JPH07226262A - Electric power plug apparatus - Google Patents

Abstract

PURPOSE:To easily retain every excellent function and property such as an electric function, a mechanical function, and safety and reliability as well even in the case a three pin plug is employed for an electric power source plug apparatus. CONSTITUTION:An electric power source plug part 2 in which a pair of electric power source plug pins 3, 4 and an insulating part R are unitedly formed and which is built in a housing Mh of an AC adaptor (an electric appliance) M is composed so as to move to a use position Pu or a housing position Ph by a sliding operation of an operation knob part 5 put in the outside of the housing Mh. A supporting arm part 6 is unitedly formed in the insulating part R of the electric power source plug part 2 and an earth pin 7 is unitedly formed in a pin supporting part 6s at the tip of the supporting arm part 6 and at the same time the operational knob 5 is unitedly formed at another position of the insulating part R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable power plug device integrally provided in electric equipment such as an AC adapter.

[0002]

2. Description of the Related Art Conventionally, A for converting a commercial AC power supply into a DC
C adapters are known. Normally, this kind of AC adapter is integrally provided with a power plug part to be plugged into a power outlet, but the power plug pin of the power plug part is projected from the housing of the AC adapter to the outside, so that storability,
There is also known an AC adapter in which a power plug portion can be stored inside a housing because portability and safety are impaired (see Japanese Laid-Open Patent Publication No. 5-144502).

[0003]

By the way, as a method of storing the power plug portion inside the housing, a rotary type and a slide type are known, and both methods have electrical performance such as insulation and operability. It is necessary to satisfy the required standards such as safety and reliability without impairing the mechanical performance such as.

Since the conventional power plug unit employs a so-called two-pin type having a pair of power plug pins, its structure is simple, and its electrical performance and mechanical performance as well as safety and reliability are low. , Could be secured relatively easily. However, when adopting the so-called three-pin type in which a ground pin is added to the power plug part, the number of pins increases,
Not only is the structure complicated and large, but it also includes a ground pin that has a property different from that of the power plug pin, which creates new challenges for satisfying electrical and mechanical performance, as well as safety and reliability. There was a problem that various performances could not be secured easily.

The present invention solves the problems existing in the prior art as described above. Even when the 3-pin type is adopted, the electrical performance and mechanical performance, and further the safety and reliability are improved. An object of the present invention is to provide a power plug device that can easily secure various performances.

[0006]

According to the present invention, a pair of power plug pins 3 and 4 and an insulating material R are integrally molded, and a power plug portion 2 which is built in a housing Mh of an AC adapter (electrical device) M is provided. The operation position Pu or the storage position P can be set by sliding the operation knob 5 arranged outside the Mh.
In the power plug device 1 configured to be movable to h, in particular, the support arm portion 6 is provided on the insulating material R of the power plug portion 2.
Is integrally formed, and the ground pin 7 is integrally provided on the pin support portion 6s at the tip of the support arm portion 6, and the operation knob portion 5 is integrally formed at another position of the insulating material R. .

In this case, the operation knob portion 5 has a housing Mh.
Is housed in a recess Ms provided on the outer surface Mf of the housing M, a part of the housing Mh is projected from the outer surface Mf of the housing Mh by 0.4 mm to 1.2 mm, and one end of the power plug portion 2 is continuously formed to be elastically displaceable. And the stopper M on the housing Mh side corresponding to the use position Pu and the storage position Ph
Stopped portions 8 ... Which can be locked with respect to x ..., My ... are provided. In addition, the operating knob portion 5 that is displaced in the power plug portion 2
A position regulating section 9 for regulating the position is provided.

On the other hand, it is desirable that the power plug device 1 be provided with a guide box 10 that can be mounted inside the housing Mh and that houses the power plug portion 2 including the ground pin 7. By partitioning the internal space of the guide box 10, a first space 13 for housing the power plug part 2 and a second space 14 for housing the ground pin 7 are formed, and a slit 15 through which the support arm 6 passes.
A partition wall portion 12 having is provided. And the partition wall portion 12
Has a pair of connection conductor plates 1 having contact brush portions 16b and 17b which respectively contact the power plug pins 3 and 4.
6 and 17 are attached by fixing concave portions 18 ... and fixing convex portions 19 ...

The guide box 10 has a slit 1
A guide rail portion 20 which is located above 5 and which is inserted into the power plug portion 2 to slidably support the power plug portion 2 and also serves as a cover is provided. Furthermore,
The guide box 10 is provided with a pair of guide rib portions 21, 21 for guiding the left and right sides of the power plug portion 2, and reinforcing rib portions 22, 2 for supporting the partition wall portion 12 at a right angle.
2 is provided.

