JPH0624121Y2 - Fluorescent display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a fluorescent display device having a front panel mounted with a fluorescent display tube having a box-shaped envelope composed of a substrate, a side plate and a front plate. It is a thing.

[Prior Art] Generally, in a fluorescent display tube, a linear cathode that emits electrons, a control electrode that accelerates and controls electrons, and a phosphor layer that emits light by electron bombardment are attached to a flat box-shaped envelope. It has a structure in which the formed anode and the like are arranged. The various electrodes are connected to an external drive circuit by means of metal leads that lead out the envelope in an airtight manner, and the fluorescent display tube is driven by the drive circuit to obtain a desired luminescent display.

When the fluorescent display tube is mounted on an electronic device such as an audio system or a VTR, as shown in the sectional view of FIG. 7, a display substrate 102 is provided on the back side of a front panel 101 and folded into an L shape. Metal lead 1 of bent fluorescent display tube 103
07 was inserted into the through hole of the display substrate 102 and fixed by soldering. The upper side of the fluorescent display tube 103, which is the opposite side of the portion where the metal lead 107 is led out, is also fixed to the display substrate 102 by the holder 104. Since the fluorescent display tube 103 occupies most of the area of the display substrate 102, it is necessary to provide a drive circuit for driving the fluorescent display tube in a separately prepared space. The substrate provided for arranging the drive circuit in this way is referred to as a main substrate 109, and as shown in the drawing, the main substrate 109 is electrically connected to the display substrate 102 by a flexible cable 108 (abbreviated as FPC). It had been.

[Problems to be Solved by the Invention] The conventional fluorescent display tube mounting structure has the following problems.

(1) When mounting a fluorescent display tube on an electronic device, a display substrate having a larger area than the fluorescent display tube, a main substrate for providing a drive circuit, and an FPC for connecting both molds are required. Met. As a result, the space for mounting these components becomes large, and it has become difficult to meet the recent trend toward miniaturization of electronic devices.

(2) Since the fluorescent display tube is fixed to the display substrate,
It has been difficult to fit the front panel of an electronic device. Therefore, the fluorescent display tube is located considerably behind when viewed from the front of the electronic device, and is difficult to see from the side. That is, there is a problem that the viewing angle that can be properly viewed is narrow.

(3) Further, in order to prevent the above-described vibration of the fluorescent display tube, the holder 104 may be provided above the fluorescent display tube as described above. As described above, according to the conventional mounting structure, since the number of components including the display substrate, the holder, the FPC, and the main substrate is large, there is a problem that the cost is increased.

[Means for Solving the Problems] In the fluorescent display device of the present invention, a fluorescent display tube having a box-shaped envelope formed by sealing a side plate between a facing substrate and a front plate is attached to a front panel. In the fluorescent display device, at least a part of each of the substrate and the front plate is extended to the outside of the side plate to form a concave portion, and the concave portion is fitted to a protruding portion of the front panel to front the fluorescent display tube. It is characterized by being directly attached to the panel.

[Operation] If a front panel or the like of an electronic device or the like is inserted into the concave portion formed by the substrate, the front plate, and the side plate that are extended to the outside of the side plate,
The display tube can be directly attached to the front panel or the like.

[Embodiment] A first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The fluorescent display tube 1 of the present embodiment includes a substrate 2 and a front plate 3 that face each other.
A side face plate 4 is circumferentially arranged between the two, and a flat box-shaped envelope 5 in which these are sealed is provided. The inside of the envelope 5 is kept in a high vacuum state, and various electrodes are stored therein. In the figure, 6 is an anode as a light emitting display section provided on the inner surface of the substrate 2, 7 is a control electrode, and 8 is a filament cathode.
As shown in FIG. 1, in this embodiment, the base plate 2 and the front plate 3 are protruded outward from the side plate 4 on the upper and lower sides of the envelope 5 to form the recesses 9 and 10 for mounting. I am configuring.
In the recessed portion 9 on the upper side by forging, the protruding length of the substrate 2 is set shorter than that of the front plate 3. On the inner surface of the projecting portion of the substrate 2 which is set to be short, external terminals are formed that are electrically connected to the respective electrodes in the envelope 5 in an airtight manner. The external terminal may be a lead member made of a metal plate or a printed wiring. Next, reference numeral 11 in FIG. 1 is a front panel of an electronic device in which the fluorescent display tube 1 is mounted. Hole 11 in front panel 11 to which the fluorescent display tube 1 is attached
Projections 12 and 13 are formed on the upper edge and the bottom edge of a, and these projections 12 and 13 are fitted in the recesses 9 and 10 of the fluorescent display tube 1. The distance between the protrusions 12 and 13 is slightly larger than the dimension of the fluorescent display tube 1 measured at the side plate 4. Then, as shown in the figure, the protrusion 13 on the lower edge side has a substantially rectangular cross section,
A slope 12a is formed inside the protrusion 12 on the upper edge side. Further, a bald portion 14 having a thickness of the front plate 3 is formed outside the protrusion 12 on the upper edge side, and when the fluorescent display tube 1 is attached, the front plate 3 on the upper side, which is longer than the lower side, is temporarily inserted. You can do it.

