Automatic zoom lens based on stepping motor

Abstract

The utility model relates to the technical field of chip image detection, in particular to an automatic zoom lens based on a stepping motor, which comprises an inner cylinder, the outer wall of the inner cylinder is rotatably connected with an outer sleeve, one side of the outer wall of the outer sleeve is provided with a driving part for rotary driving, and one end of the inner cylinder far away from the outer sleeve is provided with an objective lens fixing seat. According to the utility model, the objective lens main body is firstly installed on the objective lens installation seat, then the objective lens installation seat is inserted into the concave groove arranged on the side wall of the objective lens fixing seat, and then the objective lens installation seat and the concave groove are fixed through the annular pressing strip b and the annular pressing block. Therefore, when the objective lens main body is damaged, the objective lens mounting seat can be dismounted and replaced without a tool, and the whole automatic zoom lens does not need to be taken down from the image measuring instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of chip image detection, in particular to an automatic zoom lens based on a stepping motor. Background Art

[0002] Gantry-structured image measuring instruments are mainly used in the field of precision engineering, where the requirements for measurement accuracy and reliability are very high. It combines optical, mechanical, electronic and computing technologies, and uses high-resolution cameras and dedicated measurement software to perform non-contact size and shape measurements of the measured object. During the detection process, the image measuring instrument needs to use a lens to shoot and detect the measured object;

[0003] The image measuring instrument mostly uses an automatic zoom lens, which can automatically adjust the focal range. This lens can adjust the focal length through electronic or mechanical control without changing the lens position, thereby achieving shooting requirements at different focal lengths.

[0004] In the automatic zoom lens, the objective lens is mostly exposed to the outside, so it is the lens module that is most susceptible to damage during use, and therefore it is the lens that is most frequently replaced. However, the existing objective lens is mostly fixed to the bottom end of the automatic zoom lens by fixing parts (such as bolts, clips, etc.), which makes it difficult for personnel to install and remove the objective lens, so there are certain deficiencies.

[0005] In summary, it is necessary to invent an automatic zoom lens based on a stepping motor. Utility Model Content

[0006] To this end, the utility model provides an automatic zoom lens based on a stepper motor to solve the problem that the existing objective lens is mostly fixed to the bottom end of the automatic zoom lens by fixing parts (such as bolts, clamping parts, etc.), which makes it difficult for personnel to install and disassemble the objective lens.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: an automatic zoom lens based on a stepping motor, comprising an inner cylinder, the outer wall of the inner cylinder is rotatably connected to an outer sleeve, a driving component for rotational drive is provided on one side of the outer wall of the outer sleeve, an objective lens fixing seat is installed at the end of the inner cylinder away from the outer sleeve, an objective lens mounting seat is installed at the end of the objective lens fixing seat away from the inner cylinder, an objective lens body is embedded and fixed inside the objective lens mounting seat, and a fixing component for fixing the objective lens mounting seat is provided on the objective lens fixing seat.

[0008] Preferably, the driving component includes a side mounting seat, which is rotatably connected to one side of the outer wall of the outer sleeve, a stepper motor body is installed on the top end of the outer wall of the side mounting seat, and a driving gear is installed on the bottom end of the inner wall of the side mounting seat through a rotating shaft.

[0009] Preferably, a spline groove is provided at the upper end of the rotating shaft, and the bottom output shaft of the stepper motor body is configured as a spline shaft. The output shaft passes through the top of the inner wall of the side mounting seat and is spline-connected to the spline groove provided on the rotating shaft.

[0010] Preferably, the bottom of the outer wall side end of the stepper motor body is fixed to the top of the outer wall of the side mounting seat by fixing bolts, and a transmission gear is installed at the bottom of the outer wall side end of the outer sleeve and at a position corresponding to the driving gear, and the driving gear and the transmission gear are meshed with each other.

[0011] Preferably, the bottom end of the outer wall of the outer sleeve is rotatably connected to a mounting seat, and the fixing component includes an annular pressure block, which is installed on the outer wall of the objective lens fixing seat and on a side away from the outer sleeve. A concave groove is provided on the outer wall of one end of the objective lens fixing seat close to the annular pressure block, and the objective lens mounting seat is slidably installed in the concave groove.

[0012] Preferably, a side extension plate is fixed to one end of the objective lens mount inserted into the concave groove, the side extension plate extends to the outside of the objective lens mount, the outer wall of the side extension plate is slidably connected to the inner wall of the concave groove, and the inner wall of the concave groove is provided with a spline pattern.

