JPH07130429A - Receptacle for electronic equipment - Google Patents

Abstract

PURPOSE:To provide a receptacle for electronic equipment with which noise radiated from a connected power supply cable can be reduced. CONSTITUTION:Two connection terminals 2, 2 insulated from each other are fixed on a housing 1 of a U-shaped cross sectional surface comprising resin. A grounding terminal 3 insulated from the connection terminals 2, 2 is fixed on the housing 1. A flange 1a of an almost rectangular form is formed around one end of the housing 1 on the plug insertion side. Stoppers 1b, 1b of an almost rectangular form are formed in both side surfaces of the housing 1 to be extended from the opposite side of the flange 1a toward the flange 1a forming an acute angle to the side surface of the housing 1. A flat surface part 4a of a conductive plate material 4 is fixed on the grounding terminal 3 to get in surface contact using a screw 5. A flat surface part 4b provided in the conductive plate material 4 is fixed to get in surface contact with a metal case by a screw 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet for electronic equipment having a ground terminal used for connection with a power source.

[0002]

2. Description of the Related Art Conventionally, AC power supplies (AC1
There is a connector equipped with an outlet as an output connector for supplying electric power to a power supply unit or the like from the input connector by connecting the electric power source (00V) to the input connector. As shown in FIG. 7, the outlet 70 is provided with a housing 71 having a substantially U-shaped cross section, two connecting terminals 72, 72 attached to the housing 71 and insulated from each other, and attached to the housing 71 for connection. Ground terminal 7 insulated from terminals 72 and 72
3 and 3. A rectangular flange 71a is formed on the outer periphery of one end of the housing 71 on the plug insertion side. The housing 71 and the flange 71a
Are integrally molded of resin.

The outlet 70 is mounted by fitting a portion of the housing 71 on the side opposite to the flange 71a into a rectangular mounting hole provided in a metal case (not shown). That is, the housing 71 is pushed in until the flange 71a of the housing 71 comes into contact with the periphery of the mounting hole of the metal case, and stoppers 71b and 71b provided on both side surfaces of the housing 1 (only one is shown in FIG. 7). It is fixed to the metal case by. Then, a wire 74 having a large surface area is attached to the ground terminal 73.
Solder one end of the wire to the other end of the wire 74
Crimp the crimp terminal 76 and the metal case with the screw 7
It fixes with 5, and the ground terminal 73 of the outlet 70 and the metal case are connected with the wire 74.

As shown in FIGS. 7 and 9A and 9B, the power cable 90 inserted into the outlet 70 is covered with a shield material (not shown), and the shield material is a plug 91. It is connected to a metal case (not shown) via the ground pin 93, the ground terminal 73 of the connector 70, and the wire rod 74. By grounding the metal case, the shield material of the power cable 90 is kept at the ground potential. Therefore, the operating frequency of the circuit board in the metal case is high, noise is radiated from the circuit board, and the power line (not shown) in the metal case
Even if noise is induced in the power source, the radiation of noise from the power cable 90 inserted into the outlet 70 is suppressed by the shield material.

As another measure for suppressing noise radiation, as shown in FIG. 8, a power line 81 connected to the connection terminals 72, 72 of the outlet 70 is passed through the inner circumference of the ferrite core 82 to There is something wrapped around. That is, the line filter is inserted in the power supply line 81. The ferrite core 82 reduces noise propagating to the outlet 70 side through the power supply line 81.

[0006]

By the way, the former ground terminal 73 and a metal case (not shown) are connected to the wire rod 74.
In the case of the outlet 70 connected by, the wire rod 74 has an inductance and the contact resistance between the metal case and the crimp terminal 76 of the wire rod 74. Therefore, the impedance for the high frequency between the metal case and the shield material of the power cable 90 is high, and the ground potential of the shield material of the power cable 90 is not stable, so that the noise radiated from the power cable 90 is sufficient. I can't hold back. Therefore, the noise level radiated from the power cable 90 becomes high, and the noise regulation standard may not be satisfied.

Further, in the latter case of the outlet 70 in which the power supply line 81 is wound around the ferrite core 82, there is a limit to the reduction of noise propagating to the power supply line 81, so that the noise cannot be significantly reduced. Further, there is a drawback that the cost increases due to the expensive ferrite core 82 and the work of winding the power supply line 81 around the ferrite core 82.

In any of the above cases, FIGS. 9 (a) to 9 (c)
As shown in FIG. 3, since one blade receiver 96 of the ground terminal 73 and the ground pin 93 on the plug 91 side have a large contact resistance at one point contact, the ground potential of the shield material of the power cable is not stable, There is a problem that the level of noise radiated from the cable becomes high.

