Galvanometer

Abstract

The utility model discloses a galvanometer structure, and relates to the field of optics. Comprising a substrate; the bearing part is arranged on the base body and provided with at least one deflection axis, and the bearing part reciprocates between a deflection position and a reset position around the deflection axis relative to the base body; the optical lens is arranged on the bearing part and is driven by the bearing part to reciprocate between a deflection position and a reset position around a deflection axis; the driving assembly is used for driving the bearing part to move; and the reset assembly generates pulling force acting on the bearing part and is used for resetting the optical lens. According to the utility model, the problem caused by resetting the bearing piece only by using an elastic cantilever in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of optics, in particular to a galvanometer structure. Background Art

[0002] At present, the TSP galvanometer uses a powered coil to generate a magnetic field and interacts with a permanent magnet to achieve rapid tilting of the lens relative to the TSP bracket, thereby achieving beam scanning and pointing. In existing technologies, the vibration of the galvanometer mostly uses electromagnetic coupling, using the interaction force between the powered coil and the magnet to achieve the vibration of the spring, thereby driving the lens in the TSP galvanometer to vibrate.

[0003] A repulsive force is generated between the energized coil and the permanent magnet, which constitutes the driving force of the lens. The metal spring is fixedly connected to the lens. Under the action of the driving force, the lens is flipped in the direction of the force, and then reset under the action of the elastic force of the metal spring.

[0004] According to current design requirements, the lens in TSP needs to perform at least 60 alternating motions within 1 second. During the entire working cycle, the shrapnel is always in a low-amplitude and high-frequency vibration, and the shrapnel is reset only by the elastic deformation of the cantilever. The fatigue generated under this working condition will affect the reliability of the galvanometer. After long-term operation, it will be difficult to completely reset the lens, resulting in the inability to maintain a fixed position at the starting position of the vibration cycle. In addition, the starting position of the vibration cycle will be affected to a certain extent by the influence of small current signals. In practical applications, it is difficult to ensure that the initial position of the lens is relatively fixed. The problem of the impact of the error accumulation in the initial position on the reliability of the galvanometer has gradually become prominent. Utility Model Content

[0005] In view of this, the utility model provides a galvanometer, which can solve the above problems.

[0006] The utility model provides a galvanometer, comprising:

[0007] matrix;

[0008] A bearing member, disposed on the base body, having at least one deflection axis, wherein the bearing member reciprocates between a deflection position and a reset position relative to the base body around the deflection axis;

[0009] An optical lens is disposed on the carrier and reciprocates under the drive of the carrier;

[0010] A driving assembly, used for driving the bearing member to move;

[0011] A reset component generates a pulling force acting on the bearing member to reset the bearing member.

[0012] Preferably, the reset component includes a first reset permanent magnet and a second reset permanent magnet, the first reset permanent magnet is arranged on the carrier, the second reset permanent magnet is arranged on the base, the first reset permanent magnet and the second reset permanent magnet are arranged opposite to each other and the magnetic poles on the opposite sides are different; when the optical lens is in the reset position, the angle between the magnetization direction of the first reset permanent magnet and the second reset permanent magnet and the plane where the optical lens is located is greater than or equal to 0 degrees and less than 90 degrees.

[0013] Optionally, a first magnet mounting structure is provided on the carrier, and the first reset permanent magnet is fixed on the first magnet mounting structure; a second magnet mounting structure is provided on the base, and the second reset permanent magnet is fixed on the second magnet mounting structure.

[0014] Optionally, the supporting member is disposed on the base through a rotating shaft, and the supporting member reciprocates around the rotating shaft.

[0015] Optionally, a mounting seat is provided on the base, and the rotating shaft is connected to the mounting seat via a bearing.

[0016] Optionally, the bearing member is disposed on the base through an elastic cantilever, the elastic cantilever defines the deflection axis, and the elastic cantilever is used to provide a restoring force for the bearing member.

[0017] Preferably, the bearing member comprises:

[0018] an external structure having a first deflection axis, wherein the external structure reciprocates relative to the base body about the first deflection axis between a deflected position and a reset position;

[0019] An internal structure having a second deflection axis, the internal structure being disposed in the external structure, the internal structure reciprocating between a deflection position and a reset position relative to the external structure around the second deflection axis, and the optical lens being disposed on the internal structure;

[0020] An included angle is formed between the first deflection axis and the second deflection axis, and the first reset permanent magnet is arranged on the external structure.

