Color measurement device

Abstract

To provide a color measuring device that can easily perform maintenance of a reflection reference surface and in turn can acquire an appropriate reflection reference value.SOLUTION: A color measuring device comprises: an opening 21a that is formed in an opening forming member 21 arranged at the bottom of the color measuring device to take in light arriving from a measuring object to the inside of the device; a light emitting section that emits light for measurement toward the measuring object; an incident light processing section that processes light incident through the opening; and a shutter unit 110 that can be switched between a closing state for closing the opening and an opening state for opening the opening and being a state for performing color measurement, the shutter unit having a reflection reference surface 125 to be a reference of reflectance at a position facing the opening in the closing state. The shutter unit is provided to be switchable to an exposing state for exposing the reflection reference surface to the outside of the device in addition to the closing state and the opening state.SELECTED DRAWING: Figure 14

Description

[Technical Field]

[0001] The present invention relates to a colorimetric device that measures color based on light arriving from a measurement object. [Background technology]

[0002] Conventionally, colorimetric devices that measure color based on light reaching a measurement target have been known. For example, one type of colorimetric device measures color by directing light reaching a measurement target through a spectral filter, extracting specific wavelength components using the spectral filter, receiving the light with a photodiode, and detecting the voltage output from the photodiode. In such colorimetric devices, an opening is provided on the bottom of the device body. Since leaving this opening open allows dust and other particles to enter the device, a member that can be switched between covering and exposing the opening is sometimes provided, as shown in Patent Document 1.

[0003] In Patent Document 1, the member covering the opening is called a support plate. The support plate is provided so that it can move between a position that covers the measurement window, which is the opening, and a position that exposes the measurement window. A white reference tile is provided on the support plate as a reflective reference surface, and the white reference value can be obtained when the support plate is in a state where it covers the measurement window. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2010 / 0328656 Summary of the Invention [Problem to be solved by the invention]

[0005] If the reflective reference surface becomes dirty, an appropriate reflective reference value cannot be obtained, but in conventional color measurement devices, the maintainability of the reflective reference surface has not been taken into consideration. [Means for solving the problem]

[0006] In order to solve the above problem, the colorimetric device of the present invention comprises an opening formed in an opening-forming member arranged at the bottom of the device for introducing light arriving from the object to be measured into the device, a light-emitting unit that emits measurement light toward the object to be measured, an incident light processing unit that processes the light that has entered through the opening, and a shutter unit that is switchable between a closed state that covers the opening and an open state that opens the opening when performing colorimetric measurement, and that has a reflective reference surface that serves as a reference for reflectance in a position facing the opening in the closed state, and is characterized in that the shutter unit is switchable between the closed state and the open state, as well as an exposed state in which the reflective reference surface is exposed to the outside of the device. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a block diagram showing the functions of the color measurement device. [Figure 2] FIG. 1 is a cross-sectional view of an optical filter device. [Figure 3] FIG. 2 is a perspective view showing the top surface of the color measurement device. [Figure 4] FIG. 4 is a perspective view showing the bottom surface of the color measurement device when the shutter unit is in a closed state. [Figure 5] FIG. [Figure 6] FIG. 4 is a plan view of the bottom surface of the color measurement device when the shutter unit is in a closed state. [Figure 7] FIG. 4 is a plan view of the bottom surface of the color measurement device with the shutter unit in an open state. [Figure 8] Cross section AA of Figure 6. [Figure 9] Cross section B-B of Figure 7. [Figure 10] FIG. [Figure 11] FIG. 4 is a perspective view of the bottom surface of the color measurement device with the shutter unit in an open state. [Figure 12] FIG. 12 is a diagram showing the state in which the second bottom frame has been removed from the state shown in FIG. 11. [Figure 13]This is a diagram of the state in which the shutter unit has been slid in the +Y direction from the state in Figure 12. [Figure 14] FIG. 14 is a diagram showing the state in which the shutter member has been rotated from the state shown in FIG. 13. [Figure 15] Cross section CC of Figure 6. [Figure 16] FIG. 16 is a diagram showing the state in which the second bottom frame has been removed from the state shown in FIG. 15. [Figure 17] FIG. [Figure 18] 10A and 10B are diagrams illustrating switching of a shutter unit to an exposure state according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present invention will be briefly described below. The color measuring device of the first aspect comprises an opening formed in an opening forming member arranged at the bottom of the device for introducing light arriving from the object to be measured into the device, a light emitting unit that emits measurement light toward the object to be measured, an incident light processing unit that processes the light that has entered through the opening, and a shutter unit that is switchable between a closed state that covers the opening and an open state that opens the opening when performing color measurement, and that has a reflective reference surface that serves as a reference for reflectance in a position facing the opening in the closed state, and is characterized in that the shutter unit is switchable between the closed state and the open state, as well as an exposed state in which the reflective reference surface is exposed to the outside of the device.

[0009] According to this aspect, the shutter unit is configured to be switchable between the closed state and the open state, as well as an exposed state in which the reflection reference surface is exposed to the outside of the device, so that the reflection reference surface can be easily maintained, and therefore an appropriate reflection reference value can be obtained.

[0010] The second aspect is characterized in that, in the first aspect, the shutter unit comprises a slide member that can slide along the bottom surface of the device, and a shutter member that can slide along the bottom surface together with the slide member, has the reflective reference surface, and is rotatable relative to the slide member, and the shutter member switches to the exposed state by rotating relative to the slide member.

[0011] According to this aspect, the shutter unit switches to the exposed state by rotating the shutter member relative to the slide member, so that switching to the exposed state can be performed with a simple configuration.

[0012] A third aspect is the second aspect, characterized in that the shutter member abuts against the bottom surface in the exposed state. According to this aspect, since the shutter member abuts against the bottom surface in the exposed state, the bottom surface can support the shutter member when cleaning the reflective reference surface, thereby preventing damage to the shutter unit due to strong force being applied to the reflective reference surface.

