JPH0528695Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a power supply that is inserted and fitted into an equipment inlet (power supply socket) attached to an electrical equipment, and supplies power to the electrical equipment through the inlet. The present invention relates to connectors, and particularly relates to a power supply connector in which the connector terminal holding portion is composed of a double connector insulator of an inner base and an outer base, and which improves assembly workability.

[Background technology]

A power connector for supplying power to electrical equipment includes, for example, a cord 10 having a power plug (not shown) at one end, as shown in FIG. 5a, and
A connector tip 12 having a plurality of pin terminal insertion holes 11, a cord 10 and a connector tip 12
The connector main body 13 is provided between the connector body 13 and is inserted into and fitted into an equipment inlet (power socket) attached to an electrical equipment to supply power to the electrical equipment. The configuration of the device inlet and the conventional power connector will be explained below.

(1) Equipment inlet The equipment inlet 500 shown in Fig. 4 is composed of a plurality of pin terminals 501 arranged at a predetermined interval (in Fig. 4, the central terminal is the earth terminal and the pair of terminals below the earth terminal are live terminals), a roughly box-shaped inlet body 502 injection-molded from thermoplastic hard insulating resin such as PBT resin, a power connector fitting recess 503 in the terminal arrangement part of the inlet body 502, a roughly fan-shaped fixing piece 505 having a screw through hole 504 for fixing the inlet 500 to the electrical equipment housing by screw fastening, and a pin terminal solid wall (not shown) for fixing and holding the pin terminal 501 at a predetermined position at the rear of the pin terminal 501. The front of the pin terminal 501 is connected to the inlet body 50
2 and has a connection part at the rear which is connected to the power supply part of the electrical equipment by an insulated electric wire.

(2) Connector The power connector shown in Figures 5a and b is a cord 10 with a power plug (not shown) at one end.
and a hexagonal, substantially trapezoidal connector tip 12 inserted into the fitting recess 503 of the inlet 500.
, a plurality of pin terminal insertion holes 11 provided on the front end surface of the connector tip 12 , and a connector main body 13 provided between the cord 10 and the connector tip 12 . In addition, the connector tip 12
and a method of using the same plastic as the material of the connector body 13, for example, a method of integrally molding it with vinyl chloride resin (applicable to those with a rated voltage of 125V in Japan, the United States, etc.), and a method of using the same plastic as the material of the connector body 13. The thermoplastic hard plastic,
For example, there is a method of using a connector insulator integrally molded in advance with PBT resin or the like, and using hard plastic, such as PVC resin, for the connector body 13.

Here, the internal structure of a connector in which a connector insulator is applied to the connector tip 12 described above will be described with reference to the AA cross-sectional view of FIG. 5a shown in FIG. 5b. Connector tip 12 is connector insulator 1
4 and a locking body 17, the connector insulator 14
is provided with an insertion hole 11 through which the pin terminal 501 of the inlet 500 is inserted, a connector terminal arrangement section 16, and a cord end arrangement section 15. Further, a connector terminal 20 having a connecting portion 19 connected to the conductor 18 of the cord 10 is inserted into the connector terminal arranging portion 16, and a connecting portion 19 between the connector terminal 20 and the cord 10 is inserted into the cord end arranging portion 15.
A locking body 17 that is locked to the connector insulator 14 holds and fixes the connector terminal 20 within the connector insulator 14 at the upper part of the cord end placement portion 15 . In addition, the locking body 17 and the connector insulator 14
The locking is done by connecting the connector terminal 2 to which the cord 10 is connected.
0 into the connector insulator 14, the locking body 1
7 is inserted behind the connector insulator 14 from the cord 10 side, and the locking protrusion of the connector insulator 14 and the locking recess of the locking body 17 are engaged. Further, the locking body 17 is provided with a groove for arranging the cord 10. Incidentally, reference numeral 13 denotes a connector main body portion which is integrally molded from PVC resin or the like together with a cord protection portion from the rear end of the connector insulator 14 to the cord end.

