JP2581691Y2 - Light-shielded display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-shielding display device in which a cathode-ray tube display surface, a liquid crystal display surface and the like are covered with a light-shielding cover.

[0002]

2. Description of the Related Art As this type of device, there are display devices such as a radar and a fish finder for displaying a detected image on a CRT display surface or a liquid crystal display surface, and the brightness of a place of use and the brightness between daytime and nighttime are known. Depending on the differences, the light-shielding cover may be attached to or detached from the front of the display surface, and the light-shielding cover may be removed at the time of transportation and installed after equipment to reduce the loading capacity of the equipment. There is an operation of performing attachment / detachment operations, and it is desirable to have a structure that facilitates attachment / detachment work as much as possible, that is, a structure that is easy to attach / detach.

For this reason, as shown in FIG. 9, protrusions 101A and 1A are provided at opposed positions on the inner surface side of a tubular light-shielding cover 100 having both ends opened (referred to as a tubular shape in the present invention).
01B is made of a relatively hard resin material, and a display surface 20
The groove portions 201A and 201B are formed on the outer side of the frame portion 210 where the depth 210A formed on the outer periphery of the frame portion 201 is relatively long.
When mounted, the projections 101A and 101B are inserted into the groove portions 201A and 201B by forcibly opening and expanding the light-shielding cover 100 so that the projections 101A and 101B are inserted into the groove portions 201A and 201B. Forcibly open the inner diameter side of 100, and project protrusions 101A and 101B to groove 201A.
A configuration that allows the user to escape from 201B (hereinafter, referred to as a first related art) is also well known.

For this reason, as shown in FIG.
A part 111B of A is cut off so that the diameter can be changed, and the elastic part 112 provided on the outer periphery of the end of the light shielding cover 110 is used as a light shielding cover 110. (Hereinafter referred to as a second conventional technique) is known.

[0005]

The second prior art has a disadvantage that it cannot be applied to a quadrangular display surface because it cannot be attached or detached by changing its diameter.

According to the first prior art, when the depth 210A of the frame portion 210 is short, the front portion of the light-shielding cover 100 from the left and right directions where the projection portions 101A and 101B are not provided due to a collision with a person. Is applied, the projections 101A and 101B are formed with relatively small force by the moment about the other side as a fulcrum.
Since the light-shielding cover 100 comes off from the light-shielding member 201B and falls off, the light-shielding cover 100 cannot be put to practical use.

If the protruding portions 101A and 101B and the groove portions 201A and 201B are provided on the side surface, when a vertical force is applied, the protruding portions 101A and 201B fall off with a weak force due to a similar moment. Result.
After all, in the case of the first prior art, the depth 210A must be large, and the outer diameter of the frame portion 210 and the inner diameter of the light-shielding cover 100 must be kept to such a degree that there is no gap. Occasionally, a considerably high force is required, and there is a disadvantage that the attaching / detaching operation is difficult.

Further, when the depth 210A of the frame portion 210 is to be shortened or eliminated due to reasons such as downsizing of the apparatus, there is a disadvantage that it cannot be used. Therefore, tentatively, the first prior art and the second prior art are combined, and the projection portions 101A and 101B in the first prior art are combined.
May be provided on the outer side of the light-shielding cover side, and a groove portion corresponding to the protruding portion may be formed in a paragraph portion inside the frame portion 210. In this case as well, the same as in the case of the first prior art described above is considered. If the depth of the paragraph is shortened, the disadvantage that the light-shielding cover 100 falls off with a relatively weak force cannot be solved.

For this reason, there is a problem that even when the depth of the frame portion or the paragraph portion is reduced, it is desired to provide a simple and inexpensive configuration free from such inconvenience.
In the present invention, the engagement between the groove portion and the projection portion as described above is referred to as engagement.

[0010]

According to the present invention, a structure for engaging the groove portion and the projection portion as described above is provided at a position facing the outer periphery of the display surface, and a cylindrical light shielding cover is provided on the front surface of the display surface. In a display device with a light-shielding cover, the two cross-sectional shapes of the above-mentioned groove portion are provided in the opening portion with two corner-shaped portions arranged so as to face each other, and the lateral direction of one corner-shaped portion is provided. Is formed in a linear shape, and a groove portion forming means for forming a blind hole portion extending from the other corner portion to a portion facing the linear portion, and a cross section of the protrusion portion A projection portion forming means for forming a shape having an inclined portion on a side corresponding to the linear portion and a bulge portion on a side corresponding to the blind hole portion, and an opening in the groove portion; The diameter of the part and the thickness of the above projection, Mono-, or is obtained by adapted to solve the above problems due providing a diameter-thickness forming means for forming and slightly larger the thickness than the caliber.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings. 1, an operation panel 2 is provided on a front portion 21 of a display device 1000.
On the front side of the rectangular display surface 2 provided with 0, etc.,
As shown in FIGS. 2 and 3, a cathode ray tube 2 having a slightly recessed paragraph portion 22 and a protective window plate 25 is provided.
The groove portions 23A and 23B are provided at opposing positions on the outer periphery of the display surface 2 at No. 6, for example, at intermediate positions on the left and right sides.