Therefore, an object of the present invention is to reduce the resistance and the inductance between the ground terminal and the metal case, and to connect the ground terminal and the ground pin on the plug side at multiple points to connect the connected power cable. An object of the present invention is to provide an outlet for electronic equipment that can reduce noise radiated from the electronic equipment.

[0010]

In order to achieve the above object, an electronic device outlet according to claim 1 comprises a housing,
At least two connecting terminals fixed in the housing and insulated from each other, and fixed in the housing;
In an outlet of an electronic device including the connection terminal and an insulated ground terminal, a conductive portion having a flat surface portion in surface contact with the ground terminal at one end and a flat portion capable of surface contact with another member at the other end It is characterized by having a flexible plate material.

According to a second aspect of the present invention, there is provided an electrical outlet of an electronic apparatus, a housing, at least two connection terminals fixed in the housing and insulated from each other, and fixed in the housing to be insulated from the connection terminals. An outlet of an electronic device including a ground terminal is characterized in that the ground terminal has a flat surface portion capable of making surface contact with another member.

According to a third aspect of the present invention, there is provided an electronic device outlet in which a housing, at least two connection terminals fixed in the housing and insulated from each other, and fixed in the housing are insulated from the connection terminals. In an outlet for an electronic device, which is equipped with a ground terminal and is fitted and fixed from the outside into a mounting hole provided in a metal case, a flange is formed on the outer periphery of one end of the housing on the plug insertion side, and at least the metal of the flange is formed. The part that contacts the case is electrically conductive and is electrically connected to the ground terminal.

According to a fourth aspect of the present invention, there is provided an electrical outlet of an electronic device, a housing, at least two connecting terminals fixed in the housing and insulated from each other, and fixed in the housing to be insulated from the connecting terminals. In an outlet for an electronic device, which is equipped with a ground terminal and is fitted and fixed from the outside into a mounting hole provided in a metal case, a flange formed on the outer periphery of one end of the housing on the plug insertion side, and a plug insertion of the flange. It is characterized in that it is provided with a conductive connecting member having a flat surface portion that comes into contact with the surface opposite to the side and a connection portion that makes surface contact with the ground terminal.

According to another aspect of the present invention, there is provided an outlet for an electronic apparatus, wherein a ground terminal connected to the ground pin on the plug side is provided with at least three blade receivers that come into contact with the ground pin.

According to a sixth aspect of the present invention, there is provided an outlet for an electronic device, wherein a ground terminal connected to the ground pin on the plug side is provided with a substantially cylindrical blade receiver having a plurality of protrusions in contact with the ground pin on its inner circumference. Is characterized by.

[0016]

According to the outlet of the electronic apparatus of the present invention, the flat surface of one end of the conductive plate is brought into surface contact with the ground terminal, and the flat surface of the other end is another member such as a metal case. When they are brought into surface contact, the resistance between the ground terminal and the metal case becomes smaller and the inductance also becomes smaller than in the case where the ground terminal and the metal case are connected by a wire. The shield material that covers the power cable connected to the plug insertion side of the outlet is connected to the metal case via the ground terminal and the plate material, and the metal case is grounded to provide the shield material for the power cable. Be sure to ground. For this reason,
Even if noise is induced in the power line in the metal case connected to the connection terminal by noise radiated from the circuit board or the like, the resistance between the ground terminal and the metal case is low and the inductance is low. Therefore, the ground potential of the shield material covering the power cable is kept stable. Therefore, the ground potential of the shield material of the power cable is kept stable, so that the radiation of noise from the power cable is suppressed to a low level.

In this way, the radiation level of noise from the power cable connected to this outlet can be reduced.
Further, instead of connecting the ground terminal and the metal case with a wire material, they can be easily connected with a plate material, and without the use of an expensive ferrite core, it is possible to eliminate the work of winding the power supply line around the ferrite core. A costly outlet for electronic devices can be realized.

According to the outlet of the electronic apparatus of the present invention, when the plane portion of the ground terminal is brought into surface contact with another member such as a metal case, a wire is provided between the ground terminal and the metal case. The resistance between the ground terminal and the metal case is smaller and the inductance is smaller than that in the case where the connection is made with. Then, for example, the shield material that covers the power cable connected to the plug insertion side of this outlet is connected to the metal case through the ground terminal, and by grounding the metal case,
Make sure that the shield material of the power cable is grounded. Therefore, even if noise is induced in the power supply line in the metal case connected to the connection terminal by noise radiated from the circuit board etc., low resistance is maintained between the shield material of the power cable and the metal case. In addition, since it has a low inductance, the ground potential of the shield material covering the power cable is kept stable. Therefore, the ground potential of the shield material of the power cable is kept stable, so that the radiation of noise from the power cable is suppressed to a low level.

