JPH088018A - Neck board coming-out stopping mechanism of cathode ray tube - Google Patents

Abstract

PURPOSE:To lock a projection of a neck part in a locking hole of a plate spring supporting the outer circumference of the neck part by spring action and installed in a socket into which an electrode terminal of the neck part is inserted for connection and a neck board is fixed in good workability. CONSTITUTION:A neck part 1 of a cathode ray tube has an electrode terminal 9 and a projection 11 on a glass surface, and two plate springs 12, in each of which a locking hole 13 is formed, are fixed in parallel in a socket 2 of a neck board 3. When the socket 2 is inserted into the terminal, the spring 12 slides the outer circumference of the neck part 1 in the direction of A for supporting by spring action, and the locking hole 13 locks the projection 11 in an insertion completing position. A tapered part of the projection 11 guides the tip of the spring 12 so as to open against elasticity and complete locking without striking. When locking is unlocked, the spring 12 is manually opened to draw out the socket. The neck board 3 is capable of mounting and demounting by one operation, structure is simplified, job is made easy, and cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a cathode ray tube, and more particularly to a mechanism for preventing a substrate attached to the neck portion of the cathode ray tube from coming off.

Cathode ray tubes have become indispensable as display devices in information processing. In recent years, cathode ray tubes have been progressing toward higher resolution and lower cost, and the neck substrate attached to the socket that makes contact with the electrode terminals protruding from the end of the neck portion of the cathode ray tube has become larger and heavier due to one sheet. Tend to. Further, the neck substrate is a source of interference radio waves, and it is necessary to wrap the neck substrate with a shielding member and reduce the opening as much as possible in order to prevent the emission of interference radio waves as the resolution of an image becomes higher in recent years.

Further, in the cathode ray tube for information processing, the neck substrate for the cathode ray tube is detached and inspected for maintenance at the user's place. Therefore, the following techniques have been conventionally used.

[0004]

2. Description of the Related Art A conventional retaining mechanism for a cathode ray tube neck substrate will be described with reference to the drawings. In addition, in order to make the description of the configuration and operation easy to understand, the same reference numerals are given to the same portions throughout the drawings, and the duplicated description thereof will be omitted.

FIG. 3 shows a mechanism of a conventional fixing means using an adhesive. In the figure, 1 is the neck portion of the cathode ray tube, 2
Is a socket having a built-in connector for contact-connecting with an electrode terminal (not shown) of the cathode ray tube, and 3 is a neck substrate fixed to the socket 2, on which many circuit components connected to the electrode terminals of the cathode ray tube are mounted. . 4 is an adhesive and the neck part 1
The end portion on the side and the contact portion on the side of the socket 2 are fixed by the adhesive force of the adhesive to prevent the neck substrate 3 from coming off.

FIG. 4 shows a mechanism of a conventional fixing means using a mold member. In the figure, reference numeral 5 is a holding plate, and a mold member or the like is formed in a brim shape or a band shape having a tightening mechanism, and the neck portion 1 of the cathode ray tube is gripped and fixed by using frictional force. . Reference numeral 6 is a mounting rod for connection, which is provided with a screw at its end to screw the holding plate 5 and the neck substrate 3 so that they can be screwed, and the friction force of the holding plate 5 prevents the neck substrate 3 from coming off. .

FIG. 5 shows a mechanism of a conventional fixing means using an elastic member. In the figure, 7 is a cover of an electronic device including a cathode ray tube, 8 is an elastic member (for example, sponge, etc.), which is inserted into the gap between the neck substrate 3 and the cover 7 which are connected to the electrode terminals by the socket 2, and The repulsive force due to the pressure is used to prevent the neck substrate 3 from coming off.

[0008]

In the fixing method using the silicone adhesive shown in FIG. 3, the reliability of the retainer as a retaining member becomes low when the neck substrate 3 becomes heavy due to the adhesion. Further, there is a problem that the silicone adhesive is peeled off at the time of maintenance, and is re-bonded at the end of maintenance.

In the method of preventing slipping off by frictional force through the mold member shown in FIG. 4, the frictional force of the tightened portion with respect to the neck portion 1 changes depending on the temperature condition of the neck portion 1, so that it deteriorates with time and becomes heavy. In the case of the neck substrate 3, there is a problem that the neck substrate 3 is displaced or easily detached when the device is transported.

Further, in the method of pressing the neck substrate 3 by utilizing the repulsive force of the elastic member 8 attached to the molded cover 7 of FIG. 5, it is said that the neck substrate 3 comes off due to deterioration of the elastic member 8 with time. There was a problem.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a neck substrate retaining mechanism capable of reliably attaching the neck substrate to the neck portion of the cathode ray tube with good workability.

[0012]

As shown in FIG. 1, the present invention comprises a socket 2 inserted and connected to an electrode terminal 9 of a neck portion 1 of a cathode ray tube, and a neck substrate 3 fixed to the socket 2. In a neck substrate slip-out prevention mechanism for a cathode ray tube, a plurality of leaf springs 12 fixed to the socket 2 and sandwiching the outer circumference of the neck portion 1 with springiness in the connecting direction and the neck portion 1 are formed. In the meantime, detachable retaining means for engaging with the concave and convex portions after the connection is provided.

