JPH035114Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a jack used as a power supply jack for electronic equipment such as a portable radio receiver, a microcassette tape recorder, and a calculator.

[Conventional technology]

In conventional jacks, in order to prevent wobbling as much as possible when mounted on a printed wiring board, research and development has focused solely on assembling the body and terminal firmly to the extent that relative displacement between the two is not allowed. In reality, there are jacks in which both are assembled very firmly.

[Problem that the invention attempts to solve]

However, when a jack is mounted on a printed wiring board, when the plug is inserted into or removed from the body of the jack, the body is pried, and the prying force damages the connection between the terminals soldered to the printed wiring board and the board. It is transmitted to the part.

However, if the body and terminal are tightly assembled to such an extent that relative displacement between the two is not allowed, as in a conventional jack, when the body is pried, the prying force is also applied to the joint, causing damage to the joint. Depending on the strength of the bond, the terminals may peel off immediately from the printed wiring board, or may peel off after the printed wiring board has been deformed into a curved shape. In particular, in so-called reflow compatible jacks, where the terminals are joined to the printed wiring board by reflowing cream solder in an automated mounting process, there are restrictions on increasing the bonding strength between the terminals and the printed wiring board. Yes, this tendency was remarkable.

This idea was made in view of the above circumstances, and by assembling the body and terminal so that they can be moved relative to each other, it is possible to prevent the terminal from peeling off from the printed wiring board due to the body being pried. The purpose of the present invention is to provide a jack that can prevent this from occurring. In other words, this idea is
It is an object of the present invention to provide a jack that takes effective measures to prevent the above-mentioned peeling due to twisting.

[Means for solving problems]

The measures taken to achieve this purpose include an insulating body having a plug insertion hole, a pin-shaped contact placed in the plug insertion hole of the body,
and a terminal to be soldered to a printed wiring board, and the jack is mounted on the board by soldering the terminal to the board,
A terminal member having a U-shape when viewed from above is fitted to the outside of the body, and the terminal to be soldered to the board is integrally attached to the tip of the arm portion of the terminal member that runs along the outer surface of the body in a non-fixed state. wherein the rear plate portion of the terminal member disposed on the rear wall portion of the body, the rear wall portion of the body, and the rear end portion of the contact penetrated through the rear wall portion of the body are integrally fixed. It is something that exists.

[Effect]

According to the jack of this invention, when the body is pried, the body moves up and down relative to the arm portion of the terminal member, and the prying force is absorbed by the movement of the body. Therefore, no twisting force is applied to the joint between the terminal and the printed wiring board, and even if it were applied, only a small force would be applied than conventionally.

〔Example〕

1 and 2 show a state in which a jack 1 according to an embodiment of the present invention is mounted on a printed wiring board P;
The figure shows the back side of the jack 1, Fig. 4 shows the appearance of the jack 1, Fig. 5 shows the components of the jack 1, Fig. 6 shows the internal structure of the jack 1, and Fig. 7 shows the structure of the jack 1. It shows the circuit to be constructed.

In FIG. 5, 2 is an insulating body, and this body 2 has a pin-shaped contact 3 and a terminal member 4.
, the movable contact piece member 5, and the fixed contact piece member 6 are assembled.

