CN212276073U - Rotary hub type automatic focusing lens - Google Patents

Abstract

The utility model relates to an automatic focusing camera lens of commentaries on classics hub formula, including main microscope base, upper cover, commentaries on classics hub subassembly, motor element, visual field locating component and limit switch, commentaries on classics hub subassembly and motor element all locate in the main microscope base, upper cover fixed connection in one side of main microscope base, limit switch fixed connection in the inboard of upper cover, the motor element drive change the rotatory to 0 or 90 of hub subassembly, it is used for the collision and triggers still to be equipped with trigger device on the hub subassembly limit switch so that motor element stops, visual field locating component locates one side of main microscope base and its locking when changeing the rotatory to 0 or 90 departments of hub subassembly. Has the advantages that: the focusing speed is fast, and the optical axis uniformity is good. The requirements on manufacturing and mounting processes are low, and the requirements on mass production are met. The change of the azimuth direction is realized only by the interactive change at two positions of 0 degree and 90 degrees, the switching speed is extremely high, and the requirements of rapidness and maneuverability are met.

Description

Rotary hub type automatic focusing lens

Technical Field

The utility model relates to an optical device especially relates to an automatic focusing lens of rotating hub formula.

Background

Along with the development of optical-electro-mechanical technology, the lens is required to be capable of automatic focusing, and the traditional focusing mode has: (1) the thread engagement type is simple in transmission mode, but large in friction force and low in matching precision, and cannot be applied to occasions with high requirements on consistency of optical axes; (2) the linear focusing type is adopted, the friction resistance of the rolling linear guide rail is small, the driving power is small, and the positioning precision and the repeated positioning precision are high; the main lens barrel and the focusing barrel are precisely matched and have large contact area, so that the friction resistance is large in the movement process, and the driving requirement can be met only by selecting a motor with large safety coefficient; the assembly precision requirement is high and complicated, so that the batch production difficulty is high; (3) the cam mechanism is simple in structure, but the processing requirement of a cam curve is high, and the batch production difficulty is high. Meanwhile, as the limit pin moves in a curve in the curve groove, the speed is low, the view field switching time is slightly long, and the requirements on rapidity and maneuverability cannot be met.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved of the present invention is to provide a rotary hub type automatic focusing lens to solve the above problems.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a rotating hub type automatic focusing lens comprises a main lens base, an upper cover, a rotating hub assembly, a motor assembly, a view field positioning assembly and a limit switch, wherein the rotating hub assembly and the motor assembly are arranged in the main lens base, the upper cover is fixedly connected to one side of the main lens base, the limit switch is fixedly connected to the inner side of the upper cover, the motor assembly drives the rotating hub assembly to rotate to 0 degree or 90 degrees, a triggering device is further arranged on the rotating hub assembly and used for colliding and triggering the limit switch to stop the motor assembly, and the view field positioning assembly is arranged on one side of the main lens base and used for enabling the rotating hub assembly to rotate to 0 degree or 90 degrees and then is locked.

The utility model has the advantages that: the focusing speed is fast, and the optical axis uniformity is good. The large lens cone and the small lens cone do not need to be precisely matched and processed, the requirements on manufacturing and mounting processes are low, and the requirements on mass production are met. The rotary hub type focusing does not move the lens in the optical axis direction, and the change of the azimuth direction is realized only by the mutual change of two positions of 0 degrees and 90 degrees, so that the switching speed is extremely high, and the requirements of rapidness and flexibility are met. The focusing speed is extremely high, the mode that a motor drives a gear and a cam mechanism is adopted, the position of the lens is changed in a mutual mode only at two positions of 0 degree and 90 degrees, the switching of the extremely-fast view field is realized, and the maneuverability is strong. The optical axis consistency is good, and the high-consistency optical axis can be completed only by precision guarantee when the two positions of 0 degree and 90 degrees are needed for field switching. The error caused by the intermediate transmission link is omitted, the requirement on the precision of parts is not high, and the manufacturability is greatly improved.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the rotating hub assembly comprises a rotating hub lens seat, an optical assembly, an upper shaft, a lower shaft, a view field positioning piece, a transmission adjusting gasket and a gear with a cam; the optical assemblies are arranged on two sides of the rotating hub mirror seat and symmetrically distributed on two sides of the rotating hub mirror seat, each optical assembly comprises an optical lens group and an optical adjusting gasket, and each pair of the optical adjusting gasket and each pair of the optical lens group are sequentially and fixedly connected to one side of the rotating hub mirror seat in a laminated manner; the upper shaft and the lower shaft are respectively coaxially and fixedly connected to the top and the bottom of the rotating hub mirror base, the view field positioning piece, the transmission adjusting gasket and the gear with the cam are sequentially sleeved on the lower shaft from top to bottom and coaxially, the lower shaft and the gear with the cam rotate synchronously along with the lower shaft, and the upper shaft and the lower shaft are respectively and rotatably connected to the middle of the upper cover and the bottom of the main mirror base.

