JPH047578Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a terminal pin widely used in electrical equipment and the like.

<Prior Art> This type of terminal pin is, for example, a socket pin installed in a power socket for AC power supply in a tape recorder.

FIG. 5a is a front view of a power socket using conventional terminal pins, and FIG. 5b is a sectional view taken along the line CC in FIG. 5a.

There, a connector attachment/detachment recess 11 is provided in the center of the front face of the socket body 10, and two socket pins 60a and 60b arranged in parallel are inserted and fixed into the inner wall surface of the connector attachment/detachment recess 11, respectively. In addition, the ends of the socket pins 60a and 60b protruding from the back wall surface of the connector attachment/detachment recess 11 are fixed by caulking, and the terminals 61a and 61b (61b not shown) extending from these ends are further fixed. AC not shown
The structure is such that the bare lead wire for input is soldered. Note that 40 is a switch mechanism for outputting a contact to indicate that the power connector is connected to the power socket.

<Problems to be solved by the invention> However, in the case of the above conventional example, the socket body 10 is made of, for example, glass-filled nylon, glass-filled PBT, or phenol resin to prevent heat damage during soldering. It is necessary to use inexpensive heat-resistant materials such as It has reached its limit.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a terminal pin that can reduce costs as a whole.

<Means for Solving the Problems> The terminal pin according to the present invention is inserted into an insulating holder so as to be able to rest against it, and a groove for receiving a bare lead wire is formed from the center part of the pin through the rear end. It is equipped with a pin and a pin fixing metal fitting that is attached to the rear end of the connecting pin from the direction opposite to the direction in which the connecting pin is inserted so as to prevent it from coming off.The pin fixing metal fitting holds both sides of the bare lead wire receiving groove from below. The holding fixture body and the protruding piece of the fixture body from the insulating pedestal side are formed so as to be bent approximately in the connecting pin insertion direction, and the expanding biasing portion abuts the back surface of the insulating pedestal in the middle of bending. , a bare lead wire fixing part is formed by bending the tip of the expansion biasing part inward, and has a bare lead wire holding hole through which the rear end of the connecting pin protruding from the fixture body is passed.

<Function> If the pin fixing bracket is attached to the rear end of the connecting pin that is inserted into the insulating holder (in such a way that the expanding biasing part is compressed), the connecting pin will be partially insulated in the expanding biasing part. By coming into contact with the back of the cradle,
The rear end is attached and fixed to the socket body with the bare lead wire protruding from the hole.

After the bare lead wire is placed along the bare lead wire receiving groove with the expanding biasing section further contracted, when the expanding biasing section is returned to its original state, the bare lead wire is caught by the biasing force of the expanding biasing section. The edge of the hole engages the bare lead wire, so that the bare lead wire is fixedly held on the connection pin.

<Example> Hereinafter, an example in which the terminal pin according to the present invention is applied to a power socket will be described with reference to the drawings. FIG. 1 is an external view of the power socket,
Figure 1a is a front view, Figure 1b is A-A in Figure 1a.
Figure 1c is a rear view, Figure 1d is a partially cutaway plan view, Figure 2 is an external view of the socket pin, Figure 2a is a front view, and Figure 2b is a plan view. Figure 2c is a sectional view taken along line D-D in Figure 2b, Figure 2d is a side view, Figure 3 is an external view of the pin fixing fitting, and Figure 3a is a front view. Figure 3b is a partially cutaway side view, Figure 3c is B-B of Figure 3b.
3d is a plan view, and FIG. 4 is a perspective view of the power socket. FIG. 4a shows the state before connecting the bare lead wire, and FIG. 4b shows the state before connecting the bare lead wire. The state after connecting bare lead wires is shown.

