JPS5942393B2 - electrical connections - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical connection body that can reliably detect insertion and ejection of a cassette.

Generally, a cassette having a plurality of electrical terminals is inserted into a cassette holder having a plurality of electrical terminals corresponding to the electrical terminals, respectively, and constitutes an electrical connection body that connects the respective electrical terminals. As this electrical connection body, for example, the first
Some devices are constructed of a cassette-type magnetic bubble memory device as shown in the figure and a cassette holder into which it is inserted. To briefly explain this, a cassette 1, which is a cassette-type bubble memory device incorporating a known magnetic bubble memory device, is attached to the rear upper surface with the contact surfaces of a plurality of electrical terminals 2 exposed. are connected to the magnetic bubble memory device in the cassette 1 as required.
On the other hand, the cassette holder 3 includes a cylindrical cassette case 4 that holds the cassette 1 in a freely insertable and removable manner, and a connector 6 to which a plurality of fixed electrical terminals 5 are attached. However, the cassette case 4 has bosses 4a provided on both left and right walls that are pivotally supported by the main body 7 of the cassette holder 3 and are rotatable, and are always urged to rotate clockwise by a torsion coil spring 8. ing. Further, below the cassette holder main body T, the cassette case 4 is rotated counterclockwise and its electrical terminals 2 are provided.
A lock lever 10 is provided which engages with a protrusion 9 provided below the cassette case 4 to maintain this state when the cassette holder and the electrical terminal 5 of the cassette holder come into contact. This lock lever 10 is always urged in the direction of arrow P by a spring (not shown), and when the force setting case 4 is rotated, it is pushed back against the spring by the protrusion 9 of the force setting case as shown in FIG. Rotten. In such an electrical connection body, insertion of the force set is detected using a signal generated by contact between the electric terminal 2 of the force set 1 and the electric terminal 5 of the force set holder 3 as an insertion detection signal.

Therefore, as shown in the time chart of FIG. 3, the force set insertion operation time T of the force set insertion signal. Since the control circuit recognizes the insertion and starts operation before the insertion is completed, there are disadvantages in that data transfer is not performed accurately and data in the power set may be destroyed by the medium. Further, the ejection is detected by detecting the movement of the eject lever 10 for releasing the lock lever 10 using a photocoupler, but in this case, there is a drawback that the cost is high. The present invention has been devised to remedy these drawbacks. Therefore, in the present invention, a cylindrical force set case is provided which accommodates the force set in a removable manner and is pivotally supported at substantially the center of both walls of the cylindrical force set case so as to be able to make contact with the electric terminal of the cassette. An electrical connection body in which a cassette holder body is provided with an electrical terminal, a spring that biases the force setting case in a direction in which the electrical terminal is separated, and a lock lever that holds the force setting case in the force setting inserted state, The cassette holder body is provided with a first switch that is activated by the rotation of the force setting case, and a second switch that is activated by the rotation of the force setting case and the release operation of the lock lever. A NOR circuit in which switch 1 is connected to the input terminal, and
The output terminal of the OR circuit and the second switch are connected to CL.
It is composed of a flip-flop circuit connected to the CK terminal, and a NOR circuit whose input terminals are connected to the Q terminal and the second switch of the flip-flop circuit. 1
A force set insertion/removal detection circuit is provided which sends out a force set insertion signal by sequentially inputting the 0N signal of the first switch and the 0FF signal of the second switch, and sends out the eject signal by the ON signal of the second switch. It is characterized by: Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

Examples are shown in FIGS. 4 and 5.

In the figure, the same parts as in FIG. 1 are designated by the same reference numerals. In this embodiment, as shown in FIGS. 4 and 5, the electrical connection body shown in FIG. The first switch SWl and the force setting case 4
A second switch SW2 which becomes 0N by pressing the protrusion 10a or the lever 15 by the rotation of the lock lever 10 and the release operation of the lock lever 10 is added, and a force setting insertion/removal detection circuit as shown in FIG. has been established. Referring to FIG. 6, 11 and 12 are NOR circuits, and 13 is a flip-flop circuit. One input terminal 11a of the NOR circuit 11 is connected to a 5V power supply and a first switch SWl with one end grounded, and the other input terminal 11
b is connected to a 5V power supply, a power set with one end grounded, and the electrical terminals 2 and 5 of the cassette holder body. Furthermore, the flip-flop circuit 13 connects its CL terminal to a NOR
The CK terminal is connected to the output terminal 11c of the circuit 11, the CK terminal is connected to the second switch SW2 and one input terminal 12a of the NOR circuit 12, and the Q terminal is connected to the other input terminal 12 of the NOR circuit 12.
connected to b. And flip-flop circuit 13Q
) A force set insertion signal is obtained from the Q terminal, and an inject signal is obtained from the output terminal 12c of the NOR circuit 12. The operation of this embodiment configured in this way will be explained next using FIGS. 4 to 7.

