JPH0433273A - Pressure type contact and assembly method for connector using it - Google Patents

Abstract

PURPOSE:To improve the efficiency of the press-in work by pressing the pressing sections of pressure type contacts into through holes of a printed board for fitting to the printed board, and providing excess sections with the same size as terminals via notches at tips of the terminals of the contacts. CONSTITUTION:A jack completed body 15 is inserted into a printed board 7 so that terminals 12b and excess sections 12d of contacts 12 correspond to through holes 7a of the printed board 7. The excess sections 12d of the contacts 12 are protruded on the back face side of the printed board 7 in alignment, the excess sections 12d are pulled downward with a pinching tool, thus the contacts 12 are fixed to the printed board 7 via an insulator 16. When the pinching tool is further pulled downward, the excess sections 12d are cut at notches 12c portion, and the jack completed body 15 can be constituted on the printed board 7. The press-in work to the printed board 7 is performed efficiently and surely, the occurrence of defective products is reduced, and productivity can be improved.

Description

[Detailed Description of the Invention] [Summary] Regarding a press-fitting type contact that is press-fitted into a through-hole portion of an M board and fixed to the board, and a method for assembling a connector using the same, the press-fitting work can be performed efficiently and reliably. With the aim of improving productivity by reducing defects that occur during this work, a press-fitting part that is wider than the terminal is provided in a part of the longitudinal direction of the terminal that connects to the external circuit. The terminal portion of the contact is inserted from its tip into the through hole of the printed circuit board, and the press-fitting portion is press-fitted into the through hole of the printed circuit board to be attached to the printed circuit board. An extra length having the same thickness as the terminal is provided at the tip of the terminal via a notch.

Further, the plurality of press-fitting contacts and the press-fitting contacts are arranged at a predetermined pitch so that the terminal including the press-fitting part of the press-fitting contact protrudes and is exposed, and movement toward the terminal is suppressed. an insulator having a housing area for the press-fit contact that can be inserted into the insulator, and an inner diameter that is wider than the width of the terminal and narrower than the width of the press-fit portion at a position corresponding to each of the terminals that protrudes from the insulator and is exposed. and a printed circuit board having through holes formed therein, and each terminal that protrudes from the insulator and is exposed after inserting the press-fit mounting type contact from the tip of the extra length into each of the accommodation areas of the insulator. is passed through each corresponding through hole of the printed circuit board, and each terminal protruding from the back side of the printed circuit board is pulled by the extra length provided at its tip, so that each terminal is inserted into the printed circuit board through the insulator. It is configured by being attached and fixed to the board.

[Industrial application field]

The present invention relates to the structure of a press-fitting contact that is mounted on a printed circuit board, and in particular, the present invention relates to a press-fitting type contact that is mounted on a printed circuit board, and in particular, a press-fitting method that reduces defects that occur during the press-fitting operation and improves productivity by efficiently and reliably performing the press-fitting operation on the printed circuit board. This invention relates to a wearable contact and a method of assembling a connector using the same.

[Conventional technology]

Figure 4 shows an example of the shape of a conventional press-fit contact, Figure 5 shows how a conventional contact is attached to a printed circuit board, and Figure 6 shows how a connector using a conventional contact is attached to a printed circuit board. It is a figure which shows the case where it is mounted.

It should be noted that the figures show cases in which the contacts are jack-side terminals.

In FIG. 4, contacts 2 are formed in a comb blade shape at equal pitches on a connecting member 1 along the longitudinal direction of a strip-shaped metal spring material through a plurality of press punching and bending steps. On the free end side, there is a contact portion 2a which is bifurcated and whose facing inner side is a contact area with a plug (not shown).
A terminal 2b connected to an external circuit is formed at the other end connected to the connecting member 1.

The connecting portion 2c of the terminal 2b portion with the connecting member 1 is formed into a narrow ■-shaped shape in order to facilitate cutting along the line a"-a" in the drawing in a subsequent process.

Further, between the contact portion 2a and the terminal 2b, there are provided two protrusions 2d protruding and bent on both sides of the contact portion 2a in the thickness direction at positions close to the contact portion 2a. The terminal 2 is located on the terminal 2b side of the section 2d.
Partially press b in the thickness direction and press b to b? Shown in cross section (
As shown in 4-1), a press-fit portion 2e is formed which is expanded to the width W@W' of the terminal 2b and whose thickness is partially reduced.

This means that when the press-fitting part 2e is inserted into a region narrower than its width W, for example, a hole, the outer surface 2e of the press-fitting part 2e in the width direction
1 is pressed by the hole wall, so it is the thinnest part (area A in the figure)
This means that it can be deformed and fixed in the hole.

