JPH07263883A - Electronic unit - Google Patents

Abstract

PURPOSE:To prevent false connection of a card-type printed substrate though the configuration of unit cases is single by arranging a connector in a position to be connected to a connector part of a card-type printed substrate provided inside a cartridge unit. CONSTITUTION:Card-type printed substrates 24A, 24B, 24C are inserted and held at a plurality of positions inside each unit case 22 of the same configuration. A plurality guide means for the above operation and a plurality of windows 27A, 27B, 27C for making a connector part of the card-type printed substrates 24A, 24B, 24C contained by the guide means pass through are shaped. This unit is provided with a plurality of cartridge unit insertion holes for mounting the cartridge unit 21C and a mother board case 28 having connectors 31A, 31B, 31C arranged in a position which can be connected to a connector part of the card-type printed substrates 24A, 24B, 24C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic unit developed to prevent erroneous insertion of a cartridge unit having a card type printed circuit board on which electronic parts are mounted.

[0002]

2. Description of the Related Art As an electronic unit equipped with a conventional cartridge unit of this type, for example, FIGS.
There is a structure as shown in.

In the figure, 1 is a unit case 2 and
A cartridge unit in which one card-type printed circuit board 4 on which an electronic component 3 is assembled is inserted and held in the unit case 2, and 5 is a plurality of card edges mounted on the motherboard 6. The card edge connector 5 is a connector, which is opposed to a plurality of cartridge unit insertion holes 8 provided in the motherboard case 7, and the cartridge unit 1 is inserted into the cartridge unit insertion holes 8. As a result, the connector portion 9 formed at the tip of the card type printed circuit board 4 is fitted and inserted into the card edge connector 5, and the intended circuit connection is made.

In order to prevent an error in the orientation of the cartridge unit 1 when the cartridge unit 1 is inserted into the motherboard case 7, the unit case 2 and the cartridge unit insertion hole 8 into which the unit case 2 is inserted are provided. Protrusions (or protrusions) 10 for restricting the orientation are provided on both sides of the cartridge unit 1, and the cartridge unit insertion hole 8 of the motherboard case 7 is provided.
A notch 11 into which the protrusion 10 is engaged is provided on each of the opposite sides of the cartridge 1 to prevent erroneous insertion of the cartridge unit 1.

[0005]

However, in such an electronic unit having the conventional structure, a pair of protrusions 10 and a pair of concave grooves for regulating the insertion direction of the unit case 2 inserted into the cartridge unit insertion hole 8 are provided. Since the cartridge unit 1 is provided, the cartridge unit 1 is not inserted into the cartridge unit insertion hole 8 in the wrong direction, but each cartridge unit 1 and each cartridge unit insertion hole 8 has a single shape. Therefore, since any cartridge unit 1 can be inserted into any cartridge unit insertion hole 8, when the circuit function of the card type printed circuit board 4 assembled in each cartridge unit 1 is different, When the cartridge unit 1 is erroneously inserted, the predetermined cartridge unit 1
Was not inserted into the predetermined cartridge unit insertion hole 8.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a plurality of card type printed circuit boards for inserting and holding the card type printed circuit boards in a plurality of locations inside a unit case having the same shape. A guide means and a window penetrating the connector portion of the card type printed circuit board guided by the guide means are provided, and a card type printed circuit board inserted and held by the specific guide means is provided in the motherboard case. The cartridge unit is fitted, and the connector is arranged at a position to be connected to the connector portion of the card type printed circuit board provided in the cartridge unit. An object of the present invention is to provide an electronic unit capable of preventing erroneous connection of a printed circuit board.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

Embodiment 1 In FIGS. 5 to 11, 21A, 21B, and 21C are unit case 22 having the same shape and various electronic parts 23 are assembled to form a circuit having different functions. Card type printed circuit boards 24A, 24
A plurality of cartridge units configured by mounting any one of B and 24C in the unit case 22, wherein a plurality of card type printed circuit boards 24A, 24B are provided on a pair of opposing wall surfaces in the unit case 22. , 24
Guide grooves 25A, 2 for guiding any one of C
5B and 25C are provided. That is, in FIG. 5, the card-type printed circuit board 24A is attached to the unit case 22.
The guide groove 25A inserted in the inner right side, the guide groove 25B in which the card type printed circuit board 24B is inserted in the center of the inside, and the guide groove 25C in which the card type printed circuit board 24C is inserted on the inner left side face each other. The walls are formed symmetrically and at equal intervals. The guide grooves 2 are provided on the bottom surface of each unit case 22.
A window 27 through which the connector portion 26 (see FIG. 11) formed corresponding to 5A, 25B, 25C and formed on the card type printed circuit boards 24A, 24B, 24C is penetrated.
A, 27B and 27C are formed.

