A galvanometer focal length height adjusting device

Abstract

The utility model relates to printing equipment technical field, especially a galvanometer focal length height adjusting device, including the base mechanism that inside is provided with horizontal passage, the upper side wall of base mechanism is equipped in galvanometer mechanism, transmission mechanism is equipped in horizontal passage, transmission mechanism protrudes from the upper side wall and is connected with galvanometer mechanism. By setting the transmission mechanism, the horizontal movement in the first preset direction is converted into the vertical movement in the second preset direction, without involving the adjustment of optical lenses such as collimating lens group, avoiding the problem that the value of focused light beam M 2 changes due to the change of beam divergence angle in the prior art, ensuring the consistency of energy density after each laser focusing, and avoiding the poor printing quality caused by uneven energy from the root, in addition, directly adjusting the distance from the galvanometer mechanism to the working plane provides hardware support for the consistency adjustment of multiple laser focal heights, solving the problem of poor printing product quality caused by the difference in focal height plane during the cooperative work of multiple lasers.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a galvanometer focal length and height adjustment device. Background Technology

[0002] SLM metal 3D printing technology is based on the principle of selective laser melting. It uses a high-energy-density laser beam to melt metal powder layer by layer to achieve the cumulative manufacturing of three-dimensional metal parts. It is widely used in mold manufacturing, medical device manufacturing, aerospace parts manufacturing and other fields.

[0003] In laser additive manufacturing equipment, the galvanometer scanning system is one of the core components. After the laser beam is output from the laser fiber, it is successively expanded by a beam expander, shaped into parallel light by a collimating lens, deflected by an XY reflector to achieve planar movement, and finally focused onto the working plane by a field lens.

[0004] In existing technologies, when multiple lasers work together, differences in lens processing and coating, as well as fixed mounting planes, can easily lead to deviations in the height plane of each laser focus, resulting in uneven energy density in the printing area and affecting product quality. Current adjustment methods adjust the focal length height by adjusting the divergence angle of the collimating lens group, but this can cause variations in the maximum mass of the focused beam. 2 The value (beam quality factor) changes, thus degrading the beam quality. Utility Model Content

[0005] In view of this, the present invention provides a galvanometer focal length and height adjustment device to solve the problem of differences in the focal height plane caused by the difference in the printed product quality when multiple lasers work together.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by this utility model is to provide a galvanometer focal length and height adjustment device, the galvanometer focal length and height adjustment device comprising:

[0007] A base mechanism, wherein a horizontal channel is provided inside the base mechanism;

[0008] A galvanometer mechanism is disposed on the upper side wall of the base mechanism;

[0009] A transmission mechanism, wherein the transmission mechanism is disposed in the horizontal channel, the transmission mechanism protrudes from the upper sidewall and is connected to the galvanometer mechanism; and

[0010] A control mechanism is connected to the transmission mechanism, which controls the transmission mechanism to move back and forth along a first preset direction, and the transmission mechanism drives the galvanometer mechanism to move back and forth along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction, and the first preset direction is the same as the direction of the horizontal channel.

[0011] As one embodiment of this utility model, the transmission mechanism includes

[0012] An adjusting rod and a lifting pin are provided. The adjusting rod is located in the horizontal channel. One end of the lifting pin abuts against the adjusting rod, and the other end protrudes from the upper sidewall and is connected to the galvanometer mechanism.

[0013] The control mechanism controls the adjusting linkage to move back and forth along the first preset direction, the adjusting linkage drives the lifting pin to move back and forth along the second preset direction, and the lifting pin drives the galvanometer mechanism to move back and forth along the second preset direction.

[0014] As an embodiment of this utility model, the upper sidewall is provided with a pin channel communicating with the horizontal channel, the lifting pin is provided in the pin channel, the adjusting rod is provided with an inclined groove inclined along the first preset direction, one end of the lifting pin abuts against the inclined groove, and the other end protrudes out of the pin channel and is connected to the galvanometer mechanism.

