JP3269974B2 - Card type electronic circuit module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a card-type electronic circuit module.

[0002]

2. Description of the Related Art In recent years, a card-type electronic circuit module in which a CPU and its peripheral circuits are housed in a card-type case has been widely used in many electronic devices including on-vehicle electronic devices such as a car navigation system. .

[0003] Such a card type electronic circuit module is CP
Taking a U-card as an example, an arithmetic unit and a peripheral circuit such as a memory are already configured in the card, so that there is a convenience that a computer function can be provided only by plugging in a target device, but a system is provided. Has the disadvantage of poor expandability.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a card-type electronic circuit module which can be expanded by mounting various module boards. I do.

[0005]

SUMMARY OF THE INVENTION The above object according to the present invention, the mounting substrate 1 on which the circuit module is configured not covered by the cover member 2, and the plug-in card connector 3 exposed from the cover body 2 a card-type electronic circuit module can be connected with expansion module board 4 Te, the heat absorption
The part 50 contacts the high heat generating element 10 on the mounting board 1 and radiates heat.
The heat sink 5 having the portion 51 exposed on the cover body 2 is provided.
Then, the heat radiating part 51 is exposed at one side edge of the cover body 2.
Of the additional module board 4 in the center of the upper surface of the cover 2
Along with forming the storage area 6, water
The extension module board 4 mounted in a flat posture is stored
This is achieved by providing a card-type electronic circuit module housed in area 6 .

[0006] In the present invention, the card-type electronic circuit module includes a mounting board 1 on which circuit elements are mounted, a cover 2,
Alternatively, it refers to a circuit module that is used by being connected to another circuit module via a connector or the like and covered with an outer constituent member such as a frame, and an open-air circuit module in which circuit elements are mounted on a mounting board such as a printed board. Not included.

The card-type electronic circuit module includes a card connector 3 mounted on the mounting board 1 for connecting an additional module board 4. At least the fitting portion 30 of the card connector 3 is exposed from the surface of the cover 2, and the card type electronic circuit module can be easily expanded by plug-in connection of the additional module board 4 to the fitting portion 30. It is possible. Further, since the elements on the mounting substrate 1 are covered with the cover body 2, it is possible to prevent unnecessarily coming into contact with other conductors and also prevent intrusion of dust and the like.

[0008] The expansion module board 4, may be used various ones depending on the application, it is possible to connect a memory module highly necessary normal most expanded.

The extension module board 4 can be mounted in a vertical position with respect to the cover 2, but when mounted in a horizontal position along the cover 2, the mounting height can be reduced. Becomes

[0010] In a horizontal mounting, when the cooling of the highly exothermic element 10 on the mounting board 1 by the heat sink 5 is required, the heat radiation portion 51 of the heat sink 5 is exposed to the one side edge portion of the cover member 2 cover member The storage area 6 for the additional module board 4 may be formed in the center of the upper surface of the second module 2, and the additional module board 4 may be stored in the storage area 6.

Furthermore, inserting the opposite edge of the thermal unit 51 release Expansion module board 4, Zunawachi, card connector 3
In the case where it is arranged near the edge facing the insertion side edge, the edge opposite to the insertion is prevented from being caught by another member adjacent thereto and detached from the card connection connector 3.

[0012] In addition, the card connector 3 lead 31
Is covered with the cover body 2, it is possible to prevent the lead 31 from coming into contact with other adjacent members.

[0013]

1 and 2 show an embodiment of the present invention. In the drawing, reference numeral 2 denotes a cover body which forms an outer shell of the card type circuit module in cooperation with the frame 7, and reference numeral 70 denotes a back cover body, which is formed of a thin plate material such as stainless steel.
Reference numeral 4 denotes a memory module (expansion module board), which is configured by mounting a plurality of memory elements 41, 41,. In this embodiment, the case where a memory module is used as the additional module board 4 is shown, but another module can be used.

A mounting board 1 on which a CPU chip 10 (high heat-generating element) and its peripheral circuit elements (not shown) are mounted is housed inside a card type circuit module surrounded by an outer package, and is mounted on one edge of the mounting board 1. Plug-in connection is made to the device housing via the connected connector 11. In FIG. 2, reference numeral 12 denotes a chip carrier for mounting the CPU chip 10 on the mounting substrate 1.

