Hidden mark checking device

Abstract

To provide a hidden mark checking tool capable of quickly and easily checking a hidden mark provided on a spectacle lens. [Solution] The checking tool of the present invention comprises a battery 2 as a power source, a light source 3 consisting of an LED that projects visible light, a pen-shaped housing 4 that can be held by a user and that houses the battery 2 and light source 3, and a light-emitting switch 5 formed on the outer surface of the housing 4 for turning the light source 3 on and off. A check light L for perceiving a hidden mark 51 on a spectacle lens 50 is emitted forward from the front end of the housing 4.

Description

[Technical field]

[0001] The present invention relates to a checking tool for visually checking hidden marks provided on eyeglass lenses. [Background technology]

[0002] On eyeglass lenses such as progressive multifocal lenses, additional information such as alignment reference marks, added refractive power, and the trademark name of the eyeglass lens are written as hidden marks. A conventional example of a device for visually recognizing such hidden marks is, for example, Patent Document 1 by the present applicant. Similar devices are also disclosed in Patent Documents 2 and 3.

[0003] The devices of Patent Documents 1 to 3 all include a main case that houses a light source and a lens holder that supports a magnifying lens, and a mounting surface for mounting a spectacle lens is provided on the upper part of the main case. In these devices, after the spectacle lens is placed on the mounting surface, illumination light from the light source is irradiated onto the spectacle lens through an irradiation opening opened on the mounting surface, and the light transmitted through the spectacle lens is captured by the magnifying lens, so that the hidden mark can be viewed through the magnifying lens. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-39401 A [Patent Document 2] JP 2010-85589 A [Patent Document 3] JP 2020-64025 A Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, in the devices of Patent Documents 1 to 3, illumination light from a light source is irradiated onto the eyeglass lens placed on the placement surface, and the light transmitted through the eyeglass lens is captured by a magnifying lens. Therefore, when the hidden mark cannot be seen, it is necessary to change the amount and direction of light irradiated onto the eyeglass lens, and this change work is troublesome. In addition, the device has large external dimensions such as the height, depth, and width of the entire device, and the device can only be installed in a relatively large space, which is inconvenient. The user must take a posture as if peering into the magnifying lens, and this posture change is also a disadvantage in that it is troublesome. Furthermore, the structure of the case is complicated, and a magnifying lens is required, which is disadvantageous in that the overall cost is high.

[0006] The objective of the present invention is to provide a hidden mark checking tool that can quickly and easily check hidden marks on eyeglass lenses. Another objective of the present invention is to provide a hidden mark checking tool that has a simple and compact overall structure and can be made inexpensive. [Means for solving the problem]

[0007] The checking device of the present invention includes a battery 2 as a power source, a light source 3 consisting of an LED that projects visible light, a pen-shaped housing 4 that contains the battery 2 and the light source 3 and can be held by a user, and a light-emitting switch 5 formed on the outer surface of the housing 4 for turning the light source 3 on and off. The checking device is configured so that a check light L for perceiving a hidden mark 51 on a spectacle lens 50 is emitted forward from the front end of the housing 4. The housing 4 includes a battery chamber 14 in which the battery 2 is disposed, a light source chamber 15 in which the light source 3 is disposed, and a reflector 12 disposed in front of the light source chamber 15 and modulates the projected light emitted from the light source 3 to emit it forward as the check light L. The checking device is characterized in that a pinhole-shaped transmission hole 31 is formed in a front wall 30 that partitions the front end of the light source chamber 15, and a circular tunnel-shaped reflector surface 41 with a uniform inner diameter is formed on the inner peripheral surface of the reflector 12.

