JPH0122186Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switching device in which a fixed side contact portion with which a sliding brush comes into sliding contact is integrally provided with a lid portion that closes an opening of a housing.

In recent years, small portable radios, tape recorders, and the like are becoming thinner, and the electronic components used in these products are also naturally desired to be smaller and thinner.

For example, one of these types of electronic components is a so-called jack with a switch, which is a jack for connecting plugs for earphones, microphones, etc., and is equipped with a changeover switch that switches when the plug is inserted or removed. However, in the past, this type of changeover switch part was constructed with a slide switch, and a slider corresponding to the sliding part of this slide switch was engaged with the tip of the jack contact piece, and the plug was inserted and removed by the plug. The switching operation was made possible by sliding the slider.

However, this type of changeover switch is subject to dimensional constraints on the clip that is held on the slider side and constitutes the connector, and the changeover terminal section that is held by this clip to perform switching operations, which is one of the factors that prevents thinning. I was getting older.

In addition, the above-mentioned switching terminal section was manufactured by arranging the terminal sections on a single insulating board separate from the casing that houses the switch section, but as the number of parts increases, the number of assembly steps also increases. etc., was also an impediment to cost reduction.

In addition, jacks or changeover switches used in such thin electronic devices are often mounted directly on printed circuit boards due to dimensional constraints, and the terminals that make up the changeover switch are also attached to the bottom of the housing. Because it protrudes from the side, when it is attached to a printed circuit board by soldering, etc., there is a risk of flux entering the housing through the terminals, which may cause poor contact with the switch. Ta.

The present invention was devised in view of these circumstances, and its purpose is to make it possible to make it thinner than conventional switching devices of this type, and to reduce the number of parts.
The object of the present invention is to provide a highly reliable switching device that reduces assembly man-hours, reduces costs, and eliminates the risk of flux entering the housing and causing poor contact when mounted on a printed circuit board. .

The present invention is characterized in that it is constructed as follows to achieve the above object.

That is, the switch of the present invention includes a casing that has an upper opening and whose bottom wall is closely attached to a printed circuit board, a lid that closes the upper opening of the casing, and a casing that has an upper opening. The apparatus includes a housing jack part and a changeover switch part that switches in conjunction with the insertion and removal of a plug into the jack part, and a terminal part protruding from a contact piece of the jack part projects outward from the bottom wall part. At the same time, a recess provided around the terminal on the outside of the bottom wall forms a gap that prevents flux from rising along the terminal. It is held by a fixed side contact part that is integrally provided in a flush state and a brush holder that is slidably housed in the housing.
and a sliding brush that moves toward and away from the fixed side contact portion, and the terminal portion connected to the fixed side contact portion extends along the side wall portion of the casing and is not in contact with the side wall portion. In addition to being bent down, a cavity is formed in the corner of the side wall and bottom wall of the casing facing the terminal to prevent flux from rising along the terminal. It is something that

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

1 and 2 are cross-sectional views showing the jack with a switch in a state in which the lid that closes the upper opening is removed, and FIG. 1 shows the state in which the plug P is not inserted, and FIG. A state in which the plug P is inserted is shown. Reference numeral 1 denotes a resin housing having an upper opening 1a, in which the components constituting the jack part 2 are housed on the left side, and the components constituting the changeover switch part 3 are housed in the right side of the housing 1. be done.

First, regarding the jack part 2, the front wall 1 of the housing 1
A plug insertion hole 1c is provided protruding from the plug insertion hole 1c, and a plug insertion path 1d is formed in the housing 1 communicating with the plug insertion hole 1c.

Reference numeral 4 designates a ground side jack contact piece disposed on the inner periphery of the plug insertion hole 1c, and has clamping pieces 4b, 4b facing each other protruding from both sides of the plate-shaped main part 4a. Contact portions 4c, 4c are formed by curving the central portions of the pieces 4b, 4b inwardly, and the contact portions 4c, 4c come into elastic contact with the ground side conductor portion _P1 of the plug P inserted into the plug insertion path 1d. The state of connection with the plug P is maintained by holding the plug P.

