Laser gun for laser scanning device

Abstract

The present application relates to a laser gun for a laser scanning device, the laser gun comprising: an elongated gun barrel; a laser transmission line extending from the outside of the gun barrel into the gun barrel and extending along the gun barrel toward its head end; a collimator, arranged in the gun barrel and optically connected to the head end of the laser transmission line; a reflector frame with a reflector, arranged in the gun barrel and adjacent to the collimator; a transmission rod extending from the outside of the gun barrel into the gun barrel and operably connected to the reflector frame for driving the reflector frame to rotate; a mounting seat arranged in the gun barrel and having a collimator mounting portion and a reflector frame mounting portion; when the laser gun is working, laser light from the laser transmission line is collimated by the collimator and then incident on the reflector of the reflector frame, and the outgoing laser light formed by the reflection of the reflector is emitted along a plurality of different angles as the reflector frame rotates, so that the outgoing laser light performs a scanning operation within a predetermined scanning angle range.

Description

Technical Field

[0001] The present application relates to an optical instrument or system, and in particular to a laser gun used in a laser scanning device. Background Art

[0002] Closed industrial furnaces such as blast furnaces have high temperature, high pressure, high dust and other furnace environments, so it is difficult to observe through the observation window with human eyes. To this end, various detection devices have been proposed to obtain information inside the furnace, such as infrared cameras, microwave scanning, laser scanning, etc.

[0003] The Chinese patent application with application number 2024111313696 proposes a laser scanning device, which may include a laser gun and an outer sleeve inserted therein. The laser scanning device can be installed in an industrial kiln such as a blast furnace, so that its head end extends into the furnace and the tail end is located outside the furnace, and the laser emitted from the head end can be scanned in the furnace to obtain information inside the furnace. The laser gun is used to transmit the laser generated by the laser generator outside the furnace to the furnace. The outer sleeve can protect the laser gun to adapt to the harsh environment in the furnace, and the outer sleeve can also provide other auxiliary and support functions. In one embodiment of the laser gun, the laser transmission line extends in the long barrel of the laser gun and is used to transmit the laser, which is collimated by a collimator and reflected into the furnace by a reflector. The reflector frame with the reflector is driven to rotate by a motor drive assembly to perform scanning operations within a predetermined scanning angle range. The present application relates to changes and / or improvements to the laser scanning device in Chinese Patent Application No. 2024111313696. Therefore, the entire contents of the Chinese patent application are hereby incorporated into the present specification by reference. Summary of the invention

[0004] The purpose of this application is to provide a laser gun for a laser scanning device.

[0005] The laser gun may include: an elongated barrel, the barrel extending in a length direction and having a head end and a tail end opposite to each other in the length direction; a laser transmission line for transmitting laser light, extending from the outside of the barrel into the barrel and extending along the barrel toward the head end; a collimator, arranged in the barrel and optically connected to the head end of the laser transmission line; a reflector frame with a reflector, arranged in the barrel and adjacent to the collimator; a transmission rod extending from the outside of the barrel into the barrel and connected to the reflector frame The invention relates to a laser beam transmission line, wherein the laser beam is operably connected to drive the reflector frame to rotate; the mounting seat is arranged in the gun barrel and has a collimating lens mounting portion for holding the collimating lens and a reflector frame mounting portion for rotatably holding the reflector frame; wherein when the laser gun is working, the laser from the laser transmission line is collimated by the collimating lens and then incident on the reflector of the reflector frame, and the outgoing laser formed by the reflection of the reflector is emitted along a plurality of different angles as the reflector frame rotates, so that the outgoing laser performs a scanning operation within a predetermined scanning angle range.

[0006] Optionally, the collimator lens mounting portion includes a collimator lens accommodating hole for receiving the collimator lens.

[0007] Optionally, the collimator mounting portion has at least one top screw through hole for receiving a top screw, and the top screw through hole extends from the outer surface of the collimator mounting portion to the collimator accommodating hole, so that the top screw passes through the collimator accommodating hole to support the collimator and fix the collimator.

[0008] Optionally, the laser gun includes at least two top screw through holes extending in different directions.

[0009] Optionally, the collimator mirror mounting portion is formed with a first transmission rod through hole allowing the transmission rod to pass through, and the reflector frame mounting portion is formed with a second transmission rod through hole allowing the transmission rod to pass through; wherein, the first transmission rod through hole and the second transmission rod through hole are coaxially arranged along the same straight line parallel to the length direction of the gun barrel.

[0010] Optionally, the reflector frame mounting portion includes an end wall portion and a first side wall and a second side wall extending from the end wall portion; the reflector frame is rotatably arranged between the first side wall and the second side wall.

[0011] Optionally, the first side wall and the second side wall of the reflector frame mounting portion are mirror-symmetrical.

[0012] Optionally, the laser gun further comprises a slider connected to the transmission rod, the slider is arranged between the first side wall and the second side wall, and the reflector frame is rotatably connected to the slider, and the transmission rod drives the reflector frame to rotate via the slider.

[0013] Optionally, inner surfaces of the first side wall and the second side wall of the reflector frame mounting portion are respectively formed with slideways for supporting the slider, and the slider can move linearly along the length direction of the gun barrel on the slideways.

[0014] Optionally, the slider is substantially door-shaped, and the two side walls of the slider are slidably supported on the first side wall and the second side wall of the reflector frame mounting portion respectively; the reflector frame is rotatably connected to the slider between the two side walls of the slider.

[0015] Optionally, the mounting seat further has a connecting portion located between the collimating mirror mounting portion and the reflecting mirror frame mounting portion; the mounting seat is connected to the gun barrel via the connecting portion.

[0016] Optionally, the connecting portion is formed with a keyway recessed inwardly from its outer surface at a position corresponding to the through slot of the gun barrel, and a first through hole penetrating the connecting portion is formed in the keyway; the laser gun further comprises: a key capable of being fixedly connected to the mounting seat, and the shape of the key matches the shape of the through slot of the gun barrel and is retained in the through slot, and a portion of the key also extends into the keyway of the mounting seat; the key has a second threaded through hole, and the second threaded through hole is substantially aligned with the first through hole; and a threaded fastener for connecting the key to the mounting seat, the threaded fastener having opposite first and second ends and being in a fixed position. The second end portion is formed with an engaging portion for engaging a screwing tool; the threaded fastener is held in the first through hole of the mounting seat, and the second end portion extends out of the first through hole toward the gun barrel; wherein, during assembly, the second threaded through hole of the key is aligned with the second end portion of the threaded fastener outside the gun barrel, and the screwing tool is passed through the second threaded through hole of the key to engage with the engaging portion of the threaded fastener; the screwing tool screws the threaded fastener using the engaging portion, so that the threaded fastener is gradually screwed into the second threaded through hole of the key and forms a threaded connection with the second threaded through hole.

[0017] Optionally, at least a portion of the circumferential outer contour of the mounting seat matches the inner circumferential contour of the barrel wall of the gun barrel to substantially prevent the mounting seat from moving laterally in the gun barrel in a direction perpendicular to the length direction of the gun barrel.

[0018] Optionally, in the assembled state, said portion of said key extends substantially across the full depth of said keyway.

[0019] Optionally, in the assembled state, the outer surface of the key is substantially flush or recessed relative to the outer surface of the barrel, and the length of the threaded fastener is arranged so that the second end of the threaded fastener is substantially flush or recessed relative to the outer surface of the barrel in the assembled state.

[0020] Optionally, the length of the threaded fastener is configured such that the second end of the threaded fastener is substantially flush with the circumferential outer contour of the mounting seat in an assembled state.

