JPH0672287U - Circuit board internal unit - Google Patents

Abstract

(57) [Summary] [Constitution] A chassis case 10 having a bottom surface 10c and a side surface 10d and an upper surface opened, and two or more circuit boards 2 arranged vertically apart from each other in the chassis case.
0, 40, and a circuit board internal unit in which a male connector 20b and a female connector 40b, which are fitted to each other in the vertical direction in a state where they are arranged to face each other, are separately fixed. In the bottom surface of the chassis case and the two or more circuit boards, through holes 10a, 20a, 30 are formed at the same position facing each other in the vertical direction.
a and 40a are provided. [Effect] By inserting the positioning means such as a pin into the through hole, the connectors can be fitted with high accuracy without causing positional displacement between the circuit boards. That is, workability, reliability at the time of assembly, etc. are secured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a circuit board internal unit in which circuit boards used in audio equipment and the like are installed in multiple stages, and in particular, a circuit board internal type in which boards arranged in multiple stages are connected by a rigid connector to exchange electric signals. Regarding the unit.

[0002]

[Prior art]

 As a conventional circuit board internal unit, there is a unit in which a circuit board is arranged in two upper and lower stages in a chassis case. FIG. 1 is an external perspective configuration diagram showing such a conventional circuit board internal unit. As shown in the figure, the first circuit board 2 is supported and fixed on the bottom of the chassis case 1 by the fixing claw member 6, and the second circuit board 4 is covered on the upper portion of the chassis case 1. The encased shield case 3 is supported by supporting members 5 on all sides and is fixed to the upper part of the chassis case body.

As shown in FIG. 2, rigid connectors are provided on both circuit boards, that is, a male connector 2a and a second circuit board are provided on the first circuit board 2. A female connector 4a is provided on the connector 4, and both connectors 2a and 4a are in a proper mating state when both circuit boards are mounted at predetermined positions in the chassis case.

The second circuit board 4 is covered with a shield case 3 as shown in FIGS. A support member 5 made of a resin material of an external fitting and holding method is externally fitted on the four sides of the shield case 3, and is fixed to the chassis case 1 with screws 7 or the like via the support member 5. When assembling the circuit board internal unit having the above-described structure, first, the first circuit board 2 is fixed to the bottom of the chassis case 1, and then the shield case 3 with the support member 5 fitted to the bottom is arranged from above. Install the circuit board 1 so that it faces the circuit board 2. At this time, the terminals of the male connector 2a placed on the first circuit board passed through an opening (not shown) provided in the shield case 3 and placed on the second circuit board. It is necessary to assemble the female connector 4a so that the female connector 4a is inserted into the insertion hole.

However, it is difficult to visually recognize the terminals of the male connector 2a when the shield case 3 is held at the upper position facing the first circuit board 2 so as to be mounted, and both the connectors 2a and 4a are visible. The connection of the shield case 3 depends on the experience and feeling of the operator, and although the horizontal position of the shield case 3 is restricted by the support member 5, the positional relationship between the shield case 3 and the chassis case 1 and the first The positional relationship between the circuit board 2 and the chassis case 1 is not precise, and as a result, it takes a long time if the assembly is done carefully, and if the assembly is hurried, mis-fitting due to misalignment may occur. However, the structure was not preferable in terms of workability and reliability.

[0006]

[Problems to be solved by the device]

 In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a circuit board internal unit in which circuit boards each mounting a connector are arranged in several stages. It is an object of the present invention to provide an internal circuit board unit that can achieve yield improvement, product reliability improvement, and cost reduction by reducing the number of parts.

[0007]

[Means for Solving the Problems]

 The circuit board internal unit according to the present invention includes a chassis case having a bottom surface and side surfaces and an open top surface, and two or more circuit boards vertically spaced apart in the chassis case. A circuit board internal unit in which a male connector and a female connector, which are fitted to each other in the up-down direction in a state where they are opposed to each other, are separately fixed to each of the boards, the bottom unit of the chassis case and The two or more circuit boards are characterized in that through holes are provided at the same position facing each other in the vertical direction.

