JPS584388Y2 - Chassis device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chassis device that supports a printed wiring board of a color television receiver or the like and is housed and installed in a housing.

Most of the chassis devices used in conventional color television receivers are heavy and have a structure in which a metal plate is bent into a box shape and an opening is provided in the flat part.

However, in recent years, with the miniaturization of the components of television receivers and the integration of circuits, a structure has been developed in which the printed wiring board is enlarged and the components are collectively attached to the printed wiring board.

As a result, if the chassis device is also made of metal, it accounts for a very large proportion of its weight, and there is a desire to reduce its weight.

In addition, chassis devices are required to have a function that allows them to be easily inserted into and removed from the outer enclosure for reasons such as repair and inspection of the supported circuit structure, and countermeasures that conflict with this are required. Requires high strength.

This idea was made in order to deal with the above-mentioned circumstances, and the purpose is to provide a chassis device that has efficient reinforcement in terms of strength, is lightweight and compact, and is convenient for repair and inspection of the supporting circuit structure. It is something to do.

An embodiment of this invention will be described in detail below with reference to the drawings.

That is, the chassis device of this invention was conceived as a chassis device for a color television receiver, and its external appearance consists of the front edge 12 and rear edge of a large printed wiring board 11, as shown in FIG. 13 and is inserted integrally with the printed wiring board 11 along the upper surface of the bottom plate of the housing in the direction of arrow X in the figure.

1st. The second chassis bodies 15, 16 each have an essentially oval-shaped side cross section and are made of, for example, synthetic resin.

The means for supporting the printed wiring board 11 by the chassis body 15, 16 is the first. Grooves 17° 18 are set in the second chassis body 15, 16 in the longitudinal direction, and each groove 17.
, 18 respectively sandwich the front edge 12 and rear edge 13 of the printed wiring board 11.

The groove portions 17.18 are integrally formed on the upper sides of the respective upright wing pieces 151, 16□ in each chassis body 15.16, and are opposed to each other.

Furthermore, as a means for securely pinching the edge of the printed wiring board 11,
A plurality of portions are provided as surrounded by broken lines A in FIG.

This part will be explained with reference to FIG. That is, groove part 1
A protruding portion 18□ that protrudes into the groove is formed on one side wall portion 18□ of 8, and a hole 111 formed in the wiring board 11 is fitted into this protruding portion 18□. .

Furthermore, the chassis main body 16 includes relatively heavy parts (for example, a flyback transformer, etc.) on the printed wiring board 11.
A reinforcing portion 20 is integrally molded to prevent the printed wiring board 11 from deforming due to the weight when the printed wiring board 11 is attached.

The state of use of this reinforcing portion 20 (shown in FIG. 1) will be described with reference to FIG. 4.

That is, when the edge 13 of the printed wiring board 11 is inserted into the groove 18 of the second chassis body 16, the reinforcing portion 2
The height 11 of the upper surface of the printed wiring board 11 is set so that the upper surface of the printed wiring board 11 comes into close contact with the lower surface of the printed wiring board 11.

The lower end 21 of this reinforcing portion 20 is connected to the chassis main body 1.
It is set on the same plane as the plane of the support wing 16□ of No. 6, and when placed on the upper surface of the bottom plate as shown in FIG.

A heavy component 23 such as a flyback transformer, for example, is mounted on the upper part of the reinforcing part 20 via the printed wiring board 11, and is attached to the printed wiring board 11 with screws 24, 25 or the like.

Therefore, the planar shape of the reinforcing portion 20 when viewed from the upper surface is shaped according to the lower surface shape of the component placed on the upper surface.
It is.

Further, corresponding to the threaded portions of the mounted parts, threaded portions 26, 27, and 28 (see FIG. 1) are appropriately formed.

Further, holes 29 and 30 for drawing out lead wires, etc. of mounted components are also formed.

Next, in the first chassis body 15, the printed wiring board 1
Means for maintaining the inclined state of the wiring board is configured to facilitate repair and inspection of the circuit, etc. of No. 1.

That is, the means for maintaining the tilted state of the wiring board is constructed in a portion surrounded by a broken line B in FIG.

This part will be explained with reference to FIG.

In the first chassis body 15, the front edge 12 of the printed wiring board 11 is inserted and held in the groove 17 provided along the upper side of the upright wing 15, and is disposed parallel to the bottom plate 14.

In this chassis body, the support wing piece 15□ has
A locking plate 35 is integrally molded so as to extend on the opposite side from the printed wiring board 11, that is, to extend at the tip of the support wing of the chassis body 15 having an L-shaped cross section.

A projecting portion 36 projecting upward is formed at the extended end of the locking plate 35.

Further, between the planes of the upper surface of this locking plate 35 and the upright wing piece 15 opposing thereto, there are reinforcing plates 37, 38 having triangular side surfaces.
．． 39 are integrally formed in parallel.

(The reinforcing plates 38 and 39 are shown in FIG. 1) Furthermore, a rib 40 for setting the inclination angle is integrally formed between the upright wing piece 151 and the support wing piece 15□.

The rib 40 has a base that is integrated with the upright wing piece 15 and the supporting wing piece 152, and a protruding direction that is perpendicular to the longitudinal direction of the first chassis body 15 and a direction that extends from the engagement plate 35.
The supporting wing piece 15 protrudes in a substantially triangular shape.
The shape has a tapered portion 401 with respect to the flat surface of No. 2.