[0015] As an embodiment of the present invention, the inclined groove has a first inclined wall, and the end of the lifting pin that abuts against the inclined groove forms a second inclined wall, the second inclined wall and the first inclined wall being in close contact with each other.

[0016] As an embodiment of this utility model, the control mechanism includes an adjusting nut, which is threadedly connected to the adjusting rod and is used to control the adjusting rod to move back and forth along the first preset direction.

[0017] As an embodiment of this utility model, the control mechanism further includes an adjusting tailstock, which is connected to the adjusting link and is opposite to the adjusting nut, for maintaining the adjusting link horizontally.

[0018] As an embodiment of the present invention, the control mechanism further includes a reset elastic element, which is disposed on the adjusting tail seat and elastically connected to the adjusting linkage.

[0019] As an embodiment of this utility model, the galvanometer mechanism includes a galvanometer mounting plate and a galvanometer assembly. The galvanometer assembly is fixedly connected to the galvanometer mounting plate. The galvanometer mounting plate is disposed on the upper side wall. The lifting pin protrudes from the upper side wall and is connected to the galvanometer mounting plate, thereby driving the galvanometer mounting plate and the galvanometer assembly to move back and forth along the second preset direction.

[0020] As an embodiment of this utility model, the galvanometer focal length height adjustment device further includes a pre-compression elastic element, which passes through the galvanometer mounting plate and is elastically connected to the base mechanism.

[0021] As an embodiment of this utility model, a through hole is provided in the middle of the base mechanism, and the through hole is used for assembling the field lens.

[0022] Compared with the prior art, the galvanometer focal length and height adjustment device provided in this embodiment of the present invention has the following advantages:

[0023] 1. In the galvanometer focal length and height adjustment device provided by this utility model, a transmission mechanism is set to convert the horizontal movement in the first preset direction into the vertical movement in the second preset direction, thereby adjusting the distance between the galvanometer mechanism and the working plane. The entire process does not involve adjusting optical lenses such as the collimating lens group, thus avoiding the problem in the prior art where changing the beam divergence angle leads to issues with the focused beam M. 2 This addresses the issue of beam quality factor variation, ensuring the original optical performance of the laser beam and guaranteeing consistent energy density after focusing each laser. This fundamentally reduces print quality differences caused by uneven energy distribution. Furthermore, it directly adjusts the distance between the galvanometer mechanism and the working plane, providing hardware support for consistent adjustment of the height of multiple laser focal points. This solves the problem of print quality differences caused by differences in the focal height plane when multiple lasers work together.

[0024] 2. In the galvanometer focal length height adjustment device provided by this utility model, the first inclined wall of the inclined groove of the adjusting rod is engaged with the second inclined wall of the lifting pin to achieve precise conversion between horizontal and vertical displacement. With the scale of the adjusting nut, not only can the adjustment amount be quantitatively controlled, but also the symmetrical distribution of the adjustment on both sides and the synchronous rotation of the adjusting nut at the same angle ensure the quantitative movement of the galvanometer mechanism, further ensuring the consistency of the height plane of multiple laser focal points.

[0025] 3. In the galvanometer focal length and height adjustment device provided by this utility model, the pre-pressed elastic element continuously applies pre-tightening force to ensure that the lifting pin and the inclined groove of the adjusting rod are tightly fitted, ensuring that the lifting pin and the inclined groove of the adjusting rod are always in close contact, eliminating the gap between the lifting pin and the inclined groove of the adjusting rod, preventing insufficient movement of the adjusting rod controlled by the adjusting nut, effectively pressing the fit between the first inclined wall and the second inclined wall, and improving the adjustment accuracy of the adjustment device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] in:

[0028] Figure 1This diagram shows the overall structure of the galvanometer focal length and height adjustment device provided in this embodiment of the present invention.

[0029] Figure 2 An exploded view of the galvanometer focal length and height adjustment device provided in this embodiment of the present invention is shown.

[0030] Figure 3 This invention provides a schematic diagram of the base mechanism of the galvanometer focal length and height adjustment device according to an embodiment of the present invention.

