CN208139036U - It is a kind of annular diffusion without shadow dome light source - Google Patents

Abstract

The utility model discloses a kind of annular diffusions without shadow dome light source, including shell, LED circuit board, light guide plate；The first inner hole is offered in the middle part of light guide plate, and top surface offers the square groove for crossing the first inner hole；The second inner hole is offered in the middle part of LED circuit board；Shell includes bottom plate and body, and bottom plate offers third inner hole；LED circuit board is set in shell, and face where LED is backwards to bottom plate；Light guide plate is located above LED circuit board, and is sticked in shell, the first inner hole, the second inner hole and the setting of third female coaxial.After the reflection that the light that LED circuit board issues passes through light guide plate, it forms the light of homogeneous soft and reflexes in the examined object being put in square groove, the curved surface of examined object surface-boundary is irradiated to completely, so that digital camera can take the image of shadeless examined object.The utility model has the advantages that object surface boundary surface can be irradiated to completely.

Description

It is a kind of annular diffusion without shadow dome light source

Technical field

The utility model relates to detect field of lighting devices more particularly to a kind of annular diffusion without shadow dome light source.

Background technique

Defects detection typically refers to the detection to article surface defect, is to use advanced mechanical vision inspection technology, right The defects of spot of body surface, pit, scratch, color difference, defect, is detected.

Dome light source is a kind of lighting apparatus used in defects detection, is overflow produced by dome light source in the prior art Reflection light can be with the surface of uniform irradiation object to be detected, but the surface-boundary for working as examined object is arc surface or curved surface When, the diffusing reflection light of existing dome light source can not be irradiated to the arc surface or curved surface on object surface boundary completely.Use number In word camera acquired image, the surface-boundary brightness irregularities of examined object, or even phenomena such as formation boundary dark space, from And cause software when analyzing image, the boundary of examined object in image can not be accurately grabbed, or even can not grab at all The boundary of examined object into image, causes software that examined object benchmark can not be accurately positioned.

Utility model content

For this reason, it may be necessary to provide it is a kind of annular diffusion without shadow dome light source, can not to solve dome light source in the prior art The problem of being irradiated to the arc surface or curved surface on object surface boundary completely.

To achieve the above object, inventor provide it is a kind of annular diffusion without shadow dome light source, including shell, LED circuit Plate, light guide plate；

The first inner hole is offered in the middle part of the light guide plate, and top surface offers the square groove for crossing the first inner hole, the side Slot extends to the side-walls of light guide plate；The second inner hole is offered in the middle part of the LED circuit board；The shell includes bottom plate and shell Body, the bottom plate offer third inner hole；

The LED circuit board is set in shell, and face where LED is backwards to bottom plate；The light guide plate is located at LED circuit board Top, and be sticked in shell, first inner hole, the second inner hole and the setting of third female coaxial.

Further, first inner hole is reverse frustoconic, and second inner hole and third inner hole are circle.

Further, the shell is cylindrical shape, and the bottom plate is circle, and the body is cylinder；Bottom plate is placed on shell In body, and fixed by installing screw.

Further, the LED circuit board is circle compatible with shell, and the peripheral shape of the light guide plate is and shell The compatible circle of body.

Further, the first bulge loop, the top of the bottom plate are provided at the first inner hole outer ring of the bottom surface of the light guide plate The second bulge loop compatible with the first bulge loop is provided at the outer ring of the third inner hole in face；First bulge loop passes through in second Hole, and be sleeved on outside the second bulge loop.

Further, the top surface of the light guide plate is flushed with the top surface of the body, the both ends of the surface of the body and square groove Rectangular targeting port is offered at face respectively, the size of the rectangular targeting port is consistent with the size of square groove end face.

Further, further include power supply line, the string holes that power supply source line passes through is offered at the body, the power supply line Output end passes through string holes, and connect with LED circuit board.

Further, further include heat conductive silica gel, the 4th inner hole is offered in the middle part of the heat conductive silica gel；The heat conductive silica gel It fits between bottom plate and LED circuit board.

It is different from the prior art, the diffusion of annular described in above-mentioned technical proposal is without shadow dome light source, including shell, LED electricity Road plate, light guide plate；The first inner hole is offered in the middle part of the light guide plate, and top surface offers the square groove for crossing the first inner hole, institute State the side-walls that square groove extends to light guide plate；The second inner hole is offered in the middle part of the LED circuit board；The shell includes bottom plate And body, the bottom plate offer third inner hole；The LED circuit board is set in shell, and the light guide plate is located at LED circuit It above plate, and is sticked in shell, first inner hole, the second inner hole and the setting of third female coaxial.What LED circuit board issued After the reflection that light passes through light guide plate, forms the light of homogeneous soft and reflex in the examined object being put in square groove, make The curved surface of examined object surface-boundary can be irradiated to completely, thus digital camera can successively penetrate third inner hole, Second inner hole and the first inner hole take the image of shadeless examined object, and realization can be irradiated to object surface side completely Boundary's curved surface.

