JP3117879B2 - Tightening band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening band,
In particular, the present invention relates to a tightening band for fixing a convergence device to a cathode ray tube (CRT) used in a color television receiver.

[0002]

2. Description of the Related Art A schematic structure of a cathode ray tube of a conventionally known color television receiver is shown in FIG. Describing the internal structure, reference numeral 102 denotes a neck portion of the cathode ray tube 100. The neck portion 102 has a built-in electron gun composed of a heater, a cathode (cathode), and a control grid (grid). In the case of a color television, three electron guns are provided for RGB. Further, a fluorescent material is applied to the inner wall surface of the tube surface 103 for displaying an image to form a fluorescent surface 104. The phosphor screen 104 is thinly plated with metal to form an anode.

With this configuration, the beam bundle extracted from the electron gun is accelerated by the anode voltage, and hits the phosphor screen 104 so that the phosphor emits a point light. Further, an image is projected on the tube surface 103 by scanning the beam bundle by deflecting it in the horizontal and vertical directions by the deflection yoke 106.
Note that a convergence device 110 is disposed immediately before the deflection yoke 106.

FIG. 9 is an exploded perspective view of the convergence device 110. A ring-shaped support 113 protrudes from an intermediate portion of a cylindrical mounting main body 112 fitted into the neck portion 102 of the cathode ray tube 100. The mounting body 112 is formed of a synthetic resin. A screw 112a is engraved on one end of the mounting main body 112, and the side where the screw 112a is engraved (the side of the screw 112a with the support 113 as a boundary) is referred to as a mounting portion 112A. The mounting portion 112A includes four ring-shaped static magnets 114, 115, 11
6, 117 are rotatably mounted, and two purity magnets 118, 119 are rotatably mounted. The static magnet 11
4, 115, 116 and 117 form a set of two. Further, spacers 120 and 121, which are insulating materials, are arranged between the three sets of magnet plates.

[0005] Three sets of magnets and spacers 120 and 121 are arranged on the mounting portion 112A of the mounting body 112, and a ring-shaped spacer 12 is further provided on the end side.
2, a fixing ring 123 is screwed onto the screw 112a, and a magnet plate or the like is mounted.

On the opposite side of the mounting body 112 from the mounting portion 112A with the support 113 as a boundary, there is a fixing portion 112B. The fixing portion 112B has a plurality of arc pieces 124.
It consists of. And, in the fixing portion 112B,
A fastening band 126 for fixing the mounting main body 112 to the neck portion 102 of the cathode ray tube 100 is mounted.
The tightening band 126 has both ends of the band member 128 erected, and a tightening screw 130 is screwed to the erected portions 128a. A notch 129 is formed at the edge of the band member 128 in the width direction.

A projection 113a is formed on the side of the support body 113 of the mounting body 112 on the side of the arc piece 124 (see FIG. 7). Each of the arcuate pieces 124...
The notch 129 of the tightening band 126 arranged above is engaged, and when tightening, the tightening band 126 is attached to the mounting body 11.
2 can be tightened without rotating.

The convergence device 110 is constructed as described above, and
2. The mounting body 112 is fitted into the
By tightening 0, the band member 128 is reduced in diameter and temporarily tightened to temporarily fix the mounting body 112 on the neck portion 102. The four-pole and six-pole static magnets 114 to 1 adjust red and blue emission at both ends of the three electron guns.
17 and the purity magnets 118 and 119 for controlling the emission of red, green and blue colors, respectively.
The fixing rings 123 are tightened and fixed. After that, the convergence device 110 is fixed on the neck portion 102 of the CRT 100 by fully tightening the tightening screw 130 of the tightening band 126.

[0009]

The above-described tightening band 126 is temporarily tightened, and then, a screw capable of adjusting the tightening force is used for final tightening.
Numeral 8 is a simple flat plate, and the tension is not sufficiently uniform due to friction of the plurality of arc pieces 124. If the tightening force varies in this way,
When the static magnets 114 to 117 and the purity magnets 118 and 119 are respectively adjusted, the mounting main body 112 is displaced. Furthermore, the tightening force at the time of final tightening will vary. On the other hand, the notch 129 of the band member 128 is engaged with the projection 113a of the mounting body 112 and is prevented from rotating, and the tightening force is partially concentrated at the position of the notch 129.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a tightening band capable of uniformly tightening.