[0031] Figure 4 It shows Figure 3 A cross-sectional structural diagram of the central base mechanism;

[0032] Figure 5 This diagram shows a front view of the galvanometer focal length and height adjustment device provided in an embodiment of the present invention.

[0033] Figure 6 It shows Figure 5 A cross-sectional schematic diagram of the focal length and height adjustment device for the galvanometer.

[0034] Figure 7 It shows Figure 6 A partially enlarged structural diagram of section A in the middle;

[0035] Figure 8 This diagram illustrates a portion of the structure of the galvanometer focal length and height adjustment device provided in an embodiment of the present invention. Figure 1 ;

[0036] Figure 9 It shows Figure 8 A schematic diagram of the middle part of the structure from another angle.

[0037] Explanation of reference numerals in the attached diagram:

[0038] 1. Galvanometer focal length and height adjustment device; 11. Base mechanism; 111. Horizontal channel; 112. Upper sidewall;

[0039] 113. Pin channel; 114. Through hole; 115. Concentric hole; 12. Galvanometer mechanism; 121. Galvanometer mounting plate; 122. Galvanometer assembly; 13. Transmission mechanism; 131. Adjusting rod; 1311. Inclined groove; 1312. First inclined wall; 132. Lifting pin; 1321. Second inclined wall; 14. Control mechanism; 141. Adjusting nut; 142. Adjusting tailstock; 143. Reset elastic element; 15. Preload elastic element; 16. Field lens. Detailed Implementation

[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0042] It is understood that the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that terms such as “comprising,” “including,” or “having” specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0043] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only. In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this invention and its embodiments and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0044] Furthermore, the terms "set up," "equipped with," "connected," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0045] Example

[0046] Please combine Figures 1 to 4 As shown, an embodiment of this utility model discloses a galvanometer focal length height adjustment device 1. The galvanometer focal length height adjustment device 1 includes a base mechanism 11, a galvanometer mechanism 12, a transmission mechanism 13, and a control mechanism 14. The base mechanism 11 has a horizontal channel 111 inside. The galvanometer mechanism 12 is disposed on the upper side wall 112 of the base mechanism 11. The transmission mechanism 13 is disposed on the horizontal channel 111 and protrudes from the upper side wall 112 and is connected to the galvanometer mechanism 12. The control mechanism 14 is connected to the transmission mechanism 13 and controls the transmission mechanism 13 to move back and forth along a first preset direction. The transmission mechanism 13 drives the galvanometer mechanism 12 to move back and forth along a second preset direction. The second preset direction is perpendicular to the first preset direction, and the first preset direction is the same as the direction of the horizontal channel 111.

[0047] It is understood that this utility model converts horizontal motion into vertical motion by setting a transmission mechanism 13, directly adjusting the distance between the galvanometer and the working plane. Structurally, it ensures that the adjustment process does not change the quality of the laser beam, avoids relying on optical lenses for adjustment, and thus avoids changing the quality of the laser beam. It ensures that the energy density of each laser is consistent after focusing, and provides hardware support for the consistent adjustment of the focal height of multiple lasers. Therefore, it effectively solves the problem of differences in the focal height plane caused by the difference in the printed product quality when multiple lasers work together.

[0048] Specifically, the base mechanism 11 is an integral support structure with a horizontal channel 111 inside. The horizontal channel 111 extends in the left and right direction. The top of the transmission mechanism 13 protrudes from the upper side wall 112 of the base mechanism 11 and contacts and connects with the bottom of the galvanometer mechanism 12. The control mechanism 14 is connected to the end of the transmission mechanism 13 and is used to control the transmission mechanism 13 to move back and forth in the first preset direction, that is, in the horizontal left and right direction. The transmission mechanism 13 converts the horizontal movement into vertical movement through the inclined surface contact, driving the galvanometer mechanism 12 to move back and forth in the second preset direction, that is, in the vertical up and down direction.

