Cabinet

Abstract

To provide a cabinet effectively preventing entry of a foreign matter to the inside.SOLUTION: A cabinet 11 includes: a base part 12 including a bottom plate 12a and a side plate 12b; and a first cover part 13 including a top plate 13a and a frame-like side plate 13b and arranged so as to cover the base part 12 from upward. The side plate 12b of the base part 12 includes a cut-out part 12c in an upper surface side. The frame-like side plate 13b of the first cover part 13 includes a groove part 13d that fits to the cutout part 12c in a lower surface side.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a cabinet for accommodating optical members and the like. [Background technology]

[0002] Currently, some cabinets for housing optical components, precision equipment, and the like are provided with dust-proofing measures to prevent foreign matter such as dust and dirt from entering the interior of the cabinets.

[0003] For example, the cabinet of Patent Document 1 has a long and narrow rectangular opening formed on its top surface. The periphery of the opening is stepped, and a transparent plate (window) is attached to this stepped portion, with a liquid crystal display panel disposed inside the window. In addition, a dustproof member is disposed between the inner periphery of the window and the frame of the liquid crystal display panel.

[0004] This dustproof member prevents dust and other particles from entering between the display surface of the liquid crystal display panel and the window, thereby ensuring that a good display is always possible. The dustproof member is made of a sponge sheet (see Patent Document 1, paragraphs 0022 and 0023, and figure 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2008-180769 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the cabinet of Patent Document 1 has problems in that the sponge deteriorates over time and the passageway through which foreign matter can enter is relatively short, resulting in low dust-proofing effect.

[0007] The present invention has been made in consideration of the above circumstances, and has an object to provide a cabinet that is highly effective in preventing foreign objects from entering the interior. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a cabinet for accommodating components therein, the cabinet comprising a base portion having a bottom plate and side plates, and a first cover portion having a top plate and frame-shaped side plates and disposed so as to cover the base portion from above, the cabinet comprising: The side plate of the base portion has a cutout portion or an uneven portion on its upper surface, and the frame-shaped side plate of the first cover portion has a groove portion on its lower surface that fits into the cutout portion or uneven portion.

[0009] The present invention is a cabinet that includes a base portion and a first cover portion, and can house components therein. The side plate of the base portion has a notch or a concave / convex portion on the upper surface side, and the first cover portion that covers it from above has a groove on the lower surface side of the frame-shaped side plate. When the cabinet is assembled, the notch or the concave / convex portion fits into the groove, so that the passage through which foreign matter such as dust and dirt can enter the interior has a bent, non-linear structure. This makes it possible to realize a cabinet with high dustproofing effect.

[0010] In the cabinet of the present invention, it is preferable that in the portion where the cutout or uneven portion and the groove portion fit together, the total length of the passages, including the vertically extending gap passage and the horizontally extending gap passage, is greater than or equal to the thickness of the side panel.

[0011] According to this configuration, the total length of the passageway formed by the gaps where the notches or the concaves and convexities and the grooves fit together is equal to or greater than the thickness of the side plate of the base, so that the passageway through which foreign matter can enter is non-linear and has a certain length or greater. In other words, even if a foreign matter enters the passageway from the outside, it is difficult for the foreign matter to reach the inside of the cabinet. Note that, in this case, "vertical" includes "approximately vertical," and "horizontal" includes "approximately horizontal."

[0012] In the cabinet of the present invention, the first cover portion is preferably made of resin.

[0013] Since resin is a more flexible material than metal, the gap between the base part and the first cover part at the mating part can be narrowed to further improve the dustproof effect. Also, since resin is a part made by transferring the shape of a mold, there is a high degree of freedom in the shape, and the grooves can be easily made at low cost.

[0014] In the cabinet of the present invention, it is preferable that the top plate of the first cover portion has an opening, and the cabinet further includes a plate-shaped second cover portion that closes the opening from above.

[0015] According to this configuration, the top plate of the first cover has an opening, allowing freedom in the shape of the optical member. Also, the second cover is made to match the shape of the part and is placed on top to seal. When inspecting the inside of the cabinet, the second cover can be removed, making it easy to check.

[0016] In the cabinet of the present invention, it is preferable that the base portion has a stair portion that is stepped when viewed from above in a plan view, and the first cover portion has a locking portion that locks the stair portion.

