JP2002099219A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which facilitates the mounting work of a display to a turning shaft without using tools. SOLUTION: The turning shaft 2 which is turnably pivotally supported at both ends to a body to be mounted is composed of a shaft part 21, diametrally expanding parts 22 and tapered parts 23. The liquid crystal display 3 is provided with a pair of lever members 4 and 4 having groove parts 41 fittable with the shaft part 21 from an axially perpendicular direction and engaging holes 42 engageable with the tapered parts 23. The lever members 4 and 4 are respectively turnable around supporting shafts 40 and 40 against the energization of leaf spring members 6 and are adapted to attain a first state in which the members face are in proximate to each other and a second state that the members part from each other. The mounting work is carried out by putting the lever members 4 and 4 into the first state and fitting the shaft part 21 into the groove parts 41, then forcing the lever members to attain the second state and engaging the tapered parts 23 and 23 with the engaging holes 42 and 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a so-called retract type display device which is normally housed and deployed when used.

[0002]

2. Description of the Related Art For example, a display device such as a liquid crystal display device mounted on the ceiling of an airplane cabin or a liquid crystal display device for a car navigation system is of a retractable type which is normally housed and deployed when used. Often adopted. This type of display device has a rotating shaft whose both ends are rotatably supported by a mounted body, and a rotating shaft that is fixed integrally with the rotating shaft and is integrally formed with the rotating shaft with respect to the mounted body. A rotating liquid crystal display.

In a conventional display device, for example, FIG.
As shown in FIG. 2, a notch portion 101a is provided to form a flat portion, and the rotating shaft 101 is used.
02 with the mounting surface 102a in contact with the rotating shaft 101 and the liquid crystal display unit 102 using a plurality of screw members 103.
And was fixed.

[0004] Alternatively, as shown in FIG. 13, a rotating shaft 111 is inserted into a groove 112 a formed at an end of the liquid crystal display unit 112.
And a plurality of screw members 114 are screwed to the side surface of the liquid crystal display unit 112 via a mounting bracket 113 integral with the rotating shaft 111 to be integrated with the rotating shaft 111.

[0005]

As described above, in the conventional display device, the rotating shafts 101 and 111 and the liquid crystal display units 102 and 112 are provided by using the screw members 103 and 114.
Has the following problems.

First, the greatest problem is that a tool such as a driver for tightening the screw members 103 and 114 is required. Therefore, the fixing portions of the liquid crystal display units 102 and 112 with respect to the rotating shafts 101 and 111 are required. It is necessary to perform the positioning and holding with one hand, and the workability and work safety are reduced. Also, when the weight of the entire liquid crystal display unit increases due to the increase in the screen size, the screw members 103, 11
4 must be increased, and the above-described workability and work safety are further reduced.

Furthermore, since the tool cannot be inserted unless the heads of the screw members 103 and 114 are visible, the mounting direction is greatly restricted, and workability becomes extremely difficult at a position higher than the head. Furthermore, if the heads of the screw members 103 and 114 are directly in contact with the eyes, there may be a problem in appearance, but in this case, a cover or the like for hiding the relevant parts is separately required.

The present invention has been made in view of the above problems, and has as its object to provide a display device that can easily perform an operation of attaching a display unit to a rotating shaft without using a tool.

[0009]

In order to solve the above-mentioned problems, a display device according to the present invention comprises a rotating shaft including a shaft portion and enlarged diameter portions formed at both ends of the shaft portion, respectively. The display unit is provided with a pair of lever members movable in directions approaching each other, with respect to these lever members,
A groove in which the shaft portion is fitted from a direction perpendicular to the axis, and an engagement hole that engages with the enlarged-diameter portion at the bottom of the groove portion are formed, and the pair of lever members are close to each other. In the first state, the shaft portion can be fitted into the groove portion, and in the second state in which the pair of lever members are separated from each other, the engagement hole can be engaged with the enlarged diameter portion. I have.

According to the present invention, the operation of attaching and detaching the display unit to and from the rotating shaft can be obtained only by operating the pair of lever members. And work safety.

[0011] The engagement holes formed in the pair of lever members, respectively, perform a function of preventing the display unit from falling off by engagement with the rotation shaft. Further, regarding the shape of this engagement hole and the shape of the portion of the enlarged diameter portion of the rotating shaft that engages with this,
If the rotation direction has asymmetry (for example, a truncated pyramid shape or a star shape), the relative rotation movement of the display unit with respect to the rotation axis can be prevented.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, a liquid crystal display device will be described as an example of a display device.

