on the body. The driving component is connected with the main body and used for driving the main body to drive the optical device to deflect.

In some embodiments, the mounting member further comprises a second elastic arm, the second elastic arm and the first elastic arm are arranged on two adjacent sides of the main body and connected with each other, the first elastic arm, the second elastic arm and the main body surround to form an opening, and the connecting portion is located in the opening and connected with the connecting portion of the first elastic arm and the second elastic arm.

In some embodiments, the connecting portion includes a fixing portion and a joining portion, the fixing portion is connected to the supporting portion, and the joining portion extends from a side of the fixing portion away from the main body to a connection portion of the first elastic arm and the second elastic arm.

In some embodiments, the base further comprises a substrate, the support portion being disposed on the substrate; the driving assembly comprises a magnet and a conductor which are oppositely arranged, one of the magnet and the conductor is arranged on the main body, and the other of the magnet and the conductor is arranged on the substrate.

In some embodiments, the magnet is disposed on the body and the N pole and the S pole of the magnet are arranged along the incident direction of the light, and the conductor is disposed on the substrate and includes two straight segments with opposite current directions and extending along a first direction, which is perpendicular to the incident direction of the light.

In some embodiments, the conductor includes two straight line segments having opposite current directions and extending in a first direction, the magnet includes a first magnet and a second magnet arranged in a second direction and having opposite magnetic poles, the second direction, the first direction and the light incidence direction are perpendicular to each other, N poles and S poles of the first magnet and the second magnet are arranged in the second direction, and the first magnet and the second magnet are located on both sides of the conductor.

In some embodiments, the conductor is disposed on the substrate and the magnet is disposed on the body.

In some embodiments, the mounting member further comprises a first mounting portion disposed on the body, the first mounting portion being located between the two linear segments and opposite the first magnet and the second magnet, the mounting member being made of a magnetically permeable material.

In some embodiments, the conductor is disposed on the body and the magnet is disposed on the substrate.

In some embodiments, the magnet is disposed on the substrate through a bracket, the bracket including a first support plate positioned between the two linear segments and opposing the first magnet and the second magnet, the bracket being made of a magnetically permeable material.

In some embodiments, the conductors are embedded in the substrate.

In a second aspect, the present disclosure also relates to a projector including a galvanometer as in any of the above embodiments.

This mirror and projecting apparatus shake, first elastic arm are connected to the one side that deviates from the main part with the connecting portion that the base is connected, are about to first elastic arm setting in the outside of connecting portion (the one side that deviates from the main part), have increased the arm of force for under the same magnetic field condition, can increase the power of exerting in the main part, thereby make the optical device who sets up in the main part obtain better vibration effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic perspective view of a galvanometer in a first embodiment provided by the present disclosure;

FIG. 2 is an exploded view of the galvanometer shown in FIG. 1;

FIG. 3 is a partial top view of the galvanometer shown in FIG. 1;

FIG. 4 is a cross-sectional view of the galvanometer of FIG. 1 taken along IV-IV;

fig. 5 is a schematic perspective view of a galvanometer in a second embodiment provided by the present disclosure;

FIG. 6 is a cross-sectional view of the galvanometer of FIG. 5 taken along VI-VI;

fig. 7 is a partial illustration of a galvanometer in a third embodiment provided by the present disclosure.

Description of the reference numerals:

galvanometer 100

Optical device 110

Base 10

Mounting member 20

Drive assembly 30

Substrate 11

Support part 12

Main body 21

First resilient arm 22

Connecting part 23

Fixing part 231

The engagement portion 232

Second resilient arm 24

Opening 25

First light transmission part 211

Second light transmission section 111

Magnet 31

Conductor 32

First magnet 311

Second magnet 312

Second mounting part 27

First mounting portion 26

Open slot 112

Support 40

Connecting plate 41

Second support plate 42

First support plate 43

Detailed Description

Technical solutions in embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence of the functions performed by the devices, modules or units.

Referring to fig. 1 to 3, a first embodiment of the present disclosure provides a galvanometer 100 for deflecting an optical device 110 mounted thereon. The optical device 110 may be a prism, lens, mirror, panel, or the like. In this embodiment, the optical device 110 is a lens. The galvanometer 100 includes a base 10, a mount 20, and a drive assembly 30. The mount 20 is provided on the base 10 and serves to carry the optical device 110. The mount 20 and the base 10 are arranged along the light incident direction Z. In the present disclosure, the light incident direction Z is perpendicular to the surface of the optical device 110. The driving assembly 30 is used for driving the mounting member 20 to rotate around the first direction X and/or the second direction Y to deflect the optical device 110. In the present disclosure, the first direction X, the second direction Y, and the light incident direction Z are perpendicular to each other.

