JP2681561B2 - Portable ECG relay connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electrocardiograph, an electrode cord attached to an end of an induction cable led out from an electrocardiograph body and led out from a body surface electrode (living body electrode). The present invention relates to a relay connector for inserting and connecting a cable, and more particularly to a technique for detecting detachment of an electrode cord from the relay connector.

[0002]

2. Description of the Related Art In a portable electrocardiograph, even if a body surface electrode is properly attached to a patient, an electrocardiogram cannot be measured if the connection is broken at a relay connector in the middle.

In the conventional portable electrocardiograph relay connector, the electrocardiograph body is used when the core wire of the electrode cord has a poor contact with the relay connector or is in a non-connected state. The input voltage to the power supply swings to the plus side or the minus side, but when the electrocardiograph body detects the swing of the input voltage, the electrocardiograph body is configured to treat it as "electrode detachment".

[0004]

The relay connector of the conventional portable electrocardiograph has no means for detecting whether or not the core wire of the electrode cord is detached, and the input voltage swings out. At that time, it was not possible to distinguish whether the cause was a defective attachment of the body surface electrode to the patient or a core wire off of the electrode cord from the relay connector.

The present invention was devised in view of such circumstances, and when the core wire of the electrode cord is disengaged from the relay connector, that is, when the lock of the relay connector is disengaged, the problem is solved. It is an object of the present invention to make it possible to clearly detect and detect a defective attachment of a surface electrode.

[0006]

A relay connector for a portable electrocardiograph according to the present invention is attached to an end portion of an induction cable having a plurality of induction wires led out from an electrocardiograph body, and is connected to a body surface electrode. A relay connector for inserting and connecting an electrode cord having a plurality of drawn-out core wires, comprising a lock mechanism capable of switching between a locked state and an unlocked state of a connection state between each induction wire and each core wire. In addition, the guide wires operate in response to the switching operation of the lock mechanism. When the lock mechanism is in a locked state, the guide wires are separated from each other, and when in the unlocked state, the guide wires are in a locked state. Is provided with a lock detection mechanism for short-circuiting each other.

[0007]

When the lock mechanism is in the locked state and the guide wires of the guide cable and the core wires of the electrode cord are locked in the connected state, the lock detection mechanism keeps the guide wires in the separated state. Therefore, if the input voltage swings out in this state, it can be determined that the cause is defective attachment of the body surface electrode to the patient.

Further, when the lock mechanism is in the unlocked state and the connection state of each core wire of the electrode cord to each induction wire of the induction cable is released, the lock detection mechanism short-circuits each induction wire and each induction wire. The same potential is applied to.
Therefore, on the electrocardiograph body side, it can be determined that the electrode cord is disconnected from the relay connector.

Since the short circuit of each induction wire of the induction cable is used to detect the unlocking, it is not necessary to newly add a special signal wire for detection.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a relay connector of a portable electrocardiograph according to the present invention will be described in detail below with reference to the drawings.

FIG. 1A is a sectional view showing the unlocked state of the relay connector of the portable electrocardiograph, and FIG. 1B is a partially cutaway sectional view showing the locked state of the relay connector. Is a perspective view of the whole disassembled state, FIG. 3 is a perspective view of the assembled state, and FIG. 4 is a plan view.

From the outside, the lower cabinet 2, the upper cabinet 4, the lock slider 6, the transparent plastic connecting sheath 8 and the lock switch button 10 are visible.

A printed circuit board 12 is sandwiched between the lower cabinet 2 and the upper cabinet 4. On one end side of the printed circuit board 12, four guide wires 14a of a cabtire cable 14 which is a guide cable derived from an electrocardiograph body (not shown) are soldered to the land of the print pattern. These four guide wires 14a are of a two-guide type, and all four are made of shielded wires, and the whole is bundled and further shielded. Two of the four are ground lines.

On the other end of the printed circuit board 12, four contact pins 16 are fixed in a penetrating manner while being connected to the land of the printer pattern. The tips of these contact pins 16 are processed into a sharp conical shape. The upper cabinet 4 is formed with holes 4a through which the four contact pins 16 pass. The cabtire cable 14 is fixed to the upper cabinet 4 by a cable fixing bracket 18, bolts 20 and nuts 22.
The cable fixing member 18 is fitted in the semicircular recess 2 a of the lower cabinet 2.

The four contact pins 16 are passed through the holes 4a of the upper cabinet 4 and the cabtire cable 14 is attached.
Is fixed to the upper cabinet 4 by the cable fixing bracket 18, the printed circuit board 12 is attached to the lower cabinet 2.
Is mounted on the lower cabinet 2 and the upper cabinet 4 so that the printed circuit board 12 is covered with the lower cabinet 2 and the upper cabinet 4 by one screw 24 at the center and four screws 26 at the corners. 4 and 4 are clamped and fixed. The screw 24 at the center penetrates the printed circuit board 12, but the screws 26 at the corners are screwed directly to the upper cabinet 4.

A recess 4b is formed in the center of the upper surface of the upper cabinet 4, and a connecting sheath 8 is fitted into the recess 4b. One end of the connecting sheath 8 is pivotally supported by a pin 28. A longitudinal insertion hole 8a for inserting the end portion of the electrode cord 30 having four core wires 30a derived from a body surface electrode (biomedical electrode) (not shown) into the connection sheath 8 and the above four Four insertion holes 8b for inserting the contact pin 16 into the insertion hole 8a at substantially right angles are formed. A compression spring 32 penetrating the upper cabinet 4 is provided between the lower cabinet 2 and the connection sheath 8.
And the connection sheath 8 is urged upward by the compression spring 32.