[0010]

According to the power plug device 1 of the present invention, the power plug portion 2 having the pair of power plug pins 3 and 4 is integrally molded with the insulating material R. Further, the insulating material R is provided with a support arm portion 6 extending a part thereof, and the pin support portion 6s at the tip thereof is provided with the ground pin 7
Are provided integrally. Further, the operation knob portion 5 is integrally formed at another position of the insulating material R.

Therefore, by sliding the operation knob portion 5,
When the operation knob portion 5 is moved to the use position Pu, the power plug portion 2 and the ground pin 7 are also moved, and the power plug pins 3 and 4 and the ground pin 7 project outside from the housing Mh. On the other hand, when the operation knob 5 is slid in the opposite direction to move the operation knob 5 to the storage position Ph, the power plug pins 3 and 4 and the ground pin 7 are stored inside the housing Mh.

At this time, the operation knob portion 5 is housed in the recess Ms provided in the outer surface Mf of the housing Mh, and a part of the operation knob portion 5 projects from the outer surface Mf of the housing Mh by 0.4 mm to 1.2 mm. The unnecessary protrusion of the operation knob portion 5 is eliminated, and good operability is secured. Further, stopper parts Mx ..., My ... corresponding to the use position Pu and the storage position Ph are provided on the housing Mh side, and the operation knob part 5 has one end with respect to the power plug part 2 so as to be elastically displaceable. Only formed continuously,
Further, since the stopper portion 8 that can be engaged with the stopper portions Mx ..., My ... on the housing Mh side is provided, if the operation knob portion 5 is moved to the use position Pu or the storage position Ph, the stopper portion 8 will be formed. Engage with the stoppers Mx ... Or My. It should be noted that when the operation knob portion 5 is pushed, the stopper portion 8 is also displaced, and the locking with respect to the stopper portions Mx ... Or My. Further, since the displaced operation knob portion 5 is regulated by the position regulation portion 9, unnecessary displacement of the operation knob portion 5 is prevented.

On the other hand, if the guide box 10 is used, the power supply plug portion 2 and the ground pin 7 housed inside the guide box 10 will be described.
Is insulated (isolated) from the internal space of the housing Mh. Further, the inner space of the guide box 10 is partitioned by the partition wall portion 12 into a first space portion 13 and a second space portion 14, and the first space portion 13 accommodates the power plug portion 2 and a second space portion. Since the ground pin 7 is accommodated in the space portion 14, the power plug portion 2 and the ground pin 7 are separated from each other by the partition wall portion 12.
Is insulated (isolated) by. At this time, the support arm portion 6 provided between the power supply plug portion 2 and the ground pin 7 is located inside the slit 15 provided at the center of the partition wall portion 12.

Further, the partition wall 12 has a fixing recess 18 ...
And the connecting projections 16, 1 by the fixing projections 19 ...
7 is attached. The connection conductor plates 16 and 17 include contact brush portions 16b and 17b.
b and 17b contact the power plug pins 3 and 4, respectively. Therefore, by connecting the power input cords of the electric circuit built in the housing Mh to the connection conductor plates 16 and 17, respectively, the power input cords are connected to the connection conductor plates 16 and 17.
It is electrically connected to each power plug pin 3, 4 via 17. The earth cord can be directly connected to the earth pin 7.

Further, since the power supply plug portion 2 is slidably supported by the guide rail portion 20 provided in the guide box 10, the power supply plug portion 2 is in use position Pu or storage position Ph along the guide rail portion 20. Move to. At this time, the left and right sides of the power plug portion 2 are guided by the pair of guide rib portions 21, 21 provided in the guide box 10, so that the power plug portion 2 moves smoothly along the guide rail portion 20 without rattling. To do. The opening of the slit 15 is covered by the guide rail portion 20 having a covering function. Further, since the partition wall portion 12 is supported at right angles by the reinforcing rib portions 22, 22, the partition wall portion 12 is mechanically reinforced.

Therefore, even when the three-pin type including the power supply plug pins 3 and 4 and the ground pin 7 is adopted, various performances such as electrical performance and mechanical performance, and further safety and reliability are easily secured. .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the external configuration of an AC adapter (electrical device) M including the power plug device 1 according to this embodiment will be described with reference to FIGS. 9 and 10.

The AC adapter M is a flat housing M formed by combining a pair of left and right housing halves containing a power supply circuit.
The opening Mo is provided on one side of the narrow side surface. Then, a guide box 10 accommodating the power plug device 1 is attached inside the housing Mh, and the front surface of the guide box 10 faces the opening Mo. Also, from the other side surface of the housing Mh, the DC output cord M
Derive c.