The rear end of the contact 3 has a flange 31 and a protrusion 3.
2 is provided integrally with this contact 3.
is placed inside the plug insertion hole 28 of the body 2 by inserting the protrusion 32 into the hole 22 formed in the rear wall portion 21 of the body 2, as shown in FIG. The terminal member 4 has an arm piece 41 which is bent into a U-shape when viewed from the side, and a rear plate part 42 . A projecting piece 41a that is fitted and runs along the outer surface of the body 2 in the front-rear direction in a non-fixed state and formed at the tip of the arm piece 41 is inserted into the groove 23 of the body 2.
It is fitted into the hole 23a that is continuous to the hole 23a. The protrusion 32 is fitted into the hole 43 of the rear plate portion 42 at the rear end of the arm piece 41.
The tip is caulked as shown in Figure 6. With this configuration, the rear plate portion 42 of the terminal member 4 disposed on the rear wall portion 21 of the body 2, the rear wall portion 21 of the body 2, and the contact 3 penetrating through the rear wall portion 21 of the body 2. The rear end portion is fixed integrally. Here, as is clear from FIG. 1, the front end portion 23b of the groove portion 23 of the body 2 is wider than the other portions, and the entire groove portion 23 including the other portions is connected to the arm portion 41. It's wider than that. Further, the hole 23a is wider than the protruding piece 41a. When the jack 1 is mounted on the printed wiring board P, the stepped portion 23c on the upper side of the groove 23 contacts the arm piece 41, and the body 2 is supported horizontally. A gap ^S1 is formed between the lower stepped portion 23d and the arm piece 41, and a gap _S2 is further formed between the lower surface of the hole 23a and the protruding piece 41a. Further, as shown in FIG. 2, a gap _S3 is formed between the protruding piece 41a and the side surface of the hole 23a. Terminals 44, 44, one on the left and one on the left and right, are provided protruding from the lower tip of the arm piece 41. A tongue-shaped seating portion 44a is curved at the tip of the terminal 44, and a gap A shown in FIG. 2 is formed between this seating portion 44a and the side surface 24 of the body 2. The movable contact member 5 has a rectangular annular frame 51, a movable contact 52 and a terminal 53 integrally formed, and is assembled into the body 2 by inserting the frame 51 into the groove 25 of the body 2. In the assembled state, the claws 51a of the frame 51 are engaged with the engagement holes 26 of the body 2 to prevent them from coming off, and the protruding terminals 53 of the body 2 are connected to the tongue-shaped seating portions 53a of the body 2. A gap (see FIG. 3) is formed between the side surface 24 and the side surface 24. The fixed contact piece member 6 has a fixed contact piece 61 and a terminal 62, and the fixed contact piece 61 is inserted into the groove part 2 of the body 2.
It is incorporated into the body 2 by inserting it into the body 7. In the assembled state, the claw 61a of the fixed contact piece 61 is engaged with the body 2 to prevent it from coming off.
Further, the terminal 62 forms a gap (see FIG. 3) between the tongue-shaped seating portion 62a and the side surface 24 of the body 2.

In the jack 1 constructed above, when a plug (not shown) is not inserted into the plug insertion hole 28, the movable contact piece 52 is attached to the fixed contact piece 61 as shown in FIG.
The contacts 52a of the two contacts form the circuit shown in FIG. When the plug is inserted into the plug insertion hole 28, the movable contact piece 52 is pushed down by the plug, and the contact 52a is separated from the fixed contact piece 61. Such a jack 1 is used, for example, as a power jack.

When mounting jack 1 on a printed wiring board, in the automated mounting process, a thin layer of cream solder is applied in advance to a predetermined location on the printed wiring board, and jack 1 is placed on top of the cream solder.
The cream solder is reflowed by heating with the seating portions 44a, 44a, 53a, 62a of the four terminals 44, 44, 53, 62 placed thereon.
When the cream solder is reflowed in this way, for example, as for the seating part 44a, as is clear from FIGS. In addition, the entire periphery of the seating portion 44a is bonded to the printed wiring board P by the cream solder C, and the bonding area between the seating portion 44a and the cream solder C becomes large, and the seating portion 44a is firmly bonded to the printed wiring board P. be done. By the way, if a curved end surface 44b is formed on the seating part 44a as shown in FIGS. 3 and 4, the above-mentioned bonding area will be further increased, so there is an advantage that the seating part 44c can be more firmly bonded to the cream solder C. be. Since the same effect is exhibited for the other terminals 53 and 62, the jack 1
will be mounted on the printed wiring board P very firmly. 53b, 62b are seating parts 53a, 6
The curved end surface formed at 2a is shown. Note that a plurality of protrusions 29... (see Fig. 3) are provided on the back surface of the body 2, and prior to mounting, these protrusions 29... are drilled into holes _P1 in the printed wiring board P as shown in Fig. 2. If it is inserted into ..., the jack 1 will not shift during the reflow of the cream solder C.

