JP3096896B2 - Power plug device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply plug device provided in an AC adapter, a battery charger, and the like that can selectively displace a plug pin portion to a use position or a storage position.

[0002]

2. Description of the Related Art Conventionally, as a power plug device configured to selectively displace a plug pin portion to a use position or a storage position, for example, a power plug provided in an AC adapter disclosed in Japanese Patent Application Laid-Open No. 3-147283 is disclosed. Devices are known.

In the power plug device disclosed in the publication, a terminal portion is rotatably supported inside a casing,
In addition, the pair of plug pins in the terminal are exposed to the outside from the opening of the casing, so that the plug pins are selectively displaced to the use position or the storage position. In addition, there is a click mechanism for holding the terminal portion at the use position and the storage position, and the click mechanism is configured such that the protrusion provided integrally with the terminal portion and the tip of the protrusion at the use position and the storage position are perpendicular to each other. It is constituted by a projecting piece that touches.

[0004]

However, the click mechanism provided in the above-described conventional power plug device has the following problems.

[0005] First, a large click force (holding force) and a good click feeling are difficult to obtain because only the protrusion comes into contact with one protruding piece from a direction perpendicular thereto. Further, the terminal portion cannot be stably held, and in particular, rattling tends to occur in the left-right direction.

Secondly, since the click force depends on one piece of projection, the degree of freedom in design with respect to the click force is reduced, and an optimum click force according to the weight of the device to which the power plug device is attached is determined. Difficult to set.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems existing in the prior art, and provides a good click feeling and a large click force, as well as stabilization of holding of a terminal portion and prevention of rattling. It is another object of the present invention to provide a power plug device capable of easily setting an optimum click force according to the weight of the attached device.

[0008]

According to the present invention, the terminal portion 2 is rotatably supported inside the casing C, and the plug pin portions 3a, 3b of the terminal portion 2 are provided.
Is exposed to the outside through the opening S of the casing C, and the plug pins 3a and 3b are moved to the use position Pu or the storage position Pi.
To the position of use Pu
When configuring the power plug device 1 having the click mechanism 4 for holding the terminal unit 2 at the storage position Pi,
In particular, a pair of rib portions 5 and 6 provided on the casing C and opposed to each other in parallel with the axial direction of the terminal portion 2 and between the rib portions 5 and 6 provided on the terminal portion 2 and at the use position Pu and the storage position Pi. The click mechanism 4 is constituted by the boss portions 7 and 8 which enter into the ribs and are locked to the respective rib portions 5 and 6.

In this case, according to a preferred embodiment, the boss portions 7 or 8 are locked in parallel with the rising directions of the respective rib portions 5 and 6. The bosses 7, 7 are provided on the opposite surfaces of the ribs 5, 6.
In addition to providing concave surfaces 5a and 6a to which the lock 8 is engaged, the ribs 5 and 6 are further provided with guide surfaces 5b, 5c, 6b and 6c for guiding the bosses 7 and 8 to enter. In addition,
The ribs 5 and 6 are desirably provided on a casing surface Cf opposite to the casing surface where the plug pin portions 3a and 3b are exposed. On the other hand, the boss portions 7 and 8 are formed in a round bar shape.