Thus, the radiation level of noise from the power cable connected to this outlet can be reduced.
Further, instead of connecting the ground terminal and the metal case with a wire material, the ground terminal can be directly connected to the metal case, and without the use of an expensive ferrite core, it is possible to eliminate the work of winding the power supply line around the ferrite core. It is possible to realize a low-cost outlet for electronic equipment.

According to another aspect of the present invention, there is provided an outlet for an electronic device, wherein the housing is fitted into a mounting hole provided in a metal case from the outside, and a flange formed on the outer periphery of one end of the housing on the plug insertion side is provided. Fix it so that it contacts the metal case. At least a portion of the flange that comes into contact with the metal case is electrically conductive, and further electrically connects the electrically conductive portion of the flange and the ground terminal, and the ground terminal and the metal case are electrically connected to the flange. Are electrically connected via a portion having.
Since the side surface of the flange and the metal case are in surface contact with each other, the resistance and inductance between the ground terminal and the metal case are low. Then, the shield material that covers the power cable connected to the plug insertion side of this outlet is connected to the metal case through the ground terminal, and the metal case is grounded to ensure the shield material of the power cable. Ground. Therefore, even if noise is induced in the power supply line in the metal case connected to the connection terminal by radiation noise from the circuit board etc., the ground potential of the shield material covering the power supply cable is kept stable, and the power supply line is kept stable. Suppresses the radiation of noise transmitted from the power cable to the power cable via the connection terminal.

In this way, the radiation level of noise from the power cable connected to this outlet can be reduced.
Further, since the ground terminal and the metal case are electrically connected by fitting and fixing the outlet into the mounting hole of the metal case, the work of connecting the ground terminal and the metal case can be simplified.

Further, according to the outlet of the electronic device of the fourth aspect, the housing is fitted into the mounting hole provided in the metal case from the outside. At this time, the flat surface portion of the conductive connecting member that contacts the surface of the flange opposite to the plug insertion side is sandwiched between the flange and the metal case, and comes into surface contact with the metal case. On the other hand, since the connecting portion of the conductive connecting member is in surface contact with the ground terminal, the ground terminal and the metal case are electrically connected via the conductive connecting member. Since the flat portion of the conductive connecting member and the metal case are in surface contact with each other, and the connecting portion of the conductive connecting member and the ground terminal are in surface contact with each other, there is low resistance between the ground terminal and the metal case. And low inductance. The shield material that covers the power cable connected to the plug insertion side of the outlet is connected to the metal case through the ground terminal and the connecting member, and the metal case is grounded to provide a shield material for the power cable. Be sure to ground. Therefore, even if noise is induced in the power line in the metal case connected to the connection terminal by radiation noise from the circuit board etc., the ground potential of the shield material covering the power cable is kept stable and The radiation of noise transmitted to the power cable via the connection terminal is kept low.

Thus, the radiation level of noise from the power cable connected to this outlet can be reduced.
In addition, this outlet is fitted and fixed in the mounting hole of the metal case, and the flat surface portion of the conductive connecting member makes surface contact with the metal case, and the connecting portion of the connecting member and the ground terminal make surface contact, thereby Since the terminal is electrically connected to the metal case via the connecting member, the work of connecting the ground terminal and the metal case can be simplified.

Further, according to the outlet of the electronic apparatus of the fifth aspect, the ground pin on the plug side comes into contact with at least three blade receivers of the ground terminal. Therefore, the resistance between the ground terminal and the ground pin of the plug is reduced by the multi-point contact between the ground terminal and the ground pin on the plug side.

Therefore, when the ground terminal is surely grounded via, for example, a metal case, the ground potential of the shield material connected to the ground pin of the plug of the power cable is stabilized and the power from the power cable is removed. The noise radiation can be suppressed to a low level.

According to another aspect of the present invention, the plug-side ground pin is inserted into the inner circumference of the substantially cylindrical blade receiver of the ground terminal, and a plurality of inner circumferences of the ground terminal are provided. The protrusion and the outer circumference of the ground pin make multi-point contact. Therefore, the resistance between the ground terminal and the ground pin on the plug side becomes small.

Therefore, when the ground terminal is surely grounded via, for example, a metal case, the ground potential of the shield material connected to the ground pin of the plug of the power cable is made stable and the ground potential from the power cable is removed. The noise radiation can be suppressed to a low level.

[0028]

Embodiments of the electronic equipment of the present invention will be described in detail below with reference to embodiments.