The base 10 serves to support the mount 20 and the driving assembly 30. The susceptor 10 includes a substrate 11 and a plurality of support portions 12 provided on the substrate 11. The base plate 11 may be a metal plate, a ceramic plate, a glass plate, a plastic plate, or the like, for providing support to the mount 20. In this embodiment, the substrate 11 is a circuit board. The circuit board is directly used as a support plate of the mounting member 20, so that the whole structure can be simplified and the cost can be reduced.

The mount 20 includes a main body 21, a plurality of first elastic arms 22, and a plurality of connecting portions 23. The main body 21 is used for carrying the optical device 110 and can be driven by the driving assembly 30 to rotate around a first direction X or a second direction Y. A plurality of first resilient arms 22 are arranged on opposite sides of the main body 21, and each first resilient arm 22 connects the main body 21 and a respective connecting portion 23. The first elastic arm 22 can be elastically deformed in the light incident direction Z, so that the main body 21 can be rotated (deflected) and reset. The plurality of connecting portions 23 are connected to the plurality of support portions 12 by means of gluing, screwing, or the like. In this embodiment, the support portion 12 is a stud screwed to the connection portion 23. A gap is formed between each connecting portion 23 and the main body 21, and one end of each first elastic arm 22, which is far away from the main body 21, is connected to one side of the corresponding connecting portion 23, which is far away from the main body 21, so that the first elastic arm 22 can have a longer length, that is, the length of the force arm is increased, the distance of one side of the main body 21 moving in the light incidence direction Z under the condition of the same acting force is increased, and the larger deflection amplitude and the better vibration effect are favorably obtained.

In some embodiments, the mount 20 further includes a plurality of second resilient arms 24. A plurality of second resilient arms 24 are arranged on opposite sides of the body 21, and the second resilient arms 24 and the first resilient arms 22 are located on different sides of the body 21. Each second elastic arm 24 connects the main body 21 and the corresponding first elastic arm 22, the connected first elastic arm 22 and second elastic arm 24 are respectively located at two adjacent sides of the main body 21 and surround the main body 21 to form an opening 25, and each connecting portion 23 is located in the corresponding opening 25 and connected with the connecting position of the first elastic arm 22 and the second elastic arm 24. The second elastic arm 24 is elastically deformable in the light incident direction Z. Through setting up the second elastic arm 24 that is located the different sides relative first elastic arm 22, and be connected connecting portion 23 and the junction of first elastic arm 22 and second elastic arm 24, can be under the unchangeable circumstances of size, make full use of space forms bigger arm of force. In this embodiment, the number of the first elastic arms 22, the connecting portions 23, the second elastic arms 24 and the supporting portions 12 is equal to and four, and the four sets of the first elastic arms 22 and the corresponding connecting portions 23, the second elastic arms 24 and the supporting portions 12 are respectively disposed at four corners of the main body 21. In other embodiments, the number of the first elastic arm 22, the connecting portion 23, the second elastic arm 24 and the supporting portion 12 may be set according to actual needs, for example, the number may be 1, 2, 3, etc., and the disclosure is not limited thereto.

In some embodiments, the connecting portion 23 includes a fixing portion 231 and a connecting portion 232, the fixing portion 231 is connected to the supporting portion 12, and the connecting portion 232 extends from a side of the fixing portion 231 facing away from the main body 21 to a connection point of the connected first elastic arm 22 and the connected second elastic arm 24 to be connected to the first elastic arm 22 and the second elastic arm 24 at the same time.

The first resilient arm 22 and the second resilient arm 24 are made of a resilient material, such as stainless steel or copper. The body 21 and the connecting portion 23 may be made of an elastic material or a non-elastic material, and the present disclosure is not limited thereto. The main body 21, the first resilient arm 22, the connecting portion 23 and the second resilient arm 24 may be formed by separate molding and then assembled to form the mounting member 20. Alternatively, the body 21, the first resilient arm 22, the connecting portion 23 and the second resilient arm 24 may be integrally formed to form the mounting member 20, such as by stamping or cutting the mounting member 20 from a single piece of sheet material. In this embodiment, the mounting member 20 is a spring.

