JP6554235B2 - Defect point detection instrument - Google Patents

Description

The present invention also relates again and again suitable defective portion detector to discover defective portion wound or distortion of the surface of the object to be detected.

  A technique shown in FIG. 7 is known as one of methods for inspecting the presence or absence of this type of defective portion (see, for example, Patent Document 1). In this inspection method 100, when a fine scratch is almost uniformly formed on the surface of the direct press product 101 by blasting and then the direct press product 101 is irradiated with light from the light source 103, the internal defect 102 does not exist. The transmitted light and the reflected light on the surface of the direct press product 101 become substantially uniform, and when the internal defect 102 is present, the transmitted and reflected light on the surface of the direct press product 101 is distorted. It is a thing.

  According to this inspection method 100, if the transmitted light and the reflected light on the surface of the direct press product 101 are distorted, it can be judged that the internal defect 102 is present, so the inspection of the internal defect 102 can be facilitated.

JP 2001-296204 A

  However, in the inspection method 100 disclosed in Patent Document 1, since the light source 103 is a slide projector, it has an area in the light emitting part, and the emitted illumination light is in a diffused state. In some cases, the irregularly reflected light cannot be detected sufficiently, and this causes a problem that the detection accuracy of the scratches is lowered.

  Moreover, since the light source 103 is a slide projector, the inspection method 100 disclosed in Patent Document 1 is bulky, can not be carried, and can not be used in a narrow place.

The present invention has been made in view of the conventional problems as described above. One object of the present invention is to provide a suitable defective portion detector device to discover defective portion wound or distortion of the surface of the object to be detected.

Means for Solving the Problems and Effects of the Invention

According to the defect location detection tool according to the first aspect of the present invention, the light source moves relative to the object to be detected while facing the object to be detected, and emits light to the object to be detected In the defective part detection instrument for detecting a defective part such as a scratch or a distortion on the detected object by confirming reflected light of the light irradiated to the detected object from the light source, A heat sink that has a flat plate-shaped portion that is long in the direction and has a rectangular cross section perpendicular to the long direction, and that dissipates heat generated in the substrate, and a first surface that is an upper surface of the flat plate-shaped portion of the heat sink A first substrate having a lighting circuit disposed along the longitudinal direction, a first LED provided on the front surface of the first substrate, the first substrate, and the first LED; A first LE having a first cover made of a translucent material to be accommodated A second substrate having a lighting circuit disposed on the second surface facing the first surface of the plate-shaped portion of the heat sink and the light source portion, along the longitudinal direction, the front surface of the second substrate A second LED light source portion having a long semi-tubular second cover made of a translucent material accommodating the second substrate and the second substrate, and the first LED A sighting unit that linearly irradiates light from the light source unit along the long direction of the heat sink, a power supply unit that supplies power to the first LED light source unit and the second LED light source unit, and a long length of the heat sink And a grip portion extending in a direction and accommodating the power supply portion. According to the above configuration, the side of the first LED light source unit to which the linear light is irradiated when the inspection is performed, the second LED light source unit side capable of illuminating a wide range when using as a work lamp Can be selected and used according to the application.

  In addition, using the first LED that emits straight directional light as the light source, the aiming unit determines the direction from which the light from the first LED light source unit is linear along the length direction of the heat sink Since the straight light of the first LED penetrates the flaw of the detection subject and irregular reflection changes the contrast of the flaw part and it becomes distorted, it was found It will be easier. Furthermore, since it becomes possible to identify minor differences between normal and defective parts, the scope of repair becomes clear, the user's repair accuracy is improved, and good repair can be achieved.

  Furthermore, since the power supply unit is provided, the defective portion detection instrument can be carried and work can be performed even in the absence of a power source. In addition, it is possible to irradiate the operator's desired position with the grip portion.

  Furthermore, since the overall shape is elongated in the shape of a saber, the grip portion can be inserted into a narrow gap and can be used in a narrow work place.

According to the defective part detection instrument according to the second aspect of the present invention, the first cover can be detachably attached to the heat sink. According to the said structure, a different function can be given to a defect location detection instrument by changing to the cover with a different function.

