JPS6039993Y2 - Holding device for cathode ray tube board in television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding device for a cathode ray tube board that is attached to the tip of the neck of a cathode ray tube in a television receiver.

Conventionally, when attaching a cathode ray tube board to the neck of a cathode ray tube, a contact part of a socket attached to the board is attached to a small diameter connecting pin protruding in the axial direction of the cathode ray tube at the tip of the neck of the cathode ray tube. Generally, it is installed by simply mating.

By the way, when a television receiver is used in a place where it is subject to constant vibration, and sometimes severe vibration, such as inside an airplane, there is a The cathode ray tube substrate attached via the connection pins as described above is violently vibrated in a direction perpendicular to the axial direction.

As a result, there is a risk that the cathode ray tube substrate, which is simply fitted and attached to the small-diameter connecting pin, may fall off the connecting pin due to the vibration.

Further, the above-mentioned connecting pin is attached to the tip of the neck portion with a structure as shown in FIG. 1 for reasons such as the need to maintain a sealed state inside the cathode ray tube.

That is, the cathode ray tube 1 is configured in a through hole 6 provided in the tip wall 5 of the neck portion 4 of the cathode ray tube 1, which is a portion where the lead portion 2 from the electrode in the cathode ray tube 1 and the connecting pin 3 are connected. A conductive connection auxiliary member 7 having the same expansion coefficient as the glass material is tightly fitted.

Through the auxiliary member 7, the lead portion 2 facing into the through hole 6 from the inner side and the outer side of the cathode ray tube 1 and the connecting pin 3 are electrically connected to each other.

In this way, by disposing the connection auxiliary member 7 having the same expansion coefficient as the material of the cathode ray tube 1 in the through hole 6, even if the cathode ray tube 1 expands due to high heat, the through hole 7
The airtight condition is ensured.

Further, in this case, the material of the connecting pin 3 can be a metal such as iron, which takes mechanical strength into consideration, without considering the material of the cathode ray tube 1.

However, in such a configuration, the connecting pin 3 is attached with its base end 3a only slightly fitting into the through hole 7, so that sufficient connection strength cannot be obtained.

Therefore, when a television receiver is used in a place where vibrations are constantly applied as mentioned above, the cathode ray tube socket does not even have to be removed from the connection pin, but the connection pin is removed from the neck along with the socket. Put it away.

Alternatively, electrical continuity with the connection auxiliary member may no longer be established.

Therefore, in order to prevent accidents such as falling off the connection pin of the CRT socket, falling off the connection pin from the neck part, or electrical disconnection of the connection pin, as mentioned above, the CRT socket is installed at the base end of the CRT socket. A method has been devised in which the socket is held on the neck of the cathode ray tube by hanging a string across the printed circuit board and the neck of the cathode ray tube, or a string with a spring interposed in the middle to absorb vibrations. Ta.

However, this method has the disadvantage that the workability of strapping is poor and sufficient holding force cannot be obtained.

Therefore, the present invention proposes that even if a television receiver is placed in a place where vibrations are constantly applied, such as inside an airplane,
A CRT board holding device that completely prevents accidents that could not be avoided with conventional structures, such as the above-mentioned cathode ray tube socket or the cathode ray tube board to which this socket is attached, falling off, or the connection pin of the socket falling off, has been developed. This is what we are trying to provide.

Hereinafter, the present invention will be described with reference to specific embodiments shown in the drawings.

2 to 5 show a cathode ray tube substrate holder 11 according to the present invention.

This holder 11 is made of a synthetic resin having rigidity, and is formed into a substantially cylindrical shape with an example of a notch opening 11a.

The holder 11 has a substantially cylindrical main body part 12 in the center thereof, and this main body part 12 is connected to the cathode ray tube by fitting into a connecting pin protruding from the end wall of the neck of the cathode ray tube in the axial direction of the tube. It fits into the socket so as to cover the outer periphery of the cathode ray tube socket to be attached.

One end surface 13 of the main body portion 12 is cut at right angles to the axial direction, and is formed to be orthogonal to and in close contact with the surface of the cathode ray tube substrate to which the cathode ray tube socket is attached via the base end.

Further, from the one end surface 13 side, there are a plurality of protrusions 14, five in the illustrated example, which are inserted into a through hole formed in the substrate or the socket and serve as means for fixing to the substrate. It is installed protrudingly.

Further, on the other end side of the main body part 12 opposite to the one end side where the protruding piece 14 is formed, a tube is fitted around the outer periphery of the neck part of the cathode ray tube to which the cathode ray tube socket is attached, and is adapted to tighten the neck part. A holding portion 15 is formed.

This holding part 15 includes several pieces from the other end side of the holding main body part 12,
In the illustrated example, it is constructed by extending three holding pieces 16, and these holding pieces 16 are slightly elastically biased toward each other in the inner circumferential direction.