Here, the reason why the insulator 14 is used for the connector tip 12 is because the part that holds the connector terminal 20 is made of the same material as the connector main body 13 (for example,
PVC resin, etc.), the inlet 500
When the connector is inserted and mated, the pin terminal 501
and variations in the dimensions of the connector terminals 20, and
Due to variations in the arrangement and fixed dimensions of both terminals,
This is because the arrangement position and shape of the connector terminals 20 may change, resulting in poor contact, which may cause the connector to generate heat, which is unfavorable from a safety standpoint. To avoid this safety issue,
A connector insulator 14 made of hard thermoplastic with excellent heat resistance is used.

On the other hand, these power connectors must meet the required characteristics stipulated by the safety standards of each country before they are approved and can be manufactured and sold. Electrical Appliance and Material Control Law in Japan, UL in the United States, etc.
Standards etc. are typical examples of such standards. The basis of the standard is the IEC standard, and the power connector mentioned above is IEC standard No. 320 (1981 edition). Countries where the common rated voltage is 250V (mainly Europe)
The company has approved manufacturing based on the above-mentioned IEC standards. Safety test items that require particular attention under the IEC standards include the overload test and insertion/removal test described below.

A Contents of overload test When the voltage is 275V and the rated current is 10A or more,
While applying voltage and current of 1.25 times and power factor of 0.95 or more to the inlet and connector, insert and remove the connector 50 times at a rate of 15 times per minute, and confirm that there are no sparks between each terminal during the test.

B Contents of mating/unmating test Apply rated voltage and current to the inlet and connector and perform mating/unmating 1000 times at a rate of 15 times/minute, then apply 1.5 KV AC to each terminal and connector surface.
Apply the voltage for several minutes and check that there are no abnormalities in appearance, damage to the connector terminals, or melting of the resin that makes up the connector body.

When the conventional power connector made by the above-mentioned method was tested using the above test items, it was found that the power connector whose connector tip and connector body were integrally molded from the same plastic (e.g., PVC resin) had the following results: I am not satisfied with both tests. Additionally, connectors whose tip end is made of a connector insulator integrally molded from hard thermoplastic and whose main body is made of PVC resin will pass an overload test, but will not pass an insertion/unmating test. Can not.

The reason why conventional power connectors cannot satisfy the above-mentioned test is that the tip of the connector terminal is in contact with the wall of the insulator, and the rear end is locked by a locking body. Movement in two directions is restricted, and the connector terminals are unable to follow the aforementioned variations in the pin terminal dimensions of the inlet and the variations in the pin terminal arrangement dimensions.
This is because the connector terminals are significantly deformed, and because the connector terminals cannot follow the layout dimensions of the pin terminals, the connector terminals are rubbed by the pin terminals when inserting and mating the connector, and this friction causes damage to the connector terminals. This is because metal powder is generated and adheres to the tip of the connector, causing sparks.

As a method to improve the above-mentioned problem, the following (a)
Possible methods are ~(c).

(a) Even if there are variations in the dimensions of the inlet pin terminals, the connector terminal should have a mechanism that applies strong elastic force to the contact portion of the connector terminal so that the pin terminal holding force of the connector terminal does not decrease.

(b) To enable the connector terminals to follow variations in the arrangement dimensions of the inlet pin terminals,
The connector terminal is held at the tip of the connector.

(c) Make sure that metal powder generated when the pin terminal of the inlet is inserted and fitted does not adhere to the pin terminal insertion hole at the tip of the connector and the outer periphery of the tip, or prevents arcing even if it does adhere.