Thus, if the plug pin portions 3a and 3b are selectively displaced to the use position Pu or the storage position Pi,
The bosses 7 and 8 provided on the terminal 2 are also displaced integrally,
The displaced boss 7 enters the use position Pu, and the boss 8 enters the storage position Pi between the pair of ribs 5 and 6 provided on the casing surface Cf, respectively. , 6. At this time, the bosses 7, 8 first come into contact with the tips of the ribs 5, 6 in an inclined state, and then gradually slide toward the roots of the ribs 5, 6, and finally each of the ribs 5, 6 5 and 6 are locked in parallel to the upright direction. Therefore, when the bosses 7 and 8 are engaged with the ribs 5 and 6, a relatively small force is sufficient.
Since the boss portions 7 and 8 are sandwiched between the bosses 6 and 6 in parallel, the engagement area (contact area) increases, and as a result, a good click feeling and a large click force (holding force) can be obtained. Such an operation is further improved by providing the ribs 5 and 6 with the concave portions 5a and 6a and the guide surfaces 5b, 5c, 6b and 6c. In addition, since the displacement of the boss portions 7 and 8 in the left and right directions (the direction perpendicular to the rotation direction of the terminal portion 2) is restricted by the rib portions 5 and 6, the terminal portion 2 is stably held. Even if rattling exists between the terminal portion 2 and the casing C, the rattling is suppressed. On the other hand, since the boss portions 7, 8 and the respective rib portions 5, 6 are locked in parallel, if the length of the interlock between the boss portions 7, 8 and the respective rib portions 5, 6 is selected, the power plug device 1 It is possible to easily set an optimum click force according to the weight or the like of the device to which the tag is attached. In this case, the rib portions 5, 6 are connected to the plug pin portions 3a, 3b.
If it is provided on the casing surface Cf on the opposite side to the casing surface where is exposed, the lengths of the boss portions 7 and 8 and the rib portions 5 and 6 can be easily secured, and the design flexibility and versatility can be further enhanced. .

[0011]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, an overall schematic configuration of an AC adapter including the power plug device 1 according to the present embodiment will be described with reference to FIG.
This will be described with reference to FIG.

In the figure, M denotes an AC adapter, which comprises a casing C composed of an upper casing half-body Cu and a lower casing half-body Cd. FIG. 7 (similarly in FIGS. 1 and 2)
Shows the casing C upside down. The circuit board 50 is housed inside the casing C. Circuit board 50
A DC power supply is configured by mounting various components such as a power transformer and an electric circuit element (not shown). On the other hand, a DC output cord 51 is connected to the DC output side of the circuit board 50, and this DC output cord 51 is led out of the casing C to the outside. Further, a pair of connection fittings 52a are soldered to the printed pattern on the AC input side of the circuit board 50. Each of the connection fittings 52a is formed by bending a single conductive plate into a U-shape, and furthermore, by bending both end sides into a U-shape so as to be in contact with each other. On the other hand, it is possible to connect or disconnect the contact terminal portions 15a to be described later. The power plug device 1 according to the present embodiment is disposed on the bottom surface on one end side of the lower casing half Cd.

Next, the configuration of the power plug device 1 according to the present embodiment will be specifically described with reference to FIGS.

The power plug device 1 has a terminal portion 2 formed separately from the casing C. Terminal 2
As shown in FIG. 3, a pair of parallel conductive pin members 13a and 13b are integrally formed of an insulating material 14 such as a synthetic resin. In this case, one end sides of the pin members 13a and 13b become a pair of plug pin portions 3a and 3b,
The other end is a contact terminal portion 15a, 15b continuous with the plug pin portion 3a, 3b. The contact terminals 15a can be connected to or disconnected from the connection fittings 52a depending on the positions of the plug pins 3a, 3b. Further, on both left and right sides of the insulating member 14, there are provided shaft portions 16, 17 protruding in a direction perpendicular to the pin members 13a, 13b.

On the other hand, inside the casing C, a bearing portion 1 for rotatably supporting the shaft portions 16 and 17 of the terminal portion 2 is provided.
1 and 12 are provided. The bearing portions 11 and 12 are a pair of left and right bearing halves 11 integrally formed on the inner surface of the lower casing half Cd.
d and 12d, and a pair of left and right bearing halves 11u and 12u integrally formed on the inner surface of the upper casing half-body Cu. When the casing half-body Cu and Cd are assembled, the bearing halves 11d and 11u are assembled. The bearing portions 11 and 12 are formed by combining the bearing halves 12d and 12u, respectively.

A housing recess 18 for housing the plug pins 3a and 3b is provided on the outer surface of the bottom surface on one end side of the lower casing half Cd, and the plug pins 3a and 3b are partially provided on the housing recess 18. An opening S to be exposed to the outside is provided. Therefore, if the shaft portions 16 and 17 of the terminal portion 2 are rotatably supported by the bearing portions 11 and 12, the plug pin portions 3a and 3b can be stored in the storage position P stored in the storage recess 18.
i and 90 ° from this storage position Pi, and can be displaced to a use position Pu projecting perpendicularly from the bottom surface of the lower casing half Cd.