[0013] The fourth aspect is characterized in that, in the second or third aspect, the shutter unit switches to the open state by sliding from the closed state in a first direction, and switches to the closed state by sliding from the open state in a second direction opposite to the first direction, and the shutter member comprises a boss protruding in a direction intersecting the sliding direction, a bottom first frame that forms the bottom surface, and a bottom second frame that is a member that forms the bottom surface together with the bottom first frame and is positioned in the second direction relative to the bottom first frame, and the bottom second frame is detachable and restricts rotation of the boss when attached and allows rotation of the boss when removed.

[0014] According to this aspect, the boss, i.e., the shutter member, is configured to be rotatable by removing the second bottom frame. In other words, when the second bottom frame is attached, the rotation of the shutter member is restricted, i.e., the switching of the shutter unit to the exposed state is restricted. This prevents the shutter unit from accidentally switching to the exposed state, and prevents dust and other particles from adhering to the reflective reference surface.

[0015] The fifth aspect is characterized in that, in the fourth aspect, it is provided with a first screw for fixing the bottom second frame and a second screw for fixing the opening forming member, and the second screw is covered by the bottom second frame when the bottom second frame is attached and is exposed when the bottom second frame is removed.

[0016] According to this aspect, the device is provided with a first screw for fixing the bottom second frame and a second screw for fixing the opening forming member, and the second screw is covered by the bottom second frame when the bottom second frame is attached and is exposed when the bottom second frame is removed, thereby preventing the second screw from being accidentally removed when the bottom second frame is removed.

[0017] The sixth aspect is characterized in that, in the fourth or fifth aspect, when the bottom second frame is attached, the bottom first frame and the bottom second frame form the periphery of the bottom surface, and the bottom first frame and the bottom second frame overlap each other alternately at the connection portion.

[0018] According to this aspect, the bottom first frame and the bottom second frame overlap alternately at the connection portion, thereby preventing external light from entering the device through the connection portion and obtaining appropriate color measurement results.

[0019] The seventh aspect is characterized in that, in any of the second to sixth aspects, the shutter unit comprises a shutter holding member that holds the shutter member so that the shutter member can be displaced in directions approaching and moving away from the opening, and a pressing member that presses the shutter member toward the opening.

[0020] According to this aspect, since the shutter member is configured to be pressed toward the opening by the pressing member, even if there are manufacturing errors or assembly errors of parts, or wear due to use, the shutter member is pressed toward the opening, thereby preventing a gap from being formed between the shutter member and the opening, and as a result, it is possible to effectively prevent dust and other particles from entering the opening.

[0021] The eighth aspect is characterized in that, in any of the first to seventh aspects, the incident light processing unit includes a wavelength-variable optical filter that transmits a predetermined wavelength component of the incident light, and a light receiving unit that receives the light that has passed through the optical filter. According to this aspect, in a configuration in which the incident light processing section includes a wavelength-variable optical filter that transmits a predetermined wavelength component of the incident light, and a light receiving section that receives the light that has passed through the optical filter, the functional effects of any of the above-mentioned first to seventh aspects can be obtained.

[0022] A ninth aspect of the present invention is characterized in that, in the eighth aspect, the optical filter is a Fabry-Perot etalon. According to this aspect, in a configuration in which the optical filter is a Fabry-Perot etalon, the effects of the eighth aspect described above can be obtained.

[0023] The present invention will be specifically described below. The XYZ coordinate system shown in each drawing is a Cartesian coordinate system, with the XY plane being the horizontal plane and the YZ plane being the vertical plane. The Z-axis direction is the vertical direction and is the device height direction that intersects with the top surface 50e and the bottom surface 50f of the colorimetric device 1. The Y-axis direction is a direction perpendicular to the vertical direction and is the longitudinal direction of the device when viewing the colorimetric device 1 from the vertical direction. The Y-axis direction is the sliding direction of the shutter unit 110, which will be described later, and the -Y direction of the Y-axis direction is an example of a first direction in which the shutter unit 110 slides from the closed state toward the open state. The +Y direction is an example of a second direction in which the shutter unit 110 slides from the open state toward the closed state. The X-axis direction is a direction perpendicular to the Y-axis direction and corresponds to the width direction of the color measurement device 1 when viewed vertically. In this specification, the configuration of the color measurement device 1 will be described assuming that the bottom surface 50f is placed on a placement surface parallel to a horizontal plane, and the longitudinal direction of the color measurement device 1 is along the Y-axis direction.

[0024] [Overall configuration of colorimeter 1] First, the overall configuration of a color measurement device 1 according to this embodiment will be described with reference to FIGS. The colorimetric device 1 has a configuration for measuring color based on light arriving from a measurement object 200. The light arriving from the measurement object 200 includes light reflected by the measurement object 200 and light emitted by the measurement object 200 itself. The colorimetric device 1 includes a bandpass filter 7, an optical filter device 3, a light receiving unit 4, a capacitance detection unit 6, a light emitting unit 9, an MCU (Micro Controller Unit) 10, a wired IF (Interface) 12, a wireless communication unit 13, an operation unit 14, a display unit 15, a battery control unit 16, and a battery 17. The bandpass filter 7, the optical filter device 3, and the light receiving unit 4 constitute an incident light processing unit 2 that processes the light that arrives from the measurement object 200 and enters it.

[0025] The bandpass filter 7 transmits light in the visible light range, for example, 380 nm to 720 nm, out of the light arriving from and entering the measurement object 200, and cuts out light in the ultraviolet and infrared ranges. This allows light in the visible light range to enter the optical filter device 3. The light arriving at the bandpass filter 7 from the measurement object 200 reaches the bandpass filter 7 via an opening 21a and a measurement window 87a (see FIGS. 7 and 11), which will be described later.