The connector tip corresponding to (b) above is
One such connector is shown in Japanese Utility Model Publication No. 55-92285, which has a configuration in which a notch is provided in the peripheral wall of the connector housing to open a terminal accommodating chamber between the partition walls, and a terminal fixing member having a wire pressing portion is inserted between the partition walls and positioned so as to engage with the rear of the wire connecting portion of the previously inserted terminal fitting. In this connector, the front end of the terminal abuts against the housing and the rear end abuts against the fixing member, so that the terminal cannot move within the housing, and furthermore, the above-mentioned measure (c) is not taken into account. A connector having the same purpose is shown in Japanese Utility Model Publication No. 55-92285.
Also shown in Publication No. 63-36619. In this connector, a flat plate is provided between the contact portion of the connector terminal and the cord connection portion to insert and hold the connector terminal in the connector base, the flat plate is abutted against the peripheral wall of the base, the peripheral wall and the flat plate are held by a groove in a locking member, the rear end of the connector terminal is held by the locking member and the front end by the peripheral wall of the base, and the connector is configured to be movable to follow variations in the arrangement dimensions of the pin terminals of the inlet, with consideration given to preventing damage to the connector terminal.
However, since no measures are taken to prevent metal powder generated by wear of the connector terminals from adhering to the base, the connector cannot pass the insertion/removal test mentioned above.

Therefore, it is desired to develop a power connector that can be inserted into an inlet having a general rated voltage of 250V, that is, a power connector that satisfies the following conditions in order to satisfy the above-mentioned test.

To arrange and hold a plurality of connector terminals movably following inlet pin terminals.

Metal powder generated when inserting and removing an inlet pin terminal into a connector terminal should not adhere to the pin terminal insertion hole, the connector tip, and its outer periphery, or even if it does, it should be possible to prevent arcing.

To easily hold each terminal by arranging a pair of connector terminals and one grounding terminal at predetermined positions within a connector insulator.

Each terminal is placed inside a connector insulator, and the outer periphery of the connecting portion between each terminal and the cord is covered with the connector insulator so that the plastic constituting the connector body does not fill up and prevent the movement of the connector terminal.

[The problem that the idea attempts to solve]

However, according to conventional power connectors, the connector terminal holding part is integrally molded from thermoplastic hard plastic (or soft plastic) due to the requirements for strength and insulation of the connector terminal holding part. When trying to implement a configuration in which the connector terminals are movably arranged and held following the pin terminals of the inlet, or a configuration that prevents the generation of arcs due to adhesion of metal powder, the internal shape of the connector terminal holding part becomes complicated. Therefore, there was a problem in that integral molding made processing difficult. In addition, if the connector terminal holding part is divided vertically (or horizontally) to make it easier to process the connector terminal holding part, the strength and insulation properties will be reduced, or the assembly workability will be reduced. There were some inconveniences such as

Therefore, an object of the present invention is to easily process and form a connector terminal holding part with a complicated internal shape.
It is an object of the present invention to provide a power supply connector that improves the strength and insulation properties of a connector terminal holding part and facilitates assembly work.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has a connector terminal holder that holds a connector terminal, and a cord holder that holds a cord connected to the connector terminal, and is inserted into an equipment inlet attached to an electrical equipment. In a power connector that is fitted and supplies power to an electrical device through the inlet, the connector terminal holding section includes an inner base that arranges and holds the connector terminal in a predetermined position, and a storage section that accommodates the inner base. an outer base having a cord protection part at a rear end for protecting a cord connection part that connects the connector terminal and the cord; A connector body is formed by integrally molding the connector terminal, and the connector terminal includes a fixing part (crimping, soldering, etc.) for fixing the cord conductor, a terminal connecting part into which the terminal of the device inlet is inserted and connected, and the fixing part and the The inner base includes two live current terminals and one ground terminal, each having a flat plate portion located between the connection parts, and the inner base includes the two live current terminals and the one ground terminal. A terminal placement hole is located at the apex of an isosceles triangle and has a gap between the terminal connection portion and the terminal connection portion for accommodating the terminal connection portion, and the terminal placement hole has a gap between the terminal connection portion and the terminal connection portion, and the terminal placement hole a groove for depositing abrasion metal powder generated by insertion and removal of the terminal of the device inlet and the terminal connection portion through a locking protrusion that engages with the tip of the terminal connection portion of the connector terminal at a position in front of the connector terminal; and a slit-shaped notch into which a locking member is inserted from the outside at the position of the terminal placement hole where the flat plate portion is located, and the locking member is located at the apex of the isosceles triangle. The cord protection portion of the outer base has a crotch-like shape that presses down the flat plate portions of the two live power terminals and the one earthing terminal, and the cord protection portion of the outer base has a crotch-like shape that presses down the flat plate portions of the two live power terminals and the one earth terminal, and the cord protection portion of the outer base has a A pair of locking walls for protecting the base are connected and molded through a thin wall portion, and a contact surface is formed by pressing the pair of locking walls and fitting and locking each other. The power supply connector is characterized in that the inner base is locked by coming into contact with a rear end portion of the inner base housed in the housing portion.