[0021] Optionally, it also includes a third reset permanent magnet and a fourth reset permanent magnet, wherein the third reset permanent magnet is arranged on the internal structure, and the fourth reset permanent magnet is arranged on the external structure, and the third reset permanent magnet and the fourth reset permanent magnet are arranged opposite to each other and the magnetic poles on the opposite sides are different; when the optical lens is in the reset position, the angle between the magnetization direction of the third reset permanent magnet and the fourth reset permanent magnet and the plane where the optical lens is located is greater than or equal to 0 degrees and less than 90 degrees.

[0022] Preferably, the external structure and the internal structure are both annular closed frame structures.

[0023] Preferably, the driving component includes a first driving coil and a first driving magnet that are relatively arranged, one of the first driving coil or the first driving magnet is arranged on the base, and the other is arranged on the carrier, and the first driving coil interacts with the first driving magnet to generate a driving force when energized, thereby driving the carrier to move.

[0024] Optionally, the driving component includes a first driving coil and a first driving magnet arranged relative to each other, one of the first driving coil or the first driving magnet is arranged on the base, and the other is arranged on the external structure, and when the first driving coil is energized, it interacts with the first driving magnet to generate a driving force, thereby driving the external structure and the internal structure to move together; the driving component also includes a second driving coil and a second driving magnet arranged relative to each other, one of the second driving coil or the second driving magnet is arranged on the external structure, and the other is arranged on the internal structure, and when the second driving coil is energized, it interacts with the second driving magnet to generate a driving force, thereby driving the internal structure to move.

[0025] The utility model avoids the problem caused by the traditional optical lens relying solely on the elastic arm of the metal spring to reset, namely, the optical lens cannot be accurately in the initial position due to fatigue problems, by providing a reset component. The utility model can keep the initial position of the optical lens unchanged at the theoretical initial position, thereby increasing the service life and improving the imaging quality of the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other purposes, features and advantages of the present invention will become more apparent by describing the embodiments of the present invention in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same reference numerals generally represent the same components. Among them:

[0027] Figure 1 An exploded schematic diagram of a galvanometer provided in an embodiment of the utility model;

[0028] Figure 2 Another structural schematic diagram of a galvanometer provided in an embodiment of the utility model;

[0029] Figure 3 A side view of a galvanometer provided in an embodiment of the utility model;

[0030] Figure 4Another structural schematic diagram of a galvanometer provided in an embodiment of the utility model;

[0031] Figure 5 A top view of a galvanometer provided in an embodiment of the utility model;

[0032] Figure 6 This is a structural schematic diagram of a first embodiment of the load-bearing component of the utility model;

[0033] Figure 7 This is a structural schematic diagram of a second embodiment of the load-bearing component of the utility model;

[0034] Figure 8 The structure of the drive assembly of the utility model is shown in FIG. Figure 1 ;

[0035] Fig. 9 The structure of the drive assembly of the utility model is shown in FIG. Figure 2 ;

[0036] Fig.10 This is a schematic structural diagram of another implementation scheme of the drive assembly of the utility model. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should belong to the scope of protection of the present invention. In addition, although the disclosure in the present invention is introduced according to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete technical solution separately. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] In the embodiment of the present utility model, "at least one" refers to one or more, and "multiple" refers to two or more. The "first", "second" and similar words used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish descriptions. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The term "and / or" includes any and all combinations of one or more associated listed items. It should be understood that the terms "upper", "lower", "inner", "outer", "front", "back" and the like are only for the convenience of describing the present utility model and simplifying the description, rather than having an implied or indicative meaning, and therefore cannot be understood as a limitation on the present utility model.

[0039] In order to thoroughly understand the present invention, a detailed description will be provided below to illustrate the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0040] Figure 1 The present invention provides an exploded view of a galvanometer structure, which includes a base 1; a carrier 2, which is arranged on the base 1, and the carrier 2 has at least one deflection axis, and the carrier 2 reciprocates between a deflection position and a reset position around the deflection axis relative to the base 1; an optical lens 3, which is arranged on the carrier 2 and reciprocates between a deflection position and a reset position around a deflection axis 8 driven by the carrier 2. The carrier 2 moves under the drive of the driving assembly 4, and also includes a reset assembly 5, which generates a pulling force acting on the carrier 2 to reset the optical lens 3.

[0041] The galvanometer is arranged in the optical path of the projector. Since the optical lens 3 in the galvanometer exhibits periodic high-frequency vibration, the optical path can be changed when the light passes through the optical lens 3, causing the pixel to shift, thereby improving the resolution of the projector.