The power socket listed here is installed in a tape recorder as shown in Figure 1. For example, there is a socket in the center of the front of the socket body 10 (corresponding to an insulating pedestal) made of a non-heat resistant material such as ABS. A connector attachment/detachment recess 11 is provided, and two socket pins 20a and 20b (corresponding to connection pins) arranged in parallel are inserted into the inner wall surface of the recess 11, respectively. Moreover, the socket pins 20a, 2 pass through the back wall surface 12 of the connector attachment/detachment recess 11.
Pin fixing fittings 30a and 30b are attached to the ends of the socket pin 20, respectively.
a, 20b are fixed to the socket body 10. Also, this pin fixing fitting 30
a, 30b are attached to the socket pins 20a, 20b.
It also serves to connect and hold the bare lead wire 50 for AC input (details will be described later), and for safety reasons, it is also covered by the case 13. Note that 40 is a switch mechanism for switching power input, and when a power connector (not shown) is connected, a movable member 41 provided at the center of the bottom of the connector attachment/detachment recess 11 is pushed downward. The ON/OFF state of the switch piece 42 changes, and the contact output is outputted via a printed circuit board terminal 43 protruding from the lower surface of the socket body 10.

First, the socket pin 20 will be explained with reference to FIGS. 2 and 1.

A socket pin 2 is inserted into a pin insertion hole 111 (only 111a is shown in FIG. 1) provided on the back wall surface of the connector attachment/detachment recess 11.
0 is a pipe made of, for example, brass and has a diameter slightly larger than the core diameter of the bare lead wire 50, and is cut out in a semi-cylindrical shape from the center to the rear end, and the semi-inner peripheral surface of this part is used as the bare lead. It is provided as a line receiving groove 21. Further, when inserting the socket pin 20 into the pin insertion hole 111, the front edge side surface 22 of the bare lead wire receiving groove 21 is inserted into the abutment surface 112 (only 112a is shown in FIG. 1) provided inside the pin insertion hole 111. The insertion depth of the socket pin 20 is regulated by contacting the socket pin 20. Note that a locking hole 211 is formed in the center of the bare lead wire receiving groove 21 for hooking a lance 315 (described later) of the pin fixing fitting 30.

Next, the pin fixing fitting 30 will be explained with reference to FIG. 3.

The pin fixing fitting 30 attached to the rear end of the socket pin 20 is made by pressing an elastic conductive plate made of steel or the like, and includes a fixing fitting main body 31, a spreading biasing part 3
2. It consists of a bare lead wire fixing part 33.

The fixing fitting main body 31 is a holding part 31 formed by bending both sides of the fixing plate 311 downward in the figure.
2 and 313 (with the bare lead wire receiving groove 21 facing downward in the figure). Further, on the back surface of the fixing plate 311 and at the tips of the holding parts 312 and 313, there are provided holding claws 314 for regulating the positioning of the socket pin 20, and on the other hand, at the center of the back surface of the fixing plate 311, a lance 315 is provided. In addition,
The presser claw 314 is formed by punching, while the lance 3
15 are each formed by cutting out. The piece of the fixing plate 311 that protrudes from the left side in the figure is bent as shown in the figure, and the bent part expands to serve as the biasing part 32, and the part whose tip is bent inward serves as the bare lead wire fixing part 33. be.
Each part will be explained in detail below.

This expansion biasing portion 32 is connected to the bare lead wire fixing portion 33.
This bare lead wire fixing portion 33 is provided with a bare lead wire holding hole 331 having a holding claw 332 at the edge. This holding claw 332 serves to hold down the bare lead wire 50 that is placed along the bare lead wire receiving groove 21.

Hereinafter, the assembly process of the power socket will be explained.

First, as shown in FIG. 1, the socket pin 20 is inserted into the pin insertion hole 111 from the front direction. At this time, the insertion depth is regulated by the front edge side surface 22 of the socket pin 20 coming into contact with the abutment surface 112 inside the pin insertion hole 111. In this state, the rear end portion of the socket pin 20 protrudes from the back side of the socket body 10.

Next, when the pin fixing metal fitting 30 is inserted into the rear end of the socket pin 20 with the expansion biasing part 32 pressed and compressed, the retaining prevention hole 2 on the socket pin side is inserted.
The lance 315 on the pin fixing metal fitting side is hooked onto the pin fixing metal fitting 11, and the attachment of the pin fixing metal fitting 30 is completed. Moreover, when the attachment of the pin fixing fitting 30 is completed, as shown in FIG.
It is installed and fixed against. In addition, pin fixing metal fittings 3
0 is completed with the rear end of the socket pin 20 extending from the bare lead wire retaining hole 331.