The technical scheme has the advantages that the upper shaft and the lower shaft are respectively connected to the middle of the upper cover and the bottom of the main lens base in a rotating mode, so that the rotating hub lens base can rotate in the main lens base to adjust the visual angle of the optical lens group, the visual field positioning piece and the position of the gear with the cam on the lower shaft can be adjusted through the transmission adjusting gasket, the best transmission effect can be achieved, and the position of the two optical lens groups on the rotating hub lens base can be adjusted through the optical adjusting gasket, so that the best visual angle position can be achieved.

Further, trigger device includes that limit switch hits the piece, limit switch hits the piece fixed connection in the top of commentaries on classics hub mirror seat, when commentaries on classics hub mirror seat rotates to 0 or 90 departments limit switch hits the piece striking limit switch.

The beneficial effect who adopts above-mentioned further scheme is that when the commentaries on classics hub mirror seat rotates to 0 or 90 when the limit switch hits the piece striking limit switch, control system control motor stop work avoids overstroke or takes place the collision damage spare part.

Further, a cam is fixedly connected to the bottom of the cam gear.

The cam can jack the jacking block to move along the direction close to the fixed plate so as to drive the positioning block to be separated from the limiting groove.

Furthermore, the view field positioning piece is cylindrical, two limiting grooves are formed in the periphery of the view field positioning piece, and the symmetrical center lines of the two limiting grooves are perpendicular to each other.

Adopt above-mentioned further scheme's beneficial effect be, two spacing grooves just in time differ 90, when the commentaries on classics hub mirror base rotates to 0 or 90 departments the accurate embedding spacing groove of locating piece homoenergetic.

Further, motor element includes motor cabinet, motor, drive gear, driven gear and driven shaft, motor cabinet fixed connection in the main mirror seat, motor fixed connection in one side of motor cabinet and its motor shaft pass the motor cabinet, drive gear fixed connection in on the motor shaft of motor, the driven shaft with motor shaft parallel arrangement of motor and its rotation connect in on the motor cabinet, driven gear fixed connection in on the driven shaft, driven gear respectively with drive gear with take the cam gear meshing.

The beneficial effect who adopts above-mentioned further scheme is that, the motor drives drive gear rotatory, and drive gear drives driven gear rotatory, and driven gear drives again and takes cam gear rotatory to it is rotatory to drive whole commentaries on classics hub subassembly, and gear drive is accurate, stable, longe-lived.

Further, the visual field locating component includes fixed plate, round pin axle, kicking block, gyro wheel and locating piece, fixed plate fixed connection in one side of primary mirror seat, the round pin axle passes in proper order the fixed plate with primary mirror seat and it can follow self central axis and remove in order to be close to or keep away from the visual field setting element, the locating piece with spacing groove phase-match and its fixed connection in the end of stretching into of round pin axle, the one end of kicking block rotates and is connected with the gyro wheel, one side of kicking block with the periphery fixed connection of round pin axle still includes the spring, the one end of spring with the other end fixed connection of kicking block, the other end of spring with fixed plate fixed connection, the elasticity of spring is guaranteed the gyro wheel with the outline butt of cam rolls on it.

The beneficial effect who adopts above-mentioned further scheme is that, the spring make the gyro wheel with the outline butt of cam rolls on it, and the kicking block drives round pin axle and locating piece and moves in order to be close to or keep away from the visual field setting element along its central axis direction.

Further, when the rotating hub mirror base rotates to 0 degree or 90 degrees, the positioning block is embedded into the limiting groove, and when the motor assembly drives the rotating hub mirror base to rotate again, the cam pushes the ejector block to be close to the fixed plate so as to drive the positioning block to be separated from the limiting groove.