[0042] Since the reset assembly 5 is provided, the optical lens 3 can be reset by the reset assembly 5, thus avoiding the problem caused by the traditional optical lens 3 only relying on the elastic arm of the metal spring to reset, that is, the optical lens 3 cannot be accurately in the initial position. The driving assembly 4 and the reset assembly 5 can be respectively provided on both sides of the carrier 2, and no specific limitation is made here.

[0043] See also Figure 2-3, is an embodiment of the reset component 5 of the utility model, the reset component 5 includes a first reset permanent magnet 51 and a second reset permanent magnet 52, the first reset permanent magnet 51 is arranged on the carrier 2, the second reset permanent magnet 52 is arranged on the base 1, the first reset permanent magnet 51 and the second reset permanent magnet 52 are arranged opposite to each other and the magnetic poles on the opposite sides are different. The first reset permanent magnet 51 and the second reset permanent magnet 52 interact with each other, and there is a certain pulling force between the two. When the driving force of the driving component 4 decreases within the cycle, the reset component 5 acts on the optical lens 3 when the driving force is less than the pulling force between the permanent magnets, and the optical lens 3 is reset at this time. The acting force between the permanent magnets basically does not change with the use time, so that the initial position of the optical lens 3 can remain unchanged at the theoretical initial position.

[0044] Preferably, according to the force condition of the carrier 2, when the optical lens 3 is in the reset position, the angle between the magnetization direction of the first reset permanent magnet 51 and the second reset permanent magnet 52 and the plane where the optical lens 3 is located is set to be greater than or equal to 0 degrees and less than 90 degrees. The angle can be reasonably matched according to the actual force condition, so that the force reaches a balanced state when the carrier 2 is in the reset position (i.e., the initial position, when the drive component 4 is not working). In a preferred manner, the angle between the magnetization direction of the first reset permanent magnet 51 and the second reset permanent magnet 52 and the plane where the optical lens 3 is located is equal to 0 degrees, that is, the magnetization direction is parallel to the plane where the optical lens 3 is located.

[0045] Further, in order to install the first reset permanent magnet 51 and the second reset permanent magnet 52, a first magnet mounting structure 6 is provided on the carrier 2, the first reset permanent magnet 51 is fixed on the first magnet mounting structure 6, a second magnet mounting structure 7 is provided on the base 1, the second reset permanent magnet 52 is fixed on the second magnet mounting structure 7, and the first reset permanent magnet 51 and the second reset permanent magnet 52 can be fixed by bonding. The first magnet mounting structure 6 and the second magnet mounting structure 7 can be plate-like structures extending from the carrier 2 and the base 1, and can be an integrally formed structure or a split structure.

[0046] In another embodiment, the supporting member 2 can still be installed on the base 1 in a traditional manner, such as by being arranged on the base 1 through an elastic cantilever, the elastic cantilever defines a deflection axis, and the elastic cantilever is used to provide a restoring force for the supporting member 2. At this time, the supporting member 2 is reset under the joint action of the elastic cantilever and the reset assembly 5. The service life and reset accuracy of this structure are higher than those of a single elastic cantilever structure.

[0047] However, the elastic cantilever will still fatigue after being used for a period of time, causing its stiffness to change, which will change the original equilibrium position between the reset component 5 and the elastic cantilever, resulting in the inability to accurately reset the support 2. In addition, the stiffness of the elastic cantilever is not easy to control. If the stiffness is too large, there is a problem that the support 2 cannot be pushed to deflect. If the stiffness is too low, it will deform greatly under the action of a small driving force, causing the optical lens 3 to flip too much, making it impossible to accurately control the galvanometer to accurately reach the designed angle position under each flipping condition. Therefore, we propose another preferred method, see Figure 4-5 , that is, the elastic cantilever is cancelled, and the supporting member 2 is arranged on the base 1 through the rotating shaft 8. The supporting member 2 reciprocates around the rotating shaft 8. At this time, the reset driving force of the supporting member 2 only comes from the reset component 5. There are no parts that will produce fatigue in the system, and the service life is longer. The supporting member 2 can always be accurately reset, thereby improving the imaging quality of the projector.

[0048] Specifically, a mounting seat 10 is provided on the base 1 , and the rotating shaft 8 is connected to the mounting seat 10 via a bearing 9 .

[0049] Figure 6 The structure of the carrier 2 is shown, and light can pass through the carrier 2 to enter the optical lens 3. The carrier 2 is also provided with an optical lens mounting structure 21, and the optical lens 3 is connected to the carrier 2 through the optical lens mounting structure 21, and can be connected by bonding. The optical lens mounting structure 21 can be a structure extending from the carrier 2 and adapted to the optical lens 3.

