JPH04225596A - Sub-board fixing device - Google Patents

Abstract

PURPOSE:To fix a sub-board with a main chassis vertically by inserting said sub-board along a vertical groove of a stationary guide rib after a lower lock bar of a lock piece is engaged with the lower jaw of a stationary guide rib and then engaging the upper lock bar of said lock piece with a projected part of the sub-board. CONSTITUTION:A stationary guide rib 7 is formed with a chassis frame 3 in one piece where the stationary guide rib 7 is provided with a vertical groove 7a for sub-board guide and a lower jaw 7b which located at the lower end of this vertical groove 7a and provided with a recessed part. A lower lock bar 8b of a lock piece 8 is engaged with the lower jaw 7b of the stationary guide rib 7. Then, the sub-board 2 is inserted along the vertical groove 7a of the stationary guide rib 7. A recessed part 2b installed to a projected part 2a on the sub-board 2 is fitted to the upper lock bar 8a of the lock piece 8. This construction completes the fixing operation between the sub-board 2 and a main chassis 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a sub-board to a main chassis of an electronic product such as a television receiver.

0002

BACKGROUND OF THE INVENTION In recent years, the circuits of electronic products such as television receivers have become increasingly complex and dense, and for this reason may not be able to fit only on the main chassis (main circuit board). Even if all the circuits are housed in the main chassis, the situation may be worse from the viewpoint of ease of assembly and repairability in the event of a failure. In such cases, a method is often adopted in which some circuits are housed in a sub-board separate from the main chassis, and the sub-board is fixed to the main chassis.

A conventional method for fixing a sub-board to a main chassis will be described below. FIG. 3 shows a conventional fixing device for a sub-board to a main chassis. In the figure, 3 is a chassis frame, which is constructed integrally with the cabinet of the television receiver or is attached to the cabinet. A main chassis 6 is fixed onto the chassis frame 3. One side of the coupler 4a (usually a female coupler) for electrically connecting the sub-board and the main chassis is fixed to the main chassis 6 in advance. A sub-board fixture 1 is fixed onto the chassis frame 3 with mounting screws 6. Sub board fixture 1
has a guide groove 1c for guiding the sub-board 2 and an elastic pawl 1a having an inclined surface 1b. Further, the other side 4b of the coupler (usually a male coupler) is fixed to the sub-board 2 in advance.

FIG. 3 shows a state in which the sub-board 2 has been fixed to the main chassis 6, but in order to remove the sub-board 2 from the main chassis 6, the elastic claws 1a are moved in the direction of arrow B against elastic resistance. to move the sub-board 2 in the opposite direction of arrow A. Conversely, in order to attach the sub-board 2 to the main chassis 6, the sub-board 2 is inserted from the direction of arrow A along the guide groove 1c of the sub-board fixture 1. At this time, the lower end of the sub-board 2 comes into contact with the slope 1b, causing the elastic claw 1a to bend in the direction of arrow B. When the insertion of the sub-board 2 is completed, the protrusion 2a of the sub-board 2 is pressed by the lower surface of the elastic claw 1a to fix the sub-board 2 to the main chassis 6, as shown in the figure. Also, by this insertion, the male coupler 4b on the sub-board 2 is electrically connected to the female coupler 4a on the main chassis 6 at the same time.

[0005]

[Problems to be Solved by the Invention] However, in the configuration of the conventional sub-board fixing device described above, the sub-board 2 is
When inserting in the direction, the lower end of the sub-board 2 is on the slope 1b
The elastic claws 1a are bent in the direction of arrow B, but on the contrary, the sub-board 2 is pushed in the direction of arrow C by the elastic claws 1a, so that the male coupler 4b fixed on the sub-board 2 and the main chassis are There was a problem in that the position of the female coupler 4a fixed on the top of the connector 6 was shifted, making it difficult to connect the two. Further, when the sub-board 2 is repeatedly inserted and removed, the elastic claws 1a become fatigued and there is a problem that sufficient fixing force is not provided.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a sub-board fixing device that allows easy connection of a coupler and securely fixes a sub-board to a main chassis.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention has a main chassis fixed to a chassis frame, a groove perpendicular to the main chassis, and a lower jaw part, and the chassis frame The lock piece includes a fixed guide rib fixed to the lock piece, an upper lock bar and a lower lock bar, and a sub-board having a protrusion that engages with the upper lock bar. After engaging the lower jaw of the fixed guide rib, the sub-board is inserted along the vertical groove of the fixed guide rib, and the upper lock bar of the lock piece is engaged with the protrusion of the sub-board, thereby locking the sub-board into the main board. It is configured to be fixed vertically to the chassis.