[0008] It is desirable that the LED constituting the light source 3 projects red light having a wavelength of 620 to 750 nm. Effect of the Invention

[0009] When checking the hidden mark 51 on the eyeglass lens 50 using the hidden mark checking tool 1 (hereinafter referred to as the "checking tool") according to the present invention, the user first holds the housing 4 with one hand (for example, the right hand) and faces the front (direction of irradiation) of the checking tool 1 toward a wall surface W or the like. Next, the user picks up the eyeglass lens 50 with the other hand (left hand) and places it (the eyeglass lens 50) between the wall surface W and the checking tool 1, and then turns on the light-emitting switch 5 to irradiate the check light L toward the eyeglass lens 50. As a result, the check light L is irradiated onto the wall surface W through the eyeglass lens 50, and at the same time, the hidden mark 51 provided on the eyeglass lens 50 can be projected onto the wall surface W, so that the user can visually confirm the hidden mark 51. If the hidden mark 51 is not projected onto the wall surface W or the hidden mark 51 projected onto the wall surface W is difficult to see, the position of the eyeglass lens 50 can be changed or the irradiation direction of the check instrument 1 (the irradiation direction of the check light L) can be changed to change the irradiation position of the check light L relative to the eyeglass lens 50, so that the hidden mark 51 can be more accurately projected onto the wall surface W and made visible. Similarly, by changing the distance between the eyeglass lens 50 and the check instrument 1 or the distance between the wall surface W and the check instrument 1, the hidden mark 51 can be more accurately projected onto the wall surface W and made visible.

[0010] As described above, according to the checking device 1 of the present invention, simply by irradiating the checking light L on the eyeglass lens 50, the hidden mark 51 provided on the eyeglass lens 50 can be seen, so that the hidden mark 51 can be seen more quickly and easily than in conventional devices equipped with a main body case for accommodating a light source and a lens holder for supporting a magnifying lens. In addition, since the checking device 1 of the present invention is a hand-held light type device operated by a user by holding the housing 4, it is easy to change the irradiation direction of the checking device 1 (the irradiation direction of the check light L) and the distance between the eyeglass lens 50 and the checking device 1, and in this respect, the hidden mark 51 can be projected onto the wall surface W more quickly and easily to be seen. Since the checking device 1 of the present invention is a hand-held light type device, the overall structure can be made simpler and more compact than conventional devices, and the manufacturing cost can be reduced accordingly.

[0011] According to the knowledge of the present inventors, if the LED constituting the light source 3 projects red light having a wavelength of 620 to 750 nm, the hidden mark 51 provided on the eyeglass lens 50 can be clearly projected onto the wall surface W even under indoor lighting. Therefore, when using the checking tool 1 according to the present invention, it is not necessary to take measures such as turning off the indoor lighting, and in this respect, it becomes possible to visually confirm the hidden mark 51 more quickly and easily. [Brief description of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating a state in which a hidden mark checking tool according to an embodiment of the present invention is used; [Diagram 2] FIG. [Diagram 3] FIG. 2 is a block diagram of the checking device. [Figure 4] FIG. 4 is a vertical sectional side view of the front end portion of the checking device. [Diagram 5] FIG. 2 is a vertical sectional side view of the rear end portion of the check tool, illustrating a safety device. [Figure 6] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] 1 to 6 show an embodiment of a hidden mark checking tool (hereinafter simply referred to as a "checking tool") according to the present invention. In this embodiment, the terms "front, back, left, right, top, bottom" refer to the crossed arrows shown in Figs. 1 and 2 and the terms "front, back, left, right, top, bottom" in the vicinity of the crossed arrows.

[0014] As shown in FIG. 1, the checking tool 1 is used when checking the hidden mark 51 provided on the eyeglass lens 50, and is configured as a small flashlight type (hand light type) tool that is handheld and operated by the user. As shown in FIG. 2 and FIG. 3, the checking tool 1 includes a battery 2 as a power source, a light source 3 consisting of an LED that projects visible light, and a housing 4 that incorporates the battery and the light source. The battery 2 may be a secondary battery or a primary battery, and in this embodiment, a lithium ion battery that is a secondary battery is used. The LED that is the light source 3 projects red light having a wavelength of 620 to 750 nm. An operating part 5a of a light-emitting switch 5 for turning the light source 3 on and off is protruding from the upper part of the housing 4. The light-emitting switch 5 is a momentary switch, and when the operating part 5a is pressed from a state in which the light source 3 is off, the light source 3 is turned on, and a check light L (see FIG. 1) is irradiated from the front end of the checking tool 1. When the operation part 5a is released from being pressed, the light source 3 is turned off and the emission of the check light L from the checking tool 1 is stopped. In Figures 2 and 3, reference numeral 6 denotes a control part disposed behind the light source 3. In response to the operation part 5a of the light-emitting switch 5 being pressed as described above, this control part 6 controls the state of electrical current between the light source 3 and the battery 2, thereby controlling the on / off state of the light source 3.