Reference numeral 28 denotes a mother board case in which a mother board 29 on which electronic parts (not shown) are mounted is attached. The upper wall of the mother board case 29 has three cartridge unit insertion holes 30A, 30B.
30C, respectively, and further, on the motherboard 29, a connector 31A is provided at a position corresponding to the window 25A which is eccentric to the right of the cartridge unit insertion hole 30A, and in a position corresponding to the window 25B. Similarly, the connector 31B is arranged at a position corresponding to the window 25C.

Reference numeral 32 designates a ridge (or protrusion) for regulating the direction, which is formed in the unit case 22 as in the conventional example, and 33.
Is each cartridge unit insertion hole 30A, 30B, 30
Notches formed on the opposite edges of C for guiding the protrusions 32, 34 denotes an upper lid that closes the upper opening of each unit case 22, and the upper lid 34 is a card-type printed circuit board 24A, It has a function of preventing the 24B and 24C from coming off.

The structure of this embodiment has been described above. Next, the operation will be described. The unit case 22 having the same shape.
Inside, three guide grooves 25A, 25B, 25C and windows 27A, 27B, 27C corresponding to the guide grooves are formed at equal intervals in the left-right direction.
Card type printed circuit board 2 using A, 25B and 25C
4A, 24B and 24C can be selectively inserted and mounted.

Then, each guide groove 25A, 25B, 25C
Card type printed circuit board 24A with different functions
3 types of cartridge units 21A, 21B, 21C with 24B, 24C mounted are configured, and these cartridge units 21A, 21B, 21C are placed in the cartridge unit insertion holes 30A, 30B, 30C provided in the motherboard case 28. When the unit case 22 is inserted, the outer shape of each unit case 22 is substantially the same.
Incorrect insertion of the cartridge units 21A, 21B, 21C to be inserted into the A, 30B, 30C occurs.

However, in this embodiment, the card type printed circuit board 24A incorporated in the cartridge unit 21A is eccentrically arranged on the right side in the unit case 22 and is arranged on the right side of the insertion hole 30A as shown in FIG. A card-type printed circuit board 24B that can be fitted and electrically connected to the connector 31A arranged and is incorporated in the cartridge unit 21B is a connector arranged in the center of the unit case 22. The card-type printed circuit board 24C incorporated in the cartridge unit 21C can be electrically connected to the connector 31C provided on the left side of the unit case 22. Can be connected to each other. For example, even if the cartridge unit 21A incorporating the card type printed circuit board 24A is inserted into the cartridge unit insertion hole 30B or 30C, the relationship of the mounting positions of the card type printed circuit board 24A and the connector 31B or 31C does not match, Other connectors 31B, 31
It is not possible to connect to C, and thus it is possible to avoid erroneous connection between a connector outside the setting and the printed circuit board.

Embodiment 2 Referring to FIGS. 12 to 15, in this embodiment, a connector portion 26 formed at the tip of card type printed circuit boards 24B and 24C assembled in, for example, cartridge units 21B and 21C is shown in FIGS. , The printed circuit boards 24B and 24C are formed so as to be offset in the width direction of the printed circuit boards 24B and 24C. The connectors 31B and 31C are provided on the mother board 29 so as to face the cartridge unit insertion holes 30B and 30C. Size, (mounting position)
13 is displaced so that the offset connector portion 26 is fitted as shown in FIG. 13, even if the connectors 30B and 30C are arranged on the same left side in the cartridge unit insertion holes 30B and 30C. , The cartridge unit 21B is attached to the connector 31C in the cartridge unit insertion hole 30C in the same manner as the cartridge unit 2 due to the displacement in the front-back direction.
1C cannot be inserted and connected to the connector 31B in the cartridge unit insertion hole 30B, which also prevents erroneous connection between the card type printed circuit board and the connector other than the setting.

Embodiment 3 Referring to FIGS. 16 to 20, in this embodiment, three pairs of guide grooves 25A, 25 are formed on the inner wall surfaces of the cartridge units 21A, 21B, 21C facing each other.
From the mutual distance of B and 25C, that is, from the center of each unit,
The distances L1, L2, L3 to the respective central portions of the guide grooves 25A, 25B, 25C are made different, and the guide grooves 25A, 25B, 25C are inserted and held in any one of the guide grooves. As shown in FIG. 17, each of the connectors 31A,
31B and 31C are arranged on the mother board 29.

Therefore, the cartridge unit 21A having the card type printed circuit board 24A inserted and held in the guide groove 25A has the cartridge unit insertion hole 30.
The connector 31A can be inserted into the connector A to be connected to the connector 31A. However, even if the printed circuit board 24A is inserted into the other cartridge unit insertion hole 30B or 30C, the position of the corresponding connector 31B or 31C is not aligned. They do not match and cannot be connected to those connectors 31B or 31C.

Similarly, the connector portion 26 of the cartridge unit 21B cannot be connected to the connector 31A or 31c, and the connector portion 26 of the cartridge unit 21C cannot be connected to the connector 31A or 31B, so that the incorrect connection of the electronic circuit can be prevented. It is a thing.

