JPH0610311Y2 - Combined ion electrode - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a composite ion electrode in which an inner electrode of a glass electrode and an inner electrode of a reference electrode are integrated.

[Conventional technology]

As shown in FIG. 4, as the composite ion electrode described above,
The lead wires 33, 34 each having a glass electrode inner pole 31 and a reference electrode inner pole 32 formed at the lower end are inserted into the glass electrode chambers 35, 36 for enclosing the internal liquid, which are partitioned from each other, and the respective leads are also provided. The upper ends of the electrode chambers 35 and 36 are glass-sealed in a state where the upper ends of the wires 33 and 34 are pulled out upward from the electrode chambers 35 and 36, and the cable-side lead wires are attached to the respective upper ends of the lead wires 33 and 34. 3
Some have soldered 7,38.

In addition, 39 and 40 in the figure are joined to the temperature compensating electrode 4 by joining the lower ends.
1 is a lead wire for temperature compensation formed with the lead wire 39,
Although lead wires 42 and 43 on the cable side are also soldered to the upper end of 40, it should be noted that there is also a composite type ion electrode of a type that does not include the temperature compensation electrode 41.

[Problems to be solved by the invention]

However, in the composite ion electrode having the above configuration, the upper end of the lead wire on the electrode side is glass-sealed, and the lead wires 37 and 38 on the cable side are soldered to this, which requires a troublesome and troublesome work and is high in cost. Moreover, since the glass electrode line shows a very high internal resistance, the lead wire portion for the inner electrode of the glass electrode on the cable side is joined to the lead wires 33, 37 that are bare for soldering. There was a drawback that the part was susceptible to external inductive noise.

Since the lead wire portion located inside the glass electrode chamber 35 is surrounded and shielded by the liquid inside the reference electrode chamber, there is no fear that the lead wire portion receives external inductive noise.

An object of the present invention is to provide a composite ion electrode in which the above inconveniences are alleviated by rational improvement.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a lead wire having a glass electrode inner pole and a reference electrode inner pole formed at the lower end, with the upper end of each lead wire being pulled out above the internal liquid sealing member. While being inserted into the electrode chambers for filling the internal liquid, which are partitioned from each other, the upper ends of the lead wires on the glass electrode side are located below the internal liquid level of the reference electrode chamber, while being connected to the lead wires on each electrode side. A connector socket is joined to each lead wire on the cable side, and the upper end of the lead wire on the electrode side is used as a connector pin to connect the connector socket to the upper end of the lead wire, and a lead for the glass electrode inner pole on the cable side. The line is characterized in that it is conductively coated over a region below the internal liquid level of the reference electrode chamber.

[Action]

According to the above characteristic configuration, the composite ion electrode is configured by connecting the connector socket of the cable-side lead wire to the upper end of the electrode-side lead wire formed as the connector pin.

On the other hand, the upper end of the lead wire on the inner electrode side of the glass electrode is positioned below the internal liquid level of the reference electrode chamber, and the lead wire on the cable side with respect to the inner electrode of the glass electrode is electrically conductively coated. The line can be protected from external noise.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. First
The figure shows a longitudinal sectional view of a partially developed composite ion electrode, and Fig. 2 shows its exploded longitudinal sectional view. FIG. 3 is a cross-sectional view of the composite type ion electrode. In these figures, 1 is a glass electrode support tube, which is a glass electrode chamber 2 and a reference electrode chamber 3 for enclosing the internal liquid, which are partitioned from each other. And the upper end of the glass electrode chamber 2 projects above the upper end of the comparison electrode chamber 3. Reference numeral a is a filter made of, for example, ceramics provided on the lower side of the electrode chamber 3 in the peripheral portion.

4 is a lead wire on which the inner electrode 5 of the glass electrode is formed, and 6
Is a lead wire on which the inner electrode 7 of the reference electrode is formed, each of which consists of a single wire made of silver, for example, about 1 mmφ, and the lower end of which is dipped in a melt of silver / silver chloride Electrodes 5 and 7 are formed.

The lead wire 4 on the side of one glass electrode is inserted into the glass electrode chamber 2 with its upper end immersed in the inside of the glass electrode chamber 2, and the lead wire 6 on the side of the other comparison electrode has its upper end. Is inserted into the reference electrode chamber 3 in a state of protruding from the reference electrode chamber 3.

