Illumination angle adjustable back light source and image measuring instrument

Abstract

The application provides an illuminating angle adjustable downlight source and an image measuring instrument, the downlight source comprises a bottom plate with a through hole arranged at the center, a plurality of light emitting mechanisms are arranged on the bottom plate and are uniformly distributed in the circumferential direction with the through hole as the center, the light emitting mechanism comprises an adjusting assembly and a lamp bead assembly, the lamp bead assembly comprises a lamp plate seat, a lamp plate rotatably arranged on the lamp plate seat and lamp beads mounted on the lamp plate, the adjusting assembly comprises a gear, an arc segment engaged with the gear, an adjusting block arranged on the arc segment, the arc segment is concentric with the through hole, the adjusting block performs a circumferential motion concentric with the through hole, the lamp plate is arranged on the arc segment, an external driving source drives the gear to rotate, drives the arc segment to move, the adjusting block on the arc segment pushes the lamp plate from the bottom of the lamp plate to rotate towards the through hole; through the above structure, the adjusting block is driven to push the lamp plate to rotate through the engagement of the gear and the arc segment to realize the change of the illuminating angle of the lamp bead, the flexibility of the downlight source is improved, the suitability is good, the efficiency is high and the cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine vision light source of image measuring instrument, and particularly relates to a fall light source with adjustable irradiation angle and an image measuring instrument. BACKGROUND

[0002] The image measuring instrument is a device for measuring the size and shape tolerance of a measured part by using machine vision technology, and is widely used in 3C, new energy, semiconductor and other precision manufacturing industries. In the process of part machining, the geometric dimension measurement and inspection of parts are very important. The measured part is placed on a workbench, and an image system is used to focus and take a picture of the measured size feature, and the geometric dimension measurement is completed through image processing. Usually, one or more circular fall light sources are provided for the lens of such a device, and the features of the measured object are clearly captured by the image system through the irradiation of the light source.

[0003] The fall light source used in the current market has a fixed angle, and the features of the measured workpiece are different. In order to make these features be clearly captured by the image system, the required light source irradiation angle is also different. For example, the hole size requires a high-brightness and vertically downward irradiation light source to make the features in the hole be clearly captured by the image system; the general outer contour size requires a general but uniform scattered light; the outer contour of the shaft workpiece requires a vertical light with appropriate brightness. Each kind of light source can measure limited features, and the features outside the capacity range can only replace the light source, which is a complex process and requires professional personnel to replace and debug the equipment. SUMMARY

[0004] The purpose of the present application is to provide a fall light source with adjustable irradiation angle and an image measuring instrument to solve the above problems.

[0005] The technical solution adopted by the present application is as follows:

[0006] A fall light source with adjustable irradiation angle, comprising a bottom plate with a through hole in the center, a plurality of light emitting mechanisms are arranged on the bottom plate and are evenly distributed in the circumferential direction with the through hole as the center, the light emitting mechanism comprises an adjusting assembly and a lamp bead assembly, the lamp bead assembly comprises a lamp plate seat, a lamp plate rotatably arranged on the lamp plate seat, and a lamp bead mounted on the lamp plate, the adjusting assembly comprises a gear, an arc segment with teeth engaged with the gear, the arc segment is provided with an adjusting block, the arc segment is concentric with the through hole, the adjusting block makes a circumferential motion concentric with the through hole, the lamp plate is arranged on the arc segment, when the gear is driven to rotate by an external driving source, the arc segment is moved, and the adjusting block on the arc segment pushes the lamp plate from the bottom of the lamp plate to make the lamp plate rotate towards the through hole.

[0007] As a further improved technical scheme of the present application, the height of the adjusting block relative to the base plate gradually increases from the direction of the lamp panel to the direction away from the lamp panel on the movement track of the adjusting block.

[0008] As a further improved technical scheme of the present application, a guide surface is arranged on the side of the lamp panel close to the adjusting block, and the guide surface pushes the lamp panel to guide the movement of the lamp panel.

[0009] As a further improved technical scheme of the present application, a protection surface is arranged on the end of the adjusting block away from the base plate, and the protection surface is an arc surface, which is used to prevent the end of the adjusting block from being scratched by the lamp panel.

[0010] As a further improved technical scheme of the present application, the lamp panel is made of a magnetic material, the lamp beads are magnetically attached to the lamp panel, and the lamp panel is attached to the adjusting assembly.

