A rotating hub type automatic focusing lens

Abstract

The present invention relates to a hub type automatic focusing lens, comprising a main mirror seat, an upper cover, a hub assembly, a motor assembly, a field of view positioning assembly and a limit switch, wherein the hub assembly and the motor assembly are both arranged in the main mirror seat, the upper cover is fixedly connected to one side of the main mirror seat, the limit switch is fixedly connected to the inner side of the upper cover, the motor assembly drives the hub assembly to rotate to 0° or 90°, the hub assembly is also provided with a trigger device for colliding and triggering the limit switch to stop the motor assembly, and the field of view positioning assembly is arranged on one side of the main mirror seat and is used to lock the hub assembly when it rotates to 0° or 90°. Beneficial effects: fast focusing speed and good optical axis consistency. The manufacturing and installation process requirements are relatively low, meeting the requirements of mass production. The azimuth direction is changed only by interactive transformation between the two positions of 0° and 90°, and the switching speed is extremely fast, meeting the requirements of fastness and maneuverability.

Description

Technical Field

[0001] The invention relates to an optical device, in particular to a rotating hub type automatic focusing lens. Background Art

[0002] With the development of optomechanical technology, the lens is required to be able to focus automatically. The traditional focusing methods are: (1) threaded engagement type, the transmission method is simple, but the friction is large and the matching accuracy is low, which cannot be used in occasions with high requirements for optical axis consistency; (2) linear focusing type, the rolling linear guide has low friction resistance, low driving power, high positioning accuracy and repeat positioning accuracy; the main lens barrel and focusing barrel are precisely matched and have a large contact area, so the friction resistance is large during movement, and a motor with a large safety factor must be selected to meet the driving requirements; its assembly accuracy requirements are high and relatively cumbersome, resulting in great difficulty in batch production; (3) cam mechanism type, the structure of the cam mechanism is relatively simple, but the processing requirements of the cam curve are high, and batch production is difficult. At the same time, because the limit pin moves in the curved groove, the speed is low, and the field of view switching time is slightly long, which cannot meet the requirements of speed and maneuverability. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a rotating hub type automatic focusing lens to solve the above-mentioned problem.

[0004] The technical solution of the present invention for solving the above technical problems is as follows: a hub-type automatic focusing lens, comprising a main mirror seat, an upper cover, a hub assembly, a motor assembly, a field of view positioning assembly and a limit switch, wherein the hub assembly and the motor assembly are both arranged in the main mirror seat, the upper cover is fixedly connected to one side of the main mirror seat, the limit switch is fixedly connected to the inner side of the upper cover, the motor assembly drives the hub assembly to rotate to 0° or 90°, the hub assembly is also provided with a trigger device for colliding and triggering the limit switch to stop the motor assembly, and the field of view positioning assembly is arranged on one side of the main mirror seat and is used to lock the hub assembly when it rotates to 0° or 90°.

[0005] The beneficial effects of the present invention are: fast focusing speed and good optical axis consistency. It does not require precise matching processing of large and small lens barrels, and has low requirements for manufacturing and installation processes, meeting the requirements of mass production. The rotary hub focusing does not move the lens in the direction of the optical axis, but only realizes the change of azimuth direction by interactive transformation at 0° and 90°. The switching speed is extremely fast, meeting the requirements of speed and maneuverability. The focusing speed is extremely fast, and the motor drives the gear and cam mechanism. The lens position is only interactively transformed at 0° and 90° to achieve extremely fast field of view switching, and the maneuverability is strong. The optical axis has good consistency, and the field of view switching only requires accuracy at 0° and 90° to complete a high-consistency optical axis. The error caused by the intermediate transmission link is omitted, the precision requirements for parts are not high, and the processability is greatly improved.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the hub assembly includes a hub mirror seat, an optical component, an upper shaft, a lower shaft, a field of view positioning piece, a transmission adjustment gasket and a cam gear; the optical component is provided with two and is symmetrically distributed on both sides of the hub mirror seat, each of the optical components includes an optical lens group and an optical adjustment gasket, each pair of the optical adjustment gasket and the optical lens group are sequentially stacked and fixedly connected to one side of the hub mirror seat; the upper shaft and the lower shaft are coaxially fixedly connected to the top and bottom of the hub mirror seat, respectively, the field of view positioning piece, the transmission adjustment gasket and the cam gear are sequentially and coaxially sleeved on the lower shaft from top to bottom and they all rotate synchronously with the lower shaft, and the upper shaft and the lower shaft are respectively rotatably connected to the middle of the upper cover and the bottom of the main mirror seat.