[0026] The optical filter device 3 selectively transmits a desired wavelength component from the visible light that has passed through the bandpass filter 7. The light that has passed through the optical filter device 3 is incident on a photodiode 4a, which is an example of a light receiving element, and is processed by a light receiving unit 4 that includes the photodiode 4a. The light receiving unit 4 converts the intensity of the received light into a voltage value, and further converts the voltage value into a digital signal and outputs it to the MCU 10. The colorimetric device 1 can measure the spectrum of the measurement object 200 by repeatedly selecting a wavelength using the optical filter device 3 and obtaining the received light intensity using the light receiving unit 4.

[0027] The configuration of the optical filter device 3 will now be described with reference to Fig. 2. In this embodiment, the optical filter device 3 is a wavelength-tunable Fabry-Perot etalon that transmits a predetermined wavelength component of the light that arrives from and enters the measurement target 200, and is a wavelength filter that utilizes multiple interference between two opposing reflecting surfaces. In FIG. 2, the optical filter device 3 includes a tunable interference filter 45 , which is housed inside an exterior that is made up of a first glass member 30 , a second glass member 31 , and a case 32 .

[0028] The case 32 and the first glass member 30, and the case 32 and the second glass member 31 are respectively joined by a joining member 33 such as low-melting-point glass or epoxy resin. The tunable interference filter 45 and the case 32 are fixed by a fixing material 34 such as an adhesive. An electrode 36 on the outer surface of the case 32 and the tunable interference filter 45 are electrically connected by wire bonding 35 and wiring inside the case 32.

[0029] The tunable interference filter 45 includes a base substrate 37 and a diaphragm substrate 38. The base substrate 37 and the diaphragm substrate 38 are bonded together by a bonding film 43. Mirrors 39 are formed on the base substrate 37 and the diaphragm substrate 38, respectively. The outermost surfaces of the opposing mirrors 39 are made of a conductor. The capacitance between the opposing mirrors 39 is detected by a capacitance detection unit 6 (see FIG. 1). The capacitance detection unit 6 is composed of a CV (Capacitance to Voltage) converter, and converts the detected capacitance into a voltage value, which is then converted into a digital value and sent to the MCU 10. The distance between the opposing mirrors 39 is controlled by an electrostatic actuator configured by a fixed electrode 40 and a movable electrode 41 that are formed concentrically when viewed from the Z-axis direction and face each other.

[0030] When a voltage is applied between the facing fixed electrode 40 and movable electrode 41, an electrostatic force is generated that attracts the fixed electrode 40 and the movable electrode 41 to each other. At this time, the concentrically formed diaphragm portion 42 is deformed, and the mirror 39 of the diaphragm substrate 38 is attracted toward the base substrate 37, thereby controlling the distance between the facing mirrors 39. The wavelength of light that passes through the tunable interference filter 45 is selected in accordance with the distance between the facing mirrors 39.

[0031] During spectroscopic measurement, light from the measurement target 200 enters the optical filter device 3 along the optical axis CL from the second glass member 31 side to the first glass member 30 side. The optical axis CL is parallel to the Z-axis direction and is a line passing through the centers of the opening 21a (see FIGS. 7 and 11), the measurement window 87a (see FIGS. 7 and 11), the tunable interference filter 45, and the photodiode 4a (see FIG. 1). In particular, the opening 21a, the measurement window 87a, and the tunable interference filter 45 form perfect circles when viewed from the Z-axis direction, and the optical axis CL passes through their centers. The optical axis CL may hereinafter be referred to as the center position CL.

[0032] The light incident on the optical filter device 3 interferes between the opposing mirrors 39, and light of a wavelength selected according to the distance between the opposing mirrors 39 is transmitted through the tunable interference filter 45. The light that has transmitted through the tunable interference filter 45 then passes through the first glass member 30 and travels toward the light receiving unit 4. The above is the configuration of the optical filter device 3.

[0033] Returning to Figure 1, the MCU 10, which is an example of a control unit that performs various controls on the colorimetric device 1, is a microprocessor-based control device that has built-in memory that stores various programs and data necessary for controlling the colorimetric device 1. 2, the MCU 10 sends control information required to drive the electrostatic actuator configured by the fixed electrode 40 and the movable electrode 41 facing each other to an amplifier (not shown), and the amplifier supplies a predetermined drive voltage to the optical filter device 3. The MCU 10 then compares information related to the voltage value output from the capacitance detection unit 6 with a stored value and performs feedback control of the optical filter device 3 based on the information.

[0034] The light emitting unit 9 emits light for measurement toward the measurement object 200. The light emitting unit 9 is composed of a plurality of light emitting elements, specifically a plurality of LEDs, which emit light with different wavelength distributions. The MCU 10 controls the turning on and off of the light emitting unit 9.

[0035] The wired IF 12 and the wireless communication unit 13 are components for communicating with an external device. For example, USB (Universal Serial Bus) can be used as a standard for communication via the wired IF 12. Bluetooth can be used as a standard for the wireless communication unit 13. USB and Bluetooth are registered trademarks. The MCU 10 sends various data to an external device via the wired IF 12 or the wireless communication unit 13, and receives various data from an external device. The colorimetric device 1 can charge the battery 17 by receiving power from an external device via the wired IF 12.

[0036] The operation unit 14 is made up of a power button and various operation setting buttons, and sends signals according to operations to the MCU 10. The operation unit 14 will be described in more detail later. The display unit 15 is formed by, for example, a liquid crystal panel, and displays various information such as a user interface for setting colorimetry conditions based on signals sent from the MCU 10 and colorimetry results.

[0037] The shutter sensor 128 that sends a detection signal to the MCU 10 is an example of a position detection means for detecting the position of the shutter unit 110, which will be described later, and in this embodiment is configured by a magnetic sensor that changes the detection signal depending on the strength of the magnetism. The shutter sensor 128 is provided on the underside of a circuit board (not shown), and sends a signal to the MCU 10 in accordance with changes in magnetic force based on the distance from the magnet 127 (see FIG. 10) provided in the shutter unit 110. Based on the signal received from the shutter sensor 128, the MCU 10 can detect whether the shutter unit 110 is in a closed state or an open state.

