KR20070035421A - Memory card socket structure - Google Patents

Abstract

In order to obtain a memory card holding structure which can improve the supporting rigidity and the supporting strength of the spring guide and can reduce the number of assembly steps, the base end portion 11a of the spring guide 11 is embedded in the contact block 7 to be integrated. At the same time, the proximal end 11b is projected from the contact block 7 so that the proximal end 10d of the contact terminal 10 can be soldered to the circuit board 21 for soldering.

Description

Memory Card Retention Structure {MEMORY CARD SOCKET STRUCTURE}

 1 is a perspective view of a memory card holding structure according to the first embodiment of the present invention.

 Fig. 2 is a perspective view of the memory card holding structure according to the first embodiment of the present invention, showing a state in which a memory card is inserted;

 3 is an exploded perspective view of a memory card holding structure according to the first embodiment of the present invention;

 4 is a plan view in a state where the shell cover of the memory card holding structure according to the first embodiment of the present invention is removed, showing a state before the memory card is mounted;

 Fig. 5 is a plan view in a state where the shell cover of the memory card holding structure according to the first embodiment of the present invention is removed, showing a state in which a memory card is mounted;

 6 is a plan view of a contact block to which a plurality of contact terminals and a spring guide of a memory card holding structure according to the first embodiment of the present invention are fixed;

 Fig. 7 is a perspective view of the contact block on which the plurality of contact terminals and the spring guide of the memory card holding structure according to the first embodiment of the present invention are fixed, from the bottom side;

Explanation of symbols for the main parts of the drawings

One… Memory card retention structure 1a... Card receiver

1b... Inserting port 4.. Shell member

5... Slider 5e... Insertion hole (concave)

7... Contact block 8... Coil spring

10... Contact terminal 11.. Spring guide

11b... End (joint) 20.. Memory card

21... Circuit board

The present invention relates to a memory card holding structure.

Recently, a memory card holding structure for inserting and detaching a small storage medium (hereinafter referred to as a memory card) such as a mini SD memory card (registered trademark) in various electronic devices such as a digital camera or a mobile phone is installed. The thing which I attached increases.

In this kind of memory card holding structure, each contact is made to each terminal (I / O contact surface) of the memory card, with the memory card being inserted into a card receiving portion formed in a case of a memory card, which is typically fixed on the electronic device side. A plurality of contact terminals (contacts) are provided, and transmission and reception of various data and signals are performed between the memory card and the electronic device via these contact terminals.

In such a memory card holding structure, a slider is provided in the card accommodating portion to move back and forth with the insertion and withdrawal of the memory card, and a coil spring for applying the slider to the insertion port side of the card accommodating portion is provided to take out the memory card. In this case, the memory card is extruded through the slider.

At this time, a rod-shaped spring guide is inserted and passed through the winding inside of the coil spring, and the spring guide aims at positioning of the coil spring and suppression of buckling (see Patent Document 1, for example).

[Patent Document 1] Japanese Patent Laid-Open No. 2004-119182 (4 pages, Fig. 4)

However, in the conventional structure, when assembling the spring guide separately from the case, the front end side of the spring guide is inserted into the coil spring, and the collar formed on the proximal side is engaged with the cutout formed on the plate of the case. It is configured to.

That is, the fixing of the spring guide is performed only by engaging the cutting part of the plate via the collar part, making it difficult to set the support strength of the spring guide largely and assembling the spring guide during assembly. There existed a problem that water purification increased and productivity worsened.

Therefore, an object of the present invention is to obtain a memory card holding structure which can improve the supporting rigidity and the supporting strength of the spring guide and can reduce the number of assembly steps.

According to a first aspect of the present invention, there is provided a shell member including a card accommodating portion for removably inserting and detaching a memory card, a contact block provided on an inner side of the card accommodating portion, and fixed to the contact block. The terminal is protruded into contact with the terminal of the memory card, while the proximal end thereof is joined to the circuit board, and the advancing movement between the insertion port side and the inner side in the card accommodating part is accompanied by insertion and removal of the memory card. And a coil spring pressurizing the slider to the insertion opening side of the card receiving portion, and a spring guide fixed to the contact block, extending toward the insertion opening, and inserted into and passed through the winding of the coil spring. To join the circuit board to the proximal end of the spring guide. It is characterized by providing one junction.