Further, a terminal portion 4d is provided to protrude from the center of one side of the main portion 4a in a direction perpendicular to the main portion 4a, and is made to protrude from the bottom wall portion 1e of the housing 1 to the outside.

5 is one channel side conductor part P ₂ of the plug P
This is the first jack contact piece that contacts the main part 5a, and accommodates the plate-shaped main part 5a in the groove 6 formed in the housing 1. A protruding piece 5b is provided, and the tip end side of the tongue piece 5b is bent in an arc shape to form a contact portion 5c,
With this contact portion 5c facing the plug insertion path 1d,
It is designed to come into elastic contact with the conductor portion _P2 of the inserted plug P.

Note that the terminal portion 5d of this jack contact piece 5 is connected to the main portion 5.
a, and protrudes outward from the bottom wall portion 1e of the housing 1, as shown in FIG.

Reference numeral 7 denotes a rod-shaped break contact piece that comes into contact with the tip of the jack contact piece 5, and the tip is bent into a U-shape as shown in FIG. A terminal portion 7b is protruded from the bottom wall portion 1e of the body 1 to the outside.

8 is the other channel side conductor part P ₃ of the plug P
This is a second jack contact piece that contacts the main part 8a, and accommodates the plate-shaped main part 8a in the groove 9 formed in the housing 1. A piece 8b is provided protrudingly, and the tip end side of the tongue piece 8b is bent in a dogleg shape to form a contact portion 8c.
With this contact portion 8c facing the plug insertion path 1d,
It is designed to come into elastic contact with the conductor portion _P3 of the inserted plug P. Note that the terminal portion 8 of this jack contact piece 8
d protrudes from the main portion 8a and protrudes from the bottom wall portion 1e of the housing 1 to the outside.

Reference numeral 10 designates a rod-shaped break contact piece that comes into contact with the middle part of the tongue part 8b of the jack contact piece 8, and its tip part is bent into a U-shape to form a contact part 10a, and its base end side is connected to the housing 1. A terminal portion 10b is formed by protruding outward from the bottom wall portion 1e.

In addition, the terminal portion 5 of each of the contact pieces 5, 7, 8, 10
As shown in FIGS. 3 and 4, recesses 11 and 11 are provided in the outer bottom wall portion 1e of the casing 1 from which d, 7b, 8d, and 10b can protrude, and the casing 1 is attached to a printed circuit board PC.
Even when the outer bottom wall portion 1e is mounted in close contact with the printed circuit board PC, etc., the cavity portion 12 is formed by the recessed portions 11, 11, so that the flux during soldering is transferred to the terminal portions 5d, 7b. ,8d,10b
This prevents the particles from entering the casing 1 through the air.

Next, regarding the changeover switch section 3, 13 is the housing 1.
This slider is made of resin and is slidably moved within a guide groove 14 formed therein, and a pair of sliding brushes 15, 15 are held at both ends of the slider 13.

As shown in FIGS. 5 and 6, this sliding brush 15 has a rectangular plate-shaped main part 15a accommodated in a housing part 16 provided on the slider 13 side, and a locking part protruding into the housing part 16. 3 which is locked and fixed to the portion 17 and is bent back in a curved shape from the front edge of the main portion 15a.
Protruding book sliding tongue pieces 15b, 15b, 15b,
Sliding contact portions 15c, 15c, 1 bent in an arc shape
5c protrudes through openings 18, 18 provided in the slider 13.

Further, an operating section 19 is provided protruding from one side wall of the slider 13, and the tip of the operating section 19 is arranged on the back side of the tip of the second jack contact piece 8, so that the plug P inserted into the housing 1 can be inserted into the housing 1. Slider 13 by insertion/removal operation
can be slid as shown in FIGS. 1 and 2.