(First Embodiment) FIG. 1 shows a perspective view of an outlet 10 of an electronic apparatus according to a first embodiment of the present invention.
Reference numeral 1 denotes a housing made of a resin having a substantially U-shaped cross section, and 2 is fixed to portions of the housing 1 which are parallel to each other.
Two connection terminals 3 which are insulated from each other are ground terminals which are fixed to the central portion of the housing 1 having a substantially U-shaped cross section and are insulated from the connection terminals 2 and 2. A substantially rectangular flange 1a is formed on the outer periphery of one end of the housing 1 on the plug insertion side. Also, the housing 1
Stoppers 1b, 1b (only one of which is shown in FIG. 1) having a substantially rectangular shape extending from the opposite side of the flange 1a toward the flange 1a side so as to form an acute angle with the side surface of the housing 1. Is forming. The flat portion 4a of the conductive plate member 4 is fixed to the ground terminal 3 by using a screw 5. A flat surface portion 4a of the conductive plate member 4 is provided with a flat surface portion 4b having a predetermined angle with the flat surface portion 4a and capable of making surface contact with another member.

The outlet 10 of the electronic device having the above structure is
It is fitted and fixed from the outside in a substantially rectangular mounting hole provided in a metal case (not shown). That is, when it is fitted into the mounting hole of the metal case from the side opposite to the flange 1a of the housing 1, the stoppers 1b, 1b provided on both side surfaces of the housing 1 are pushed toward the housing 1 by being pushed by the edges of the mounting hole. Turn. After that, when the flange 1a of the housing 1 comes into contact with the metal case, the stopper 1
b, 1b are returned to their original positions, and the tips of the stoppers 1b, 1b press the metal case from the inside,
Is fixed. Then, the flat surface portion 4b of the conductive plate member 4 fixed to the ground terminal 3 is fixed to the metal case using the screw 6, and the metal case and the flat surface portion 4b of the plate member 4 are in surface contact with each other.

As described above, when the flat portion 4a at one end of the conductive plate member 4 is brought into surface contact with the ground terminal 3 and the flat portion 4b at the other end is brought into surface contact with the metal case, the ground terminal 3 and the metal terminal 3 are made. The resistance between the ground terminal 3 and the metal case is smaller and the inductance is also smaller than in the case where the case is connected with a wire. Since the shield material that covers the power supply cable (not shown) inserted into the connection terminals 2 and 2 is connected to the metal case through the ground terminal 3 and the plate material 4, the metal case is grounded. Make sure that the shield material of the power cable is grounded. Therefore, even if noise is induced in a power supply line (not shown) in the metal case connected to the connection terminals 2 and 2 by noise radiation from a circuit board (not shown) or the like, the ground terminal 3 and the metal case are not connected to each other. Low resistance between
In addition, because of its low inductance, the ground potential of the shield material covering the power cable is kept stable, and the radiation of noise transmitted from the power line to the cable via the connection terminal is suppressed to a low level.

In this way, the radiation level of noise from the power cable connected to the outlet 10 can be greatly reduced. Further, the work of connecting the ground terminal 3 to the metal case can be simplified, and the work of winding the power supply line around the expensive ferrite core can be eliminated without using the expensive ferrite core. It is possible to realize a low-cost outlet for electronic devices.

(Second Embodiment) FIG. 2 is a perspective view of an outlet 20 of an electronic apparatus according to a second embodiment of the present invention. The outlet 20 has the same configuration as that of FIG. 1 except for the ground terminal 23, and the same components are designated by the same reference numerals. The portion of the ground terminal 23 opposite to the insertion side has a plate shape, and a substantially square flat portion 23a is provided at the tip thereof.
Is formed. Then, a hole 24 is provided in the substantially central portion of the plane portion 23a.

Similar to the first embodiment, the outlet 20 is fitted and fixed in a mounting hole provided in a metal case (not shown), and then the flat surface portion 23a of the ground terminal 23.
Surface contact with a metal case, and
4 into which the screw 25 is inserted, and the flat portion 2 of the ground terminal 23
3a is fixed to a metal case. Therefore, the resistance between the ground terminal 23 and the metal case is smaller and the inductance is also smaller than when the ground terminal 23 and the metal case are connected by a wire. And
The shield material that covers the power cable (not shown) inserted into the connection terminals 2 and 2 is connected to the metal case through the ground terminal 23. Therefore, by grounding the metal case, the ground terminal 23 can be securely connected. Grounded. Therefore, even if noise is induced in a power supply line (not shown) in the metal case connected to the connection terminals 2 and 2 by noise radiated from a circuit board or the like, the shield material of the power cable and the metal case Low resistance between
Moreover, since it has a low inductance, the ground potential of the shield material covering the power cable is kept stable, and the radiation of noise transmitted from the power line to the power cable via the connection terminal is suppressed to a low level.

