JPH04294596A - Floating structure of printed board - Google Patents

Abstract

PURPOSE:To guarantee a stable printed board holding force. CONSTITUTION:Stepped screws 28 and 29 which are respectively inserted through the connector mounting side edge and its opposite edge of a printed board 24 are screwed to a connector plate 21 and the screws 28 and 29 are respectively formed of set screws having guide sections 28a and 29a which are movable when the screws 28 and 29 are screwed to the board 24. Therefore, the bending of the board 24 can be surely suppressed even when the size of the board 24 increases, since the substrate 24 can be guided along the guide sections 28a and 29a of the screws 28 and 29 and the connector mounting side edge and its opposite edge of the board 24 can be held by the connector plate 21 in oscillating states.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating structure of a printed circuit board suitable for use in, for example, an adapter for connecting a VTR (video tape recorder) and a video camera body.

0002

2. Description of the Related Art In recent years, so-called adapter-separated type video cameras, in which a camera body and an adapter for connecting to a VTR are separated, have been frequently used.

Conventionally, this type of camera video has been constructed as shown in FIG. To explain this based on the same figure, in the same figure, what is indicated by reference numeral 1 is a main body for a video camera, which includes a base 4 having an operation switch 2 and a shoulder pad 3, and a front upper end surface of this base 4. A housing 7 provided with a photographing lens 5 and a viewfinder 6, and a large number of electronic components (not shown) housed within the housing 7.
A handle 8 extending in the front-rear direction is attached to the upper part of the housing 7.

Reference numeral 9 denotes an adapter for connecting a VTR, which includes a casing 10 having a pad 10a on its side and opening toward the front, and a large number of electronic components (not shown) mounted inside the casing 10. A printed circuit board (not shown) is provided on the rear upper end surface of the base 4 in a detachable manner. A connector plate 12 is attached to the opening of the housing 10, through which the connector 11 connected to the camera body 1 is inserted, and this connector plate 12 has screw holes 13 for screwing into the camera body 1. is provided. Note that 14 is a battery case.

By the way, this type of video camera has a connector plate 1 because it is necessary to absorb assembly errors.
2 employs a floating structure that swingably holds a printed circuit board (not shown).

[0006]

However, in the conventional floating structure of a printed circuit board, the connector plate 12 holds the connector mounting side of the printed circuit board (not shown), but does not hold the side opposite to the connector mounting side. Therefore, as the size of the printed circuit board (not shown) increases due to the recent trend toward high-density packaging, the deflection of the printed circuit board increases, making it difficult to guarantee stable holding force for the printed circuit board (not shown). The problem was that it was not possible.

The present invention was made in view of the above circumstances, and it is possible to reliably suppress deflection even when the size of a printed circuit board increases, thereby ensuring stable holding force of the printed circuit board. This provides a floating structure for printed circuit boards.

[0008]

[Means for Solving the Problems] The floating structure of a printed circuit board according to the present invention includes a mounting screw that is inserted through the side edge of the printed circuit board on the side where the connector is mounted and the side edge of the side opposite to the side where the connector is mounted, and is screwed into the connector plate. These mounting screws are formed by mounting screws having guide portions that are movable when the printed circuit board is screwed.

[0009]

[Operation] In the present invention, the printed circuit board is guided along the guide portion of the mounting screw, and the side edge of the printed circuit board on the side where the connector is mounted and the side edge on the side opposite to the connector mounting side can be oscillatedly held on the connector plate. can.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of the present invention will be explained in detail with reference to embodiments shown in the drawings.

FIG. 1 is an exploded perspective view showing a floating structure of a printed circuit board according to the present invention, and FIGS.
) is a cross-sectional view showing the main parts of the floating structure of the printed circuit board according to the present invention, and in this figure, the same members as in FIG. In the same figure, an opening 22 through which the connector 11 is inserted is provided at one side edge of the connector plate indicated by the reference numeral 21, and a screw hole 23a opening on one side is provided above and below this opening 22. A stepped pin 23 having a diameter is fixed. Further, the screw hole 23 is provided on the other side edge.
A screw hole 21a is provided that opens in the same direction as the opening direction of a. Further, the upper edge of the connector plate 21 is provided with a screw insertion hole 21b for plate attachment.