[0011] As a further improved technical scheme of the present application, the adjusting assembly further comprises a pressing plate arranged on the arc-shaped segment, a displacement portion is arranged on the side of the pressing plate close to the arc-shaped segment, the arc-shaped segment is clamped in the displacement portion, and the pressing plate limits the arc-shaped segment in the circumferential and axial directions.

[0012] As a further improved technical scheme of the present application, the pressing plate is arranged below the lamp panel, the top surface of the pressing plate is flush with the bottom surface of the lamp panel when the lamp panel is in the first state, and the pressing plate and the lamp panel are attached together to make the direction of the light projected by the lamp beads perpendicular to the base plate.

[0013] As a further improved technical scheme of the present application, the arc-shaped segments are connected together to form a gear ring, and the gear ring is used to synchronously adjust the lamp bead assemblies.

[0014] As a further improved technical scheme of the present application, a plurality of gear rings are arranged on the base plate, and connecting pieces are arranged between the gear rings to connect the gear rings together to make all the gear rings rotate synchronously.

[0015] An image measuring instrument comprises a camera and the above-mentioned illuminating angle adjustable drop light source, and the camera shoots and collects the light-illuminated measured object downward through the through hole.

[0016] The present application has the following beneficial effects:

[0017] Through the above structure, the adjusting block is driven to move through the meshing of the gear and the arc-shaped segment, the lamp panel is pushed to rotate by the adjusting block to change the illuminating angle of the lamp beads, the motor is used to steplessly adjust the illuminating angle of each lamp bead, the flexibility of the drop light source is improved, the applicability is good, the efficiency is high, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic diagram of the overall structure of the downlight;

[0019] Fig. 2 is a schematic diagram of the partial structure of the downlight;

[0020] Fig. 3 is a schematic diagram of the partial structure of the downlight;

[0021] Fig. 4 is a schematic diagram of the structure of the adjusting block;

[0022] Fig. 5 is a schematic diagram of the structure of the gear ring and the pressing plate;

[0023] Fig. 6 is a sectional view of the gear ring and the pressing plate.

[0024] Wherein: 100 - base plate, 101 - through hole, 200 - adjusting assembly, 201 - gear, 202 - adjusting block, 2021 - protection surface, 203 - pressing plate, 2031 - accommodation part, 204 - gear ring, 300 - lamp bead assembly, 301 - lamp plate seat, 302 - lamp plate, 3021 - guide surface, 303 - lamp bead, 400 - motor. DETAILED DESCRIPTION

[0025] The present application will be described in detail below with reference to the specific embodiments shown in the drawings. However, these embodiments do not limit the present application, and the structural, method, or functional changes made by those of ordinary skill in the art based on these embodiments are included in the protection scope of the present application.

[0026] If the present application involves orientation (for example, up, down, left, right, front, back, outside, inside, etc.) when described, the orientation involved needs to be defined, for example, "for the purpose of clearly expressing the position and direction described in the present application, the operator of the instrument is taken as a reference, the end close to the operator is the proximal end, and the end away from the operator is the distal end." Or define with paper as a reference. Of course, if in the subsequent description, the positional relationship between the two is defined by mutual reference, then it can not be defined here.

[0027] The "top", "bottom", "upper", "lower" described in the present application only refer to the orientation in the drawings, and do not represent the orientation when installed and used.

[0028] A downlight with adjustable illumination angle, such as Figs. 1-3As shown, it comprises a bottom plate 100 provided with a through hole 101 in the center, a plurality of light emitting mechanisms are evenly distributed on the bottom plate 100 in the circumferential direction and take the through hole 101 as the center, the light emitting mechanism comprises an adjusting assembly 200 and a lamp bead assembly 300, the lamp bead assembly 300 comprises a lamp plate seat 301, a lamp plate 302 rotatably arranged on the lamp plate seat 301, and a lamp bead 303 mounted on the lamp plate 302, the adjusting assembly 200 comprises a gear 201, a toothed arc segment engaged with the gear 201, the arc segment is provided with an adjusting block 202, the arc segment is concentric with the through hole 101, the adjusting block 202 makes a circumferential motion concentric with the through hole 101, the lamp plate 302 is erected on the arc segment, when the gear 201 is driven to rotate by an external driving source, the arc segment is driven to move, and the adjusting block 202 on the arc segment pushes the lamp plate 302 from the bottom of the lamp plate 302 to make the lamp plate 302 rotate towards the through hole 101.

