JP2003108970A - Card type electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card type electronic apparatus capable of increasing the rigidity of a card case for improving the bending strength and torsional strength and protecting an electronic part. SOLUTION: This card type electronic apparatus comprising a circuit board 14, on which the electronic parts 15a, 15b, and 15c are mounted, and the flat card case 11 having a housing part for housing the electronic parts and the circuit board, is characterized in that, on the inside face of the card case 11, a projection part 16 protruding in the circuit board 14 direction is arranged, and the tip part of the projection part 16 is brought close to or brought into contact with the circuit board 14 while avoiding the electronic parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a card-type electronic device such as a (Secure Digital) card.

[0002]

2. Description of the Related Art SD (Sec) used as an information recording medium for multimedia equipment such as portable computers, mobile phones, music players, and digital cameras these days.
ureDigital) cards are becoming smaller and smaller in recent years.
Thinning is progressing.

For example, as disclosed in Japanese Patent Laid-Open No. 2001-175834, there is known a card-type electronic device having a sandwich structure in which a circuit board having electronic components mounted on both sides is sandwiched and fixed by a pair of upper and lower cases.

FIG. 6 shows a conventional card type electronic device,
Reference numeral 1 denotes a card case formed of a synthetic resin material such as a polycarbonate resin or an ABS resin in a flat rectangular shape, and includes a top case 2 and a bottom case 3. A circuit board 5 having electronic components 4a, 4b, 4c such as a controller and a memory mounted on both sides is housed inside the card case 1. Therefore, the recesses 6 are formed on the inner surfaces of the upper case 2 and the lower case 3 so as not to contact the electronic components 4.
Are formed.

The card case 1 is thin and small, for example, the long side is 32 mm, the short side is 24 mm, and the thickness is 1.4 mm. The upper case 2 and the lower case 3 are electronic components 4a, 4b, 4c. Since the concave portion 6 is formed so as not to come into contact with, it is ultrathin.

[0006]

As described above, the card case is made of a synthetic resin material such as polycarbonate resin, ABS resin, etc., and is small in size and ultra-thin. When bending force, twisting force or drop impact is applied, a crack occurs in the card case,
Cracks and defects are likely to occur, which may damage expensive electronic components inside.

The present invention has been made in view of the above circumstances. The purpose of the present invention is to increase the strength of the card case, and to increase the bending force, the twisting force,
An object of the present invention is to provide a card-type electronic device that can prevent peeling, cracking, chipping, and the like even when a drop impact is applied and can protect expensive electronic components inside.

[0008]

In order to achieve the above-mentioned object, the present invention is a card type electronic device comprising a circuit board on which electronic parts are mounted and a flat card case for accommodating the electronic parts and the circuit board. In the above-mentioned, the card case is provided with a convex portion projecting toward the circuit board, and a tip portion of the convex portion approaches or contacts the circuit board while avoiding the electronic component.

Further, in a card type electronic device comprising a circuit board on which electronic parts are mounted and a card case made of a flat synthetic resin material for accommodating the electronic parts and the circuit board, a top surface inside the card case or It is characterized in that a reinforcing portion integral with the card case is provided at a corner between the bottom surface and the inner side surface continuous with the bottom surface.

According to the above construction, the rigidity of the card case is increased by the convex portion, and when the external force is applied, the convex portion comes into contact with the circuit board to prevent deformation. Further, according to the above structure, the rigidity of the card case is increased by the reinforcing portion, and the bending strength and the torsional strength are also increased.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show a first embodiment, and FIG. 1 shows a card type electronic device used as an information recording medium of a multimedia device such as a portable computer, a mobile phone, a music player and a digital camera. Of S
FIG. 2 is an exploded vertical side view of the D (Secure Digital) card, FIG. 2 is a vertical side view of the assembled card, and FIG. 3 is an internal view of the upper case and a plan view of the circuit board.

In the figure, 11 is a polycarbonate resin, ABS
The card case 11 is formed of a synthetic resin material such as a resin into a flat rectangular shape, and is formed thin and small with a long side of 32 mm, a short side of 24 mm, and a thickness of 1.4 mm, for example.

The card case 11 comprises an upper case 12 and a lower case 13, and a circuit board 14 is housed inside the card case 11. The printed wiring is provided on the circuit board 14, and electronic components 15a, 1 such as a controller and a memory are provided on both surfaces of the circuit board 14.
5b and 15c are mounted.

Further, a recess 12a is provided on the inner surface of the upper case 12 so as not to contact the electronic components 15a and 15b, and a recess 13a is provided at the lower case 13 so as not to contact the electronic component 15c.

The upper case 12 is provided on the inner surface of the recess 12a of the upper case 12 and on the portion 14a of the circuit board 14 which does not face the electronic components 15a and 15b, that is, between the electronic components 15a and 15b. Convex part 16
Is provided. The protrusion 16 is a protrusion having a rectangular cross section and is continuous in the width direction of the upper case 12. The tip portion 16a of the convex portion 16 is a flat surface, and the circuit board 14
When the upper case 12 is fitted to the
The height a is set so as to approach or contact the portion 14a of the circuit board 14 that does not face the electronic components 15a and 15b.

