JP2000350121A - Cathode ray tube display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cathode ray tube display device that can produce a low frequency sound easy of listening with excellent reproducibility of the low sound frequency and effectively enhance the low frequency sound where a standing wave is hardly caused. SOLUTION: A cabinet 2 contains a cathode ray tube 1 and a box speaker 60 provided with a cathode ray tube 1 and a speaker 4. The box speaker 60 has a duct 50 a from which a low frequency sound is emitted, and an opening 2c to emit the low frequency sound from the duct 50a to the outside is formed to an upper face of the cabinet 2. The duct 50a is not communicated with the opening 2c and the low frequency sound from the duct 50a is reflected in a funnel section 1f and emitted from the opening 2c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube display having a box speaker provided with a speaker in a box, and more particularly to a cathode ray tube display capable of effectively enhancing bass.

[0002]

2. Description of the Related Art FIG. 2 is an exploded perspective view showing an example of a conventional cathode ray tube display device in a partially broken state, and FIG. 3 is a side sectional view showing an example of a conventional cathode ray tube display device. 2 or 3, a cathode ray tube (hereinafter referred to as CRT)
1 is housed in a cabinet 2. The dome horn 3 having a sound conduit has a vertically long opening 3a for sound emission on the front (screen) side of the CRT 1, and a circular opening 3b on the neck side of the CRT 1. A speaker 4 is fixed to the rear end face of the dome horn 3. The speaker 4 is mounted to face the opening 3b so that sound emitted from the speaker 4 is guided into the dome horn 3 from the opening 3b.

At the rear end of the dome horn 3, a box 5 for enhancing bass is further covered so as to cover the speaker 4.
Is attached. The box 5 has a duct 5a for emitting bass to the outside. On the back of the cabinet 2, the bass from the duct 5a is
An opening 2a for emitting sound to the outside is formed. The box speaker 6 including the dome horn 3, the speaker 4, and the box 5 is attached to the cabinet 2. A pair of box speakers 6 are provided on the left and right as viewed from the front side of the CRT 1.

FIG. 4 is a side sectional view showing another conventional example. 4, the same reference numerals are given to the same functional portions as those in FIGS. 2 and 3, and the description thereof will be omitted. In the conventional example shown in FIG. 4, an upward duct 5 b is formed in the box 5, and an opening 2 b for emitting low-frequency sound from the duct 5 b to the outside of the cabinet 2 is formed at the upper end of the front surface of the cabinet 2. Things. In the case of this configuration, a low sound emitted from the duct 5b interferes inside the cabinet 2 to generate a standing wave. Therefore, as indicated by the broken line, it is difficult for low-frequency sounds to be emitted from the opening 2b.

Therefore, as in the conventional example shown in FIGS. 2 and 3, a duct 5a is provided at the rear end side of the box 5 so that bass can be emitted from the opening 2a on the back of the cabinet 2. Was common.

[0006]

In the conventional example shown in FIGS. 2 and 3, since the bass is emitted from the back side of the cathode ray tube display device, the viewer hears the bass reflected on the wall or the like. For this reason, there is a problem that the reproducibility of the bass is poor, and a phase shift occurs between the sound emitted from the front surface (the opening 3a) and the reflected bass, which may make it difficult to hear the sound.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has good bass reproducibility, emits easy-to-hear bass, hardly generates a standing wave, and effectively enhances bass. It is an object of the present invention to provide a cathode ray tube display device capable of performing the above.

[0008]

According to the present invention, a cathode ray tube (1) housed in a cabinet (2) and a speaker (4) in a box are provided in order to solve the above-mentioned problems of the prior art. In the cathode ray tube display device having a box speaker (60) housed in the cabinet, a duct (50a) provided in the box speaker for emitting low-frequency sound and a duct formed in the cabinet are provided. An opening (2c) for emitting the low frequency sound to the outside, the duct is not connected to the opening, and the low frequency sound from the duct is reflected by the funnel (1f) of the cathode ray tube. It is another object of the present invention to provide a cathode ray tube display device characterized in that sound is emitted from the opening.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cathode ray tube display according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side sectional view showing one embodiment of the cathode ray tube display device of the present invention. In FIG. 1, the same portions as those in FIGS. 2 to 4 are denoted by the same reference numerals, and the description thereof may be omitted as appropriate.