These holding pieces 16 are configured to tighten the neck portion of the cathode ray tube when fitted around the outer periphery of the neck portion.

That is, the holding portion 15 has a plurality of holding pieces 16 formed by drilling an axial slot in the other end side of the substantially cylindrical main body portion 12 having the same diameter as the diameter of the neck portion or a slightly smaller diameter. By doing so, it becomes elastically deflectable and tightly fits around the outer periphery of the neck portion, thereby acting to tighten the neck portion.

A cathode ray tube board that is held by the holder 11 formed in this manner through a socket that is fitted into a connecting pin protruding from the neck of the cathode ray tube will be described with reference to the illustrated example.

First, as shown in FIG. 6, the protruding piece 14 is inserted and fitted into the through hole 24 made in the printed circuit board 23, which is a cathode ray tube board attached to the proximal end side of the cathode ray tube socket 21 via the terminal 22. and attach the holder 11.

Then, since one end surface 13 of the holder 11 is cut perpendicularly to the axial direction, the holder 11 is mounted perpendicularly to the printed circuit board 23.

Further, by drilling the through hole 24 around the outer circumference of the socket 21 on the same circumference coaxial with the axis of the socket 21, the holder 11 is attached coaxially with the socket 21.

At this time, one end 1 of the projecting piece 14 facing from the through hole 24 of the substrate 23 so that the holder 11 is fixed to the substrate 23.
4a is crushed by heat as shown in FIG. 7 and welded to the substrate 23.

Since this protruding piece 14 is a means for fixing the holding body 11 to the substrate 23, a hook-shaped protrusion 14b is provided at the tip as shown in FIG. 8 to prevent it from being pulled out. There may be.

The cathode ray tube socket 2 with the holder 11 fixed in this way
1 is fitted through the contact portion 25 of the socket 21 into the connecting pin 3 which projects from the tip wall 5 of the neck portion 4 of the cathode ray tube 1 in the tube axis direction.

Then, the holding part 15 of the holding body 11 fits around the outer periphery of the neck part 4 as shown in FIG.
Hold it tightly.

Here, a tightening band 26 is further wound around the outer periphery of the holding part 15 fitted to the neck part 4, and the neck part 4 is made into a wire.

In this way, the fitting portion between the cathode ray tube socket 21 and the connecting pin 3 of the neck portion 4 of the cathode ray tube 1 has one end fixed to the socket 21 and extends from the socket 21 to the neck portion 4. It is held by a holding body 11.

Therefore, even if vibration is applied to the fitting portion, both the cathode ray tube socket 21 and the neck portion 4 will vibrate and no relative displacement will occur.

Therefore, the printed circuit board 23 will not come off the neck portion 4 and fall.

Furthermore, the connection pin 3 will not fall off or break while it is still fitted into the cathode ray tube socket 21 due to vibration, or electrical continuity will not be established.

In the above example, one side of the holder 11 is formed into an opening 11a in consideration of the shape and arrangement of the components arranged on the printed circuit board 23, but it is preferable that the holder 11 has a cylindrical shape without an opening. It is also good in terms of strength to do so.

As mentioned above, by using the holding device according to the present invention, the television receiver can be safely used in places where there is constant vibration, such as in aircraft and vehicles.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing a connecting pin portion in the neck portion of a cathode ray tube. 2 to 5 show the holder constituting the present invention; FIG. 2 is a perspective view, FIG. 3 is a side view, and FIG. 4 is a sectional view taken along line A-A in FIG. FIG. 5 is a sectional view taken along line B-B in FIG. 3. FIG. 6 is a side sectional view showing the state in which the cathode ray tube board is attached using the device of the present invention, FIG. 7 is a sectional view showing the state in which the protrusion of the holder is fixed to the printed circuit board, and FIG. 8 is the other It is a sectional view showing an example. FIG. 9 is a side view of the cathode ray tube substrate and the neck of the cathode ray tube being held using the holder. 3... Connection pin, 4... Neck of cathode ray tube, 1
DESCRIPTION OF SYMBOLS 1... Holding body, 12... Main body part of holding body, 14...
・Protruding piece, 15... Holding part, 16... Holding piece, 21.
...Cathode-ray tube socket, 23...Printed circuit board.

Claims (1)

[Scope of utility model registration request] The printed circuit board to which the socket is attached is attached to the cathode ray tube by fitting the cathode ray tube socket onto a connecting pin protruding from the neck of the cathode ray tube of the television receiver, and the outer periphery of the socket is covered; The socket is held by a holder having means for fixing to the printed circuit board on one end side and a holding part on the other end that fits around the outer periphery of the neck part and tightens the neck part. A holding device for a cathode ray tube board in a television receiver.