[0008] The beneficial effect of adopting the above further scheme is that the upper shaft and the lower shaft are rotatably connected to the middle part of the upper cover and the bottom of the main mirror seat respectively, so that the rotating hub mirror seat can be rotated in the main mirror seat to adjust the viewing angle of the optical lens group, the transmission adjustment gasket can adjust the position of the field of view positioning piece and the cam gear on the lower shaft to achieve the best transmission effect, and the optical adjustment gasket can adjust the position of the two optical lens groups on the rotating hub mirror seat to achieve the best viewing angle position.

[0009] Furthermore, the trigger device includes a limit switch collision block, which is fixedly connected to the top of the rotating hub mirror seat. When the rotating hub mirror seat rotates to 0° or 90°, the limit switch collision block hits the limit switch.

[0010] The beneficial effect of adopting the above further solution is that when the hub mirror seat rotates to 0° or 90°, the limit switch collision block hits the limit switch, and the control system controls the motor to stop working to avoid overtravel or collision damage to components.

[0011] Furthermore, a cam is fixedly connected to the bottom of the cam gear.

[0012] The beneficial effect of adopting the above further solution is that the cam rotates synchronously with the cam gear, and the cam can lift the top block to make it move in a direction close to the fixed plate to drive the positioning block to disengage from the limiting groove.

[0013] Furthermore, the field of view positioning member is cylindrical, and two limiting grooves are provided on the outer circumference of the field of view positioning member, and the symmetry center lines of the two limiting grooves are perpendicular to each other.

[0014] The beneficial effect of adopting the above further solution is that the two limit grooves are exactly 90° apart, and when the rotating hub mirror seat is rotated to 0° or 90°, the positioning block can be accurately embedded in the limit groove.

[0015] Furthermore, the motor assembly includes a motor seat, a motor, a driving gear, a driven gear and a driven shaft, the motor seat is fixedly connected to the main mirror seat, the motor is fixedly connected to one side of the motor seat and its motor shaft passes through the motor seat, the driving gear is fixedly connected to the motor shaft of the motor, the driven shaft is arranged parallel to the motor shaft of the motor and is rotatably connected to the motor seat, the driven gear is fixedly connected to the driven shaft, and the driven gear is respectively engaged with the driving gear and the cam gear.

[0016] The beneficial effect of adopting the above further scheme is that the motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear then drives the cam gear to rotate, thereby driving the entire hub assembly to rotate, and the gear transmission is accurate, stable and has a long service life.

[0017] Furthermore, the field of view positioning assembly includes a fixed plate, a pin shaft, a top block, a roller and a positioning block, the fixed plate is fixedly connected to one side of the main mirror seat, the pin shaft passes through the fixed plate and the main mirror seat in sequence and can move along its own central axis to approach or move away from the field of view positioning piece, the positioning block matches the limiting groove and is fixedly connected to the extending end of the pin shaft, one end of the top block is rotatably connected to the roller, one side of the top block is fixedly connected to the outer periphery of the pin shaft, and also includes a spring, one end of the spring is fixedly connected to the other end of the top block, and the other end of the spring is fixedly connected to the fixed plate, and the elastic force of the spring ensures that the roller abuts against the outer contour of the cam and rolls on it.

[0018] The beneficial effect of adopting the above further solution is that the spring causes the roller to abut against the outer contour of the cam and roll thereon, and the top block drives the pin shaft and the positioning block to move along the central axis direction to approach or move away from the field of view positioning member.

[0019] Furthermore, when the rotating hub mirror seat rotates to 0° or 90°, the positioning block is embedded in the limiting groove, and when the motor assembly drives the rotating hub mirror seat to rotate again, the cam pushes the top block close to the fixing plate to drive the positioning block to disengage from the limiting groove.