In this way, the radiation level of noise from the power cable connected to the outlet 20 can be reduced. Further, instead of the work of connecting the ground terminal 23 and the metal case with a wire, the ground terminal 2
3 can be directly connected to the metal case. Also,
It is possible to eliminate the work of winding the power supply line around the ferrite core without using an expensive ferrite core.

(Third Embodiment) FIG. 3 shows a perspective view of an outlet 30 of an electronic apparatus according to a third embodiment of the present invention.
31 is a housing made of a resin having a substantially U-shaped cross section, 3
Reference numeral 2 is fixed to parallel portions of the housing 31, respectively, and two connection terminals are insulated from each other. Reference numeral 33 is fixed to a central portion of the housing 31 having a substantially U-shaped cross section. It is an insulated ground terminal. A substantially rectangular flange 31 made of a conductive resin is formed on the outer periphery of one end of the housing 31 on the plug insertion side.
a is formed. The flange 31a and the ground terminal 33 are electrically connected.

The housing 31 is fitted into a mounting hole provided in a metal case (not shown) from the outside, and is fixed so that a flange 31a formed on the outer periphery of one end of the housing 31 on the plug insertion side contacts the metal case. .
Since the flange 31a is made of conductive resin and the flange 31a and the ground terminal 33 are electrically connected, the ground terminal 33 and the metal case are electrically connected via the flange 31a made of conductive resin. Connected to. Since the surface 34 of the flange 31a is in surface contact with the metal case, the ground terminal 33 and the metal case have low resistance and low inductance. The shield material that covers, for example, the power cable connected to the plug insertion side of the outlet is the ground terminal 33.
Is connected to the metal case via the, and the metal case is grounded to reliably ground the shield material of the power cable. Therefore, even if noise is induced in the power supply line (not shown) in the metal case connected to the connection terminals 32, 32 by noise radiated from the circuit board or the like, the ground potential of the shield material covering the power supply cable is stable. It is kept and suppresses the radiation of noise transmitted to the power cable.

As described above, the radiation level of noise from the power cable connected to the outlet 30 can be reduced. Further, the work of connecting the ground terminal 33 and the metal case can be simplified.

(Fourth Embodiment) FIG. 4 is a side view of an outlet 40 of an electronic apparatus according to a fourth embodiment of the present invention. This outlet 40 has the same configuration as that of FIG. 1 except for the method of connecting the ground terminal 3 and the metal case 45, and the same components are designated by the same reference numerals.

The flat surface portion 44a of the metallic connecting member 44 is in contact with the surface of the housing 1 opposite to the plug insertion side of the flange 1a, and the flat surface portion 44a extends from the lower side of the flat surface portion 44a along the bottom surface of the housing 1. A connecting portion 44b is provided which extends and whose tip is bent to make surface contact with the ground terminal 3. The flat portion 44a of the connecting member 44 is sandwiched between the flange 1a of the housing 1 and the metal case 45, and comes into surface contact with the metal case 45.

The housing 1 is fitted into the mounting hole 46 provided in the metal case 45 from the outside. At this time, the flat surface portion 44a of the connecting member 44 that contacts the surface of the flange 1 opposite to the plug insertion side is sandwiched between the flange 1a and the metal case 45 and the metal case 45.
Make surface contact with. On the other hand, the connecting portion 44b of the connecting member 44
Has a surface contact with the ground terminal 3, and thus electrically connects the ground terminal 3 and the metal case 45 via the connection member 44. The flat portion 44a of the connecting member 44 and the metal case 45 are in surface contact with each other, and the connecting portion 44 of the connecting member 44 is formed.
Since b and the ground terminal 3 are in surface contact with each other, the resistance between the ground terminal 3 and the metal case 45 is low and the inductance is low. The shield material that covers the power cable connected to the plug insertion side of the outlet is connected to the metal case 45 via the ground terminal 3 and the connection member 44, and the metal case 45 is grounded. Make sure that the shield material of the power cable is grounded. Therefore, even if noise is induced in the power supply line (not shown) in the metal case 45 connected to the connection terminals 2 by radiation noise from the circuit board or the like, the ground potential of the shield material covering the power supply cable is stabilized. The noise radiation transmitted from the power line to the power cable via the connection terminals 2 and 2 is kept low.

As described above, the radiation level of noise from the power cable connected to the outlet 40 can be reduced. Further, the outlet 40 is fitted and fixed in the mounting hole of the metal case 45, and the connection member 44 makes surface contact with the metal case 45, whereby the ground terminal 3 is electrically connected to the metal case 45 via the connection member 44. The connection work between the ground terminal 3 and the metal case 45 can be simplified.