[0021] Optionally, the threaded fastener has a fastener head and a fastener shank with a thread, the fastener head has an enlarged size relative to the fastener shank, the fastener head forms the first end of the threaded fastener, and the terminal end of the fastener shank forms the second end of the threaded fastener; the first through hole has a flared section and a narrowed section along its extension direction, the lateral dimension of the flared section is greater than the lateral dimension of the narrowed section; a step portion is formed between the transition between the flared section and the narrowed section, and the fastener head of the threaded fastener can be received in the flared section; the fastener shank of the threaded fastener extends through the narrowed section of the first through hole; the laser gun also includes a retaining member, which is connected to the mounting seat and extends transversely relative to the first through hole outside or inside the first through hole to retain the threaded fastener in the first through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An embodiment of a laser gun for a laser scanning device of the present application is shown;

[0023] Figure 2 yes Figure 1 A perspective view of the reflector frame in the figure;

[0024] Figure 3 yes Figure 1 A perspective view of the mount in FIG.

[0025] Figure 4 yes Figure 3 A perspective view of the mount as viewed from another upward angle;

[0026] Figure 5 Shows Figure 3 A mounting seat and a slider and a transmission rod mounted to the mounting seat;

[0027] Figure 6The assembled state of the mount and the components connected thereto, which is to be inserted into the barrel of the laser gun;

[0028] Figure 7 Shows Figure 6 The structure shown has been arranged in place in the barrel, and the mounting base and the barrel will be connected with a key;

[0029] Figure 8 It is a schematic diagram of the vertical projection position relationship of the gun barrel, the mounting seat and the key;

[0030] Fig. 9 is a partial transverse cross-sectional schematic diagram of an assembled laser gun;

[0031] Fig.10 is a partial longitudinal cross-sectional schematic diagram of an assembled laser gun;

[0032] Fig.11 This is a partial bottom view of the assembled laser gun;

[0033] Fig.12 This is a schematic diagram of the assembly of the mount and key after ignoring the barrel;

[0034] Fig.13 yes Figure 1 A partial enlarged view of the tail end of the laser gun shown;

[0035] Fig.14 It is a perspective view of the outer wall of the gun barrel;

[0036] Fig.15 yes Fig.13 The first installation schematic diagram of the tail end sealing assembly of the tail end of the laser gun is shown, wherein the sealing ring and the sealing sleeve are hidden;

[0037] Fig.16 yes Fig.13 A second installation diagram of the tail end sealing assembly of the tail end of the laser gun shown in FIG.

[0038] Fig.17 yes Fig.13 The first installation schematic diagram of the tail end sealing assembly of the tail end of the laser gun shown, wherein the sealing ring and the sealing sleeve are shown;

[0039] Fig.18 yes Fig.13 The schematic diagram of the tail end sealing assembly of the tail end of the laser gun after the injection hole cover is installed;

[0040] Fig.19 yes Fig.18 A schematic diagram of the disassembled filling hole cover shown;

[0041] Fig. 20 yes Fig.19A perspective view of the top cover of the injection hole shown;

[0042] Fig.21 yes Fig.19 A perspective view of the lower cover of the injection hole is shown. DETAILED DESCRIPTION

[0043] The technical solution provided by the present invention is further described below in conjunction with the embodiments. In these drawings, the same or similar components are marked with the same or similar reference numerals.

[0044] like Figure 1 As shown, the laser gun can be used in a laser scanning device and can include an elongated barrel 100. The barrel 100 can extend along a length direction or an axial direction and has a head end and a tail end opposite to each other along the length direction or the axial direction. Figure 1 The left end is called the tail end, and the right end is called the head end.

[0045] The laser transmission line 320 can extend from the outside of the gun barrel 100 to the inside of the gun barrel 100, and extend along the gun barrel 100 toward the head end thereof. The laser generated by the laser generator 310 outside the gun barrel 100 can be transmitted to a desired position by the laser transmission line 320. The laser transmission line 320 can include one or more optical fibers. A collimator 330 mechanically and optically connected to the head end of the laser transmission line 320 can also be arranged in the gun barrel 100, for receiving the laser from the laser transmission line 320, and outputting it after collimation.

[0046] The reflector frame 400 may be disposed inside the gun barrel 100 and may be disposed adjacent to the collimator lens 330. Figure 2 It can be seen more clearly in the figure that the reflector frame 400 can carry a reflector M, so that the laser from the collimating mirror 330 can be reflected by the reflector M.

[0047] return Figure 1 , the reflector frame 400 can be driven by the motor drive assembly 200 to rotate. The motor drive assembly 200 can include a motor 210 and a transmission rod 220. The transmission rod 220 can extend from the outside of the gun barrel 100 into the gun barrel 100, and extend along the gun barrel 100 toward its head end. The transmission rod 220 can be operably connected to the reflector frame 400 and the motor 210 respectively. The motor 210 can drive the transmission rod 220 to make a linear motion, and drive the reflector frame 400 and the reflector M carried by the linear motion of the transmission rod 220 to rotate around the axis A.

[0048] Near the head end of the barrel 100, the collimator 330, the reflector frame 400 and the transmission rod 220 can be held in the barrel 100 by the mounting seat 500, which will be described in detail later. At the tail end of the barrel 100, the tail end sealing assembly 600 can sealably support the transmission rod 220 and the laser transmission line 320, which will be described in detail in the last part of the specification.

[0049] Figure 2 is a specific example of a reflector frame 400 on which a reflector M is mounted. Figure 1 As described above, the motor drive assembly 200 can drive the reflector frame 400 to rotate around the axis A. To this end, the reflector frame 400 can be formed with an axial hole 410, and the axial hole 410 can pass through the reflector frame 400 along the axis A. In the assembled state, a shaft (not shown) can pass through the axial hole 410, and the two ends of the shaft can be respectively held at Figure 1 The reflector frame 400 may be provided with a pin hole 420, which may penetrate the reflector frame 400 in a direction parallel to the axis A. In the assembled state, a pin (not shown) may pass through the pin hole 420 and be operably connected to the drive rod 220 of the motor drive assembly 200. In this way, during operation, when the drive rod 220 of the motor drive assembly 200 moves linearly, the reflector frame 400 may be pushed or pulled by the pin hole 420 to rotate around the rotation axis A defined by the shaft hole 410. In some embodiments, the shaft hole 410 and / or the pin hole 420 may not penetrate the entire reflector frame 400, but may be formed as blind holes at corresponding positions on both sides of the reflector frame 400. The shaft or pin for inserting the shaft hole 410 and / or the pin hole 420 may not be a single shaft or pin, but two half shafts or pins inserted from both sides.

[0050] Combination Figure 1 and Figure 2 It can be seen that, when working, the laser generated by the laser generator 310 can be output through the laser transmission line 320 and the collimator 330, and incident on the reflector M carried by the reflector frame 400; the reflector M can receive and reflect the incident laser. The emitted laser formed by the reflection of the reflector M will be emitted along a plurality of different angles as the reflector frame 400 rotates, and will be emitted to the outside of the gun barrel 100 through the light slit or notch 103 formed on the end wall and / or side wall at the head end of the gun barrel 100, so as to perform laser scanning operations within a predetermined scanning angle range. The reflector frame 400 can rotate around the axis A in a plane, and the plane can be, for example, a plane perpendicular to the axis A (i.e. Figure 1 The plane on which the image is drawn) is also called the scanning plane.

