JPH01302896A - circuit block fixing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a circuit block fixing device for fixing a circuit block such as a power supply block in an electronic device such as a television set to a cabinet.

2. Description of the Related Art Generally, electronic equipment can be electrically separated into a plurality of circuit blocks, and a circuit is configured for each circuit block on a printed circuit board, which is then fixed to a cabinet. For example, the configuration of various display devices includes a cabinet, a cathode ray tube (hereinafter abbreviated as CRT), a deflection coil, and a CRT.
The main printed board block that supplies current to the CRT printed circuit board, the main printed board block that makes up the vertical circuit, the interface block that processes external signals, and the power supply block that converts external voltage and supplies it internally. , each block is connected using lead wires and connectors. The external shape of display devices is becoming more compact, and the gaps between the blocks are becoming smaller, making it more difficult to connect and fix the blocks. The connection and installation of a conventional power supply block will be explained below with reference to the drawings.

FIG. 9 is a plan view of a main part of a conventional display device, and FIG. 10 is a side view of the same. Front frame 1. The CRT 2 is fixedly attached to a front cabinet (not shown), and a deflection coil 3 is attached to the CRT 2, and a bottom plate 5 is attached to the front frame 1 of the CRT printed board block 4 with a plurality of fixing screws 6. The power supply block 7 has a structure in which a finished printed board 8 constituting the TL source circuit is attached to the front opening side of a substantially U-shaped case 9 with screws 10, and the back side of this case 9 has screws 10. A completed interface printed board 12 is inserted and fixed by the locking support 11.

The completed interface printed board 12 is provided with connector stands 13 and 14 for connection, and connectors 15 and 15 with lead wires from other blocks. j6 is inserted and connected in the direction of the two arrows, and the completed interface board 12 and other blocks, and in turn, the power supply block 7 and other blocks are connected.

At this time, the connection work is carried out with the power supply block 7 placed outside the bottom plate 6. After that, the mounting hole 17 of the bottom plate 6
Align the mounting hole 18 of the power supply case 9 with the mounting hole 18 of the power supply case 9, and fix the mounting with screws or the like. After that, there is a further step of shaping the lead wire.

The above series of work will be performed on the power supply blocks γ and C when the installation is completed.
The gap between the RT2 and the deflection coil 3 is small, and it is difficult to work by inserting your hands into this gap, so the construction method described above has been used.

Problem to be Solved by the Invention However, in the above-mentioned process, in order to secure a working space, the work is proceeded with the power supply block 7 temporarily placed outside the bottom plate 5, and then the power supply block 7 is fixed on the bottom plate. I'm here.

It takes a second time to install the power supply block 7, and the connector with lead wires from other blocks 16.18
The length of the lead wire was required to be long. Further, the lead shaping work after attaching and fixing the power supply block 7 also required a large number of man-hours.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a single circuit block fixing device that facilitates connection work and lead shaping work.

Means for Solving the Problems In order to achieve the above objects, the circuit block fixing device of the present invention provides a circuit that detachably supports a case to which a printed circuit board is attached in a form tilted outward from the plane of the cabinet bottom plate. The feature is that the block support part is provided on the periphery of the bottom plate.

Effect: With the above configuration, the circuit blocks placed on the peripheral edge of the cabinet bottom plate to which a plurality of circuit blocks are attached can be temporarily fixed to the support part in a form tilted outward from the plane of the bottom plate, and as a result, other The work space for fixing the circuit block to the bottom plate and connecting the lead wires can be secured, and the lead wires connecting the circuit block temporarily fixed to the support and other circuit blocks are relatively short and easy to connect. It becomes possible.

Embodiment 1 A power supply block fixing device according to an embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a main part of the display device, FIG. 2 is a plan view of a power supply block, and FIG. 3 is a side view of the same. In the figure, 20 is a front frame, and 21 is a CRT, which is fixed to a front cabinet (not shown).

This CRT 21 has a deflection coil 22. On the other hand, the CRT glint board is fixed with 23 blocks.

The front frame 20 has a bottom plate 24. The rear cabinet 26 is fixed with screws 26 and 27, respectively.

Power supply printed board finished product 28. The completed interface printed board 29 is fixed to the power supply case 30 with screws 31 and locking supports 32. Printed board finished product 28. A power supply block 33 consisting of a power supply case 30 is attached to the bottom plate 24 with four screws 34. Connector 35 with lead wire from other block
．． 36 are inserted and connected to connector bases 37 and 38, respectively.

Next, the configuration of the power supply block of this embodiment will be explained using FIGS. 4 to 8. FIG. 4 is a perspective view of the fixing device showing the assembled configuration of the power supply block and the bottom plate, and FIG. 6 is a sectional view of the Mu person in FIG. 4. FIGS. 6 to 8 are side views for explaining the attachment structure of the power supply block to the bottom plate.

The power supply case 30 has an approximately U-shaped cross section,
Completed power supply printed board 2 to cover the front opening.
8 is fixed with a screw 31. This power supply case 30, which is made of a flat plate bent into a substantially U-shape, has flanges 30a extending outward from both front ends of the side plate portion, and flanges 30b extending outward from both lower ends. . Each flange 30a is provided with a cutout 39,39 at a predetermined distance from its lower end.