[0008]

[Operation] In the above-described structure, the present invention engages the lower lock bar of the lock piece with the lower jaw of the fixed guide rib in advance, and then inserts the sub-board along the vertical groove of the fixed guide rib so that the upper lock bar of the lock piece Since the sub-board is vertically fixed to the main chassis by engaging with the protrusion of the sub-board, one of the couplers on the sub-board and one of the couplers on the main chassis can be easily connected. It is also possible to improve the certainty of fixation.

[0009]

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2.
This will be explained with reference to. In the figure, the same components as in the conventional example are given the same numbers, and therefore their explanations will be omitted.

As shown in the figure, a fixed guide rib 7 is formed integrally with the chassis frame 3.
There is a vertical groove 7a for guiding the sub-board, and a lower jaw portion 7b located at the lower end of the vertical groove 7a and having a recess. The sub-board 2 is provided with a protrusion 2a having a recess 2b on its upper edge so as to protrude laterally. On the other hand, a lock piece 8 is prepared, and the lock piece 8 is composed of an upper lock bar 8a, a lower lock bar 8b, and two connecting plates 8c. To fix the sub-board 2 to the main chassis 6, move the lock piece 8 in advance along the direction shown by the dashed line F, and engage the lower lock bar 8b of the lock piece 8 with the lower jaw part 7b of the fixed guide rib 7. , tilted in the direction of arrow D with respect to the fixed guide rib 7. Next, the sub-board 2 is inserted from the direction of arrow A along the vertical groove 7a of the fixed guide rib 7. At this time, the coupling of the couplers 4a and 4b is easy because no horizontal force is applied as in the conventional example. Figure 2
As shown in the figure, the insertion of the sub-board 2 is completed and the coupler 4a
, 4b are completed, the lock piece 8 is rotated from the position indicated by the two-dot chain line in the direction of the arrow E using the lower jaw portion 7b as a fulcrum, and the lock piece 8 is connected to the recess 2b provided in the protrusion 2a of the sub-board 2. 8 and the upper lock bar 8a. This completes the fixing of the sub-board 2 and the main chassis 6. As described above, in the sub-board fixing device according to the present invention, there is no horizontal component force when the sub-board 2 is inserted downward, so that the couplers 4a and 4b can be easily coupled.

[0011]

As is clear from the above embodiments, according to the present invention, after the lower lock bar of the lock piece is engaged with the lower jaw of the fixed guide rib in advance, the sub-board is moved along the vertical groove of the fixed guide rib. The sub-board is fixed vertically to the main chassis by inserting the above-mentioned lock piece and engaging the upper lock bar of the above-mentioned lock piece with the projection of the above-mentioned sub-board, so that one of the couplers on the sub-board and the top of the main chassis It can be easily connected to one side of the coupler. Since the sub-board is held by the upper lock bar and lower lock bar of the lock piece, the reliability of fixing the sub-board to the main chassis can be improved. Furthermore, unlike the conventional example, there is no problem of reduction in fixing force due to fatigue of the elastic claws, so reliable fixing can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a sub-board fixing device according to an embodiment of the present invention.

FIG. 2 is a side view of a sub-board fixing device according to an embodiment of the present invention.

[Fig. 3] Perspective view of a conventional sub-board fixing device

[Explanation of symbols]

2 Sub board 2a Protrusion 3 Chassis frame 4 Coupler 4a Lower coupler 4b Upper coupler 6 Main chassis 7 Fixed guide rib 7a Vertical groove 7b Lower jaw 8 Lock piece 8a Upper lock bar 8b Lower lock bar

Claims (1)

[Claims] 1. A main chassis fixed to a chassis frame, a fixed guide rib having a groove perpendicular to the main chassis, a lower jaw part and fixed to the chassis frame, an upper lock bar, and a lower lock bar. and a sub-board having a protrusion that engages with the upper lock bar, and after the lower lock bar of the lock piece is engaged with the lower jaw of the fixed guide rib in advance, the sub-board is The sub-board fixing device vertically fixes the sub-board to the main chassis by inserting the locking piece along the vertical groove of the fixing guide rib and engaging the upper lock bar of the lock piece with the protrusion of the sub-board.