[0015] As shown in Fig. 6, the housing 4 is composed of a base portion 10 in which the battery 2 and the light source 3 are housed, an end cap 11 attached to the rear end of the base portion 10, and a reflector 12 attached to the front end of the base portion 10. The base portion 10 has a cylindrical outer shape, and most of its outer circumferential surface is knurled to form grip grooves 13 for preventing slipping. The end cap 11 and the reflector 12 also have a cylindrical outer shape, and when these are attached to the front and rear of the base portion 10, the checking device 1 is configured to have a seamless, generally cylindrical shape that is long in the front-to-rear direction when viewed from the outside.

[0016] As shown in Fig. 2, a battery chamber 14 in which a battery 2 is disposed is formed on the rear side of the base part 10, and a light source chamber 15 in which a light source 3 is disposed is formed on the front side of the base part 10. As shown in Fig. 6, a female thread 16 is engraved on the inner surface of the opening of the cylindrical wall at the rear end of the battery chamber 14, and a male thread 17 is engraved on the outer circumferential surface of the cylindrical wall at the front end of the end cap 11. As described above, the end cap 11 can be screwed onto the base part 10 by screwing the male thread 17 of the end cap 11 into the female thread 16 of the base part 10.

[0017] As shown in FIG. 5, the end cap 11 has a built-in safety device 18. The safety device 18 is composed of a cylinder 21 that is rotated by a safety key 20. The cylinder 21 is provided with a switch mechanism that switches the current path derived from the battery 2 between a current-carrying state in which current flows and a non-current-carrying state in which current does not flow. When the long side direction of a long hole-shaped keyhole 22 formed on the rear end surface of the cylinder 21 exposed at the rear end of the end cap 11 faces "OFF" (the state shown in FIG. 5), the switch mechanism is in a non-conducting state, and the check device 1 cannot irradiate the check light L (the check device 1 cannot be irradiated). On the other hand, when the safety key 20 is inserted into the keyhole 22 from this state and rotated counterclockwise in the direction in which the long side direction of the keyhole 22 faces "ON", the switch mechanism becomes in a current-carrying state, and the check device 1 can irradiate the check light L (the check device 1 can be irradiated).

[0018] As described above, when not in use, the user can set the switch mechanism to a non-energized state and prevent the check light L from being emitted by inadvertently pressing the operating portion 5a of the light-emitting switch 5. In addition, when in use, the user can set the switch mechanism to an energized state and emit the check light L simply by inserting the safety key 20 into the keyhole 22 and rotating the cylinder 21.

[0019] As shown in Fig. 5, a strap hole 23 is formed in the end cap 11, and as shown in Fig. 2, a ring 27 passed through a ring hole 26 of the safety key 20 can be engaged with a strap cord 25 of a strap 24 passed through the strap hole 23, thereby holding the safety key 20 together with the strap 24 in the end cap 11 of the housing 4. When the strap 24 is attached to the check device 1 in this manner, simply hanging the strap 24 around the user's wrist can prevent the check device 1 from accidentally dropping during use. Furthermore, by engaging the safety key 20 with the strap 24, it is possible to reliably prevent the safety key 20 from being lost.