According to the defective portion detection instrument according to the third aspect of the present invention, the first cover is replaced with a third cover that is set to have at least one of the number of irradiations, or the irradiation interval, the irradiation light width, and the irradiation color. It can be provided as possible. According to the above configuration, the user can change the number and color of the light to be irradiated only by replacing the cover, so that the user can easily use the irradiation light according to the application.

According to the defect location detection tool according to the fourth aspect of the present invention, the sighting part is configured to make the light from the first LED light source part into at least two parallel straight lines along the longitudinal direction of the heat sink A light impermeable portion for shielding light and a light transmitting portion for transmitting light, so as to irradiate and further linearly irradiate the light from the first LED light source portion along the longitudinal direction of the heat sink; The first cover and the third cover may include an irradiation number setting unit that sets the number of light emitted from the aiming unit. According to the above configuration, when the user irradiates at least one linear light parallel to each of the normal portion and the defective portion of the detection target, the light from the irradiation surface having no defective portion such as a scratch or a distortion is regularly emitted. Reflected light and irregular reflected light from the irradiated surface with defects such as flaws or distortions are lined up on the surface of the object to be detected, so that the irregularly reflected part is prominent and the user is more clearly It is possible to recognize a defective part. Moreover, the user can change the number of the light to irradiate according to a use. Furthermore, since the number of irradiations, the irradiation interval, and the irradiation light width can be set by changing the line width and interval between the light non-transmissive part and the light transmission part, the number of irradiations or the irradiation interval and the irradiation light width can be set. Different defective point detection instruments can be easily manufactured.

According to the defective part detection instrument which concerns on the 5th side surface of this invention, it can comprise so that the light set in the said irradiation number setting part may be two linear light in parallel. According to the above configuration, when the user irradiates two straight light beams that are parallel to each of the normal portion and the defective portion of the detection target, regular reflected light and irregular reflected light are generated. line up. When the regularly reflected light and the irregular reflected light are arranged in this manner, the irregularly reflected portion stands out, so that the user can recognize the defective portion more clearly. When explaining the range of the defective part to the customer, the range of the defective part can be clearly shown, so that it is easy to obtain the customer's consent.

According to the defect location detection tool according to the sixth aspect of the present invention, the first cover further includes the first cover and the third cover, and the light transmits the color of the light of the first LED. And the irradiation color change part which changes to the color according to the color of the said 3rd cover can be provided. According to the said structure, since the color of irradiation light can be changed according to the color of a to-be-detected body, the visibility of the reflected light reflected by a to-be-detected body can be improved. Moreover, since the color of irradiation light can be changed with the combination of the color of 1st LED, and the color of a cover, the defect location detection instrument from which irradiation color differs can be manufactured easily.

According to the defective part detection instrument according to the seventh aspect of the present invention, both the first LED and the second LED are turned off, only the first LED is turned on, and only the second LED is turned on. A switch may be provided to switch ON / OFF of the power supplied from the power supply unit so as to be in the one state. According to the configuration, the user can select the side on which the LED is turned on or off.

It is an external view which shows the 1st illumination surface of the defective location detection instrument to which this invention is applied. It is an external view which shows the 2nd illumination surface of the defective location detection instrument to which this invention is applied. It is AA 'sectional drawing in FIG. 1A. It is a perspective view which shows the state which removed the end cap of the LED light source of the defect location detection instrument to which this invention is applied. It is a perspective view which shows the state which removed the end cap of the LED light source of the defect location detection instrument to which this invention is applied. It is explanatory drawing about the usage method of the defect location detection instrument to which this invention is applied. FIG. 6A is a view showing the appearance of the case where the inspection illumination is not applied to the defect location, for explaining how the defect location is viewed by the defect location detecting instrument to which the present invention is applied. Is a diagram showing the appearance when the inspection illumination is applied to the defect, and the appearance when the defect detection tool is applied from the left side to the right of the detection object in the order of FIG. 6B to FIG. 6F FIG. It is explanatory drawing about the inspection method of the conventional defect location.