In the second aspect of the present invention, the slider is formed with a recess for inserting the spring guide, and the tip portion of the spring insertion side of the spring guide is inserted into the recess in a state where the slider is located at the insertion port side of the card receiving portion. It is characterized by one.

According to the first aspect of the present invention, since the spring guide is integrated into the contact block, it is not necessary to process it alone as a separate part, so that the number of parts can be reduced, and the assembly of the memory card holding structure is further facilitated. It is easier and faster to execute, thereby reducing the number of assembly processes and improving productivity.

In addition, by integrating the spring guide into the contact block, the supporting rigidity and the supporting strength of the spring guide can be increased, and the other end of the spring guide can be joined to the circuit board by soldering or the like. There is an advantage that it is possible to further increase the support rigidity and the support strength.

According to the second aspect of the present invention, in the state where the slider is positioned on the insertion port side of the card receiving portion, the tip end portion of the insertion port side of the spring guide is inserted into the recess formed in the slider, regardless of the advance and retreat position of the slider. Since the whole coil spring can be guided by at least one of a spring guide and a recessed part, buckling of a coil spring can be suppressed more reliably, and a slider movement can be performed more smoothly.

Hereinafter, embodiments of the present invention will be described in detail with the drawings.

1 to 6 show a first embodiment of the memory card holding structure according to the present invention, Fig. 1 is a perspective view of the memory card holding structure, and Fig. 2 is a perspective view of the memory card holding structure with the memory card inserted. 3 is an exploded perspective view of the memory card holding structure.

4 and 5 are plan views of the memory card holding structure with the shell cover removed showing the state in which the memory card is inserted in order, Fig. 6 is a plan view of the contact block fixing the contact terminals, and Fig. 7 is the contact terminal. It is a bottom perspective view which shows the state which soldered the circuit board to the front-end | tip of the base end.

The memory card holding structure 1 according to the present embodiment is mounted on an electronic device or the like (not shown) and functions as a socket for inserting and detaching the memory card 20 in a removable manner. In the state where the memory card 20 is mounted, the terminals (electrodes; not shown) formed on the surface or the rear surface of the memory card 20 and the contact terminals 10 provided on the memory card holding structure 1 are brought into contact with each other. Thus, data and signals can be transferred between the electronic device and the memory card 20.

In addition, the memory card holding structure 1 inserts and pushes the memory card 20 into the card receiving portion 1a as a recess from the insertion opening (inlet and opening) 1b. Is locked in the attached state, and the lock is released by pushing it again, so that the memory card 20 has a so-called push-on / push-off function that protrudes from the insertion opening 1b of the card housing portion 1a.

The memory card holding structure 1 is basically a case consisting of a flat rectangular tube shape having an elongated strip-shaped insertion opening 1b formed on one side (front surface), and an insertion opening 1b in the card receiving portion 1a of the case. A slider 5 which is supported to move back and forth between the < RTI ID = 0.0 >) < / RTI > and inner side, a coil spring 8 as a pressurizing mechanism that applies the slider 5 to the insertion opening 1b side within the card receiving portion 1a, The contact block 7 provided in the inner side of the card accommodating part 1a, and the several contact terminal 10 fixed to the said contact block 7 are comprised.

That is, in the memory card holding structure 1, the closed end surface is formed by the base shell 2 and the cover shell 3 which are formed of a conductive metal plate such as stainless steel and are disposed opposite to the front and back directions of the memory card 20. The shell member 4 with which it is provided is formed, and the card accommodating part 1a which accommodates the memory card 20 so that insertion and removal is possible by the closed end surface of the said shell member 4 is formed. In the present embodiment, the base shell 2 and the cover shell 3 are formed of a metal material, thereby securing the rigidity and strength of the case and using the conductive material as ground (earth).

The base shell 2 has a substantially square base wall portion 2a, and bends a pair of opposing pairs of widthwise end edges of the base wall portion 2a at approximately right angles to sidewalls 2b and 2c having a substantially constant height. And the flat cross section is formed in U shape as a whole.

Of the pair of side walls 2b and 2c, the edge portion of the base wall portion 2a is erected at an end portion of the side wall 2c insertion port 1b side of one side (the far side in FIG. 3), and the slider 5 is inserted into the insertion port. A stopper 2d is formed to prevent falling from (1b), and the base wall portion 2a is provided with a claw portion 2e and a memory card 20 for insertion and withdrawal of the claw portion 2e for attaching the contact block 7 to each other. A projection bar 2f extending along the direction is provided.

On the other hand, as shown in FIG. 3, the cover shell 3 has a substantially square flat plate shape that is the same shape as the base wall portion 2a of the base shell 2 by a metal plate such as stainless steel as in the base shell 2. The cover shell 3 is formed with spring structures 3a and 3b for pressing the memory card 20 and spring structures 3c for pressing the pin 6 described later.

Then, the cover shell 3 is mounted on the upright ends of the side walls 2b and 2c of the base shell 2, and is joined between the cover shell 3 and the base shell 2 by joining them by laser welding or the like. The card accommodating part 1a which becomes a flat closed cross section in this is formed.

The slider 5 is coupled to the protruding bar 2f provided in the base shell 2 by the recess 5a formed in the slider 5, so that the side wall 2c on one side (far side in FIG. 3) is provided. To move forward and back. The slider 5 is provided with a locking portion 5b suitable for the stepped portion 20a (see Fig. 4) at the one side edge of the memory card 20, and at the same time as the insertion direction than the stepped portion 20a. A projection 5c is formed to engage with the cutout 20b (see Fig. 4) of the memory card 20 formed on the opposite side.

Therefore, when the memory card 20 is inserted into the card receiving portion 1a from the insertion opening 1b of the memory card holding structure 1, the memory card 20 encounters the stepped portion 20a against the locking portion 5b. Simultaneously with the needle, the notch 20b engages with the protrusion 5c, so that the inside of the card accommodating portion 1a can be moved forward and backward while the memory card 20 is held by the slider 5.

The slider 5 has a pin 6 whose one end 6a is rotatably supported by the engaging hole 7a of the contact block 7 and the other end 6b of the pin 6 in a predetermined path. The card accommodating portion 1a is provided between the guide portion 5d and the coil spring 8 interposed between the slider 5 and the contact block 7 and forcing the slider 5 to the insertion opening 1b. Position within is regulated.

An appropriate step is provided on the bottom of the groove 5d, and the other end 6b of the pin 6 is pushed on the side wall of the groove 5d by a pressing force of the coil spring 8 or a force pushing the memory card 20. By hitting the bottom wall of the groove portion 5d by the spring structure 3c provided in the cover shell 3, the other end 6b of the pin 6 is defined without being reversed at least in any section. A path that leads in the forward direction is formed.

Then, a part of the insertion port 1b side of the groove portion 5d is formed into a substantially heart shape in plan view to form a so-called heart cam mechanism, and the push-on / push-off function of the memory card 20 described above is implemented. .

The contact block 7 has an inner wall portion 7b and a side wall portion 7c in which the insulating resin is formed in a substantially L-shape with a planar view of the insulating resin, and the inner wall portion 7b has an inner side of the card receiving portion 1a. To the base shell 2, while the side wall portion 7c is disposed along one side wall 2b (just before FIG. 3) of the card receiving portion 1a. It is fixed through.

The inner wall portion 7b is supported by a plurality of contact terminals 10 formed in a rod shape by a conductive metal, and the tip portion 10a of these contact terminals 10 is inserted into the insertion hole 1b from the inner wall portion 7b. Protrudes into the card receiving portion 1a.

The memory card 20 is inserted between the contact terminal 10 and the cover shell 3, and a curved portion that protrudes smoothly in the direction of the cover shell 3 to the tip portion 10a of the contact terminal 10. 10b is formed so that the curved portion 10b faces the base shell 2 of the memory card 20 when the memory card 20 is mounted at a predetermined position on the inner side of the card receiving portion 1a. It contacts with the electrode (terminal of the memory card 20) formed in the lower surface of the figure.

As shown in FIGS. 6 and 7, these contact terminals 10 are embedded in the contact block 7 by embedding the base end portion 10c in the contact block 7 by insert molding. The tip 10d protrudes from the contact block 7 to the side opposite to the card receiving portion 1a (insertion opening 1b of). The tip 10d of each base end 10c is joined to the circuit board 21 (conductive pattern or electrode) by soldering or the like.

3, the movable arm 12 is supported by the cylindrical protrusion 7d protruding from the inner wall part 7b of the contact block 7 so that rotational movement is possible, and the movable arm 12 is carried out. Rotation end portion 12a of () is driven by the end portion of the memory card 20 inserted in a state where a force is applied in the direction of the insertion hole 1b by the torsion spring 13 fitted to the cylindrical projection 7d. The card housing portion 1a is pushed inward.

Therefore, as shown in FIG. 4, in the state where the memory card 20 is not inserted to the mounting position of the inner side of the card accommodating portion 1a, the rotary motion tip 12a of the movable arm 12 is inserted into the insertion opening 1b. 5, the state where the memory card 20 is inserted into the mounting position on the inner side of the card accommodating portion 1a, as shown in FIG. 12a) is located on the inner side of the card receiving portion 1a.

That is, the movable arm 12 rotates between the position of the insertion opening 1b side shown in FIG. 4, and the position of the inner side shown in FIG. 5 with advancement of the memory card 20, and the movable arm 12 When at the position of the insertion opening 1b side, while electrically shorting between the two fixed contacts 14 and 14a fixed to the contact block 7, while the movable arm 12 is at the inner side position, The electrical conduction between the two fixed contacts 14, 14a is interrupted.

Therefore, by detecting the electrical conduction state between the fixed contacts 14 and 14a, it is possible to detect whether the memory card 20 is set at a predetermined position of the memory card holding structure 1.

6 and 7, in this embodiment, a rod-shaped spring guide 11 extending toward the insertion opening 1b side is fixed to the inner wall portion 7b of the contact block 7, and the coil spring ( It is inserted and passed inside the coil of 8 to prevent buckling deformation of the coil spring 8.

The base end 11a of this spring guide 11 is embedded in the contact block 7 and integrated. The spring guide 11 extends toward the insertion opening 1b side (that is, one end side) of the card receiving portion 1a, while the front end portion 11b of the base end portion 11a is moved from the contact block 7 to the card receiving portion ( It protrudes to the opposite side to 1a) (insertion opening 1b of). The tip 11b of the base end 11a is soldered to the circuit board 21 (conductive pattern or electrode). That is, in this embodiment, this front end 11b is corresponded to the junction part for joining to a circuit board.

3 to 5, insertion holes 5e are formed as recesses for inserting the spring guide 11, and the slider 5 shown in FIG. The front end portion 11c of the spring guide 11 is inserted into the insertion hole 5e even in a state located on the insertion port 1b side of (1a), that is, in a non-inserted state of the memory card 20. Such a configuration can be realized by appropriately setting the length L of the spring guide 11, the shape of the slider 5, and the like.

Moreover, the recessed part 5f which accommodates the coil spring 8 is formed in the slider 5, The recessed part 5f is not buckled in the state in which the coil spring 8 shown in FIG. 5 is the most compressed. It is set to the depth accommodated in the. In this embodiment, since the slider 5 abuts on the inner wall portion 7b in this state, the compressed coil spring 8 is completely accommodated in the recess 5f. In such a configuration, the insertion hole 5e of the spring guide 11 extends from the bottom of the recess 5f to the insertion opening 1b side.

According to the present embodiment described above, when the memory card 20 is inserted from the insertion port 1b of the card accommodating portion 1a as shown in FIG. 4, and the memory card 20 is pushed in as shown in FIG. The slider 5 is moved to the inner side of the card accommodating portion 1a while compressing the coil spring 8.

At this time, since the spring guide 11 is inserted and passed through the inside of the winding of the coil spring 8, when the coil spring 8 is compressed, the spring guide 11 is guided and buckling occurs in the coil spring 8. Suppressed. In addition, the recessed part 5f provided in the slider 5 also functions as a guide of the coil spring 8.

In this embodiment, since the base end portion 11a of the spring guide 11 is embedded in the contact block 7 in which the contact terminal 10 is fixed and integrated, the contact block is assembled at the time of assembling the memory card holding structure 1. Since the spring guide 11 can be attached by assembling (7), since the spring guide 11 is integrally molded without being processed as a separate part, the number of parts can be reduced and the assembly can be reduced as compared with the prior art. By reducing the number of steps, productivity can be improved.

In addition, since the spring guide 11 is integrated with the contact block 7, the support rigidity and the support strength of the spring guide 11 can be increased than before, and further, the tip end 11a of the spring guide 11 is further improved. Since 11b can be joined to the circuit board 21 by soldering or the like, there is an advantage that the supporting rigidity and the supporting strength of the spring guide 11 can be further increased.

At this time, as shown in FIG. 7, the front-end | tip 10d of the base-end part 10c of the contact terminal 10, and the front-end | tip 11b of the base end part 11a of the spring guide 11 are arrange | positioned in substantially the same position, and are approximately Since it was set as the same shape, the process of joining the front end 11b of the contact terminal 10 to the circuit board 21, and the process of joining the front end 11b of the spring guide 11 to the circuit board 21 at once is carried out. In the same process, the same operation can be performed, and the work efficiency can be improved.

Further, according to the present embodiment, in the state where the slider 5 is located on the insertion opening 1b side of the card receiving portion 1a, a spring guide is provided in the insertion hole 5e as the recess formed in the slider 5. Since the distal end portion 11c of (11) is inserted, at least one of the spring guide 11 and the insertion hole 5e can be moved to the whole region of the coil spring 8 regardless of the advancement position of the slider 5. It becomes possible to guide, and it is possible to suppress the buckling of the coil spring 8 more reliably, and to move the slider 5 more smoothly.

Incidentally, the present invention has been described with reference to the above embodiments, but various embodiments may be employed without departing from the spirit and scope of the present invention.

According to the present invention, since the spring guide is integrated into the contact block, it is not necessary to process it alone as a separate part, so that the number of parts can be reduced, and the assembling of the memory card holding structure is made easier and more. It can be executed quickly, reducing the number of assembly processes and improving productivity.

In addition, by integrating the spring guide into the contact block, the supporting rigidity and the supporting strength of the spring guide can be increased, and the other end of the spring guide can be joined to the circuit board by soldering or the like. There is an advantage that it is possible to further increase the support rigidity and the support strength.

In addition, since the front end of the spring guide is inserted into the recess formed in the slider in the state where the slider is located at the insertion port side of the card receiving portion, the entire spring of the coil spring is guided regardless of the slider's retracted position. And at least one of the concave portions, the buckling of the coil spring can be suppressed more reliably, and the slider can be moved more smoothly.

Claims (2)

A shell member provided with a card accommodating portion for removably storing the memory card; A contact block provided on an inner side of the card receiving portion; A contact terminal fixed to the contact block and protruding into the card receiving portion to contact the terminal of the memory card, while the proximal end thereof is joined to the circuit board; A slider which moves back and forth between the insertion port side and the inner side in the card accommodating portion with insertion and removal of the memory card; A coil spring for pressing the slider toward the insertion opening side of the card receiving portion; A memory card holding structure having a spring guide fixed to the contact block and extending toward the insertion hole and inserted into and passed through a winding of the coil spring, A joining portion for joining to the circuit board is provided on the proximal end of the spring guide. Memory card retention structure. The method of claim 1, The slider is formed with a recess for inserting the spring guide, and in the state where the slider is located on the insertion port side of the card receiving portion, the front end portion of the corresponding insertion port side of the spring guide is inserted into the recess. Memory card retention structure.

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