JPH07220781A - Connector for board - Google Patents

Abstract

PURPOSE:To sufficiently ensure a contact area between male/female terminals with easy connection between a power supply line and a board, by fitting the plate-shaped male terminal of a male connector, connected to the end of the power supply line, to the female terminal connected to the board. CONSTITUTION:A male terminal 19 of a male connector 25 connected to the end of a power supply line is inserted into a fitting part 57 of a female terminal 21 connected to a board 27. Here in the male terminal 19, an elastic unit 31 between two sheets of plate-shaped male terminal half bodies 33 is deflected to decrease a thickness of the male terminal 19, and it can be easily inserted into the fitting part 57. When the male terminal 19 is inserted into the fitting part 57, an external surface of the male terminal 19 is brought into surface contact with a contact surface 63 of the fitting part 57, to also elastically interpose the male terminal half body 33 between an elastic piece part 73 of an elastic terminal 61 and the elastic unit 31. When the male terminal 19 is completely inserted into the fitting part 57, a lock arm 51 is engaged with a stop groove 55, to hold housings 35a, 35b to a case 53.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board connector for connecting a power line to a board.

[0002]

2. Description of the Related Art In an industrial machine, a large current board is used in a control circuit that controls the operation of the machine. A control current is supplied to the high-current board by being connected to a power supply. To connect the board to the power supply, first connect the power supply line from the commercial power supply or power supply circuit to the terminal block, pull out the required number of power supply lines from this terminal block, and solder the terminal to each circuit on the board. Connected by. This terminal block is formed with a plurality of screw-type terminal portions, and a plurality of power lines can be drawn out by screwing the ends of the electric wires to the respective terminal portions.

[0003]

However, when the board is taken out of the control unit during the replacement of the board or the maintenance, the screw of the terminal block is loosened to disconnect the power supply line from the terminal block, or soldering is performed. There is a problem that it takes time because it is necessary to melt the part and remove the power line.

Further, when the number of power supply lines drawn from the terminal block is large, there is a problem that it takes a lot of time to remove each power supply line from the terminal block and the board, which takes time.

Furthermore, when connecting the substrate and the power supply line, a terminal block is always required, so that a space for mounting the terminal block in the control section and a mounting work are required. Therefore, the manufacturing cost is high.

Therefore, a board connector has been proposed in which the power supply line is directly attached to the board (Japanese Patent Publication No. 59-47865). As shown in FIG. 4, the board connector 1 includes a casing 7 having a contact groove 5 into which the circuit board edge portion 3 is inserted and fitted, and a receiving space 9 formed on both sides of the contact groove 5. It is composed of the terminal 11 which is the accommodated contact means. The terminal 11 is a support rod 13 fixed to the receiving space 9.
And a leaf spring 15 locked to the support rod 13 in an arc shape. Then, by inserting the circuit board edge portion 3 between the terminals 11 housed in the receiving spaces 9 on both sides of the contact groove 5, the circuit board edge portion 3 is elastically sandwiched between the opposing leaf springs 15. The circuit board edge portion 3 and the terminal 11 are electrically connected, and the power source line can be directly connected to the substrate.

However, the board connector 1 is
Since the contact between the circuit board edge portion 3 and the leaf spring 15 does not come in contact with each other on the surface, the contact area is small and can be used for a small current, but it is used for connection for a large current (for example, about 100 A). I can't.

Therefore, in order to increase the contact area of the leaf spring 15, the leaf spring 15 and the circuit board edge portion 3 are brought into surface contact with each other, and when the circuit board edge portion 3 is inserted into the contact groove 5. Frictional force increases and the insertion force increases, which causes a problem that connection workability between the circuit board edge portion 3 and the plate spring 15 is poor.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a board connector in which the power supply line and the board can be easily connected and the contact area between the male terminal and the female terminal can be sufficiently secured.

[0010]

To achieve the above object, the invention according to claim 1 is a board connector for connecting a power supply line to a board, which is a plate-shaped male terminal connected to a terminal of the power supply line. Is composed of a male connector integrally assembled in an insulative housing, and a female connector provided with a female terminal having a fitting portion which is connected to a substrate and into which the male terminal is fitted.