That is, in the power connector of the present invention, the inner base is inserted into the outer base to form the connector terminal holder, thereby making it easier to process and form the connector terminal holder. Furthermore, the strength and insulation properties of the connector terminal holding portion are improved by arranging and holding the connector terminal in a predetermined position on the inner base and then inserting it into the outer base. Further, the inner base may be locked by abutting a contact surface formed by the pair of locking walls being pressed and fitting and locking each other against the rear end surface of the inner base stored in the storage portion. This allows assembly work to be performed easily and reliably.

〔Example〕

Hereinafter, embodiments of the power connector according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a power connector according to an embodiment of the present invention, and includes a cord 10 having a power plug (not shown) at one end, and a connector tip portion having a plurality of pin terminal insertion holes 11. It is composed of a (connector terminal holding section) 12 and a connector main body section 13 provided between the cord 10 and the connector tip end section 12. Hereinafter, with reference to FIGS. 2 and 3, the detailed configuration of each part will be explained in the order of the connector terminal, the inner base, the locking body, and the outer base.

As shown in FIG. 2a, the connector terminal 100 is formed by punching and pressing a single metal plate, and has a contact portion 101 consisting of a pair of upright pieces bent on both sides, and a bottom portion where the upright pieces are bent. A punched hole 102 is provided, and the bottom part is further extended to form a flat plate part 13.
It has a pair of cord connecting crimp pieces 104 connected to the flat plate part 103, and the punched hole 10
Reference numeral 2 provides a pair of upright pieces with elastic force so that the U-shaped contact portion 101 does not deform when the pin terminal of the inlet is inserted or removed. still,
The connector terminal 100 is made of phosphor bronze, brass, or the like.

Next, the configuration of the inner base 200 will be shown with reference to FIGS. 2a and 2b. The inner base 200 is integrally formed into a hexagonal trapezoidal box shape of polyamide resin, PBT resin, etc., and has a pair of live terminal placement holes 201 on the bottom side of the trapezoid, and the live current terminal placement holes. 201, a ground terminal arrangement hole 202 arranged at a predetermined interval above the middle of the ground terminal arrangement hole 201, a substantially U-shaped notch 203 reaching the bottom of each terminal arrangement hole formed at the rear thereof, and a notch 203. A locking body 30, which will be described later, is installed inside the two walls 204 and 205 that constitute the structure.
A guide groove 206 is provided to which the guide protrusion No. 0 comes into contact. On the other hand, as shown in FIG.
A peripheral protrusion 208 having an inlet pin terminal insertion hole 207 is provided at the front of the terminal 1, 202, and a rectangular recess 209 larger than the pin terminal insertion hole 207 is further provided at the front of the peripheral protrusion 208. Here, the thickness of the peripheral protrusion 208 and the depth of the recess 209 were each 1.5 to 2.0 mm.

