JPH051917Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a power jack used in, for example, portable audio equipment.

(Prior Art) As shown in FIGS. 12 and 13, a conventional power jack of this type includes a conductive pin 2, a fixed contact piece 3, and a fixed contact piece 3 in a jack housing 1. A movable contact piece 4 with a movable contact part 4a in contact with the contact part 3a under spring pressure is assembled, and a power plug (not shown) is inserted into a plug insertion hole 5 provided open on the front surface of the jack housing 1. , the inner conductor of the power plug comes into contact with the pin main body 2a of the conductive pin 2, and the outer conductor of the power plug comes into contact with the spring contact piece 4b of the movable contact piece 4, causing a pressing force on the outer conductor. The structure is such that switching is performed so that the movable contact portion 4a is separated from the fixed contact portion 3a. Note that 2b is a terminal portion of the conductive pin 2, 3b is a terminal portion of the fixed contact piece 3, and 4c is a terminal portion of the movable contact piece 4, all of which are attached to the jack housing 1.
is derived from the bottom surface of

(Problem to be solved by the invention) However, in such conventional power jacks, when soldering to a printed circuit board, etc., the terminal part 3
Flux rises through the gap between b and the jack housing 1 due to capillary action, reaches the lower surface of the fixed contact part 3a, and causes poor contact between the fixed contact part 3a and the movable contact part 4a. There was a problem with it happening. Conventionally, as a measure to prevent such flux, a distance was provided between the printed circuit board surface and the fixed contact portion 3a, which resulted in a problem that the shape became larger and the material cost increased.

An object of the present invention is to provide a power jack that can prevent flux buildup without increasing costs.

(Means for Solving the Problems) To explain the configuration of the present invention to achieve the above object, the present invention includes a conductive pin in a jack housing, a fixed contact piece, and a fixed contact part of the fixed contact piece. A movable contact piece with a movable contact portion in contact with the spring pressure is incorporated, and when the power plug is inserted into the plug insertion hole of the jack housing, the internal conductor of the power plug is connected to the pin main body of the conductive pin. come into contact with
In the power jack, the external conductor of the power plug and the spring contact portion of the movable contact piece come into contact with each other, and the movable contact portion is separated from the fixed contact portion by the pressing force of the external conductor to perform switching. A terminal insertion portion of the jack housing into which the terminal portion of the contact piece is inserted is provided with a flux prevention recess for separating the jack housing from the terminal portion,
The fixed contact piece has a downwardly facing plate part that changes direction downward and is connected to the terminal part across a slit part, and the fixed contact is connected to the fixed contact from the downwardly facing plate part at a place past the direction changing part of the slit part. The terminal portion is bent in a direction perpendicular to the plate surface of the terminal portion.

(Function) By providing a recess for preventing flux buildup in the terminal insertion portion of the fixed contact piece in the jack housing, flux rise due to capillary phenomenon occurs in the part where the terminal part of the fixed contact piece and the jack housing contact each other in this recess. will no longer occur.

In addition, even if the flux rises along the terminal part of the fixed contact piece, the fixed contact piece has a downward plate part whose direction is changed downward across the slit part from the terminal part, and the fixed contact part Since the downward plate portion is bent in a direction perpendicular to the plate surface of the terminal portion past the direction change point of the slit portion, the direction change point of the slit portion acts as a flux returning portion, This will prevent flux from moving beyond that point.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 11. In addition, the above-mentioned 12th
Portions corresponding to those in the figure and FIG. 13 are designated by the same reference numerals.

As shown in FIGS. 1 to 4, the power jack of this embodiment also has a conductive pin 2, a fixed contact piece 3, and a movable contact piece 4 incorporated into the jack housing 1 in the same manner as described above. , when the power plug (not shown) is not inserted into the plug insertion hole 5, the movable contact portion 4a (see FIGS. 10 and 11) is on the lower surface of the fixed contact portion 3a (see FIGS. 7 to 9). When these parts come into contact, the switch formed by these parts is in a closed state, and electricity is supplied from the internal power source (dry battery) of the portable audio device or the like.

In particular, in this embodiment, the terminal portion 3b of the fixed contact piece 3
A flux prevention recess 6 for separating the jack housing 1 from the terminal portion 3b is formed as a cutout window in the terminal insertion portion of the jack housing 1 into which the jack housing 1 is inserted.

Further, as shown in FIGS. 7 to 9, the fixed contact piece 3 has a downwardly facing plate portion 3h which is connected to the terminal portion 3b by changing its direction downward across the slit portion 3c.
The fixed contact part 3a is formed by punching out a single metal plate, and the fixed contact part 3a is connected to the terminal part 3b from the downward plate part 1h at the point where it goes down past the inverted U-shaped direction change part 3d of the slit part 3c. The structure is bent in a direction perpendicular to the plate surface. In addition, 3e is a locking claw part for jack housing 1 provided by cutting and bending the upwardly extending part 3f of terminal part 3b and fixed contact part 3a, and 3g is a raised part at the tip of fixed contact part 3a. This is a positioning part for inserting into the provided jack housing 1.