[0049] Furthermore, please combine Figure 2 and Figure 4 As shown, the base mechanism 11 has a through hole 114 in the middle, which is used to assemble the field mirror 16.

[0050] Specifically, the through hole 114 is a circular through hole that runs through the top and bottom, with a diameter matching the outer diameter of the scene. The through hole 114 is coaxial with the optical path of the galvanometer mechanism 12, and is used to accommodate the field lens 16 and ensure that the laser beam passes through without obstruction, thereby ensuring that the field lens 16 focuses the beam scanned by the galvanometer mechanism 12 and performs other optimization processing.

[0051] Furthermore, please combine Figure 2 and Figure 7 As shown, the transmission mechanism 13 includes an adjusting link 131 and a lifting pin 132. The adjusting link 131 is located in the horizontal channel 111. One end of the lifting pin 132 abuts against the adjusting link 131, and the other end protrudes from the upper sidewall 112 and is connected to the galvanometer mechanism 12. The control mechanism 14 controls the adjusting link 131 to move back and forth along the first preset direction. The adjusting link 131 drives the lifting pin 132 to move back and forth along the second preset direction. The lifting pin 132 drives the galvanometer mechanism 12 to move back and forth along the second preset direction.

[0052] Specifically, please combine Figure 2 and Figure 5 As shown, there are two horizontal channels 111 and two adjusting rods 131. The two horizontal channels 111 are located inside the base mechanism 11 and at two symmetrical positions to the left and right of the through hole 114. The two adjusting rods 131 are respectively located in the two horizontal channels 111. There are four lifting pins 132. Every two lifting pins 132 abut against one adjusting rod 131, and every two lifting pins 132 abut against the left and right parts of the adjusting rod 131 respectively.

[0053] Furthermore, please combine Figure 2 , Figure 5 and Figure 6 As shown, the galvanometer mechanism 12 includes a galvanometer mounting plate 121 and a galvanometer assembly 122. The galvanometer assembly 122 is fixedly connected to the galvanometer mounting plate 121. The galvanometer mounting plate 121 is disposed on the upper side wall 112. The lifting pin 132 protrudes from the upper side wall 112 and is connected to the galvanometer mounting plate 121, thereby driving the galvanometer mounting plate 121 and the galvanometer assembly 122 to move back and forth along the second preset direction.

[0054] Specifically, the galvanometer mounting plate 121 is a support for the galvanometer assembly 122. The galvanometer mounting plate 121 can move up and down within the through hole 114 of the base mechanism 11. The galvanometer assembly 122 is fixed to the galvanometer mounting plate 121 by screws. When adjusting the height, the galvanometer assembly 122 and the galvanometer mounting plate 121 move up and down together under the action of the lifting pin 132. The bottom surface of the galvanometer mounting plate 121 and the base mechanism 11 are precisely matched with the shaft hole, which can restrict the other degrees of freedom of the galvanometer mounting plate 121 except for up and down, and also play a sealing role.

[0055] Furthermore, please combine Figure 3 , Figure 4 and Figure 7 As shown, the upper sidewall 112 has a pin channel 113 that communicates with the horizontal channel 111. The lifting pin 132 is located in the pin channel 113. The adjusting rod 131 has an inclined groove 1311 that is inclined along the first preset direction. One end of the lifting pin 132 abuts against the inclined groove 1311, and the other end protrudes out of the pin channel 113 and is connected to the galvanometer mechanism 12.

[0056] Furthermore, please combine Figure 8 and Figure 9 As shown, the inclined groove 1311 has a first inclined wall 1312, and the end of the lifting pin 132 that abuts against the inclined groove 1311 forms a second inclined wall 1321, and the second inclined wall 1321 and the first inclined wall 1312 are in close contact with each other.

[0057] Specifically, the inclined groove 1311 has a first inclined wall 1312 at 45°, the lifting pin 132 is vertically set, and the lower end has a second inclined wall 1321 at 45° that abuts against and fits against the first inclined wall 1312 at 45°, thus cooperating to realize the conversion of the movement direction.

