JPH028161Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a checker for determining the quality of the contact gap of the contactor of the jack side connector.

(b) Technical background The accuracy of the contact gap between the contacts of the jack-side connector is an important element in order to maintain a specified contact resistance with the contacts of the plug-side connector to be inserted or the contact pattern of the printed circuit board. be. Therefore, after assembling the jack-side connector, it is often inspected to see if the contact gap is within tolerance.

(c) Prior art and problems An example of a jack-side connector is shown in Figure 1. In FIG. 1, A is a sectional view of the connector, and B and C are front views of the contact portion when the contact gap is defective.

In the figure, reference numeral 1 denotes a backboard on which a jack-side connector 2 is arranged in parallel, and a contact portion 12 of a printed board is inserted into the connector 2. The connector 2 has an elongated rectangular parallelepiped molded housing 3.
The housing 3 includes a large number of contact pairs in which a contact 6 and a contact 7 are arranged facing each other in parallel. A slit 4 is provided in the center of the upper surface of the housing 3, into which a contact portion 12 of a printed board is loosely inserted in the longitudinal direction, and a contact portion 4 is provided on both sides of the slit 4 with no printed board inserted into the outer surface of each slit 4. A support portion 5 is provided, to which the tip portions 10 and 11 of the support portions 6 and 7 are opposed and pressed against each other.

The contacts 6 and 7 are made of elastic, good conductor plates (for example, beryllium copper) in the shape of elongated strips, and the lower parts are terminal parts 6' and 7' that are inserted into the holes (or through holes) of the backboard 1, and the upper part is the terminal part 6' and 7'. The bent apex is plated with gold, for example, to become the contact points 8, 9, and the upper tip portion 10,
11 is formed parallel to the terminal portions 6' and 7'.

The upper parts of the terminal parts 6' and 7' of the contacts 6 and 7 are fitted into the holes 3' in the lower part of the housing 3, and the contacts 8 and 9 are close to each other and face each other. The contact 8 and the contact 9 are attached to the housing 3 so as to have a spring force in a direction in which they approach each other. The spacing between the support parts 5 is adjusted so that the gap dimension _d0 between the contacts 8 and 9 is within a predetermined dimension (for example, 0.8±0.1 mm) when the tip parts 10 and 11 are locked to the support parts 5. And the shape of the contactor is specified and manufactured. When the contact portion 12 of the printed board is inserted when this gap is d ₀ , the gap expands against the spring pressure, and a predetermined contact pressure and therefore a predetermined contact resistance are obtained.

The reason why the contact gap deviates from the specified dimension d ₀ is mostly due to the deformation of the tips 10 and 11 of the contacts 6 and 7. This deformation of the tip is mostly due to handling when inserting the contact into the housing.

For example, as shown in FIG. 1B, when the tip of the contactor 7 deforms inward to the tip 9', the upper tip of the tip 9' comes into contact with the support part 5, and the contact gap widens d ₁
becomes. Further, when the tip part deforms outward, it becomes a tip part 9'' as shown _in FIG.

Conventionally, to inspect the contact gap, two types of gap gauges, one on the pass side and one on the stop side, were inserted into the slit 4 of the housing 3.
It is inserted between contacts 8 and 9 for inspection. For example, when d ₀ = 0.8±0.1mm, the thickness of the non-stop side feeler gauge is 0.7mm, and the thickness of the non-stop side feeler gauge is
It is 0.9mm.

However, with such a gap gauge, whether the tip 10 or the tip 11 moves or does not move is determined visually, and there is a problem in that there are many errors in the judgment. .

(d) Purpose of the invention The purpose of the present invention is to provide a contact gap checker that eliminates the above-mentioned conventional problems.

(e) Structure of the device To achieve this objective, the device alternately inserts two types of spacers, one on the pass side and the other on the stop side, between the contacts, and makes contact at predetermined positions on both outsides of the tip of the contact. A pin is inserted, and it is determined whether the contact gap is appropriate or not based on whether or not the tip of the contact is electrically connected to each contact pin. The predetermined position of this contact pin is that when a spacer with a large thickness on the stop side is inserted, the tip of the contact contacts the contact pin, and when a spacer with a small thickness on the pass side is inserted, it makes contact. This is the position where the tip of the child does not touch the contact pin.

(f) Embodiments of the invention Hereinafter, the invention will be described in detail with reference to illustrated embodiments.

Fig. 2 is a partially cutaway perspective view of an insertion tool according to an embodiment of the present invention, A and B in Fig. 3 are cross-sectional views showing the insertion tool installed, and Fig. 4 is an example of a detection circuit. It is. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, 13 indicates a housing 14 and a spacer 1.
6 and a number of contact pins 17 ₁ ... 17 _o , 18 ₁
...It is an insertion tool consisting of 18 _o . The housing 14 has a molded box shape with an open bottom, and the inner dimensions of the open side are slightly larger than the external dimensions of the housing of the connector, so that it can be fitted into the housing from above. A spacer 16 made of a conductor plate that protrudes vertically downward to a desired length on the longitudinal center line of the bottom plate 15 at the top of the housing 14, has a length in the longitudinal direction that is smaller than the length of the slit of the connector, and has a thickness of t. is insert molded. Spacer 16
Desired lead wires are connected to the upper end surface of.
The thickness t of this spacer 16 is determined by whether the two types, one with a dimension on the stop side of the contact gap and one with a dimension on the pass side, are fixed to separate casings, or they are not separate casings but the same casing. It is divided in the center, insulated and fixed.