The beneficial effects of adopting above-mentioned further scheme are that, through the design to the cam profile for the rotary hub mirror holder rotates the accurate embedding spacing groove of locating piece homoenergetic when 0 or 90 departments, and when the motor restarted drive rotary hub mirror holder rotated, the cam promoted the kicking block is close to the fixed plate is in order to drive the locating piece breaks away from the spacing groove, need point out very much that, locating piece and spacing groove all have the circular arc chamfer of great radius and the degree of depth of embedding is shallow, make locating piece embedding spacing groove after can be broken away from by the produced power of motor restart, the locking of locating piece and spacing groove is only for rotary hub mirror holder rotates to 0 or 90 departments and after the motor stops, provides a less locking force, guarantees that rotary hub mirror holder can not rotate because of becoming flexible easily, thereby guarantees the stability of optical axis.

Drawings

Fig. 1 is a schematic structural view of a hub type automatic focusing lens provided by the present invention;

fig. 2 is an exploded view of a rotary hub type automatic focusing lens shown in fig. 1;

fig. 3 is a schematic structural view of a hub assembly of the hub type automatic focusing lens shown in fig. 2;

FIG. 4 is an exploded view of the hub assembly shown in FIG. 3;

fig. 5 is a schematic structural view of a motor assembly of the rotary hub type automatic focus adjustment lens shown in fig. 2;

FIG. 6 is an exploded view of the motor assembly shown in FIG. 5;

fig. 7 is a schematic structural diagram of a field positioning assembly and a hub assembly of the hub-type automatic focusing lens shown in fig. 1;

fig. 8 is a partial view of the locating block and the limiting groove of the structural schematic diagram of the view field positioning assembly and the rotating hub assembly shown in fig. 7.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the lens driving mechanism comprises a main lens base, 2, an upper cover, 3, a rotary hub assembly, 301, a rotary hub lens base, 302, an optical lens group, 303, an optical adjusting gasket, 304, a view field positioning piece, 3041, a limiting groove, 305, a transmission adjusting gasket, 306, a gear with a cam, 307, a lower bearing I, 308, a bearing gland, 309, a bearing spacer ring, 310, a lower bearing II, 311, a lower bearing pressing ring, 312, an upper bearing, 313, an upper bearing pressing ring, 314, a limit switch collision block, 315, a cam, 316, an upper shaft, 317, a lower shaft, 4, a motor assembly, 401, a motor base, 402, a motor, 403, a driving gear, 404, a driven gear, 405, a driving bearing, 406, a bearing cover, 407, a driven shaft, 5, a view field positioning assembly, 501, a fixing plate, 502, a pin shaft, 503, a top block, 504, a roller, 505, a positioning block, 6 and a limit.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 8, a rotary hub type automatic focusing lens includes a main lens base 1, an upper cover 2, a rotary hub assembly 3, a motor assembly 4, a field positioning assembly 5 and a limit switch 6, where the rotary hub assembly 3 and the motor assembly 4 are both disposed in the main lens base 1, the upper cover 2 is fixedly connected to one side of the main lens base 1, the limit switch 6 is fixedly connected to the inner side of the upper cover 2, the motor assembly 4 drives the rotary hub assembly 3 to rotate to 0 ° or 90 °, a trigger device is further disposed on the rotary hub assembly 3 for colliding and triggering the limit switch 6 to stop the motor assembly 4, and the field positioning assembly 5 is disposed on one side of the main lens base 1 and is used for locking the rotary hub assembly 3 when rotating to 0 ° or 90 °.

The hub assembly 3 comprises a hub mirror base 301, an optical assembly, an upper shaft 316, a lower shaft 317, a view field positioning piece 304, a transmission adjusting gasket 305 and a cam gear 306; the optical assemblies are arranged at two sides of the rotating hub mirror base 301 and symmetrically distributed at the two sides of the rotating hub mirror base 301, each optical assembly comprises an optical lens group 302 and an optical adjusting gasket 303, and each pair of the optical adjusting gasket 303 and the optical lens group 302 are sequentially and fixedly connected to one side of the rotating hub mirror base 301 in a laminated manner; the upper shaft 316 and the lower shaft 317 are coaxially and fixedly connected to the top and the bottom of the rotating hub mirror base 301, the view field positioning member 304, the transmission adjusting washer 305 and the cam gear 306 are sequentially sleeved on the lower shaft 317 from top to bottom and coaxially and all rotate synchronously along with the lower shaft 317, and the upper shaft 316 and the lower shaft 317 are respectively and rotatably connected to the middle of the upper cover 2 and the bottom of the main mirror base 1. Preferably, the end of the upper shaft 316 is coaxially sleeved with an upper bearing 312 and an upper bearing ring 313 from bottom to top, and the end of the lower shaft 317 is coaxially sleeved with a lower bearing one 307, a bearing gland 308, a bearing spacer 309, a lower bearing two 310 and a lower bearing ring 311 from top at least in sequence, so that the rotation of the hub assembly 3 in the main mirror base 1 is smoother and smoother.

