JPH0543504Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a grounding structure between a substrate and a device base in an electronic device having a removably installed substrate.

(Prior Art) Conventionally, the substrate grounding structure of this type of electronic device is known as shown in FIG. 3 or FIG. 4. In the figure, 1 is a substrate, 2 is a lower cover of the device, and 3 is a conductive base attached to the lower cover 2, such as a metal plate.
4 is the connection cord, 5 is the tongue-shaped case ground [hereinafter FG
It is an elastic part called (Frame Ground).

FIG. 3 is a perspective view showing an example of a conventional board casing grounding structure, in which a base 3 is placed on a lower cover 2 of the device, and a protruding board guide 3a formed integrally with the lower cover 2 is attached to a board. Guide 1 is inserted. The connection cord 4 is configured to be grounded from the board 1 to the base 3 by fixing both ends thereof to the board 1 and the base 3.

Moreover, FIG. 4 is a side view showing another conventional example,
A shows the state before the board is inserted, and B shows the state after the board is inserted. In this case, the configuration in which the base 3 is placed on the lower cover 2 of the device is the same as the conventional example shown in FIG. The difference from the case shown in FIG. 3 is that the FG spring 5 is pressed against the conductive base 3 and the substrate 1 is grounded to the base 3.

(Problem to be solved by the invention) However, in the grounding configuration of the board as shown in FIG. 3, it is difficult to attach and detach the board 1 because the connection cord 4 is fixed. In the case of this structure, there were drawbacks such as deformation of the FG spring 5 when the board 1 was attached and detached, and difficulty in achieving stable grounding.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the difficulty and instability of mounting and removing a board, which are present in the prior art, and to provide an electronic device with an excellent board mounting structure.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to FIG. 1 corresponding to the embodiment. In an electronic device having a case grounding means between the conductive bases provided, at one end of the bottom surface of the substrate 11
By providing the FG bracket 11a and inserting and sandwiching the bracket 11a between the elastic portion 13a formed at one end of the conductive base 13 and the lower cover 12 when the board 11 is inserted, the casing of the board 11 can be secured. It forms a grounding structure.

(Function) According to the present invention, as described above, the substrate 11 has
In addition to the vertically disposed FG bracket 11a, a plurality of tongue-like elastic plates each having a guide portion 13b whose tip is slightly bent upward is attached to one end of the base 13 made of metal, for example, in order to connect to the FG bracket 11a. Since the portion 13a is formed, when the board 11 is inserted, the FG bracket 11a is attached to the tongue piece 1.
3a and the lower cover 12, and due to the elasticity of the elastic portion 13a, the FG
The bracket 11a is in close contact with the base 13 to provide a good grounding effect for the casing. As a result, an electronic device with an excellent board mounting structure can be obtained, and the above-mentioned problems can therefore be eliminated.

(Embodiment) Fig. 1 is an exploded perspective view showing an embodiment of the present invention, and in the figure, reference numeral 11 indicates an FG bracket 11 at one end.
a board having a vertically extending handle 11b and a puller 11b protruding from the other end;
12 is a lower cover molded from plastic or the like; 13 is a metal base plate mounted on the lower cover 12; its input end is cut into a plurality of tongue-like elastic pieces to provide an elastic effect; A portion 13a is formed, the tip of which is slightly bent upward to form a guide 13b. In addition,
A plurality of protruding board guides 14 are integrally molded with the lower cover 12 and are provided in two rows facing each other, and guide grooves for mounting and removing the board are provided on their opposing surfaces.

Next, the board mounting method of the embodiment configured as above will be explained using FIG. 2. First, as shown in FIG. 1, when the puller 11b of the board 11 is pulled in the direction of the arrow, the board 11 is The substrate is guided by the substrate guide 14 and pulled toward the base 13. At the same time, the FG bracket 11a of the board 11 is
Move the lower cover 1 in the direction of the arrow as shown in Figure A.
2 and the tip of the base 13, and as it continues to move, as shown in FIG. 2B, the lower cover 1
The FG bracket 11a is sandwiched and firmly supported between the FG 2 and the base 13 against the downward pressure of the elastic portion 13a. Therefore, the substrate 11 can be well grounded to the base 3. In addition, substrate 1
1, pull the puller 11b in the opposite direction to the arrow.
This can be done easily and safely by pulling it out.

(Effects of the invention) As explained in detail above, according to the invention, the FG bracket vertically installed on the board is stabilized by sandwiching it between the tongue-like elastic part provided elastically on the base and the lower cover. A good grounding can be obtained,
It has become easier to attach and detach the board to the device, and it has become possible to prevent the deformation of the FG spring due to attachment and detachment as in the past. Therefore, it is possible to easily replace the board, and it is possible to provide an electronic device with an excellent board mounting structure at a low cost.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIGS. 2A and B are side views of the embodiment of the present invention when the board is removed and attached, respectively, FIG. 3 is a perspective view showing a conventional example, and FIG.
Figures A and B are side views of conventional circuit boards when they are removed and attached. 11... Board, 11a... FG bracket,
11b...Puller, 12...Lower cover, 13...
... Base, 13a ... Elastic part, 14 ... Board guide.

Claims (1)

[Scope of utility model registration request] In an electronic device having a case grounding means between a removably installed board and a conductive base mounted on a lower cover, a case grounding bracket is provided vertically at one end of the bottom surface of the board, and when the board is inserted, An electronic device characterized in that the substrate is grounded to the casing by inserting and sandwiching the bracket between an elastic portion formed at one end of the conductive base and the lower cover.