Hereinafter, embodiments of the present invention will be described based on the drawings. However, the embodiment described below is an example for embodying the technical idea of the present invention, and the present invention is not limited to the following. Further, the present specification does not in any way specify the members described in the claims to the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention unless otherwise specified, and are merely explanations. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for the sake of clarity. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can be shared and realized.
(Configuration of defective part detection instrument 1)

The external view which shows the whole structure of the defect location detection instrument 1 which concerns on one Embodiment of this invention is shown to FIG. 1A and FIG. 1B, and sectional drawing which shows the cross section of a elongate direction is shown in FIG. As shown to these figures, when using the 1st LED light source part 3 which irradiates light to to-be-detected body CA, and a working lamp as a test | inspection illumination used when testing a defect location detection instrument 1 As the work lamp illumination used for the heat sink 2 for radiating the heat emitted from the second LED light source unit 4, the first LED light source unit 3, and the second LED light source unit 4 that irradiates the detection object CA with light. And a cylindrical grip part 5 connected to one end of the heat sink 2, and an end cap 6 provided at the opposite end of the grip part 5 of the first LED light source part 3 and the second LED light source part 4. It is provided as a main part.
(Heat sink 2)

The heat sink 2 is made of a light material having high thermal conductivity, such as aluminum, and has a long shape in one direction and a substantially H-shaped cross section perpendicular to the long direction, as shown in FIGS. Have. This heat sink 2 has a flat plate-shaped portion 21 corresponding to the H-shaped horizontal bar portion, and has a rectangular cross section perpendicular to the longitudinal direction, and the upper surface of the flat plate-shaped portion 21 corresponding to the upper surface of the H-shaped horizontal bar portion. (Corresponding to an example of “first surface” in the claims), the lower surface of the flat plate-shaped portion 21 is in close contact with the back surface of the first substrate 31 described later and further corresponds to the lower surface of the H-shaped horizontal bar portion. (This corresponds to an example of the “second surface” in the claims.) The first substrate 31 and the second substrate 41 are provided so as to be in close contact with the back surface of the second substrate 41 described later. The heat conducted from the contact surface can be efficiently released through the heat radiation portions 22a to 22b corresponding to the H-shaped vertical bar portions. Further, first groove portions 23a to 23b for fitting to a first cover 33 described later and second groove portions 24a to 24b for fitting to a second cover 43 described later are provided.
(First LED light source 3)

As shown in FIGS. 2 and 3, the first LED light source unit 3 is provided so that the upper surface and the back surface of the flat plate-shaped portion 21 of the heat sink 2 are in close contact with each other, and a first substrate 31 that supports a first LED 32 described later; A first LED 32 provided so as to be in close contact with the front surface of the first substrate 31, and the translucency that accommodates the first substrate 31 and the first LED 32 and is attached to the first grooves 23 a to 23 b of the heat sink 2. A long first cover 33 made of a material is provided as a main part.
(Second LED light source unit 4)

2 and 3, the second LED light source unit 4 is provided so that the lower surface and the back surface of the flat plate-shaped portion 21 of the heat sink 2 are in close contact with each other, and a second substrate 41 that supports a second LED 42 described later, The second LED 42 provided so as to be in close contact with the front surface of the second substrate 41, and the translucent property that accommodates the second substrate 41 and the second LED 42 and is attached to the second grooves 24 a to 24 b of the heat sink 2. A long second cover 43 made of a material is provided as a main part.
(substrate)

  The first substrate 31 has a first LED lighting circuit 311 (not shown) for lighting the first LED 32. For example, a wiring pattern is formed on a main body made of glass epoxy resin. The main body of the first substrate 31 may have heat dissipation properties such as aluminum, ceramic and glass.

  In addition, the first substrate 31 has the first LED 32 mounted on the front surface, and is provided on the surface of the flat plate-shaped portion 21 of the heat sink 2 so that the back surface is in close contact with the heat sink 2. Therefore, the heat generated in the first LED lighting circuit 311 is released through the first substrate 31 and the heat sink 2.