[0058] Furthermore, please combine Figure 2 , Figure 6 as well as Figure 7 As shown, the control mechanism 14 includes an adjusting nut 141, which is threadedly connected to the adjusting rod 131 and is used to control the adjusting rod 131 to move back and forth along the first preset direction.

[0059] Specifically, there are two adjusting nuts 141, which are connected to the same end of two adjusting rods 131 respectively. The up and down movement of the galvanometer mechanism 12 can be adjusted by rotating the two adjusting nuts 141 by the same angle each time. When the adjusting nut 141 rotates clockwise, the adjusting rod 131 moves in the first preset direction (i.e., to the left). When the adjusting nut 141 rotates counterclockwise, the adjusting rod 131 moves in the opposite direction to the first preset direction (i.e., to the right).

[0060] Specifically, please participate Figure 9 As shown, the outer side of the adjusting nut 141 is a smooth cylindrical surface that fits with the shaft hole of the base mechanism 11. The inner side has an internal thread that is threaded to the external thread of the adjusting rod 131. The adjusting nut 141 rotates around its own axis and drives the adjusting rod 131 to move back and forth along the first preset direction through the thread transmission. The surface of the adjusting nut 141 is provided with a scale to quantify the rotation angle and calculate the rotation angle according to the required adjustment height.

[0061] More specifically, in this embodiment of the present invention, when the adjusting nut 141 controls the adjusting rod 131 to move 1mm to the left, the lifting pin 132 drives the galvanometer mechanism 12 to descend 1mm. When the adjusting rod 131 moves 1mm to the right, the upward force transmitted through the inclined plane causes the lifting pin 132 to drive the galvanometer mechanism 12 to move upward 1mm.

[0062] It is understandable that by adjusting the first inclined wall 1312 of the inclined groove 1311 of the connecting rod 131 and the second inclined wall 1321 of the lifting pin 132 to achieve precise conversion between horizontal and vertical displacement, and with the scale of the adjusting nut 141, not only can the adjustment amount be quantitatively controlled, but also the symmetrical distribution of the adjustment on both sides and the synchronous rotation of the adjusting nut 141 at the same angle ensure the quantitative movement of the galvanometer mechanism 12, further ensuring the consistency of the height plane of the multiple laser focal points.

[0063] Furthermore, please combine Figure 2 , Figure 6 as well as Figure 7 As shown, the control mechanism 14 also includes an adjusting tailstock 142, which is connected to the adjusting link 131 and is opposite to the adjusting nut 141, for maintaining the adjusting link 131 horizontally.

[0064] Specifically, the adjusting tailstock 142 and the adjusting nut are located at both ends of the adjusting rod 131, and the interior of the adjusting tailstock is provided with a bearing connected to the end of the adjusting rod 131 to support the adjusting rod 131 and maintain its horizontal state.

[0065] More specifically, please combine Figure 4 and Figure 7 As shown, the horizontal channel 111 of the adjusting rod 131 has a concentric circular hole 115 at both ends. The adjusting nut 141 and the adjusting tail seat 142 support the two ends of the adjusting rod 131 in their two concentric circular holes 115, so that the rod remains horizontal.

[0066] Furthermore, please combine Figure 7 and Figure 8As shown, the control mechanism 14 also includes a reset elastic element 143, which is disposed on the adjusting tail seat 142 and elastically connected to the adjusting connecting rod 131.

[0067] Specifically, the reset spring is a tension spring, one end of which is connected to the height adjustment tail seat, and the other end is connected to the hook at the end of the adjusting rod 131. It has a certain pre-tension force to provide the reset force, which pulls the adjusting rod 131 until the lifting pin 132 abuts against the bottom of the inclined groove 1311, so that the adjusting rod 131 resets.

[0068] Furthermore, please combine Figure 2 and Figure 5 As shown, the galvanometer focal length height adjustment device 1 also includes a pre-compression elastic element 15, which passes through the galvanometer mounting plate 121 and is elastically connected to the base mechanism 11.

