High-precision high-stability focusing mechanism

Abstract

The utility model discloses a focusing mechanism with high precision and high stability, which comprises a focusing transmission assembly, a focusing support assembly, a focusing carriage assembly and four slide rails, the focusing transmission assembly is arranged on the upper wall of the focusing support assembly, the focusing carriage assembly is arranged on the inner side of the focusing support assembly, and the four slide rails are arranged on the upper wall of the focusing support assembly. The four sliding rails are all arranged between the focusing sliding frame assembly and the focusing supporting assembly, the fixed ends of the four sliding rails are all installed on the side wall of the focusing supporting assembly, the sliding ends of the four sliding rails are all installed on the side wall of the focusing sliding frame assembly, and the focusing sliding frame assembly can slide on the inner side of the focusing supporting assembly through the sliding rails. According to the device, the focusing transmission assembly drives the focusing carriage assembly to move, the focusing carriage assembly drives the focal plane of an external camera to move, so that the purpose of focusing the camera is achieved, and meanwhile, the device adopts the design of four sliding rails, so that the adjusting carriage assembly is more stable in sliding.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera focusing technical field, concretely is a kind of high-precision high stability focusing mechanism. BACKGROUND

[0002] Camera focusing refers to adjusting the focal length of the lens to change the sharpness and angle of view of the shot. Focusing is achieved by changing the distance between the optical center of the lens and the photosensitive element, which directly affects the sharpness and angle of view of the picture. The longer the focal length, the narrower the angle of view, and the closer the picture looks. The shorter the focal length, the wider the angle of view, and the more things can be accommodated in the picture.

[0003] However, similar products on the market generally have problems such as unstable focusing and insufficient precision, so a high-precision and high-stability focusing mechanism is needed. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of high-precision high stability focusing mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of high-precision high stability focusing mechanism, including focusing transmission assembly, focusing support assembly, focusing carriage assembly and slide rail, the upper wall of focusing support assembly is provided with focusing transmission assembly, the inner side of focusing support assembly is provided with focusing carriage assembly, the slide rail is provided with four, four The slide rails are all arranged between focusing carriage assembly and focusing support assembly, the fixed end of four slide rails is all installed in the side wall of focusing support assembly, the sliding end of four slide rails is all installed in the side wall of focusing carriage assembly, focusing carriage assembly can slide in the inner side of focusing support assembly through slide rail.

[0006] The side wall of the focusing support assembly is provided with a camera mounting hole, and the focusing support assembly is connected with the external camera body through the camera mounting hole. The side wall of the focusing carriage assembly is provided with a focal plane mounting hole, and the focusing carriage assembly is connected with the external camera focal plane through the focal plane mounting hole.

[0007] Preferably, the focusing transmission assembly includes a worm box, a worm, a motor bracket and a motor, the worm box is installed at the center position above the focusing support assembly, the inner wall of the worm box is rotatably installed with the worm, the side wall of the worm box is installed with the motor bracket, the upper wall of the motor bracket is installed with the motor, the motor is electrically connected with the external power supply, and the output end of the motor is connected with the worm through the side wall of the worm box.

[0008] Preferably, the focusing support assembly comprises a focusing support frame, a let go slot, a lead screw, a worm gear and a lead screw nut, the worm gear box is installed at the center of the upper wall of the focusing support frame, the upper wall of the focusing support frame is provided with a let go slot, the let go slot is arranged below the worm gear box, the lead screw is rotatably installed in the let go slot, the outer wall of the lead screw is provided with a worm gear, the worm gear is connected with the worm gear, the outer wall of the lead screw is provided with a lead screw nut, the lead screw nut can slide on the lead screw, the lead screw nut is connected with the upper wall of the focusing slide frame assembly through bolts, and the camera mounting hole is arranged in the side wall of the focusing support frame.

[0009] Preferably, the focusing slide frame assembly comprises a slide frame body, a focal plane mounting hole and a through slot, the slide frame body is slidably installed on the side wall of the focusing support frame through a slide rail, the side wall of the slide frame body is provided with a focal plane mounting hole, the external camera focal plane is installed on the side wall of the slide frame body through the focal plane mounting hole, the side wall of the slide frame body is provided with a through slot, and the through slot corresponds to the position of the external camera focal plane.