[0020] 2 and 4, a pinhole-shaped transmission hole 31 is formed in the front end of the light source chamber 15, i.e., in the front wall 30 that defines the front end of the base part 10, and the projection light emitted from the light source 3 is projected forward through this transmission hole 31. As shown in Fig. 6, a male thread 32 is engraved on the outer circumferential surface of the cylindrical wall at the front end of the base part 10, and a female thread 33 is engraved on the inner circumferential surface of the cylindrical wall at the rear end of the reflector 12. Therefore, the reflector 12 can be screwed onto the base part 10 by screwing the female thread 33 of the reflector 12 into the male thread 32 of the base part 10.

[0021] As shown in Fig. 4, the reflector 12 is composed of a cylindrical reflector body 35 and a nose portion 36 attached to the front end of the reflector body 35. The nose portion 36 is composed of a cylindrical insertion portion 37 inserted into the inner surface of the reflector body 35, and an annular ring portion 38 formed in front of the insertion portion 37 and having an outer diameter larger than that of the insertion portion 37. A circular tunnel-shaped reflector surface 41 with a uniform inner diameter is formed on the inner peripheral surface of the reflector 12 composed of the inside of the reflector body 35 and the inside of the insertion portion 37 constituting the nose portion 36, and the light projected from the transmission hole 31 is dimmed by the reflector surface 41 and then irradiated forward.

[0022] In the check tool 1 of this embodiment, when the irradiation direction of the check light L defined at the center of the inner peripheral surface of the reflector 12 is defined as the optical axis direction, and an imaginary plane including a direction perpendicular to the optical axis direction is defined in front of the reflector 12, a perfect circular irradiation area A made of the check light L is formed on the imaginary plane. More specifically, as shown in Fig. 1, when the check light L is irradiated toward a wall W with the direction toward the wall W as the forward direction, a perfect circular irradiation area A made of the check light L is formed on the wall W.

[0023] A male thread 39 is engraved on the outer peripheral surface of the insertion portion 37, and a female thread 40 is engraved on the inner peripheral surface of the cylindrical wall of the reflector body 35. The nose portion 36 can be screwed and attached to the reflector body 35 by screwing the male thread 39 of the nose portion 36 into the female thread 40 of the reflector body 35. The outer diameter of the ring portion 38 and the outer diameter of the reflector body 35 are approximately the same, and when the nose portion 36 is attached to the reflector body 35, the ring portion 38 and the reflector body 35 are formed to have a seamless, approximately cylindrical shape from the outside. The outer peripheral surface of the ring portion 38 is engraved with a vertical groove 42 running in the front-to-rear direction to prevent slipping (see FIG. 6).

[0024] As shown by the virtual lines in Fig. 4, the relative position of the nose portion 36 with respect to the reflector body 35 can be changed forward or backward by rotating the ring portion 38. By changing the relative position of the nose portion 36 forward or backward in this way, the position of the reflector surface 41 in the forward or backward direction with respect to the transmission hole 31 can be changed, and the degree of diffusion of the check light L can be changed. In other words, the diameter dimension of the circular irradiation area A (see Fig. 1) formed on the wall surface W can be changed.

[0025] A method for checking the hidden mark 51 using the check tool 1 configured as above will be described with reference to FIG. 1. First, the user releases the safety device 18 to enable the check light L to be emitted. Specifically, the user inserts the safety key 20 into the keyhole 22 and rotates it in a direction such that the long side of the keyhole 22 faces "ON". Next, for example, the user holds the housing 4 of the check tool 1 in the right hand, faces the front of the check tool 1 toward the wall W, and takes the eyeglass lens 50 in the left hand, places the eyeglass lens 50 between the wall W and the check tool 1, and then presses the operating part 5a of the light-emitting switch 5 to emit the check light L toward the eyeglass lens 50. As a result, the check light L is emitted to the wall W through the eyeglass lens 50, and at the same time, as shown in FIG. 1, the hidden mark 51 provided on the eyeglass lens 50 is projected onto the wall W, so that the user can visually check the hidden mark 51.