FIGS. 1 to 3 show a liquid crystal display device 1 according to the present embodiment. The liquid crystal display device 1 mainly includes a rotating shaft 2 and a liquid crystal display unit 3. The rotating shaft 2 is made of metal, and both ends thereof are rotatably supported on a mounting body (not shown) such as a wall, a ceiling, and a mounting table. Are attached integrally. The liquid crystal display unit 3 includes a front panel 3A and a rear panel 3
B, and a liquid crystal screen is incorporated between these panels (not shown).

First, the details of the rotating shaft 2 will be described.
As shown in FIG. 4A, the rotating shaft 2 has a shaft portion 21, an enlarged portion 22 formed at both ends of the shaft portion 21, and a larger diameter than the shaft portion 21. A tapered portion 23 having a circular cross-section, which communicates with the diameter portion 22 and gradually increases in shaft diameter from the shaft portion 21 toward the end thereof. In addition, each of the enlarged diameter portions 22 is, as shown in FIG.
A pair of inclined surfaces 24, 24 inclined at a predetermined angle are formed.

Next, the details of the liquid crystal display unit 3 will be described. As shown in FIG. 5A, a pair of metal lever members 4 and 4 are arranged between the front panel 3A and the rear panel 3B. Protrusions 43, 43 protruding outward are formed. The lever members 4, 4 are pressed by the projections 43, 43, respectively, so that the levers 4, 4 are formed at the lower ends thereof.
By pivoting around 0 and 40 as shown by the arrows, the respective upper end portions can be approached to each other. At this time, each of the lever members 4 and 4 can be moved to a position where the distance between the upper ends of the lever members 4 and 4 is shorter than the axial length of the shaft portion 21 of the rotating shaft 2.

On the back panel 3B, leaf spring members 6 and 6 as urging means for urging the pair of lever members 4 and 4 to positions opposite to each other are fixed by pins 7 and 7. Here, in the present embodiment, the protrusions 43, 43
The state in which the pair of lever members 4, 4 are brought close to each other by pressing is set to the first state, and the pressing of the projections 43, 43 is released to cause the pair of lever members 4, 4 to be separated from each other as shown. The state will be described below as a second state.

As shown in FIG. 6, a groove 41 having an opening width substantially equal to the diameter of the shaft 21 of the rotating shaft 2 is formed at the upper end of the lever members 4, 4. A chamfered portion 44 is formed at an open end of the groove portion 41. At the bottom of the groove 41, a truncated cone-shaped engaging hole 42 that matches the outer shape of the tapered portion 23 of the rotating shaft 2 is formed. This engagement hole 4
Numeral 2 is formed by drilling from the surface of the lever member 4 on which the projection 43 is formed to a position substantially half of the entire thickness of the lever member 4. As shown in FIG. 1 or FIG. , 4 assume the second state, the respective engaging holes 42, 42
The distance between the tapered portions 23 of the rotating shaft 2 is substantially equal to the distance between the tapered portions 23.

Next, as shown in FIGS. 2 and 5B, a pair of guide members 5 and 5 having a substantially V-shaped guide groove 51 are provided at outer positions of the pair of lever members 4 and 4, respectively. It is provided between the panel 3A and the back panel 3B. These guide members 5, 5 are provided with a pair of inclined surfaces 24,
The guide grooves 51, 51 are disposed corresponding to the portions of the enlarged diameter portion 22 of the rotating shaft 2 where the rotation shafts 24 are formed.
It is formed with the same inclination angle as the inclination angles of 4, 24.

The present embodiment is configured as described above. Next, this operation will be described.

First, a rotating shaft 2 supported by the above-mentioned attached body
The procedure for attaching the liquid crystal display unit 2 to the LCD will be described. Referring to FIG. 5A, the liquid crystal display unit 3 is normally in a state in which the pair of lever members 4, 4 are separated from each other by receiving the urging force of the leaf spring members 6, 6, as shown in the drawing, that is, the second state. It is in.

Then, the operator simultaneously presses the projections 43, 43 of these lever members 4, 4 using both hands, and moves the pair of lever members 4, 4 in a state where their upper ends are close to each other.
That is, the first state is set. Then, while maintaining this state, the liquid crystal display unit 3 is aligned and assembled to the rotating shaft 2 so that the guide member 5 is engaged with the inclined surface 24 of the rotating shaft 2.