In FIG. 1, a CRT 1 is housed in a cabinet 2. Dome horn 3 with sound conduit
A speaker 4 is fixed to the rear end face of the speaker 4. The specific configuration of the dome horn 3 is as described with reference to FIG. 2 and not shown here, but a vertically long opening 3a for sound emission and a circular opening 3b are provided on the front (screen) side of the CRT 1. And On the rear end face of the dome horn 3, a box 50 for enhancing bass is further attached so as to cover the speaker 4.

The box 50 has a duct 50a for emitting bass to the outside. Duct 50a
Faces obliquely upward from the front. An opening 2c is formed on the upper surface of the cabinet 2 to emit low-frequency sound from the duct 50a to the outside of the cabinet 2.
The duct 50a and the opening 2c are not connected. The duct 50a and the opening 2c are provided so that a line connecting the duct 50a and the opening 2c substantially follows the surface of the funnel 1f of the CRT 1. The above box speaker 60 composed of the dome horn 3, the speaker 4, and the box 5
It is attached to cabinet 2. Box speaker 6
A pair of 0s are provided on the left and right as viewed from the front side of the CRT 1.

In the above configuration, the duct 50a
As shown in FIG. 1, the bass emitted from the opening 2 c
Sound is emitted more directly or is reflected from the surface of the funnel portion 1f and emitted from the opening 2c. That is, the funnel unit 1
The surface of f functions as a sound guide plate or a reflection plate for guiding bass to the opening 2c. Since the opening 2c is provided on the extension of the duct 50a, standing waves are hardly generated in the cabinet 2. The bass reflected on the surface of the funnel 1f is guided to the opening 2c according to the shape of the upper and back surfaces of the funnel 1f. Sound will be emitted from 2c. The sound emitted from the front surface (the opening 3a) and the bass sound from the opening 2c have almost no phase shift, and can be a sound that is easy to hear.

The box speaker 60 is connected to the CRT 1
When a pair is provided on the left and right as viewed from the front side, the openings 2c may be provided separately on the left and right, or the openings 2c on the left and right may be connected to form one opening 2c. The present invention is not limited to this embodiment described above,
Various changes can be made without departing from the spirit of the present invention.

[0014]

As described above in detail, the cathode ray tube display device of the present invention emits low-frequency sound from a duct provided in a box speaker and low-frequency sound from a duct formed in a cabinet to the outside. It has an opening for sound, the duct is not connected to the opening, and the bass from the duct is reflected by the funnel part of the cathode ray tube and is emitted from the opening, so the reproduction of bass This makes it easy to emit low-pitched sounds that are easy to hear, hardly generates standing waves, and can effectively enhance low-pitched sounds.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a conventional example in a partially broken state.

FIG. 3 is a side sectional view showing a conventional example.

FIG. 4 is a side sectional view showing another conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cathode ray tube (CRT) 1 f funnel 2 cabinet 2 c opening 3 dome horn 4 speaker 50 box 50 a duct 60 box speaker

Claims (2)

[Claims] 1. A cathode ray tube display device having a cathode ray tube housed inside a cabinet and a box speaker housed inside the cabinet with a speaker inside a box, wherein a bass sound provided in the box speaker is emitted. A duct for sounding, and an opening for emitting low-frequency sound from the duct formed in the cabinet to the outside, wherein the duct is not connected to the opening, and the low-frequency sound from the duct is A cathode ray tube display device characterized in that sound is reflected from a funnel portion of the cathode ray tube and emitted from the opening. 2. The cathode ray tube display device according to claim 1, wherein a line connecting the duct and the opening is substantially along a surface of a funnel portion of the cathode ray tube.