As described above, connect jack 1 to printed wiring board P.
When mounted on terminals 44, 44, 53, 62
are bonded to the printed wiring board P, so the terminal member 4, the movable contact piece member 5, and the fixed contact piece member 6 are firmly bonded to the printed wiring board P. However, only the rear end of the body 2 is supported by the rear plate portion 42 of the arm piece 41 of the terminal member 4, the fixed contact piece 61 of the fixed contact piece member 6, and the frame portion 51 of the movable contact piece member 5. Moreover, since only one side of the fixed contact piece 61 and the frame part 51 are connected to the printed wiring board P by the terminals 62 and 53,
Due to the elastic deformation of the arm piece 41, frame 51, and fixed contact piece 61, the gap S ₁ explained in FIG.
The front end of the body 2 can move upward by the movement distance of the body 2 formed by S ₂ using the vicinity of the rear end as a fulcrum. Therefore, even if the body 2 is forced upward when the plug 8 is inserted into or removed from the body 2 as shown in FIG. 1, the body 2 moves upward as shown by the imaginary line. The straining force is absorbed. Further, even if the body 2 is twisted left and right, the front end of the body 2 moves left and right by the amount of movement formed by the gap _S3 shown in FIG. 2, and the twisting force is absorbed. Therefore, terminal 4
4, 53, 62 and the printed wiring board P, no twisting force is applied, or even if it is, only a small force is applied, so that the terminals 44,
53 and 62 will not peel off. In particular, in this embodiment, as described above, the bonding strength between the terminals 44, 53, 62 and the cream solder C is increased.
There is no worry that the above peeling will occur.

In the above explanation, the jack 1 has been described which forms the movement range of the body 2 to the left and right in addition to the movement range of the body 2 upward. However, since the direction in which the body 2 is twisted is mainly upward, A movement allowance does not necessarily need to be formed. Further, the arm piece 41 of the terminal member 4 does not necessarily need to be fitted into the groove 23 of the body 2, and the side surface 24 of the body 2 may be made a flat surface. In such a case, there will be no part that regulates the movement of body 2, and there is a risk that body 2 will be twisted indefinitely.
If the size of the plug hole 91 of the housing 9 is set appropriately as shown in the figure, the movement range of the plug 8 will be restricted by the plug hole 91, so the body 2
cannot be twisted indefinitely. Furthermore, if the arm piece 41 is locally provided with a narrow portion 41c by forming a recess 41b in the middle part of the arm piece 41 as in the embodiment, the body 2 can be prevented from being twisted. At this time, the narrow portion 41c is easily twisted so that the body 2 can be moved with a small force, which has the advantage that the twisting force applied to the joint between the terminal 44 and the cream solder C is further reduced.

[Effect of idea]

As described in detail above, according to the jack of this invention, when the body is pried, the body moves relative to the terminal accordingly, so that the bending force is absorbed in an amount commensurate with the width of the movement. Therefore, no twisting force is applied to the joint between the terminal and the solder, or even if it is applied, the force is very small, and the terminal does not peel off from the printed wiring board. Therefore, we are able to provide the optimal jack when there are restrictions on increasing the bonding force between terminals and solder, such as when mounting a small jack on a printed wiring board through an automated mounting process. Become.

[Brief explanation of the drawing]

Figures 1 to 6 show a jack according to an embodiment of this invention, with Figure 1 being a side view of the mounted state, and Figure 2 being a side view of the mounted state.
The figure is a front view, Figure 3 is a back view, Figure 4 is an external view, Figure 5 is an exploded perspective view, Figure 6 is a longitudinal side view,
FIG. 7 is a circuit diagram constructed by the same jack. 1...Jack, 2...Body, 3...Contact, 4...Terminal member, 24...Side surface of body,
28... Plug insertion hole, 32... Contact protrusion, 41... Arm piece of terminal member, 44, 53,
62...Terminal, _S1 , _S2 ...Gap, P...Printed wiring board.

Claims (1)

[Claims for Utility Model Registration] An insulating body having a plug insertion hole, a pin-shaped contact disposed in the plug insertion hole of the body, and a terminal soldered to a printed wiring board, the terminal comprising: In the jack that is mounted on the board by soldering to the board, a terminal member having a U-shape in plan view is fitted to the outside of the body, and the terminal is placed along the outer surface of the body in the front-rear direction in a non-fixed state. The terminal, which is soldered to the substrate, is integrally provided at the tip of the arm portion of the member,
The rear plate portion of the terminal member disposed on the rear wall portion of the body, the rear end portion of the contact penetrated through the rear wall portion of the body and the rear wall portion of the body are fixed integrally. Jack.