[0013]

In the insertion / connection completion position of the socket 2 with respect to the electrode terminal 9, for example, the locking holes 13 corresponding to the recesses provided in the two leaf springs 12 and the protrusions corresponding to the protrusions provided in the neck portion 1 are formed. The neck substrate 3 fixed to the socket 2 can be prevented from coming off from the electrode terminal 9 of the neck portion 1 of the cathode ray tube because the 11 is locked by utilizing the elasticity in the holding direction.

The effect remains the same even if the relative positional relationship between the concave portion and the convex portion is reversed. Further, when the socket 2 is pulled out from the electrode terminal 9, it can be easily pulled out by opening the elastic force biased in the clamping direction of the spring plate 12 with respect to the neck portion 1 by an external force such as manual operation. The locking means does not release the locked state unless an external force acts on the two leaf springs, so that the conventional problems can be solved.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a plan view and a side view of a neck substrate retaining mechanism according to the present invention. The left side shows a state where the neck substrate is removed, and the right side shows a state where the neck substrate is attached. In the figure,
Reference numeral 9 denotes an electrode terminal projecting at the end of the neck portion 1 of the cathode ray tube,
Reference numeral 11 is a protrusion corresponding to a protrusion provided on the glass surface of the neck portion 1.

Reference numeral 12 denotes two parallel leaf springs fixedly mounted on the socket 2. The leaf spring 12 is integrally molded with the periphery of the socket 2 by a metal plate or the like, and the socket 2 is inserted into the electrode terminal 9. At the same time, the outer periphery of the neck portion 1 slides in the insertion direction A of the socket 2 to clamp the neck portion 1 by the spring force.

Reference numeral 13 is a locking hole corresponding to a recess provided in the leaf spring 12, and is provided at a position to lock with the protrusion 11 when the socket 2 completes the insertion connection with the electrode terminal 9. Has been.

When the socket 2 is inserted and connected to the electrode terminal 9, the tip of the leaf spring 12 approaches the projection 11 while sliding in the insertion direction A of the socket 2 along the outer periphery of the neck 1. , The protrusion 11 is provided with a tapered portion to avoid a collision, and the tapered portion guides the tapered portion to open in opposition to the elasticity in the clamping direction and advances in the direction of the arrow A, so that the relative positions of the protrusion 11 and the locking hole 13 match. When it is done, it becomes the engagement state as shown in the left figure.

In the engaged position, the arrow A of the leaf spring 12
The edge in the direction orthogonal to the direction has a gap with respect to the curved neck portion 1. When the locking is released, the socket 2 may be pulled out from the electrode terminal 9 while using this gap to open the leaf spring 12 by an external force such as manual operation. This locking means
As long as the external force does not act in the direction of expanding the two leaf springs, the locked state will not be released, and the conventional problems can be solved.

FIG. 2 shows a plan view and a side view of another embodiment of the present invention, in which the left side shows the neck substrate removed state and the right side shows the neck substrate attached state. 2 is different from FIG. 1 in that the concave portion and the convex portion provided for locking the leaf spring 12 and the neck portion 1, respectively, are reversed.

In the figure, 14 is a recess provided in the neck portion 1 and may have a groove shape as shown. 15 is a leaf spring
It is a locking projection corresponding to the convex portion provided on 12, and when the socket 2 completes the insertion connection to the electrode terminal 9,
It is provided at a position where the recess 14 is locked. The operation of locking and unlocking is the same as in the case of FIG. 1, and therefore its explanation is omitted.

The two parallel leaf springs can be composed of three or more leaf springs, and may have a curved shape other than the position where the engaging means for protrusions and depressions are provided. It may be a means for bending, and this bent portion is locked with a concave portion or a convex portion provided in the neck portion 1.

[0023]

As described above, according to the neck substrate slip-off preventing mechanism of the cathode ray tube of the present invention, the neck substrate can be attached / detached with one touch, so that the number of steps such as applying an adhesive can be reduced, and the time of maintenance can be reduced. Work becomes easier. Further, since it has a simple structure, it has an effect of reducing the cost, and further, the leaf spring that holds the neck substrate has an effect of suppressing the interference radio wave radiation.

[Brief description of drawings]

FIG. 1 is a plan view and a side view of a neck substrate retaining mechanism of the present invention.

FIG. 2 is a plan view and a side view of another embodiment of the present invention.

FIG. 3 is a mechanism diagram of a conventional fixing means using an adhesive.

FIG. 4 is a mechanism diagram of a conventional fixing means using a mold member.

FIG. 5 is a mechanism diagram of a conventional fixing means using an elastic member.

[Explanation of symbols]

 1 Neck part 2 Socket 3 Neck substrate 11 Protrusion part 12 Leaf spring 13 Locking hole 14 Recessed part 15 Locking protrusion

Claims (1)

[Claims] 1. A neck substrate slip-off preventing mechanism for a cathode ray tube, comprising: a socket that is inserted and connected to an electrode terminal of a neck portion of the cathode ray tube; and a neck substrate fixed to the socket. It is characterized in that a detachable retaining means is provided between the plurality of leaf springs for sandwiching the outer periphery of the neck portion in the connecting direction so as to have a spring property and the neck portion and engaging with the recess and protrusion after the connection. Mechanism to prevent the neck substrate from coming off of the cathode ray tube.