[0010] Preferably, the upper wall of the focusing support frame is provided with a grating ruler probe assembly, the grating ruler probe assembly comprises a grating ruler support, a grating ruler and a reading head, the grating ruler support is inserted and installed on the upper wall of the focusing support frame, the upper wall of the grating ruler support is provided with a grating ruler, the detection end of the grating ruler is arranged above the slide frame body, the reading head is arranged above the grating ruler, and the reading head is electrically connected with the grating ruler.

[0011] Preferably, the inner wall of the focusing support frame is provided with a Hall element, and the upper wall of the slide frame body is provided with a magnetic steel, the position of the magnetic steel corresponds to the position of the Hall element.

[0012] Preferably, the upper wall of the focusing support frame is provided with a limiting slot, the limiting slot is provided with two limiting slots, the limiting slots are arranged on the left and right sides of the let go slot, the upper wall of the slide frame body is provided with a positioning pin, the positioning pin is provided with two positioning pins, the positioning pins can be respectively inserted into the limiting slots, and the positioning pin can slide in the limiting slot.

[0013] Preferably, the positioning pin comprises a pin body, an annular sliding groove and a wear-resistant sleeve, the pin body is installed on the upper wall of the slide frame body, the outer wall of the pin body is provided with an annular sliding groove, the wear-resistant sleeve is rotatably installed in the annular sliding groove, and the wear-resistant sleeve can be attached to the inner wall of the limiting slot.

[0014] Preferably, the upper wall of the slide frame body is provided with a limiting rod, the limiting rod is provided with two limiting rods, the limiting rods can be respectively inserted into the limiting slots, and the limiting rod can slide in the limiting slot.

[0015] Preferably, the limiting rod comprises a main rod body, a groove, a connecting hole, a secondary rod body and a convex rod, the main rod body is installed on the upper wall of the slide frame body, the left and right side walls of the main rod body are both provided with a groove, the upper and lower side walls of the two grooves are both provided with a connecting hole, the upper and lower ends of the secondary rod body are both installed with a convex rod, and the convex rod can be inserted into the connecting hole.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The device moves the focusing slide frame assembly through the focusing transmission assembly, moves the external camera focal plane through the focusing slide frame assembly, and thus achieves the purpose of focusing the camera.

[0018] In addition, the device is also provided with a grating ruler probe assembly and a Hall element on the focusing support frame, and the sliding of the focusing slide frame assembly is controlled by the motor, so that the sliding distance of the slide frame body can be accurately controlled, and the focusing accuracy of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model.

[0020] Figure 2 It is a side view structural schematic view of the utility model.

[0021] Figure 3 It is a top view structural schematic view of the utility model.

[0022] Figure 4 It is a focusing support frame bottom view of the utility model.

[0023] Figure 5 It is a positioning pin structural schematic view of the utility model.

[0024] Figure 6 It is a limiting rod structural schematic view of the utility model.

[0025] In the drawing: 1 focusing transmission assembly, 2 focusing support assembly, 3 focusing slide frame assembly, 4 slide rail, 5 camera mounting hole, 7 grating ruler probe assembly, 8 Hall element, 9 magnetic steel, 10 limiting groove, 11 worm box, 12 worm, 13 motor support, 14 motor, 15 positioning pin, 16 limiting rod, 21 focusing support frame, 22 let go of the slot, 23 lead screw, 24 worm wheel, 25 lead screw nut, 31 slide frame body, 32 focal plane mounting hole, 33 through slot, 71 grating ruler support, 72 grating ruler, 73 reading head, 151 pin body, 152 annular sliding groove, 153 wear sleeve, 161 main rod body, 162 groove, 163 connecting hole, 164 secondary rod body, 165 convex rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0027] Please refer to Figures 1-5 The utility model provides first technical scheme: a kind of high-precision high stability focusing mechanism, including focusing transmission assembly 1, focusing support assembly 2, focusing carriage assembly 3 and slide rail 4, focusing support assembly 2 is installed with focusing transmission assembly 1 on upper wall, focusing support assembly 2 is provided with focusing carriage assembly 3 in inside, four are provided in slide rail 4, four slide rail 4 are all arranged between focusing carriage assembly 3 and focusing support assembly 2, the fixed end of four slide rail 4 is all installed in the side wall of focusing support assembly 2, the sliding end of four slide rail 4 is all installed in the side wall of focusing carriage assembly 3, focusing carriage assembly 3 can slide in the inside of focusing support assembly 2 by slide rail 4;

[0028] In the device, four groups of slide rails 4 are used, two groups of slide rails 4 are arranged on the left and right sides of the focusing carriage assembly 3, and the other two groups are arranged above the focusing carriage assembly 3, so as to improve the stability and accuracy of the focusing carriage assembly 3 during sliding, and avoid shaking of the focusing carriage assembly 3 during sliding.