[0051] The inventor of the present application has found that, since the inner space of the long cylindrical structure of the gun barrel 100 is small, it is difficult to install the collimator 330 and the reflector frame 400 into the gun barrel 100 respectively, and it is difficult to ensure the alignment between the collimator 330, the reflector M of the reflector frame 400, and the light exit slit or notch 103 of the barrel wall of the gun barrel 100. The inventor of the present application has also found that when a certain component is fixedly installed into the gun barrel 100, since the inner space of the long cylindrical structure of the gun barrel 100 is small, the conventional idea is to screw the component and the gun barrel 100 together from the outside of the gun barrel 100 through the barrel wall of the gun barrel 100 using fasteners such as screws. However, since the laser gun is often inserted into an outer sleeve when working (this can be referred to in Chinese patent application No. 2024111313696), when the screws and other fasteners are loose, they may fall into the space between the laser gun and the outer sleeve. In this way, when the laser gun needs to be pulled out of the outer sleeve for inspection, it may be stuck by the screws and cannot be pulled out normally.

[0052] For this reason, the inventor of the present application has carried out exquisite design to the structure of mounting seat 500 self and the connection structure between mounting seat 500 and gun barrel 100, to avoid the appearance of aforementioned unfavorable situation.As will be understood by the description below, collimator 330 and reflector frame 400 of the present application are installed and remain on the same mounting seat 500 place, can be designed by the shape and position of the installation part of mounting seat 500 self like this, collimator 330 and reflector frame 400 after installation are just basically aligned in advance.Before mounting seat 500 is put into gun barrel 100, collimator 330, reflector frame 400 and transmission rod 220 can be installed thereon, and the installed structure is inserted in the gun barrel 100 integrally.This installation process is owing to be carried out outside gun barrel 100, therefore can be carried out conveniently, and will not be subject to the restriction of the inner small space of gun barrel 100. Then, for the mounting seat 500 that has been inserted into the gun barrel 100, the mounting seat 500 can be connected to a predetermined position of the gun barrel 100 outside the gun barrel 100, and this connection method does not produce the risk of parts falling out of the gun barrel 100. In this way, not only the installation difficulty caused by the narrow space inside the gun barrel 100 is overcome, but also the alignment between related parts can be ensured, and it can also be ensured that there will be no pulling and pulling obstacles caused by the falling of parts between the gun barrel 100 and the outer sleeve where it is located. It can be understood by those skilled in the art that in some embodiments, only a part of the above-mentioned multiple technical means can be used to achieve the effect corresponding to the part of the technical means.

[0053] Figure 3 and Figure 4 An embodiment of the mounting base 500 is shown from different perspectives. Figure 5 The transmission rod 220 and the slider 540 are shown to have been installed to the mounting seat 500. Figure 6 It is shown in FIG. 5 that the collimating mirror 330 and the reflecting mirror frame 400 have been installed on the mounting base 500 .

[0054] like Figures 3 to 6 As shown, the mounting seat 500 may extend along a length direction and have a head end (right side in the figure) and a tail end (left side in the figure) opposite to each other along the length direction. The mounting seat 500 may have a collimator mirror mounting portion 510 located at the tail end thereof and a reflector frame mounting portion 530 located at the head end, the collimator mirror mounting portion 510 is used to mount and hold the collimator mirror 330, and the reflector frame mounting portion 530 is used to mount and hold the reflector frame 400. A connecting portion 520 may be provided between the collimator mirror mounting portion 510 and the reflector frame mounting portion 530.

[0055] The collimator lens mounting portion 510 may have a first transmission rod through hole 511 that allows the transmission rod 220 to pass through, and a collimator lens accommodating hole 512 for accommodating the collimator lens 330. The collimator lens accommodating hole 512 may be located below the first transmission rod through hole 511. The collimator lens mounting portion 510 may also have a top screw through hole 513 that passes through the outer surface of the collimator lens mounting portion 510 to the collimator lens accommodating hole 512. The top screw through hole 513 may be formed with threads. When installing the collimator lens 330, the collimator lens 330 may be inserted into the collimator lens accommodating hole 512, and then a top screw (not shown) may be screwed into the top screw through hole 513 until the collimator lens 330 is pressed against the top screw, so that the collimator lens 330 is fixedly held in the accommodating hole 512. In particular, Figure 4 As can be seen in the figure, the collimator lens mounting portion 510 can be provided with a plurality of top screw through holes 513 at a plurality of different positions, such as at the side wall and the bottom wall, so that the position of the collimator lens 330 in the collimator lens receiving hole 512 can be fine-tuned by adjusting the screwing depth of the top screw in different directions. In other embodiments, the collimator lens 330 can also be retained in the collimator lens receiving hole 512 by other means, such as a snap connection, etc.

[0056] The reflector frame mounting portion 530 may include an end wall portion 530A and a first side wall 530B and a second side wall 530C extending laterally therefrom. The end wall portion 530A may be cylindrical and may be matched with the inner wall of the cylindrical gun barrel 100. The end wall portion 530A may be formed with a second transmission rod through hole 531 therein that allows the transmission rod 220 to pass through. The first transmission rod through hole 511 and the second transmission rod through hole 531 extend along the same straight line or are coaxially arranged, and are substantially parallel to the length direction of the gun barrel 100, so as to constrain the transmission rod 220 inserted therein to move linearly according to a predetermined linear direction. The end wall portion 530A may also be formed with a light transmission hole 532 therein, and the light transmission hole 532 may be located below the second transmission rod through hole 531. The light-transmitting hole 532 is located on the optical path of the laser emitted from the collimating lens 330 in the collimating lens accommodating hole 512 , so as to allow the laser emitted from the collimating lens 330 to pass through the light-transmitting hole 532 and be incident on the reflector M carried by the reflector frame 400 .

[0057] The first side wall 530B and the second side wall 530C may be mirror-symmetrical, and a narrow passage for receiving the reflector frame 400 may be formed therebetween. The reflector frame 400 may be rotatably arranged between the first side wall 530B and the second side wall 530C, and connected to the first side wall 530B and the second side wall 530C. In this embodiment, the first side wall 530B and the second side wall 530C are symmetrically provided with reflector frame mounting holes 533 extending in the direction of the axis A. The position and size of the reflector frame mounting holes 533 may be different from those of the first side wall 530B and the second side wall 530C. Figure 2 The shaft hole 410 of the reflector frame 400 in the embodiment of the present invention cooperates to allow the rotation shaft 592 (see Figure 7 ) is inserted into the reflector frame mounting hole 533 and extends into the shaft hole 410, so that the reflector frame 400 can rotate around the rotation axis 592 or the axis A. The rotation axis 592 can be a single axis passing through the first side wall 530B and the second side wall 530C, or two half axes passing through the first side wall 530B and the second side wall 530C from both sides.

[0058] The slider 540 can be fixedly connected to the transmission rod 220 at the head end of the transmission rod 220 in a threaded connection mode, for example, and can move linearly with the transmission rod 220. The slider 540 can be rotatably connected to the reflector frame 400, and the transmission rod 220 can drive the reflector frame 400 to rotate through the slider 540, which will be described below. The inner surface of each of the first side wall 530B and the second side wall 530C can be formed with a slideway 534 along the length direction of the gun barrel 100 or the mounting seat 500. The slider 540 can be located in the narrow passage between the first side wall 530B and the second side wall 530C, and can be supported by the slideway 534. In this way, under the push of the transmission rod 220, the slider 540 can reciprocate linearly along the length direction of the gun barrel 100 on the slideway 534, thereby driving the reflector frame 400 to rotate. By supporting the slider 540 by the slideway 534, the stability of the transmission rod 220 and the slider 540 doing linear motion is improved. The slider 540 may have a substantially “door”-shaped cross section, and the two side walls may respectively abut against the slideways 534 of the first side wall 530B and the second side wall 530C so as to be slidably supported.