[0013] Preferably, the inner wall of the concave groove and the upper end of the side extension plate are spline-connected with an annular strip b, the outer wall of the annular strip b is provided with a spline groove, the annular strip b abuts against the outer wall of the side extension plate, an annular extension plate is fixed at one end of the annular strip b away from the side extension plate and located on the outside of the concave groove, and the outer wall of the annular extension plate overlaps the outer wall of the objective lens fixing seat and is located at the outer end of the concave groove.

[0014] Preferably, a magnet pin is fixed on the outer wall of the annular pressure block and one end close to the objective lens fixing seat, and a plurality of the magnet pins are evenly arranged in an annular array. Avoidance slots are provided on the outer wall of the objective lens fixing seat and at positions corresponding to the magnet pins, and the outer walls of the magnet pins are magnetically connected to the inner walls of the avoidance slots.

[0015] Preferably, an annular bead a is fixed to the inner wall of the annular pressing block and at a position corresponding to the annular bead b, and the outer wall of the annular bead a away from the annular pressing block abuts against the outer wall of the annular extension plate.

[0016] The beneficial effects of the utility model are:

[0017] In the utility model, the objective lens body is first mounted on the objective lens mounting seat, and then the objective lens mounting seat is inserted into the concave groove provided on the side wall of the objective lens fixing seat, and then the objective lens mounting seat and the concave groove are fixed by the annular pressure strip b and the annular pressure block, so that when the objective lens body is damaged, personnel can complete the disassembly and replacement of the objective lens mounting seat without the aid of tools, and there is no need to remove the entire automatic zoom lens from the image measuring instrument, so that personnel can use it more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of the utility model in the front view direction;

[0019] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the objective lens fixing seat in the utility model in the front view direction;

[0021] Figure 4 For this utility model Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the annular pressing block in the utility model;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the annular layering strip b in the utility model.

[0024] In the figure: 100, side mounting seat; 110, stepper motor body; 111, fixing bolt; 120, driving gear; 130, transmission gear; 200, outer sleeve; 210, inner cylinder; 300, objective lens fixing seat; 310, annular pressure block; 320, magnet latch; 321, annular pressure strip a; 330, annular pressure strip b; 331, spline groove; 332, annular extension plate; 400, objective lens mounting seat; 410, objective lens body; 420, side extension plate. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] Refer to the attached Figure 1-6The utility model provides an automatic zoom lens based on a stepper motor, comprising an inner cylinder 210, the outer wall of the inner cylinder 210 is rotatably connected to an outer sleeve 200, and a driving component for rotational drive is arranged on one side of the outer wall of the outer sleeve 200, and the driving component comprises a side mounting seat 100, the side mounting seat 100 is rotatably connected to one side of the outer wall of the outer sleeve 200, and the arranged side mounting seat 100 can be installed and fixed at the detection end of the image measuring instrument when in use, and a stepper motor body 110 is installed on the top of the outer wall of the side mounting seat 100, and a driving gear 120 is installed on the bottom end of the inner wall of the side mounting seat 100 through a rotating shaft, and a spline groove is provided on the upper end of the rotating shaft, and the bottom output shaft of the stepper motor body 110 is arranged in a spline shaft shape, and the output shaft passes through the top end of the inner wall of the side mounting seat 100 and is spline-connected to the spline groove provided on the rotating shaft, and the bottom of the outer wall side end of the stepper motor body 110 is fixed by a fixing bolt 1 11 is fixed to the top of the outer wall of the side mounting seat 100, and a transmission gear 130 is installed at the bottom of the outer wall side end of the outer sleeve 200 and at a position corresponding to the driving gear 120. The driving gear 120 and the transmission gear 130 mesh with each other. Specifically, the output shaft of the set stepper motor body 110 can be spline-connected with the top of the rotating shaft during installation, so that it is convenient for personnel to quickly replace the stepper motor body 110 when it is damaged. The set stepper motor body 110 can drive the driving gear 120 to rotate through the output shaft after power is turned on, and the driving gear 120 can drive the transmission gear 130 to rotate through meshing when rotating, so that the transmission gear 130 can drive the outer sleeve 200 to rotate, and the guide pins and arc guide rails are respectively fixed to the outer wall of the inner cylinder 210 and the outer wall of the outer sleeve 200, so that the outer sleeve 200 can push the inner cylinder 210 to move when rotating;