The locking body 300 is integrally formed of the same material as the inner base 200 (polyamide resin, PBT resin, etc.), and is used by being inserted and locked into the notch 203 of the inner base 200. As shown in FIG. 2a, the guide protrusion 301, which is generally U-shaped as a whole and fits into the guide groove 206, and the terminal placement hole on both walls forming the cutout 203 of the inner base 200 described above 201, 202, three engaging protrusions 302 that engage with the upper sides of the inner base 200, a contact recess 304 formed at the center of the lower part that contacts the grounding terminal placement hole 202 of the inner base 200, and a pair of leg pieces 305. It has.

The outer base 400 is the inner base 20
0 and the locking body 300, and as shown in FIG.
and a pair of locking walls 406A and 406B that lock the inner base 200. The accommodating portion 402 has a hexagonal substantially trapezoidal tip wall 403 having a pin terminal insertion hole 401 and six circumferential walls 404 extending in one direction perpendicular to the tip wall 403 .
Cover the outer periphery of the The above-described pair of locking walls 406A and 406B are provided on the upper and lower peripheral walls 404 at the rear end of the housing portion 402 with a thin wall portion 405 interposed therebetween. Locking wall 40 connected to lower peripheral wall 404
6A is a contact surface 407 that comes into contact with the rear end surface of the inner base 200, a pair of live terminals and their connection parts, and an outlet 408 that leads out the cord end.
and a protrusion 409 forming an outlet 408,
The central protrusion 409 is provided with an outlet 410 for a grounding terminal cord, and the protrusions 409 on both sides are provided with engaging arms 41 that lock and engage with the other locking wall 406B.
1 is provided. Furthermore, a groove 412 is provided on the outer periphery of the locking wall 406A in which the engaging arm 411 is formed. The other locking wall 406B has a recess 413 into which the central protrusion 409 of the locking wall 406A described above fits, and an outlet 410A provided at the center of the recess 413 that covers the outer periphery of the grounding terminal and its connecting cord end. , a protrusion 414 that fits into the outlet 408, a protrusion 417 that constitutes the protrusion 414,
It has a groove 415 provided on the outer periphery and engagement protrusions 416 provided on both ends of the groove 415 and engaged with the engagement arm 411 described above.

Based on the above configuration, a pair of live terminals and a
The bottom of the connector terminal 100 consisting of two ground terminals is inserted into each terminal placement hole 20 of the inner base 200.
1, 202 and insert it until the connector terminal 100 abuts inside the peripheral protrusion 208 at the tip of each placement hole. By this insertion, the flat plate portion 103 of each connector terminal 100 is located in the notch portion 203. After inserting the connector terminal 100, the locking body 300 is placed in the notch 203 of the inner base 200, and the leg piece 305 of the locking body 300 and the contact recess 3
04 facing down, the guide protrusion 301 of the locking body 300 is brought into contact with the guide groove 206 of the inner base 200, and the locking body 300 is pressed. By this pressing, one thin wall forming the notch 203 allows the engagement protrusion 302 to be inserted by its elastic force, and the engagement protrusion 302 is locked and fixed to the upper side of each terminal placement hole 201, 202. be done. As a result, the flat plate portions 103 of the pair of live power terminals are connected to the bottom of the live power terminal arrangement hole 201 of the inner base 200 and the locking body 300.
It is held between the bottom portions of the pair of leg pieces 305.
The connector terminal 100 is held by the flat plate portion 103 described above, so that the peripheral protrusion 208 of the inner base 200
and is arranged in a terminal arrangement part formed on the entire wall of the locking body 300. The terminal arrangement portion is configured to surround the connector terminal 100 with a predetermined margin that allows movement of the connector terminal 100,
This allows the connector terminal 100 to have a movement that allows for variations in the arrangement dimensions of the inlet pin terminals.