[0059] like Figure 6 As shown, the reflector frame 400 can be rotatably connected to the slider 540 between the two side walls of the door-shaped slider 540. This can be particularly referred to Figure 7 In the area indicated by reference numeral 591, the slider 540 has a vertically extending long hole through which a pin passes and extends to Figure 2 In this way, when the slider 540 and the transmission rod 220 make a lateral linear motion together, the pin can push or pull the reflector frame 400 to rotate, and the pin will move relatively vertically in the long hole of the slider 540. The two outer ends of the pin can be retained between the first side wall 530B and the second side wall 530C of the reflector frame mounting portion 530 without falling out.

[0060] As mentioned above, a connection portion 520 may be provided between the collimator mirror mounting portion 510 and the reflector frame mounting portion 530 of the mounting seat 500. The collimator mirror mounting portion 510 and the reflector frame mounting portion 530 are respectively fixedly connected to the connection portion 520 at the two ends of the connection portion 520 or are integrally formed with the connection portion 520. The connection portion 520 may be located at the lower portion of the mounting seat 500 as a whole to avoid the exit light path of the collimator mirror 330. Since the collimator mirror 330 and the reflector frame 400 are both mounted at the same mounting seat 500, by pre-designing the mounting positions of the collimator mirror 330 and the reflector frame 400 at the mounting seat 500, they can be easily aligned.

[0061] The outer contour along the circumference of the mounting seat 500 can be partially or completely matched with the inner wall shape or the inner circumferential profile of the barrel wall of the gun barrel 100, so that the mounting seat 500 can move along the length direction of the gun barrel 100 and / or rotate circumferentially in the gun barrel 100, but basically will not move or shake in the lateral direction perpendicular to the length direction of the gun barrel. The outer contour along the circumference or the circumferential outer contour mentioned here refers to the overall outer contour of the circumference when looking from the end face of the mounting seat 500, rather than the circumferential outer contour of the individual position along its length direction. The mounting seat 500 can have different shapes and profiles at each position along its length direction. For example, when the gun barrel 100 is cylindrical, the circumferential outer contour of the mounting seat 500 can be circular, and its diameter can be slightly smaller than the inner diameter of the gun barrel 100, but different parts of the mounting seat 500 can have different shapes. The outer contour of the end wall 530A of the reflector frame mounting portion 530 may be circular; the outer contours of the first side wall 530B and the second side wall 530C of the reflector frame mounting portion 530 are two arcs that are opposite and spaced apart along a diameter; the outer contours of the top and bottom of the collimator mounting portion 510 may also be two arcs that are opposite and spaced apart along a diameter, but the two arcs are arranged in a direction substantially perpendicular to the two arcs formed by the outer surfaces of the first side wall 530B and the second side wall 530C. Although different outer contours may be present at different locations, the overall circumferential outer contour of the mounting seat 500 forms a circle. At the same time, it can be understood that in other embodiments, the overall circumferential outer contour of the mounting seat 500 may only partially match the inner circumferential contour of the barrel wall of the gun barrel 100. In this case, the mounting seat 500 can still move along the length direction of the gun barrel 100 and / or rotate circumferentially in the gun barrel 100, but will basically not move or shake in the lateral direction perpendicular to the length direction of the gun barrel. This can refer to the outer contour of the collimator mounting portion 510 or the outer contours of the first side wall 530B and the second side wall 530C.

[0062] The matching of the outer circumferential contour of the mount 500 and the inner circumferential contour of the barrel wall of the gun barrel 100 described above is important for the stability and convenience of the connection between the mount and the gun barrel 100 described below.

[0063] After the components to be carried by the mounting base 500 are mounted to the predetermined positions of the mounting base 500, the mounting base 500 is basically Figure 6 As shown, they are then inserted together into a predetermined position in the barrel 100, as shown in FIG. Figure 7 After the mounting seat 500 is arranged in the gun barrel 100 , the connecting portion 520 of the mounting seat 500 can be connected to the gun barrel 100 in a rotationally-resistant manner using the key 560 .

[0064] In order to more clearly understand the connection structure between the mounting base 500 and the gun barrel 100, Figure 8 The gun barrel 100, the mounting seat 500, and the key 560 involved in the connection structure are shown separately, and the mounting seat 500 is translated vertically to the outside of the gun barrel 100, but the horizontal position relationship of each component remains unchanged. It should be understood that in the actual assembly state, the mounting seat 500 is located inside the gun barrel 100. Figure 8 As shown, the barrel wall of the gun barrel 100 may be formed with a through slot 110, and the through slot 110 passes through the barrel wall of the gun barrel 100. The connecting portion 520 of the mounting seat 500 may be formed with a key slot 522 that is recessed inward from its outer surface. In the assembled state, the key slot 522 corresponds to the position of the through slot 110. A first through hole 521 that is connected to the key slot 522 and passes through the connecting portion 520 may be formed at the bottom of the key slot 522. The key slot 522 of the mounting seat 500 and the first through hole 521 therein are Figure 4 The key slot 522 and the through slot 110 can together form a receiving space 560' for receiving the key 560, which can be seen in FIG. Figure 7 The shape of the key 560 matches the shape of the through slot 110 of the barrel 100, and the key 560 can be firmly held in the through slot 110 in the assembled state. The key 560 can have a second threaded through hole 561, and in the assembled state, the second threaded through hole 561 is substantially aligned with the first through hole 521 to receive the threaded fastener 550. The threaded fastener 550 can pass through the first through hole 521 and be screwed into the second threaded through hole 561 to form a threaded connection therewith, thereby fixing the key 560 and the mounting seat 500 to each other. In the process of connecting the key 560, a portion of the key 560 will extend into the key slot 522 of the mounting seat 500. Since the key 560 is fixedly connected to the mounting seat 500 and the key 560 is held by the through slot 110 of the gun barrel 100, the mounting seat 500 cannot move along the length direction of the gun barrel 100 or rotate along the circumferential direction due to the shape matching between the key 560 and the through slot 110. At the same time, due to the movement restriction of the mounting seat 500 by the key 560, combined with the above description of the outer contour of the mounting seat 500 and the inner contour of the gun barrel 100 and the restriction of the lateral movement of the mounting seat 500 relative to the gun barrel 100 by the contour matching therebetween, the mounting seat 500 can be firmly held in the gun barrel 100.

[0065] Figure 7 The state after the mounting base 500 is inserted into the gun barrel 100 but the key 560 has not yet been installed is shown. At this time, the key slot 522 of the mounting base 500 is aligned with the through slot 110 of the gun barrel 100, and together form a receiving space 560' to prepare to receive the key 560. The threaded fastener 550 has been set in the first through hole 521 and extends into the receiving space 560', waiting to be screwed into the second threaded through hole 561 of the key 560.