A second aspect of the present invention is the invention according to the first aspect, wherein the inner surface of the fitting portion is a contact surface for contacting both surfaces of the male terminal, and the female terminal body is connected to the board. It is characterized in that it is composed of a pair of elastic terminals having a plurality of elastic piece portions projecting in the piece portion and the fitting portion and contacting both surfaces of the male type terminal.

The invention according to claim 3 is the invention according to claim 2, characterized in that the female terminal is integrally assembled to an insulating case.

The invention according to claim 4 is the invention according to claims 2 and 3, characterized in that the male terminal is composed of two plate-shaped male terminal halves superposed with an elastic body interposed therebetween. I am trying.

The invention according to claim 5 is the invention according to claims 3 and 4, characterized in that it has lock means for holding the housing in the case with the male terminal fitted in the female terminal.

[0015]

According to the first aspect of the present invention, the power line is connected to the board by fitting the male terminal of the terminal of the power line into the fitting portion of the female terminal connected to the board. Further, by pulling out the male terminal from the fitting portion of the female terminal, the power line can be easily removed from the board.

According to the invention of claim 2, the male terminal of the terminal of the power supply line is fitted to the fitting portion of the female terminal connected to the substrate,
The power supply line and the substrate are connected by bringing both surfaces of the male terminal into contact with the inner contact surface of the fitting portion. In this case, both surfaces of the male terminal fitted in the fitting portion are in surface contact with the contact surface, and the elastic piece portions of the pair of elastic terminals abut.

According to the invention described in claim 3, the female terminal comprises:
It is connected to the substrate in a state where it is integrally assembled to the insulating case. This ensures the insulation of the female terminals on the substrate.

According to the fourth aspect of the invention, when the male terminal is fitted into the fitting portion of the female terminal body, the two plate-shaped male terminal halves superposed with the elastic body interposed therebetween become the fitting portion. The elastic pieces are in contact with the contact surfaces and are elastically sandwiched by the elastic pieces of the pair of elastic terminals. In this case, when the male terminal is fitted in the fitting portion, the elastic body between the two plate-shaped male terminal halves bends, the thickness of the male terminal becomes thin, and the male terminal is easily fitted in the fitting portion. Can be combined. Further, the male terminal is elastically sandwiched between the elastic piece portion of the pair of elastic terminals and the elastic body after being fitted to the fitting portion, and the contact surface is kept at a constant contact pressure (contact pressure). And the elastic piece contact.

According to a fifth aspect of the present invention, the male terminal of the electric wire terminal is connected to the substrate, fitted into the female terminal, and is locked by the locking means.
Holding the housing in the case prevents accidental disengagement of the male and female terminals.

[0020]

EXAMPLES Examples of the board connector 17 according to the present invention will be described below. FIG. 1 is an exploded perspective view showing a board connector 17, and FIG. 2 is a sectional view showing a procedure for fitting a male terminal 19 and a female terminal 21.

As shown in FIGS. 1 and 2, the board connector 17 is a male connector 25 connected to the end of the electric wire 23.
And the male connector 25 is connected, the board 27
And a female connector 29 connected to the.

The male connector 25 is composed of two plate-shaped male terminal halves 33, 33 made of a conductor such as a copper alloy (C1100) and a stainless steel plate which are superposed with an elastic body 31 interposed therebetween.
The male terminal 19 made of is formed integrally with the two insulative housings 35a and 35b. One male terminal half 33 is a rectangular plate-shaped electrical contact portion 3
An electric wire connecting portion 39 is provided so as to project from one side portion of 7. In addition, the other male terminal half 33 also has a rectangular plate-shaped electrical contact portion 3
A wire connecting portion 39 is provided so as to project from one side of 7. The conductive portion 2 of the power supply line 23 is provided between the electric wire connecting portions 39, 39.
3a is crimped and caulked and connected. Further, the electric contact portions 37, 37 are overlapped with each other via the elastic body 31 made of synthetic rubber. In this state, the wire connecting portions 39, 3
9 are opposed to each other.