On the other hand, a click mechanism 4 constituting a main part of the present invention is provided between the terminal part 2 and the casing C.
The click mechanism 4 is provided integrally with the casing C, and a pair of rib portions 5 and 6 facing each other in parallel with the axial direction (left and right direction) of the terminal portion 2, and a pair of front and rear boss portions provided integrally with the terminal portion 2. 7 and 8. The rib portions 5 and 6 are provided so as to stand on the casing surface Cf opposite to the casing surface from which the plug pin portions 3a and 3b protrude, that is, on the inner surface of the bottom surface of the upper casing half-body Cu. Each rib part 5,
As shown in FIG. 4, concave portions 5a, 6a with which the bosses 7 or 8 are engaged are provided on the surfaces facing each other, and the front and rear directions of the concave portions 5a, 6a, that is, the rotation of the terminal portion 2, On both sides in the movement direction, inclined guide surface portions 5b, 5c, 6b, 6c for guiding the bosses 7, 8 to enter are provided, respectively. Therefore, two front and rear ridges are formed on the opposing surfaces of the rib portions 5 and 6, respectively. Therefore, by setting the interval between the opposing ridges between the rib portions 5 and 6, the boss portion is formed. 7, 8 can be clicked and locked.

On the other hand, each of the bosses 7 and 8 is formed in a round bar shape.
Projections are formed from the center of the terminal portion 2 in a direction perpendicular to the shaft portions 16 and 17. The bosses 7 and 8 are arranged in a right angle relationship. As a result, the boss 7 is locked between the ribs 5 and 6 at the use position Pu of the plug pin portions 3a and 3b, and the boss 8 is locked between the ribs 5 and 6 at the storage position Pi. In addition, 2
Reference numerals 1 ... denote reinforcing parts.

By configuring the click mechanism 4, the ribs 5, 6 and the bosses 7, 8 are locked in parallel. Therefore, the rib portions 5, 6 and the boss portions 7, 8
By selecting the length of the power plug device 1, it is possible to easily set the optimum click force according to the weight of the device to which the power plug device 1 is attached. That is, in FIG. 5, when the length of the boss portion 7 is selected to be Lo, the length locked to the rib portions 5 and 6 is Ls. Therefore, if the length of Lo is arbitrarily selected, the length of Ls changes, and an arbitrary magnitude of click force can be set. This point is the same even if the lengths of the rib portions 5 and 6 are changed. Further, the bosses 7 and 8 may have different lengths. For example, in FIG. 5, if the length of the boss 8 is selected to be longer than the length of the boss 7 by Le,
The click force (holding force) at the storage position Pi is used at the use position Pu.
Can be larger than that of Thus, the rib portions 5
The click force can be arbitrarily and easily set by selecting the length of the bosses 6 and the bosses 7 and 8.

Next, a method of assembling the AC adapter M including the power plug device 1 according to the present embodiment and a method of using the AC adapter M including the functions of the power plug device 1 will be described with reference to the drawings.

First, an assembling method will be described. First, the circuit board 50 and the DC output cord 51 are attached to the upper casing half-body Cu. Further, the plug pins 3a and 3b of the terminal 2 are connected to the lower casing half C.
d into the opening S from the inside of the lower casing half C
d, and the shaft portions 16 and 17 of the terminal portion 2 are connected to the bearing half portions 11d and 11u, 12d and 12u.
The lower casing half-body Cd and the upper casing half-body Cu are attached to each other. Thus, the assembly is completed.

Next, the method of use will be described. First,
In use, as shown by solid lines in FIGS. 1 and 2, the plug pins 3a and 3b are pulled out of the housing recess 18 and are displaced by 90 ° in the direction of arrow H1 shown in FIG.
If the plug pins 3a, 3b are erected at right angles to the bottom surface of the lower casing half Cd, the plug pins 3
a and 3b are used positions P. In this case, the boss portion 8 of the terminal portion 2 is pulled out of the rib portions 5 and 6, and the boss portion 7 enters between the rib portions 5 and 6 and is locked in a click manner. At this time, the boss portion 7 first comes into contact with the tips of the rib portions 5 and 6 in an inclined state, and gradually the guide surface portions 5b and 6
While sliding along the roots of the ribs 5 and 6 while being guided by the groove b, it is locked parallel to the concave surfaces 5a and 6a. Therefore, when the boss 7 is locked to the ribs 5 and 6, a relatively small force is sufficient, and after the locking, the boss 7 is sandwiched between the ribs 5 and 6 in parallel. Click feeling and large click force (holding force) are obtained. Also, the terminal section 2 is stably held, and
The boss 7 is restricted from being displaced in the left-right direction,
Rattling is suppressed.

On the other hand, when not in use, as shown by the phantom line in FIG. Pi. in this case,
The boss portion 7 of the terminal portion 2 is pulled out of the rib portions 5 and 6, and the boss portion 8 is displaced in the direction of arrow H2 shown in FIG. .

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment,
The configuration, shape, material, quantity, and the like of the details can be arbitrarily changed without departing from the gist of the present invention.

For example, one boss is provided and two pairs of ribs are provided. Alternatively, a boss is provided on the casing.
A configuration in which a rib portion is provided in the terminal portion can be regarded as an equivalent range of the present invention. Further, forming the boss portion in a round bar shape is a concept including a case where the cross section is formed in an elliptical or semicircular shape. Furthermore, although the AC adapter has been illustrated, the present invention can be applied to any other device such as a battery charger.

[0027]

As described above, the power plug device according to the present invention is provided on the casing, and is provided on the terminal portion with a pair of rib portions facing in parallel with the axial direction of the terminal portion. Since there is provided a click mechanism having a boss portion which enters between the rib portions at the position and is locked to each rib portion, the following remarkable effects are obtained.

When the boss is locked to the rib, a relatively small force is sufficient, and the boss after locking is sandwiched between the ribs in parallel, so that a good click feeling and a large click force (holding) are obtained. Force) and the displacement of the boss portion in the left-right direction is regulated, so that the terminal portion can be held stably and rattling can be suppressed.

Since the boss portion and each rib portion are locked in parallel, if the length of interlocking between the boss portion and each rib portion is selected,
An optimum click force can be easily set according to the weight of the device to which the power plug device is attached.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional rear view of the power plug device according to the present embodiment (cross-section taken along line AA in FIG. 2);

FIG. 2 is a partial cross-sectional side view of the power plug device.

FIG. 3 is a perspective view showing a terminal portion and a click mechanism of the power plug device.

FIG. 4 is a cross-sectional view of a rib portion and a boss portion in the click mechanism.

FIG. 5 is an explanatory diagram showing a relationship between a rib portion and a boss portion in the click mechanism;

FIG. 6 is an external bottom view of the power plug device,

FIG. 7 is a partial sectional side view including a circuit board of the power plug device,

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power plug device 2 Terminal part 3a Plug pin part 3b Plug pin part 4 Click mechanism 5 Rib part 5a Concave surface part 5b Guide surface part 5c Guide surface part 6 Rib part 6a Concave surface part 6b Guide surface part 6c Guide surface part 7 Boss part 8 Boss part C Casing Cf Casing Surface S Opening Pu Usage position Pi Storage position

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/46 H01R 31/06

Claims (6)

(57) [Claims] A terminal portion is rotatably supported inside a casing, and a plug pin portion of the terminal portion is exposed to the outside from an opening of the casing, and the plug pin portion is selectively moved to a use position or a storage position. A power plug device having a click mechanism for holding the terminal portion in the use position and the storage position, the power plug device being provided in the casing, and being opposed to each other in parallel with the axial direction of the terminal portion. And a click mechanism provided at the terminal portion and having a boss portion which enters between the rib portions at the use position and the storage position and is locked to each rib portion. Plug device. 2. The power plug device according to claim 1, wherein said boss portion is locked in parallel with a rising direction of each rib portion. 3. The power plug device according to claim 1, wherein said rib portion has a concave surface on said surface facing said boss. 4. The power plug device according to claim 1, wherein the rib portion has a guide surface portion for guiding the entry of the boss portion. 5. The power plug device according to claim 1, wherein the rib portion is provided on a casing surface opposite to a casing surface on which the plug pin portion is exposed. 6. The power plug device according to claim 1, wherein the boss is formed in a round bar shape.