JPH0741991U - Connecting terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] Electrical characteristics such as transistor socket,
(EN) Provided is a terminal for connecting a power transistor and a circuit board, which does not cause a problem in mechanical characteristics and has no workability problem such as the conventional direct soldering. A short rod-shaped body body made of a non-conductor such as synthetic resin, and a contact body made of at least three electric conductors erected upright at the lower end side of the body body. A contactor having an upper end formed in a soldered connection portion of a terminal of a power transistor and a lower end side protruding from the body of the body formed in a connection leg portion for connecting to a circuit pattern of a substrate. The connecting legs were connected to the circuit pattern, the body of the body was stopped on the circuit board, and the terminals of the transistor were soldered to the soldering connection portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection terminal which is useful when, for example, the terminal of a power transistor of an audio amplifier is connected to a circuit pattern formed on a circuit board.

[0002]

[Prior art]

Conventionally, the power transistor T is fixed to the heat sink H by a screw b or the like as illustrated in FIGS. 4 and 5, and the terminals t _{1 to} t ₃ of the transistor T are connected to the circuit pattern of the circuit board P. The so-called direct mounting structure is adopted by soldering Z to the solder Cp.

However, in the example illustrated in FIG. 4, since the circuit pattern Cp of the circuit board P is located on the back surface of the board P, the entire set including the circuit board P and the chassis is turned over. However, the soldering Z had to be carried out, and the work was troublesome.

Further, as shown in FIG. 4 above, when there is a soldering Z portion on the rear surface of the set, a main body (not shown, the rear surface of the chassis or the amplifier casing) is provided for future maintenance or the like. A large hole in the bottom) and a cover for closing this hole are indispensable, and it cannot be said to be advantageous in terms of the cost of the entire set.

On the other hand, as shown in FIG. 5, when the mounting surface of the transistor T of the heat sink H and the circuit board P are in contact with each other in a parallel direction, the work of soldering Z itself is performed. There is a problem of difficulty.

In view of the above points, as a dedicated component for connecting the terminals t _{1 to} t ₃ of the power transistor T mounted on the heat sink H and the circuit pattern Cp of the circuit board P, Although a component called a transistor socket Ts as shown in 6 has been developed and used, various problems have been pointed out and it is hardly used at present.

That is, the transistor socket Ts is a spring contact for inserting and connecting the respective terminals t _{1 to} t ₃ of the power transistor T into the main body Sh formed of an electrically non-conductive material such as a thin box-shaped synthetic resin. In addition to providing three types of contacts C ₁ , C ₂ , C ₃ and terminals r _{1 to} r ₃ for circuit connection, which are integrally formed with each of the contacts C _{1 to} C ₃ , FIG. Since it was used in the manner as illustrated in Example 1, the problem of soldering could be solved, but the following new problems were pointed out.

Therefore, in the transistor socket Ts shown in FIGS. 6 and 7, since the contacts C _{1 to} C ₃ connected to the terminals t _{1 to} t ₃ of the power transistor T are spring contact type, In addition to the heat generation of the transistor T, a large current flows, so that heat is generated at this contact portion, and there is a high possibility that the heat will hinder the electrical and mechanical performance of the socket Ts.

Further, when the pitch accuracy of each terminal t _{1 to} t ₃ of the power transistor T is rough, it is difficult to stably maintain the contact resistance with each contactor C _{1 to} C _{3 of} this socket. However, there is a problem in that the terminals t _{1 to} t ₃ cause the spring of the springs on the side of the contacts C _{1 to} C ₃ to settle.

In this regard, in order to stabilize the contact resistance between each of the terminals t _{1 to} t ₃ and each of the contacts C _{1 to} C ₃ , if the spring pressure of the contacts C _{1 to} C ₃ is increased, each terminal t ₁ insertion of ~t ₃ is difficult to, in the work, and lead to a bending of the terminal t ₁ ~t _3, rather it may take time to work.

[0011]

[Problems to be solved by the device]

 In view of the above-mentioned conventional techniques, the present invention does not have the problems of electrical characteristics and mechanical characteristics of a transistor socket, and has the workability problem of the conventional direct soldering. It is an object of the present invention to provide a terminal for connecting a power transistor that does not exist to a circuit board.

[0012]

[Means for Solving the Problems]

 The structure of the connection terminal of the present invention made for the purpose of solving the above-mentioned problems is a short rod-shaped body body formed of a non-conductor such as synthetic resin, and a standing body with the lower end side penetrating the body body. A contactor body formed of at least three conductors, the upper end of which is formed in a soldering connection portion of a terminal of a power transistor, and the lower end side of which is projected from the body is a circuit pattern of a board. The contact leg of the contact is connected to the circuit pattern, the body of the body is fixed on the circuit board, and the transistor terminal is connected to the soldering connection. It is characterized by being connected by soldering.

[0013]

[Action]

 With the connection terminal of the present invention, it is easy to connect the power transistor terminal fixed to the heat sink to the part where the power transistor terminal on the circuit pattern of the board should be connected, that is, soldering work. Since it can be formed in the same place where it is easy to carry out, and it can be formed in the same way as the orientation, soldering work becomes easier. Also, since the connection terminal and the transistor terminal are connected by soldering, the mechanical and electrical characteristics of this connection do not have the problems of a socket connection.