[0029] The lamp plate 302 comprises a first state and a second state, the first state is that the lamp plate 302 is not pushed by the adjusting block 202, at this time the direction of the light projected by the lamp bead 303 on the lamp plate 302 is perpendicular to the bottom plate 100, the second state is that the lamp plate 302 is pushed and rotated by the adjusting block 202, at this time the direction of the light projected by the lamp bead 303 on the lamp plate 302 is inclined to the bottom plate 100.

[0030] The lamp plate 302 is made of magnetic material, the lamp bead 303 is magnetically adsorbed on the lamp plate 302, which saves cost, is convenient for replacement and maintenance, and avoids mutual interference. The lamp plate 302 is adsorbed on the adjusting assembly 200 to be suitable for actual use.

[0031] On the motion track of the adjusting block 202, the height of the adjusting block 202 relative to the bottom plate 100 gradually increases from the direction of the lamp plate 302 to the direction away from the lamp plate 302, thereby the adjustment of the height by which the bottom plate 100 is lifted by the adjusting block 202 realizes the adjustment of the angle of rotation of the lamp plate 302, in the embodiment, the adjusting block 202 can be a wedge-shaped block or a triangular pyramid.

[0032] As shown, Fig. 3 As shown, a guide surface 3021 is arranged on the side of the lamp plate 302 close to the adjusting block 202, the guide surface 3021 plays a guiding role in pushing the lamp plate 302 by the adjusting block 202, in the embodiment, the guide surface 3021 is a round corner to facilitate the lamp plate 302 being lifted by the adjusting block 202.

[0033] As shown, Fig. 4As shown in the adjustment block 202, the end away from the bottom plate 100 is provided with a protective surface 2021, which is an arc surface, and the protective surface 2021 is used to prevent the end of the adjustment block 202 from being too sharp so as to scratch the lamp plate 302 when in contact with the lamp plate 302, or cause the adjustment block 202 to wear and thus affect the adjustment range.

[0034] As shown in the adjustment block 202, the end away from the bottom plate 100 is provided with a protective surface 2021, which is an arc surface, and the protective surface 2021 is used to prevent the end of the adjustment block 202 from being too sharp so as to scratch the lamp plate 302 when in contact with the lamp plate 302, or cause the adjustment block 202 to wear and thus affect the adjustment range. Figs. 5-6 As shown, the adjustment assembly 200 further comprises a pressing plate 203 arranged on the arc-shaped segment, and the pressing plate 203 is used to limit the movement of the arc-shaped segment. Specifically, one side of the pressing plate 203 close to the arc-shaped segment is provided with a clearance portion 2031 matched with the arc-shaped segment, and the adjustment block 202 is arranged on the side of the arc-shaped segment away from the pressing plate 203. The other side of the arc-shaped segment is clamped in the clearance portion 2031, so as to realize the axial and circumferential limiting of the arc-shaped segment by the pressing plate 203, avoid the movement trajectory of the arc-shaped segment from deviating during movement, and improve the accuracy of adjustment.

[0035] The pressing plate 203 is arranged below the lamp plate 302. When the lamp plate 302 is in the first state, the top surface of the pressing plate 203 is flush with the bottom surface of the lamp plate 302, and the pressing plate 203 and the lamp plate 302 are adsorbed together so that the direction of the light projected by the lamp beads 303 is perpendicular to the bottom plate 100, so as to be suitable for the characteristics of the to-be-measured member which needs vertical light. When the lamp plate 302 is in the second state, the lamp plate 302 is adsorbed on the adjustment block 202.

[0036] As an embodiment of the present application, the lamp plate seat 301 comprises two support columns arranged on the bottom plate 100, and a rotating shaft is arranged between the two support columns, and one end of the lamp plate 302 is sleeved on the rotating shaft.

[0037] As an embodiment of the present application, the external driving source is a motor 400.

[0038] As an embodiment of the present application, a plurality of light emitting mechanisms are arranged on the bottom plate 100, and each gear 201 in each light emitting mechanism is respectively connected with a motor 400 to independently control and adjust each lamp bead 303.

[0039] As an embodiment of the present application, a plurality of arc-shaped segments are connected together in a head-to-tail manner to form a gear ring 204, and a plurality of lamp bead assemblies 300 are synchronously adjusted through the gear ring 204. At this time, only one of the gears 201 needs to be driven to realize the adjustment of the angles of all the lamp beads 303 on the gear ring 204.