Reference numerals 8 and 9 are temperature compensating electrode lead wires, which are also made of silver single wires of, for example, about 1 mmφ, and the temperature compensating electrodes 10 are formed by joining their lower ends to each other. And
The lead wires 8 and 9 for the temperature compensating electrodes also have their upper ends projected from the reference electrode chamber 3 and the reference electrode chamber 3
Has been inserted into.

Reference numeral 11 denotes a resin body mounted on the upper side of the support tube 1. An internal liquid sealing member (for example, a rubber bush) 12 is fitted on the upper side of the body 11, and the reference electrode side is provided. The lead wires 6, 8 and 9 on the temperature compensating electrode side and the supporting tube portion 1a forming the glass electrode chamber 2 are drawn out above the internal liquid sealing member 12, respectively, and inside the body 11. A stopper 13 for replenishing the internal liquid is detachably attached to a portion below the liquid sealing member 12.

Reference numeral 14 denotes an internal liquid enclosing member for enclosing the internal liquid in the glass electrode chamber 2, which is composed of a bush 15, a spacer 16 and a silicon rubber 17 filled between them, and is provided at the upper end of the lead wire 4 on the glass electrode side. The glass electrode chamber 2 is provided so as to be pulled out upward.

Reference numeral 18 is a protective cap for fitting and protecting the support tube 1, and a sponge 19 is provided inside the lower end.

Reference numeral 20 denotes a sensor cap fitted to the body 11 for holding the cable harness 21 therethrough, and each lead wire 22 of the cable harness 21 has a lead wire 4, 6, 8, 9 on the electrode side. With the connector pin as the lead wire 4,
Connector socket 23 electrically connected to 6, 8 and 9 ...
Are joined and held.

The lead wire 22 for the inner electrode of the glass electrode of the cable harness 21 is provided with a conductive coating 24 over a region below the internal liquid level of the reference electrode chamber 3.

In the above structure, the protective cap 18 is fitted to the support tube 1, and the lead wire 22 for the inner electrode of the glass electrode on the cable side is inserted into the glass electrode chamber 2 to remove the lead wire 22 on the cable side. The connector socket 23 is electrically connected to the upper end of the lead wire 4 on the glass electrode side, and the remaining connector sockets 23 of the three cable side lead wires 22 ...
Lead wires 6, 8, 9 on the comparison electrode side and the temperature compensation electrode side
Is electrically connected to each of the upper ends of the internal liquid sealing member 12 and the sensor cap 20.
By mounting the sensor cap 20 on the body 11 in a state of being filled with, the so-called composite type ion electrode having the glass electrode inner pole 5 and the reference electrode inner pole 7 integrally formed is produced.

[Effect of device]

As described above, according to the present invention, by connecting the connector socket of the cable-side lead wire to the upper end of the electrode-side lead wire formed as the connector pin, the troublesome glass sealing and soldering work are not required, and the cost is reduced. In addition, it becomes possible to fabricate a composite ion electrode inexpensively and very easily, and moreover, the lead wire on the cable side for the inner electrode of the glass electrode is conducted below the internal liquid level of the reference electrode chamber. By coating, the line of the glass electrode can be reliably protected from external noise.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a partially developed composite ion electrode,
FIG. 2 is an exploded vertical cross-sectional view of the composite ion electrode with a part thereof developed, and FIG. 3 is a cross-sectional view of the composite ion electrode.
FIG. 4 is a vertical sectional view of a conventional composite ion electrode. 2 ... Glass electrode chamber, 3 ... Comparison electrode chamber, 4 ... Glass electrode side lead wire, 5 ... Glass electrode inner pole, 6 ... Comparison electrode side lead wire, 7 ... Comparison electrode inner pole, 12, 14 ...... Internal liquid sealing member, 22 ...... Cable side lead wire, 23 ...... Connector socket.

Claims (1)

[Scope of utility model registration request] 1. A lead wire having a glass electrode inner pole and a reference electrode inner pole, respectively, formed on the lower end of the lead wire, with the upper end of each lead wire being pulled out above the inner liquid encapsulation member. While inserting the lead wire on the glass electrode side, place the upper end of the lead wire on the glass electrode side below the internal liquid level in the reference electrode chamber, and on each lead wire on the cable side that is connected to the lead wire on each electrode side. Join the connector socket,
Also, the upper end of the lead wire on the electrode side is used as a connector pin to connect the connector socket to the upper end of the lead wire, and the lead wire for the electrode inside the glass electrode on the cable side,
A composite type ion electrode having a conductive coating covering a region below the internal liquid level of the reference electrode chamber.