[0020] The beneficial effect of adopting the above further scheme is that, through the design of the cam profile, the positioning block can be accurately embedded in the limit groove when the hub mirror seat rotates to 0° or 90°, and when the motor is started again to drive the hub mirror seat to rotate, the cam pushes the top block close to the fixed plate to drive the positioning block to disengage from the limit groove. It should be pointed out that both the positioning block and the limit groove have arc chamfers with a large radius and are embedded at a shallow depth, so that after the positioning block is embedded in the limit groove, it can be disengaged by the power generated by the motor starting again. The locking of the positioning block and the limit groove is only to provide a smaller locking force after the hub mirror seat rotates to 0° or 90° and the motor stops, to ensure that the hub mirror seat will not easily rotate due to looseness, thereby ensuring the stability of the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a rotating hub type automatic focusing lens provided by the present invention;

[0022] Figure 2 for Figure 1 An exploded view of a rotating hub autofocus lens is shown;

[0023] Figure 3 for Figure 2 A schematic structural diagram of a rotating hub assembly of a rotating hub type automatic focusing lens is shown;

[0024] Figure 4 for Figure 3 An exploded view of the hub assembly is shown;

[0025] Figure 5 for Figure 2 A schematic structural diagram of a motor assembly of a rotating hub type automatic focusing lens is shown;

[0026] Figure 6 for Figure 5 An exploded view of the motor assembly is shown;

[0027] Figure 7 for Figure 1 The structural principle diagram of a field of view positioning component and a rotating hub component of a rotating hub type automatic focusing lens shown;

[0028] Figure 8 for Figure 7 A partial view of the positioning block and the limiting groove of the structural principle diagram of the field of view positioning assembly and the hub assembly is shown.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Main mirror seat, 2. Upper cover, 3. Hub assembly, 301. Hub mirror seat, 302. Optical lens group, 303. Optical adjustment gasket, 304. Field positioning piece, 3041. Limiting groove, 305. Transmission adjustment gasket, 306. Cam gear, 307. Lower bearing 1, 308. Bearing pressure cover, 309. Bearing spacer, 310. Lower bearing 2, 311. Lower bearing pressure ring, 312. Upper bearing, 313. Upper bearing pressure ring , 314, limit switch collision block, 315, cam, 316, upper shaft, 317, lower shaft, 4, motor assembly, 401, motor seat, 402, motor, 403, driving gear, 404, driven gear, 405, driving bearing, 406, bearing cover, 407, driven shaft, 5, field of view positioning assembly, 501, fixing plate, 502, pin shaft, 503, top block, 504, roller, 505, positioning block, 6, limit switch. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 1-8 As shown, a hub type automatic focusing lens comprises a main mirror base 1, an upper cover 2, a hub assembly 3, a motor assembly 4, a field of view positioning assembly 5 and a limit switch 6, wherein the hub assembly 3 and the motor assembly 4 are both arranged in the main mirror base 1, the upper cover 2 is fixedly connected to one side of the main mirror base 1, the limit switch 6 is fixedly connected to the inner side of the upper cover 2, the motor assembly 4 drives the hub assembly 3 to rotate to 0° or 90°, the hub assembly 3 is also provided with a trigger device for colliding and triggering the limit switch 6 to stop the motor assembly 4, and the field of view positioning assembly 5 is arranged on one side of the main mirror base 1 and is used to lock the hub assembly 3 when it rotates to 0° or 90°.

[0033] The hub assembly 3 includes a hub mirror base 301, an optical assembly, an upper shaft 316, a lower shaft 317, a field of view positioning member 304, a transmission adjustment gasket 305 and a cam gear 306; the optical assembly is provided with two and they are symmetrically distributed on both sides of the hub mirror base 301, each of the optical assemblies includes an optical lens group 302 and an optical adjustment gasket 303, and each pair of the optical adjustment gasket 303 and the optical lens group 302 are sequentially stacked and fixedly connected to the hub mirror The upper shaft 316 and the lower shaft 317 are coaxially fixedly connected to the top and bottom of the rotating hub mirror seat 301, respectively; the field of view positioning member 304, the transmission adjustment gasket 305 and the cam gear 306 are sequentially and coaxially sleeved on the lower shaft 317 from top to bottom and they all rotate synchronously with the lower shaft 317; the upper shaft 316 and the lower shaft 317 are respectively rotatably connected to the middle of the upper cover 2 and the bottom of the primary mirror seat 1. Preferably, the ends of the upper shaft 316 are coaxially sleeved with an upper bearing 312 and an upper bearing pressure ring 313 from bottom to top, respectively, and the ends of the lower shaft 317 are at least coaxially sleeved with a lower bearing 1 307, a bearing pressure cover 308, a bearing spacer 309, a lower bearing 2 310 and a lower bearing pressure ring 311 from top to bottom, so that the rotation of the rotating hub assembly 3 in the primary mirror seat 1 is smoother and more stable.

