JPH0356073Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electronic circuit package that accommodates a plurality of sub-boards, and particularly to a guide rail fixing structure for a printed wiring board.

[Prior Art] Recently, a mounting system has been developed that allows a single electronic circuit package to accommodate a plurality of arbitrary sub-boards of different types depending on the purpose of use.

A front view and a right side view of the structure of such an electronic circuit package are shown in FIGS. 6 and 7, respectively. The main board 4, which has a U-shaped front side, is fixed to the circuit surface cover 2, which has a U-shaped cross section, on the back side of the structure, and the guide rail 1 is fixed to the circuit surface cover 2, which has a U-shaped cross section, with screws 9, and the guide rail 1 is fixed to the circuit surface cover 2, which has a U-shaped cross section.
A connector (for motherboard fitting) 5 and a connector (main board side) 3 are mounted on the main board 4. Each of the plurality of sub-boards 6 carries a connector (for sub-board) 7, and each sub-board 6 is inserted between the opposing grooves 1a of the pair of upper and lower guide rails 1 to connect the connector 7 to the connector 3. Fit the connector.

Conventionally, the structure for fixing the guide rail 1 to the circuit surface cover 2 is as shown in FIG. It was designed to be fixed by screwing into the female screw 1b.

[Problems to be solved] In the conventional guide rail fixing structure described above,
In Figure 7, the depth dimension of guide rail 1 is female thread 1.
The width B of the electronic circuit package including the circuit surface cover 2 and the screws 8 becomes wider because the length is increased by the amount by which the width B is cut. This results in a reduction in the packaging density of electronic components. Furthermore, since it is necessary to tighten at least two screws 8 per guide rail 1, there is a problem that assembly work takes time.

[Means for Solving Problems] The present invention solves the above problems, and consists of assembling a circuit surface cover to which a guide rail is fixed and a main board, and then attaching a sub-board that is guided and inserted through the guide rail. 1 connector and the second connector of the main board
In the electronic circuit package configured to be fitted with a second connector of the main board, an insertion hole is provided at one end of the guide rail, a cut piece is provided at one end of the circuit surface cover, and both ends of the second connector of the main board are provided with an insertion hole. Stepped portions are formed, the insertion holes of the guide rails are inserted into the sections of the circuit surface cover, and the other ends of the guide rails are inserted and locked into the stepped portions of the second connector. It is.

[Example] Next, an example will be described with reference to FIGS. 1 to 5.

1 and 2 are respectively a front view and a right side view of an embodiment of a guide rail fixing structure for an electronic circuit package according to the present invention, and FIGS. 3 to 5 are respectively a guide rail constituting the above structure, 7A and 7B are perspective views of a circuit surface cover and a main board side connector that fits into a sub board side connector, and the same parts as in FIGS. 6 and 7 in each figure are given the same reference numerals.

The overall configuration of FIG. 1 is substantially the same as that of FIG. 6, and there is a circuit surface cover 2-1 on the back side of the main board 4, to which the guide rail 1-1 is fixed. The main board 4 has a connector (for mating with the motherboard) 5
And the connector (main board side) 3-1 is mounted. The sub-board 6 carries a connector (sub-board side) 7,
The sub board 6 is inserted into the opposing groove 1a of the guide rail 1-1.
connectors 3-1 and 7 to the main board 4.
Fit the connectors together.

Here, an insertion hole 1d is provided in the convex portion 1c at one end of the guide rail 1-1 shown in FIG.
The guide rail 1 is attached to the circuit surface cover 2-1 in Figure 4.
-1 There is a cutting and bending section 2a for fixing. In addition, a guide rail 1 is attached to the connector 3-1 on the main board 4 side in Fig. 5.
-1 Stepped portions 3a for fixing are provided at both ends.

Therefore, the guide rail 1-1 is connected to the circuit surface cover 2.
-1, insert the cut and bent piece 2a of the circuit surface cover 2-1 into the insertion hole 1d at one end of the guide rail 1-1, and then insert the other end of the guide rail 1-1 onto the main board 4. into the stepped part 3a of the connector 3-1.

As a result, each guide rail 1-1 is held by the engagement of the insertion hole 1d and the section 2a on one end side, and the engagement with the stepped portion 3a of the connector 3-1 on the other end side. . Therefore, fixing screws are not required, and therefore, the width A of the electronic circuit package in FIG. 2 can be reduced accordingly.

[Effects of the invention] As explained above, according to the invention, the guide rail can be attached to the circuit surface cover by engaging the insertion hole and the cut piece, and by engaging the stepped part of the main board side connector. Therefore, there is no need for fixing screws, which reduces the width of the electronic circuit package and improves the mounting density of electronic components, and also eliminates the need for screw tightening work, which has the effect of reducing work time. .

[Brief explanation of the drawing]

1 and 2 are respectively a front view and a right side view of an embodiment of a guide rail fixing structure for an electronic circuit package according to the present invention, and FIGS. 3 to 5 are respectively a guide rail constituting the above structure, FIGS. 6 and 7 are perspective views of the circuit surface cover and the main board side connector that fits into the subboard side connector, and are a front view and a right side view of a conventional guide rail fixing structure of an electronic circuit package. 1, 1-1...Guide rail, 1a...Groove, 1
b...screw hole, 1d...insertion hole, 2, 2-1...
Circuit surface cover, 2a... cut section, 3, 3-1
...Main board side connector, 3a...Stepped part, 4...
Main board, 5...Motherboard mating connector, 6
...Sub board, 7...Sub board side connector, 8,
9...screw.

Claims (1)

[Scope of utility model registration request] An electronic device having a configuration in which a circuit surface cover to which a guide rail is fixed and a main board are assembled, and a first connector of a sub-board guided and inserted through the guide rail is fitted with a second connector of the main board. In the circuit package, an insertion hole is formed at one end of the guide rail, a cut section is formed at one end of the circuit surface cover, and stepped portions are formed at both ends of the second connector of the main board, and the guide A guide rail fixing structure for an electronic circuit package, wherein an insertion hole of the rail is inserted into a section of the circuit surface cover, and the other end of the guide rail is inserted and locked into a stepped portion of the second connector.