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 base 301, and when the rotating hub mirror base 301 rotates to 0 degree or 90 degrees, the limit switch collision block 314 collides with the limit switch 6. When the rotating hub mirror base 301 rotates to 0 degree or 90 degrees, the limit switch collision block 314 collides with the limit switch 6, and the control system controls the motor 402 to stop working, so as to avoid over-travel or collision damage to parts.

A cam 315 is fixedly connected to the bottom of the cam gear 306. The cam 315 rotates synchronously with the cam gear 306, and the cam 315 can jack the jacking block 503 to move in a direction close to the fixing plate 501 so as to drive the positioning block 505 to disengage from the limiting groove 3041.

The view field positioning element 304 is cylindrical, two limiting grooves 3041 are formed in the periphery of the view field positioning element 304, and the symmetric center lines of the two limiting grooves 3041 are perpendicular to each other. The two limit grooves 3041 have a 90-degree difference, and when the hub rotating base 301 rotates to 0 degree or 90 degrees, the positioning block 505 can be accurately inserted into the limit grooves 3041.

The motor assembly 4 comprises a motor base 401, a motor 402, a driving gear 403, a driven gear 404 and a driven shaft 407, the motor base 401 is fixedly connected in the main mirror base 1, the motor 402 is fixedly connected to one side of the motor base 401 and a motor shaft of the motor base 401 passes through the motor base 401, the driving gear 403 is fixedly connected to the motor shaft of the motor 402, the driven shaft 407 is parallel to the motor shaft of the motor 402 and is rotatably connected to the motor base 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, the bottom end of the driven shaft 407 is further sleeved with a bearing cover 406, and the bearing cover 406 is fixedly connected with 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, so as to drive the whole hub assembly 3 to rotate.

The visual field positioning assembly 5 comprises a fixing plate 501, a pin shaft 502, a top block 503, a roller 504 and a positioning block 505, the fixing plate 501 is fixedly connected to one side of the main mirror base 1, the pin shaft 502 sequentially passes through the fixing plate 501 and the main mirror base 1 and can move along the central axis thereof to approach or separate from the view field positioning element 304, the positioning block 505 is matched with 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 with the roller 504, one side of the top block 503 is fixedly connected with the periphery of the pin shaft 502, the spring is further included, one end of the spring is fixedly connected with the other end of the top block 503, the other end of the spring is fixedly connected with the fixing plate 501, the spring force of the spring ensures that the roller 504 abuts and rolls on the outer contour of the cam 315. 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 separate from the view positioning element 304.

When the rotating hub mirror base 301 rotates to 0 ° or 90 °, the positioning block 505 is inserted into the limiting groove 3041, and when the motor assembly 4 drives the rotating hub mirror base 301 to rotate again, the cam 315 pushes the top block 503 to approach the fixing plate 501, so as to drive the positioning block 505 to disengage from the limiting groove 3041. Through the design of the profile of the cam 315, the positioning block 505 can be accurately inserted into the limiting groove 3041 when the rotating hub mirror base 301 rotates to 0 ° or 90 °, and when the motor 402 is started again to drive the rotating hub mirror base 301 to rotate, the cam 315 pushes the top block 503 to approach the fixing plate 501 to drive the positioning block 505 to be separated from the limiting groove 3041, it should be particularly noted that the positioning block 505 and the limiting groove 3041 both have arc chamfers with larger radii and shallower insertion depths, so that the positioning block 505 can be separated from the power generated by the motor 402 when being inserted into the limiting groove 3041 again, and the locking of the positioning block 505 and the limiting groove 3041 is only to provide a smaller locking force after the rotating hub mirror base 301 rotates to 0 ° or 90 ° and the motor 402 is stopped, so as to ensure that the rotating hub mirror base 301 cannot easily rotate due to looseness, thereby ensuring the stability of the optical axis.