Next, in order to hold the inner base 200 holding the connector terminal 100 between the outer base 400, the inner base 200 with the connector terminal 100 inserted therein is moved so that the tip of the inner base 200 touches the tip wall 403 of the outer base 400. The pair of locking walls 40 are inserted into the housing part 402 until they touch each other.
6A, 406B at the thin wall portion 405, the protrusion 409 is placed in the recess 413, and the protrusion 414 is placed in the outlet 4.
08, the protrusions 409 are fitted or abutted on the protrusions 417, respectively, and the engagement arms 411 are engaged with the engagement protrusions 416 to be locked. As a result, the contact surfaces 407 of the locking walls 406A, 406B contact the rear end surface of the inner base 200, and movement of the inner base 200 within the outer base 400 is restricted. Due to the above engagement and locking, the outer periphery of the connection portion between the connector terminal 100 and the cord 10 and the cord end are covered by the outlet ports 408, 410, and 410A.

Next, referring to FIG. 3, the inner base 20
0 and the outer base 400 will be explained. FIG. 3 shows a sectional view taken along line BB in FIG. 2d, which makes the shape of the tip of the inner base 200 clear. As described above, the inner base 200 has a peripheral protrusion 208 on its tip that abuts the tip of the connector terminal 100, and the peripheral protrusion 208 allows the pin terminal insertion hole 2 of the inlet to be inserted into the inner base 200.
07 is formed. Furthermore, the peripheral protrusion 208
A rectangular recess 209 is provided at the tip. From the same figure, the notch 2 of the inner base 200
Engagement protrusion 302 of locking body 300 inserted into 03
It can be seen that these are engaged with the upper sides of the connector terminal placement holes in both walls constituting the notch 203.
In addition, the recessed portion 20 at the tip of the inner base 200
It can be seen that a gap larger than the pin terminal insertion hole 401 is formed at the tip of the inner base 200 by contacting the tip wall 403 of the outer base 400 having the inlet pin terminal insertion hole 401. It can be seen that the rear end of the inner base 200 is held within the outer base 400 by engagement between a pair of locking walls 406A and 406B. Further, the flat plate portion 103 of the connector terminal 100 is held between the bottom of the placement hole of the inner base 200 and the bottom of the leg piece 305 of the locking body 300, and the connector terminal 100 is held movably within the placement hole 202. I can understand. Furthermore, a pair of locking walls 406A, 40 of the outer base 400
Outlet ports 408, 4 formed by engagement of 6B
10 covers the connector terminal 100, the cord connecting portion, and one end of the cord 10.

As shown in FIG. 1, a connector main body having a cord protection part is integrally molded from the rear end of the connector tip part (connector terminal holding part) 12 assembled in this way to the cord end, using PVC resin or the like.
The connector body is located in the groove 41 of the outer base 400.
2,415 strengthens the connection with the base, which is connected with a step. In addition, each outlet 40
Since the insulated wire core of the cord 10 is interposed in the wires 8 and 410, the connection portion between the connector terminal 100 and the cord 10 is not filled with connector body molding resin.

The power supply connector of this embodiment can satisfy the overload test and insertion/removal test of the IEC standard (rated voltage 250V) due to the following configuration and operation.

A pair of live current terminals are arranged on the bottom side of the hexagonal, substantially trapezoidal inner base 200, and one earth terminal is arranged on the top side of the inner base 200 in a substantially triangular shape, and each terminal is held by the inner base 200.
The locking body 300 to be inserted and locked into the notch 203 of the inner base 200 is formed into a substantially U-shape, and the flat plate portion 103 of each terminal is inserted into the notch 203 of the inner base 200.
By holding the bottom of the locking body 300, the pair of legs 305 of the locking body 300, and the bottom of the recess 304, each terminal can be placed in each approximately triangular part (at a predetermined position).
Since there is only one point for holding the terminals, movement of each terminal can be allowed. Further, the connector terminal 100 has its tip connected to the peripheral protrusion 208 of the inner base 200.
The rear end is surrounded by the locking body 300 and the surrounding wall is surrounded by the peripheral wall of the terminal placement hole, and the surrounding has a margin to allow the movement of the connector terminals 100, so that each connector terminal 100 is placed in the inlet. It can be made movable within the arrangement hole to follow variations in the arrangement dimensions of the pin terminals.