The second substrate 41 can be configured on the back surface of the flat plate-shaped portion 21 in the same manner as the first substrate 31. The first substrate 31 and the second substrate 41 receive power from the power supply unit 51 by a switch described later. By switching, ON / OFF is controlled.
(LED)

  The first LED 32 is, for example, a 5 mm × 5 mm rectangular chip as shown in FIGS. 2 and 3. The first LED 32 has a structure in which, for example, a light emitting diode chip of blue or shorter wavelength is covered with a phosphor, and emits white light. In addition, the 1st LED 32 should just be a magnitude | size which fits on the 1st board | substrate 31, and is not limited to the said magnitude | size.

  In addition, the first LEDs 32 are, for example, 50 on the upper surface of the first substrate 31 with respect to the first LED light source unit 3 having a longitudinal direction of 600 mm, and in two linear rows along the longitudinal direction The heat generated during light emission is conducted to the heat sink 2 via the first substrate 31 and is emitted therefrom. In addition, the number of 1st LED32 should just ensure the brightness | luminance which can find the defective location DF on the to-be-detected body CA, and can be changed suitably. Alternatively, the first LEDs 32 may be arranged in a row in a straight line along the longitudinal direction of the heat sink 2, and two straight rays of light may be irradiated by coating the first cover 33. Therefore, the first LED 32 can play a role of “the number of irradiation setting unit” in the claims.

  The first LED 32 can be composed of LEDs of a plurality of colors corresponding to RGB. If the first LED lighting circuit 311 includes a circuit for lighting the LED selected to be the desired light color, and the user can select the desired light color with the switch 55 described later, the user can operate the switch 55. The defective part detection instrument 1 can irradiate light of a color with good visibility according to the detection object CA. Therefore, the first LED 32 can play the role of the “irradiation color changer” in the claims.

The second LED 42 can have the same configuration as the first LED 32. Further, using a lens, the light from the first LED 32 may be distributed at a narrow angle, and the light from the second LED 42 may be distributed at a wide angle.
(First cover 33)

  The first cover 33 is made of a resin such as polycarbonate or glass, etc., and is long, in a substantially semicircular shape in cross section having an opening along the long direction, as shown in FIGS. The first substrate 31 and the first LED 32 were covered by detachably fitting the first side end portions 331 a to 331 b (transverse direction end portions) to the first groove portions 23 a to 23 b provided in the heat sink 2. It is attached to the heat sink 2 in a state. The shape of the first cover 33 is not limited to the above shape, and may be a flat plate shape as shown in FIG. 4.

  In addition, the first cover 33 is a circumferential surface of the first cover 33 so that linear light is emitted along the longitudinal direction of the heat sink 2, and for example, right and left in a cross-sectional view perpendicular to the longitudinal direction At intervals of about 5 to 9 mm, preferably 7 mm at symmetrical positions, a light transmitting portion 332 which is a non-painted portion which is linear, for example, 2 to 3 mm wide, is formed along the longitudinal direction of the heat sink 2 As described above, the light-impermeable portion 333 is provided on a peripheral surface other than the light-transmissive portion 332 by applying a light-impermeable epoxy resin paint. As a result, direct light from the first LED 32 is blocked except at the light transmitting portion 332, and diffused light in various directions disappears, and transmitted light with higher linearity is transmitted from the light transmitting portion 332 to the detection target CA. It is irradiated against. The transmitted light is irregularly reflected at the defective portion DF such as a flaw or a strain when irradiated to the object to be detected CA, so the contrast between the defective portion DF and the normal portion becomes clear, and the surface of the detected object CA It is possible to accurately detect the defective portion DF. The width and interval of the painted portion are not limited to the above dimensions, and can be appropriately changed in accordance with the detection object CA. That is, the first cover 33 can play a role of the “number of irradiation setting unit” in the claims.

  The first cover 33 is easily attached and removed by removing the end cap 6 and sliding the first side end portions 331a to 331b along the first groove portions 23a to 23b provided in the heat sink 2 be able to. Thus, since the 1st cover 33 is provided so that attachment or detachment is possible, it can replace | exchange. By replacing the cover that is compatible with the previously attached cover and has a different function, the defect point detection device 1 can have another function.

  For example, if the method of applying the light impermeable epoxy resin paint is changed, it is possible to manufacture many types of covers having different numbers, widths, and intervals of the light transmitting portions 332. When the inspection object or inspection item is different, the number of irradiations, the irradiation interval, and the irradiation light width can be easily changed by replacing the first cover 33, and the visibility can be easily improved.