[0038] The battery 17 is a lithium ion secondary battery in this embodiment, and supplies power to each component that requires power in the colorimetric device 1. The components that receive power from the battery 17 include an incident light processing unit 2, which will be described later. The battery control unit 16 performs various controls such as charging control of the battery 17.

[0039] [Appearance of colorimeter 1] Next, the external configuration of the color measuring device 1 will be described with reference to FIGS. The device body 50 of the colorimetric device 1 is configured so that the outer shell as a whole forms a box shape, with a main housing 51, an upper frame 52, a first bottom frame 53, and a second bottom frame 49. In this embodiment, the main housing 51, the upper frame 52, the first bottom frame 53, and the second bottom frame 49 are formed of a resin material. In each figure, reference numeral 50a denotes the side surface of the device body 50 in the +Y direction, which will be referred to below as the front surface 50a. Reference numeral 50b (see FIG. 6) denotes the side surface of the device body 50 in the +X direction, which will be referred to below as the right side surface 50b. Reference numeral 50c denotes the side surface of the device body 50 in the -X direction, which will be referred to below as the left side surface 50c. Reference numeral 50d denotes the side surface of the device body 50 in the -Y direction, which will be referred to below as the rear surface 50d. In this specification, the terms "upper," "lower," "left," and "right" are used based on the direction as seen by the user when the user holds the colorimetric device 1 with the top surface 50e facing up and the rear surface 50d facing forward.

[0040] 3 to 6, the front surface 50a is formed by the front wall portion 51a of the main housing 51, the right side surface 50b is formed by the right wall portion 51b of the main housing 51, the left side surface 50c is formed by the left wall portion 51c of the main housing 51, and the rear surface 50d is formed by the rear wall portion 51d of the main housing 51. Reference numeral 50e denotes the surface of the device body 50 in the +Z direction, which will be referred to below as the top surface 50e. Reference numeral 50f denotes the surface of the device body 50 in the -Z direction, which will be referred to below as the bottom surface 50f.

[0041] On the top surface 50e of the device body 50, the operation unit 14 and the display unit 15 are arranged along the Y-axis direction. The operation unit 14 is configured to include a power button 55, a decision button 54, a back button 56, and a cross button 60. The cross button 60 is configured to include an up button 61, a down button 62, a left button 63, and a right button 64. In the colorimetric device 1 according to this embodiment, all operation buttons are arranged on the top surface 50e and are collected together in the operation unit 14.

[0042] The power button 55 is a button for turning on and off the power of the colorimetric device 1. The decision button 54 is a button for deciding the various settings displayed on the display unit 15, that is, a button for deciding the colorimetric conditions, and also a button for performing colorimetry and obtaining a reflection reference value, which will be described later. The decision button 54 has a perfect circular shape when viewed from the Z-axis direction. The surrounding area of ​​the decision button 54 is configured as a ring-shaped light emitting section 59, the color and state of which light is changed depending on the state of the device.

[0043] The back button 56 is a button for returning to the previous state in the user interface displayed on the display unit 15, and is also a button for canceling the execution of an operation. The cross button 60 is a button for selecting various items in the user interface displayed on the display unit 15.

[0044] Various information such as color measurement results is displayed on the display unit 15. In this embodiment, the display unit 15 is configured by a liquid crystal display (LCD) 67. Hereinafter, the liquid crystal display 67 will be abbreviated as LCD 67. A display unit cover 57, which is a transparent member, is provided above the LCD 67, and this display unit cover 57 forms part of the upper surface 50e. In this embodiment, the upper surface 50e is configured so that there is almost no difference in level between the upper surface of the display unit cover 57 and the upper surface of the operation unit 14. As a result, the upper surface 50e is configured as a flat surface with almost no difference in level overall. However, the upper surface of the enter button 54 is slightly recessed, and is shaped to fit comfortably with the pad of the user's finger when pressing the enter button 54.

[0045] 5, the color measurement device 1 has a portion where the opening 21a and the operation unit 14 overlap when viewed from the Z-axis direction. This allows the user to align the opening 21a with the measurement portion of the measurement object 200 (see FIG. 1) based on the position of the operation unit 14, that is, the opening 21a can be aligned with the measurement portion with a simple configuration. In particular, the color measurement device 1 is configured as a handheld type, and when the user operates the operation unit 14 with his / her fingertip, the position of the fingertip and the position of the opening 21a become close to each other, making it easy to intuitively determine the position of the opening 21a. In particular, in this embodiment, the center position of the opening 21a and the center position of the enter button 54 coincide when viewed from the Z-axis direction. This allows the opening 21a to be more accurately positioned at the measurement site.

[0046] The operation unit 14 is also configured with a power button 55 and all buttons related to measurement on the top surface 50e, which makes it easy to see the power button 55 and all buttons related to measurement, facilitating operation of the device. Furthermore, the top surface 50e including the operation unit 14 is formed flat, so that the device can be placed stably even when placed with the top surface 50e facing downwards.

[0047] Next, a shutter unit 110 is provided on the bottom surface 50f as shown in Figures 4, 6, and 7. Figures 4 and 6 show the shutter unit 110 in a closed state, and Figures 7 and 11 show the shutter unit 110 in an open state. The shutter unit 110 can be switched between a closed state and an open state by sliding along the Y-axis direction, i.e., along the bottom surface 50f. More specifically, the shutter unit 110 switches from the closed state shown in Figures 4 and 6 to the open state by sliding in the -Y direction. Also, the shutter unit 110 switches from the open state shown in Figures 7 and 11 to the closed state by sliding in the +Y direction. As will be described in detail later, the shutter unit 110 is provided so as to be able to maintain a closed state and an open state.