[0008]

[Action]

 When assembling the components of the circuit board internal unit according to the present invention, since the through holes are provided on the bottom surface of the chassis case and all the circuit boards arranged in multiple stages, for example, the bottom surface of the chassis case is preliminarily provided. If the positioning pins are inserted through the provided through-holes, by assembling the pins so that they will pass through the through-holes provided in each board when the circuit boards are placed, Positioning in the horizontal direction is performed with high accuracy. Therefore, the connectors provided on the respective circuit boards can be fitted with high precision without relying on visual observation or feeling.

[0009]

【Example】

 An embodiment of a circuit board internal unit according to the present invention will be described below with reference to the drawings. FIG. 4 is an external perspective configuration diagram of the circuit board internal unit according to the present embodiment, FIG. 5 is a sectional view taken along line CC of FIG. 4, and FIG. 6 is a sectional view taken along line DD of FIG. It is shown.

As shown in FIG. 4, the first circuit board 20 is arranged and fixed on the bottom surface side in the chassis case 10 formed by the bottom surface 10c and the side surface 10d. A shield case 30 enclosing the second circuit board 40 is disposed and fixed above the second circuit board 40 at a predetermined interval. Here, in the first circuit board 20, after the four fixing tab members 60 provided upright on the bottom surface of the chassis case are passed through the holes 20c (see FIG. 7), the upper end portion thereof is bent, It is fixed to the chassis case body.

On the other hand, in the second circuit board 40 (and the shield case 30), a recess 30b is formed in a part of the shield case to expose a part of the board 40, and a hole provided in the exposed part. The fixing claw member 50 fixed to the inner side surface 10d of the chassis case (see FIG. 5) is inserted through 40c, and the end portion 50a is bent to be fixed to the chassis case body. Although the fixing claw member 50 is fixed at only two positions, it is of course possible to fix the fixing members in each of the four directions, that is, at four positions.

Further, a rigid type male connector 20b and a rigid type female connector 40b are fixedly provided on the first circuit board 20 and the second circuit board 40, respectively. The connectors 20b and 40b are fitted to each other in the normal state when the connector is placed in the normal position. As described above, the chassis case in which the circuit boards are arranged in two steps is projected onto the jig base 80 when mounted on the jig base 80 as shown in FIGS. 4 and 6. The bottom surface 10c of the chassis case, the first circuit board 20, the shield case 30, and the second circuit are arranged so that the two positioning pins 80a provided can pass through the entire unit from the bottom to the top of the chassis case. Two through holes 10a, 20a, 30a and 40a are formed in each of the substrates 40.

The through hole 20a of the first circuit board and the through hole 40a of the second circuit board have a pin (pin) so that there is no play (rattle) when the positioning pin 80a is inserted. It is formed with high precision so that the hole diameter is slightly larger than the outer diameter. There is no problem if the through holes 10a of the chassis case and the through holes 30a of the shield case are slightly larger in diameter than the outer diameter of the pin. As long as the holes 30a are formed with high accuracy like the through holes 20a and 40a of both circuit boards, when the upper end of the positioning pin 80a is inserted into the through hole 30a of the lower surface of the shield case, the second pin 30a is substantially second. Since the circuit board 40 is positioned, it is convenient in terms of workability.

In this embodiment, two circular through holes 10a, 20a, 30a, 40a are provided so that the two positioning pins 80a can be inserted, whereby the horizontal direction (X direction, Positioning is performed in the (Y direction), but if such through holes are elongated holes and positioning pins whose cross-sections match the elongated holes are used, it is not necessary to provide two holes each. The through-holes allow sufficient horizontal positioning.

A procedure for assembling the circuit board internal unit of the present embodiment having the above-described configuration will be described below. First, as shown in the plan view of FIG. 7, the first circuit board 20 is inserted into the bottom side of the chassis case 10, and the fixing claw member 60 is inserted into the hole 20c of the chassis case 10. The positioning protrusion 10b is arranged so that the circuit board is positioned in both XY directions. Then, the circuit board 20 is fixed by bending the upper end of the fixing claw member 60.