[0029] The side wall of the focusing support assembly 2 is provided with a camera mounting hole 5, and the focusing support assembly 2 is connected with the external camera body through the camera mounting hole 5. The side wall of the focusing carriage assembly 3 is provided with a focal plane mounting hole 32, and the focusing carriage assembly 3 is connected with the external camera focal plane through the focal plane mounting hole 32.

[0030] After the device is installed on the external camera through the camera mounting hole 5 and the focal plane mounting hole 32, when focusing the camera is needed, the motor 14 in the focusing transmission assembly 1 can be controlled to drive the worm 12 to rotate, then the worm 12 and the worm gear 24 are matched to drive the lead screw 23 to rotate, then the lead screw nut 24 on the lead screw 23 is driven to slide by the lead screw 23, and then the sliding frame body 31 and the camera focal plane above are driven to slide by the lead screw nut 24, to complete the focusing of the camera.

[0031] Specifically, the focusing transmission assembly 1 comprises a worm box 11, a worm 12, a motor support 13 and a motor 14, the worm box 11 is installed at the center position above the focusing support assembly 2, the inner side wall of the worm box 11 is rotatably installed with the worm 12, the side wall of the worm box 11 is installed with the motor support 13, the upper wall of the motor support 13 is installed with the motor 14, the motor 14 is electrically connected with an external power supply, and the output end of the motor 14 penetrates through the side wall of the worm box 11 and is connected with the worm 12;

[0032] The motor 14 in the present application can drive the worm 12 to rotate, and then drive the screw nut 25 and the focusing slide assembly 3 to move through the cooperation of the worm 12 and the worm gear 24 outside the screw rod 23, so as to realize the accurate control of the sliding distance.

[0033] Specifically, the focusing support assembly 2 comprises a focusing support frame 21, a let-in slot 22, a screw rod 23, a worm gear 24 and a screw nut 25, the worm box 11 is installed at the center position above the focusing support frame 21, the upper wall of the focusing support frame 21 is provided with the let-in slot 22, the let-in slot 22 is arranged below the worm box 11, the screw rod 23 is rotatably installed in the let-in slot 22, the outer side wall of the screw rod 23 is installed with the worm gear 24, the worm gear 24 is meshed and connected with the worm 12, the outer side of the screw rod 23 is installed with the screw nut 25, the screw nut 25 can slide on the screw rod 23, the screw nut 25 is bolted with the upper wall of the focusing slide assembly 3, and the camera mounting hole 5 is arranged in the side wall of the focusing support frame 21;

[0034] Under the driving of the screw nut 25, the slide body 31 can slide back and forth in the inner side of the focusing support frame 21, so as to adjust the distance between the camera and the focal plane, so as to achieve the purpose of focusing, and the slide rail 4 is arranged outside the slide body 31, so that the slide body 31 is more stable when sliding, and the shaking condition is avoided.

[0035] Specifically, the focusing slide assembly 3 comprises a slide body 31, a focal plane mounting hole 32 and a through slot 33, the slide body 31 is slidably installed on the side wall of the focusing support frame 21 through the slide rail 4, the side wall of the slide body 31 is provided with the focal plane mounting hole 32, the external camera focal plane is installed on the side wall of the slide body 31 through the focal plane mounting hole 32, the side wall of the slide body 31 is provided with the through slot 33, and the through slot 33 corresponds to the position of the external camera focal plane;

[0036] The camera focal plane is installed on the slide body 31 through bolts and other fasteners, and when the slide body 31 slides, the camera focal plane can be driven to move, so as to adjust the focal length.

[0037] Specifically, the upper wall of the focusing support frame 21 is provided with a grating ruler probe assembly 7, which comprises a grating ruler bracket 71, a grating ruler 72 and a reading head 73. The grating ruler bracket 71 is inserted and mounted on the upper wall of the focusing support frame 21. The grating ruler 72 is mounted on the upper wall of the grating ruler bracket 71. The detection end of the grating ruler 72 is arranged above the slide body 31. The reading head 73 is mounted above the grating ruler 72 and is electrically connected with the grating ruler 72.

[0038] The grating ruler 72 can monitor the moving distance of the slide body 31 in real time, and the reading head 73 above the grating ruler 72 can display the reading measured by the grating ruler 72 in real time.