[0027] The end of the inner cylinder 210 away from the outer sleeve 200 is installed with an objective lens fixing seat 300, and the end of the objective lens fixing seat 300 away from the inner cylinder 210 is installed with an objective lens mounting seat 400, and an objective lens body 410 is embedded and fixed inside the objective lens mounting seat 400. A fixing component for fixing the objective lens mounting seat 400 is provided on the objective lens fixing seat 300, and the bottom end of the outer wall of the outer sleeve 200 is rotatably connected with the mounting seat, and the fixing component includes an annular pressing block 310, which is installed on the outer wall of the objective lens fixing seat 300 and away from the outer sleeve. On one side of the lens mounting seat 300, a concave groove is provided on the outer wall of one end of the lens mounting seat 300 close to the annular pressing block 310, and the lens mounting seat 400 is slidably mounted in the concave groove. The concave groove is provided to facilitate personnel to mount the lens mounting seat 400 on the front end of the outer wall of the lens mounting seat 300. A side extension plate 420 is fixed to one end of the lens mounting seat 400 inserted into the concave groove. The side extension plate 420 extends to the outside of the lens mounting seat 400, and the side extension plate 420 is provided to increase the cross-sectional area of ​​the insertion end of the lens mounting seat 400. , so that the annular pressure strip b330 can fix the objective lens mounting seat 400 in the concave groove, the outer wall of the side extension plate 420 is slidably connected to the inner wall of the concave groove, the inner wall of the concave groove is provided with a spline pattern, the inner wall of the concave groove and the upper end of the side extension plate 420 is spline-connected with the annular pressure strip b330, the outer wall of the annular pressure strip b330 is provided with a spline groove 331, the annular pressure strip b330 abuts against the outer wall of the side extension plate 420, and the inner wall of the annular pressure strip b330 is slidably connected to the outer wall of the objective lens mounting seat 400, and the annular pressure strip b330 is provided with a spline groove 331. The spline connection between the annular beading b330 and the inner wall of the concave groove is to improve the fixing effect of the annular beading b330 on the side extension plate 420, and to prevent the annular beading b330 from rotating in the concave groove when fixed. An annular extension plate 332 is fixed to one end of the annular beading b330 away from the side extension plate 420 and located outside the concave groove. The outer wall of the annular extension plate 332 overlaps the outer wall of the objective lens fixing seat 300 and is located at the outer end of the concave groove, and the annular extension plate 332 is provided to overlap the outer wall of the concave groove;

[0028] A magnet pin 320 is fixed to the outer wall of the annular pressing block 310 and one end close to the objective lens fixing seat 300. A plurality of magnet pins 320 are evenly arranged in an annular array. Avoidance slots are provided on the outer wall of the objective lens fixing seat 300 and at positions corresponding to the magnet pins 320. The outer walls of the magnet pins 320 are magnetically connected to the inner walls of the avoidance slots. A magnetic ring can also be provided in the set avoidance slot, and the magnetic ring and the magnet pin 320 can be magnetically connected. In this way, when the annular pressing block 310 is aligned with the objective lens fixing seat 300, the set magnet pin 320 can be magnetically connected to the avoidance slot. Suction connection is achieved, so that the annular pressure block 310 and the objective lens fixing seat 300 can be fixed. Annular pressure strips a321 are fixed on the inner wall of the annular pressure block 310 and at the corresponding position of the annular pressure strip b330. The outer wall of the annular pressure strip a321 on the side away from the annular pressure block 310 abuts against the outer wall of the annular extension plate 332. When the annular pressure block 310 is fixed, the annular pressure strip a321 can abut against the outer wall of the annular extension plate 332, so that the annular pressure strip b330 can be fixed to the inner wall of the concave groove, so that the objective lens mounting seat 400 and the side extension plate 420 can be fixed in the concave groove.

[0029] The use process of the utility model is as follows: first, after all the components are installed, the personnel can fix the device on the detection end of the image measuring instrument through the side mounting seat 100 and the mounting seat, so that the image measuring instrument can perform image detection on the object to be measured through the device;

[0030] During the detection process, the stepper motor body 110 can be powered on to drive the driving gear 120 to rotate through the output shaft, so that the driving gear 120 can drive the transmission gear 130 and the outer sleeve 200 to rotate through meshing, and the outer sleeve 200 can adjust the position of the objective lens mounting seat 400 through the inner cylinder 210 under the action of the guide pins and the arc guide rails when rotating, so as to adjust the position of the objective lens body 410, so as to automatically adjust the focal length of the device;

[0031] When the objective lens body 410 needs to be replaced due to damage, the personnel can directly hold the annular pressure block 310 and pull it off the objective lens fixing seat 300, so that the magnetic pin 320 is separated from the avoidance slot, and then the personnel can pull the annular pressure strip b330 out of the concave groove, then the personnel can remove the objective lens mounting seat 400, and then replace the objective lens body 410. After the objective lens body 410 is replaced, the personnel can insert the objective lens mounting seat 400 and the side extension plate 420 into the concave groove, and then take out the annular pressure strip b330 and connect it to the concave groove. The annular pressing block 310 is then taken out, and when the annular pressing block 310 is aligned with the objective lens fixing seat 300, the provided magnet pin 320 can be magnetically connected with the avoidance slot, so that the annular pressing block 310 and the objective lens fixing seat 300 can be fixed. When the annular pressing block 310 is fixed, the provided annular pressing strip a321 can abut against the outer wall of the annular extension plate 332, so that the annular pressing strip b330 can be fixed to the inner wall of the concave groove, so that the objective lens mounting seat 400 and the side extension plate 420 can be fixed in the concave groove.