Therefore, by separating the contact 2 from the connecting member 1 by cutting along the line a''-a', a desired press-fitting type contact can be obtained.

In FIG. 5, which shows the case of attaching a conventional contact to a printed circuit board, the printed circuit board 3 is formed with a through hole 3a into which the contact is inserted and fixed, and a conductor pattern 3b connected to the through hole 3a. In this case, the inner diameter of the through hole 3a is larger than the width W of the terminal 2b of the contact 2 described in FIG. 4, and smaller than the radius W° of the press-fit portion 2e.

Note that the figure shows a case in which the lower side of the protrusion 2d in the drawing also serves as an insertion stopper, so when the lower side of the protrusion 2d comes into contact with the upper surface of the through hole 3a, the contact 2 is fixed to the printed circuit board 3.

Therefore, each contact 2 obtained in FIG. By pressing with a tool (not shown) until the contact 2 is completely stopped, the contact 2 can be easily fixed to the through hole 3a and eventually to the printed circuit board 3, as shown in (2).

With the contact 2 having such a shape, it can be attached to the printed circuit board 3 without touching the contact portion 2a or the terminal 2b, which are directly involved in contact with the plug and connectivity with an external circuit, thereby reducing the contact and connectivity mentioned above. It can be implanted on the printed circuit board 3 without any trouble.

However, when the density of contacts to be mounted on a printed circuit board is high, the distance between adjacent contacts becomes smaller, which limits the tools that can be used to press the protrusion 2d, resulting in a limitation in the mounting density of the contacts. In addition, since the contact is press-fitted by pressing, the contact may buckle.

Further, FIG. 6, which shows a case where a connector using conventional contacts is mounted on a printed circuit board, shows a side cross section of the jack side of the connector.

The completed jack body 5, which is the jack side connector in the figure, has individual contacts 2 separated into an insulator 6, which is formed so that the contacts 2 explained in FIG. For example, the protruding portion 2d is assembled so as not to separate from the insulator 6 and fall off.

In particular, the insulator 6 in this case is used to protect the arranged contacts 2 from external forces.
A circumferential wall 6a having a height sufficient to cover the contact portion 2a of the insulator 6 surrounds the area in which the contact 2 is disposed, and the bottom portion of the wall 6a has the press-fitted portion 2e of the contact 2 inserted into the insulator 6. It is exposed from the contact surface 6b with the printed circuit board.

On the other hand, a printed circuit board 7 similar to the printed circuit board 3 in FIG. 5 has through holes 7a formed at positions corresponding to the arrangement pitch of the contacts 2 arranged on the completed jack body 5.

Note that the diameter of the through hole 7a is formed in the same manner as the through hole 3a shown in FIG.

Therefore, the above-mentioned completed jack 5 is inserted into the printed circuit board 7 so that the terminal 2b of the contact 2 corresponds to the through hole 7a of the printed circuit board 7, and at the stop position described in FIG. By pressing the entire jack 5 at step 8, the jack 5 can be press-fitted onto the printed circuit board 7.

In such a case, there is an advantage that the completed jack assembly 5 equipped with the plurality of contacts 2 can be mounted on the printed circuit board 7 with a single pressing operation, so that the full-length work can be carried out efficiently.

However, since multiple contacts are press-fitted at the same time, the pressing force increases, but since the contacts are press-fitted through an insulator, the insulator may be deformed or destroyed, and the individual Contacts may be incompletely press-fitted because the pressing force cannot be controlled.

Further, since the contact is press-fitted by pressing, the contact may buckle, as shown in FIG. 5.

[Problems to be Solved by the Invention] Conventional press-fit contacts have a problem in that the contacts are easily buckled because they are press-fitted into the printed circuit board by pressure, and there are also restrictions on the tools used to press the contacts. There was a problem in that no improvement in productivity could be expected because of the occurrence of

[Means for solving cgia] The above problem is solved by inserting the terminal part of the contact, which has a press-fitting part wider than the terminal in a part of the longitudinal direction of the terminal connected to the external circuit, from the tip of the printed circuit board. A press-fitting type contact is inserted into a through-hole of the printed circuit board, and the press-fitting part is press-fitted into the through-hole of the printed circuit board to be attached to the printed circuit board, and the terminal is attached to at least the tip of the terminal of the contact through a notch. This problem can be solved by a press-fit type contact that has an extra length of the same thickness.