[0011]

The present invention has the following arrangement to achieve the above object. In other words, a metal band member is formed in a ring shape, and both ends are formed in erecting pieces that stand out of the ring, and a diameter of the band member can be reduced by a tightening screw that penetrates each erecting piece. Form a ridge that protrudes outward and extends in the circumferential direction on the peripheral surface, and is positioned at the circumferential center of the band member.
A notch is formed . Moreover, while forming the notch for positioning in the side edge part of a band member ,
The ridges may be arranged at equal positions from both side edges in the width direction of the band member. In addition, the band
May be formed in parallel to the circumferential direction of the band member, and the respective ridges may be arranged evenly in the width direction of the band member along both side edges of the band member .

[0012]

Next, the operation will be described. Since the circumferential surface of the band member has a convex in the circumferential direction, the rigidity of the band member can be increased. When the diameter of the tightening band is reduced by tightening the tightening band, a tightening force acts in the circumferential direction and is uniformly transmitted in the circumferential direction, so that partial concentration does not occur and uniform tightening can be performed as a whole. Further, since the positioning notch is formed at the center in the circumferential direction of the band member, the concentrated tightening force can be evenly distributed to the left and right of the notch.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the same components as those described in the above conventional example will be described with the same reference numerals.
FIG. 1 is a development view of a tightening band according to the present invention.

As shown in the developed view of FIG. 1, the length of the band member 12 of the tightening band 10 is L. Standing pieces 14a and 14b are formed on both ends of the band member 12 (see FIG. 2). The standing pieces 14a, 14
The band member 12 other than b is the main body portion M. In addition, holes are formed in the standing pieces 14a and 14b. In addition, a female screw is engraved in the hole of the one standing piece 14a.
The main body portion M of the band member 12 is formed in a ring shape, and a tightening screw 18 penetrates the upright pieces 14a and 14b from the upright piece 14b side, and is screwed into a female screw in a hole of the upright piece 14a (FIG. 3).

On the other hand, a notch 12a is formed at the center of one side edge of the band member 12 in the width direction. That is, the notch 12a is formed at the center in the circumferential direction of the main body M. The notch 12a engages with the projection 113a of the mounting body 112 and is positioned so that the tightening band 10 does not rotate during tightening.

The main body portion M of the band member 12 has a ridge. In this protruding strip, protruding strips 20a, 20a are formed in the non-notched section 12a, and a protruding strip 20b is also formed in the band member 12 of the notch 12a. Ridge 20
a is formed at the center of the band member 12 in the width direction. The protruding ridge 20b is formed at the center of the width N of the notch 12a of the band member 12.

Next, a case where the convergence device 110 is fixed by using the above-mentioned tightening band 10 will be described. The fastening band 10 is arranged on the mounting portion 112A of the mounting main body 112 constituting the convergence device 110. Then, the convergence device 110 is fitted to the neck portion 102 of the cathode ray tube 100, and the tightening screw 18 is tightened at a predetermined position to temporarily tighten the tightening band 10 as described above. Adjust the static magnets 114 to 117 and the purity magnets 118 and 119 respectively,
Tighten the fixing ring 123 to fix each magnet.
Furthermore, the convergence device 110 is fixed to the neck portion 112 by tightening the tightening band 10 and fully tightening.

The fastening band 10 is attached to the mounting body 112.
The notch 12a of the tightening band 10 is fitted to the convex portion 113a of the fixing band 112, and the tightening band 10 is disposed on the fixing portion 112B. Therefore, the notch 12a of the tightening band 10
Since the distance P to the upright pieces 14a and 14b in the main body portion M is the same after the boundary, the tightening force can be equally distributed and the degree of tightening can be equalized. Also, ridges 20a, 20a, 2
0b, the rigidity of the band member 12 increases, and the main body M
A tightening force acts on the whole, and a uniform tightening force can be realized.