Detailed description of the invention

Fig. 1 is structure chart of the annular diffusion without shadow dome light source that an embodiment of the present invention is related to；

Fig. 2 is explosive view of the annular diffusion without shadow dome light source that an embodiment of the present invention is related to；

Fig. 3 is explosive view of the annular diffusion without shadow dome light source that another embodiment of the utility model is related to.

Description of symbols：

1, bottom plate；

10, third inner hole；

11, the second bulge loop；

2, body；

20, rectangular targeting port；

3, LED circuit board；

30, the second inner hole；

4, light guide plate；

40, the first inner hole；

41, the first bulge loop；

42, square groove；

5, screw is installed；

6, power supply line.

Specific embodiment

Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality It applies example and attached drawing is cooperated to be explained in detail.

Please refer to Fig.1 to Fig.3, the utility model provide it is a kind of annular diffusion without shadow dome light source, for being carried out to object Light source is provided when defects detection, in the particular embodiment, annular diffusion without shadow dome light source include shell, LED circuit board 3, Light guide plate 4.For the shell for putting LED circuit board 3 and light guide plate 4, the LED circuit board 3 is described to lead for providing light source Tabula rasa 4 also referred to as diffuses light guide plate, for by light homogeneous soft, the non-uniform light of the graininess that LED circuit board 3 issues to be passed through After crossing the diffusing reflection coating reflection of 4 outer surface of light guide plate, the light of homogeneous soft will form.

In the particular embodiment, the shell includes bottom plate 1 and body 2, and the bottom plate 1 surrounds one with body 2 and is used for Place the accommodation groove of LED circuit board 3 and light guide plate 4.It can generate heat since 3 working time of LED circuit board is long, the bottom plate 1 and body 2 be made of aluminium alloy, the temperature that LED circuit board 3 generates can be perforated to bottom plate 1 made of aluminium alloy in this way At body 2, heat dissipation can be played the role of, prevent 3 temperature of LED circuit board excessively high and burn out.

In a further embodiment, the bottom plate 1 can be circle, and correspondingly, the body 2 is then cylinder, shell The cross section of body 2 is then circular ring shape.The cross section for being set to the intracorporal LED circuit board 3 of shell and light guide plate 4 simultaneously is also circle, It is such to be arranged so that LED circuit board 3 and light guide plate 4 are placed into shell.

In the particular embodiment, the LED circuit board 3 is set in shell, and face where LED is backwards to bottom plate 1；It is described Light guide plate 4 is located at 3 top of LED circuit board, and is sticked in shell.It is such to be arranged so that LED circuit board 3 and light guide plate 4 It is arranged with face, the light that LED circuit board 3 issues can pass through light guide plate 4, so that the graininess that LED circuit board 3 issues Uneven light can become the light of homogeneous soft.

In the particular embodiment, the bottom plate 1 offers third inner hole 10, and the LED circuit board 3 offers in second Hole 30, the light guide plate 4 offer the first inner hole 40, and the first inner hole 40, the second inner hole 30 and third inner hole 10 are coaxially disposed.? When being diffused using this annular without shadow dome light source, the digital camera for shooting examined object is located at bottom plate 1, digital camera Camera lens and 1 face of bottom plate, digital camera successively penetrates third inner hole 10, the second inner hole 30, the first inner hole 40, can take Examined object is in image when detecting state.

In the particular embodiment, the top surface of the light guide plate 4 offers the square groove 42 for crossing the first inner hole 40, the side Slot 42 is for placing examined object.LED circuit board 3 issue light through the light guide plate 4 reflection, be irradiated to and be placed in square groove 42 At each surface of interior examined object, so that examined object surface is curved surface or non-curved, can be uniform Ground is irradiated to, the examined object surface-boundary brightness uniformity in the picture of digital camera shooting.The square groove 42, which extends to, leads The side-walls of tabula rasa 4, such setting pierce into multiple examined objects successively from one end of square groove 42, then from square groove 42 other end is pierced by, and the time of replacement examined object is reduced, so as to improve the efficiency of inspection.

In a further embodiment, first inner hole 40 is reverse frustoconic, and such setting is so that 4 anti-through the light guide plate The light penetrated can more reflex to the boundary on examined object surface, so that the object to be detected of digital camera shooting In image when body is in detecting state, the surface-boundary brightness uniformity of examined object.For the shape with the first inner hole 40 It is adapted, second inner hole 30 and third inner hole 10 are circle.It then will not influence digital camera shooting image in this way.