Referring to fig. 4, in some embodiments, the main body 21 includes a first light-transmitting portion 211, the substrate 11 includes a second light-transmitting portion 111, and the first light-transmitting portion 211 and the second light-transmitting portion 111 are opposite to the optical device 110, so that light can be irradiated onto the optical device 110 through the main body 21 and the substrate 11. In this embodiment, both the first light transmission portion 211 and the second light transmission portion 111 are through holes. In other embodiments, the first and second light-transmitting portions 211 and 111 may be made of a light-transmitting material.

The drive assembly 30 is coupled to the body 21 and is configured to drive the body 21 for deflection. The drive assembly 30 may be any suitable drive mechanism, such as a rack and pinion mechanism, a ball screw mechanism, a linear motor, or the like. In this embodiment, drive assembly 30 includes oppositely disposed magnet 31 and conductor 32. One of magnet 31 and conductor 32 is provided on main body 21, and the other is provided on substrate 11. The driving unit 30 is composed of the magnet 31 and the conductor 32, and can reduce noise as much as possible in addition to stable driving. In this embodiment, the number of the driving assemblies 30 is four, and the four driving assemblies 30 are disposed corresponding to different sides of the main body 21. In other embodiments, the number of the driving assemblies 30 may be set according to actual needs, for example, the number may be 1, 2, 3, etc., and the disclosure is not limited thereto.

In some embodiments, magnet 31 is disposed on body 21 with the N-pole and S-pole of magnet 31 arranged along light incident direction Z, and conductor 32 is disposed on substrate 11 and opposite to magnet 31. The conductor 32 on one side of the body 21 comprises two straight segments 321 with opposite current directions and extending in the first direction X. Two straight segments 321 with opposite current directions are opposite to the corresponding magnet 31, and the magnetic fields applied to the two straight segments 321 with opposite current directions by the magnet 31 are opposite in direction. When the conductor 32 is energized, under the action of the magnet 31, the two straight segments 321 with opposite current directions receive the same-direction ampere force along the light incidence direction Z, and then the magnet 31 receives the same-direction reaction force along the light incidence direction Z from the two straight segments 321, so that the magnet 31 can be driven to reciprocate along the light incidence direction Z by controlling the current direction of the conductor 32, and the main body 21 moves along with the magnet 31 to realize deflection around the first direction X. In the above configuration, the two straight line segments 321 of the conductor 32 can use only the magnetic field of the magnet 31 in the second direction Y perpendicular to the light incident direction Z and the first direction X, and the magnetic field utilization rate is low, resulting in a small force applied to the magnet 31 in the light incident direction Z. The present disclosure increases the arm of force by disposing the first/second elastic arms 22/24 at the outer side (the side far from the main body 21) of the connection portion 23 fixed to the base 10, so that the force applied to the magnet 31 in the light incidence direction Z can be increased under the same magnetic field condition, thereby obtaining a better vibration effect.

Similarly, the conductor 32 on the other side of the main body 21 includes two straight segments 321 with opposite current directions and extending along the second direction Y, when the magnet 31 is powered on, under the action of the corresponding magnet 31, the two straight segments 321 with opposite current directions receive an ampere force along the light incidence direction Z and in the same direction, and then the magnet 31 receives a reaction force from the two straight segments 321 along the light incidence direction Z and in the same direction, so that the magnet 31 can be driven to reciprocate along the light incidence direction Z by controlling the current direction of the conductor 32, and the main body 21 moves along with the magnet 31 to realize deflection around the second direction Y. By providing a plurality of sets of conductors 32 extending in the first direction X and in the second direction Y, deflection about the first direction X and the second direction Y is achieved under the influence of the plurality of sets of drive assemblies 30. In other embodiments, the main body 21 can be deflected only in the first direction X or the second direction Y by providing the conductors 32 extending only in the first direction X or the second direction Y and the corresponding magnets 31.

In some embodiments, the size of the magnet 31 in the first direction X or the second direction Y may be equal to the length of the straight line segment 321 to compress the arc segment of the conductor 32 configured as a coil to the shortest, improving the utilization rate of the conductor 32.

In some embodiments, the conductor 32 is embedded in the substrate 11, which is beneficial to the miniaturization of the whole structure, and can omit the conventional coil assembly processes such as winding, welding, dispensing and fixing, and simplify the process.