[0066] Fig. 9 and Fig.10 They are respectively a partial cross-sectional schematic diagram and a partial longitudinal section schematic diagram of the laser gun after assembly. Fig. 9 and Fig.10 As shown, the threaded fastener 550 may have an enlarged fastener head 551 and a fastener shank 552 with threads. The fastener head 551 is the first end of the threaded fastener 550, and the end of the fastener shank 552 is the second end of the threaded fastener 550 opposite to the first end. It should be noted that the engaging portion 5522 of the threaded fastener 550 for engaging a screwing tool such as a screwdriver is formed at the second end of the threaded fastener 550, that is, at the end of the fastener shank 552. Obviously, this is different from conventional fasteners. For conventional fasteners with an enlarged head, the engaging portion is usually formed at its enlarged head rather than at its thinner end. Fig. 9 In the embodiment, the engagement portion 5522 of the threaded fastener 550 is a flat groove, which is suitable for receiving a flat screwdriver. In other embodiments, the engagement portion can also be in the form of various grooves such as a cross groove or a hexagonal groove, or various shapes of protrusions, as long as it can cooperate with a screwing tool to rotate the threaded fastener 550. Figure 8 and Fig. 9 It can be seen that the first through hole 521 of the connecting portion 520 of the mounting seat 500 can have a flaring section 5211 and a constricting section 5212 along its extension direction, the lateral dimension of the flaring section 5211 is larger than the lateral dimension of the constricting section 5212, and a step portion is formed at the transition between them. The fastener head 551 of the threaded fastener 550 can be received in the flaring section 5211 and can abut against the step portion. The fastener rod 552 of the threaded fastener 550 can extend through the constricting section 5212 to extend out of the first through hole 521, and continue to extend toward the direction of the barrel 100 so as to be connected with the key 560.

[0067] refer to Figure 6 , Fig. 9 and Fig.10 In order to prevent or prevent the threaded fastener 550 from accidentally coming out of the first through hole 521 of the mounting seat 500 and falling into the gun barrel 100, a retainer 570 may be provided to retain the threaded fastener 550 in the first through hole 521. The retainer 570 may be detachably connected to the mounting seat 500. The retainer 570 may be in the shape of an elongated strip and extend laterally above the fastener head 551 of the threaded fastener 550 to limit the threaded fastener 550 from completely coming out of the first through hole 521. The connecting portion 520 of the mounting seat 500 may have a through retainer hole 523 (see Figures 3 to 5), the retainer 570 can be inserted into the retainer hole 523 and extend transversely through the flared section 5211 of the first through hole 521, thereby limiting the fastener head 551 of the threaded fastener 550 within the flared section 5211, and finally retaining the threaded fastener 550 in the first through hole 521 and preventing it from coming out. The retainer 570 can be elastic, such as a steel wire, or can be rigid. In other embodiments, the retainer 570 can also be other shapes or structures suitable for preventing the threaded fastener 550 from coming out. In other embodiments, the retainer can also extend outside the first through hole 521 above its flared section 5211. During the assembly process, the threaded fastener 550 can be inserted into the first through hole 521 first, and then the retainer 570 can be installed in place.

[0068] The working principle of the connection structure between the mounting base 500 and the gun barrel 100 is described below. Fig.12 After the threaded fastener 550 is screwed into the second threaded through hole 561 in the key 560, the mounting base 500 and the key 560 fixedly connected to each other can be regarded as an integral structure, that is, Fig.12 The structure shown. It should be understood that Fig.12 This is shown only for the purpose of illustrating the principle. In practice, during assembly, the key 560 is connected to the mount 500 after the mount 500 is inserted into the barrel 100. Fig.12 At this time, the portion of the key 560 extending out of the key slot 522 can be regarded as an outwardly extending protrusion of the overall structure. Since the protrusion will be located in the through slot 110 of the barrel 100, the shape matching between the protrusion and the through slot 110 can limit the movement of the mounting seat 500 along the length direction of the barrel 100 and the rotation around the axial direction of the barrel 100. Figures 9 to 11 See more clearly in.

[0069] Based on the above working principle, it can be known that the keyway 522 at the mounting seat 500 is not necessary. Even without the keyway 522, as long as the key 560 is fixed to the mounting seat 500 by the threaded fastener 550, and the key 560 can be inserted into the through groove 110 of the gun barrel 100, this can still play the role of limiting the movement and rotation of the mounting seat 500 relative to the gun barrel 100 as described above. However, the inventor of the present application found that if there is no keyway 522, and if it is not desired that the key 560 and the threaded fastener 550 extend out of the outer surface of the gun barrel 100 in the assembled state, the thickness of the key 560 cannot exceed the wall thickness of the gun barrel 100. In this way, when the wall of the gun barrel 100 is relatively thin, the threaded connection length or depth between the threaded fastener 550 and the key 560 will be very short, even shorter than the thickness of the key 560, which is very unfavorable for the threaded fastener 550 to firmly hold the key 560. Moreover, if there is no keyway 522, the threaded fastener 550 needs to extend into the through-slot 110 of the gun barrel 100. Therefore, even if the retainer 570 can be elastic to allow the threaded fastener 550 to temporarily retract into the inside of the gun barrel 100, the threaded fastener 550 of such a length may still form an obstacle in the process of inserting the mounting base 500 into the gun barrel 100. In view of the present inventor's discovery, it is preferred to form a keyway 522 at a position of the connecting portion 520 of the mounting base 500 corresponding to the through-slot 110 of the gun barrel 100. Since the keyway 522 accommodates the key 560, the key 560 can have a sufficient thickness, which also allows the second threaded through hole 561 therein to have a sufficient depth or length. In this way, even if the threaded fastener 550 does not extend into the through-slot 110 of the gun barrel 100, its extended portion in the keyway 522 is sufficient to form a sufficient threaded connection length with the key 560, so that the threaded fastener 550 can stably hold the key 560. The depth of the keyway 522 may be greater than the depth of the through slot 110, preferably significantly greater than the depth of the through slot 110, for example, at least 1.5 times the depth of the through slot 110. Of course, the keyway 522 may be omitted when the barrel 100 has a thicker wall, or when it is not necessary to limit the key from protruding from the outer surface of the barrel, or in other applicable situations.

[0070] The following describes the assembly process of the laser gun of the present application. First, before the mounting seat 500 is placed into the gun barrel 100, the various components to be carried are installed at the predetermined positions of the mounting seat 500. These components may include the collimator 330, the transmission rod 220 and its slider 540, the reflector frame 400, the threaded fastener 550 and its retainer 570. The structure after such assembly is as follows: Figure 6 As shown. Figure 6As can be seen in FIG. 1 , the reflector frame 400 can be temporarily rotated to a state substantially parallel to the reflector frame mounting portion 530 and within the circumferential outer contour of the reflector frame mounting portion 530 , so that the reflector frame 400 will not interfere when the mounting seat 500 is inserted into the gun barrel 100 . Next, Figure 6 The structure shown is inserted into the gun barrel 100 as a whole, and the key slot 522 of the mounting seat 500 is substantially aligned with the through slot 110 of the gun barrel 100. Figure 7 As shown. Next, the key 560 is placed into the through slot 110 of the gun barrel 100 from the outside of the gun barrel 100, and at the same time, each second threaded through hole 561 of the key 560 is aligned with the second end of each threaded fastener 550 extending outward from the bottom wall of the key slot 522. Finally, the head end of a screwdriver or other suitable screwing tool is inserted and passed through the second threaded through hole 561 of the key 560, engaging the engaging portion 5522 of the second end of the threaded fastener 550 to screw the threaded fastener 550. This will cause the threaded fastener 550 to gradually screw into the second threaded through hole 561 of the key 560 and form a threaded connection therewith. Under the interaction between the external thread of the fastener shank 552 of the threaded fastener 550 and the internal thread of the second threaded through hole 561 of the key 560, since the threaded fastener 550 is retained in the first through hole 521, the key 560 gradually moves downward or inward along the fastener shank 552 of the threaded fastener 550 into the keyway 522, forming Figures 9 to 11 In other words, in this case, it can be said that the threaded fastener 550 uses the thread between the threaded fastener 550 and the key 560 to pull the key 560 inward. When the threaded fastener 550 is initially screwed, the key 560 can be pressed by hand to help the threaded fastener 550 smoothly screw into the second threaded through hole 561 and form a threaded connection therewith.