[0040] As an embodiment of the present application, the bottom plate 100 is provided with a plurality of gear rings 204, and a plurality of connecting members are arranged between the plurality of gear rings 204 to connect the plurality of gear rings 204 together so that all the gear rings 204 rotate synchronously. At this time, only one of the gear wheels 201 needs to be driven to realize the angle adjustment of all the lamp beads 303.

[0041] The present application also provides an image measuring instrument, which comprises a camera and the above-mentioned illumination angle adjustable diffuse light source, and the camera shoots downward through the through hole 101 to collect the light-illuminated measured object.

[0042] Through the above structure, the gear wheel 201 drives the adjustment block 202 to move through the meshing with the arc segment, the adjustment block 202 pushes the lamp plate 302 to rotate to realize the change of the illumination angle of the lamp bead 303, and the illumination angle of each lamp bead 303 can be infinitely adjusted in a set range according to the characteristics of the measured object through the motor 400, which improves the flexibility of the diffuse light source, has good applicability, high efficiency, and saves the debugging cost of replacing the light source.

[0043] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0044] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A spot light source with adjustable illumination angle, characterized in that: The system includes a base plate (100) with a central through hole (101). The base plate (100) has several light-emitting mechanisms evenly distributed circumferentially around the through hole (101). Each light-emitting mechanism includes an adjustment component (200) and a lamp bead assembly (300). The lamp bead assembly (300) includes a lamp plate holder (301), a rotatable lamp plate (302) mounted on the lamp plate holder (301), and lamp beads (303) mounted on the lamp plate (302). The lamp plate (302) is made of magnetic material, and the lamp beads (303) are magnetically attached to the lamp plate (302). The lamp plate (302) is attached to the adjustment component (200). The adjustment component (200) includes a gear (201) and a mechanism meshing with the gear (201). The device has a toothed arc-shaped segment, on which an adjustment block (202) is provided. The arc-shaped segment is concentric with the through hole (101). The adjustment block (202) makes a circular motion concentric with the through hole (101). The lamp plate (302) is mounted on the arc-shaped segment. When the gear (201) is driven by an external drive source to rotate, it drives the arc-shaped segment to move. The adjustment block (202) on the arc-shaped segment pushes the lamp plate (302) from the bottom of the lamp plate (302) so that the lamp plate (302) rotates toward the through hole (101). On the movement trajectory of the adjustment block (202), the height of the adjustment block (202) relative to the base plate (100) gradually increases from the direction of the lamp plate (302) toward the direction away from the lamp plate (302).

2. The incident light source with adjustable illumination angle according to claim 1, characterized in that: A guide surface (3021) is provided on the side of the lamp plate (302) near the adjustment block (202), and the guide surface (3021) guides the adjustment block (202) to push the lamp plate (302).

3. The incident light source with adjustable illumination angle according to claim 1, characterized in that: A protective surface (2021) is provided at the end of the adjusting block (202) away from the base plate (100). The protective surface (2021) is an arc surface and is used to prevent the end of the adjusting block (202) from being scratched by the lamp plate (302).

4. The incident light source with adjustable illumination angle according to claim 1, characterized in that: The adjustment assembly also includes a pressure plate (203) disposed on the arc segment. The side of the pressure plate (203) near the arc segment is provided with a relief part (2031) that cooperates with the arc segment. The arc segment is locked in the relief part (2031). The pressure plate (203) limits the arc segment in both the circumferential and axial directions.

5. The incident light source with adjustable illumination angle according to claim 4, characterized in that: The pressure plate (203) is located below the lamp plate (302). When the lamp plate (302) is in the first state, the top surface of the pressure plate (203) is flush with the bottom surface of the lamp plate (302). The pressure plate (203) and the lamp plate (302) are attracted together so that the direction of the light projected by the lamp beads (303) is perpendicular to the base plate (100).

6. The incident light source with adjustable illumination angle according to claim 1, characterized in that: Several of the arc-shaped segments are connected end to end to form a toothed ring (204), and the toothed ring (204) is used to synchronously adjust several lamp bead assemblies (300).

7. The incident light source with adjustable illumination angle according to claim 6, characterized in that: The base plate (100) is provided with a plurality of toothed rings (204), and a connector is provided between the plurality of toothed rings (204) to connect the plurality of toothed rings (204) together so that all toothed rings (204) rotate synchronously.

8. An image measuring instrument, comprising a camera, characterized in that: The image measuring instrument further includes an incident light source with an adjustable illumination angle as described in any one of claims 1 to 7, and the camera captures images of the illuminated test piece through a through hole (101).

Images