The wiring board tilting state maintaining means constructed in this manner is utilized as follows.

That is, under normal conditions, the support wing 1 is
5□ and the bottom surface of the locking plate 152 are in close contact with the bottom plate 14.

Then, when the first and second chassis bodies 15, 16 and the printed wiring board 11 are integrally moved in the direction of the arrow Y in the figure and pulled out from the housing, the locking plate 35 is attached to the bottom plate 14.
A through hole 14□ is formed at a position corresponding to , as shown in FIG.

This through hole 14□ is formed near the opening of the casing constituted by the bottom plate 14, into which the tip of the locking plate 35 can be inserted.

Therefore, although not shown in the figure, by pulling out the second chassis main body from the opening of the casing in the direction of arrow Y in the figure and inserting the locking plate 35 into the through hole 14, as shown in the figure. Thus, the printed wiring board 11 is set at an opening angle Q with respect to the bottom plate 14, so that the circuit can be easily inspected and repaired from the opening side of the casing.

That is, as shown in FIG. 6, the printed wiring board 11 is inclined at the opening 42 of the housing 41.

Note that the same parts as in FIG. 1 are given the same reference numerals, and the description thereof will be omitted.

Further, the first chassis body 15 is formed symmetrically, and FIG. 1 shows one side.

Furthermore, accessory attachment parts are formed at both ends of the first and second chassis bodies, respectively, and serve both to reinforce the printed wiring board and to attach the heat sink.

This portion is shown representatively surrounded by the broken line C shown in FIG.

The portion surrounded by the broken line C will be explained with reference to FIG.

That is, in FIGS. 7a, l) and c, the end of the groove 17 is set at the end of the chassis body 15, but at the end of this groove 17, there is a A press plate 45 for setting the interval 13 is integrally molded.

Therefore, a portion 46 of a heat sink 46 as shown in FIG. 8 is inserted into the gap 13 so as to slide in the direction of the arrow W shown in the figure.

Then, a screw 47 is inserted through the hole 46□ of the heat sink 46, and the tip of the screw 47 is screwed into the screw hole 48 set in the attachment part, and the screw 47 is inserted into the heat sink 46 and the printed wiring board. 11 and the chassis body 15 are integrated.

When the accessory mounting part is configured in this way, the printed wiring board 11 will be more stable if the heat dissipation plate is bridged between the part surrounded by the broken line C and the part surrounded by the broken line C' shown in FIG. It will be firmly held.

The embodiment of this invention is constructed as described above, and provides a lightweight and strong chassis device, which facilitates the work of integrally inserting and removing components inside and outside the casing.

Furthermore, the chassis body is made of insulating material, allowing the live parts to be lifted from the parts to which the chassis is fixed (bottom plate, cabinet), eliminating the need for the conventionally used insulating plates.

In addition, for the chassis body, it is possible to easily provide lead wire extraction holes for connecting the printed wiring board to other circuits on the upright wing pieces, and in that case, rubber rings for protecting the lead wires etc. can also be omitted.

Particularly, according to this invention, repair and inspection of components and circuits are facilitated by providing a holding means for holding the wiring board in an inclined state with respect to the first chassis body.

Furthermore, since the printing and wiring boards are large, reinforcing parts are provided to solve problems such as deformation and vibration of the board when a flyback transformer, etc. is mounted. .

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing one embodiment of this invention, Fig. 2 is a basic explanatory drawing showing the mounting structure of the printed wiring board, and Fig. 3
The figure is an enlarged cross-sectional view of a part of FIG. 2, and FIG.
A side view showing an example of the use of the reinforcing part, FIG. FIGS. 7a and 7b are perspective views showing the holding means for holding the holder in a tilted state in a state in which it is used; FIGS. C is a plan view, a front view, a side view of the accessory mounting part, and the 8th
The figure is a perspective view showing an example of use of the accessory attachment part. 11...Printed wiring board, 14...Bottom plate,
15.16...First and second chassis bodies, 1
7.18...Groove, 15□, 16□...
・Upright wing piece, 152, 162...Support wing piece, 2
0...Reinforcement part, 23...Heavy part, 3
5...Latching plate, 40...Rib, 40□
...Tapered part.

Claims (1)

[Scope of utility model registration request] The supporting blades are placed in planar contact with the bottom plate, and each of the supporting blades has an upright blade that stands up substantially perpendicularly, and the edge of the printed wiring board is attached to the upper side of the upright wing so as to be substantially parallel to the bottom plate. a chassis body integrally formed of an insulating material so as to have a groove portion for holding the support wing; , a rib adjacent to the locking plate, which is also integrally molded on the chassis body, and having a tapered portion that sets an opening angle toward the upright wing with respect to the extension direction of the locking plate, and together with the bottom plate; The locking plate is opened in the bottom plate near the opening of the casing, and the locking plate is freely inserted and removed, and when the locking plate is inserted, the printed wiring board supported by the chassis body is tilted at an inclination angle with respect to the bottom plate. A chassis device comprising: a through hole that locks the locking plate so as to hold the chassis body so that the tapered portion of the rib faces a plane of the bottom plate.