[0039] Specifically, the inner side wall of the focusing support frame 21 is provided with a Hall element 8, and the upper wall of the slide body 31 is provided with a magnetic steel 9, which corresponds to the position of the Hall element 8.

[0040] The Hall element 8 is a Hall sensor in this embodiment, which monitors the position of the magnetic steel 9 and limits the extreme positions of the slide body 31 at both ends when the slide body 31 slides, so as to avoid excessive sliding of the slide body 31.

[0041] Specifically, the upper wall of the focusing support frame 21 is provided with a limiting groove 10, and the limiting groove 10 is provided with two limiting grooves 10 arranged on the left and right sides of the limiting groove 22. The upper wall of the slide body 31 is provided with a positioning pin 15, and the positioning pin 15 is provided with two positioning pins 15 which can be inserted into the two limiting grooves 10 respectively. The positioning pin 15 can slide in the limiting groove 10.

[0042] The positioning pin 15 can cooperate with the Hall element 8 to limit the sliding distance of the slide body 31, so as to avoid excessive sliding of the slide body 31.

[0043] Specifically, the positioning pin 15 comprises a pin body 151, an annular sliding groove 152 and a wear-resistant sleeve 153. The pin body 151 is mounted on the upper wall of the slide body 31. The outer side wall of the pin body 151 is provided with the annular sliding groove 152. The wear-resistant sleeve 153 is rotatably mounted in the annular sliding groove 152. The wear-resistant sleeve 153 can be attached to the inner wall of the limiting groove 10.

[0044] Because the positioning pin 15 will generate friction with the limiting groove 10 during sliding, in order to avoid excessive wear of the positioning pin 15 and cause the sliding distance of the slide body 31 to change, the wear-resistant sleeve 153 is arranged on the outer side of the pin body 151. The wear-resistant sleeve 153 contacts with the limiting groove 10, thereby improving the wear resistance of the positioning pin 15.

[0045] Working principle: after the device is installed on the external camera through the camera mounting hole 5, the focal plane mounting hole 32, when the camera needs to be focused, the motor 14 in the focusing transmission assembly 1 is controlled to drive the worm 12 to rotate, then through the cooperation between the worm 12 and the worm wheel 24, the lead screw 23 is driven to rotate, then through the lead screw 23, the lead screw nut 24 on the lead screw 23 is driven to slide, then through the lead screw nut 24, the sliding frame main body 31 and the camera focal plane above are driven to slide, and the focusing of the camera is completed.

[0046] Please refer to Figure 1 、 2 , 3, 6, the utility model provides first kind technical scheme: a kind of high-precision high stability focusing mechanism, including focusing transmission assembly 1, focusing support assembly 2, focusing carriage assembly 3 and slide rail 4, focusing support assembly 2 is equipped with focusing transmission assembly 1 on upper wall, focusing support assembly 2 is provided with focusing carriage assembly 3 in inside, slide rail 4 is equipped with four, four slide rails 4 are all arranged between focusing carriage assembly 3 and focusing support assembly 2, the fixed end of four slide rails 4 is all installed in the side wall of focusing support assembly 2, the sliding end of four slide rails 4 is all installed in the side wall of focusing carriage assembly 3, focusing carriage assembly 3 can slide in the inside of focusing support assembly 2 by slide rail 4;

[0047] The side wall of focusing support assembly 2 is provided with camera mounting hole 5, focusing support assembly 2 is connected with external camera main body by camera mounting hole 5, the side wall of focusing carriage assembly 3 is provided with focal plane mounting hole 32, focusing carriage assembly 3 is connected with external camera focal plane by focal plane mounting hole 32.

[0048] Specifically, focusing transmission assembly 1 includes worm box 11, worm 12, motor bracket 13 and motor 14, worm box 11 is installed at the center position above focusing support assembly 2, worm 12 is rotatably installed on the inner side wall of worm box 11, motor bracket 13 is installed on the side wall of worm box 11, motor 14 is installed on the upper wall of motor bracket 13, motor 14 is electrically connected with external power supply, and the output end of motor 14 penetrates the side wall of worm box 11 and is connected with worm 12.