[0017] According to this configuration, the base part and the first cover part are fixed by the step part and the locking part, respectively, other than the fitting part. The passage of the gap created by the step part and the locking part also has a bent, non-linear structure, which further improves the dustproof effect.

[0018] In the cabinet of the present invention, it is preferable that the total distance of the passageway between the adjacent portions of the stepped portion and the engaging portion is equal to or greater than the thickness of the side panel.

[0019] According to this configuration, the passage through which a foreign object can enter the inside is non-linear and has a certain length or more, so that even if a foreign object enters the passage from the outside, it is difficult for the foreign object to reach the inside of the cabinet. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is an overall view of an ophthalmic device (autokeratometric refractometer). [Diagram 2] FIG. 2 is a perspective view of an autorefractometer in an ophthalmic apparatus. [Diagram 3] FIG. 2 is an exploded view of the autorefractometer. [Figure 4] FIG. 3 is a cross-sectional view of the autorefractometer shown in FIG. 2 taken along line AA. [Diagram 5] FIG. 5 is an enlarged view of a region R1 in FIG. [Figure 6] FIG. 3 is a cross-sectional view of the autorefractometer shown in FIG. 2 along line BB. [Figure 7] FIG. 7 is an enlarged view of an area S in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of a cabinet according to the present invention will be described with reference to the drawings. This cabinet is a container for optical components for an autorefractometer, which will be described later. In this specification, "vertical" includes a substantially vertical state, and "horizontal" includes a substantially horizontal state.

[0022] Fig. 1 is a perspective view of an ophthalmic apparatus 1 according to an embodiment. As shown in Fig. 1, the ophthalmic apparatus 1 is a combined examination device capable of measuring various ocular characteristics such as intraocular pressure, ocular refractive power, and corneal curvature of a subject's (patient's) eye. The ophthalmic apparatus 1 is capable of measuring various ocular characteristics mainly through direct input operations by an examiner (doctor or nurse).

[0023] The ophthalmologic apparatus 1 includes a measurement head unit 10, a drive mechanism 20, a face support unit 30, a base unit 40, and a display unit 50. The face support unit 30 is attached to the examiner side of the base unit 40.

[0024] The face support unit 30 positions the subject's face within the measurement area (examination area) of the measurement head unit 10 when the ophthalmic apparatus 1 measures eye characteristics such as the intraocular pressure value of the subject's eye. Here, within the measurement area is within a range in which the measurement head unit 10 can be aligned with the subject's eye (for example, within a range in which an image of the anterior segment of the subject's eye can be acquired, and within a range in which index light can be irradiated onto the subject's eye).

[0025] The subject's face is positioned within the measurement area by contacting the face support part 30 and being supported by the face support part 30. In particular, the face support part 30 includes a chin rest part 30a on which the subject's chin is placed.

[0026] The drive mechanism 20 is composed of an actuator (not shown) such as a motor, and moves the measurement head unit 10 in three axial directions (X, Y, and Z directions in the figure) relative to the base unit 40. This allows the measurement head unit 10 to move in the three axial directions relative to the subject's eye. Then, by driving the drive mechanism 20 under the control of a control device (not shown), it is possible to adjust the alignment of the measurement head unit 10 in the three axial directions relative to the subject's eye.

[0027] The measurement head unit 10 is provided with a variety of ophthalmic measurement devices including a non-contact tonometer 10A and an autorefractometer 10B.

[0028] The non-contact tonometer 10A can measure the intraocular pressure of the subject's eye. Specifically, the non-contact tonometer 10A blows air from a nozzle toward the cornea of ​​the subject's eye to deform the cornea, detects the deformed state, and measures the intraocular pressure of the subject's eye in a non-contact manner. The autorefractometer 10B can measure the ocular refractive power and corneal curvature of the subject's eye using various optical systems.

[0029] The display unit 50 is attached to the back side of the measurement head unit 10 facing the examiner. For example, a touch panel monitor is used as the display unit 50. Under the control of the control device, the display unit 50 displays an observation image of the anterior segment of the subject's eye or measurement results such as the intraocular pressure value of the subject's eye. Furthermore, the display unit 50 displays an operation menu screen for performing various operations and a position adjustment screen for adjusting the position of the measurement head unit 10 in three axial directions (manual alignment).

[0030] Fig. 2 is a perspective view of an autorefractometer 10B included in the measurement head unit 10. Also, Fig. 3 is an exploded view of the autorefractometer 10B.