According to the card case 11 thus constructed, the electronic components 15a, 15b, 15c such as the controller and the memory mounted on the circuit board 14 are the upper case 1.
2 and the lower case 13 are covered and protected.
Moreover, since the convex portion 16 is integrally provided on the upper case 12, the bending rigidity and the torsional rigidity of the upper case 12 are improved. Furthermore, when an external force is applied downward from the upper portion of the upper case 12, the tip end portion 16 a of the convex portion 16 contacts the circuit board 14. Therefore, the convex portion 16 can prevent the upper case 12 from being deformed, can prevent the card case 11 from being cracked or chipped, and the expensive electronic components 15a, 15b, 15c can be prevented.
Can be protected.

In the first embodiment, the convex portion 1
6 is a ridge having a rectangular cross section and is provided continuously in the width direction of the upper case 12. However, due to the arrangement of the electronic components 15a and 15b mounted on the circuit board 14, the ridge that is continuous in the longitudinal direction of the upper case 12 is formed. The convex portion 16 may be provided. further,
The protrusion 16 is not limited to the upper case 12 and may be provided in the lower case 13.

Further, the shape of the convex portion 16 is a convex portion 17 having an inverted triangular cross section as shown in FIG. 4A, and a rectangular cross section as shown in FIG. The tapered convex portion 18 may be used. By thus forming the tapered shape like the convex portions 17 and 18, even when a dimensional error occurs during molding of the card case 11, when the tip end portions of the convex portions 17 and 18 come into contact with the circuit board 14, Since it is crushed, dimensional error can be absorbed.

Further, the shape of the convex portion 16 is not limited to a continuous convex strip, and as shown in FIG. 4C, the convex portion 1 having a plurality of protrusions on the inner surface of the upper case 12 or the lower case 13 is formed.
The same effect can be obtained by providing 9 as well.

FIG. 5 shows a second embodiment and is a vertical sectional side view of a card as a card type electronic device. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Upper case 1 constituting the card case 11
2 and the top surface 20 and bottom surface 2 inside the lower case 13
A reinforcing portion 24 integral with the card case 11 is provided at a corner portion 23 between 1 and a continuous inner side surface 22. The reinforcing portion 24 has a substantially triangular cross section and may be provided on the entire inner circumference of the card case 11 or may be provided partially.

In this way, the card case 11 has a reinforcing portion 24.
By providing the card case 11, the mechanical strength of the outer peripheral portion of the card case 11 is increased, and the card case 1
Bending rigidity and torsional rigidity of 1 are improved, and card case 1
1 is expensive and can prevent deformation, cracking, chipping, etc.
5a, 15b, 15c can be protected.

[0024]

As described above, according to the present invention, the protrusion improves the rigidity of the card case, and when the external force is applied, the protrusion contacts the circuit board to prevent deformation. The rigidity of the case is improved, the bending strength and the torsional strength are improved, and the electronic parts can be protected.

Further, by providing the reinforcing portions at the corners of the card case, the rigidity of the card case is increased, the bending strength and the torsional strength are increased, and the electronic parts can be protected.

[Brief description of drawings]

FIG. 1 is an exploded vertical sectional side view of a card according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the card in the assembled state according to the embodiment.

FIG. 3 is an internal view of an upper case and a plan view of a circuit board of the same embodiment.

FIG. 4 shows a modified example of the same embodiment, (a) and (b) are sectional views of a convex portion, and (c) is an inner view of an upper case.

FIG. 5 is a vertical sectional side view of the card in the assembled state according to the second embodiment of the present invention.

FIG. 6 is a vertical sectional side view of a conventional card in an assembled state.

[Explanation of symbols] 11 ... Card case 12 ... Upper case 13 ... Lower case 14 ... Circuit board 15a to 15c ... Electronic components 16 ... Convex part 24 ... Reinforcement part

Claims (7)

[Claims] 1. A card-type electronic device comprising a circuit board on which an electronic component is mounted and a flat card case for accommodating the electronic component and the circuit board, wherein a protrusion protruding toward the circuit board is provided on an inner surface of the card case. A card-type electronic device, wherein a portion is provided, and a tip portion of the convex portion is brought close to or in contact with the circuit board while avoiding the electronic component. 2. The card-type electronic device according to claim 1, wherein the card case is made of a synthetic resin material, and the protrusion is formed integrally with the card case. 3. The card-type electronic device according to claim 1, wherein the convex portion is a convex strip that is continuous in the width direction or the length direction of the card case or a convex strip that intersects with the card case. 4. The card type electronic device according to claim 1, wherein the convex portion is a plurality of columnar protrusions protruding to the inner surface of the card case. 5. The card type electronic device according to claim 1, wherein a tip portion of the convex portion has a tapered shape. 6. A card-type electronic device comprising a circuit board on which electronic components are mounted and a card case made of a flat synthetic resin material for accommodating the electronic components and the circuit board, wherein a top surface inside the card case or A card-type electronic device, characterized in that a reinforcing portion integral with the card case is provided at a corner between a bottom surface and an inner side surface continuous with the bottom surface. 7. The card type electronic device according to claim 6, wherein the reinforcing portion is provided continuously or discontinuously at a corner portion inside the card case.