Next, the structure of the power plug device 1 according to this embodiment will be described with reference to FIGS.

In FIG. 1, reference numeral 10 denotes the guide box, which is formed in the shape of a rectangular parallelepiped having an internal hollow with an open upper surface and a rear surface. The guide box 10 is attached to the inside of the housing Mh by a plurality of restricting protrusions Mp provided on the inner surface of the housing Mh, and the front surface of the guide box 10 closes the opening Mo of the housing Mh as described above. To do.

On the other hand, inside the guide box 10, an integrally molded partition wall portion 12 is provided. As shown in FIG. 3, the partition wall portion 12 divides the inner space of the guide box 10 into upper and lower halves, whereby a first space portion 13 for accommodating the power plug portion 2 and a first space portion for accommodating the ground pin 7 are formed. The two spaces 14 are formed. Further, a slit 15 through which a support arm portion 6 described later passes is provided at the center of the partition wall portion 12. In addition, rising portions 12s and 12s which are raised at a right angle are integrally formed on the inner edge portion of the partition wall portion 12 forming the slit 15.

Further, a pair of left and right reinforcing rib portions 22, 22 are provided between the partition wall portion 12 inside the guide box 10 and the bottom portion of the guide box 10. Thereby, the partition wall portion 12 is supported at right angles by the reinforcing rib portions 22 and 22, and the partition wall portion 12 is mechanically reinforced.

Further, a pair of spaced guide ribs 21, 21 for guiding the left and right sides of the power plug 2 to be described later are provided on the inner surface of the front surface of the guide box 10. Furthermore, the slit 15 is formed on the inner surface of the front part of the guide box 10.
A guide rail portion 20 having a T-shaped cross section, which is located above, and which is inserted into the power plug portion 2 to slidably support the power plug portion 2 and also serves as a cover. The covering function of the guide rail portion 20 covers the opening of the slit 15. Reference numeral 30 denotes a guide strip provided on the bottom surface of the guide box 10, and an engaging recess 31 provided at the lower end of the pin support portion 6s engages with the guide strip 30.

On the other hand, a pair of connecting conductor plates 16 and 17 spaced apart from each other on the left and right sides are attached to the partition wall portion 12. As shown in FIGS. 5 and 6, one connecting conductor plate 16 is provided with a contact brush portion 16b which is punched out in a U shape with one end left and is bent up at an angle, and one end is left behind it. A locking piece portion 16s punched out in a U-shape and obliquely folded down is provided. Further, a connecting portion 16c bent at a right angle is provided at the rear end. On the other hand, the partition wall 12 is provided with a fixing recess 18 into which the locking piece 16s is inserted and locked, and a fixing for restricting upward displacement of the connection conductor plate 16 on the inner surface of the side surface of the guide box 10. Projection 19
To provide. Accordingly, if the connecting conductor plate 16 is inserted along the surface of the partition wall portion 12, the connecting conductor plate 16
Can be mounted on the partition wall portion 12. At this time, the front-back direction of the connecting conductor plate 16 is regulated by the fixing recess 18 in which the front surface of the guide box 10 and the locking piece 16s are locked, and the vertical direction of the connecting conductor plate 16 is defined by the partition wall 12. The connecting conductor plate 16 is regulated by the fixing convex portion 19, and the lateral direction of the connecting conductor plate 16 is the partition wall portion 12.
It is regulated by the rising portion 12s and the side surface portion of the guide box 10. The other connecting conductor plate 17 can be attached in the same manner as the connecting conductor plate 16 side, and 17b
Indicates a contact brush portion of the connection conductor plate 17.

Further, the guide box 10 houses the power plug portion 2 including the ground pin 7. As shown in FIGS. 7 and 8, the power plug unit 2 includes a pair of power plug pins 3,
4 is integrally molded with insulating material R such as synthetic resin (mold)
To do. On the other hand, a part of the insulating material R is extended downward from the lower surface of the power plug portion 2 to integrally form the support arm portion 6, and the pin support portion 6 provided at the lower end of the support arm portion 6 is also formed.
An earth pin 7 is integrally provided on s by insert molding or the like.