[0050] Figure 7 This is another embodiment of the support member 2 of the present invention. The support member 2 includes a first deflection axis A and a second deflection axis B. The support member can deflect around the first deflection axis A and the second deflection axis B respectively.

[0051] Specifically, the carrier 2 includes: an external structure 22 having a first deflection axis A, the external structure reciprocates between a deflection position and a reset position around the first deflection axis A relative to the base 1, and the external structure 22 is connected to the base 1; an internal structure 23 having a second deflection axis B, the internal structure 23 is arranged in the external structure 22, the internal structure reciprocates between a deflection position and a reset position around the second deflection axis B relative to the external structure, and the optical lens 3 is arranged on the internal structure 23; there is an angle between the first deflection axis A and the second deflection axis B, and a first reset permanent magnet 51 is arranged on the external structure 22. The first reset permanent magnet 51 interacts with the second reset permanent magnet 52 arranged on the base 1, and there is a certain pulling force between the two, so as to achieve the reset of the external structure 22 and the internal structure 23.

[0052] The external structure 22 can be disposed on the base 1 via an elastic cantilever or a rotating shaft 8 , and the internal structure 23 can also be disposed in the external structure 22 via an elastic cantilever or a rotating shaft 8 .

[0053] It also includes a third reset permanent magnet 53 and a fourth reset permanent magnet 54. The third reset permanent magnet 53 is arranged on the internal structure 23, and the fourth reset permanent magnet 53 is arranged on the external structure 22. The third reset permanent magnet 53 and the fourth reset permanent magnet 54 are arranged opposite to each other and the magnetic poles on the opposite sides are different. When the optical lens 3 is in the reset position, the angle between the magnetization direction of the third reset permanent magnet 53 and the fourth reset permanent magnet 54 and the plane where the optical lens 3 is located is greater than or equal to 0 degrees and less than 90 degrees. The third reset permanent magnet 53 and the fourth reset permanent magnet 54 interact with each other, and there is a certain pulling force between the two, so as to achieve the reset of the internal structure 23. Preferably, the external structure and the internal structure are both annular closed frame structures.

[0054] The number of the first reset permanent magnet 51 , the second reset permanent magnet 52 , the third reset permanent magnet 53 , and the fourth reset permanent magnet 54 can be reasonably set as needed, such as setting one or more.

[0055] See also Figure 1 and Figure 8-9 The driving component 4 includes a first driving coil 42 and a first driving magnet 41. One of the first driving coil 42 or the first driving magnet 41 is arranged on the base 1, and the other is arranged on the carrier 2. When the first driving coil 42 is energized, it interacts with the first driving magnet 41 to generate a driving force, thereby driving the carrier 2 to move.

[0056] The first driving coil 42 and the first driving magnet 41 can be fixed on the base 1 or the carrier 2 through the driving coil bracket 12 or the driving magnet bracket 11. The driving coil bracket 12 and the driving magnet bracket 11 can be a plate-like structure extending from the base 1 or the carrier 2. The first driving coil 42 and the first driving magnet 41 can be fixed by bonding or the like.

[0057] The substrate 1 may be a circuit board, and the drive coil may be arranged inside the substrate 1, which may further reduce the overall size of the galvanometer and reduce the complexity of the structure. Fig.10 .

[0058] See also Figure 7The driving component 4 also includes a second driving coil 43 and a second driving magnet 44. One of the second driving coil 43 or the second driving magnet 44 is arranged on the external structure 22, and the other is arranged on the internal structure 23. After the second driving coil 43 is energized, it interacts with the second driving magnet 44 to generate a driving force, thereby driving the internal structure 23 to move, and at this time, one of the first driving coil (42) or the first driving magnet (41) is arranged on the external structure (22).

[0059] It can be understood by those skilled in the art that, when the supporting member 2 includes an external structure 22 and an internal structure 23, the first driving coil 42 and the first driving magnet 41 are required to drive the external structure 22 and the internal structure 23 to move together around the first deflection axis, the first reset permanent magnet 51 and the second reset permanent magnet 52 are required to reset the external structure 22 and the internal structure 23 together, the second driving coil 43 and the second driving magnet 44 only drive the internal structure 23 to move, and the third reset permanent magnet 53 and the fourth reset permanent magnet 54 only reset the internal structure 23.