When the force set 1 is not inserted into the force set case 4, the force set case 4 is in an inclined state as shown in FIG.
Switch SWl and electrical terminal 5 of the cassette holder body
is set to 0FF. Therefore, the NOR circuit 11 in FIG.
Since the input terminals 11a and 11b of the circuit are both "H", its output terminal 11c is 6L", and the CL terminal of the flip-flop circuit 13 is set to "L". Therefore, the Q terminal is set to "L". When the cassette opening is inserted into the force setting case 4 and the force setting case 4 begins to rotate counterclockwise, the rotary lever 10 is pressed by the protrusion 9 of the force setting case and moves in the direction of arrow R, and the protrusion 10a presses the lever 15, turns the second switch SW2 ON, grounds the power supply, and sets the CK terminal of the flip-flop circuit 13 to ``L'' (FIG. 7, part a).

Next, as shown in Fig. 5, the force set 1 and the cassette holder body 7 are
When electrical terminals 2 and 5 are connected, the power supply is grounded and NOR
The input terminal 11b of the circuit 11 becomes 1L゜゛ (Fig. 7b)
Department). At the same time, the protrusion 9 of the force setting case 4 presses the lever 14, turning the first switch SWl 0N and setting the input terminal 11a of the NOR circuit 11 to ``L'' (part c in Figure 7).
The output terminal 11c of the R circuit 11 becomes 1H, and the CL terminal of the flip-flop circuit 13 becomes 0H. But C
Since the K terminal is “L”, the Q terminal remains “L”,
The force set insertion signal is not output. Next, the lock lever 10 moves in the direction of arrow P so as to lock the force setting case 4 (the lock lever 10 is always urged in the direction P by the spring).

) When it returns to its original position, the protrusion 10a releases the pressure on the lever 15, so that the second switch SW2 becomes OFF, and the CK terminal of the flip-flop circuit 13 in FIG. 6 becomes "H" (FIG. 7, part d). The flip-flop circuit 13 is already CL
Since the terminal is also set to "H", the Q terminal becomes "H" (Q terminal is set to "L") and sends out a force set insertion signal (section e in Fig. 7). At this time, contact between the cassette opening and the electrical terminals 2 and 5 of the cassette holder body 7 has been completed, and even if the control circuit starts operating, the memory of the memory element in the power set may be destroyed or the data may be transferred incorrectly. There is no such thing as that. When ejecting force set 1, first the lock lever 10 shown in FIG. 5 is operated in the direction of arrow Q.

As a result, the second switch SW2 becomes ON. Therefore, the input terminal 12a of the NOR circuit shown in FIG. 6 becomes L2'.
As a result, the two input terminals 12a and 1 of the NOR circuit 12
2b becomes "L", and its output terminal 12c becomes "H" and sends out the input signal (section f in Fig. 7).At the time this signal is output, the electricity of the force set 1 and the cassette holder body 7 is low. Since terminals 2 and 5 are connected at the end, even if the control circuit recognizes the eject signal and stops its operation, the memory of the bubble memory element in force set 1 will not be destroyed. 1's withdrawal is the 4th
The force setting case 4 is rotated and tilted as shown in the figure. As explained above, the electrical connection body of the present invention prevents the memory of the bubble memory element in the force set from being destroyed and also ensures accurate transfer of information by providing a switch that is activated by the insertion/insertion operation of the force set. This makes it possible to reduce the cost since expensive parts such as photocouplers are not used.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams for explaining a conventional electrical connection body, Figure 3 is a time diagram of each signal when inserting and removing a force set in the conventional electric connection body, and Figures 4 and 2 are diagrams illustrating a conventional electrical connection body. FIG. 5 is an explanatory diagram for explaining the electrical connection body of the embodiment according to the present invention, and FIG.
The figure is a circuit diagram showing an example of the circuit of the electrical connection body according to the present invention, and FIG. 7 is a time diagram of each signal during force setting insertion and removal of the electrical connection body according to the present invention. 1...Force set, 2...Force set electrical terminal, 3...Force set holder, 4...
Force set case, 5...Electric terminal of force set holder, 6...Connector, 7...Cassette holder body, 8...Spring, 9... ...Protrusion of force set case, 10...Lock lever, S
Wl...First switch, SW2...
Second switch, 11, 12...NOR circuit,
13...Flip-flop circuit.

Claims (1)

[Claims] 1. A cylindrical cassette case that removably accommodates a cassette and is pivotally supported at approximately the center of both walls of the cassette case, an electrical terminal provided so as to be able to contact the electrical terminal of the cassette, and a cassette case. A first switch that is activated by rotation of the cassette case, the electrical connection body including a spring that biases the electrical terminal in a direction to separate the electrical terminal, and a lock lever that holds the cassette case in the cassette inserted state, which are disposed in the cassette holder main body. and a second switch activated by the rotation of the cassette case and the release operation of the lock lever, the N switch is provided in the cassette holder body, and the electrical terminal of the cassette holder body and the first switch are connected to the input terminal.
An OR circuit, a flip-flop circuit in which the output terminal and the second switch of the NOR circuit are connected to the CL and CK terminals, respectively, and a NOR circuit in which the @Q@ terminal and the second switch of the flip-flop circuit are connected to the input terminals. The circuit consists of an ON signal between the electrical terminal of the cassette and the electrical terminal of the cassette holder body, an ON signal of the first switch, and a second switch.
An electrical connection body comprising a cassette insertion/removal detection circuit which sends out a cassette insertion signal when the OFF signals of the first switch are sequentially inputted, and sends out the ejection signal when the ON signal of the second switch is turned on.