Next, a mounting structure of the fluorescent display tube 1 on the front panel 11 will be described. First, the protrusion 13 is inserted into the recess 10 on the lower side of the fluorescent display tube 1 via the rubber bushing 15 so that the fluorescent display tube 1 does not vibrate. On the other hand, in the recess 9 on the upper side of the fluorescent display tube 1, an anisotropic conductive member 16 having a right-angled triangular cross section is provided on the external terminal of the substrate 2 with its slope facing the front plate 3 side. An end portion 17 of the FPC is press-fitted between the sloped surface of the anisotropic conductive member 16 and the sloped surface 12a of the protruding portion 12, and the fluorescent display tube 1 is attached to both the protruding portions 12 and 13 and is different. It is connected to the FPC via the anisotropic conductive member 16. In this embodiment, since the protruding length of the substrate 2 on the upper side is slightly shortened, the work of press-fitting the anisotropic conductive member 16 and the FPC into the recess 9 at the time of mounting the fluorescent display tube 1 should be performed without difficulty. You can 18 is a main board, and the FPC is connected to a drive circuit on the main board 18. A filter 19 is provided on the front surface of the front panel 11, and the filter 19 also has a function of pressing the fluorescent display tube 1 from the front. The anisotropic conductive member 16 in the present embodiment is, for example, a flexible connector in which conductive layers and insulating layers are alternately laminated at a fine pitch, and has an appropriate pressure between both contacts. By interposing, the corresponding contacts can be electrically connected to each other without precise alignment. Although there are various concrete structures of the conductive part and the insulating part, other than the above, for example, a structure in which a number of thin metal wires are embedded in the thickness direction in a silicon rubber sheet which is an insulator is known. ing.

This embodiment is an example in which the fluorescent display tube 1 is attached to the front panel 11 at the upper and lower sides, but it may be attached to the front panel at the right and left sides, or as shown in FIG. It is also possible to form recesses 20 and 21 on two sides and fix the front panel 11 on the four sides. That is, as shown in the figure, the burr 14 for inserting the fluorescent display tube 1 into the protrusion of the front panel 11 is provided not only on the upper edge of the front panel 11 but also on the left edge thereof. Further, the rubber bushing 15 is interposed between the protrusions 13 and 22 on the lower edge and the right edge of the front panel 11 and the recesses 10 and 21 on the lower and right sides of the fluorescent display tube which are fitted therein. Can be

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. The same components as those in the first embodiment are designated by the same reference numerals as those in FIGS. 1 and 2 and their description is omitted. Fourth
As shown in FIGS. (A) and (b), in this embodiment, the upper edge portion 25 of the front panel 24 has a built-in structure that is vertically slidable. In mounting, first, the upper edge portion 25 of the front panel 24 is removed, and the projection portion 13 at the lower edge is inserted into the recess 10 on the lower side of the fluorescent display tube 1 through the rubber bushing 15. An FPC is provided on the substrate 2 in the recess 9 on the upper side of the fluorescent display tube 1 so as to be electrically connected to the external terminal.
The protrusion 27 of the upper edge portion 25 is press-fitted between the FPC and the front plate 3 via the rubber bushing 15.

In this embodiment, recesses 9 and 1 are formed on the upper and lower two sides of the fluorescent display tube 1.
0 is provided, but recesses 20 and 21 are provided on the left and right sides, and correspondingly, protrusions are provided on the left and right edges of the front panel 24,
The fluorescent display tube 1 may be fixed. Alternatively, recesses may be provided on the four sides of the upper, lower, left, and right sides, and corresponding protrusions may be provided on the front panel 24 so that the front panel 24 is fixed on all four sides.

In each of the embodiments described above, the fluorescent display tube 1 and the FPC were connected by pressure bonding via the anisotropic conductive members 16 and 26. However, as shown in FIG. 5, the lead terminal or electrode terminal of the fluorescent display tube and the FPC may be connected by soldering. In this case, as shown in FIG. 5 and FIG. 6, the substrate 2 is projected to the outside more largely than the front plate 3 at the connecting portion.

[Advantages of the Invention] According to the fluorescent display device of the present invention, the substrate and the front plate of the envelope are extended outward to form a recess, and the recess is attached to a panel or the like. It is possible to obtain the effect like.

(1) The display substrate is not required to mount the display tube, and the number of parts is reduced. Installation space is small.

(2) Since it can be fixed in the same row as the front panel, a proper viewing angle is widened.

[Brief description of drawings]

1 is a sectional view of a first embodiment of the present invention, FIG. 2 is a front view of a modification of the same embodiment, FIG. 3 is a sectional view of a second embodiment of the present invention, and FIG. 4 (a). Is a front view of the same embodiment, (b) is a partially enlarged sectional view taken along the line aa in (a) of FIG. 5, and FIG. 5 is a front view of a display tube according to another embodiment of the present invention. Sixth
FIG. 7 is a sectional view showing a mounting structure of the display tube, and FIG. 7 is a sectional view showing a mounting structure of a conventional fluorescent display tube. DESCRIPTION OF SYMBOLS 1 ... Fluorescent display tube as a display tube, 2 ... Substrate, 3 ... Front plate, 4 ... Side plate, 5 ... Envelope, 9, 10, 20, 21 ... Recessed part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyoshi Suzuki, 629 Oshiba, Mobara-shi, Chiba, Futaba Electronics Co., Ltd. ) Inventor Masato Izumi 629 Futaba Electronics Industrial Co., Ltd., Mobara-shi, Chiba Prefecture (72) Nobuo Akiha 629 Oshiba Shiba, Mobara-shi, Chiba (56) Bibliography Sho 59-96753 ( JP, U)

Claims (1)

[Scope of utility model registration request] 1. A fluorescent display device having a front panel mounted with a fluorescent display tube having a box-shaped envelope formed by sealing a side plate between a facing substrate and a front plate, wherein each of the substrate and the front plate is provided. A fluorescent display in which at least a part of the fluorescent display tube is directly attached to the front panel by extending at least part of the side plate to form a recess, and fitting the recess into a protrusion of the front panel. apparatus.