[0060] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A galvanometer, characterized in that: include: Matrix (1); A carrier (2) is arranged on the base (1) and has at least one deflection axis, and the carrier (2) reciprocates between a deflection position and a reset position relative to the base (1) around the deflection axis; An optical lens (3) is arranged on the carrier (2) and reciprocates under the drive of the carrier (2); A driving assembly (4) for driving the bearing member (2) to move; A reset component (5), the reset component (5) generating a pulling force acting on the bearing member (2) for resetting the bearing member (2); The reset component (5) comprises a first reset permanent magnet (51) and a second reset permanent magnet (52); the first reset permanent magnet (51) is arranged on the carrier (2), and the second reset permanent magnet (52) is arranged on the base (1); the first reset permanent magnet (51) and the second reset permanent magnet (52) are arranged opposite to each other and have different magnetic poles on opposite sides.

2. A galvanometer according to claim 1, characterized in that: When the optical lens (3) is in the reset position, the angle between the magnetization directions of the first reset permanent magnet (51) and the second reset permanent magnet (52) and the plane where the optical lens (3) is located is greater than or equal to 0 degrees and less than 90 degrees.

3. A galvanometer according to claim 2, characterized in that: The carrier (2) is provided with a first magnet mounting structure (6), the first reset permanent magnet (51) is fixed on the first magnet mounting structure (6), the base (1) is provided with a second magnet mounting structure (7), and the second reset permanent magnet (52) is fixed on the second magnet mounting structure (7).

4. A galvanometer according to claim 2, characterized in that: The bearing member (2) is arranged on the base (1) via a rotating shaft (8), and the bearing member (2) reciprocates and deflects around the rotating shaft (8).

5. A galvanometer according to claim 4, characterized in that: A mounting seat (10) is provided on the base (1), and the rotating shaft (8) is connected to the mounting seat (10) via a bearing (9).

6. A galvanometer according to claim 2, characterized in that: The bearing member (2) is arranged on the base (1) via an elastic cantilever, the elastic cantilever defines the deflection axis, and the elastic cantilever is used to provide a restoring force for the bearing member (2).

7. A galvanometer according to any one of claims 2 to 6, characterized in that: The carrier (2) comprises: An external structure (22) having a first deflection axis, wherein the external structure (22) reciprocates between a deflection position and a reset position relative to the base body (1) around the first deflection axis; An internal structure (23) having a second deflection axis, the internal structure (23) being arranged in the external structure (22), the internal structure (23) reciprocatingly moving around the second deflection axis between a deflection position and a reset position relative to the external structure (22), and the optical lens (3) being arranged on the internal structure (23); An included angle is formed between the first deflection axis and the second deflection axis, and the first reset permanent magnet (51) is arranged on the external structure (22).

8. A galvanometer according to claim 7, characterized in that: It also includes a third reset permanent magnet (53) and a fourth reset permanent magnet (54), wherein the third reset permanent magnet (53) is arranged on the internal structure (23), and the fourth reset permanent magnet (54) is arranged on the external structure (22), and the third reset permanent magnet (53) and the fourth reset permanent magnet (54) are arranged opposite to each other and have different magnetic poles on opposite sides; when the optical lens (3) is in the reset position, the angle between the magnetization direction of the third reset permanent magnet (53) and the fourth reset permanent magnet (54) and the plane where the optical lens (3) is located is greater than or equal to 0 degrees and less than 90 degrees.

9. A galvanometer according to claim 8, characterized in that: The external structure (22) and the internal structure (23) are both annular closed frame structures.

10. A galvanometer according to any one of claims 2 to 6, characterized in that: The driving component (4) comprises a first driving coil (42) and a first driving magnet (41) which are arranged opposite to each other. One of the first driving coil (42) or the first driving magnet (41) is arranged on the base (1), and the other is arranged on the carrier (2). When the first driving coil (42) is energized, it interacts with the first driving magnet (41) to generate a driving force, thereby driving the carrier (2) to move.

11. The galvanometer according to claim 8, characterized in that: The driving component (4) comprises a first driving coil (42) and a first driving magnet (41) which are arranged opposite to each other, wherein one of the first driving coil (42) or the first driving magnet (41) is arranged on the base (1), and the other is arranged on the external structure (22); when the first driving coil (42) is energized, it interacts with the first driving magnet (41) to generate a driving force, thereby driving the external structure (22) and the internal structure (23) to move together; The driving component (4) further comprises a second driving coil (43) and a second driving magnet (44) which are arranged opposite to each other. One of the second driving coil (43) or the second driving magnet (44) is arranged on the external structure (22), and the other is arranged on the internal structure (23). When the second driving coil (43) is energized, it interacts with the second driving magnet (44) to generate a driving force, thereby driving the internal structure (23) to move.

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