In order to cool the CPU chip 10 which generates a large amount of heat, a heat sink 5 is provided in the card type circuit module.
Is arranged. The heat sink 5 is formed of a material having good heat conductivity such as aluminum, and includes a heat absorbing portion 50 bonded to a heat sink surface of the CPU chip with a heat transfer adhesive, and a heat radiating portion 51 exposed to the outside from the cover 2. In order to secure a storage area 6 for the memory module 4 to be described later in the center of the cover 2, the heat radiating portion 51 is arranged at the edge on the side where the connector 11 is mounted, and is arranged at the center of the mounting board 1. The heat absorbing portion 50 corresponding to the CPU chip 10 and the heat radiating portion 51 at the edge are connected by a heat transfer portion 52 inserted through the card type circuit module.

On the other hand, a card connector 3 is fixed to an edge of the mounting board 1 facing the side where the connector 11 is mounted. The card connection connector 3 has a housing formed in a U-shape in plan view by projecting guide pieces 33, 33 from both ends of the card fitting piece 32, and a free end of the guide piece 33 has a memory module 4. Is integrally formed with a lock portion 33a for resiliently locking the side edge of the lock. The card connector 3 is disposed so as to be exposed above the cover 2 from an opening formed in the cover 2. The card fitting piece 32 of the card connector 3 is connected to the heat radiating portion 51 of the heat sink 5.
And a space is formed between the heat radiating portion 51 and the card fitting piece 32 such that the memory module 4 can be stored therein.

The card fitting piece 32 is provided with a fitting part 30 which opens toward the heat radiating part 51 of the heat sink 5 and in which a plurality of contacts are arranged in an array. The lead 31 having the above-mentioned contact formed at the tip is drawn out to the back of the card fitting piece 32 and then bent downward to be connected to the pattern on the mounting board 1. The contact inside the fitting part 30 will be described later. The memory module 4 is formed to bend vertically so that the memory module 4 can be inserted obliquely from above. Further, the back surface 32a and the ceiling 32b of the card fitting piece 32 are covered with cut-and-raised pieces that have been cut and raised when forming the opening of the cover body 2, and the card connector 3 when the memory module 4 is inserted. By reducing the load on the leads 31 and covering the leads 31 exposed on the back surface of the card fitting piece 32, abnormal contact between the leads 31 and other components is prevented.

Therefore, in this embodiment, when additional memory is required, the desired memory module 4 is connected to the terminal 42 forming side edge by the fitting portion of the card connector 3 as shown in FIG. After being inserted obliquely from above (arrow A direction), it is pushed down (arrow B direction).
When the memory module 4 is pressed down, the side edge of the notch 43 formed on the side edge of the memory module 4 interferes with the lock portion 33a and pushes the lock portion 33a to the side to be set at a predetermined position. The lock portion 33a returns to the original position by the elastic restoring force, and
Is prevented from falling off. By attaching the memory module 4 to the card connector 3, the memory element on the memory module 4 is connected to the circuit module on the mounting board 1,
Memory expansion is performed.

In the above example, a so-called CPU card having the function of a microcomputer as a whole card has been described, but the present invention is also applicable to a circuit module having another function.

[0020]

As is apparent from the above description, according to the present invention, an extension module board can be easily added, so that expandability can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing the present invention.

2A is a cross-sectional view of FIG. 1, wherein FIG. 2A is a cross-sectional view taken along line II of FIG. 1 in a state where an additional module board is mounted, and FIG. 2B is a cross-sectional view illustrating a method of mounting the additional module board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting board 10 High heat generation element 2 Cover body 3 Card connector 4 Expansion module board 5 Heat sink 50 Heat absorption part 51 Heat radiation part 6 Storage area

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 3/00 G06F 1/16 G06F 15/02

Claims (2)

(57) [Claims] 1. A mounting substrate on which the circuit module is configured not covered by the cover body, the card-type collector connectable expansion modules board plugs into the card connector exposed from said cover body
In the sub-circuit module, the heat-absorbing part contacts the high heat-generating element on the mounting board,
A cover body having a heat sink exposed on the bar body and exposing the heat radiating portion to one side edge of the cover body;
Storage area for additional module board is formed in the center of the upper surface of the
Extension module that is mounted horizontally along the cover
A card-type electronic circuit module having a board stored in the storage area . 2. The heat radiating portion of the heat sink is an extension module.
The card-type electronic circuit module according to claim 1, wherein the card-type electronic circuit module is arranged near an insertion opposite edge of the board.