As a result, the circuit board 20 is firmly fixed to the chassis case 10 in the three directions of X, Y, and Z. Next, the chassis case in this state is placed on the jig base 80 so that the positioning pins 80a pass through the through holes 10a, 20a. Then, in a state where the positioning pin 80a is inserted from the lower side to the upper side of the chassis case 10, the shield case 30 encapsulating the second circuit board 40 faces the first circuit board 20 from the upper side. At the same time, the tip of each positioning pin is visually aligned with the through hole 30a (substantially through hole 40a).

After that, when the shield case 30 is pushed down by using the positioning pin 80a as a guide, the terminals of the male connector 20b fixed on the first circuit board 20 are placed in the second case arranged in the shield case. The connector is fitted in the terminal hole of the female connector 40b fixed on the circuit board 40, and the fitting of both connectors is surely performed without deviation. When the mating of both connectors is completed, the fixing claw member 50 is inserted into the hole 40c provided in the exposed portion of the second circuit board 40, and the second circuit board 40 (and the shield case 30) is also inserted. Is supported by the flat portion of the fixing tab member. Therefore, the second circuit board 40 (and the shield case 30) is firmly fixed to the chassis case 10 by bending the end portion 50a of the inserted fixing claw member.

The fixing claw members 60 and 50 do not have to be separate members fixed to the chassis case. For example, the bottom surface 10c and the side surface 10d of the chassis case 10 body are partially cut and raised. It is also possible to use a fixing claw member. In the embodiment described above, the unit in which the circuit boards are arranged in two stages is shown, but the same applies to a unit in which the circuit boards are arranged in multiple stages such as three stages or four stages. The present invention can be applied to.

[0019]

[Effect of device]

 As described above, in the circuit board built-in unit according to the present invention, through holes are formed in the bottom surface of the chassis case and all the circuit boards arranged vertically in multiple stages at the same position facing each other in the vertical direction. Since the circuit board is arranged in multiple stages and the connectors provided on the respective boards are fitted together, the through holes can be used to perform horizontal positioning, and The circuit board can be assembled easily and surely.

That is, the assembling work can be performed easily, in a short time, and reliably without depending on the feeling of the operator, thereby improving the product yield, improving the reliability of the product, and operating time. It is possible to achieve a reduction in product cost and the like at the same time.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a conventional circuit board internal unit.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a perspective view showing the outer appearance of an embodiment of a circuit board internal unit according to the present invention.

5 is a sectional view taken along line CC in FIG.

6 is a sectional view taken along line D-D in FIG. 4.

FIG. 7 is a plan view showing a state in which the first circuit board is mounted in the chassis case in the circuit board internal unit according to the present invention.

[Explanation of symbols for main parts]

 10 chassis case 10a, 20a, 30a, 40a through hole 10b protrusion 10c bottom surface 10d side surface 20 first circuit board 20b male connector 30 shield case 40 second circuit board 40b female connector 50, 60 fixing tab member 80 Jig stand 80a Positioning pin

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masahiro Ichikawa 25 Nishimachi, Yamada, Kawagoe City, Saitama Prefecture 1 Pioneer Co., Ltd. Kawagoe factory (72) Inventor, Kazuhiro Miyashita 25 Nishimachi, Kawagoe, Saitama Prefecture 1 Nishimachi, Yamada Pioneer Co., Ltd. Kawagoe Factory (72) Inventor Toru Hosoda 25-25 Nishimachi, Yamada, Kawagoe, Saitama Prefecture Pioneer Co., Ltd. Kawagoe Factory (72) Nobuhiro Sekine 25-1 Nishimachi, Kawagoe, Saitama Prefecture Pioneer Co., Ltd. Kawagoe Plant (72) Inventor Junichi Sakurabayashi 25, Nishi-machi, Yamada, Kawagoe City, Saitama Prefecture 1 Pioneer Co., Ltd. Kawagoe Plant

Claims (1)

[Scope of utility model registration request] 1. A chassis case, which has a bottom surface and side surfaces and whose top surface is open, and two or more circuit boards that are vertically separated from each other in the chassis case. A circuit board built-in unit in which a male connector and a female connector, which are fitted in the up-down direction while being opposed to each other, are separately fixed, the bottom surface of the chassis case and the two or more sheets. The circuit board internal unit, wherein the circuit board is provided with through holes at the same position facing each other in the vertical direction.