Referring to fig. 5 and 6, in some embodiments, the magnet 31 on one side of the main body 21 includes a first magnet 311 and a second magnet 312 arranged along the second direction Y, N poles and S poles of the first magnet 311 and the second magnet 312 are arranged along the second direction Y, and magnetic poles of the first magnet 311 and the second magnet 312 are opposite. The mount 20 further includes two second mounting portions 27 provided on the main body 21 and arranged in the second direction Y, the two second mounting portions 27 being located on opposite sides of the conductor 32, and the first magnet 311 and the second magnet 312 being provided on the two second mounting portions 27. When the conductor 32 is energized, under the action of the first magnet 311 and the second magnet 312 with opposite magnetic pole directions, the two straight lines 321 with opposite current directions receive the Ampere force along the incident direction Z and in the same direction, and then the first magnet 311 and the second magnet 312 receive the reaction force along the incident direction Z and in the same direction, so as to drive the main body 21 to realize the deflection around the second direction Y. The magnet 31 can obtain a very high magnetic field utilization rate by using two magnets with opposite magnetic pole directions, so that the main body 21 obtains a larger reaction force under the condition of the same current magnitude, and the vibration effect is better.

Similarly, the magnet 31 positioned at the other side of the body 21 includes a first magnet 311 and a second magnet 312 arranged in the first direction X, and N poles and S poles of the first magnet 311 and the second magnet 312 are both arranged in the first direction X; the mounting member 20 further includes two second mounting portions 27 provided on the main body 21 and arranged along the first direction X, the two second mounting portions 27 being located at opposite sides of the conductor 32, the first magnet 311 and the second magnet 312 being provided at the two second mounting portions 27; when the conductor 32 is energized, under the action of the first magnet 311 and the second magnet 312 with opposite magnetic pole directions, the two straight lines 321 with opposite current directions receive the ampere force along the light incidence direction Z and the same direction, and then the first magnet 311 and the second magnet 312 receive the reaction force along the light incidence direction Z and the same direction, so as to drive the main body 21 to realize the deflection around the first direction X.

In some embodiments, mount 20 further includes a first mounting portion 26. The first mounting portion 26 is disposed on the main body 21 between the two second mounting portions 27, and the first mounting portion 26 is disposed between the two straight segments 321 opposite in current direction and opposite to the first magnet 311 and the second magnet 312. The mount 20 is made of a magnetically conductive material such as iron, cobalt, nickel, or the like. The first magnet 311 and the second magnet 312 with opposite magnetic pole directions are directly magnetically adsorbed on the two second installation parts 27, so that the first installation part 26 is magnetized to have magnetic poles corresponding to the magnetic poles of the first magnet 311 and the second magnet 312, magnetic induction lines between the first installation part 26 and the first magnet 311/the second magnet 312 are straight lines, a uniform magnetic field is formed, and the utilization rate of the magnetic field is further improved.

The main body 21, the second mounting portion 27 and the first mounting portion 26 may be formed separately or integrally. In some embodiments, the main body 21, the second mounting portion 27, and the first mounting portion 26 are integrally formed, such as by partially bending the main body 21, the second mounting portion 27, and the second mounting portion 27 from a single piece of sheet material through a stamping process.

In some embodiments, the conductor 32 is embedded in the substrate 11, and the substrate 11 is opened with a plurality of slots 112 for inserting the second mounting portion 27 and the first mounting portion 26. By providing the slot 112 and inserting the second mounting portion 27 and the first mounting portion 26 into the slot 112, miniaturization of the entire structure is facilitated.

In some embodiments, the conductor 32 is disposed on the body 21, and the first magnet 311 and the second magnet 312 are disposed on the substrate 11. For example, referring to fig. 7, the conductor 32 is fixed on the surface of the body 21 facing the substrate 11, the first magnet 311 and the second magnet 312 are disposed on the substrate 11 through the bracket 40 and arranged along the second direction Y, and the N pole and the S pole of the first magnet 311 and the second magnet 312 are both arranged along the second direction Y and located on both sides of the conductor 32. The bracket 40 includes a connection plate 41 and two second support plates 42 provided on the connection plate 41. The connection plate 41 is connected to the substrate 11. The first and second magnets 311 and 312 are disposed on the two second support plates 42 and on opposite sides of the conductor 32. When the conductor 32 is energized, under the action of the first magnet 311 and the second magnet 312 with opposite magnetic pole directions, the two straight lines 321 with opposite current directions receive the ampere force along the light incidence direction Z and the same direction, and then the first magnet 311 and the second magnet 312 receive the reaction force along the light incidence direction Z and the same direction, so as to drive the main body 21 to realize the deflection around the second direction Y. Similarly, the first magnet 311 and the second magnet 312 may also be disposed on the substrate 11 through the bracket 40 and arranged along the first direction X, and the N pole and the S pole of the first magnet 311 and the second magnet 312 are both arranged along the first direction X and located on two sides of the conductor 32, so that when the conductor 32 is energized, under the action of the first magnet 311 and the second magnet 312 with opposite magnetic pole directions, the first magnet 311 and the second magnet 312 can drive the main body 21 to deflect around the first direction X. The driving unit 30 is easily attached and detached by directly providing the conductor 32 to the main body 21 and providing the first magnet 311 and the second magnet 312 to the substrate 11 through the holder 40.