Inner base 200 and outer base 40
An inner base 20 is provided at the peripheral edge of the pin terminal insertion hole 207 of the connector tip 12 consisting of
Since a recess larger than the pin terminal insertion holes 207 and 401 is provided by the recess 209 connected to the peripheral protrusion 208 of the outer base 400 and the end wall 403 of the outer base 400, the distance from the end of the connector terminal 100 to the connector end 12 is The surface distance and area become large, and abraded metal powder generated when the pin terminals of the connector terminal 100 and the inlet are inserted and removed falls and accumulates in the recessed portion 209 due to the insertion and removal, and becomes difficult to adhere to the pin terminal insertion opening.
In addition, even if the metal powder adheres, the adhesion density of the metal powder decreases due to the large surface distance and area as described above, so the metal powder causes sparks to be generated between each terminal and between each terminal and the connector tip 12. The withstand voltage is improved as well.

Connector terminal 100 on inner base 200
Since the locking body 300 is inserted and locked in the cutout portion 203, the connector terminal 100 can be easily inserted and held, and after the insertion and locking,
Connect the cord to the connector terminal 100, insert it into the outer base 400, and lock it on the outer base 400.
A pair of locking walls 406A, 4 provided at the rear end of 0
06B at the thin wall portion 405 and fitting and locking the engagement arm 411, the workability is good.

The connection portion and cord end of the connector terminal 100 are connected to the pair of locking walls 40 of the outer base 400.
Since the outer periphery is covered by the outlet ports 408 and 410 formed by the fitting and locking of the connectors 6A and 406B, the connector body molding resin is not filled into the connection portion and the cord end, and the connection portion and the cord end are not filled with the connector body molding resin. The degree of freedom of the connector terminal 100 is not restricted by the end.

Connector tip (connector terminal holding part) 12
Since the inner base 200 and the outer base 400 have a double structure, the thickness of each is thinner (the dimension in the thickness direction of the connector insulator remains the same), and the elastic force is increased, so the outer periphery of the connector tip 12 is reduced. The insulation will not crack or chip even if subjected to impact.
We were able to improve the overall strength. Also,
The integrally molded inner base 200 arranges and holds the connector terminal 100 in a predetermined position, and the outer base 400 covers the connection between the connector terminal 100 and the cord 10, thereby improving insulation. was completed. In addition, inner base 200 and outer base 4
Since the inside of the connector tip 12 is constructed by abutting the connector tip 12, the processing and
could be easily formed. Furthermore, the inner base 20 into which the connector terminal 100 is inserted
0 into the outer base 400 and engaging it, the connector tip 12 could be easily assembled.

[Effect of idea]

As explained above, the power connector of the present invention consists of a connector terminal holding section consisting of a double insulating base of an inner base and an outer base, and a cord holding section holding a cord connected to the connector terminal. The outer base has a main body, and the outer base is formed by connecting and molding a storage part for storing the inner base and a pair of locking walls for holding the inner base stored in the storage part through a thin wall part,
Further, the inner base is locked by abutting a contact surface formed by the pair of locking walls being pressed and fitting and locking each other against the rear end surface of the inner base stored in the storage section. Therefore, it was possible to easily process and form the connector terminal holding portion with a complicated internal shape, improve the strength and insulation properties of the connector terminal holding portion, and facilitate the assembly work.