  In addition, the first cover 33 can change the color of the transmitted light. For example, if a colored light transmission part 332 is prepared, light different from the color of the LED can be irradiated. That is, it is possible to irradiate light of a color with good visibility according to the detection object CA only by replacing the cover. Therefore, the first cover 33 can play the role of the “irradiation color changing unit” in the claims.

  As described above, the number of irradiations, or the irradiation interval, the irradiation light width, and the irradiation color can be set by the cover, so that parts other than the cover can be made common, so that the manufacturing line can be made common, and the product Can be manufactured inexpensively. If a cover with various functions is attached and sold, it can be used for various purposes.

In addition, the light transmission part 332 should just have the width | variety which can make the direct light from LED into the transmitted light with higher straightness, and is not limited to the said width | variety. In addition, the light-impermeable portion 333 may be another resin coating or a light-impermeable tape, and is not limited to the above materials. In addition, a shielding material such as metal may be used as the material of the light impermeable portion 333 itself.
(Second cover 43)

The second cover 43 is made of a resin such as polycarbonate, glass, or the like, and is long and has a substantially semicircular shape in cross-sectional view having an opening along the longitudinal direction. As shown in FIGS. By fitting the second side end portions 431a to 431b (end portions in the short direction) into the second groove portions 24a to 24b provided in the heat sink 2, the heat sink is covered with the second substrate 41 and the second LED 42. 2 is attached.
(Grip part 5)

As shown in FIGS. 1 and 2, the grip 5 has a cylindrical shape extending from one end of the first LED light source 3 and the second LED light source 4, and includes a power supply 51 and a control printed circuit board 52. (Not shown), a housing 53, and a lid 54.
(Power supply unit 51)

The power supply unit 51 is, for example, a lithium ion battery with an overcharge protection circuit which can be charged separately by a charger. In the present embodiment, the 18650 type is adopted for the lithium ion battery.
(Control printed circuit board 52)

The control printed circuit board 52 controls light emission ON / OFF of the first LED 32 and the second LED 42 via a switch 55 described later.
(Case 53)

The housing 53 is made of, for example, resin, includes a switch 55, and houses the power supply unit 51 and the control printed circuit board 52.
(Switch 55)

  The switch 55 is, for example, a slide-type switch 55 for selecting “OFF”, “ON of the first LED”, and “ON of the second LED”. When "lighting of the first LED" is selected, the control printed circuit board 52 controls the power supply unit 51 to supply power to the first LED lighting circuit 311 to light the first LED 32 if it is not lighted. . If the second LED 42 is on, the control printed circuit board 52 supplies power from the power supply unit 51 to the first LED lighting circuit 311 to light the first LED 32 and supplies power to the second LED lighting circuit 411. The second LED 42 is controlled to be turned off.

  In addition, when “lighting of the second LED” is selected, the control printed circuit board 52 supplies power from the power supply unit 51 to the second LED lighting circuit 411 so as to light the second LED 42 if it is not lighted. Control. When the first LED 32 is lit, the control printed circuit board 52 supplies power from the power supply unit 51 to the second LED lighting circuit 411 to light the second LED 42 and also supplies power to the first LED lighting circuit 311. The first LED 32 is controlled to be extinguished.

On the other hand, when turning off is selected, the control printed circuit board 52 is controlled to stop supplying power to the first LED lighting circuit 311 or the second LED lighting circuit 411 and turn off the first LED 32 or the second LED 42. Ru.
(Lid 54)

The lid 54 is made of, for example, a resin, and is provided at an end of the grip 5 opposite to the first LED light source 3 so that the power source 51 can be inserted into and removed from the housing 53. The lid 54 may be provided integrally with the housing 53, and is not limited to the above configuration.
(End cap 6)

The end cap 6 is made of, for example, a resin, and uses the same end cap 6 as a general straight tube LED lighting or a straight tube fluorescent light, and the first LED light source unit 3 and the second LED light source unit 4 Is provided at the end opposite to the grip portion 5.
(How to use at the time of the detailed inspection of the defect location detection instrument 1)

  Next, a method of using the defective portion detection instrument 1 according to the embodiment of the present invention will be described with reference to FIGS. FIG. 5 is an explanatory view of a method of using the defective portion detection instrument 1 to which the present invention is applied, and FIG. 6 is an explanatory view of how the defective portion DF is viewed by the defective portion detection instrument 1 to which the present invention is applied. is there.