As shown in FIGS. 5 and 6, locking pawls 2c are also cut out on both sides of the rear part of the conductor pin 2.
is provided. As shown in FIGS. 10 and 11, the movable contact piece 4 is also provided with a locking claw portion 4d by cutting and bending.

When a flux rising prevention recess 6 is provided in the terminal insertion portion of the fixed contact piece 3 in the jack housing 1 of such a power jack, the terminal portion 3b of the fixed contact piece 3 and the jack housing 1 are in contact with each other in this recess 6. Therefore, no flux rises above the recess 6 due to capillary action. Furthermore, even if the flux rises along the terminal portion 3b of the fixed contact piece 3, it will not flow from the terminal portion 3b to the slit portion 3.
Downward plate portion 3h whose direction has been changed downward across c.
, and the fixed contact portion 3a connects to the terminal portion 3b at a point past the direction changing portion 3d of the slit portion 3c.
Since the slit portion 3c is bent in a direction perpendicular to the plate surface, the direction changing portion 3d of the slit portion 3c acts as a flux returning portion, and can prevent flux from moving beyond it.

(Effects of the Invention) As explained above, in the power jack according to the present invention, since the recess for preventing flux from rising is provided in the terminal insertion portion of the fixed contact in the jack housing, this recess allows the terminal of the fixed contact to This has the advantage that no flux rises due to capillary action that occurs in the area where the jacket and the jack housing come into contact. Furthermore, even if the flux were to rise along the terminal portion of the fixed contact piece, the fixed contact piece has a downwardly facing plate portion that is directed downward across the slit portion from the terminal portion, and the fixed contact portion is Since the downward plate part is further bent in a direction perpendicular to the plate surface of the terminal part after passing the direction change part of the slit part, the direction change part of the slit part acts as a flux returning part, and It is possible to reliably prevent flux from moving further. As described above, according to the present invention, measures can be taken to prevent flux from rising in the fixed contact piece with a simple shape without increasing the size of the fixed contact piece, so there is an advantage that cost increases can be prevented.

[Brief explanation of drawings]

1 is a side view of one embodiment of the power jack according to the present invention, FIG. 2 is a front view of the power jack shown in FIG. 1, FIG. 3 is a rear view of the power jack shown in FIG. 1, and FIG. The figure is a bottom view of the power jack shown in Fig. 1, Figs. 5 and 6 are front and side views of the conductive pin used in the power jack shown in Fig. 1, and Figs. 7 and 8 are Front and side views of the fixed contact piece used in the power jack shown in Figure 1, Figure 9 is a bottom view of Figure 7, and Figures 10 and 11 are used in the power jack shown in Figure 1. A plan view and a side view of the movable contact piece, FIG. 12 is a front view of a conventional power jack, and FIG. 13 is a sectional view taken along the line A-A in FIG. 12. 1... Jack housing, 2... Conductive pin,
2a...Pin body part, 2b...Terminal part, 3...Fixed contact piece, 3a...Fixed contact part, 3b...Terminal part,
3c...Slit part, 3d...Direction change part, 3
h... Downward plate part, 4... Movable contact piece, 4a... Movable contact part, 4b... Spring contact piece part, 4c... Terminal part, 5... Plug insertion hole, 6... Flux upward prevention recess.

Claims (1)

[Scope of utility model registration request] A conductive pin, a fixed contact piece, and a movable contact piece whose movable contact part is in contact with the fixed contact part of the fixed contact piece with spring pressure are assembled in the jack housing, and are inserted into the plug insertion hole of the jack housing. When the power plug is inserted, the inner conductor of the power plug comes into contact with the pin main body of the conductive pin, and the outer conductor of the power plug comes into contact with the spring contact of the movable contact, causing the outer conductor to In a power jack in which switching is performed by separating the movable contact portion from the fixed contact portion due to a pressing force, the terminal insertion portion of the jack housing into which the terminal portion of the fixed contact piece is inserted has a portion from the terminal portion to the terminal insertion portion of the jack housing. A flux upward prevention recess is provided to separate the jack housing, and the fixed contact piece has a downwardly facing plate portion that changes direction downward from the terminal portion across a slit portion and is connected to the terminal portion, and the direction changing portion of the slit portion A power jack characterized in that the fixed contact portion is formed by bending from the downward facing plate portion in a direction perpendicular to the plate surface of the terminal portion.