In this way, we were able to obtain a power connector with a quality that satisfies the IED standard (rated voltage 250V) insertion/extraction test.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a power connector according to an embodiment of the present invention. FIG. 2a is an exploded perspective view showing a state before the connector terminal, inner base, and locking body are inserted and fitted. FIG. 2b is a perspective view of the assembly shown in FIG. 2a. Second
FIG. c is a perspective view of the outer base before the inner base with the cord connected to the connector terminal is inserted. Figure 2 d is a perspective view of the completed assembly of Figure 2 c;
The figure is a perspective view showing the BB cross section of FIG. 2d. FIG. 4 is a diagram showing the equipment inlet. FIG. 5a is a diagram showing a conventional power connector. Figure 5b is A- of Figure 5a.
A sectional view. Explanation of symbols, 10... Cord, 11... Pin terminal insertion hole, 12... Connector tip, 13... Connector body, 14... Connector insulator, 15...
... Cord end arrangement section, 16 ... Connector terminal arrangement section, 17 ... Locking body, 18 ... Conductor, 19 ... Connection section, 20 ... Connector terminal, 100 ... Connector terminal, 101 ... Contact section, 102... Punching hole, 103... Flat plate part, 104... Cord connection crimp piece, 200... Inner base, 201... Live current terminal arrangement hole, 202... Earth terminal arrangement hole, 203... Notch part , 204, 205... wall,
206... Guide groove, 207... Pin terminal insertion hole, 208... Peripheral projection, 209... Recessed portion, 3
00... Locking body, 301... Guide protrusion, 302
...Engaging protrusion, 304...Abutment recess, 305...
Leg piece, 400...Outer base, 401...Pin terminal insertion hole, 402...Accommodating portion, 403...Tip wall, 404...Peripheral wall, 405...Thin wall portion, 40
6A, 406B... Locking wall, 407... Contact surface,
408...Outlet, 409...Protrusion, 410...
outlet, 411...engaging arm, 412...groove,
413... recess, 414... protrusion, 415...
Groove, 416... Engaging protrusion, 417... Protrusion, 50
0...Inlet, 501...Pin terminal, 502
...Inlet body, 503 ... Fitting recess, 50
4...Screw hole, 505...Fixing piece.

Claims (1)

[Claims for Utility Model Registration] A connector terminal holding part that holds a connector terminal and a cord holding part that holds a cord connected to the connector terminal, and is inserted and fitted into an equipment inlet attached to an electrical equipment. , in the power supply connector that supplies power to electrical equipment through the inlet, the connector terminal holding portion includes an inner base for arranging and holding the connector terminal in a predetermined position, and a storage portion for accommodating the inner base at a distal end thereof. and an outer base having a cord protection part at the rear end for protecting a cord connection part that connects the connector terminal and the cord, and integrally molded with plastic from the rear end of the outer base of the connector terminal holding part to the cord end. forming a connector body, and the connector terminal includes a fixing part for fixing the cord conductor, a terminal connecting part into which the terminal of the equipment inlet is inserted and connected, and a flat plate part located between the fixing part and the connecting part. The inner base accommodates the terminal connection portions of the two live power terminals and the one earth terminal, and the inner base accommodates the terminal connection portions of the two live power terminals and the one earth terminal. A terminal placement hole having a gap between the terminal connection portion and the terminal connection portion that allows movement of the terminal connection portion is located at the apex of an isosceles triangle, and the terminal placement hole of the connector terminal is positioned in front of the terminal placement hole. A groove is formed in which abrasion metal powder generated by insertion and removal of the terminal of the device inlet and the terminal connection portion is deposited through a locking protrusion that engages with the tip of the terminal connection portion, and the flat plate portion is located. A slit-shaped notch into which a locking member is inserted from the outside is formed at the position of the terminal arrangement hole, and the locking member connects the two live terminals and the first terminal at the apex of the isosceles triangle. The cord protection portion of the outer base has a crotch-like shape that presses down the flat plate portion of each of the ground terminals of the book, and the cord protection portion of the outer base has a pair of latches for protecting the inner base stored in the storage portion. The inner side has a structure in which the walls are connected and molded through a thin wall portion, and a contact surface formed by pressing the pair of locking walls and fitting and locking each other is stored in the storage portion. A power connector characterized in that the inner base is locked by coming into contact with a rear end of the base.