Further, spring insertion holes 20 and 21 are provided in the operation section 19 and the side wall of the housing 1, respectively, and a coil spring 22 is inserted thereinto.
2 elastically biases the slider 13 in the direction of arrow α.

By the way, the upper opening 1a of the casing 1 is closed by a lid 23 made of resin.
A fixed side contact portion 24, on which the sliding brush 15 slides and moves toward and away from the inner surface thereof, is integrally provided by insert molding.

FIG. 8 shows the lid part 23 viewed from the top side, and the fixed side contact part 24 is made of a metal plate 25 punched into a predetermined shape.
When forming the metal plate 25, it is integrally fixed to the inner surface of the lid part 23 by insert molding, and after the forming process, unnecessary parts of the metal plate 25 (excluding the shaded area in the figure) are cut off. It was designed to be removed.

Note that the sliding contact surface of the fixed side contact portion 24 is the same as that of the lid portion 23.
Needless to say, it is provided flush with the inner surface of the.

Moreover, each sliding contact portion 15c of the sliding brush 15,
15c and 15c are lines l ₁ , l ₂ , l ₃ shown in FIG.
It slides in the direction along the arrows A and B, and moves reciprocatingly within the range shown by arrows A and B, and moves toward and away from the fixed side contact portion 24.

By the way, the lid part 23 is engaged with the housing 1 by the claw parts 26, 26 protruding from both sides of the rear end side of the lid part 23.
as shown in FIG. 5, engages with the engaging portions 27, 27 provided on both side walls of the housing 1, and as shown in FIG. An engaging protrusion 28 protruding in the direction is engaged with an engaging recess 29 provided on the front wall 1b of the housing 1. In addition, through holes 30, 30 for positioning are provided in the lid portion 23, and the tips of boss portions 31, 31 protruding toward the housing 1 are fitted into the through holes 30, 30.

Further, the terminal portions 32 integrally connected to the fixed side contact portion 24 are bent near the side edge of the lid portion 23, and are bent along the side wall portion 1f of the housing 1 and are connected to the side wall portion 1f.
It is bent down without contact with the side wall portion 1f, that is, while maintaining a constant gap from the side wall portion 1f. In addition, each terminal portion 32...
A recess 33 is provided on the outer wall of the casing 1 through which the casing 1 passes, and a cavity 34 is formed by the recess 33 when the casing 1 is attached to a printed circuit board or the like. 1 more effectively prevents flux from entering the interior.

Reference numeral 35 denotes a metal decorative ring that is fitted into the plug insertion opening 1c, and is fitted with the lid portion 23 engaged with the housing 1.

36 is a positioning boss portion protruding from the bottom wall portion 1e of the housing 1, and is fitted into a through hole provided on the printed circuit board side.

According to such a configuration, the fixed side contact portion 24 on which the sliding brush 15 slides into contact with and moves toward and away from the housing 1 is integrally formed with the lid portion 23 that closes the opening 1a of the housing 1 by means such as insert molding. Because it is provided, a special space is not required to accommodate the fixed side contact part 24, and the height dimension, that is, the thickness of the switch is made sufficiently thinner than that of a conventional slide switch type, for example. be able to.

Further, since the fixed side contact portion 24 is integrally provided with the lid portion 23, it can be handled as a single component, and the number of parts and assembly man-hours are reduced, making it possible to significantly reduce costs.

Furthermore, since the lid portion 23 closes the upper opening 1a of the housing 1, the fixed side contact portion 24 provided integrally with the lid portion 23 is always connected to the housing 1.
Each terminal section 32, which is located in the upper part and is integrally connected to the fixed side contact section 24, is bent down along the side wall section 1f of the housing 1 without contacting the side wall section 1f. There is no risk of flux entering the housing 1 through the terminal portions 32 when it is attached to a printed circuit board or the like by soldering, and causes of failures such as poor contact can be eliminated.