FIGS. 7 and 8 show the relationship between the enlarged diameter portion 22 of the rotating shaft 2 and the guide member 5. FIG. After the alignment between the inclined surface 24 of the rotating shaft 2 and the guide member 5 (FIG. 7A,
8A), the enlarged diameter portion 22 of the rotating shaft 2 is fitted into the guide groove 51 of the guide member 5 (FIGS. 7B and 8B), and the guide groove 51 is formed.
The pivot shaft 2 is incorporated into the guide member 5 through the sliding contact between the pivot shaft 2 and the inclined surface 24 of the pivot shaft 2 (FIGS. 7C and 8C).

At this time, when the inclination direction of the inclined surface 24 is different from that of the guide groove 51, the rotation shaft 2 is rotated by the guide action from the guide groove 51, and the position of the inclined surface 24 is corrected. Is done. Therefore, the degree of freedom in the mounting direction (mounting angle) of the liquid crystal display unit 3 with respect to the rotating shaft 2 is increased.

FIG. 9 shows the shaft portion 21 of the rotating shaft 2 and the enlarged diameter portion 2.
3 shows the relationship between 3 and the lever member 4. The rotating shaft 2 is inserted into the groove 41 of the lever members 4 and 4 in the first state.
After the shaft portion 21 is fitted (FIG. 9A), the pressing on the projection 43 is released, and the pair of lever members 4, 4 are separated from each other by the urging force of the leaf spring members 6, 6. I do. Thereby, the lever member 4 moves outward along the shaft portion 21 of the rotating shaft 2 (FIG. 9B), and the engaging hole 42 of the lever member 4 engages with the tapered portion 23 of the rotating shaft 2 (FIG. 9B). (FIG. 9C).

Here, in the present embodiment, since the chamfered portion 44 is formed at the opening end of the groove 41, the groove 41 is formed.
The operation of inserting the rotating shaft 2 (the shaft portion 21) into the rotating shaft 2 is easy. Further, since the leaf spring members 6 and 6 for urging the pair of lever members 4 and 4 to the second state are provided, when the pressing of the lever members 4 and 4 is released, the lever members 4 and 4 are surely released.
Can be moved to the second state shown in the figure, and secure fixing of the rotating shaft 2 and the liquid crystal display unit 3 can be ensured.

As described above, the liquid crystal display unit 3 is attached to the rotating shaft 2. In particular, the engagement between the engagement hole 42 of the lever member 4 and the tapered portion 23 of the rotating shaft 2 provides a function of preventing the rotating shaft 2 and the liquid crystal display unit 3 from coming off. The rotation of the liquid crystal display unit 2 with respect to the rotation shaft 2 is suppressed by the engagement between the rotation shaft 2 and the inclined surface 24 of the rotation shaft 2.

Therefore, according to the present embodiment, the rotation shaft 2 and the liquid crystal display unit 3 can be easily attached without using a tool, and the liquid crystal display unit 3 is held by both hands. Since the work can be performed in the state, the workability and the safety of the work are improved, and the mounting work at a position higher than above the head is easy. Furthermore, since the mounting portion between the rotating shaft 2 and the liquid crystal display unit 3 is located at a location that is invisible to the user, there is no need for a member such as a cover that hides the mounting portion.

The liquid crystal display 3 is detached from the rotating shaft 2 by holding the liquid crystal display 3 with both hands while holding the projections 43,
43 at the same time to move the pair of lever members 4 and 4 to the first state.
Of the lever member 4 and the engagement hole 42 of the lever member 4 are released.
By pulling out the liquid crystal display unit 3 with respect to the rotating shaft 2 through the guide groove 1 and the guide groove 51, the operation can be easily performed.

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited thereto, and various modifications can be made based on the technical concept of the present invention.

For example, in the above embodiment, the rotation shaft 2 and the liquid crystal display unit 3 are prevented from coming off by the tapered portion 23 of the rotation shaft 2.
The rotation of the liquid crystal display unit 3 with respect to the rotation shaft 2 is restricted by the engagement of the lever member 4 with the engagement hole 42 of the lever member 4. Instead of this, the shape of the tapered portion 23 of the rotating shaft 2 is formed into a truncated pyramid shape, and the shape of the engaging hole 42 is changed to a truncated pyramid shape matching the shape. Then, the above-mentioned retaining action and the relative movement restricting action can be simultaneously obtained by the engaging action of the tapered portion and the engaging hole.

In the above embodiment, the leaf spring members 6 and 6 are used as urging means for urging the pair of lever members 4 and 4 to the second state. Or a helical spring may be provided on the support shafts 40, 40.

The rotating shaft 2 is connected to a shaft 21 and an enlarged diameter portion 22.
Although the taper portion 23 is interposed between the two, the taper portion 23 may be omitted. In this case, although the shape of the engagement hole 42 has a stepped shape, the same retaining function as described above can be obtained.