  First, as shown in FIG. 5, the user holds the grip portion 5 and sets the switch 55 to “lighting of the first LED”. The first LED light source unit 3 is positioned with an easy-to-see distance so that the light from the first LED is irradiated at a right angle to the detection object CA, and the defect point is matched with the light ray Detection of DF can be performed. In addition, when the defect location detection instrument 1 is positioned vertically to the ground, the line of sight is vertically moved, and the defect location detection instrument 1 is moved in the left-right direction along the detection object CA. In addition, when the defect location detection device 1 is positioned parallel to the ground, the line of sight is run in the left-right direction, and the defect location detection device 1 is moved vertically along the detected object CA. Since the straight-ahead light from the first LED 32 is irradiated through the light transmission part 332, it becomes two lines and is irradiated to the detection object CA, and the irradiated light is on the surface of the detection object CA It becomes reflected light.

  At this time, if there is no scratch or distortion on the surface of the detection object CA, the light is reflected at a regular reflection angle as shown in FIG. 6A.

  When there is a flaw or distortion on the surface of the detection subject CA, as shown in FIG. 6B to FIG. 6F, the straight light from the first LED 32 enters the flaw and irregular reflection thereof causes Since the contrast changes and the irregularly reflected light appears to be distorted, scratches and distortion can be easily visually recognized.

  Further, as shown in FIG. 6E, one of the two lines is applied to the portion on the surface of the detection subject CA where there is no flaw or distortion, and the other is applied to the portion on the surface of the detection subject CA where there is scratch or distortion Then, the light hitting the part without scratches or distortion is regularly reflected, and the light hitting the part with scratches or distortion is reflected irregularly. By arranging regularly reflected light and irregular reflected light, irregular reflection stands out and it becomes easy to find a slight distortion. In addition, the range of scratches and distortions can be clearly shown.

When used in a car repair shop or the like, vehicles of various types and colors are brought in one after another, so there are cases where it is desired to emit light suitable for each vehicle. In such a case, the first cover 33 is removed and a third cover having a different number of irradiations, irradiation intervals, irradiation light widths, and colors is attached and used. Can increase the sex. In addition, although the color of irradiation light is effective irrespective of the color of the to-be-detected body CA, yellow and white are not limited to these colors.
(The third cover installation method of defective part detection instrument 1)

Next, a method for attaching the third cover will be described. First, the end cap 6 is removed, and the first side end portions 331 a to 331 b of the first cover 33 are slid and removed along the first groove portions 23 a to 23 b of the heat sink 2. The first side end portions 331a to 331b of the third cover are attached by sliding along 23b. When the third cover is attached, the end cap 6 is attached.
(How to use the wide area inspection of defective part detection tool 1)

  In conducting inspections, in addition to looking at small depressions, there are many cases where one wants to inspect a large area at once, or work lights are required to carry out repairs following the inspection. In such a case, the user can use the second LED light source unit 4. If the switch 55 is set to “light on the second LED” and the grip 5 is held, or if it is put on a wall, placed on the floor, etc., the second LED light source unit 4 is directed to the detected object CA The detection instrument 1 can widely illuminate the detection target CA.

  Unlike the first LED light source unit 3, since light is irradiated over a wide area, the operator's hand can be sufficiently illuminated. In addition, it is not necessary to prepare a work light and an inspection device separately, and since a power source is built in, it is suitable for work in a small space.

  As described above, according to the defect location detection instrument 1, the defect location DF can be found easily and clearly by aligning the illumination light emitted from the light source in the form of two straight lines, and the inspection Since the apparatus and the work lamp are integrated and portable, the defective portion detection instrument 1 that can be easily used even in a narrow place can be provided. In the present embodiment, scratches and distortions are given as examples of defective portions, but of course, the present invention is not limited to these. For example, the disturbance of the painted skin can be included in the defective portion. Moreover, there may be an aspect in which the second LED light source unit 4 is not provided.