[0032] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. An automatic zoom lens based on a stepping motor, comprising an inner cylinder (210), the outer wall of the inner cylinder (210) being rotatably connected to an outer sleeve (200), and a driving component for rotational driving being arranged on one side of the outer wall of the outer sleeve (200), characterized in that: An objective lens fixing seat (300) is installed at one end of the inner cylinder (210) away from the outer sleeve (200), an objective lens mounting seat (400) is installed at one end of the objective lens fixing seat (300) away from the inner cylinder (210), an objective lens main body (410) is embedded and fixed inside the objective lens mounting seat (400), and a fixing component for fixing the objective lens mounting seat (400) is provided on the objective lens fixing seat (300).

2. The automatic zoom lens based on a stepping motor according to claim 1, characterized in that: The driving component comprises a side mounting seat (100), the side mounting seat (100) being rotatably connected to one side of the outer wall of the outer sleeve (200), a stepping motor body (110) being mounted on the top end of the outer wall of the side mounting seat (100), and a driving gear (120) being mounted on the bottom end of the inner wall of the side mounting seat (100) via a rotating shaft.

3. The automatic zoom lens based on a stepping motor according to claim 2, characterized in that: A spline groove is provided at the upper end of the rotating shaft, and the output shaft at the bottom end of the stepper motor body (110) is configured as a spline shaft. The output shaft passes through the top end of the inner wall of the side mounting seat (100) and is spline-connected to the spline groove provided on the rotating shaft.

4. The automatic zoom lens based on a stepping motor according to claim 3, characterized in that: The bottom of the outer wall side end of the stepper motor body (110) is fixed to the top of the outer wall of the side mounting seat (100) by means of fixing bolts (111), and a transmission gear (130) is installed at the bottom of the outer wall side end of the outer sleeve (200) and at a position corresponding to the driving gear (120), and the driving gear (120) and the transmission gear (130) are meshed with each other.

5. The automatic zoom lens based on a stepping motor according to claim 1, characterized in that: The bottom end of the outer wall of the outer sleeve (200) is rotatably connected to a mounting seat, the fixing component comprises an annular pressing block (310), the annular pressing block (310) is mounted on the outer wall of the objective lens fixing seat (300) and on a side away from the outer sleeve (200), a concave groove is formed on the outer wall of one end of the objective lens fixing seat (300) close to the annular pressing block (310), and the objective lens fixing seat (400) is slidably mounted in the concave groove.

6. The automatic zoom lens based on a stepping motor according to claim 5, characterized in that: A side extension plate (420) is fixed to one end of the objective lens mounting seat (400) inserted into the concave groove, and the side extension plate (420) extends to the outside of the objective lens mounting seat (400). The outer wall of the side extension plate (420) is slidably connected to the inner wall of the concave groove, and the inner wall of the concave groove is provided with a spline pattern.

7. The automatic zoom lens based on a stepping motor according to claim 6, characterized in that: The inner wall of the concave groove and the upper end of the side extension plate (420) are spline-connected with an annular strip b (330), the outer wall of the annular strip b (330) is provided with a spline groove (331), the annular strip b (330) is in contact with the outer wall of the side extension plate (420), an annular extension plate (332) is fixed to one end of the annular strip b (330) away from the side extension plate (420) and located outside the concave groove, and the outer wall of the annular extension plate (332) overlaps with the outer wall of the objective lens fixing seat (300) and is located at the outer end of the concave groove.

8. The automatic zoom lens based on a stepping motor according to claim 7, characterized in that: A magnet pin (320) is fixed to the outer wall of the annular pressing block (310) and one end close to the objective lens fixing seat (300); a plurality of the magnet pins (320) are evenly arranged in an annular array; an outer wall of the objective lens fixing seat (300) and positions corresponding to the magnet pins (320) are provided with avoidance slots; and the outer walls of the magnet pins (320) are magnetically connected to the inner walls of the avoidance slots.

9. The automatic zoom lens based on a stepping motor according to claim 7, characterized in that: An annular pressure strip a (321) is fixed to the inner wall of the annular pressure block (310) and at a position corresponding to the annular pressure strip b (330), and the outer wall of the annular pressure strip a (321) away from the annular pressure block (310) is in contact with the outer wall of the annular extension plate (332).

Images