[0048] Opening the shutter unit 110 exposes the opening 21a and the measurement window 87a as shown in Figures 7 and 11. The opening 21a and the measurement window 87a are open on the bottom surface 50f of the device. Note that the opening here means that light can enter, and may be provided with a transparent glass plate, for example. The opening 21a is formed in an opening forming member 21 disposed at the bottom of the device, and the measurement window 87a is formed in a light collecting member 87 located in the +Z direction relative to the opening forming member 21. Measurement light emitted from the light emitting unit 9 is emitted from the opening 21a toward the measurement object 200. Light arriving from the measurement object 200 is taken into the device through the opening 21a and then enters the incident light processing unit 2 through the measurement window 87a.

[0049] 5 and 7, the center position CL coincides with the center positions of the opening 21a and the measurement window 87a. The line VCL is parallel to the Y-axis direction and passes through the center position CL when viewed from the Z-axis direction. The line HCL is parallel to the X-axis direction and the Y-axis direction and passes through the center position CL when viewed from the Z-axis direction. In this embodiment, the center position CL coincides with the center position of the enter button 54 on the XY plane, and also coincides with the center position of the cross button 60. The power button 55 and the back button 56 are arranged symmetrically with respect to the line VCL as shown in FIG.

[0050] As shown in Fig. 3, a grip portion 50g is formed on the left side surface 50c of the device body 50. The grip portion 50g is configured as a recessed portion 51g formed in the left wall portion 51c of the main housing 51. The recessed portion 51g is formed by a curved surface that approaches the center of the device body 50 in the X-axis direction as it extends in the -Z direction. Although not shown in the figure, a similar grip portion 50g is also formed on the right side surface 50b of the device body 50. The provision of such a grip portion 50g allows the user to easily and securely hold the device body 50.

[0051] [Shutter unit configuration] Next, we will explain the shutter unit 110 provided at the bottom of the device body 50. As shown in Fig. 10, the shutter unit 110 is a unit body comprising a shutter holding member 111, a shutter member 112, and a link member 113, which is an example of a slide member. In this embodiment, the shutter holding member 111, the shutter member 112, and the link member 113 are made of a resin material.

[0052] The shutter holding member 111 and the link member 113 are connected to each other via two connecting shafts 114 so as to be rotatable relative to each other. The two connecting shafts 114 are shafts formed integrally with the link member 113 using a resin material. The connecting shafts 114 are supported by shaft holders 111d formed on the shutter holding member 111.

[0053] A first guide shaft 121 is formed integrally with the shutter holding member 111 on the side surfaces facing the +X direction and the −X direction of the shutter holding member 111. Further, a second guide shaft 122 and a third guide shaft 123 are formed integrally with the link member 113 on the side surfaces facing the +X direction and the −X direction of the link member 113.

[0054] 15, first lower guide portion 21c, second lower guide portion 21d, and third lower guide portion 21e are formed along the Y-axis direction at the +X-direction end and the -X-direction end of opening forming member 21. Of these, first lower guide portion 21c and second lower guide portion 21d have shapes such that the -Y-direction ends curve in the +Z direction as they approach the -Y direction.

[0055] First upper guide portions 53c are formed at the +X direction end and the -X direction end of the first bottom frame 53 so as to sandwich the first guide shaft 121 between themselves and the above-mentioned first lower guide portion 21c. Furthermore, upper guide portions 49d are formed at the +X direction end and the -X direction end of the second bottom frame 49 so as to sandwich the first guide shaft 121 between themselves and the first lower guide portion 21c. Similarly, second upper guide portions 53d are formed at the +X direction end and the -X direction end of the bottom first frame 53 so as to sandwich the second guide shaft 122 between them and the above-mentioned second lower guide portion 21d. Similarly, a third upper guide portion 53e is formed at the +X-direction end and the -X-direction end of the bottom first frame 53 so as to sandwich the third guide shaft 123 between itself and the above-mentioned third lower guide portion 21e.

[0056] In this way, the first guide shaft 121, the second guide shaft 122, and the third guide shaft 123 are sandwiched in the Z-axis direction between the opening forming member 21 and the first bottom frame 53 and the second bottom frame 49, and are guided in the Y-axis direction by the opening forming member 21 and the first bottom frame 53 and the second bottom frame 49. Since the first guide shaft 121 is provided on the shutter holding member 111, the movement trajectory of the shutter holding member 111 is determined by the first lower guide portion 21c and the first upper guide portion 53c, the first lower guide portion 21c and the upper guide portion 49d, and the connecting shaft 114. Furthermore, since the second guide shaft 122 and the third guide shaft 123 are provided on the link member 113, the movement trajectory of the link member 113 is determined by the second lower guide portion 21d and the second upper guide portion 53d, and the third lower guide portion 21e and the third upper guide portion 53e.

[0057] The movement limit of the shutter unit 110 in the +Y direction, i.e., the closed state, is determined by the first guide shaft 121 abutting against a movement restriction portion 49b formed on the bottom second frame 49. The movement limit of the shutter unit 110 in the -Y direction, i.e., the open state, is determined by the first guide shaft 121 abutting against a movement restriction portion 21f formed on the opening forming member 21. In this embodiment, the second guide shaft 122 and the third guide shaft 123 do not determine the movement limit of the shutter unit 110 in the Y direction.

[0058] 8 and 9, a spring hanging shaft 115 is provided on the device body 50, and one end of a torsion spring 117, which is an example of a spring member, is rotatably fixed to this spring hanging shaft 115. The tip of one end of the torsion spring 117 is formed in a coil shape so that the spring hanging shaft 115 can be passed through it. The spring hanging shaft 115 is formed integrally with the opening-forming member 21 from a resin material. 10, the other end of the torsion spring 117 is hooked on a shaft 145a formed on a spring support member 145 that constitutes the shutter unit 110. The spring support member 145 is a member that is attached to the link member 113. As a result, torsion spring 117 can rotate in the YZ plane, in other words, its posture can be changed.

[0059] When the shutter unit 110 is in the closed state shown in FIG. 8, the torsion spring 117 exerts a pressing force in the +Y direction on the shutter unit 110, thereby maintaining the shutter unit 110 in the closed state.