On the other hand, the side wall 242L of the bottom plate 24 is provided with cut-and-raised portions 40, 40 at locations separated from each other corresponding to the distance between the notches 39 and 39 provided in the power supply case 3o. These cut and raised portions 40 and 40 are inserted into the notches 39 and 39, and the 71E source block 33 is temporarily fixed to the bottom plate 24.

The structure for this temporary fixing will be explained in more detail using FIG. 8. That is, in the cut and raised portion 4o of the bottom plate 24,
A stopper portion 44 extending from the lower end of each end thereof.
is provided, and two grooves 4 are provided at the upper end 42.
6 and a protrusion 45'. Therefore, these stopper portions 44 and groove portions 46 . The protrusion 46' is in a form in which the cut-and-raised part 4o is inserted into the cut-out part 39.

7 located above and below the notches 39, 39 of the power supply case 30
The peripheral portions 41, 43 of the flange 301L can be engaged with each other. More specifically, by engaging the stopper portion 44 and the lower peripheral edge portion 43 of the cutout portion 39 of the flange 3Qa,
On the other hand, by engaging one of the grooves 46 or the protrusions 46' with the upper peripheral edge portion 41 of the notch 39 of the flange 301L, the power supply block 33 is supported in a form tilted outward with respect to the bottom plate 24. It becomes possible to do so.

The inclination in this supported state is that of the groove 46 and the protrusion 46'.
This can be changed depending on which part of the upper peripheral edge portion 41 is engaged. Note that some of these stoppers 44. The groove 46 and the protrusion 46' are connected to the power supply block 33.
Considering the weight of the power supply case 30 and the wall thickness of the power supply case 30,
It is necessary to consider the shape and formation position so that the power supply block 33 does not easily fall off or fall in the temporarily fixed state.

Now, with the above-described configuration, the power supply block 33 can be temporarily fixed to the bottom plate 24 with most of it projecting outward from the flat area of the bottom plate 24. Therefore, in the process of assembling the display device shown in FIGS. 1 to 3, first, the power supply block 33 is placed on the bottom plate 24 to which the front frame 20 and CRT 21 are attached, with the power supply block 33 tilted at an angle of approximately 45 degrees as shown in FIG. Temporarily fasten. Next, while maintaining this position, the connector stand 37 of the completed interface printed board 29 fixed to the power supply block 33.
Connectors 35 and 36 with lead wires for power connection derived from the CRT printed board block or main glint board block are connected to 38. When the connections of all the lead wire connectors are completed, the engagement between the bottom plate 24 and the power supply case 30 is released, and the power supply case 30 is
is installed perpendicular to the bottom plate 24 as shown in FIG.

After that, the power supply block 33 is completely fixed to the bottom plate 24 by positioning and screwing.

By temporarily fixing the power supply block 3o to the bottom plate 24 with the power supply block 3o tilted outward from the bottom plate 24, most of the power supply block 30 is located outside the surface area of the bottom plate 24, and other circuit blocks are While forming a space for installation or connection, on the other hand, a connector base portion for electrically connecting the power supply block 30 and other circuit blocks is located on the bottom plate 24, and a lead wire connecting them is placed on the bottom plate 24. It becomes possible to combine even if the length of is relatively short. As a result, the work efficiency of wiring (lead wire) shaping work and circuit block installation work in the display device assembly process is improved.

It becomes possible to improve productivity.

Effects of the Invention According to the present invention, the circuit blocks to be arranged and fixed on the periphery of the cabinet bottom plate are engaged with the circuit block support portion and temporarily fixed, thereby temporarily fixing the circuit blocks arranged at high density. Secure the work space required for connecting connectors with lead wires, lead shaping work, etc. between the circuit blocks and other circuit blocks, and also keep the length of lead wires connecting these circuit blocks to the minimum required length. With this, you can connect the temporarily fixed circuit block to other circuit blocks. As a result, in the assembly process of electronic devices where the outer casing is downsized and high-density packaging is performed, it is possible to efficiently secure work space and improve workability, thereby increasing productivity.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main parts of a display device according to an embodiment of the present invention, Fig. 2 is a plan view of a power supply block of the display device, Fig. 3 is a side view of the same, and Fig. 4 is a power supply block of the present invention. FIG. 6 is a perspective view showing the structure of the fixing device, and FIG. 6 is a sectional view of FIG. 6 to 8 are side views for explaining the mounting structure of the power supply block fixing device, FIG. 9 is a plan view of a main part of a conventional display device, and FIG. 10 is a side view of the same. 33... Power supply block, 24... Bottom plate, 39... Cutting hole portion, 40... Cutting and raising portion, 44... Stopper one Department. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 6 Figure 7 Figure 9 Figure 10

Claims (1)

[Claims] A circuit block support part is provided at the peripheral edge of the bottom plate to removably support a case to which a printed circuit board on which relatively heavy electrical components is mounted is tilted outward from the plane of the cabinet bottom plate. A circuit block fixing device characterized by: