JPS649710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power socket in which switching operation between terminals is controlled by inserting and removing a plug.

A power socket, in which an external power source is connected by inserting a plug and at the same time a switch operation between terminals is controlled, is used, for example, to switch between an external power source and an internal power source in a portable radio. Conventionally, sockets that perform this kind of switching by inserting and removing a plug have contact pieces that use a plurality of leaf springs and are arranged facing each other, and when the plug is inserted and removed, one contact piece is switched to another contact piece. Those with a structure that could come into contact with or separate from the other hand were used.

When a leaf spring is used as a contact piece for a switch operation control mechanism, the contact piece itself requires a certain width, which has the disadvantage of increasing the size of the power socket as a whole. Furthermore, the so-called cleaning effect in which the contact pieces rub against each other when they come into contact with each other during the opening/closing operation of the switch is low, and there is a risk that an oxide film or the like may be formed on the contact portions, resulting in malfunction.

Further, the contact pieces are usually silver plated, but it is expensive to silver plate relatively wide leaf springs. The overall assembly work also requires dimensional accuracy of the contact gap, and a considerable number of man-hours are required for its adjustment. Furthermore, unless the biasing force of the contact piece, which is a leaf spring, is not completely adjusted, the driving life of the device will be shortened.

Conventional power sockets have a structure in which the contact pieces are arranged in a direction perpendicular to the arrangement of the power terminal pins, and the movable contact pieces are biased in that direction, so the thickness of the switch part (the dimension in the perpendicular direction mentioned above) becomes thicker. The drawback was that it was difficult to downsize the entire power socket.

Furthermore, in the past, there was a risk that the drive body or switch contact piece in a free state would vibrate or rattle due to external forces such as vibrations, resulting in poor contact or poor switching (deviation in switching timing).

This invention solves the above-mentioned problems with conventional power sockets by using a wire in the switch mechanism and by adopting a unique drive body and conductor segments, making it easy to assemble and downsized, and reducing the number of manufacturing steps. The purpose of the present invention is to provide a power socket that can be used for a long time, has a long operating life, and operates reliably.

According to the present invention, the plurality of wires are attached to the socket body so that the arrangement direction of the pins in contact with the plug coincides with the arrangement direction of the plurality of wires. Further, the drive body is attached to the socket body so that it can freely move in and out of the plug insertion hole provided in the socket body, and the drive unit is inserted and biased into the insertion hole. The wires arranged in this manner are attached to the segments attached to the driving body so as to be pressed against them. When a plug is inserted into the plug insertion hole of the power socket body, the drive part of the drive body is driven by the insertion of the plug, and the on/off operation between these multiple wires is performed by the segment attached to the drive body. will be carried out.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The power socket of the present invention will be described in detail below based on embodiments thereof with reference to the drawings.

Inside a substantially cylindrical rectangular parallelepiped main body 11 with one end plate open, power terminal pins 12-1 and 12-2 are planted parallel to each other approximately at the center of the closed surface. These power terminal pins 12-1, 12
The end of 13-2 passes through this closed surface and is taken out to the outside of the main body 11, and is fixed, for example, by caulking to the closed surface, and the end has power terminals 13-1, 13-2.
2 are attached respectively. Attachment pieces 14-1 and 14-2 are formed by integrally extending both sides of the open surface side of the main body 11 in the right angle direction, and a power socket is provided in the center of each attachment piece 14-1 and 14-2. Attachment holes 15-1 and 15-2 are provided for use in a fixed manner.

The bottom plate 16 of the main body 11 is the power terminal 13-1, 13
-2 side is formed to protrude in the longitudinal direction of the main body 11 from the closed surface. Further, an opening 17 is formed in the longitudinal direction of the main body 11 continuously from the end edge of the bottom plate 16 on the open surface side. Both edges of the bottom plate 16 are integrally extended at right angles to the bottom plate 16 to form guide pieces 18-1 and 18-2. This guide piece 18
-1 and 18-2 are approximately at the center in the longitudinal direction,
The bottom plate 1 is located between the edges of the guide pieces 18-1 and 18-2.
6 and are connected by an end plate 32 parallel to 6. This guide piece 1
8-1, 18-2 mutually opposing inner bodies 11
Engagement grooves 19-1 and 19-2 are formed at the ends of the open surfaces. Further, on the outer surface of the guide pieces 18-1, 18-2, a substantially triangular prism-shaped engagement piece 39- is formed in a direction substantially perpendicular to the surface near the engagement grooves 19-1, 19-2.
1,39-2 is formed. Further information piece 1
Guide pieces 40-1 and 40-2 are formed on a portion of the upper and lower edges of the outer surfaces of the guides 8-1 and 18-2. Further, an engaging piece 3 is provided from the end plate 32 at the longitudinal end of the inner surfaces of the guide pieces 18-1 and 18-2 that face each other.
Guide grooves 42-1, 42- in the 9-1, 39-2 direction
2 is formed.

The drive body 20 is engaged with the engagement grooves 19-1, 19-2 of the main body 11 and rotatably attached around the engagement grooves 19-1, 19-2. The driving body 20 is composed of a cylindrical column 21 having a substantially fan-shaped cross section, and a segment holder 22 fitted into the cylindrical column 21. A portion of the circumferential surface of this cylindrical columnar body 21 protrudes in the radial direction, and a driving portion 21-D is formed there. The drive body 20 is driven by a plug inserted into a plug insertion hole in this drive portion 21-D portion, and rotates around the engagement grooves 19-1 and 19-2.

The segment holder 22 has engaging pieces 23-1 and 23-2 protruding from its longitudinal ends, and a shallow mounting concave surface 24 is formed on a surface that forms part of the circumferential surface of the cylindrical body. Ru. A conductor segment 25 having a corresponding shape is embedded in this concave surface 24 . This conductor segment 2
As shown in FIG. 6, 5 has a shape in which one corresponding corner of a rectangular conductive plate is cut out into a substantially rectangular shape, and the whole is given a curvature corresponding to the concave surface 24. A plurality of grooves 26-1, 26-2, 26- are formed along the circumference on a part of the surface of the cylindrical columnar body 21.
3 are formed parallel to each other on a part of the circumferential surface.

The segment holder 22 is inserted and fitted into the cylindrical column 21, and the cut grooves 26-1 to 26 of the cylindrical column 21 are inserted into the cylindrical column 21.
-3 is fixed so as to be positioned on the conductor segment 25 of the segment holder 22, and the driver 20 is assembled. Engagement pieces 23-1 and 23-2 of the segment holder 22 protruding from the longitudinal opening of the cylindrical columnar body 21 engage the engagement groove 1 of the main body 11.
9-1 and 19-2, and the drive body 20 is rotatably assembled around the engagement grooves 19-1 and 19-2.

Wires 28-1 and 2 are installed along the periphery of one side 29 of the substantially rectangular parallelepiped base 27 at right angles to this side 29.
8-2 and 28-3 are planted parallel to each other. These wires 28-1, 28-2, 28-3 are connected to the base 27
Inside, the wires 28-1, 28- of the base 27 are bent at almost right angles, and the bent ends are connected to the wires 28-1, 28- of the base 27.
2, 28-3 are taken out from a surface 30 which is perpendicular to the surface 29 on which it is planted at a right angle, at an angle slightly inclined with respect to the direction perpendicular to this surface 30. Therefore wire 28
-1, 28-2, 28-3 The end planted perpendicularly to the surface 29 of the base 27 and the other end taken out from the surface 30 form an obtuse angle that is slightly larger than a right angle. .

At the center of the surface 29 of the base 27, a substantially triangular prism-shaped projection 31 is formed at the end on the surface 30 side. Power terminals 13-1, 1 on the bottom plate 16 of the main body 11
The ends of the wires 28-1, 28-2, 28-3 planted perpendicularly from the surface 29 of the base 27 from the 3-2 side are aligned with the extending direction of the guide pieces 18-1, 18-2. The base 27 is attached to the main body 11. In this attached state, the wires 28-1, 28-2,
The ends taken out from the surface 30 of 28-3 are located in the grooves 26-1 to 26-3 of the cylindrical columnar body 21, respectively, and are driven by wires 28-1, 28-2, and 28-3. The body 20 is biased substantially perpendicularly to the bottom plate 16 of the body 11. In this state, the driver 20
The drive portion 21-D is arranged to protrude from the opening 17 into the plug insertion hole of the main body 11. In this case, it is also possible to use a coil spring wound around the drive body 20 to bias the drive unit 21-D out of the opening 17.

For example, a fitting lid 33 made of a transparent resin material is provided, and this fitting lid 33 connects the driving body 20 and the base 27.
Guide piece 18-1, 1 of main body 11 with attached
8-2 side to fix the base 27 to the main body 11.

The fitting lid 33 is close to one end of a substantially rectangular holding plate 34, and has an engaging hole 35 formed in its center, and an end plate 36 formed at the other end at a right angle to the holding plate 34. The width of this end plate 36 is formed to be slightly larger than the width of the holding plate 34, and support pieces 37-1, 37 extend from both widthwise ends of the end plate 36 in the longitudinal direction of the holding plate 34 at right angles to the surface of the end plate 36. -2 is formed. These support pieces 37-1, 37-2 have engaging holes 38-1, 3 continuously formed in their respective centers from the end plate 36 side.
8-2 is formed. Additionally, step portions 41-1, 41-2 are provided along both peripheral edges of the presser plate 34.
is formed. Further, a mounting piece 43 is formed at the substantially center of the holding plate 34 at a right angle to the holding plate 34 and is fitted with, for example, a substrate.

Step portions 41-1, 41 of the holding plate 34 of the fitting lid 33
-2 to guide groove 42 of guide piece 18-1, 18-2-
1, 42-2 and the fitting lid 33.
is attached to the main body 11 using guide pieces 18-1 and 18-2.

Engagement hole 35 of presser plate 34 and protrusion 31 of base 27
and the engagement holes 38-1, 38-2 of the support pieces 37-1, 37-2 are fitted with the guide pieces 18-1, 38-2, respectively.
The fitting lid 33 is disposed so as to press the base 27 into the main body 11 by engaging with the engaging pieces 39-1 and 39-2 of the fitting 18-2. Therefore, the base 27 is fitted into the main body 11, and the wires 28-1, 28-2, 2 of the base 27
8-3 is disposed within the main body 11 with the driving body 20 being biased in a direction perpendicular to the bottom plate 16 of the main body 11.
Furthermore, the fitting cover 33 completely protects the switching portion of the power socket from dust in the atmosphere.

When a power plug is inserted into the plug insertion hole from the open side of the main body 11, the plug and the power terminal pins 12-1 and 12-2 come into electrical contact. At the same time, when the plug is inserted, its tip becomes the drive body 20.
The drive portion 21-D of the drive body 20 protruding from the opening 17 into the plug insertion hole is pushed in the plug insertion direction. Therefore, the driving body 20 is connected to the engagement grooves 19-1, 1
9-2, and the drive unit 21 is rotated through the opening 17.
- The driver 20 rotates and moves to a position where D does not protrude.

For example, before inserting the plug, the wires 28-1 and 28-2 are located on the conductor segment 25 of the segment holder 22, and the wire 28-3 is located on the conductor segment 25, as shown by dotted lines in FIG. It is assumed that there is no state. When the plug is inserted from this state, the driver 20 rotates, the wires 28-2 and 28-3 are positioned on the conductor segment 25 of the segment holder 22, and the wire 28-1 is placed on the conductor segment 25. It will be in a state where it is not located. Therefore, wire 2 before plug insertion
After the plug is inserted, the contact state between the wires is changed from the state in which wires 8-1 and 28-2 are in contact to the state in which wires 28-2 and 28-3 are in contact, and the switch operation is controlled.

This switching is achieved by sliding contact between the conductor segment 25 of the segment holder 22 and the wire as the driving body 20 rotates, and the switching is performed extremely smoothly without applying unreasonable stress. It will be done. Also, since the contact piece is made of wire, its width is significantly smaller than that of the conventional one.
The area to be silver plated also becomes smaller. This significantly reduces the material costs involved in manufacturing.

In addition, since the contact between the wire and the conductor segment 25 of the segment holder 22 is made by sliding switching, the cleaning effect of the contact portion during sliding switching between them is large, and deterioration of the contact portion due to the formation of an oxide film is prevented. Ru. Furthermore, there is no need to adjust the gap between the contact parts, and assembly is easy. In addition, when manufacturing the device, the main body, the driver, and the base to which the wires are attached are manufactured separately, and these are easily assembled to each other, thereby allowing rapid mass production.

As explained in detail above, according to the present invention, wires are used in place of the conventional leaf springs, and these wires are arranged along the arrangement direction of the power terminal pins, unlike the conventional ones. Rather than turning the contact pieces on and off directly by biasing the movable contact piece in a direction perpendicular to the arrangement of the terminal pins, the structure turns the contact piece on and off via a conductor segment that is rotated by the rotation of the drive body. Since the amount of deviation in the direction perpendicular to the pin arrangement can be made considerably smaller than in the past, the thickness of the switch portion can be made thinner than in the past, and the entire power socket can be made smaller.

In addition, the structure is such that all the wires come into elastic contact with the driving body and collectively apply biasing force to the driving body, and instead of only the movable contact pieces applying biasing force to the driving body as in the past, each wire The mechanical load per spring is reduced, and the cross-section of the wire can therefore be made much smaller than that of conventional leaf springs, which greatly contributes to the miniaturization of power sockets.

Since the cross-section of the wire can be made much smaller than in conventional leaf springs, less silver plating is required, which reduces material costs accordingly. Furthermore, since the system does not directly turn on and off between the wires, there is no need to accurately adjust the gap between the contact pieces as in the conventional case. Therefore, the number of assembly steps can be reduced accordingly.

In this invention, all the wires and the driving body are not mechanically free, and all the wires are always in elastic contact with the driving body, and the wires are not directly brought into contact with each other, so they are resistant to vibration and do not vibrate like the conventional ones. There is no risk of poor contact or poor switching of the switch part due to external forces such as

In addition, in this invention, the moving body segment and the wire are configured to be in sliding contact, so the cleaning effect is large, and there is no risk of oxidized film forming on the contact area and causing contact failure or switching failure as in the past. There isn't. In addition, excessive stress is not applied to the switching contact portion during the operation, the operation is smooth, and the operating life is significantly extended.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the power socket of the present invention, where A is a front view, B is a side view, C is a bottom view, D is a rear view, and FIG. 2 is a view taken along A-A in FIG. The sectional view and FIG. 3 are views showing the structure of the main body of the embodiment of the power socket of the present invention, in which A is a front view, B is a side view,
C is a bottom view, D is a back view, and Figure 4 is A- in Figure 3.
A is a sectional view, and FIG. 5 is a diagram showing the structure of a segment holder in an embodiment of the power socket of the present invention. A is a front view, B is a side view, C is a rear view, and D is a C
FIG. 6 is a diagram showing the structure of the segment in the embodiment of the power socket of this invention, A is a front view, B is a side view, and FIG. 7 is a diagram showing the structure of the segment in the embodiment of the power socket of this invention. In the diagrams showing the structure of a cylindrical columnar body, A is a front view, B is a side view, and C is A-A of A.
FIG. 8 is a sectional view showing a state in which wires are attached to the base in an embodiment of the power socket of the present invention, in which A is a front view, B is a side view, C is a top view, and FIG.
The figures show the structure of the fitting lid in the embodiment of the power socket of the present invention, in which A is a front view, B is a top view,
C is a bottom view, D is a side view, and E is an AA sectional view of A. 11: Main body, 12-1, 12-2: Power terminal pin, 20: Driver, 21: Cylindrical column, 22: Segment holder, 25: Conductor segment, 28-
1, 28-2, 28-3: Wire.

Claims (1)

[Scope of Claims] 1. In a power socket in which an on/off operation is performed by driving a driving part of a driving body by inserting a plug into a plug insertion hole provided in a main body, A plurality of elastic conductive wires are provided in the main body and run approximately in the insertion/removal direction of the plug within the switch section, and these wires are connected to the two power terminal pins set up in the plug insertion hole. arranged in the arrangement direction, and the drive body is made of an insulating material and is held in the switch portion so as to be rotatable about an axis parallel to the power terminal pin arrangement direction and substantially perpendicular to the plug insertion/removal direction. , the circumferential surface of the driving body has an arcuate shape eccentric to the center of rotation, a conductor segment is attached to the circumferential surface, and the plurality of wires are elastically attached to the circumferential surface of the driving body from the same direction. when the inserted plug is removed from the plug insertion hole, the driving body is rotated by the elastic force of the wire, and the driving part of the driving body is projected into the plug insertion hole, When the driver is rotated by inserting the plug, the distance between the center of rotation and the contact point of the wire becomes larger, and the conductor segment is rotated by inserting or removing the plug. A power supply socket that slides on the wires, and the at least two wires are electrically connected and disconnected via the conductor segment at rotational angular positions of the driver before and after plug insertion.