[0014]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of an example of the terminal of the present invention, FIG. 2 is a perspective view of an example of using the connection terminal of FIG. 1, and FIG. 3 is a perspective view of another example of the terminal of the present invention.

In FIG. 1, reference numeral 1 is a body of a terminal of the present invention formed of a non-conductor such as synthetic resin so as to have a short cross-section prismatic shape, and 2, 3 and 4 are the upper surface 1a side of the body 1 The contact body is a plate-like body made of a conductor such as brass that is erected in such a manner that its lower end penetrates the main body 1 and is exposed to the lower surface 1b side. It is molded integrally.

The contact bodies 2 to 4 are electrically independent of each other, and here, the terminals t _{1 to} t ₃ of the power transistor T are inserted at the upper ends of the contact bodies 2 to 4, respectively. Then, the notches 2a, 3a, 4a for supporting them from below and the horizontally oriented tongues 21a, 31a, 41a formed by bending the notches for forming the notches 2a-4a are formed. It is formed on the soldered connection part of the terminal.

On the other hand, the lower ends of the contactor bodies 2 to 4 are so-called vertical type connecting leg portions 2b, 3b, 4b which are extended substantially vertically from the lower surface of the body 1 here. Is formed in The lower ends of the legs 2b, 3b, 4b are folded back and forth in a substantially dogleg shape at a relatively shallow angle, so-called kinks 21b, 31b for holding in a charging hole (not shown) on the board side. 41b, and the connection terminal A of the present invention is formed by the above 1 to 41f. The lengths of the leg portions 2b to 4b and the structures of the kinks 21b to 41b are not limited to the examples shown in the figures, and any other length and any known structure will suffice.

An example of the connection terminal of the present invention formed as described above is used in a mode as shown in FIG. That is, in FIG. 2, the connection terminal A of the present invention is inserted into the predetermined insertion holes of the connection terminals A of the present invention on the circuit board P having the circuit pattern Cp formed on the back surface. Attach the terminals t _{1 to} t ₃ of the power transistor T fixed to the heat sink H by the screw b to the notches 21a to 41a of the soldered connection portions of the contact bodies 2 to 4, respectively. This part is soldered.

With this configuration, even if the circuit pattern Cp is on the back surface of the substrate P when viewed from the terminals t _{1 to} t ₃ of the power transistor T, the back surface is formed on the back surface as in the conventional structure shown in FIG. This eliminates the need for soldering work, and not only does it have good workability, but it also eliminates the need for a large hole on the back (bottom) of the set body for maintenance, etc., and a cover for closing this hole. become.

FIG. 3 shows the structure of the conventional example shown in FIG. 5 in which the mounting surface of the power transistor T of the heat sink H and the circuit board P are parallel to each other, and the connection terminal of another example of the present invention is used. It shows an example.

When the terminals t _{1 to} t ₃ of the power transistor T and the circuit board P are arranged as shown in FIG. 3, the connection legs 2b, 3b of the connection terminal of the present invention shown in FIG. 4b orientation is not applicable. In this case, the so-called angle type connection terminal of the present invention in which the connection legs 2b to 4b are bent in a direction parallel to the lower surface 1b of the body 1 is used.

[0022]

[Effect of device]

 The present invention is as described above, and when the direction and the positional relationship between the terminals of the power transistor and the circuit pattern of the circuit board to which they are connected have been such that it is difficult to solder, By using the connection terminal of the present invention, it is possible to completely eliminate the above-mentioned problems, which had problems of poor workability and complicated assembly of the set. Moreover, since the terminals of the power transistor are connected by soldering, the problem that occurs when a transistor socket is used does not occur.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a terminal of the present invention.

FIG. 2 is a perspective view of a usage example of the connection terminal of FIG.

FIG. 3 is a perspective view of another example of the present invention terminal.

FIG. 4 is a perspective view showing an example of a conventional connection mode between a terminal of a power transistor and a circuit pattern.

FIG. 5 is a perspective view showing another example of the conventional connection mode between the terminals of the power transistor and the circuit pattern.

FIG. 6 is a perspective view of an example of a transistor socket.

7 is a perspective view of a connection example using the socket of FIG.

[Explanation of symbols]

1 Body 2 to 4 Contact body H Heat sink T Power transistor t _{1 to} t ₃ Transistor terminal P Circuit board

Claims (2)

[Scope of utility model registration request] 1. A body of a short rod-shaped body made of a non-conductor such as synthetic resin, and a body of a contactor made up of at least three conductors erected from the body so that its lower end side penetrates. And the upper end of the contact is formed at the soldering connection part of the terminal of the power transistor and the lower end protruding from the body of the body is formed at the connection leg part of the board to the circuit pattern. A connection terminal characterized in that a connection leg portion of a child is connected to a circuit pattern, a body of the body is stopped on a circuit board, and a terminal of a transistor is soldered to the soldered connection portion. 2. The connection terminal according to claim 1, wherein the connection leg portion hangs from the lower surface of the body or is bent in an appropriate direction.