[0060] 9, the posture of torsion spring 117 changes, and this posture change switches the direction of the force that torsion spring 117 exerts on shutter unit 110 from the +Y direction to the -Y direction, thereby maintaining shutter unit 110 in the open state.

[0061] 4, an opening direction mark 111g and a closing direction mark 111h are provided on the top surface of the shutter holding member 111. These marks indicate the operating direction of the shutter unit 110 to the user. Furthermore, a finger hook edge 111e is formed on the end in the +Y direction on the top surface of the shutter holding member 111. As shown in Fig. 8, the finger hook edge 111e protrudes in the -Z direction beyond the second bottom frame 49 when the shutter unit 110 is in the closed state, and has a shape that is slightly inclined in the -Z direction as it approaches the +Y direction. This makes it easier for the user to hook their finger on the finger hook edge 111e when operating the shutter unit 110 from the closed state to the open state, improving operability.

[0062] Furthermore, a finger hook recess 111f is formed on the end in the -Y direction on the top surface of the shutter holding member 111. Here, when the shutter unit 110 is in the open state as shown in Figure 9, the shutter holding member 111 does not protrude in the -Z direction from the bottom surface 50f. However, by forming the finger hook recess 111f on the shutter holding member 111, the user can hook their finger on the finger hook recess 111f when operating the shutter unit 110 from the open state to the closed state, improving operability.

[0063] Next, as shown in Fig. 10, a shutter member 112 is provided on the +Z direction side of the shutter holding member 111. A white plate 125, which serves as a reflection reference surface, is provided on the +Z direction side of the shutter member 112. The white plate 125 is white so that the reflectance is close to 100% in order to obtain a reflection reference value. White plate 125 is located in the central region in the planar direction of shutter member 112, i.e., in the XY plane. Here, white plate 125 located in the central region in the planar direction of shutter member 112 means that the range of white plate 125 includes the central position of shutter member 112 in the planar direction. The central position of shutter member 112 in the planar direction is the central position of shutter member 112 in the Y-axis and X-axis directions, and in this embodiment, roughly coincides with the optical axis CL or is at least in the vicinity of the optical axis CL.

[0064] The shutter member 112 is provided so as to be displaceable in the Z-axis direction relative to the shutter holding member 111, i.e., in the direction toward and away from the opening 21a. Between the shutter member 112 and the shutter holding member 111, there is provided a leaf spring 118 as a pressing member that presses the shutter member 112 in the +Z direction, i.e., toward the opening 21a. In this embodiment, the leaf springs 118 are arranged at approximately equal intervals along the periphery of the white plate 125.

[0065] When the shutter unit 110 is in the closed state, the pressing force of the leaf spring 118 causes the contact surface 112a of the shutter member 112 to come into close contact with the shutter opposing surface 21g (see FIG. 11). Here, the shutter-opposing surface 21g is the surface in the −Z direction of the portion where the opening 21a is formed in the opening forming member 21. The shutter-opposing surface 21g is a flat surface that has an annular shape in a plan view. The contact surface 112a is a surface that forms a circular ring shape so as to fit along the shutter opposing surface 21g.

[0066] When the shutter member 112 is pressed toward the opening 21a, the contact surface 112a presses against the shutter opposing surface 21g, thereby closing the opening 21a and preventing a gap from forming between the contact surface 112a and the shutter opposing surface 21g, thereby preventing dust and other particles from entering the device through the opening 21a. In addition, since the shutter member 112 is pressed toward the opening 21a by the leaf spring 118, the position and orientation of the white plate 125 are less likely to vary, and an appropriate reference value can be obtained.

[0067] Next, the second bottom frame 49 is detachably attached to the device main body 50. More specifically, the second bottom frame 49 is provided with a first screw 130 as shown in Figures 17(a) and 17(b). The first screw 130 is held in place by a washer 131 so as not to come off the second bottom frame 49 as shown in Figure 17(b). Overlapping portions 49a forming surfaces parallel to the YZ plane are formed at both ends in the X-axis direction of the bottom second frame 49. Ribs 49c extending along the Z-axis direction are formed inside the overlapping portions 49a.

[0068] 12, an overlapping portion 53g is formed on the first bottom frame 53, and a guide groove 53h extending in the Z-axis direction is formed in the overlapping portion 53g. As a result, when the second bottom frame 49 is attached, the rib 49c of the second bottom frame 49 fits into the guide groove 53h of the first bottom frame 53 and is guided in the Z-axis direction. When the second bottom frame 49 is attached, the rib 49c fits into the guide groove 53h, thereby maintaining the relative positions of the first bottom frame 53 and the second bottom frame 49 in the Y-axis direction.

[0069] With the second bottom frame 49 attached, the first bottom frame 53 and the second bottom frame 49 form the periphery of the bottom surface 50f. With the second bottom frame 49 attached, the overlapping portion 49a of the second bottom frame 49 and the overlapping portion 53g of the first bottom frame 53 overlap as shown in Fig. 11, i.e., the first bottom frame 53 and the second bottom frame 49 overlap alternately at the connection portion. With this configuration, it is possible to suppress the intrusion of external light through the connection portion between the first bottom frame 53 and the second bottom frame 49, and to obtain appropriate color measurement results.

[0070] Next, a screw hole 21h is formed in the opening forming member 21 as shown in Fig. 12, and a nut 133 is provided inside the screw hole 21h as shown in Fig. 8 and Fig. 9. As a result, the first screw 130 provided in the second bottom frame 49 fits into the nut 133 through the screw hole 21h, and the second bottom frame 49 is fixed to the device main body 50.

[0071] 17, the second bottom frame 49 has the above-mentioned upper guide portions 49d formed at both ends in the X-axis direction, and screw covers 49e formed on the inside of the upper guide portions 49d. The screw covers 49e cover the second screws 132 located on both sides in the X-axis direction of the first screws 130, as shown in FIG. 7. The second screws 132 are screws that fix the opening-forming member 21 to the device body 50.