The upper cabinet 4 is fitted with a lock slider 6 slidably fitted on the left and right side surfaces from above. When the lock slider 6 is in the retracted position as shown in FIG. 1A, the force of pushing down the connecting sheath 8 against the compression spring 32 is weak, and the connecting sheath 8 is freed by the urging force of the compression spring 32. The side is in a tilted posture. The sharp tip of each contact pin 16 is separated from each core wire 30a of the electrode cord 30 and is in a non-connected state. Therefore, each core wire 30 a is also in a non-connection state with each guide wire 14 a of the cabtire cable 14.

When the lock slider 6 is advanced as shown in FIG. 1B, the lock slider 6 pushes down the connecting sheath 8 against the compression spring 32. Accordingly, the sharp tip of each contact pin 16 passes through the insertion hole 8b and the insertion hole 8a.
Electrode cord 3 inserted into the insertion hole 8a
The insulation coating of each core wire 30a of 0 is broken, and the core wire 30a is in direct contact with and electrically connected to each core wire 30a. Each contact pin 16 is connected to each guide wire 14 a of the cabtire cable 14 via the printed pattern on the printed circuit board 12.
As a result, the core wires 30a and the guide wires 14a are connected to each other. Further, the lock slider 6 locks the connected state.

Contrary to the above, when the lock slider 6 is retracted to the state shown in FIG. 1A, the compression spring 32
The connecting sheath 8 tilts upward due to the biasing force of the contact pin 1
The locked state of the connection between 6 and the core wire 30a is released.

That is, the lock slider 6, the connecting sheath 8,
The lock mechanism A is configured to switch the connection state of the compression spring 32 and the like to each core wire 30a between the locked state and the unlocked state.

Lower cabinet 2 with screws 24 and 26
When the upper cabinet 4 and the upper cabinet 4 are fastened and fixed, the lock switch button 10 is inserted therein.
The lock switch button 10 is fitted in the vertical through hole 4c of the upper cabinet 4 so as to be vertically slidable, and is prevented from coming out upward by the left and right stopper pieces 10a. A switch contact 34 is integrally joined to the lower portion of the lock switch button 10. A compression spring 36 that urges the switch contact 34 away from the printed circuit board 12 is interposed between the lock switch button 10 and the printed circuit board 12.

The switch contact 34 is separated from the printed circuit board 12 by the urging force of the compression spring 36.
This is when the lock slider 6 in the lock mechanism A advances and is in the locked state as shown in FIG. At this time, since the rear end of the lock slider 6 moves forward of the lock switch button 10, the switch contact 34 moves upward together with the lock switch button 10 by the compression spring 36.

When the locked state of FIG. 1B is switched to the unlocked state of FIG. 1A by retracting the lock slider 6, the lower surface of the lock slider 6 pushes the lock switch button 10 downward. Then, the switch contact 34 moves downward against the compression spring 36 and comes into contact with the printed circuit board 12. In order to make this operation smooth, the upper surface of the lock switch button 10 is formed into a smooth curved surface. At this time, the position where the switch contact 34 comes into contact with the printed circuit board 12 is a position where the two guide wires 14a of the cabtire cable 14 are short-circuited to each other in the printed pattern of the printed circuit board 12.

As described above, the lock switch button 10, the switch contact 34, and the compression spring 36 respond to the switching operation of the lock slider 6 in the lock mechanism A, and the lock mechanism A is in the locked state of FIG. 1B. When the lock mechanism A is in the unlocked state of FIG. 1A, the lock detecting mechanism B is configured to short-circuit the two guide wires 14a to each other. .

In the locked state shown in FIG. 1B, if the voltage input to the electrocardiograph body via the cabtire cable 14 is cut off, the cause is the body surface electrode for the patient. It can be determined that the attachment state of is defective.

In the unlocked state shown in FIG. 1A, the electrocardiograph body can determine that both lead wires 14a have the same potential due to a short circuit between the two lead wires 14a. It can be seen that there is a defect in the electrical connection state with the electrode cord 30.

No special signal line is provided for detecting the unlocked state, and the existing guide line 14a of the cabtire cable 14 is used as it is, so that the cable wiring is performed. Does not have to be complicated.

[0028]

As described above, according to the present invention, when the electrode cord comes off from the relay connector without adding a dedicated signal line for unlocking detection, the fact that the body surface electrode is attached It can be detected in a state in which it is clearly distinguished from defective attachment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an unlocked state and a locked state of a relay connector of a portable electrocardiograph according to an embodiment of the present invention.

FIG. 2 is a perspective view of the relay connector of the embodiment in an exploded state.

FIG. 3 is a perspective view of an assembled state of the relay connector of the embodiment.

FIG. 4 is a plan view of the relay connector of the embodiment.

[Explanation of symbols]

 A lock mechanism B lock detection mechanism 2 lower cabinet 4 upper cabinet 6 lock slider 8 connection sheath 10 lock switch button 12 printed circuit board 14 cabtyre cable (induction cable) 14a induction wire 16 contact pin 30 electrode cord 30a core wire 32 compression spring 34 Switch contact 36 Compression spring

Claims (1)

(57) [Claims] 1. A relay connector which is attached to an end portion of an induction cable having a plurality of induction wires derived from an electrocardiograph body, and which is inserted and connected with an electrode cord having a plurality of core wires derived from a body surface electrode. A lock mechanism that is switchable between a locked state and a unlocked state of the connection between the guide wires and the core wires, and operates in response to the switching operation of the lock mechanism. A portable core comprising a lock detecting mechanism for keeping the guide wires in a separated state from each other when the lock mechanism is in a locked state and short-circuiting the guide wires to each other in a unlocked state. Relay connector for electricity meter.