[0034] The trigger device includes a limit switch collision block 314, which is fixedly connected to the top of the rotating hub mirror seat 301. When the rotating hub mirror seat 301 rotates to 0° or 90°, the limit switch collision block 314 hits the limit switch 6. When the rotating hub mirror seat 301 rotates to 0° or 90°, the limit switch collision block 314 hits the limit switch 6, and the control system controls the motor 402 to stop working to avoid over-travel or collision damage to parts.

[0035] The bottom of the cam gear 306 is fixedly connected with a cam 315. The cam 315 rotates synchronously with the cam gear 306, and the cam 315 can lift the top block 503 to move it in a direction close to the fixed plate 501 to drive the positioning block 505 to disengage from the limiting groove 3041.

[0036] The field of view positioning member 304 is cylindrical, and two limiting grooves 3041 are formed on the outer periphery of the field of view positioning member 304, and the symmetric center lines of the two limiting grooves 3041 are perpendicular to each other. The two limiting grooves 3041 are exactly 90° apart, and the positioning block 505 can be accurately embedded in the limiting groove 3041 when the rotating hub mirror seat 301 rotates to 0° or 90°.

[0037] The motor assembly 4 includes a motor seat 401, a motor 402, a driving gear 403, a driven gear 404 and a driven shaft 407. The motor seat 401 is fixedly connected to the main mirror seat 1, the motor 402 is fixedly connected to one side of the motor seat 401 and its motor shaft passes through the motor seat 401, the driving gear 403 is fixedly connected to the motor shaft of the motor 402, the driven shaft 407 is arranged parallel to the motor shaft of the motor 402 and is rotatably connected to the motor seat 401, the driven gear 404 is fixedly connected to the driven shaft 407, and the driven gear 404 is respectively meshed with the driving gear 403 and the cam gear 306. Preferably, both ends of the driven shaft 407 are sleeved with driving bearings 405, and the bottom end of the driven shaft 407 is also sleeved with a bearing cover 406, and the bearing cover 406 is fixedly connected to the motor base 401; the motor 402 drives the driving gear 403 to rotate, the driving gear 403 drives the driven gear 404 to rotate, and the driven gear 404 drives the cam gear 306 to rotate, thereby driving the entire hub assembly 3 to rotate.

[0038] The field of view positioning assembly 5 includes a fixed plate 501, a pin 502, a top block 503, a roller 504 and a positioning block 505. The fixed plate 501 is fixedly connected to one side of the primary mirror mount 1. The pin 502 passes through the fixed plate 501 and the primary mirror mount 1 in sequence and can move along its own central axis to approach or move away from the field of view positioning member 304. The positioning block 505 matches the limiting groove 3041 and is fixedly connected to the extending end of the pin 502. One end of the top block 503 is rotatably connected to the roller 504. One side of the top block 503 is fixedly connected to the outer periphery of the pin 502. It also includes a spring, one end of which is fixedly connected to the other end of the top block 503, and the other end of the spring is fixedly connected to the fixed plate 501. The elastic force of the spring ensures that the roller 504 abuts against the outer contour of the cam 315 and rolls thereon. The spring makes the roller 504 abut against the outer contour of the cam 315 and roll thereon, and the top block 503 drives the pin shaft 502 and the positioning block 505 to move along the central axis direction thereof to approach or move away from the field of view positioning member 304 .

[0039] When the rotating hub mirror seat 301 rotates to 0° or 90°, the positioning block 505 is embedded in the limiting groove 3041. When the motor assembly 4 drives the rotating hub mirror seat 301 to rotate again, the cam 315 pushes the top block 503 close to the fixing plate 501 to drive the positioning block 505 to disengage from the limiting groove 3041. By designing the profile of the cam 315, the positioning block 505 can be accurately embedded in the limiting groove 3041 when the hub mirror seat 301 rotates to 0° or 90°, and when the motor 402 is started again to drive the hub mirror seat 301 to rotate, the cam 315 pushes the top block 503 close to the fixed plate 501 to drive the positioning block 505 to disengage from the limiting groove 3041. It should be pointed out that the positioning block 505 and the limiting groove 3041 both have arc chamfers with a large radius and are embedded at a shallow depth, so that after the positioning block 505 is embedded in the limiting groove 3041, it can be disengaged by the power generated by the motor 402 being started again. The locking of the positioning block 505 and the limiting groove 3041 is only to provide a smaller locking force after the hub mirror seat 301 rotates to 0° or 90° and the motor 402 stops, to ensure that the hub mirror seat 301 will not easily rotate due to looseness, thereby ensuring the stability of the optical axis.