[0031] The cabinet 11 of the autorefractometer 10B is composed of a base portion 12, a first cover portion 13, and a second cover portion 14. The base portion 12 has a bottom plate 12a and side plates 12b. The first cover portion 13 has a top plate 13a and frame-shaped side plates 13b, and is disposed so as to cover the base portion 12 from above. The second cover portion 14 is a plate-shaped member that covers the top plate 13a.

[0032] The first cover part 13 is fixed to the base part 12 with screws, and the second cover part 14 is fixed to the first cover part 13 with screws. The optical members that constitute the autorefractometer 10B are accommodated inside the cabinet 11. A substrate mounting plate 15 is provided at a position adjacent to the frame-shaped side plate 13b of the first cover part 13.

[0033] 3, the top plate 13 of the first cover portion 13 is provided with an opening 13c to accommodate an optical member protruding upward. The second cover portion 14 has a protruding portion 14a corresponding to the shape of the optical member, and closes the opening 13c from above.

[0034] The top plate 13 of the first cover portion 13 may have a shape without the opening 13c. In that case, it is possible to reduce the number of parts constituting the cabinet 11. However, in this embodiment, when inspecting the inside of the cabinet 11, the second cover portion 14 is removed, which makes it easy to inspect the inside.

[0035] Both the first cover part 13 and the second cover part 14 are made of resin. This is because resin is made by transferring the shape of a mold, so there is a high degree of freedom in the shape, and the shape, including the shape of the groove part 13d described later, can be easily made at low cost.

[0036] Fig. 4 is a cross-sectional view taken along line AA of the cabinet 11 shown in Fig. 2. This cross-section taken along line AA includes the thick portion 12d of the base portion 12 (described in detail later).

[0037] As shown in region R1 of Fig. 4, the side plate 12b of the base portion 12 has a notch 12c on the upper surface side, which is formed by cutting a part of the side plate 12b. Furthermore, the frame-shaped side plate 13b of the first cover portion 13 has a groove 13d that fits into the notch 12c. A similar portion is also provided in the opposing position (region R2) of the cabinet 11. This so-called labyrinth structure helps prevent foreign matter such as dust and dirt from entering the cabinet 11.

[0038] FIG. 5 is an enlarged view of the region R1 shown in FIG.

[0039] 5, the groove 13d of the first cover part 13 has a concave structure that fits into the side plate 12b and the notch 12c of the base part 12. Since the resin first cover part 13 is more flexible than materials such as metal, the gap (about 0.25 mm) between the base part 12 and the first cover part 13 can be narrowed and kept constant in the path T formed in the fitting part.

[0040] In the mating portion, the vertical gap passages t1 and t3 are each 5 mm long, and the horizontal gap passage t2 is 2 mm long, so the length of path T, which is the total length of the paths through which foreign matter can enter (so-called labyrinth length), is 12 mm. When the cabinet 11 is assembled, path T has a bent, non-linear structure. This allows the cabinet 11 to have a high dustproofing effect. Note that path t', which has a wider gap than path T, is not included in the labyrinth length.

[0041] It is preferable that the total length of the path T, including the vertically extending passages t1 and t3 and the horizontally extending passage t2, is equal to or greater than the thickness D (approximately 5 mm) of the side plate 12b. This makes the path T non-linear and longer than a certain length. This makes it difficult for foreign objects to reach the inside, further improving the dustproofing effect of the cabinet 11.

[0042] In this embodiment, the base portion 12 is provided with the notch portion 12c, and the first cover portion 13 is provided with the groove portion 13d, but this is merely an example. For example, the base portion 12 may be provided with a concave-convex portion, and the first cover portion 13 may be provided with a structure that fits therewith, so that the two are fitted together to form a non-linear path in the fitted portion. Such a path may be composed only of linear passages, like the path T, or may include a curved path in part.

[0043] The fitting portion may be a part (one or more places) of the contact portion between the base portion 12 (side plate 12b) and the first cover portion 13 (frame-shaped side plate 13b), or may be formed around the entire periphery of the contact portion.

[0044] When fitting portions are formed at multiple locations, they do not all need to have the same structure. When optical members that are easily affected by dust, etc. are arranged near the side plate 12b, the path may be made long and complex in shape to enhance the dustproof effect.