In a further embodiment, the shell is cylindrical shape, and the bottom plate is circle, and the body is cylinder； Bottom plate is placed in body 2, and fixed by installation screw 5.Specifically, it is opened at the shell wall of the side of the bottom plate and body 2 Equipped with threaded hole, the bottom plate is placed in body 2, and the threaded hole of the threaded hole of bottom plate and body 2 is overlapped, then by mounting screw Successively revolve in the threaded hole of bottom plate and the threaded hole of body 2.It in this way can be fixed by bottom plate and body 2.

For lightguide plate fixing 4, in a further embodiment, 40 outer ring of the first inner hole of the bottom surface of the light guide plate 4 Place is provided with the first bulge loop 41, is provided at the outer ring of the third inner hole 10 of the top surface of the bottom plate and is adapted with the first bulge loop 41 The second bulge loop 11；First bulge loop 41 passes through the second inner hole 30, and is sleeved on outside the second bulge loop 11.It is such setting so that Light guide plate 4 can be fixed in shell, when needing replacing LED circuit board 3, light guide plate 4 can be separated with bottom plate, Ji Kegeng Change the LED circuit board 3 being sandwiched between bottom plate and light guide plate 4.

In a further embodiment, the top surface of the light guide plate 4 is flushed with the top surface of the body 2, the body 2 with Rectangular targeting port 20, the size of the rectangular targeting port 20 and 42 end face of square groove are offered at the both ends of the surface face of square groove 42 respectively Size it is consistent.It is such to be arranged so that shell interfere examined object to pierce into or be pierced by square groove 42.

In a further embodiment, further include power supply line 6, the line that power supply source line 6 passes through is offered at the body 2 The output end in hole, the power supply line 6 passes through string holes, and connect with LED circuit board 3.It is such to be arranged so that LED circuit board 3 With electrified light emitting.

It further include heat conductive silica gel in a further embodiment to further be that LED circuit board 3 radiates, it is described to lead The 4th inner hole is offered in the middle part of hot silica gel；The heat conductive silica gel fits between bottom plate and LED circuit board 3.Such setting The temperature that the work of LED circuit board 3 is generated is conducted heat conductive silica gel to shell made of aluminium alloy, realizes heat dissipation Purpose.

It should be noted that being not intended to limit although the various embodiments described above have been described herein The scope of patent protection of the utility model.Therefore, based on the innovative idea of the utility model, embodiment described herein is carried out Change and modification or equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly Or above technical scheme is used in other related technical areas indirectly, it is included in the patent protection model of the utility model Within enclosing.

Claims (8)

1. a kind of annular diffusion is without shadow dome light source, which is characterized in that including shell, LED circuit board, light guide plate；

The first inner hole is offered in the middle part of the light guide plate, and top surface offers the square groove for crossing the first inner hole, the square groove prolongs Extend to the side-walls of light guide plate；The second inner hole is offered in the middle part of the LED circuit board；The shell includes bottom plate and body, The bottom plate offers third inner hole；

The LED circuit board is set in shell, and face where LED is backwards to bottom plate；The light guide plate is located in LED circuit board Side, and be sticked in shell, first inner hole, the second inner hole and the setting of third female coaxial.

2. annular diffusion according to claim 1 is without shadow dome light source, which is characterized in that first inner hole is inverted round stage Shape, second inner hole and third inner hole are circle.

3. annular diffusion according to claim 1 is without shadow dome light source, which is characterized in that the shell is cylindrical shape, institute Bottom plate is stated as circle, the body is cylinder；Bottom plate is placed in body, and is fixed by installing screw.

4. annular diffusion according to claim 3 is without shadow dome light source, which is characterized in that the LED circuit board is and shell The compatible circle of body, the peripheral shape of the light guide plate are circle compatible with shell.

5. annular diffusion according to claim 1 is without shadow dome light source, which is characterized in that the of the bottom surface of the light guide plate It is provided with the first bulge loop at one inner hole outer ring, is provided at the outer ring of the third inner hole of the top surface of the bottom plate and the first bulge loop phase Second bulge loop of adaptation；First bulge loop passes through the second inner hole, and is sleeved on outside the second bulge loop.

6. annular diffusion according to claim 1 is without shadow dome light source, which is characterized in that the top surface of the light guide plate and institute The top surface for stating body flushes, and offers rectangular targeting port at the both ends of the surface face of the body and square groove respectively, described rectangular to lead Size to mouth is consistent with the size of square groove end face.

7. annular diffusion according to claim 1 is without shadow dome light source, which is characterized in that it further include power supply line, the shell It is in and offers the string holes that power supply source line passes through, the output end of the power supply line passes through string holes, and connect with LED circuit board.

8. annular diffusion according to claim 1 is without shadow dome light source, which is characterized in that it further include heat conductive silica gel, it is described The 4th inner hole is offered in the middle part of heat conductive silica gel；The heat conductive silica gel fits between bottom plate and LED circuit board.