[0071] It should be noted that in this assembly state, Fig. 9 and Fig.10 As shown, the second end of the fastener rod 552 of the threaded fastener 550 is completely located in the second threaded through hole 561 of the key 560, that is, it does not protrude from the key 560, thereby ensuring the smoothness of the exterior of the laser gun. Similarly, the thickness of the key 560 can be set so that it can be completely accommodated in the accommodation space 560' formed by the through groove 110 and the key groove 522 after assembly, and the outer surface of the key 560 is substantially flush with the outer surface of the gun barrel 100 or slightly concave, and does not protrude from the outer surface of the gun barrel 100. Fig.10In the embodiment, the portion of the key 560 that enters the key slot 522 substantially extends through the entire depth of the key slot 522, so that a sufficiently long threaded connection length is provided between the fastener shank 552 of the threaded fastener 550 and the second threaded through hole 561 of the key 560. At this time, the thickness of the key 560 may be substantially equal to or slightly less than the total depth of the key slot 522 and the through slot 110, so that the key 560 may extend through the entire key slot 522 and the through slot 110 along its thickness direction, and as shown in FIG. Fig.11 As shown, after installation, the key 560 will not protrude from the barrel 100. Of course, in other embodiments, the thickness of the key 560 may also be significantly less than the total depth of the key slot 522 and the through slot 110. In this case, when installing the key 560, it is preferred to satisfy the extension distance of the key 560 in the through slot 110 without lowering the key 560 to the bottom wall of the key slot 522.

[0072] In addition to the thickness of the key 560, another thing to be concerned about is the length of the threaded fastener 550. On the one hand, it is desirable that the threaded fastener 550 has a sufficiently long threaded connection length with the second threaded through hole 561 of the key 560, and on the other hand, it is desirable that the threaded fastener 550 does not form an obstruction when inserting the mounting seat 500 into the gun barrel 100, or protrude from the outer surface of the gun barrel 100 after the assembly is completed. In one embodiment, the length of the threaded fastener 550 can be set so that the second end of the threaded fastener 550 is substantially flush with or recessed relative to the outer surface of the gun barrel 100 in the assembled state. In this case, the constricted section 5212 of the first through hole 521 of the mounting seat 500 can be formed with threads, and before the mounting seat 500 is inserted into the gun barrel 100, the threaded fastener 550 can be threadedly connected with the constricted section 5212, and is pre-retracted, so that the second end of the threaded fastener 550 does not hinder the insertion process of the mounting seat 500. In the illustrated embodiment, the length of the threaded fastener 550 is set so that in the assembled state, the second end of the threaded fastener 550 is substantially flush with the circumferential outer contour of the mounting seat 500, so as not to affect the insertion process of the mounting seat 500 into the gun barrel 100. In other words, the length of the threaded fastener 550 is such that after extending from the first through hole 521, it can basically only extend through the entire keyway 522, and will not basically enter the through groove 110 of the gun barrel 100. Such a length of the threaded fastener 550 not only does not affect the insertion process of the mounting seat 500, but also does not extend out of the outer surface of the gun barrel 100.

[0073] The first through hole 521 of the mounting base 500 may be a non-threaded hole, but as in other embodiments described above, the first through hole 521 may also be a threaded hole, and due to the retaining effect of the threaded hole itself, the retaining member 570 described above may be omitted.

[0074] Fig.11As shown in the figure, the key 560 is long and has arcs at both ends, but in other embodiments, it can also be rectangular, circular, or special-shaped, as long as the through slot 110 and the key 560 have matching shapes.

[0075] As mentioned above, the outer circumferential contour of the mounting seat 500 cooperates with the inner circumferential contour of the barrel wall of the gun barrel 100, which prevents the mounting seat 500 from moving laterally relative to the gun barrel 100, and also helps prevent the key 560 from moving toward the inside of the gun barrel 100 and escaping from the through slot 110 of the gun barrel 100. Of course, in other embodiments, other means may be used to prevent the key 560 from escaping from the through slot 110. For example, in other embodiments, when the wall thickness of the gun barrel 100 is sufficient, a step facing outward may be formed along the circumference of the through slot 110, and the key 560 abuts against the step to prevent the key 560 from entering the gun barrel 100. In other embodiments, the mounting seat 500 is also supported by a top screw on the barrel wall of the gun barrel 100 opposite to the through slot 110, so that the key 560 cannot escaping from the through slot 110.

[0076] It should also be noted that by pre-setting the positions of the key 560, the through slot 110 of the gun barrel 100 and the key slot 522 of the mounting seat 500, when the installed laser gun is in operation, the outgoing laser reflected by the reflector M carried by the reflector frame 400 can be aligned with the light emitting slit or notch 103 at the head end of the gun barrel 100.

[0077] As proposed in the Chinese patent application “A Laser Scanning Device” with application number 2024111313696, in some harsh environments such as high temperature and high dust, an outer sleeve may be provided on the outside of the laser gun to isolate or at least avoid the influence of the furnace environment on the laser gun. The laser gun and the outer sleeve need to be frequently plugged in and out. If there is a foreign object between the two, or the outer wall of the laser gun is not smooth, a jamming phenomenon will occur, making it impossible to pull out or insert the laser gun. In the present application, after the key 560 is inserted into the through groove 110 of the gun barrel 100, the gun barrel 100 is formed into a cylindrical shape as a whole, without protrusions, and is convenient for plugging and unplugging. Moreover, the present application also utilizes the special design of the threaded fastener 550 to avoid the jamming situation that may be caused by its loosening. In the present application, even if the threaded fastener 550 is loose, it can only move toward the inside of the gun barrel 100, and will not move outward and affect the smoothness of the outside of the gun barrel 100.

[0078] The connection method between the mounting seat 500 and the gun barrel 100 described above is actually not limited to the specific case of the laser gun, but can have a more general application range. The idea of ​​this connection method can be applied to any other situation where the second component needs to be kept in the cylindrical first component. Therefore, the present application also proposes a connection structure, which may include a cylindrical first component, a second component arranged in the first component, and a key and a threaded fastener for keeping the second component in the first component. In this connection structure, the gun barrel 100 described above is actually an embodiment of the first component, and the mounting seat 500 is actually an embodiment of the second component. The structural features described above for the gun barrel 100 and the mounting seat 500 can be correspondingly applied to the first component and the second component, and the structural features described above for the key 560 and the threaded fastener 550 can also be correspondingly applied to the key and threaded fastener of the general connection structure. Further, the other features and corresponding descriptions proposed above for the connection between the mounting seat 500 and the gun barrel 100 can be applied to the general connection structure. Therefore, the general connection structure will not be repeated here.

[0079] In the laser gun proposed in the Chinese patent application “A laser scanning device” with application number 2024111313696, the transmission rod 220 and the laser transmission line 320 directly pass through the rear end wall of the barrel 100, but there is no specific description on how to install the transmission rod 220 and the laser transmission line 320. And from its technical solution, it can be seen that it opens from the head end of the barrel 100 to insert the transmission rod 220 and the laser transmission line 320. The inventor of the present application found that since the head end is located in the furnace, the poor sealing of the head end opening will cause the risk of gas leakage in the furnace, and when replacing or repairing the internal parts of the barrel 100, the laser gun needs to be pulled out as a whole for replacement, which increases the difficulty of installation and maintenance.