Next, with the expansion biasing portion 32 pressed and compressed,
After passing the bare lead wire 50 for AC input along the bare lead wire receiving groove 21 through the bare lead wire retaining hole 331 and releasing the pressure from the expansion biasing portion 32, this biasing force causes the bare lead wire fixing portion 33 to moves in the spreading direction, and therefore the presser claws 332 touch the bare lead wire 5.
0, and the bare lead wire 50 is now connected and held to the socket pin 20. (See Figure 4b). Also, the bare lead wire 5 that is kept connected
0 can also be easily removed by pressing and contracting the expansion biasing portion 32 and pulling it out.

Therefore, in this embodiment, the bare lead wire 50 is connected to the socket pin 2 without soldering.
0, the socket body 10 can be made of inexpensive non-heat resistant material, and the socket pin 20 can be connected to the socket body 1 without the need for a caulking process.
Since it can be fixed to 0, this is a great advantage in reducing the cost of the power socket.

Note that the terminal pin according to the present invention is not limited to application only as a power socket, but can also be applied as a terminal terminal, for example, by wrapping another bare lead wire to be connected to the tip of the connection pin. be.

<Effects of the invention> As described above, when using the terminal pin of the present invention, the structure is such that bare lead wires can be connected and held without soldering, so the insulating pedestal can be made of inexpensive non-heat resistant material. Therefore, it is possible to reduce costs. Furthermore, in the assembly process, the caulking process and the soldering process can be simplified, so from this perspective as well, there is a great advantage in reducing costs as a whole.

[Brief explanation of the drawing]

1 to 4, an embodiment in which the terminal pin according to the present invention is applied to a power socket will be described with reference to the drawings. Fig. 1 is an external view of a power socket, in which Fig. 1a is a front view, Fig. 1b is a sectional view taken along line A-A in Fig. 1a, and Fig. 1c is a
is a rear view, FIG. 1d is a partially cutaway plan view, FIG. 2 is an external view of the socket pin, FIG. 2a is a front view, FIG. 2b is a plan view, and FIG. 2c is a second D in diagram b
2D is a side view, FIG. 3 is an external view of the pin fixing fitting, FIG. 3A is a front view, FIG. 3B is a partially cutaway side view, and FIG. 3c is a view taken along line B-B in FIG. 3b, FIG. 3d is a plan view, and FIG. 4 is a perspective view of the power socket.
FIG. 4a shows the state before the bare lead wire is connected, and FIG. 4b shows the state after the bare lead wire is connected. Fig. 5a is a front view of a power socket using conventional terminal pins, and Fig. 5b is a view taken from C-C in Fig. 5a.
FIG. 10...Socket body, 11...Connector attachment/detachment recess, 20a, 20b...Socket pin, 21...
...Bare lead wire receiving groove, 30a, 30b...Pin fixing metal fitting, 31...Fixing metal fitting body, 32...Spreading biasing part, 33...Bare lead wire fixing part, 331...
Bare lead wire holding hole, 50... Bare lead wire.

Claims (1)

[Scope of utility model registration request] The connecting pin is inserted into the insulating holder so that it can be held against it, and a groove is formed to receive the bare lead wire from the center of the penetrating part to the rear end, and the connecting pin can be prevented from coming out from the opposite direction when the connecting pin is inserted at the rear end of the connecting pin. The pin fixing fitting includes a fixing fitting body that holds both sides of the bare lead wire receiving groove from below, and an insulating holder side of the fixing fitting main body. The projecting piece is formed so as to be bent approximately in the direction of insertion of the connecting pin, and is formed by bending an expanding biasing portion that comes into contact with the back surface of the insulating pedestal in the middle of bending, and bending the tip of the expanding biasing portion inward. and a bare lead wire fixing part having a bare lead wire holding hole through which the rear end of the connecting pin protruding from the fixing metal body is passed.