In the above embodiment, each ridge 20a, 20
a and 20b may be integrally connected. The ridge 20b is located at the center of the width N of the notch 12a of the band member 12. In this case, when the tightening band 10 is tightened, the band member 1
2, the tightening force is evenly distributed in the width direction.

On the other hand, in the above embodiment, the ridges 20a,
20a and 20b may be divided into a plurality of shorter ones.

The ridge may be a plurality of ridges extending parallel to the circumferential direction. In the embodiment shown in FIGS. 4 and 5 as an example, two ridges 21 are formed over substantially the entire circumference. The ridges 21 are a series of convex without being divided in the middle, along the width direction of the side edges of the band member 12, are disposed uniformly formed with respect to the width direction of the band member. In this embodiment, it is possible to increase the rigidity of the band member 12 and to disperse the tightening force on the tightened portion (on the mounting portion 112A) in the width direction of the band member 12 by providing two ridges 21. And uniform tightening is possible.

The number of the ridges may be three or more. In this case, it is preferable to arrange the ridges evenly along the side edges of the band member and in the width direction of the band member.

FIG. 6 shows the ridge 2 located at the notch 12a of the band portion 12 in the embodiment of FIGS.
1 and 21 are integrated.

In the above embodiments, the back surface of the ridge is concave, but the back surface may be flat. As described above, various preferred embodiments of the present invention have been described.
The present invention is not limited to the above-described embodiments, and can be used not only for fixing the convergence device but also for tightening hoses and the like, and of course, many modifications can be made without departing from the spirit of the invention. It is.

[0025]

The tightening band according to the present invention is constructed as described above, and has a ridge that protrudes outward and extends circumferentially on the band member of the tightening band.
The rigidity of the band member can be increased, and the tightening force can be uniformly applied to the entire band when tightened.
Further, a notch is formed at the center in the circumferential direction of the band member, the distance from the notch to the upright piece is equal, and the tightening force is not dispersed and concentrated on both sides. further,
By arranging a plurality of ridges in the width direction of the band member,
The tightening force applied to the tightened part can be dispersed,
It has a remarkable effect such as enabling more uniform tightening.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a tightening band according to the present invention is developed.

FIG. 2 is a side view of a state in which upstanding pieces at both ends of a band member are cut and raised.

FIG. 3 is a side view of the tightening band according to the present invention.

FIG. 4 is a perspective view of another embodiment of the tightening band according to the present invention.

FIG. 5 is a development view of a band member of the tightening band of FIG. 4;

FIG. 6 is a development view of a band member according to another embodiment of the tightening band according to the present invention.

FIG. 7 shows a side view of the mounting body.

FIG. 8 is an explanatory diagram showing a structure of a cathode ray tube.

FIG. 9 is an exploded perspective view of a conventional convergence device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tightening band 12 Band member 12a Notch 14a Standing piece 14b Standing piece 18 Tightening screw

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kora Nishizawa 1-9-2 Hara-cho, Fukaya-shi, Saitama Prefecture Toshiba Corporation Fukaya Electronics Factory (56) References Japanese Utility Model No. 4-77088 (JP, U) Opened 56-157490 (JP, U) Opened 59-105765 (JP, U) Opened 49-133217 (JP, U) Opened 53-127822 (JP, U) (58) Int.Cl. ⁷ , DB name) H01J 29/54 F16L 33/02

Claims (3)

(57) [Claims] 1. A tightening band in which a metal band member is formed in a ring shape, and both ends are formed in upright pieces that stand outside the ring, and can be reduced in diameter by a tightening screw penetrating each upright piece. On the peripheral surface of the band member, a ridge protruding outward and extending in the peripheral direction is formed, and the center of the band member in the peripheral direction is formed.
A fastening band, wherein a notch for positioning is formed in a portion . 2. The band member according to claim 1, wherein a notch for positioning is formed in a side edge of the band member, and the ridge is arranged at an equal position from both side edges in a width direction of the band member. Tightening band. 3. A plurality of ridges parallel to the circumferential direction of the band member.
This band is formed, and the ridges near each side edge are aligned with the side edge of the band member.
Are arranged evenly in the width direction of the
3. The tightening band according to claim 1, wherein