[0045] For example, the region R2 in Fig. 4 has a structure that utilizes the thick portion 12d provided on the outer side of the side plate 12b. Specifically, the side plate 12b and the thick portion 12d form a recess that fits into the groove portion 13d. In the region R2, a path that is longer and more complicated than the above-mentioned path T is formed.

[0046] Fig. 6 is a cross-sectional view taken along line BB of the cabinet 11 shown in Fig. 2. This cross-section taken along line BB is a cross-section obtained by cutting the frame-shaped side plate 13b of the first cover portion 13 at approximately the center in the height direction, but the oblique lines indicating the cross-section of the optical members inside the cabinet 11 are partially omitted.

[0047] In the above description, the mating parts are vertically mated, but they may be horizontally mated and a certain degree of dustproofing effect can be expected. For example, in region S in FIG. 6, there is a portion where base portion 12 and first cover portion 13 are adjacent to each other.

[0048] FIG. 7 is an enlarged view of the area S shown in FIG.

[0049] 7, the base portion 12 has a stepped portion 12e that is planar and has a stepped shape when viewed from above, on the rear end side of the autorefractometer 10B. The first cover portion 13 has a locking portion 13e that is connected to the frame-shaped side plate 13b and locks the stepped portion 12e.

[0050] The base portion 12 and the first cover portion 13 are fixed together by the stepped portion 12e and the locking portion 13e with a small gap (about 0.25 mm) between them. In this manner, the path U of the gap between the adjacent stepped portion 12e and the locking portion 13e has a bent, non-linear structure.

[0051] Although the staircase section 12e has a structure that includes curved portions, the horizontal (Z direction) passage u1 is 2 mm long, the horizontal (X direction) passage u2 is 5.3 mm long, and the horizontal (Z direction) passage u3 connected to passage Y is 5.6 mm long, so the length of the path U (so-called labyrinth length) is 12.9 mm.

[0052] Again, it is preferable that the total distance of the path U is equal to or greater than the thickness D (approximately 5 mm) of the side panel 12b. This makes the path U through which foreign matter can enter the interior non-linear and of a certain length or greater, so that even if a foreign matter does enter the path U, it is difficult for it to reach the inside of the cabinet 11.

[0053] The present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit and scope of the present invention.

[0054] In the above embodiment, there is a fitting structure at the contact portion between the base portion 12 and the first cover portion 13, but this is not limited to this. For example, since the first cover portion 13 and the second cover portion 14 come into contact with each other, a notch, a concave-convex portion, a groove, or the like can be formed between the first cover portion 13 and the second cover portion 14 so that the fitting structure according to the present invention is formed between the two. This can reliably prevent foreign matter from entering the cabinet 11 from above. [Explanation of symbols]

[0055] 1...ophthalmic device, 10...measuring head section, 10A...non-contact tonometer, 10B...autorefractometer, 11...cabinet, 12...base section, 12a...bottom plate, 12b...side plate, 12c...cutout section, 12d...thick section, 12e...step section, 13...first cover section, 13a...top plate, 13b...frame-shaped side plate, 13c...opening, 13d...groove section, 13e...engagement section, 14...second cover section, 14a...protrusion, 15...circuit board mounting plate, 20...driving mechanism, 30...face support section, 30a...chin rest section, 40...base section, 50...display section.

Claims

1. A cabinet for accommodating components therein, comprising: a base portion having a bottom plate and side plates; and a first cover portion having a top plate and frame-shaped side plates and disposed so as to cover the base portion from above, The side plate of the base portion has a notch or a concave-convex portion on an upper surface side, A cabinet characterized in that the frame-shaped side plate of the first cover portion has a groove portion on the underside that fits into the cutout portion or the uneven portion.

2. 2. The cabinet according to claim 1, wherein in the portion where the cutout or uneven portion and the groove portion fit together, the total length of the passages, including the vertically extending gap passage and the horizontally extending gap passage, is greater than or equal to the thickness of the side panel.

3. The cabinet according to claim 1 or 2, wherein the first cover portion is made of resin.

4. The top plate of the first cover portion has an opening, The cabinet according to claim 1 or 2, further comprising a plate-shaped second cover portion that closes the opening from above.

5. The base portion has a step portion that is stepped when viewed from above in a plan view, The cabinet according to claim 1 , wherein the first cover portion has a locking portion that locks the stepped portion.

6. The cabinet according to claim 5 , wherein a total distance of a passage between adjacent portions of the stepped portion and the engaging portion is equal to or greater than a thickness of the side panel.

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