[0072] In this way, the second screws 132 are covered by the screw covers 49e when the second bottom frame 49 is attached, and are exposed when the second bottom frame 49 is removed. With this configuration, it is possible to prevent the second screws 132 from being accidentally removed when the second bottom frame 49 is removed.

[0073] Here, as shown in Figures 4 and 6, when the shutter unit 110 is in the closed state, the first screw 130 is covered by the shutter unit 110. Because the first screw 130 is covered by the shutter unit 110 when the shutter unit 110 is in the closed state, the aesthetic appearance of the device can be maintained when not in use. To remove the first screw 130, the shutter unit 110 is opened as shown in Figures 7 and 11, and then the first screw 130 is removed. This makes it possible to remove the second bottom frame 49 as shown by the change from Figure 11 to Figure 12.

[0074] When the shutter unit 110 is slid from the open state to the closed state with the second bottom frame 49 removed, the second guide shaft 122 abuts against the movement restriction portion 53j of the first bottom frame 53, and the third guide shaft 123 abuts against the movement restriction portion 53k of the first bottom frame 53, as shown in Figure 16, thereby restricting movement in the +Y direction. In this state, the first guide shaft 121 is not restricted by the second bottom frame 49, so the shutter holding member 111 and the shutter member 112 can be rotated around the connecting shaft 114 as shown by the arrow f in Figure 16. When the shutter holding member 111 and the shutter member 112 are rotated, the white plate 125 can be exposed to the outside of the device as shown in the change from Figure 13 to Figure 14. In this state, the shutter holding member 111 and the shutter member 112 abut against and are supported by the bottom surface 50f as shown in Figure 14.

[0075] As described above, shutter unit 110 is a unit that can switch between a closed state in which opening 21a is covered and an open state in which opening 21a is open and is the state for performing colorimetry, and has white plate 125 that serves as a reference for reflectance in a position facing opening 21a in the closed state. In addition to the closed and open states, shutter unit 110 is also switchable to an exposed state (see FIG. 14) in which white plate 125 is exposed to the outside of the device. This allows for easy maintenance of white plate 125, and ultimately makes it possible to obtain an appropriate reflectance reference value.

[0076] Furthermore, in this embodiment, shutter unit 110 includes link member 113, which is a sliding member that can slide along bottom surface 50f, and shutter member 112, which is a member that can slide along bottom surface 50f together with link member 113, has white plate 125, and is rotatable relative to link member 113. The shutter member 112 rotates relative to link member 113, thereby switching to the exposed state. With this configuration, switching to the exposed state can be performed with a simple configuration. In this embodiment, the shutter member 112 is a separate member from the shutter holding member 111, and the shutter member 112 rotates relative to the link member 113 via the shutter holding member 111, but for example, the shutter holding member 111 and the shutter member 112 may be configured as a single unit.

[0077] Furthermore, in this embodiment, since the shutter member 112 abuts against the bottom surface 50f in the exposed state, the bottom surface 50f can support the shutter member 112 when the white plate 125 is cleaned, and damage to the shutter unit 110 caused by application of a strong force to the white plate 125 can be suppressed. In particular, application of a strong force to the connecting shaft 114 can be suppressed, and damage to the connecting shaft 114 can be suppressed.

[0078] In this embodiment, the shutter unit 110 switches from a closed state to an open state by sliding in the -Y direction (first direction), and switches from the open state to a closed state by sliding in the +Y direction (second direction). The shutter member 112 includes a first guide shaft 121, which is a boss protruding in the X-axis direction, a first bottom frame 53 that constitutes the bottom surface 50f, and a second bottom frame 49 that constitutes the bottom surface 50f together with the first bottom frame 53 and is positioned in the +Y direction relative to the first bottom frame 53. The second bottom frame 49 is detachable, and restricts rotation of the first guide shaft 121 when attached, and allows rotation of the first guide shaft 121 when removed.

[0079] In this way, the first guide shaft 121, i.e., the shutter member 112, is configured to be rotatable by removing the second bottom frame 49. In other words, when the second bottom frame 49 is attached, the rotation of the shutter member 112 is restricted, that is, the switching of the shutter unit 110 to the exposed state is restricted. This prevents the shutter unit 110 from accidentally switching to the exposed state, and prevents dust and other particles from adhering to the white plate 125.

[0080] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included in the scope of the present invention. For example, in the above-described embodiment, shutter unit 110 is configured to expose white plate 125 to the outside of the device by rotating shutter member 112, but as with shutter unit 110A shown in Fig. 18, white plate 125 may be exposed to the outside of the device by sliding shutter unit 110A. As shown by the change from (a) to (b) in Fig. 18, shutter unit 110A can protrude in the +Y direction by removing bottom second frame 49, thereby exposing white plate 125 to the outside of the device.

[0081] Alternatively, the white plate 125 may be exposed to the outside of the device by sliding the shutter unit 110 in the X-axis direction. Alternatively, the white plate 125 may be exposed to the outside of the device by rotating the shutter unit 110 around a rotation axis along the Z-axis direction or a rotation axis along the Y-axis direction. In these cases, the open state of the shutter unit 110 and the exposed state in which the white plate 125 is exposed to the outside of the device may be the same state.

[0082] In the above embodiment, the bottom second frame 49 is configured to be fixed by the first screws 130, but it is not limited to screws and may be fixed by a snap-fit ​​structure. In addition, in the above embodiment, the first screw 130 is covered when the shutter unit 110 is in the closed state, and is exposed when the shutter unit 110 is switched from the closed state to the open state, but the first screw 130 may be exposed when the shutter unit 110 is in the closed state.

[0083] In the above-described embodiment, the colorimetric device 1 has a built-in battery 17, but the battery 17 may be configured to be removable, that is, the colorimetric device 1 may not have a built-in battery 17. In that case, the battery 17 may be a primary battery that is not repeatedly charged and discharged.