Further, the operation knob portion 5 in which the insulating material R is extended is integrally formed on the upper surface of the power plug portion 2. At this time, the operation knob portion 5 is provided with a concave portion M provided on the outer surface Mf of the housing Mh.
s, and a part thereof is projected from the outer surface Mf of the housing Mh by 0.4 mm to 1.2 mm. As shown in FIGS. 4 and 8, the operation knob portion 5 has a flat knob body 5m to be housed in the recess Ms and a slit portion extending downward from the lower surface of the knob body 5m and provided in the recess Ms. Connection conductor plate portion 5c extending through Me to the inside of the housing Mh
And a knob base portion 5b provided at the lower end of the connection conductor plate portion 5c. Then, one end of the knob base portion 5b is continuously formed with respect to the insulating material R of the power plug portion 2. As a result, the operation knob portion 5 is supported by the power plug portion 2 in a cantilever manner, and can be elastically displaced. Further, the to-be-stopped portions 8 ... Are integrally formed on the knob base portion 5b. In this case, since the stopper portions Mx ... And My ... are integrally formed on the inner surface of the upper surface portion on the housing Mh side in correspondence with the use position Pu and the storage position Ph, as shown in FIGS.
Can be selectively locked to the stoppers Mx ... or My. Since the stopper portions 8 ... Are displaced downward by pushing the operation knob portion 5, the stopper portions 8 ...
And the stoppers Mx ... Or My ... are unlocked. Further, the power plug section 2 is integrally provided with a position restriction section 9 for restricting the displaced operation knob section 5.

Further, an insertion hole 32 through which the guide rail portion 20 is inserted is provided in the middle portion of the power plug portion 2. In this case, the shape of the insertion hole 32 when viewed from the front is formed in a T shape that is substantially the same as the cross-sectional shape of the guide rail portion 20.
This allows the power plug portion 2 to be housed in the guide box 10 with the guide rail portion 20 inserted through the insertion hole 32 of the power plug portion 2.
Can slide along the guide rail portion 20. The contact brush portions 16b and 17b contact the lower ends of the power plug pins 3 and 4, respectively. The front side of the guide box 10 has insertion holes through which the power plug pins 3 and 4 and the ground pin 7 are inserted.

Then, the power source input cords 33 and 34 of the electric circuit built in the housing Mh are connected to the connecting conductor plate 1.
The power input cords 33 and 34 are electrically connected to the power plug pins 3 and 4 by connecting them to the connecting portions 16c and 17c of 6 and 17 by soldering or the like. Also, earth cord 3
5 is directly connected to the ground pin 7 by soldering or the like.

Next, the method of using the power plug device 1 according to this embodiment and the functions of the respective parts will be described with reference to FIGS.

First, at the time of use, the operation knob portion 5 is slid so that the operation knob portion 5 is moved to the use position Pu shown in FIG.
If it is moved to, the power plug portion 2 and the ground pin 7 are also moved, and the power plug pins 3 and 4 and the ground pin 7 project outside from the housing Mh. At this time, due to the shapes of the stopper portions 8 ... And the stopper portions Mx ..., The stopper portions 8 ... And the stopper portions Mx. As a result, the power plug pins 3 and 4 and the ground pin 7 can be used by inserting them into a power outlet (not shown).

On the other hand, at the time of storage, if the operation knob portion 5 is pushed and slid in the opposite direction, the stopper portions 8 ... And the stopper portions Mx ... Are unlocked, so that the operation knob portion 5 is stored at the storage position Ph. Can be moved to. As a result, the power plug pins 3 and 4 and the ground pin 7 are housed inside the housing Mh as shown in FIG. At this time, depending on the shapes of the stopper portions 8 ... And the stopper portions Mx ..., The stopper portions 8 ... And the stopper portions Mx.

In any operation, the operation knob 5
Is accommodated in a recess Ms provided on the outer surface Mf of the housing Mh, and a part thereof is 0.4 m from the outer surface Mf of the housing Mh.
Since it protrudes by m to 1.2 mm, unnecessary protrusion of the operation knob portion 5 from the housing Mh is eliminated, and good operability is secured. Then, when the operation knob portion 5 is pushed,
Since the displaced operation knob portion 5 is regulated by the position regulation portion 9, unnecessary displacement of the operation knob portion 5 is prevented. Further, the power supply plug portion 2 is slidably supported by the guide rail portion 20 provided on the guide box 10, and the power supply plug portion 2 moves along the guide rail portion 20. At this time, the left and right sides of the power plug portion 2 are guided by the pair of guide rib portions 21, 21 provided in the guide box 10, and the engaging recessed portion 31 provided at the lower end of the pin support portion 6s is guided by the guide strip 30. Therefore, the power plug portion 2 moves along the guide rail portion 20 without rattling.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, although the example in which the power plug pin and the power input cord are connected via the connection conductor plate is shown, the power plug pin and the power input cord may be directly connected without the connection conductor plate as in the ground pin side. Further, the ground pin and the ground cord may be connected via the connection conductor plate in the same manner as the power plug pin side. Furthermore, although the AC adapter is illustrated as the electric device, the electric device can be similarly applied to any electric device. In addition, the detailed configuration, shape, quantity, material and the like can be arbitrarily changed without departing from the scope of the present invention.