Reference numeral 24 denotes a printed circuit board on the adapter side, which is housed in the housing 10 and is connected to the connector plate 2.
1 at intervals. This printed circuit board 2
A holding piece 24a projecting to one side is integrally provided on one side edge of 4, and the screw hole 24a is integrally provided on the other side edge.
A screw insertion hole 24b for mounting a board corresponding to 1a is provided. Then, the holding piece 24 of this printed circuit board 24
A spacer 25 having screw insertion holes 25a corresponding to the screw holes 23a at its upper and lower edges is interposed between the connector 11 and the screw holes 23a.

Reference numeral 26 denotes a notch 26a that fits the holding piece 24a and a screw hole 2 that corresponds to the screw insertion hole 25a.
6b, which is fixed to the connector plate 21, and has the screw holes 2 on the upper and lower edges.
A hook-shaped mounting piece 27 having a screw insertion hole 27a corresponding to 3a is integrally provided.

Reference numeral 28 denotes a first stepped screw as a mounting screw having a guide portion 28a, which is inserted through the screw insertion hole 27a and screwed into the screw hole 23a. The first stepped screw 28 is formed so that the guide portion 28a can be moved in the front-rear direction (direction perpendicular to the front and back surfaces of the printed circuit board 24) when the printed circuit board 24 is in a screwed state.

Reference numeral 29 denotes a second stepped screw as a mounting screw having a guide portion 29a, which is inserted into the screw insertion hole 24b and screwed into the screw hole 21a. The second stepped screw 29, like the first stepped screw 28, is formed so that the printed circuit board 24 can move in the front-rear direction on the guide portion 29a in the screwed state.

Note that reference numeral 30 is a mounting screw inserted through the screw insertion hole 25a and screwed into the screw hole 26b.

Further, 31 is the double stepped screw 28, 29.
The head of the second stepped screw 29 and the screw insertion hole 24
This washer is interposed between the periphery of the opening on one side of the screw insertion hole 24b and between the periphery of the other side of the screw hole 24b and the opening periphery of the screw hole 21a to improve the sliding of the printed circuit board 24.

In such a floating structure of the printed circuit board, the guide portion 28a of the first stepped screw 28
The printed circuit board 24 is guided in the front and back direction along the guide portion 29a of the second stepped screw 29, and the printed circuit board 24 is
The side edge on the side where the connector is mounted and the side edge on the side where the connector is not mounted can be swingably held on the connector plate 21.

Therefore, in this embodiment, even if the size of the printed circuit board 24 increases due to the recent trend towards high-density packaging, it is possible to reliably suppress the deflection of the printed circuit board 24.

[0020]Although this embodiment shows an example of application to a video camera, the present invention is not limited to this, and can be applied to other devices equipped with a printed circuit board in the same manner as in the embodiment. Of course it can be done.

[0021]

[Effects of the Invention] As explained above, according to the present invention, the mounting screws that pass through the side edge of the printed circuit board on the side where the connector is mounted and the side edge of the side opposite to the side where the connector is mounted are screwed into the connector plate, and these mounting screws are screwed into the connector plate. Since the printed circuit board is formed by a mounting screw having a movable guide section when the screw is screwed, the printed circuit board is guided along the guide section of the mounting screw, and the side edge of the printed circuit board on the connector mounting side and the opposite connector are guided. The side edge on the mounting side can be swingably held on the connector plate.

[0022] Therefore, even if the size of the printed circuit board increases due to the recent trend towards high-density packaging, it is possible to reliably suppress the deflection of the printed circuit board, thereby ensuring a stable holding force for the printed circuit board. .

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a floating structure of a printed circuit board according to the present invention.

FIGS. 2A and 2B are cross-sectional views showing essential parts of a floating structure of a printed circuit board according to the present invention.

FIG. 3 is a perspective view showing the entire video camera.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11... Connector, 21... Connector plate, 22... Opening, 24... Printed circuit board, 28... First step screw, 28
a...Guide part, 29...Second stepped screw, 29a...Guide part.

Claims (1)

[Claims] 1. A connector plate having an opening through which a connector is inserted, and a printed circuit board that is attached to the connector plate at a distance and has the connector mounted on one side edge of the printed circuit board, the connector mounting side of the printed circuit board having an opening through which the connector is inserted. Mounting screws that pass through the side edges and the side edge on the side opposite to the connector mounting side are screwed onto the connector plate, and these mounting screws are formed by mounting screws having guide portions that are movable when the printed circuit board is in a screwed state. The floating structure of the printed circuit board is characterized by: