JPH05335763A - Active-board slot-out preventive apparatus - Google Patents

Abstract

PURPOSE:To prevent a circuit board from slipping out when the board is in an active state, by providing a slip-out preventive member capable of projecting and drawing back on a sliding path of a shelf. CONSTITUTION:When a rotary-type electric magnet 26 is connected to the electricity, a slip-out preventive member 29 is turned upward with arms 21 and 28 from a fictitious line to a full line, meanwhile each tongued member 30 passing an angular hole 22 stops snugly in a groove 11 of a circuit board 8. In this state, the circuit board 8 is not pulled out from the shelf 5 unless the rotary-type electric magnet 26 is disconnected from the electricity, and the slip-out preventive member 29 falls spontaneously on the fictitious line so that the member 29 is drawn back. Moreover, the power supply of the rotary- type electric magnet 26 is linked with a switch of a backboard 16, and thereby the circuit board 8 can not be drawn out unless the backboard 8 is disconnected from the electricity. Consequently, the printed board has no fear of slip-out when the board is in an active state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing the active insertion / removal of a plurality of circuit boards, which are accommodated in a shell for accommodating a plurality of circuit boards.

A circuit board made of a printed board has a plug-in connector at its tip, and a shell that accommodates a large number of this circuit board has a plug-in connector corresponding to the plug-in connector of the printed board therein.
Corresponding to this, many guides for inserting the printed board are provided.

The connector can be inserted and connected (plug-in connection) to the plug-in connector of the backboard by inserting the above-mentioned circuit board with the connector at the top along with the guide of the shelves.

The backboard is composed of a printed board and has a circuit connection between a plurality of circuit boards, a connection with an external circuit and a power supply function by a circuit pattern formed on the printed board.

The above-mentioned circuit board is generally allowed to be plugged in only at a specific connectable portion with respect to the connector of the backboard, but with respect to a circuit board commonly used in general, the compatibility within a predetermined range. Is recognized.

However, when the circuit board is inserted / removed (inserted / removed) in a so-called active state in which power is supplied to the backboard, a sudden rush connection or interruption of the power source occurs, so that such an electrical connection occurs. Insertion / extraction in a power supply (active) state should be prohibited because circuit parts vulnerable to physical shock, such as IC and LSI, may be damaged or destroyed.

Therefore, it is necessary to take protective measures so that the circuit board is not directly inserted or removed in such an active state.

[0008]

2. Description of the Related Art A protection circuit is provided as a protection measure against insertion / removal in an active state, that is, against active insertion / removal, but it is necessary to provide such a circuit for each circuit board. If the protection circuit is provided in this way, insertion / removal in an active state is possible.

On the other hand, in the mechanical construction, in order to avoid insertion and mounting at an incorrect position, mechanical obstacles are provided on both the shelves and the circuit board side, and only the matched ones can be inserted by this combination. However, this cannot prevent insertion / removal in the active state in the matching portion of a specific combination.

Further, in order to prevent the circuit boards that are actively connected in the plug-in connection state from being inadvertently pulled out, mechanical locking means is provided for each circuit board, or
There is no choice but to install a barb-shaped locking means or a front cover plate on the front of the shelves for locking all at once.

[0011]

Providing the above protection circuit on each circuit board requires a space for the circuit board, which is not suitable for high-density mounting, and a complicated control circuit is expensive. There is a point.

[0012] There are problems that it is impossible to prevent insertion in an active state by mechanical means, and there is a problem that extraction can be arbitrarily performed. If a means for preventing the withdrawal is provided, there is a problem that the blocking means has to be attached and detached each time. In any case, a means for each insertion and removal is required, and the attachment and detachment operation of this is troublesome.

In view of the above problems of the prior art, the present invention aims to prevent the circuit board from being inserted or removed in the active state, and to prevent the circuit board from being inserted or removed in the active state. It is an object of the invention that it can be realized by only one device. Further, it includes preventing activation in a state where different circuit boards are inserted into a specific position, and enabling activation by detecting an activatable state.

[0014]

The gist of the construction of an active insertion / extraction prevention device of the present invention for solving the above problems is as follows.

According to the preferred first aspect, a plurality of circuit boards having a plug-in connector at an end portion in the insertion direction and a groove capable of receiving the insertion / removal prevention member on a side surface and a plug-in connector inside are provided. A shelf that has a plurality of guides in the insertion direction so as to correspond to the backboard, and accommodates the plurality of circuit boards in a predetermined position in the guides in a parallel state and freely inserted and removed, and on a passage of the circuit board of the sheerf. An insertion / removal prevention member which is provided so as to be retractable and which prevents any arbitrary insertion / removal of the circuit board in a protruding state,
Consists of.

Further, according to the second aspect, the insertion / removal preventing member is provided on the passages of the plurality of circuit boards so as to be able to collectively project and retract, and is applied to the first aspect. In addition, according to the third aspect, it is applied to the first or second aspect that the insertion / removal prevention member is set at a position before the state where the plug-in connector is connected.

According to the fourth aspect, the insertion / removal prevention member and the groove of the circuit board are positioned such that they can be received only in a specific combination in the state where the plug-in connector is connected. In addition, it is provided with a detection means for detecting that the insertion / removal prevention member is received in the groove of the circuit board, and power is supplied to the circuit board by being detected by the detection means. Is applied to the first to third aspects.

Further, according to the fifth aspect, it is applied to the first to fourth aspects that the insertion / withdrawal prevention member is moved in and out of the passage of the circuit board by the driving force of the electromagnet.

[0019]

The function of the present invention is as follows. That is, according to the first aspect, the insertion / removal prevention member can be activated in the projecting state into the shelves, and in this state, the circuit board cannot be inserted into the sheerf by the insertion / removal prevention member and is blocked. It Further, the inserted circuit board is locked by the blocking member and is prevented from being pulled out.

According to the second aspect, since the insertion / removal preventing member is not allowed to be retracted in and out of each circuit board but is collectively retracted and retracted, the driving means is simplified and the control is easy.

According to the third aspect, even if an attempt is made to insert the circuit board in the activated state, the circuit board is blocked at the position where the plug-in connector is not connected and is blocked by the insertion / removal prevention member. ..

According to the fourth aspect, since the insertion / removal preventing member is received in a specific relationship with the circuit board, it can be activated by the detecting means only in this state, and the insertion / removal preventing member can be prevented from being inserted in a different circuit board. The member is unacceptable and cannot be activated by the detection means.

According to the fifth aspect, since the insertion / removal prevention member is driven to move in and out by the driving force of the electromagnet, it is reliable and can be obtained according to various aspects.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-described activation device prevention device of the present invention will be described in detail below with reference to the drawings based on a concrete embodiment based on the constitution.

FIG. 1 is an external perspective view of an electronic / communication device. A pair of left and right pillar parts 1, 1 and an upper and lower connecting member 2,
3 and 3, a frame-shaped frame 4 is formed, and the shelves 5 are attached to the column portions 1 and 1 in 6 columns in a row with 6 screws each. Guides are provided in the shell 5 so as to face each other in the vertical direction, and the circuit boards 8 made of a large number of printed boards are inserted in parallel in the guides.

FIG. 2 is a perspective view of an embodiment of the active insertion / extraction prevention device according to the present invention, and is shown in a state where the left side plate of the shelves 5 is broken and removed. The movable part of the active insertion / extraction prevention device is in a separated state. This part is shown assembled in the side cross-sectional view of the partial cross-section of FIG.

The circuit board 8 has a plug-in connector 10 at the front end in the insertion direction indicated by the arrow, and has a groove 11 on the lower side surface for receiving the insertion / removal prevention member. A backboard 16 having a plug-in connector 15 inside is attached to the vertical surface on the back side of the shell 5 and has a plurality of guides 18 in the insertion direction corresponding to the plug-in connector 15. The circuit board 8 is removably inserted into the housing 18 and accommodated therein.

As shown in the perspective view of the partial cross section of FIG. 4, the guide 18 has an oval hole 1 formed in the upper and lower plates of the shell 5.
A large number of grooves 9 are formed in the front-rear and left-right directions at predetermined intervals by drawing toward the inside, and parallel groove-shaped portions 20 having the left-right intervals are formed in the guide 18 by receiving the thickness of the circuit board 8. There is. Therefore, the groove-shaped portion 20 is set on a straight line in the front-rear direction.

By inserting and inserting the circuit board 8 in the guide 18, the connector 15 of the circuit board 8 is automatically guided and set in the connector 15 of the backboard 16 and plug-in inserted and connected.

Between the front and rear guides 18, 18, the plate portion without the guide portion is the passage 21 (FIG. 4) of the circuit board 8,
Square holes 22 into which the insertion / extraction prevention member enters are formed in the passage 21 in the respective lateral directions.

L-shaped arms 27 and 28 are attached to both sides of a penetrating shaft of a rotary electromagnet (rotary solenoid) 26 attached to a mounting member 25, and an insertion / extraction prevention member 29 is caulked at its tip. It is attached by means.

The insertion / removal prevention member 29 is Z-shaped when viewed from the side, and has arms 27 and 28 attached to one side thereof, and the other side is adjusted to the distance between the guides 18 with the tongue pieces 30 that can be inserted into the square holes 22, respectively. Are formed in large numbers.

As shown in FIG. 3, the fitting 25 is attached and fixed to the lower surface of the shell 5 with screws (not shown). Reference numeral 31 is a support fitting that supports the lower position of the insertion / removal prevention member 29.

The operation of the above-described structure will be described. When the rotary electromagnet 26 is energized and operated by a power source (not shown) through a switch, it is rotated about an axis and the arms 27 and 28 are rotated.
At the same time, the insertion / extraction prevention member 29 is rotated from the position indicated by the imaginary line to the position indicated by the solid line, and rises.

Each tongue piece 30 is a square hole 22 of the shelf.
The groove 1 of the circuit board 8 that has been inserted into the shelf through the
1. Projected into 1 and received. In this state, the circuit board 8 cannot be pulled out from the shelf 5. In order to pull it out, the rotation type electromagnet 26 is de-energized, and the insertion / extraction blocking member 29 is naturally pulled down to the position of the imaginary line by gravity to retract it.

The power supply of the rotary electromagnet 26 is interlocked with the power supply to the backboard 16 so that the circuit board 8 cannot be pulled out unless the power supply to the backboard 16 is cut off. That is, pulling out in the active state is surely prevented.

Therefore, even if the circuit board 8 is to be inserted into a position where the back board 16 is not energized while being energized, the tongue piece 30 of the insertion / removal prevention member 29 causes the passage board 21 to move.
Since it projects upward, the tip portion of the circuit board 8 abuts against it and cannot be inserted any further, preventing plug-in connection of the connector. The insertion and connection can be performed by once cutting off the power supply and retracting the insertion / removal prevention member 29. That is, insertion / removal of the circuit board with the backboard 16 in the active state is prevented.

A large number of tongue pieces 30 of the insertion / withdrawal prevention member 29 are provided corresponding to each of the circuit boards 8 and are not collectively controlled by the respective tongue pieces 30, but one shelves 5 at a time.
Since one insertion / withdrawal prevention member 29 is inserted into and removed from all the circuit boards 8 to prevent active insertion / withdrawal, it is easy to control the power supply. That is, the rotary electromagnet 26
The current can be supplied to the backboard 16 by a parallel supply circuit.

A second embodiment of the present invention will be described below with reference to the side view of FIG. The same parts as those in FIG. 2 are designated by the same reference numerals. As shown in FIG. 5, an electromagnet 35 of a straight advancing type is attached to the side surface of the shell 5 in an upward direction.

The suction movable member of the electromagnet 35 is linked to the side surface of the insertion / extraction prevention member 37 arranged on the lower surface of the shell 5 by a connecting member 38. The rear side of the insertion / removal prevention member 37 is rotatably supported by the side plate of the shelf 5 on the shaft support 3.
It has been nine.

As is clear from the perspective view shown in FIG. 6, the insertion / removal prevention member 37 shown in FIG. 5 has an L-shaped bent 40 on the front surface, and a tongue piece 41 is formed on the upper portion thereof. The front side fold 40 and the rear side fold (FIG. 5) 42 provide the overall reinforcement.

The holes 43 on the rear side of the holes on both sides are holes for supporting the shaft 39 with the shell 5 and the holes 44 on the front side are holes for linking with the connecting member 38. The four square holes 45 on the plane are holes for weight reduction and ventilation.

According to this embodiment, the space occupied on the back surface of the shelves 5 is not required, and the vicinity of the tongue piece 41 is attracted by the electromagnet 35, so that it is possible to operate with a small and low power electromagnet. Moreover, the electromagnets 3 are provided on both sides of the shelf 5.
Since 5 can be arranged, the operation becomes reliable. The heat generated by the electromagnet 35 can be transferred to the shelf 5. The action and operation are almost the same as in the previous embodiment.

FIG. 7 shows a third embodiment of the present invention, but this embodiment is preferably applied to the mode shown in FIG. 5, and therefore only the insertion / removal preventing member is shown in a perspective view. From the above, the insertion / removal prevention member 5 shown in FIG.
0 is basically the same as in FIG. 6, but the adjacent tongue piece 51
Are stepwise in the front-rear direction at predetermined intervals 51-1, 51-
2, 51-n.

Due to such deviation, the position of the groove 11 on the side surface of the circuit board corresponding to the tongue piece 51 is naturally set to the same relationship. According to the above configuration, the position where the circuit board 8 is inserted is specified, and when the circuit board 8 is inserted in a different position, the position of the groove 11 and the position of the tongue piece 51 do not match.
Will not be accepted by. Figure 8
Will be further described with reference to, the above-mentioned predetermined interval of the present embodiment means such a relationship. Further, it is not limited to the stepwise setting as in the illustrated embodiment, and it is possible to implement it in a zigzag shape, for example.

FIG. 8 is a side view of the essential portions of the fourth embodiment of the present invention, which is basically the same as FIG. In this figure, the side surface of the insertion / extraction prevention member 55 is extended to the outside of the side surface of the sheerf 5,
The operating piece 56 is provided here, and a small pressing operation type switch (micro switch) 57 is arranged so as to be in contact therewith.

By doing so, when all the tongue pieces 59 of the insertion / removal prevention member 55 are received in the groove 11 of the circuit board 8, the contacts inside the switch 57 are closed. If any of the tongues 59 is not received in the groove 11 of the circuit board 8, the insertion / extraction blocking member 55 does not reach the raised position, and the contact of the switch 57 is not closed.

The switch 57 is arranged such that the contact is closed when the insertion / removal prevention member 55 is completely pulled up, and the contact is not closed when the insertion / removal blocking member 55 is not pulled up.

Therefore, by connecting the contacts of the switch 57 to the power supply circuit for the backboard 16 in series, the contacts of the switch 57 cannot be closed when the insertion position of the circuit board 8 is incorrect, and therefore the power supply is not closed. Is not supplied and power is prevented from being supplied in the wrong insertion state. This embodiment is remarkable when applied to the embodiment of FIG.

As described above, the switch 57 has a function of preventing the active insertion / removal as a detection means for erroneous insertion of the circuit board 8 or insertion into the correct position. Of course, by arranging the switch means on both side surfaces of the shell 5, more reliable detection can be performed.

FIG. 9 shows a preferred circuit diagram to which the embodiment of FIG. 8 is applied. Referring to the drawing for this circuit, the plug-in connectors 10 of the circuit board 8 are connected to the plug-in connectors 15 of the backboard 16, respectively. A power supply unit 60 made of a similar circuit board is also plugged in. A manual switch 61 having a breaker function is provided on the front surface of the power supply unit 60, and can be manually operated.

An external power source 63 is connected to the switch 57 attached to the side surface of the shell 5 and the backboard 16, and one of them is a manual switch of the power supply unit 60 via the switch 57 and the backboard 16. 61
Power is supplied to the circuit boards 8 and 8 via the manual switch 61.

Since the connection is made in this way, even if the manual switch 61 is closed, no power is supplied unless the side switch 57 is closed. This means that the tongue piece 59 of the insertion / removal preventing member 55 must be entirely received in the groove 11 of the circuit board 8, and the contact of the switch 57 is closed by the actuating piece 56 on the outside of the side surface of the power supply. Can be supplied.

That is, this is extremely characteristic when applied to the embodiment in which the specific circuit board shown in FIG. 7 is inserted at a predetermined position of the shell 5. Thus, it has both sides of prevention of erroneous insertion and active insertion / removal.

In FIG. 9, reference numeral 65 is a display element 65 for displaying the open / closed state of the switch 57,
Even if the manual switch 61 is closed, the light emitting element of the display element 65 is turned on in a state where the switch 57 is opened, or the sounding element emits a sound to give an alarm, and the insertion is not erroneous insertion or reliable insertion. Let me know.
Therefore, it can be confirmed that the power is not supplied only by turning on the manual switch 61.

The state of FIG. 10 shows a state in which the circuit board 8 is erroneously inserted into the shelves 5, and although the connectors 10 and 15 are connected to each other, the position of the tongue 71 of the insertion / removal preventing member 70 is different from that of the tongue 71. It is well shown that the grooves 11 of the circuit board 8 do not reach, that is, they do not match due to incorrect insertion. Therefore, the power supply is prevented by the combination with the circuits of FIGS.
Circuit protection is achieved.

In the state shown in FIG. 11, the insertion / removal prevention member 70 is pulled up, and the backboard 16 is active. When attempting to insert the circuit board 8 in this state, the tip 73 of the circuit board 8 contacts the tongue piece 71, and further insertion is blocked. That is, insertion connection in the active state is prevented.

As is apparent from FIG. 11, it is important that the insertion position of the tongue piece 71 into the shell 5 is set to a position before the state where both connectors 10 and 15 are connected. By doing so, the active connection of the circuit board 8 is blocked. This applies to all embodiments.

A fifth embodiment of the present invention is shown in the side view of FIG. In this embodiment, on both sides of a rotary arm 81 whose center is pivotally supported 80 on the side surface of the shell 5, linking members 83, 85 linked at equal distances are linked with insertion / extraction prevention members 87, 89 provided above and below. I have joined.

Further, a straight advancing attraction type electromagnet 90 is linked downward to one of the outer sides thereof, and a tension coil spring 91 for returning is arranged on the other side of the outer side. A combination of these is arranged in the same state on the other side surface of the shelf 5.

According to this embodiment, the insertion / removal preventing members 87, 89 which are a combination of the upper and lower sides of the circuit board 8 and the grooves 11, 11 of the circuit board 8 are arranged so that the combination of the insertion / removal preventing members shown in FIG. By incorporating it, more combinations of erroneous insertion prevention structures can be obtained. Of course, FIG. 8 and FIG.
It is also applicable to adopt the circuit protection of.

The application of the coil spring 91 for returning is necessary to ensure the return of the insertion / removal preventing members 87, 89, but it is not necessary to use such a returning spring. Can be applied to the previous embodiment of.

The present invention is not limited to the above-mentioned respective embodiments, and any combination of the respective embodiments can be applied and includes them. Needless to say, the functions and effects obtained thereby can be further expanded. ..

[0064]

As described above in detail, according to the active insertion / extraction prevention device of the present invention, the insertion / extraction prevention member is projected in the passage of the circuit board of the shelves so that the insertion / removal prevention member can be retracted, so that the circuit in the activated state is formed. The circuit protection of the circuit board is achieved because it is possible to prevent the board from being arbitrarily inserted and removed.

Since the insertion / removal preventing member is configured to collectively prevent insertion / removal from a large number of circuit boards per shelf, control is easy and the structure is simple.

Since the insertion / removal preventing member prevents the insertion of the circuit board at the position before the connector of the circuit board and the connector of the backboard are connected, the insertion of the circuit board in the active state is prevented, so that the circuit board is not inserted. Circuit protection is achieved.

Since the circuit board can receive the insertion / removal prevention member only at a specific portion, erroneous insertion of the circuit board is prevented, and this is detected and displayed by the detection means, so that confirmation can be obtained and the circuit board can be activated. Insertion / removal is prevented.

Since the driving of the insertion / removal prevention member is an electromagnet,
The driving time is extremely short, instantaneous, and reliable.
At the time of return, the drive force is released and the drive is restored naturally and does not require electric power.

As described above, the present invention exerts various excellent effects when applied to an electronic / communication device or the like, and the practical effect brought to the circuit protection is extremely remarkable.

[Brief description of drawings]

FIG. 1 is an external perspective view of an electronic / communication device.

FIG. 2 is a perspective view showing a separated state of an embodiment of the present invention.

FIG. 3 is a side sectional view of an essential part in an assembled state of FIG.

FIG. 4 is a partial sectional perspective view for explaining a guide.

FIG. 5 is a side view of the second embodiment of the present invention.

6 is a perspective view of the insertion / extraction prevention member shown in FIG.

FIG. 7 is a perspective view of an insertion / removal prevention member according to a third embodiment of the present invention.

FIG. 8 is a side view of the essential portions of the fourth embodiment of the present invention.

9 is a preferred circuit diagram to which the embodiment of FIG. 8 is applied.

FIG. 10 shows a state in which the circuit board is erroneously inserted.

FIG. 11 is an explanatory diagram showing that the circuit board is not inserted and connected in the active state.

FIG. 12 is a fifth embodiment of the present invention.

[Explanation of symbols]

 4 Frame 5 Shelf 8 Circuit board 10, 15 Plug-in connector 16 Backboard 18 Guide 21 Passage 22 Square hole 26 Rotating electromagnet 29 Insertion / removal prevention member 30 Tongue piece 31 Supporting metal 35 Straight advancing electromagnet 37 Insertion / removal prevention member 40 L-shaped bending 41 Tongue piece 50 Insertion / removal prevention member 51 Tongue piece 55 Insertion / extraction prevention member 56 Actuating piece 57 Switch 59 Tongue piece 60 Power supply unit 61 Manual switch 63 External power terminal 65 Display element 70 Insertion / removal prevention member 71 Tongue piece 80 Spindle 81 rotation arm 83,85 connecting member 87,89 insertion / extraction prevention member 90 rectilinear attraction type electromagnet 91 coil spring for return

Claims (5)

[Claims] 1. A plug-in connector (10) is provided at an end portion in the insertion direction, and an insertion / removal prevention member (2) is provided on a side surface.
9) A plurality of circuit boards (8) having a groove (11) capable of receiving them, and a plurality of guides (18) in an insertion direction corresponding to a backboard (16) having a plug-in connector (15) therein. ) For accommodating the plurality of circuit boards (8) in parallel and insertably / removably at predetermined positions of the guide, and a passage (21) of the circuit board (8) of the sheerf (5). ) An insertion / withdrawal prevention member (29) which is provided on the top surface of the circuit board (8) so that the circuit board (8) can be inserted or withdrawn in a protruding state. 2. The active insertion / removal according to claim 1, wherein the insertion / removal prevention member (29) is provided on the passages (21) of the plurality of circuit boards (8) so that the insertion / removal can be collectively performed. Prevention device. 3. The insertion / withdrawal prevention member (70) according to claim 1 or 2, wherein the insertion / removal prevention member (70) is set to a position before the plug-in connector (10) (15) is connected. Active insertion / withdrawal prevention device. 4. The plug-in connector (10) between the insertion / removal prevention member (50) and the groove (11) of the circuit board (8).
In the connected state of (15), the mutual positions are positioned so that they can be received only in a specific combination relationship, and the insertion / extraction blocking member (50) is placed in the groove (11) of the circuit board (8). Detection means for detecting acceptance (5
7. The method according to any one of claims 1 to 3, further comprising 7), wherein power is supplied to the circuit board (8) upon detection by the detection means (57). Active insertion / withdrawal prevention device. 5. The driving force of an electromagnet (26) for retracting the insertion / extraction prevention member (29) onto the passage (21) of the circuit board (8). The insertion / extraction prevention device according to any one of 1.