[0069] Specifically, please combine Figures 5 to 9 As shown, there are four preload springs, symmetrically distributed at the four corners of the galvanometer mounting plate 121. The springs generate downward preload through compression, ensuring that the lifting pin 132 and the inclined groove 1311 of the adjusting rod 131 are always in close contact, eliminating the gap between the lifting pin 132 and the inclined groove 1311 of the adjusting rod 131, preventing insufficient movement of the adjusting rod 131 controlled by the adjusting nut 141, effectively pressing the fit between the first inclined wall 1312 and the second inclined wall 1321, improving the adjustment accuracy and long-term stability of the adjusting device.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A galvanometer focal length and height adjustment device, characterized in that: The galvanometer focal length and height adjustment device includes A base mechanism, wherein a horizontal channel is provided inside the base mechanism; A galvanometer mechanism is disposed on the upper side wall of the base mechanism; A transmission mechanism, wherein the transmission mechanism is disposed in the horizontal channel, the transmission mechanism protrudes from the upper sidewall and is connected to the galvanometer mechanism; and A control mechanism is connected to the transmission mechanism, which controls the transmission mechanism to move back and forth along a first preset direction, and the transmission mechanism drives the galvanometer mechanism to move back and forth along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction, and the first preset direction is the same as the direction of the horizontal channel.

2. The galvanometer focal length and height adjustment device according to claim 1, characterized in that: The transmission mechanism includes An adjusting rod and a lifting pin are provided. The adjusting rod is located in the horizontal channel. One end of the lifting pin abuts against the adjusting rod, and the other end protrudes from the upper sidewall and is connected to the galvanometer mechanism. The control mechanism controls the adjusting linkage to move back and forth along the first preset direction, the adjusting linkage drives the lifting pin to move back and forth along the second preset direction, and the lifting pin drives the galvanometer mechanism to move back and forth along the second preset direction.

3. The galvanometer focal length and height adjustment device according to claim 2, characterized in that: The upper sidewall has a pin channel communicating with the horizontal channel. The lifting pin is located in the pin channel. The adjusting rod has an inclined groove that is inclined along the first preset direction. One end of the lifting pin abuts against the inclined groove, and the other end protrudes out of the pin channel and is connected to the galvanometer mechanism.

4. The galvanometer focal length and height adjustment device according to claim 3, characterized in that: The inclined groove has a first inclined wall, and the end of the lifting pin that abuts against the inclined groove forms a second inclined wall, with the second inclined wall and the first inclined wall fitting together.

5. The galvanometer focal length and height adjustment device according to claim 2, characterized in that: The control mechanism includes an adjusting nut, which is threadedly connected to the adjusting rod and is used to control the adjusting rod to move back and forth along the first preset direction.

6. The galvanometer focal length and height adjustment device according to claim 5, characterized in that: The control mechanism further includes an adjusting tailstock, which is connected to the adjusting link and opposite to the adjusting nut, for maintaining the adjusting link horizontally.

7. The galvanometer focal length and height adjustment device according to claim 6, characterized in that: The control mechanism also includes a reset elastic element, which is disposed on the adjusting tailstock and elastically connected to the adjusting linkage.

8. The galvanometer focal length and height adjustment device according to claim 2, characterized in that: The galvanometer mechanism includes a galvanometer mounting plate and a galvanometer assembly. The galvanometer assembly is fixedly connected to the galvanometer mounting plate. The galvanometer mounting plate is located on the upper side wall. The lifting pin protrudes from the upper side wall and is connected to the galvanometer mounting plate, thereby driving the galvanometer mounting plate and the galvanometer assembly to move back and forth along the second preset direction.

9. The galvanometer focal length and height adjustment device according to claim 8, characterized in that: The galvanometer focal length and height adjustment device also includes a pre-compression elastic element, which passes through the galvanometer mounting plate and is elastically connected to the base mechanism.

10. The galvanometer focal length and height adjustment device according to claim 1, characterized in that: The base mechanism has a through hole in the middle, which is used to assemble the field lens.

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