[0080] To solve the above problems, different from the structure proposed in the document, the present application installs the transmission rod 220, the collimator 330 and the laser transmission line 320 from the rear end of the gun barrel 100. During the installation process, since the transmission rod 220 is relatively fixed and cannot be rotated during the installation process, and the laser transmission line 320 will also be entangled and damaged if it rotates, the inventor of the present application proposes a tail end sealing assembly 600 that can seal the rear end of the gun barrel 100 without rotating the transmission rod 220 and the laser transmission line 320. At the same time, the tail end sealing assembly 600 can also provide support and lubrication for the transmission rod 220.

[0081] The tail end seal assembly 600 may include a positioning ring 610 that is detachably connected to the outer wall of the barrel 100. The positioning ring may be detachably connected to the outer wall of the barrel 100 via a thread. By rotating the positioning ring 610, the relative position of the positioning ring 610 and the barrel 100 may be adjusted. Fig.14 As shown, an annular groove 101 is provided along the circumferential direction on the outer wall of the gun barrel 100, and the positioning ring 610 can be inserted into the annular groove 101. There can be multiple annular grooves 101, so as to adjust the relative position of the positioning ring 610 and the gun barrel 100. After the positioning ring 610 is in a preset relative position, in order to prevent the position of the positioning ring 610 from moving during the subsequent installation process, a hole can be provided on the positioning ring 610 along the diameter direction, and a top screw 611 is inserted into the hole to press against the outer wall of the gun barrel 100, so as to maintain the relative position between the positioning ring 610 and the gun barrel 100.

[0082] The tail end seal assembly 600 also includes a seal cap 630. Fig.13 As shown, the sealing cap 630 is connected to the open end of the rear end of the gun barrel 100 and can locate the circumferential position of the transmission rod 220 . Fig.15 To more clearly show the structure of the sealing cap 630. Fig.15 The transmission rod 220 and the laser transmission line 320 are hidden. Fig.15 As shown, the sealing cap 630 includes a sealing cap body 631, and the sealing cap body 631 is provided with a bottom wall and an annular side wall connected to the bottom wall. The diameter of the sealing cap annular side wall is slightly larger than the outer diameter of the gun barrel 100. The annular side wall is provided with a positioning hole 634. The gun barrel 100 is provided with an elongated positioning groove 102 in the axial direction near its tail end. Fig.15 It is also shown that the sealing cap body 631 is provided with a transmission rod positioning hole 632 allowing the transmission rod 220 to penetrate and a laser transmission line installation hole 633 allowing the laser transmission line 320 to penetrate. The transmission rod positioning hole 632 can be sealed and connected with the transmission rod 220. The laser transmission line installation hole 633 can be sealed and connected with the laser transmission line 320. After the gun barrel 100 is inserted into the sealing cap body 631, a positioning member 640 such as a bolt, a screw or a top screw can be inserted into the positioning hole 634, and the tail end of the positioning member 640 is extended into the elongated positioning groove 102. At this point, the sealing cap body 631 can only move along the axial direction of the gun barrel 100 under the action of the positioning member 640 and the positioning hole 634, and cannot rotate in the circumferential direction, thereby limiting the circumferential position of the transmission rod 220 and the laser transmission line 320 installed on the sealing cap 630. The outer wall of the annular side wall of the sealing cap body 631 is provided with a third thread 635.

[0083] The tail end seal assembly 600 further includes a locking nut 620. The locking nut 620 is provided with a bottom wall and an annular side wall connected to the bottom wall. The bottom wall of the locking nut 620 is provided with a through hole allowing the barrel 100 to penetrate, and also has a contact surface that can contact the positioning ring 610. The inner wall of the side wall of the locking nut 620 is provided with a fourth thread 621 that matches the third thread 635. The diameter of the through hole in the bottom wall of the locking nut 620 is only slightly larger than the outer diameter of the barrel 100.

[0084] When installing the tail end sealing assembly 600, the transmission rod 220 can be first inserted into the transmission rod positioning hole 632, and the laser transmission line 320 can be inserted into the laser transmission line installation hole 633. Fig.15 As shown, the positioning ring 610 can be connected to the barrel 100 and fixed to a predetermined axial position. Fig.16 As shown, the sealing cap 630 is then installed from the rear end to the front end of the gun barrel 100. The annular side wall of the sealing cap body 631 surrounds the side wall of the gun barrel 100, and the rear end of the gun barrel 100 faces the bottom wall of the sealing cap body 631. Align the positioning hole 634 and the elongated positioning groove 102, and insert the positioning member 640 to fix the circumferential position of the sealing cap body 631. Fig.13 As shown, the locking nut 620 is inserted from the head end of the gun barrel 100. The locking nut 620 is rotated to connect the fourth thread 621 of the locking nut 620 with the third thread 635 of the sealing cap body 631 until the bottom wall of the locking nut 620 abuts against the positioning ring 610 and is locked with the sealing cap body 631. It can be seen from the above process that the circumferential position of the sealing cap 630 is limited by the positioning hole 634 and the elongated positioning groove 102, and the axial position is limited by the positioning ring 610, so that the position of the laser transmission line 320 and the transmission rod 220 installed to the sealing cap 630 is also limited. At the same time, during the installation process, the sealing cap 630 does not rotate, that is, during the installation process, the transmission rod 220 and the laser transmission line 320 do not rotate, and only perform axial linear motion, thereby avoiding the transmission rod 220 from being damaged due to torsion and the laser transmission line 320 from being entangled due to rotation.

[0085] like Fig.17 As shown, the sealing cap body 631 can increase the sealing performance with the gun barrel 100 through the first sealing ring 650. The bottom wall of the sealing cap body 631 can be provided with a groove for installing the first sealing ring 650. After installation, the wall at the rear end of the gun barrel 100 abuts against the first sealing ring 650, and together with the sealing cap body 631, presses the first sealing ring 650, so that the sealing cap body 631 is sealed and connected with the gun barrel 100.

[0086] The sealing cap body 631 can be sealed and connected with the transmission rod 220 through the second sealing ring 660. A groove for installing the second sealing ring 660 is arranged on the wall of the transmission rod positioning hole 632. To further increase the sealing effect, a plurality of second sealing rings 660 can be arranged. As described above, the transmission rod 220 repeats linear motion in the motion process of driving the reflector frame 400. Therefore, in order to provide lubrication for the transmission rod 220, the transmission rod positioning hole 632 can be provided with a lubricant cavity 6321 between the second sealing rings 660. Since the lubricant cavity 6321 is provided with the second sealing ring 660 on both sides, the lubricant 690 will not flow into the gun barrel 100, nor will it leak. The lubricant 690 liquid level in the lubricant cavity 6321 can be higher than the transmission rod 220, so as to play a sealing role. The gas that may exist in the gun barrel 100 is blocked by the second sealing ring 660 and the lubricant 690, so as not to leak to the outside world. In order to facilitate the addition of lubricant 690, the sealing cap body 631 may also be provided with an injection hole 6322 communicating with the outside and the lubricant cavity 6321. The injection hole 6322 may be sealed by an injection hole cover 680. Figure 18-19 As shown, the injection hole cover 680 may include an injection hole upper cover 681, a spring 682 and an injection hole lower cover 683. The injection hole upper cover 681 may be threaded or snap-fitted with the oil injection hole. The spring 682 is located between the injection hole upper cover 681 and the injection hole lower cover 683, and pushes the injection hole lower cover 683 to move toward the lubricant 690 through elastic force, thereby providing a certain pressure in the lubricant cavity 6321. This design is similar to an injection tube, and the lubricant 690 is pushed through the injection hole lower cover 683, so that the lubricant 690 wraps the transmission rod 220 at this position, thereby increasing the lubrication effect. In order to increase the sealing effect and prevent the lubricant 690 from leaking, the injection hole lower cover 683 is also provided with a third sealing ring 684, which is used to seal the gap between the side wall of the injection hole lower cover 683 and the lubricant cavity 6321.