[0026] When the hidden mark 51 is not projected on the wall surface W or the hidden mark 51 projected on the wall surface W is difficult to see, the position of the eyeglass lens 50 is changed or the irradiation direction of the check instrument 1 (the irradiation direction of the check light L) is changed to change the irradiation position of the check light L relative to the eyeglass lens 50 so that the hidden mark 51 is projected on the wall surface W. Similarly, by changing the distance between the eyeglass lens 50 and the check instrument 1 or the distance between the wall surface W and the check instrument 1, the hidden mark 51 is more accurately projected on the wall surface W and made visible. In other words, even if the hidden mark 51 is not appropriately projected on the wall surface W and the projected hidden mark 51 cannot be read, the user can make the hidden mark 51 projected on the wall surface W visible by simply changing the irradiation condition of the check light L on the eyeglass lens 50 using the hand, such as changing the irradiation position of the check light L or the distance between the eyeglass lens 50 and the check instrument 1, as described above.

[0027] As described above, the diameter dimension of the circular irradiation area A formed on the wall surface W can also be changed by rotating the ring portion 38 to change the relative position of the nose portion 36 with respect to the reflector body 35 back and forth and thereby changing the fore-and-aft position of the reflector surface 41 of the reflector 12 with respect to the transmission hole 31. This also changes the degree to which the check light L is irradiated onto the eyeglass lens 50 and adjusts the state of the hidden mark 51 projected onto the wall surface W.

[0028] As described above, by using the check tool 1 of this embodiment, it is possible to more quickly and easily project the hidden mark 51 onto the wall surface W and visually confirm the hidden mark 51. Since the check tool 1 of this embodiment is a hand-lamp type tool, it has a simpler and more compact overall structure than conventional devices, and is therefore also excellent in that the manufacturing costs can be reduced accordingly.

[0029] The LED constituting the light source 3 projects red light having a wavelength of 620 to 750 nm, in other words, the irradiated light of the check light L is red light having a wavelength of 620 to 750 nm, so that the hidden mark 51 provided on the eyeglass lens 50 can be clearly projected onto the wall surface W even under indoor lighting. Therefore, there is no need to take measures such as turning off the indoor lighting when checking, and in this respect, the use of the check tool 1 of this embodiment allows the hidden mark 51 to be viewed quickly and easily.

[0030] The projection target of hidden mark 51 is not limited to wall surface W, and may be, for example, a projector screen. A diffusion filter may be placed in front of light source 3. The wavelength of the projection light irradiated from light source 3 is not limited to red light having a wavelength of 620 to 750 nm. Safety device 18 may be omitted. [Explanation of symbols]

[0031] 1. Hidden mark checking device 2 batteries 3 light source 4. Housing 5 Illumination switch 12 Reflector 14 Battery compartment 15 Light source room 30 front wall 31 Transmission hole 41 Reflector surface 50 Eyeglass Lenses 51 Hidden Mark

Claims

1. The device comprises a battery (2) as a power source, a light source (3) consisting of an LED that projects visible light, a pen-shaped housing (4) that houses the battery (2) and the light source (3) and can be held by a user, and a light-emitting switch (5) formed on the outer surface of the housing (4) for turning the light source (3) on and off; A hidden mark checking device configured to emit a check light (L) for detecting a hidden mark (51) on a spectacle lens (50) forward from a front end of a housing (4), comprising: The housing (4) includes a battery chamber (14) in which a battery (2) is disposed, a light source chamber (15) in which a light source (3) is disposed, and a reflector (12) disposed in front of the light source chamber (15) for adjusting the intensity of the projected light emitted from the light source (3) and irradiating the light forward as a check light (L); This hidden mark checking device is characterized in that a pinhole-like transmission hole (31) is formed in a front wall (30) that separates the front end of a light source chamber (15), and a circular tunnel-like reflector surface (41) with a uniform inner diameter is formed on the inner peripheral surface of a reflector (12).

2. 2. The hidden mark checking device according to claim 1, wherein the LED constituting the light source (3) projects red light having a wavelength of 620 to 750 nm.

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