In some embodiments, the bracket 40 further includes a first support plate 43. The first support plate 43 is disposed on the connection plate 41 between the two second support plates 42. The first support plate 43 is also located between two straight segments 321 of opposite current direction and opposite the first magnet 311 and the second magnet 312. The bracket 40 is made of a magnetic conductive material, and the first support plate 43 is magnetized by the first magnet 311 and the second magnet 312 with opposite magnetic poles, so that a uniform magnetic field is formed between the first support plate 43 and the first magnet 311/the second magnet 312, and the utilization rate of the magnetic field is improved.

An embodiment of the present disclosure further provides a projector including the galvanometer 100. It is understood that the projector may further include other components such as an optical engine and a lens, and the disclosure is not limited to the details.

The above description is only an embodiment of the present disclosure, and not intended to limit the scope of the present disclosure, and all equivalent structures or equivalent processes performed by the present disclosure and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present disclosure.

Claims (12)

1. A galvanometer, comprising:

a base including a support portion;

the mounting part comprises a main body, a first elastic arm and a connecting part, wherein the connecting part is arranged on the supporting part and forms a gap with the main body, one end of the first elastic arm is connected to one side of the main body, and the other end of the first elastic arm is connected to one side, away from the main body, of the connecting part;

an optical device mounted on the body; and

and the driving component is connected with the main body and is used for driving the main body to drive the optical device to deflect.

2. The galvanometer of claim 1, wherein the mounting member further comprises a second resilient arm, the second resilient arm and the first resilient arm are disposed on adjacent sides of the body and are connected to each other, the first resilient arm, the second resilient arm and the body enclose an opening, and the connecting portion is located in the opening and is connected to a connection of the first resilient arm and the second resilient arm.

3. The galvanometer of claim 2, wherein the connecting portion includes a fixed portion connected to the support portion and a joint portion extending from a side of the fixed portion facing away from the body to a junction of the first and second resilient arms.

4. The galvanometer of claim 1, wherein the base further comprises a substrate, the support portion being disposed on the substrate; the driving assembly comprises a magnet and a conductor which are oppositely arranged, one of the magnet and the conductor is arranged on the main body, and the other of the magnet and the conductor is arranged on the substrate.

5. The galvanometer of claim 4, wherein the magnet is disposed on the body and has N and S poles arranged along a light incident direction, and the conductor is disposed on the substrate and includes two straight segments having opposite current directions and extending along a first direction perpendicular to the light incident direction.

6. The galvanometer of claim 4, wherein the conductor comprises two straight segments extending in a first direction with opposite current flow directions, the magnet comprises a first magnet and a second magnet arranged in a second direction with opposite magnetic poles, the second direction, the first direction and a light incident direction are perpendicular to each other, the N-pole and the S-pole of the first magnet and the second magnet are arranged in the second direction, and the first magnet and the second magnet are located on both sides of the conductor.

7. The galvanometer of claim 6, wherein the conductor is disposed on the substrate and the magnet is disposed on the body.

8. The galvanometer of claim 7, wherein the mounting member further comprises a first mounting portion disposed on the body, the first mounting portion being located between the two linear segments and opposite the first magnet and the second magnet, the mounting member being made of a magnetically conductive material.

9. The galvanometer of claim 6, wherein the conductor is disposed on the body and the magnet is disposed on the substrate.

10. The galvanometer of claim 9, wherein the magnet is disposed on the substrate by a bracket, the bracket comprising a first support plate positioned between the two linear segments and opposite the first magnet and the second magnet, the bracket being made of a magnetically conductive material.

11. A galvanometer according to any of claims 5 to 8, characterized in that the conductor is embedded in the substrate.

12. A projector comprising a lens and a galvanometer according to any one of claims 1-11.

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