  According to the defective part detection instrument of the present invention, inspection of defective parts such as scratches or distortions on the surface of a detection object such as a car can be suitably performed.

DESCRIPTION OF SYMBOLS 1 ... Defect location detection instrument 2 ... Heat sink 21 ... Flat plate shape part; 22a, 22b ... Radiation part; 23a, 23b ... 1st groove part; 24a, 24b ... 2nd groove part 3 ... 1st LED light source part 31 ... 1st board | substrate; 311 ... 1st LED lighting circuit; 32 ... 1st LED; 33 ... 1st cover; 331a, 331b ... 1st edge part; 332 ... Light transmission part; 333 ... Light non-transmission part 4 ... 2nd LED light source part 41 2nd board; 411 ... 2nd LED lighting circuit; 42 ... 2nd LED; 43 ... 2nd cover; 431a, 431b ... 2nd side edge part 5 ... grip part 51 ... power supply part; 52 ... control printed circuit board; ... housing ... 54 ... lid ... 55 ... switch 6 ... end cap CA ... detected body; DF ... defective part 100 ... inspection method; 101 ... direct pressed product; 102 ... internal defect; 103 ... light source

Claims (7)

Using a light source that irradiates light to the detected object while moving relative to the detected object in a state of being opposed to the detected object, the light source is irradiated from the light source. In the defective part detection instrument for detecting a defective part such as a scratch or distortion on the detected object by checking the reflected light of the light,
A heat sink that has a flat plate-shaped portion that is long in one direction and has a rectangular cross section perpendicular to the long direction, and dissipates heat generated in the substrate;
A first substrate having a lighting circuit disposed along the longitudinal direction on a first surface which is an upper surface of a flat plate-shaped portion of the heat sink, and a first LED provided on the front surface of the first substrate And the 1st LED light source part which has the 1st cover which consists of a translucent material which stores the 1st substrate and the 1st LED, and
A second substrate having a lighting circuit, which is disposed along the longitudinal direction on a second surface facing the first surface of the flat plate-shaped portion of the heat sink, is provided on the front surface of the second substrate. A second LED light source unit having a second LED and a long semi-tubular second cover made of a translucent material that houses the second substrate and the second LED;
A sighting unit that irradiates light from the first LED light source unit linearly along the longitudinal direction of the heat sink;
A power supply unit that supplies power to the first LED light source unit and the second LED light source unit;
A grip portion which extends in the longitudinal direction of the heat sink and accommodates the power supply portion;
A defective point detection instrument comprising: It is a defective part detection instrument according to claim 1, and
The first part cover is a defective part detection tool detachably attached to the heat sink. It is a defect location detection instrument according to claim 2, and
The first cover is a defective part detection device provided so as to be replaceable with a third cover in which at least one of irradiation number, irradiation interval, irradiation light width, and irradiation color is different. It is a defective part detection instrument according to claim 3,
The sighting unit irradiates the light from the first LED light source unit in at least two parallel straight lines along the longitudinal direction of the heat sink,
The first cover having a light non-transmissive portion that shields light and a light transmissive portion that transmits light so that light from the first LED light source portion is linearly emitted along the longitudinal direction of the heat sink And a defective part detection instrument comprising an irradiation number setting unit configured to set the number of light emitted from the aiming unit. The defective point detection instrument according to claim 4,
The defective spot detection instrument, wherein the light set by the irradiation number setting unit is two linear lights arranged in parallel. It is a defective point detection instrument according to any one of claims 3 to 5, further,
An irradiation color changing unit comprising the first cover and the third cover, and changing the color of the light of the first LED to a color according to the color of the first cover and the third cover through which the light passes Defective point detection equipment provided. The defect location detection instrument according to any one of claims 1 to 6 , further comprising:
ON / OFF of the power supplied from the power supply unit so that any of the first LED and the second LED is turned off, only the first LED is turned on, and the second LED is turned on. Defective point detection instrument with a switch to switch between.

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