As shown in FIGS. 2 and 3, the cross-sectional shape of the groove portions 23A and 23B is such that two corner-shaped portions b and c are provided in the opening portion a so as to be staggered and opposed to each other. -Shaped portion, that is, the lateral direction of the near-side corner-shaped portion b is formed in the shape of a straight line d, and the other corner-shaped portion, that is, the portion of the straight-side corner portion c from the straight-sided corner portion c. Is formed in a shape having a bag hole portion e that spreads out at a position facing the portion. In the case of the figure, since the blind hole e is formed from the rear side of the front part 21, in order to prevent water droplets from entering from the front side,
The packing 23C is press-fitted or adhered to the opening on the rear side of the blind hole e to seal it waterproof.

The display surface 2 is, for example, a cathode ray tube display surface or a liquid crystal display surface, and the front portion 21 is, for example, a portion forming a panel surface of a radar or a fish finder, and the front portion 21 is relatively large. It is formed of a hard elastic resin material, for example, an ABS resin material.

2 and 3, the light-shielding cover 1 is formed in a rectangular cylindrical shape having an outer diameter that fits into the rectangular shape of the paragraph portion 22 of the display surface 2 and has an end corresponding to the groove portions 23A and 23B. The portion 11 is provided with protrusions 12A and 12B.

As shown in FIG. 3, the cross section of the projections 12A and 12B is a straight line d in the cross section of the groove 23A and 23B.
Is formed on the side corresponding to the portion of the groove portion 23A, and the bulging portion g is formed on the side corresponding to the blind hole portion e in the cross section of the groove portions 23A and 23B. Hard elastic resin material, for example, front part 2
1 is formed of the same resin material.

The dimensions of the respective parts are, for example, numerical values (unit: mm) shown in FIG. 3, and the diameter W of the opening of the groove portions 23A and 23B and the thickness T of the protrusion portions 12A and 12B are the same. Alternatively, the thickness T is slightly larger than the diameter W, for example, about 0.1 mm in the dimensions shown in FIG.

The mounting operation of the light-shielding cover 1 is first performed by hand deformation as shown in FIG. 4 so as to reduce the diameter of the side provided with the protrusions 12A and 12B. The outer diameter D is formed so that the outside diameter is also inside, and the groove portion 23 is formed.
When the user positions his / her hand at the opening a of the A.23B and releases the hand, it stops with the inclined portions f of the protruding portions 12A and 12B entering. The stop position is a point where the diameter W and the thickness T are the same.

Next, from the inside of the light-shielding cover 1, a projection 12A is formed.
-If 12B is pushed by hand and forced into the groove portions 23A and 23B, the trouble-side corner portion b or the back-side corner portion c of the groove portions 23A and 23B is elastic and slightly in the front-rear direction. The bulge g moves through the opening a to move the blind hole e.
And enters the engaged state as shown in FIG. 5, and the light-shielding cover 1 is attached to the front surface of the display surface 2.

The operation at the time of removal may be performed by applying a force reverse to the operation at the time of mounting, and will not be described. In addition, when the light-shielding cover 1 is deformed as shown in FIG. 4 in the above-mentioned attaching / detaching operation, the size of the diameter of the light-shielding cover 1 in the vertical direction may become slightly larger. Make allowances for the diameter of the corresponding paragraph part.

In the present invention, the above parts include the following modifications. [1] The portion expressed as a straight line d includes a portion having an appropriate inclination and being formed in a very gentle arc shape having a curvature.

[2] The portion expressed as the inclined portion f includes the formation of a single inclined surface up to the root of the projecting portion. In this case, the thickness T is increased by the outer surface of the inclined portion f. What is necessary is just to comprise as a dimension between the outer surfaces of the part g.

[3] The portions expressed as the corner portions b and c are formed by forming an acute angle or by appropriately chamfering the corner.

[4] The portion expressed as the bulging portion g includes bulging not only with an arc shape as shown in the figure but also with a suitable hill shape such as a triangular hill shape or a crooked horn shape.

[Modification] The present invention can be modified as follows. (1) Projection portions 12A and 12B and groove portions 23A and 23B
Swap the front side shape and the back side shape with
For example, the engagement state is configured as shown in FIGS. 6 and 7.

(2) Protrusions 12A and 12B are provided on the front part 21 and grooves 23A and 23B are provided on the light-shielding cover 1, for example, as shown in FIGS. 6 and 7. It is configured to be in an engaged state.

(3) The same engagement structure as that of the projections 12A and 12B and the grooves 23A and 23B is provided on the outer side of the frame formed by forming the projection 24 on the outer periphery of the display surface 2, for example,
As shown in FIGS. 7 and 8, the light shielding cover 1 is configured to cover and engage with the outside of the frame-shaped portion.

(4) Projection portions 12A and 12B and groove portion 2
The engagement configuration with the 3A / 23B is set to a position facing the upper and lower surfaces of the display surface 2, for example, the upper and lower central portions H1 and H2 in FIG.
Is provided at a position corresponding to.