At predetermined positions on both sides of the spacer 16, contact pins 17 and 18, which are made of thin conductive rods that protrude less than the spacer 16, are fixed vertically to the bottom plate 15 so as to face each other. This predetermined position is the tip of the contact when the insertion tool 13 is inserted into the connector and the spacer 16 ₁ , which has a large thickness on the stop side, is inserted between the contacts and the normal gap d ₀ is reached. is in contact with the spacer 16 ₁ side, and the spacer 16 ₂ is smaller in thickness on the passing side.
When the contactor is inserted, the normal gap d ₀ is a position where the tip of the contactor does not make contact. Such pairs of contact pins 17 and 18 are arranged opposite to the contacts of the connector 17 ₁ , 17 ₂ , . . . 17 _o , 18 ₁ , 18 ₂ .
...18 _o and the number of contacts are arranged in parallel. Also,
Each contact pin 17 ₁ ... 17 _o , 18 ₁ ...
A lead wire is connected to the top of each of the 18 _o .

In Fig. 3A, the stop side spacer 16 ₁
An insertion tool 13 equipped with a connector is inserted into the connector. The spacer 16 ₁ passes through the slit 4 of the housing 3 and is inserted into the center of the contact gap.
This is because the case 14 is fitted into the housing 4 and serves as a guide. The tip 10 of the normally shaped contact 6 is expanded outward by inserting the spacer 16 ₁ between the contacts, and the contact pin 17 is expanded outwardly.
Touch ₁ . However, the tip 11' of the contact 7 whose tip has been deformed inward does not move because the contact 9 does not contact the spacer 16 ₁ , and the contact pin 18 ₁ does not move.
do not come into contact with. Therefore, the contact pin 17 ₁ and the spacer 16 ₁ are in a conductive state, but the contact pin 1
8 ₁ and spacer 16 ₁ are not electrically connected. Depending on whether or not there is continuity, it is possible to determine whether the contact gap is good or not, and which contact is defective.

In FIG. 3B, the insertion tool 13 with the pass-through spacer 16 ₂ attached thereto is inserted into the connector. The tip 10 of the normally shaped contact 6 is expanded outward by inserting the spacer 16 ₂ between the contacts, but the amount of movement is small and it does not come into contact with the contact pin 17 ₁ . However, the tip 11' of the contact 7 whose tip is deformed outward comes into contact with the contact pin 18 ₁ because the distance expanded outward by the spacer 16 ₂ is large.

When inserting the stop side spacer as above,
A contact corresponding to a conductive contact pin has a good contact gap, and a contact corresponding to a conductive contact pin has a poor contact gap when the pass-side spacer is inserted.

In order to detect such continuity, it is troublesome to connect each contact pin one by one and make a determination, so it is convenient to use a detection circuit as shown in FIG. 4.

In FIG. 4, 19 is a spacer, 20 ₁ , 2
0 ₂ ... 20 _2o is connected to each light emitting diode 21 ₁ , 21 ₂ ... 21 _2o with a contact pin, and the other end of each light emitting diode 21 ₁ ... 21 _2o is
It serves as an input to the AND circuit 22. AND circuit 2
A lamp 23 is connected to the output side of 2.

Therefore, if the lamp 23 lights up when the spacer on the dead end side is inserted, the contact gaps of all the contacts are within the upper limit tolerance. When the lamp 23 is not lit, at least one of the light emitting diodes is not lit. The contact gap of the contact corresponding to this light-emitting diode that does not light up is defective. Also, in the case of a spacer on the street side, it is sufficient to switch to an OR circuit. This makes it possible to easily determine whether the lower limit of the tolerance is acceptable or not.

Note that the present invention can be applied not only to checking a contact gap where two contactors face each other, but also to checking a contact gap where the tip of one contactor is separated to form a jack-shaped contact that faces each other.

(g) Effects of the invention As explained above, the present invention has the advantage that by attaching the insertion tool to the connector, it is possible to efficiently and highly accurately judge whether the contact gaps of all the contacts are good or bad. This is a contact gap checker for connectors that has excellent practical effects.

[Brief explanation of drawings]

Fig. 1 shows an example of a jack side connector; A is a cross-sectional view, B and C are front views of the contact portion in the case of poor contact gap, and Fig. 2 is a partially cutaway view of an insertion tool according to an embodiment of the present invention. A perspective view, A and B in FIG. 3 are cross-sectional views showing the insertion tool installed, and FIG. 4 is an example of a detection circuit diagram. In the figure, 1 is the back board, 2 is the jack side connector, 3 is the housing, 6 and 7 are the contacts, 8 and 9
10, 11, 11', 11'' are the tips of the contacts, 5 is the support part, 13 is the insertion tool, 14 is the housing,
16, 16 ₁ , 16 ₂ , 19 are spacers, 17 ₁ ,
17 ₂ ..., 18 ₁ , 18 ₂ ..., 20 ₁ , 20 ₂ ...
21 ₁ , 21 ₂ . . . are light emitting diodes, and 22 is an AND circuit.

Claims (1)

[Scope of utility model registration request] The connector has a box-shaped casing made of an insulator whose opening side is fitted into the outer peripheral surface of the housing of the connector, and a thickness of the through side and end side, which is fixed on the longitudinal center line of the bottom plate of the casing. a spacer made of a conductive plate inserted into the contact gap between the opposing contacts;
An insertion device comprising contact pins arranged on both sides of the spacer on the bottom plate of the casing, corresponding to each of the contacts, and whose tip end is inserted into a predetermined position outside the tip of each of the contacts. 1. A contact gap checker for a connector, comprising: a contact gap checker; and a detection circuit that detects a conductive state between each of the contact pins and the spacer via the contact.