In the case of this embodiment, even if the cartridge units 21A, 21B and 21C are inserted with their directions turned 180 °, the card type printed circuit boards 24A, 24B and 24C and the connectors 31A mounted in the respective units are inserted. ，
Since the card type printed circuit board and the connector cannot be connected to each other due to the positional displacement of both 31B and 31C, the protrusion 32 and the notch 33 as shown in the first and second embodiments are provided in the unit case 22 and It is not necessary to provide the motherboard case 28.

Reference numeral 35 is the cartridge unit 1.
It is an enclosure frame member for protecting the cartridge when an external force is applied from the lateral direction.

[0020]

As described above, according to the present invention, a plurality of guiding means for inserting and holding a card type printed circuit board in a plurality of places inside each unit case having the same shape, and a card type print housed by the guiding means. A card-type print in which a plurality of windows for penetrating the connector portion of the board are formed, and any one of the plurality of guide means is selected and inserted and held in the unit case. Connected to a cartridge unit having a board, a plurality of cartridge unit insertion holes for mounting the cartridge unit, and a connector portion of a card type printed circuit board incorporated in the cartridge unit mounted in the cartridge unit insertion hole. Electronic unit including a motherboard case having a connector arranged in a position for obtaining Therefore, according to this, while using the unit case of the same shape (single shape), it is possible to prevent erroneous connection (misplacement) of the cartridge units having different electronic circuits, which makes the unit case economical. And the reliability of the connection circuit are improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional cartridge unit.

FIG. 2 is an explanatory plan view showing an arrangement of connectors into which a cartridge unit of a conventional example is inserted.

FIG. 3 is a plan view of a conventional cartridge unit.

FIG. 4 is a front view of a card-type printed circuit board that constitutes a conventional cartridge unit.

FIG. 5 is a sectional view showing a cartridge unit according to the first embodiment of the present invention.

FIG. 6 is an explanatory plan view showing the arrangement of connectors into which the cartridge unit of the first embodiment of the present invention is inserted.

7A and 7B are a plan view and a side view of the cartridge unit according to the first embodiment of the present invention.

8A and 8B are a plan view and a side view of the cartridge unit according to the first embodiment of the present invention.

9A and 9B are a plan view and a side view of the cartridge unit according to the first embodiment of the present invention.

FIG. 10 is a plan view showing only a unit case of the cartridge unit according to the first embodiment of the present invention.

FIG. 11 is a front view of a card type printed circuit board used in the first embodiment of the present invention.

FIG. 12 is a sectional view showing a cartridge unit according to a second embodiment of the present invention.

FIG. 13 is an explanatory plan view showing the arrangement of connectors into which the cartridge unit of the second embodiment of the present invention is inserted.

FIG. 14 is a front view of a card type printed circuit board used in the cartridge unit of the second embodiment of the present invention.

FIG. 15 is a front view of a card type printed circuit board used in the cartridge unit of the second embodiment of the present invention.

FIG. 16 is a sectional view showing a cartridge unit according to a third embodiment of the present invention.

FIG. 17 is an explanatory plan view showing the arrangement of connectors into which the cartridge unit of the third embodiment of the present invention is inserted.

18A and 18B are a plan view and a side view of a cartridge unit according to a third embodiment of the present invention.

19A and 19B are a plan view and a side view of a cartridge unit according to a third embodiment of the present invention.

20A and 20B are a plan view and a side view of a cartridge unit according to a third embodiment of the present invention.

[Explanation of symbols]

21A, 21B, 21C ... Cartridge unit 22 ... Unit case 23 ... Electronic component 24A, 24B, 24C ... Card type printed circuit board 25A, 25B, 25C ... Guide groove 26 ... Connector part 27A, 27B, 27C ... Window 28 ... Motherboard case 29 ... Motherboard 30A, 30B, 30C ... Cartridge unit insertion hole 31A, 31B, 31C ... Connector 32 ... Projection 33 ... Notch 34 ... Upper lid 35 ... Cartridge protection frame member

Claims (3)

[Claims] 1. A plurality of guide means for inserting and holding a card type printed circuit board in a plurality of places inside each unit case having the same shape, and a connector part of the card type printed circuit board housed by the guide means for penetrating. A plurality of windows are formed in the unit case,
A cartridge unit having a card-type printed circuit board that is inserted and held by selecting one of the plurality of guide units, a plurality of cartridge unit insertion holes for mounting the cartridge unit, and the cartridge unit An electronic unit, comprising: a motherboard case having a connector arranged at a position connectable to a connector portion of a card type printed circuit board incorporated in a cartridge unit mounted in the insertion hole. 2. The electronic unit according to claim 1, wherein the connector portions respectively provided on the plurality of card-type printed circuit boards are eccentric in the lateral width direction of the card-type printed circuit boards. 3. The electronic unit according to claim 1, wherein the guide means provided at a plurality of locations inside each unit case have different mutual intervals.