(5) The projection surface 12A, 12B and the groove portion 23A, 23B are formed on the display surface 2 having another shape such as a circular shape and the outer peripheral shape of the light shielding cover 1 formed in conformity with each other.
It is configured to provide the same engagement configuration as described above. In this case, the protruding portions 12A and 12B and the groove portions 23A and 23B can be formed so as to match the outer peripheral shape of the light shielding cover 1.

(6) The material forming the front part 21 and the material forming the light shielding cover 1 are made of different materials. In this case, the material of the light-shielding cover 1 can be made more flexible than the material of the front surface portion 21 so that the bulged portion f can be recessed and pass through.

(7) The projection portions 12A and 12B or the groove portions 23A and 23B are provided at positions slightly shifted from the end of the light-shielding cover 1 to the near side.

(8) In order to appropriately reduce the resistance force when the bulging portion g passes through the opening a, a notch j as shown in each figure is provided at a suitable position to form the opening a. Make it easy to open.

[0032]

According to the present invention, as described above, at the time of the mounting operation, the above-mentioned opening is opened by the component force when the inclined portion e enters the linear shape a, and the bulging portion f is formed. The light-shielding cover 1 is easily engaged even when a force is applied to the front end side of the light-shielding cover 1 due to a collision with a person, because the light-shielding cover 1 is engaged so as to enter the blind hole portion d and be hooked at the corner c. In addition, during the removal operation, if a force in the opposite direction to the mounting operation is applied to such an engaging portion, a force is required only at the moment when the bulging portion f passes, Since the inclined portion e has a small thickness, it can be easily removed.

Therefore, a light-shielding display device having a structure in which the light-shielding cover 1 can be easily attached and detached and which is not easily detached by a slight external force can be obtained, which is suitable for a radar, a fish finder, and the like to be equipped in a narrow ship. There are features that can be provided.

[Brief description of the drawings]

 The drawings show the embodiments, and the drawings show the following contents.

FIG. 1 is a perspective view showing the configuration of the present invention.

FIG. 2 is a cross-sectional view corresponding to a portion II in FIG.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a perspective view of a main part of the present invention.

FIG. 5 is a sectional view of a main part of the invention.

FIG. 6 is a sectional view of a main part of the present invention.

FIG. 7 is a perspective view of a main part of the present invention.

FIG. 8 is a sectional view of a main part of the present invention.

FIG. 9 is a perspective view showing the configuration of a conventional technique.

FIG. 10 is a configuration perspective view of a conventional technology.

[Explanation of symbols]

 1.100.110 Light-shielding cover 2.200 Display surface 11 End 12A, 12B, 101A, 101B Projection 21 Front part 22 Paragraph part 23A, 23B, 201A, 201B, 211 Groove part 23C Packing 25 Protective window plate 26 CRT 111A Cylindrical body 111B Cut-out part 112 Elastic ridge part 210 Frame part 210A Depth 1000 Display device a Opening part b ・ c Corner-shaped part d Linear part e Bag-shaped part f Inclined part g Swelling part j Cut-out part D Outside Diameter H1, H2 Central part W Diameter T Thickness

Claims (6)

(57) [Scope of request for utility model registration] 1. A display with a light-shielding cover having a configuration in which a groove portion and a projection portion are engaged with each other at a position facing the outer periphery of a display surface, and a cylindrical light-shielding cover is attached to and detached from the front surface of the display surface. An apparatus (hereinafter, referred to as an apparatus), wherein two cross-sectional shapes of the groove portion are provided in an opening portion so as to be staggered and opposed to each other, and a lateral direction of one of the corner portions is straight. A groove portion forming means formed in a shape having a blind hole portion extending from the other corner portion to a portion facing the linear portion, and a cross-sectional shape of the protrusion portion, A projecting portion forming means for providing an inclined portion on a side corresponding to the linear portion and having a bulging portion on a side corresponding to the blind hole portion; a diameter of an opening portion of the groove portion and a front projection; The thickness of the part is the same, or An apparatus comprising: a diameter / thickness forming means for forming the thickness slightly larger than the diameter. 2. The apparatus according to claim 1, wherein the groove portion forming means is formed by arranging the blind hole portion on the back side, and the protrusion is formed by arranging the bulging portion on the back side. And means. 3. The apparatus according to claim 1, wherein the groove portion forming means is formed by arranging the blind hole portion on the near side, and the protrusion is formed by arranging the bulging portion on the front side. And means. 4. The apparatus according to claim 1, further comprising: the projection portion forming means for providing the inclined portion from the middle of the projection portion and forming the bulging portion in an arc shape. An apparatus characterized by the above. 5. The device according to claim 1, wherein the groove portion is provided on a front side of the display surface, and the protrusion portion is provided on an end of the light-shielding cover. An apparatus comprising: a projection portion forming means. 6. The device according to claim 1, wherein the groove portion is provided at an end of the light shielding cover, and the protrusion is provided on a front side of the display surface. An apparatus comprising: a projection portion forming means.