In addition, in this embodiment, recesses 33 are provided at the corners of the side wall 1f and bottom wall 1e of the housing 1 through which the terminals 32 pass, and the jack contact pieces 5, 8 and breakers are provided in the jack 2 as well. Contact piece 7,1
Since the recessed parts 11, 11 are provided in the bottom wall part 1e from which the terminal parts 5d, 8d, 7b, 10b of 0 protrude, gaps 12, 34... are formed between them and the printed circuit board, and the upward flow of flux is can be more effectively prevented.

Although the switch of the present invention has the bottom wall of the housing closely attached to the printed circuit board, it can prevent flux from rising through the terminals of the jack and switch. Therefore, even if the switching device is thin, intrusion of flux into the housing is prevented, and it becomes possible to provide a highly reliable thin switching device.

That is, regarding the terminal portion of the jack portion, since there is a gap formed by the recess provided in the bottom wall portion of the casing around the terminal portion, it is difficult for flux to rise along the terminal portion. In addition, the terminal portion of the changeover switch portion is bent down along the side wall portion of the housing without contacting the side wall portion, and moreover, the terminal portion of the switch portion is bent down at the corner between the side wall portion and the bottom wall portion of the housing opposite to this terminal portion. Since there is a void formed by the recess, flux is difficult to rise along the terminal. Further, the fact that the terminal portion is bent down without contacting the side wall portion of the casing makes it even more difficult for flux to rise. In addition, since the terminal part extends from the fixed side contact part of the lid part, its length is inevitably longer than if it were to protrude from the housing, which causes the above-mentioned effects and In other words, the effect of preventing flux from rising due to the void, and the effect of the terminal being bent down without contacting the side wall of the casing to suppress the rise of flux, make it difficult for flux to enter the changeover switch section. Therefore, there is almost no possibility that flux entering the changeover switch will cause problems such as poor contact in the changeover switch.

Furthermore, according to the present invention, since the fixed side contact part of the changeover switch part is integrally provided flush with the lid part, the fixed side contact part is provided in the internal space surrounded by the casing and the lid part. There is no need to secure any storage space, which makes it easier to reduce the thickness.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention,
Figure 1 is a cross-sectional view showing the state in which the plug is not inserted, Figure 2
The figure is a sectional view showing the inserted state of the plug, Figure 3 is a side view, Figure 4 is a bottom view, and Figure 5 is the X--
6 is a sectional view taken along the line YY' in FIG. 1, FIG. 7 is a front view, and FIG. 8 is a top view of the lid. DESCRIPTION OF SYMBOLS 1...Housing, 1a...Top opening, 1e...Bottom wall part, 1f...Side wall part, 2...Jack part, 3...
...Switch part, 4, 5, 7, 8, 10... Jack part contact piece, 4d, 5d, 7b, 8d, 10
b...Terminal part, 11...Recessed part, 12...Gap part, 13...Slider, 15...Sliding brush, 2
3...Lid part, 24...Fixed side contact part, 32...Terminal part, 33...Recessed part, 34...Gap part, PC......
Printed circuit board, P... plug.

Claims (1)

[Scope of Claim for Utility Model Registration] A casing having an upper opening and whose bottom wall is closely attached to a printed circuit board, a lid that closes the upper opening of the casing, and a housing that is housed in the casing. and a change-over switch part that operates in conjunction with the insertion and removal of the plug into and from the jack part, and a terminal part protruding from the contact piece of the jack part protrudes outward from the bottom wall part. At the same time, a recessed portion provided around the terminal portion on the outside of the bottom wall portion forms a gap portion that prevents flux from rising along the terminal portion. It has a fixed side contact part that is integrally provided in one state, and a sliding brush that is held in a brush holder that is slidably housed in the housing and that is moved toward and away from the fixed side contact part. The terminal part connected to the fixed side contact part is bent down along the side wall part of the housing without contacting the side wall part, and the side wall part and bottom of the housing opposite to this terminal part are bent down. 1. A switching device characterized in that a recessed portion provided at a corner with a wall portion forms a gap portion that prevents flux from rising along the terminal portion.