[0049] Specifically, focusing support assembly 2 includes focusing support frame 21, let-place slot 22, lead screw 23, worm wheel 24 and lead screw nut 25, worm box 11 is installed at the center position above focusing support frame 21, let-place slot 22 is provided on the upper wall of focusing support frame 21, let-place slot 22 is arranged below worm box 11, lead screw 23 is rotatably installed in let-place slot 22, worm wheel 24 is installed on the outer side wall of lead screw 23, worm wheel 24 is engagedly connected with worm 12, lead screw nut 25 is installed on the outer side of lead screw 23, lead screw nut 25 can slide on lead screw 23, lead screw nut 25 is connected with the upper wall of focusing carriage assembly 3 by bolt, and camera mounting hole 5 is provided on the side wall of focusing support frame 21.

[0050] Specifically, the focusing slide assembly 3 comprises a slide body 31, a focal plane mounting hole 32 and a through groove 33, the slide body 31 is slidingly installed on the side wall of the focusing support frame 21 through the slide rail 4, the side wall of the slide body 31 is provided with the focal plane mounting hole 32, the external camera focal plane is installed on the side wall of the slide body 31 through the focal plane mounting hole 32, and the side wall of the slide body 31 is provided with the through groove 33, which corresponds to the position of the external camera focal plane.

[0051] Specifically, the upper wall of the focusing support frame 21 is provided with the grating ruler probe assembly 7, the grating ruler probe assembly 7 comprises a grating ruler support 71, a grating ruler 72 and a reading head 73, the grating ruler support 71 is insertedly installed on the upper wall of the focusing support frame 21, the upper wall of the grating ruler support 71 is provided with the grating ruler 72, the detection end of the grating ruler 72 is arranged above the slide body 31, and the reading head 73 is installed above the grating ruler 72 and electrically connected with the grating ruler 72.

[0052] Specifically, the inner side wall of the focusing support frame 21 is provided with the Hall element 8, and the upper wall of the slide body 31 is provided with the magnetic steel 9, which corresponds to the position of the Hall element 8.

[0053] Specifically, the upper wall of the slide body 31 is provided with the limiting rod 16, and the two limiting rods 16 can be respectively inserted into the two limiting grooves 10 and can slide in the limiting grooves 10.

[0054] Specifically, the limiting rod 16 comprises a main rod body 161, a groove 162, a connecting hole 163, a secondary rod body 164 and a convex rod 165, the main rod body 161 is installed on the upper wall of the slide body 31, the left and right side walls of the main rod body 161 are provided with the grooves 162, the upper and lower side walls of the two grooves 162 are provided with the connecting holes 163, the upper and lower ends of the secondary rod body 164 are provided with the convex rods 165, and the convex rods 165 can be insertedly installed in the connecting holes 163.

[0055] By arranging the grooves 162 on the two sides of the main rod body 161 and arranging the secondary rod body 164 which can rotate in the grooves 162, the secondary rod body 164 is in contact with the inner wall of the limiting groove 10, and the secondary rod body 164 is in rolling contact with the inner wall of the limiting groove 10 when the slide body 31 slides, so that the friction between the two can be reduced, thereby avoiding the phenomenon of excessive wear of the limiting rod 16 and the situation of excessive sliding of the slide body 31.

[0056] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0057] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A high-precision and high-stability focusing mechanism, comprising a focusing transmission assembly (1), a focusing support assembly (2), a focusing carriage assembly (3), and a slide rail (4), characterized in that: The upper wall of the focusing support assembly (2) is equipped with a focusing transmission assembly (1), and the inner side of the focusing support assembly (2) is provided with a focusing carriage assembly (3). There are four slide rails (4). The four slide rails (4) are all located between the focusing carriage assembly (3) and the focusing support assembly (2). The fixed ends of the four slide rails (4) are all installed on the side wall of the focusing support assembly (2), and the sliding ends of the four slide rails (4) are all installed on the side wall of the focusing carriage assembly (3). The focusing carriage assembly (3) can slide inside the focusing support assembly (2) through the slide rails (4). The side wall of the focusing support assembly (2) is provided with a camera mounting hole (5), and the focusing support assembly (2) is connected to the external camera body through the camera mounting hole (5). The side wall of the focusing slide assembly (3) is provided with a focal plane mounting hole (32), and the focusing slide assembly (3) is connected to the external camera focal plane through the focal plane mounting hole (32).

2. The high-precision, high-stability focusing mechanism according to claim 1, characterized in that: The focusing transmission assembly (1) includes a worm gear box (11), a worm (12), a motor bracket (13), and a motor (14). The worm gear box (11) is installed at the center above the focusing support assembly (2). The worm (12) is rotatably mounted on the inner side wall of the worm gear box (11). The motor bracket (13) is mounted on the side wall of the worm gear box (11). The motor (14) is mounted on the upper wall of the motor bracket (13). The motor (14) is electrically connected to an external power source. The output end of the motor (14) passes through the side wall of the worm gear box (11) and is connected to the worm (12).