Further, the plurality of press-fitting contacts and the press-fitting contacts are arranged at a predetermined pitch so that the terminal including the press-fitting part of the press-fitting contact protrudes and is exposed, and movement toward the terminal is suppressed. an insulator having a housing area for the press-fit contact that can be inserted into the insulator, and an inner diameter that is wider than the width of the terminal and narrower than the width of the press-fit portion at a position corresponding to each of the terminals that protrudes from the insulator and is exposed. and a printed circuit board having through holes formed therein, and each terminal that protrudes from the insulator and is exposed after inserting the press-fit mounting type contact from the tip of the extra length into each of the accommodation areas of the insulator. is passed through each corresponding through hole of the printed circuit board, and each terminal protruding from the back side of the printed circuit board is pulled by the extra length provided at its tip, so that each terminal is inserted into the printed circuit board through the insulator. The problem is solved by a method of assembling a connector that is attached and fixed to a board.

[For production]

If press-fitting by pressing is replaced by press-fitting by tension, the occurrence of buckling can be eliminated.

In the present invention, an extra length is formed at the terminal end of the contact via a notch.

Therefore, by pulling the extra length and press-fitting the contact, buckling can be suppressed, and the cutting strength at the notch can be controlled by the shape of the notch, so the cutting strength can be set appropriately. It is possible to manage the individual tensile force applied to each contact, and it is possible to suppress the occurrence of incompletely press-fitted contacts.

[Example] Fig. 1 is a diagram showing an example of the shape of a press-fit mounting type contact according to the present invention, Fig. 2 is a diagram showing an example of mounting on a printed circuit board, and Fig. 3 is a diagram showing an example of assembling the connector. It is.

In addition, in the figure, it is assumed that the contact is a jack terminal as in FIGS. 4 to 6.

In FIG. 1, as explained in FIG. 4, the contacts 12 formed in the shape of comb blades at equal pitches on the connecting member 11 have a contact portion 1 on the free end side that contacts a plug (not shown).
2a is formed, and at the other end, a terminal 12b connected to an external circuit is replaced by the connecting member 11 via an extra length 12t1 via a notch 12c.

Further, a press-fitting part 12e, which is the same as the press-fitting part 2e explained in FIG. 4, is formed at a position close to the contacting part 12a between the contacting part 12a and the terminal 12b.

Note that the cross section of the press-fitting part 12e taken along line bb' is (1
As shown by -1), the width w1 is wider than the initial width W of the terminal 12b.

Therefore, when the press-fitting portion 12e is inserted into a through-hole having a diameter smaller than the width W°, the contact 12 is press-fitted into the through-hole as explained in FIG. By cutting along c-ct in the figure, the desired press-fitting type contact 12 can be obtained.

In FIG. 2 showing the case where it is mounted on a printed circuit board, the printed circuit board 3 is the same as that explained in FIG.
A indicates a through hole, and 3b indicates a conductor pattern 3b.

Therefore, each contact 12 obtained in FIG. 1 is inserted into the through hole 3a from the side of the extra length 12d, and the extra length 12d is shown in the figure at the position where the contact 12 is temporarily stopped (state of ■ in the figure). By pulling the contact 12 by a predetermined distance as shown by the arrow d using a tool that does not have a handle, the contact 12 can be fixed to the through hole 3a and eventually to the printed circuit board 3 as shown in (2).

With such a contact 12, as in the case of FIG.
Since the notch 12c can be attached to the contact 12, it can be attached to the printed circuit board 3 without deteriorating the contact/connection performance, and the notch 12c is made so that the cutting strength at the notch 12c due to tension is slightly greater than the tensile force of the contact 12. If the amount of constriction is set, the extra length 12d can be cut from the terminal 12b by only slightly increasing the tensile force on the extra length 12d, so that the same state as shown in FIG. 5 can be achieved.

In addition, even when the contacts to be mounted on the printed circuit board are placed at a high density and the distance between adjacent contacts is small, there is no restriction on the above-mentioned tension tool, and since the contacts can be press-fitted by tension, there is no possibility that the contacts will buckle. There is no.

FIG. 3, which shows the case of constructing a connector, shows a side cross section of the jack side, similar to FIG. 6.

In Figure 3, (A) is a diagram showing the state before connector assembly;
B) is a diagram showing the state after being assembled as a connector.

In FIG. 3(A), the completed jack body 15 serving as the jack-side connector is an insulator formed so that the contacts 12 in FIG. It is composed of a body 16 and contacts 12 that are individually inserted into the predetermined positions of the insulator 16. In particular, in this case, the contact 12 has a contact portion 12a of the contact 12 in the insulator weight 6. base 12
It is in a state where it is caught on the insulator 16 at f.