[0035]

As described above, according to the present invention, the pair of power plug pins and the insulating material are integrally molded, and the power plug portion incorporated in the housing of the electric device is slid by the operation knob portion arranged outside the housing. In a power plug device configured to be movable to a use position or a storage position,
A support arm is integrally formed with the insulating material of the power plug part, a ground pin is integrally provided with the pin support part at the tip of the support arm, and an operation knob is integrally formed with another position of the insulating material. Therefore, even when the three-pin type is adopted, there is a remarkable effect that electrical performance and mechanical performance, and further various performances such as safety and reliability can be easily secured.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a power plug device according to the present invention when it is used,

FIG. 2 is a side view, partly in vertical section, of the power plug device when stored;

FIG. 3 is a partially longitudinal rear view of the power plug device,

FIG. 4 is a plan view of an AC adapter including the power plug device.

FIG. 5 is a side view of a connecting conductor plate in the power plug device,

FIG. 6 is a plan view of a guide box in the power plug device,

FIG. 7 is a partially longitudinal side view of a ground pin and a power plug portion of the power plug device,

FIG. 8 is a rear view of the ground pin and the power plug portion of the power plug device,

FIG. 9 is a side view of an AC adapter including the power plug device.

FIG. 10 is a front view of an AC adapter including the power plug device.

[Explanation of symbols]

 1 Power Plug Device 2 Power Plug Part 3 Power Plug Pin 4 Power Plug Pin 5 Operation Knob Part 6 Support Arm Part 6s Pin Support Part 7 Earth Pin 8 Stopped Part 9 Position Restriction Part 10 Guide Box 12 Partition Wall Part 13 First Space Part 14th Two spaces 15 Slit 16 Connection conductor plate 16b Contact brush part 17 Connection conductor plate 17b Contact brush part 18 Fixing concave part 19 Fixing convex part 20 Guide rail part 21 Guide rib part 22 Reinforcing rib part R Insulation material M AC adapter (electrical equipment ) Mh housing Mf outer surface Ms recessed portion Mx stopper portion My stopper portion Pu use position Ph storage position

Claims (11)

[Claims] 1. A pair of power plug pins and an insulating material are integrally molded, and a power plug portion built in a housing of an electric device is brought to a use position or a storage position by sliding an operation knob portion arranged outside the housing. In a movable power plug device, a support arm portion is integrally formed with an insulating material of a power plug portion, a ground pin is integrally provided on a pin support portion at the tip of the support arm portion, and another insulating material is used. A power plug device characterized in that an operating knob portion is integrally molded at the position. 2. The operation knob portion is accommodated in a recess provided on the outer surface of the housing, and a part of the operation knob portion is 0.4 from the outer surface of the housing.
mm-1.2 mm is projected, The claim 1 characterized by the above-mentioned.
The power plug device described. 3. The stopper portion, which is provided so as to be elastically displaceable by continuously forming one end on the power plug portion, and which is capable of being locked with a stopper portion on the housing side corresponding to a use position and a storage position. The power plug device according to claim 1 or 2, further comprising: 4. The power plug device according to claim 1, wherein the power plug part has a position restriction part for restricting the position of the displaced operation knob part. 5. A structure that can be mounted inside a housing,
The power plug device according to claim 1, further comprising a guide box that accommodates a power plug portion including a ground pin. 6. A partition wall having a slit in which a support arm portion passes, as well as forming a first space portion for accommodating a power plug portion and a second space portion for accommodating a ground pin by partitioning an inner space in the guide box. The power plug device according to claim 1 or 5, wherein a portion is provided. 7. The partition wall portion is provided with a pair of connecting conductor plates having a contact brush portion that comes into contact with a power plug pin, and is attached by a fixing concave portion and a fixing convex portion. Power plug device. 8. The guide box is provided above the slit, and is provided with a guide rail portion which is inserted into the power plug portion to slidably support the power plug portion and also serves as a cover. Item 7. A power plug device according to item 1, 5, 6 or 7. 9. The power plug device according to claim 1, wherein the guide box is provided with a pair of guide rib portions for guiding both left and right sides of the power plug portion. 10. The power plug device according to claim 1, wherein the guide box is provided with a reinforcing rib portion for supporting the partition wall portion at a right angle. 11. The power plug device according to claim 1, wherein the electric device is an AC adapter.