[0084] In this embodiment, the incident light processing unit 2 includes an optical filter device 3 and a light receiving unit 4. The optical filter device 3 is a wavelength-tunable Fabry-Perot etalon that transmits a predetermined wavelength component of the incident light, but the present invention is not limited to this. For example, a spectroscopic method using a diffraction grating may be used. Furthermore, the colorimetric principle may be a device configuration that employs a direct stimulus value reading method that directly measures three stimulus values ​​that are the basis of color. In this embodiment, an LED is used as the light emitting element used in the light emitting unit 9, but this is not limiting, and for example, a xenon lamp may also be used. [Explanation of symbols]

[0085] 1...colorimetry device, 1a...main body assembly, 2...incident light processing section, 3...optical filter device, 4...light receiving section, 4a...photodiode, 5...PD board, 6...capacitance detection section, 7...bandpass filter, 9...light emitting section, 10...MCU, 12...wired IF, 13...wireless communication section, 14...operation section, 15...display section, 16...battery control section, 17...battery, 21...opening forming member, 21a...opening, 21c...first lower guide section, 2 1d...second lower guide portion, 21e...third lower guide portion, 21f...movement restriction portion, 21g...shutter opposing surface, 21h...screw hole, 30...first glass member, 31...second glass member, 32...case, 33...bonding member, 34...fixing material, 35...wire bonding, 36...electrode, 37...base substrate, 38...diaphragm substrate, 39...mirror, 40...fixed electrode, 41...movable electrode, 42...diaphragm portion, 43...bonding film, 45...wavelength variable Interference filter, 49...bottom second frame, 49a...overlapping portion, 49b...movement restriction portion, 49c...rib, 49d...upper guide portion, 49e...screw cover portion, 50...device main body, 50a...front surface, 50b...right side surface, 50c...left side surface, 50d...rear surface, 50e...top surface, 50f...bottom surface, 50g...gripping portion, 51...main housing, 51a...front wall portion, 51b...right wall portion, 51c...left wall portion, 51d...rear wall portion, 51g...recess, 52...upper frame, 53 ...first bottom frame, 53c...first upper guide portion, 53d...second upper guide portion, 53e...third upper guide portion, 53g...overlapping portion, 53h...guide groove, 53j...movement restriction portion, 53k...movement restriction portion, 54...decision button, 55...power button, 56...back button, 57...display cover, 59...light emitting portion, 60...cross button, 61...up button, 62...down button, 63...left button, 64...right button, 87...light collecting member, 87a...measurement window portion, 110...shutter unit, 111...shutter holding member, 111d...shaft holding portion, 111e...finger hook edge portion, 111f...finger hook recess, 111g...opening direction mark, 111h...closing direction mark, 112...shutter member, 112a...contact surface, 113...link member, 114...connecting shaft, 115...spring hook shaft, 117...torsion spring, 118...leaf spring, 121...first guide shaft, 122...second guide shaft, 123...third guide shaft, 125...white plate, 127...magnet, 128...shutter sensor, 130...first screw, 131...washer, 132...second screw, 133...nut, 145...spring support member, 145a...shaft portion, 200...Measurement object

Claims

1. an opening formed in an opening forming member disposed at the bottom of the device for introducing light arriving from the measurement object into the device; a light emitting unit that emits light for measurement toward the measurement object; an incident light processing section that processes light incident through the opening; a shutter unit that is switchable between a closed state that covers the opening and an open state that is a state for performing colorimetry and that opens the opening, and that has a reflection reference surface that serves as a reference for reflectance at a position facing the opening in the closed state; the shutter unit is provided so as to be switchable between the closed state, the open state, and an exposed state in which the reflective reference surface is exposed to the outside of the device; The shutter unit includes a slide member that is slidable along the bottom surface of the device; a shutter member that is slidable along the bottom surface together with the slide member, the shutter member having the reflection reference surface and rotatable relative to the slide member; the shutter member rotates around an axis extending in a direction intersecting the sliding direction of the shutter unit, The shutter member is rotated relative to the slide member to switch to the exposed state, the shutter unit switches to the open state by sliding from the closed state in a first direction, and switches to the closed state by sliding from the open state in a second direction opposite to the first direction, The shutter member has a boss protruding in a direction intersecting with the sliding direction, a bottom first frame that configures the bottom surface; a bottom second frame that constitutes the bottom surface together with the bottom first frame and is positioned in the second direction relative to the bottom first frame, the bottom second frame is detachable, restricting rotation of the boss when attached, and allowing rotation of the boss when detached; A color measuring device characterized by:

2. 2. The color measurement device according to claim 1, wherein the shutter member abuts against the bottom surface in the exposed state. A color measuring device characterized by:

3. 3. The color measurement device according to claim 1, further comprising: a first screw for fixing the bottom second frame; a second screw for fixing the opening forming member, the second screw is covered by the second bottom frame when the second bottom frame is attached, and is exposed when the second bottom frame is removed. A color measuring device characterized by:

4. 4. The color measurement device according to claim 1, wherein when the second bottom frame is attached, the first bottom frame and the second bottom frame form a periphery of the bottom surface, The bottom first frame and the bottom second frame are alternately overlapped at the connection portion. A color measuring device characterized by:

5. 5. The color measurement device according to claim 1, wherein the shutter unit includes: a shutter holding member that holds the shutter member so that the shutter member is displaceable in a direction approaching and moving away from the opening; a pressing member that presses the shutter member toward the opening, A color measuring device characterized by:

6. 6. The color measuring device according to claim 1, wherein the incident light processing section comprises: a wavelength-variable optical filter that transmits a predetermined wavelength component of the incident light; a light receiving unit that receives light that has passed through the optical filter, A color measuring device characterized by:

7. 7. The color measuring device according to claim 6, wherein the optical filter is a Fabry-Perot etalon. A color measuring device characterized by:

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