Furthermore, through holes 7a are formed in the printed circuit board 7 described in FIG. 2 at positions corresponding to the arrangement pitch of the contacts 12 inserted into the completed jack body 15.

Therefore, when the above-mentioned completed jack 15 is inserted into the printed circuit board 7 so that the terminal I2b and the extra length 12d of the contact 12 correspond to the through hole 7a of the printed circuit board 7, each contact 12 is connected to the printed circuit board 7. It stops at the position shown by ■ in Figure 2, but the insulator 1
6 stops at a position where its lowermost surface 16a contacts the surface of the printed circuit board 7, and as a result, each contact 12 rises above the insulator 16.

However, the terminals 12b, that is, the extra lengths 12d of each contact 12 are aligned and protrude from the back side of the printed circuit board 7.

Therefore, the contact 12 can be fixed to the printed circuit board 7 via the insulator 16 by pinching the extra length 12d with a pinching tool or the like (not shown) and pulling the contact 12 downward.

(B) represents this state.

After that, when the clamping tool is further pulled downward, the extra length 12d is cut at the notch 12c as shown by the broken line e, and the desired connector, that is, the completed jack 15 can be constructed on the printed circuit board 7. .

In such a case, since the insulator can also be fixed to the printed circuit board 7 at the same time when the plurality of contacts 12 are attached to the printed circuit board 7 with one pulling operation, the jack can be configured in advance as a complete jack as explained in FIG. (You can configure connectors efficiently.)

Furthermore, since the contacts are directly pulled and press-fitted into the printed circuit board 7, the insulator will not be deformed or destroyed, and at the same time, each contact will not buckle.

Furthermore, since there is no need to provide holes or the like in the insulator for fixing the connector to the printed circuit board 7, there is an advantage that the insulator and ultimately the connector can be made smaller.

〔Effect of the invention〕

As described above, the present invention provides a press-fit type contact and a connector assembly using the press-fit type contact, which reduces defects that occur during engineering work on printed circuit boards and improves productivity by efficiently and reliably performing engineering work on printed circuit boards. method can be provided.

Although the present invention will be described using a case where the contact is a jack, the same effect can be obtained even when the contact is a plug.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of the shape of the press-fit mounting type contact according to the present invention, Fig. 2 is a diagram showing an example of mounting on a printed circuit board, Fig. 3 is a diagram showing an example of connector assembly, and Fig. 4 is a conventional Figure 5 is a diagram showing an example of the shape of a press-fit type contact, Figure 5 is a diagram showing a case where a conventional contact is installed on a printed circuit board, Figure 6 is a diagram showing a case where a connector using a conventional contact is installed on a printed circuit board. Figure. In the figure, 3.7 is a printed circuit board, 3b is a conductor pattern, 12 is a contact, 12b is a terminal, 12d is an extra length, 12f is a base, 15 is a completed jack, and 16a is a bottom surface. 3a and 7a are through holes; 11 is a connecting member; 12a is a contact portion; 12c is a notch; 1 Figure 9 JJλ (B) shows a wide view of the printed circuit board (B) Figure 9 shows an example of the shape of a conventional press-fitting type collector (Y)
Diagram showing the prisoner on the left

Claims (2)

[Claims] (1) Insert the terminal part of the contact, which has a press-fit part wider than the terminal in a part of the longitudinal direction of the terminal connected to the external circuit, into the through-hole of the printed circuit board from its tip, and The contact is a press-fit type contact that is attached to the printed circuit board by press-fitting it into the through hole of the printed circuit board, and at least the tip of the terminal (12b) of the contact (12) has a notch (
12c) is provided with an extra length (12d) having the same thickness as the terminal (12b). (2) A plurality of press-fit mounting type contacts (1
2), the press-fit type contacts (12) are arranged at a predetermined pitch so that the terminals (12b) including the press-fit portions of the press-fit type contacts (12) protrude and are exposed, and movement toward the terminals is suppressed. An insulator (16
), and through holes (7a) having an inner diameter that is wider than the width of the terminal and narrower than the width of the press-fitting part are formed at positions corresponding to each of the terminals (12b) protruding and exposed from the insulator (16). After inserting the press-fit mounting type contacts (12) into each of the accommodation areas of the insulator (16) from the tip of the extra length, Each terminal (12b) protruding and exposed is passed through each corresponding through hole (7a) of the printed circuit board (7), and each terminal (12b) protruding from the back side of the printed circuit board (7) is inserted into its tip. A method for assembling a connector, characterized in that each terminal (12b) is attached and fixed to the printed circuit board (7) via the insulator (16) by pulling it with an extra length (12d) provided in the connector.