[0040] The fixed connection mentioned in the present application can be threaded connection, welding or bonding, and the parts on the shaft are mainly keyed.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotating hub type auto-focus lens, characterized in that: The invention comprises a primary mirror seat (1), an upper cover (2), a rotating hub assembly (3), a motor assembly (4), a field of view positioning assembly (5) and a limit switch (6); the rotating hub assembly (3) and the motor assembly (4) are both arranged in the primary mirror seat (1); the upper cover (2) is fixedly connected to one side of the primary mirror seat (1); the limit switch (6) is fixedly connected to the inner side of the upper cover (2); the motor assembly (4) drives the rotating hub assembly (3) to rotate to 0° or 90°; the rotating hub assembly (3) is also provided with a trigger device for colliding with and triggering the limit switch (6) to stop the motor assembly (4); The field of view positioning assembly (5) is arranged on one side of the main mirror seat (1) and is used to lock the rotating hub assembly (3) when it is rotated to 0° or 90°; the rotating hub assembly (3) comprises a rotating hub mirror seat (301), an optical assembly, an upper shaft (316), a lower shaft (317), a field of view positioning member (304), a transmission adjustment gasket (305) and a cam gear (306); two optical assemblies are provided and are symmetrically distributed on both sides of the rotating hub mirror seat (301), each of the optical assemblies comprises an optical lens group (302) and an optical adjustment gasket (303), and each pair of the optical adjustment gaskets (303) ) and the optical lens group (302) are sequentially stacked and fixedly connected to one side of the rotating hub mirror seat (301); the upper shaft (316) and the lower shaft (317) are respectively coaxially fixedly connected to the top and bottom of the rotating hub mirror seat (301); the field of view positioning member (304), the transmission adjustment gasket (305) and the cam gear (306) are sequentially and coaxially sleeved on the lower shaft (317) from top to bottom and they all rotate synchronously with the lower shaft (317); the upper shaft (316) and the lower shaft (317) are respectively rotatably connected to the middle part of the upper cover (2) and the main mirror seat (1) bottom; the trigger device comprises a limit switch collision block (314), the limit switch collision block (314) is fixedly connected to the top of the rotating hub mirror seat (301), and when the rotating hub mirror seat (301) rotates to 0° or 90°, the limit switch collision block (314) hits the limit switch (6); the bottom of the cam gear (306) is fixedly connected to a cam (315); the field of view positioning member (304) is cylindrical, and two limit grooves (3041) are provided on the outer periphery of the field of view positioning member (304), and the symmetric center lines of the two limit grooves (3041) are perpendicular to each other;The motor assembly (4) comprises a motor seat (401), a motor (402), a driving gear (403), a driven gear (404) and a driven shaft (407); the motor seat (401) is fixedly connected to the inside of the primary mirror seat (1); the motor (402) is fixedly connected to one side of the motor seat (401) and its motor shaft passes through the motor seat (401); the driving gear (403) is fixedly connected to the motor shaft of the motor (402); the driven shaft (407) is arranged parallel to the motor shaft of the motor (402) and is rotatably connected to the motor seat (401); the driven gear (404) is fixedly connected to the driven shaft (407); and the driven gear (404) is meshed with the driving gear (403) and the cam gear (306) respectively; the field of view positioning assembly (5) comprises a fixing plate (501), a pin shaft (502), a top block (503) and a bottom block (506); 3) a roller (504) and a positioning block (505), wherein the fixing plate (501) is fixedly connected to one side of the primary mirror seat (1), the pin shaft (502) passes through the fixing plate (501) and the primary mirror seat (1) in sequence and can move along its own central axis to approach or move away from the field of view positioning member (304), the positioning block (505) matches the limiting groove (3041) and is fixedly connected to the insertion end of the pin shaft (502), one end of the top block (503) is rotatably connected to the roller (504), one side of the top block (503) is fixedly connected to the outer periphery of the pin shaft (502), and a spring is further included, one end of the spring is fixedly connected to the other end of the top block (503), and the other end of the spring is fixedly connected to the fixing plate (501), and the elastic force of the spring ensures that the roller (504) abuts against the outer contour of the cam (315) and rolls thereon. ; 2. The rotating hub type auto-focus lens according to claim 1, characterized in that: When the rotating hub mirror seat (301) rotates to 0° or 90°, the positioning block (505) is embedded in the limiting groove (3041); when the motor assembly (4) drives the rotating hub mirror seat (301) to rotate again, the cam (315) pushes the top block (503) close to the fixing plate (501) to drive the positioning block (505) to disengage from the limiting groove (3041).

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