(Fifth Embodiment) FIG. 5 is a view of a ground terminal 53 of an outlet of an electronic device according to a fifth embodiment of the present invention as viewed from the insertion side. On the insertion side of the ground terminal 53, three blade receivers 51 are provided in the inner periphery of a hole 54 having a bell-shaped cross section at intervals of approximately 90 degrees in the circumferential direction. Above ground terminal 5
When the ground pin 93 of the plug 91 is inserted into the inner periphery of the hole 54 of FIG.
The outer circumferences of the ground pins 93 of the plug 91 shown in (a) are in contact with each other. Therefore, the ground terminal 53 and the ground pin 93 of the plug 91 are brought into contact with each other at multiple points, whereby the ground terminal 53 and the ground pin 93 of the plug 91.
The contact resistance between and becomes small.

Therefore, when the ground terminal 53 is surely grounded, for example, through a metal case, the resistance between the shield material of the connected power cable and the metal case is small, and therefore the shield material of the power cable. The ground potential of can be stabilized. Therefore, the radiation of noise from the power cable can be suppressed low.

(Sixth Embodiment) FIG. 6 is a view of a ground terminal 63 of an outlet of an electronic device according to a sixth embodiment of the present invention as viewed from the plug insertion side. A substantially cylindrical blade receiver 61 having a plurality of protrusions on its inner circumference is provided on the insertion side of the ground terminal 63. In the above, the plug 9 shown in FIG.
When the ground pin 93 of No. 1 is inserted, the ground terminal 63
The plurality of protrusions on the inner circumference of the ground contact the outer circumference of the ground pin 93 at multiple points, and the contact resistance between the ground terminal 63 and the ground pin 93 of the plug 91 is reduced.

Therefore, when the ground terminal 63 is surely grounded via, for example, a metal case, the ground potential of the shield material connected to the ground pin of the plug of the connected power cable is stabilized. Therefore, the radiation of noise from the power cable can be suppressed low.

In the first, second and third embodiments, the housing 1
Stoppers 1b, 1b and flange 1a provided on both sides of the
Although the outlet is fixed by sandwiching the periphery of the mounting hole of the metal case between and, the method of fixing the outlet to the metal case is not limited to this.

In the third embodiment, all the flanges 31a of the housing 31 are made of conductive resin. However, the flanges are not limited to the conductive resin and may have any conductivity. Further, only the portion of the flange that comes into contact with the metal case may be formed of a conductive resin or the like.

Further, although the metal connecting member 44 is used in the fourth embodiment, the connecting member is not limited to metal, and any member having conductivity may be used.

In the fifth embodiment, the ground terminal 53 is provided with three blade receivers 51. However, the number of blade receivers is not limited to this, and three or more blade receivers may be used.

[0051]

As is apparent from the above, the outlet of the electronic device according to the invention of claim 1 is fixed in the housing, at least two connecting terminals fixed in the housing, and insulated from each other. And a ground plate insulated from the connection terminal, having a flat surface portion that makes surface contact with the ground terminal at one end, and a conductive plate material having a flat surface portion that can make surface contact with another member at the other end. Be prepared.

Therefore, according to the outlet of the electronic device of the present invention, the resistance between the ground terminal and the metal case is smaller than that when the ground terminal and the metal case are connected by a wire. It becomes smaller and the inductance becomes smaller. Then, the shield material that covers the power cable connected to the plug insertion side of the connection terminal is connected to the metal case via the ground terminal and the plate material, and the metal case is grounded to thereby shield the power cable. Be sure to ground. Therefore, even if noise is induced in the power line in the metal case connected to the connection terminal by noise radiated from the circuit board or the like, the ground terminal and the metal case have low resistance and low inductance. Therefore, the ground potential of the shield material covering the power cable is kept stable, and the radiation level of noise from the power cable can be reduced. Also,
Instead of connecting the ground terminal and the metal case with a wire material, they can be easily connected with a plate material. Further, it is possible to eliminate the work of winding the power supply line around the ferrite core without using an expensive ferrite core. Therefore, noise radiated from the connected power cable can be significantly reduced, and a low-cost outlet for electronic equipment can be realized.

According to a second aspect of the present invention, there is provided an electronic device outlet, which is fixed in the housing and the housing.
At least two connection terminals insulated from each other and a ground terminal fixed in the housing and insulated from the connection terminal are provided, and the ground terminal has a flat surface portion capable of making surface contact with another member. .

Therefore, according to the outlet of the electronic device of the present invention, the resistance between the ground terminal and the metal case is smaller than that when the ground terminal and the metal case are connected by a wire. It becomes smaller and the inductance becomes smaller. The shield material that covers the power cable connected to the plug insertion side of the connection terminal is connected to the metal case through the ground terminal, and the metal case is grounded to ensure the shield material of the power cable. Ground to. Therefore, even if noise is induced by noise radiated from the circuit board or the like in the power line in the metal case connected to the connection terminal, the resistance between the shield material of the power cable and the metal case is low, In addition, since it has a low inductance, the ground potential of the shield material covering the power cable is kept stable. Therefore, since the ground potential of the shield material of the power cable is kept stable, the radiation level of noise from the power cable can be reduced. Further, instead of connecting the ground terminal and the metal case with a wire, the ground terminal can be directly connected to the metal case. Further, it is possible to eliminate the work of winding the power supply line around the ferrite core without using an expensive ferrite core. Therefore, noise radiated from the connected power cable can be significantly reduced, and a low-cost outlet for electronic equipment can be realized.

According to a third aspect of the present invention, there is provided an electronic device outlet, which is fixed in the housing and the housing.
At least two connecting terminals insulated from each other, and fixed in the housing, and provided with a ground terminal insulated from the connecting terminal, is fitted and fixed from the outside in a mounting hole provided in a metal case, the housing A flange is formed on the outer periphery of one end on the plug insertion side, and at least a portion of the flange that comes into contact with the metal case has conductivity and is electrically connected to the ground terminal.

Therefore, according to the outlet of the electronic device of the third aspect of the present invention, since the side surface of the flange and the metal case are in surface contact with each other, the ground terminal and the metal case have a low resistance and a low resistance. It becomes an inductance. Then, the shield material that covers the power cable connected to the plug insertion side of the connection terminal is connected to the metal case via the ground terminal and the flange of the housing,
Make sure that the shield material of the power cable is grounded by grounding the metal case. Therefore, even if noise is induced in the power supply line in the metal case connected to the connection terminal by radiation noise from the circuit board etc., the ground potential of the shield material covering the power supply cable is kept stable, and the power supply line is kept stable. The radiation level of noise from the power cable can be significantly reduced through the connection terminal. Also,
By fitting this outlet into the mounting hole of the metal case and fixing it, the ground terminal and the metal case are electrically connected, so that the work of connecting the ground terminal and the metal case can be simplified.

According to a fourth aspect of the present invention, there is provided an electronic device outlet, which is fixed in the housing and the housing.
At least two connecting terminals insulated from each other, and fixed in the housing, and provided with a ground terminal insulated from the connecting terminal, is fitted and fixed from the outside in a mounting hole provided in a metal case, the housing A flange is formed on the outer periphery of one end on the plug insertion side, the flat surface portion abuts on the surface of the flange opposite to the plug insertion side, and the ground terminal and the connection portion are in surface contact.

Therefore, according to the electrical equipment outlet of the present invention, the flat surface portion of the conductive connecting member and the metal case are in surface contact with each other, and the connecting portion of the conductive connecting member and the ground terminal are connected. Are in surface contact with each other, so that the resistance and inductance between the ground terminal and the metal case are low. And, for example, the shield material that covers the power cable connected to the plug insertion side of the connection terminal is connected to the metal case via the ground terminal and the connection member, and by grounding the metal case, the power cable Make sure that the shield material is grounded. Therefore, even if noise is induced in the power line in the metal case connected to the connection terminal by radiation noise from the circuit board etc., the ground potential of the shield material covering the power cable is kept stable and The radiation level of noise from the power cable can be significantly reduced through the connection terminal. Also, fit this outlet into the mounting hole of the metal case and fix it,
When the connecting member makes surface contact with the metal case, the ground terminal is electrically connected to the metal case via the connecting member, so that the work of connecting the ground terminal and the metal case can be simplified.

According to a fifth aspect of the present invention, there is provided an outlet for an electronic device, wherein a ground terminal connected to the ground pin on the plug side is provided with at least three blade supports that come into contact with the ground pin.

Therefore, according to the outlet of the electronic apparatus of the fifth aspect of the invention, the resistance between the ground terminal and the ground pin of the plug is reduced due to the multipoint contact between the ground terminal and the ground pin on the plug side. When the ground terminal is surely grounded, for example, via a metal case, the shield material covering the connected power cable is connected to the metal case via the ground terminal, and the ground potential of the shield material is changed. Since it is stable, noise radiation from the power cable can be kept low.

According to a sixth aspect of the present invention, there is provided an outlet for an electronic device, wherein a ground terminal connected to the ground pin on the plug side is provided with a substantially cylindrical blade receiver having a plurality of protrusions in contact with the ground pin on its inner circumference. It is a thing.

Therefore, according to the outlet of the electronic device of the present invention, the multiple protrusions on the inner circumference of the ground terminal and the outer periphery of the ground pin make contact between the ground terminal and the ground pin on the plug side. Has a smaller resistance. When the ground terminal is surely grounded, for example, via a metal case, the shield material covering the connected power cable is connected to the metal case via the ground terminal, and the ground potential of the shield material is changed. Since it is stable, noise radiation from the power cable can be kept low.

[Brief description of drawings]

FIG. 1 is a perspective view of an outlet of an electronic device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an outlet of an electronic device according to a second embodiment of the present invention.

FIG. 3 is a perspective view of an outlet of an electronic device according to a third embodiment of the present invention.

FIG. 4 is a side view of an outlet of an electronic device according to a fourth embodiment of the present invention.

FIG. 5 is a view of an electronic device according to a fifth embodiment of the present invention when viewed from the plug insertion side of an outlet.

FIG. 6 is a view of an electronic device according to a sixth embodiment of the present invention when viewed from the plug insertion side of an outlet.

FIG. 7 is a perspective view of an outlet of a conventional electronic device.

FIG. 8 is a perspective view of an outlet of an electronic device in which a power supply line is wound around a conventional ferrite core.

9 (a) is a power cable, FIG. 9 (b) is a front view of a conventional outlet viewed from the plug insertion side, and FIG. 9 (c) is a ground terminal of FIG. 9 (b). It is an enlarged view of the blade receiving part of.

[Explanation of symbols]

1 ... Housing, 1a ... Flange, 1b ... Stopper,
2 ... Connection terminal, 3 ... Ground terminal, 4 ... Plate material, 5, 6 ...
screw.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Maezono, Otani 1000, Okamoto-cho, Kusatsu-shi, Shiga 2 Daikin Industries, Ltd. Shiga Works (72) Inventor Hitoshi Kamino 2-6 Nishi Nishishinjuku, Shinjuku-ku, Tokyo 1 Shinjuku Sumitomo Building Daikin Industries, Ltd. Tokyo Branch

Claims (6)

[Claims] 1. A housing (1), at least two connection terminals (2, 2) fixed in the housing (1) and insulated from each other, and a connection terminal fixed in the housing (1). An outlet for an electronic device comprising (2, 2) and an insulated ground terminal (3) has a flat surface portion (4a) which is in surface contact with the ground terminal (3) at one end and the other end at the other end. An outlet for an electronic device, comprising an electrically conductive plate (4) having a flat surface (4b) capable of making surface contact with a member. 2. A housing (1), at least two connection terminals (2, 2) fixed in the housing (1) and insulated from each other, and the connection terminal fixed in the housing (1). An outlet for an electronic device comprising (2, 2) and an insulated ground terminal (23), characterized in that the ground terminal (23) has a flat portion (23a) capable of making surface contact with another member. The outlet of the electronic device to be used. 3. A housing (31), at least two connecting terminals (32, 32) fixed in the housing (31) and insulated from each other, and the housing (3).
1) An outlet for an electronic device, which is fixed in the interior, includes the connection terminal (32, 32) and an insulated ground terminal (33), and is externally fitted and fixed in a mounting hole provided in a metal case, A flange (31a) is formed on the outer periphery of one end of the housing (31) on the plug insertion side, and the flange (31a) is formed.
At least the portion of a) that comes into contact with the metal case is
An outlet for an electronic device, which is electrically conductive and is electrically connected to the ground terminal (33). 4. A housing (1), at least two connection terminals (2, 2) fixed in the housing (1) and insulated from each other, and the connection terminal fixed in the housing (1). An outlet for an electronic device, comprising: (2, 2) and an insulated ground terminal (3), which is fitted and fixed from the outside into a mounting hole (46) provided in a metal case (45). ), A flange (1a) formed on the outer periphery of one end on the plug insertion side, and the flange (1a)
Of the flat surface (44
a) and a connecting portion (4) that makes surface contact with the ground terminal (3).
4b) having a conductive connecting member (44). 5. The ground pin (9) on the side of the plug (91)
3) The ground terminal (53) connected to the ground pin (93) is in contact with at least three blade receivers (51).
An outlet for electronic equipment, characterized by being provided with. 6. The ground pin (9) on the plug (91) side
3) A ground terminal (63) connected to the ground terminal (63) is provided with a substantially cylindrical blade receiver (61) having a plurality of protrusions in contact with the ground pin (93) on the inner periphery thereof, which is an outlet for electronic equipment. .