Further, in the above embodiment, the liquid crystal display device 1 has been described as an example of the display device.
Instead, the present invention is applicable to other display devices such as a plasma display device.

Further, in the present invention, as shown in FIGS. 10 and 11, the guide member 5 is disposed at a distance from the rotating shaft 2 whose both ends are rotatably supported by the attached body 60. By keeping the distance between the engagement holes 42, 42 of the pair of lever members 4, 4 constant, the liquid crystal display units 31, 3 having liquid crystal screens 61, 62, 63 of different screen sizes.
Either of 2, 33 can be attached. In addition,
FIG. 10 shows a first state in which the lever members 4 and 4 are close to each other. In FIGS. 10 and 11, parts corresponding to those in the above-described embodiment are denoted by the same reference numerals. .

[0035]

As described above, according to the display device of the present invention, the rotation shaft and the display unit can be easily mounted without using a tool, and the display unit can be held with both hands. Since the work can be performed while being held, the workability and the safety of the work are improved, and the mounting work at a position higher than above the head is also facilitated. Further, since a screw member is not required for the operation, a member such as a cover for hiding the head of the screw member is not required.

According to the second aspect of the present invention, it is possible to restrict the relative rotational movement of the display unit with respect to the rotation axis. Also,
According to the third aspect of the present invention, it is possible to facilitate the operation of engaging the lever member with the rotating shaft and to obtain a reliable retaining operation.

According to the fourth aspect of the present invention, it is possible to ensure the operation of securely attaching the display unit to the rotating shaft. According to the fifth aspect of the present invention, it is possible to easily perform the operation of inserting the rotating shaft into the groove of the lever member.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a display device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a partially broken side view of the same.

FIG. 4 is a view showing a rotating shaft according to the present invention, wherein A is a front view, and B is an enlarged cross-sectional view taken along the line [4B]-[4B].

FIG. 5 is a diagram showing a main part of a display unit according to the present invention,
Is a partially broken front view, and B is an enlarged cross-sectional view taken along the line [5B]-[5B].

FIG. 6 is a side view of the lever member according to the present invention.

FIG. 7 is a front view of an essential part for explaining an assembling operation process of the rotating shaft and the guide member according to the present invention.

FIG. 8 is a sectional side view of the same.

FIG. 9 is a front view of a main part for explaining an assembling operation process of the rotating shaft and the lever member according to the present invention.

FIG. 10 is a front cross-sectional view of a main part showing a modification of the embodiment of the present invention, wherein A to C show liquid crystal display units having different screen sizes.

FIG. 11 is a sectional side view of the same.

FIG. 12 is a perspective view of a main part for explaining a mounting state of a rotation shaft and a display unit of a conventional display device.

FIG. 13 is a perspective view of a main part for explaining a mounting form of a rotation shaft and a display unit of another conventional display device.

[Explanation of symbols]

1. Liquid crystal display device (display device) 2. Rotating shaft
3 ... Liquid crystal display unit, 4 ... Lever member, 5 ... Guide member, 6
... leaf spring member, 21 ... shaft part, 22 ... enlarged diameter part, 23 ... taper part, 24 ... inclined surface, 41 ... groove part, 42 ... engagement hole, 44
... chamfered part, 51 ... guide groove.

Claims (5)

[Claims] 1. A display device comprising: a rotating shaft pivotally supported by an attached body; and a display unit fixed integrally with the rotating shaft, wherein the rotating shaft is a shaft, The display unit has a pair of lever members movable in directions approaching each other, and the shaft unit includes the pair of lever members. A groove that fits in from the direction perpendicular to the axis and an engagement hole that engages with the enlarged diameter portion are formed at the bottom of the groove. In the first state in which the pair of lever members are close to each other, the shaft is A display device, wherein the engagement hole is engageable with the enlarged diameter portion in a second state in which the pair of lever members are separated from each other and can be fitted into the groove portion. 2. A substantially V-shaped guide slidably contacting the pair of inclined surfaces, wherein the enlarged diameter portion has a pair of inclined surfaces inclined toward the display portion. The display device according to claim 1, wherein a guide member having a groove is provided. 3. A portion of the enlarged diameter portion that engages with the engagement hole is formed of a tapered portion having a shaft diameter that gradually increases from the shaft portion toward an end thereof. The display device according to claim 1, wherein the display device has a truncated cone shape that matches the outer shape of the tapered portion. 4. The display device according to claim 1, wherein the display unit is provided with an urging means for urging the pair of lever members to the second state. 5. The display device according to claim 1, wherein a chamfer is formed at an opening end of the groove.