3. The high-precision, high-stability focusing mechanism according to claim 2, characterized in that: The focusing support assembly (2) includes a focusing support frame (21), a clearance groove (22), a lead screw (23), a worm gear (24), and a lead screw nut (25). The worm gear box (11) is installed at the center above the focusing support frame (21). The upper wall of the focusing support frame (21) is provided with a clearance groove (22). The clearance groove (22) is located below the worm gear box (11). The lead screw (23) is rotatably installed in the clearance groove (22). The outer wall of the lead screw (23) is provided with a worm gear (24). The worm gear (24) is meshed with the worm (12). The outer side of the lead screw (23) is provided with a lead screw nut (25). The lead screw nut (25) can slide on the lead screw (23). The lead screw nut (25) is connected to the upper wall of the focusing slide assembly (3) by bolts. The camera mounting hole (5) is opened on the side wall of the focusing support frame (21).

4. The high-precision, high-stability focusing mechanism according to claim 3, characterized in that: The focusing carriage assembly (3) includes a carriage body (31), a focal plane mounting hole (32), and a through groove (33). The carriage body (31) is slidably mounted on the side wall of the focusing support frame (21) via a slide rail (4). The side wall of the carriage body (31) is provided with a focal plane mounting hole (32). The focal plane of the external camera is mounted on the side wall of the carriage body (31) through the focal plane mounting hole (32). The side wall of the carriage body (31) is provided with a through groove (33), and the through groove (33) corresponds to the position of the focal plane of the external camera.

5. The high-precision, high-stability focusing mechanism according to claim 4, characterized in that: The upper wall of the focusing support frame (21) is equipped with a grating ruler probe assembly (7). The grating ruler probe assembly (7) includes a grating ruler bracket (71), a grating ruler (72), and a reading head (73). The grating ruler bracket (71) is inserted into and installed on the upper wall of the focusing support frame (21). The grating ruler (72) is installed on the upper wall of the grating ruler bracket (71). The detection end of the grating ruler (72) is located above the carriage body (31). The reading head (73) is installed above the grating ruler (72). The reading head (73) is electrically connected to the grating ruler (72).

6. The high-precision, high-stability focusing mechanism according to claim 5, characterized in that: Hall elements (8) are installed on the inner wall of the focusing support frame (21), and magnets (9) are installed on the upper wall of the carriage body (31). The positions of the magnets (9) and the Hall elements (8) are corresponding.

7. A high-precision, high-stability focusing mechanism according to claim 6, characterized in that: The upper wall of the focusing support frame (21) is provided with a limiting groove (10). There are two limiting grooves (10), which are respectively located on the left and right sides of the clearance groove (22). The upper wall of the slide body (31) is equipped with a positioning pin (15). There are two positioning pins (15), which can be inserted into the two limiting grooves (10) respectively. The positioning pins (15) can slide in the limiting grooves (10).

8. A high-precision, high-stability focusing mechanism according to claim 7, characterized in that: The positioning pin (15) includes a pin body (151), an annular groove (152) and a wear-resistant sleeve (153). The pin body (151) is installed on the upper wall of the carriage body (31). An annular groove (152) is provided on the outer side wall of the pin body (151). The wear-resistant sleeve (153) is rotatably installed in the annular groove (152). The wear-resistant sleeve (153) can fit against the inner wall of the limiting groove (10).

9. A high-precision, high-stability focusing mechanism according to claim 7, characterized in that: The upper wall of the slide body (31) is equipped with a limiting rod (16). There are two limiting rods (16). The two limiting rods (16) can be inserted into the two limiting grooves (10) respectively, and the limiting rods (16) can slide in the limiting grooves (10).

10. A high-precision, high-stability focusing mechanism according to claim 9, characterized in that: The limiting rod (16) includes a main rod body (161), a groove (162), a connecting hole (163), a secondary rod body (164), and a protruding rod (165). The main rod body (161) is installed on the upper wall of the slide body (31). Grooves (162) are provided on both the left and right side walls of the main rod body (161). Connecting holes (163) are provided on the upper and lower side walls of the two grooves (162). Protruding rods (165) are installed at both the upper and lower ends of the secondary rod body (164). The protruding rods (165) can be inserted into the connecting holes (163).

Images