[0087] The sealing cap body 631 can be sealed and connected to the laser transmission line 320 through the sealing sleeve 670. The sealing sleeve 670 can be cylindrical, at least a portion of which is interference-connected with the laser transmission line installation hole 633, and has a through hole 671 that allows the laser transmission line 320 to pass through. The laser transmission line 320 can be interference-connected with the through hole 671. To facilitate the installation of the injection hole cover 681, as shown in FIG. Fig. 20 As shown, a slot 6811 may be provided at the top of the injection hole upper cover 681. To prevent the spring 682 from shifting between the injection hole upper cover 681 and the injection hole lower cover 683, the injection hole upper cover 681 or / and the injection hole lower cover 683 may also be provided with a receiving groove 6831 for accommodating the end of the spring 682. Fig.21 The receiving groove 6831 of the injection hole lower cover 683 is shown.

[0088] The tail end seal assembly 600 , together with the mounting seat 500 described above, forms a support and sealing structure for various components in the gun barrel 100 .

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A laser gun, comprising: An elongated gun barrel extending in a length direction and having a head end and a tail end opposite to each other in the length direction; The barrel wall of the gun barrel is formed with a through groove, and the through groove penetrates the barrel wall; A laser transmission line for transmitting laser light, which extends from the outside of the gun barrel into the gun barrel and extends along the gun barrel toward the head end thereof; A collimator lens is arranged in the gun barrel and optically connected to the head end of the laser transmission line; a reflector frame with a reflector, arranged in the gun barrel and adjacent to the collimator; A transmission rod, extending from the outside of the gun barrel into the gun barrel, operably connected to the reflector frame, and used to drive the reflector frame to rotate; A mounting seat is arranged in the gun barrel and has a collimator mounting portion for holding the collimator and a reflector frame mounting portion for rotatably holding the reflector frame; the collimator mounting portion includes a collimator accommodating hole for receiving the collimator; the mounting seat also has a connecting portion located between the collimator mounting portion and the reflector frame mounting portion; the mounting seat is connected to the gun barrel via the connecting portion; the connecting portion is formed with a key groove recessed inwardly from its outer surface at a position corresponding to the through groove of the gun barrel, and a first through hole penetrating the connecting portion is formed in the key groove; the first through hole has a flaring section and a shrinking section along its extension direction, the lateral dimension of the flaring section is larger than the lateral dimension of the shrinking section, and a step portion is formed between the transition between the flaring section and the shrinking section; A key, which can be fixedly connected to the mounting seat, and the shape of the key matches the shape of the through slot of the barrel and is retained in the through slot, and a portion of the key also extends into the key slot of the mounting seat; the key has a second threaded through hole, and the second threaded through hole is substantially aligned with the first through hole; and A threaded fastener for connecting the key to the mounting seat, the threaded fastener having opposite first and second ends, and an engagement portion for engaging a screwing tool is formed at the second end; the threaded fastener is retained in the first through hole of the mounting seat, and the second end protrudes from the first through hole in the direction of the gun barrel; wherein the threaded fastener has a fastener head and a fastener shank with threads, the fastener head has an increased size relative to the fastener shank, the fastener head forms the first end of the threaded fastener, and the terminal portion of the fastener shank forms the second end of the threaded fastener; wherein the fastener head of the threaded fastener can be received in the flared section of the first through hole; the fastener shank of the threaded fastener extends through the narrowed section of the first through hole; When the laser gun is working, the laser from the laser transmission line is collimated by the collimator and then incident on the reflector of the reflector frame. The outgoing laser formed by reflection from the reflector is emitted along multiple different angles as the reflector frame rotates, so that the outgoing laser can perform scanning operations within a predetermined scanning angle range.

2. The laser gun according to claim 1, characterized in that: The collimator lens mounting portion has at least one top screw through hole for receiving a top screw, and the top screw through hole extends from the outer surface of the collimator lens mounting portion to the collimator lens accommodating hole, so that the top screw penetrates into the collimator lens accommodating hole to support the collimator lens and fix the collimator lens.

3. The laser gun according to claim 2, characterized in that: The at least one jackscrew through hole includes at least two jackscrew through holes extending in different directions.

4. The laser gun according to claim 1, characterized in that: The collimator mirror mounting portion is formed with a first transmission rod through hole allowing the transmission rod to pass through, and the reflector frame mounting portion is formed with a second transmission rod through hole allowing the transmission rod to pass through; wherein, the first transmission rod through hole and the second transmission rod through hole are coaxially arranged along the same straight line parallel to the length direction of the gun barrel.

5. The laser gun according to any one of claims 1 to 4, characterized in that: The reflector frame mounting portion comprises an end wall portion and a first side wall and a second side wall extending from the end wall portion; the reflector frame is rotatably arranged between the first side wall and the second side wall.

6. The laser gun according to claim 5, characterized in that: The first side wall and the second side wall of the reflector frame mounting portion are mirror-symmetrical.

7. The laser gun according to claim 5, characterized in that: It also includes a slider connected to the transmission rod, the slider is arranged between the first side wall and the second side wall, and the reflector frame is rotatably connected to the slider, and the transmission rod drives the reflector frame to rotate through the slider.

8. The laser gun according to claim 7, characterized in that: The inner surfaces of the first side wall and the second side wall of the reflector frame mounting portion are respectively formed with slideways for supporting the slider, and the slider can move linearly along the length direction of the gun barrel on the slideways.

9. The laser gun according to claim 8, characterized in that: The slider is substantially door-shaped, and the two side walls of the slider are slidably supported on the first side wall and the second side wall of the reflector frame mounting portion respectively; the reflector frame is rotatably connected to the slider between the two side walls of the slider.

10. The laser gun according to claim 1, characterized in that: During assembly, the second threaded through hole of the key is aligned with the second end of the threaded fastener outside the gun barrel, and the screwing tool is passed through the second threaded through hole of the key to engage with the engaging portion of the threaded fastener; the screwing tool screws the threaded fastener using the engaging portion, so that the threaded fastener is gradually screwed into the second threaded through hole of the key and forms a threaded connection with the second threaded through hole.

11. The laser gun according to claim 1, characterized in that: At least a portion of the circumferential outer contour of the mounting seat matches the inner circumferential contour of the barrel wall of the gun barrel to prevent the mounting seat from moving laterally in the gun barrel along a direction perpendicular to the length direction of the gun barrel.

12. The laser gun according to claim 1, characterized in that: In the assembled state, the portion of the key extends through the full depth of the keyway.

13. The laser gun according to claim 1, characterized in that: In the assembled state, the outer surface of the key is substantially flush or recessed relative to the outer surface of the barrel, and the length of the threaded fastener is set so that the second end of the threaded fastener is substantially flush or recessed relative to the outer surface of the barrel in the assembled state.

14. The laser gun according to claim 1, characterized in that: The length of the threaded fastener is set so that the second end of the threaded fastener is substantially flush with the circumferential outer contour of the mounting seat in the assembled state.

15. The laser gun according to claim 1, characterized in that: Also included is a retaining member connected to the mounting seat and extending transversely relative to the first through hole outside or inside the first through hole to retain the threaded fastener in the first through hole.

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