The fixed connection mentioned in the application can be threaded connection, welding or bonding, and the parts on the shaft are mainly in key connection.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. A hub-rotating type automatic focusing lens is characterized by comprising a main lens base (1), an upper cover (2), a hub rotating component (3), a motor component (4), a view field positioning component (5) and a limit switch (6), the rotating hub component (3) and the motor component (4) are both arranged in the main lens base (1), the upper cover (2) is fixedly connected with one side of the main lens base (1), the limit switch (6) is fixedly connected with the inner side of the upper cover (2), the motor component (4) drives the rotating hub component (3) to rotate to 0 degree or 90 degrees, the rotating hub component (3) is also provided with a triggering device for colliding and triggering the limit switch (6) to stop the motor component (4), the view field positioning assembly (5) is arranged on one side of the main lens base (1) and used for locking the rotary hub assembly (3) when the rotary hub assembly rotates to 0 degree or 90 degrees.

2. The rotary hub type automatic focusing lens according to claim 1, wherein the rotary hub assembly (3) comprises a rotary hub lens base (301), an optical assembly, an upper shaft (316), a lower shaft (317), a view field positioning piece (304), a transmission adjusting shim (305) and a cam gear (306); the optical assemblies are arranged on two sides of the rotating hub mirror seat (301) and symmetrically distributed on the two sides of the rotating hub mirror seat, each optical assembly comprises an optical mirror group (302) and an optical adjusting gasket (303), and each pair of the optical adjusting gasket (303) and the optical mirror group (302) are sequentially and fixedly connected to one side of the rotating hub mirror seat (301) in a laminated manner; the upper shaft (316) with lower shaft (317) coaxial ground fixed connection respectively in the top and the bottom of commentaries on classics hub microscope base (301), visual field setting element (304) transmission adjusting shim (305) with take cam gear (306) to overlap from last to down and coaxially in proper order and locate on lower shaft (317) and it all follows lower shaft (317) synchronous rotation, upper shaft (316) with lower shaft (317) rotate respectively connect in upper cover (2) middle part with main microscope base (1) bottom.

3. The rotary hub type automatic focusing lens according to claim 2, wherein the triggering device comprises a limit switch collision block (314), the limit switch collision block (314) is fixedly connected to the top of the rotary hub lens holder (301), and the limit switch collision block (314) collides with the limit switch (6) when the rotary hub lens holder (301) rotates to 0 ° or 90 °.

4. The rotary hub type automatic focusing lens according to claim 2, wherein a cam (315) is fixedly connected to the bottom of the cam gear (306).

5. The automatic focusing lens of claim 4, wherein the view field positioning element (304) is cylindrical, two limiting grooves (3041) are formed on the periphery of the view field positioning element (304), and the symmetric center lines of the two limiting grooves (3041) are perpendicular to each other.

6. A rotary hub type automatic focus adjusting lens according to claim 2, wherein the motor assembly (4) comprises a motor base (401), a motor (402), a driving gear (403), a driven gear (404) and a driven shaft (407), the motor base (401) is fixedly connected in the main mirror base (1), the motor (402) is fixedly connected with one side of the motor base (401) and a motor shaft of the motor (402) penetrates through the motor base (401), the driving gear (403) is fixedly connected to a motor shaft of the motor (402), the driven shaft (407) is arranged in parallel with a motor shaft of the motor (402) and is rotationally connected to the motor base (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).

7. The rotary hub type automatic focusing lens according to claim 5, wherein the view field positioning assembly (5) comprises a fixing plate (501), a pin shaft (502), a top block (503), a roller (504) and a positioning block (505), the fixing plate (501) is fixedly connected to one side of the main lens holder (1), the pin shaft (502) sequentially passes through the fixing plate (501) and the main lens holder (1) and can move along the central axis of the pin shaft to be close to or far away from the view field positioning member (304), the positioning block (505) is matched with the limiting groove (3041) and is fixedly connected to the extending end of the pin shaft (502), one end of the top block (503) is rotatably connected with the roller (504), one side of the top block (503) is fixedly connected with the periphery of the pin shaft (502), and the rotary hub type automatic focusing lens further comprises a spring, one end of the spring is fixedly connected with the other end of the top block (503), the other end of the spring is fixedly connected with the fixing plate (501), and the elasticity of the spring ensures that the roller (504) is abutted against the outer contour of the cam (315) and rolls on the outer contour.

8. The automatic focusing lens of claim 7, wherein the positioning block (505) is inserted into the limiting groove (3041) when the hub mirror base (301) rotates to 0 ° or 90 °, and the cam (315) pushes the top block (503) to approach the fixing plate (501) to drive the positioning block (505) to disengage from the limiting groove (3041) when the motor assembly (4) drives the hub mirror base (301) to rotate again.

Images