The elastic body 31 is made of synthetic rubber, spring, sponge,
It may be any of foam, and the spring may be any of a compression coil spring, a torsion coil spring, and a leaf spring. Further, synthetic rubber, sponge, and foam are more likely to apply a compressive force to the entire surface of the rectangular plate-shaped electric contact portion 37 more uniformly than a spring,
The thickness of the male terminal can be reduced substantially uniformly.

The housing 35 is integrally formed in a block shape by superposing housings 35a and 35b having the same shape, and a part of the above-mentioned male terminal 19 is sandwiched therebetween. The housing 35a has an electric contact portion 3 on one surface side.
A housing portion 41 for housing a part of the housing 7 is formed, and outlets 43, 43 for allowing the wire connection portions 39, 39 to project to the outside of the housing 35a are formed on both sides of the housing portion 41. . The outlets 4 are provided on both sides of the housing 35a.
By forming the portions 3 and 43, the wire connection portions 39 and 39 of the male terminal 19 can be pulled out from any of the outlets 43 and 43. Further, a through hole 45 is formed in the central portion of the housings 35a and 35b. And the two housings 35a, 35
b are opposed to each other so that the accommodating portions 41, 41 face each other, and the two male terminal halves 33, 33 superposed with the elastic body 31 interposed therebetween are sandwiched between the through holes 45.
The male terminal 19 is integrally assembled to the housings 35a and 35b by the screw 47 and the nut 49 which are inserted into the male connector 25.

A flexible lock arm 51 is projectingly provided from the outer periphery of the housings 35a and 35b. These lock arms 51 have a hook-shaped tip. The hook-shaped tip portion engages with a locking groove 55 of the case 53 described later.

On the other hand, the female connector 29 has a female terminal 21,
Insulating case 53 in which the female terminal 21 is integrally assembled
Consists of. The female terminal 21 is composed of a female terminal main body 59 having a fitting portion 57 into which the male terminal 19 is inserted and fitted, and a pair of elastic terminals 61 assembled to the female terminal main body 59.

The female terminal main body 59 has a fitting portion 57 formed by bending a plate material in a concave shape. The inner walls of the fitting portion 57 facing each other are on both sides of the male terminal 19 (outer surfaces of the male terminal halves 33, 33). )
The contact surfaces 63, 63 are in contact with. Further, rectangular through windows 67, 67, 67, 67, 67, which communicate the inside and outside of the fitting portion 57, are formed on the contact surfaces 63, 63, respectively. The outer surface of the fitting portion 57 is a flat mating surface on which the pair of elastic terminals 61 are superposed.

The elastic terminal 61 is plate-shaped, and has connecting piece portions 71, 71, which are connected to the connecting holes 27a provided in the substrate 27.
71, 71, 71 and elastic piece portions 73, 73, 73, 73, 73 having elasticity formed by cutting and raising. As shown in FIG. 2A, the elastic piece 73 in the state of being overlapped with the mating surface of the outer surface of the fitting portion 57,
The rectangular through window 67 projects into the fitting portion 57. Further, the elastic terminal 61, in a state of being overlapped with the mating surface of the fitting portion 57, has the positioning piece portion 6 formed by bending both ends of the fitting portion 57 outward at a substantially right angle.
It is in contact with the lower surface side of 5, 65. This positioning piece 6
5 and 65 engage with the opening edge of the terminal support hole 75 formed in the case 53 at 75a, and the female terminal main body 59 is positioned in the case 53.

The case 53 is block-shaped, and the above-mentioned rectangular terminal support hole 75 is formed at the center thereof so as to penetrate therethrough vertically. The opposing inner walls of the terminal support hole 75 are
A plurality of concave portions 77 and convex portions 79 are continuously and alternately formed. Inside the terminal support hole 75, a female terminal main body 59 and a pair of elastic terminals 61, 61 assembled outside the fitting portion 57 of the female terminal main body 59 are inserted. In this state, as shown in FIG. 2A, the connecting piece 71 of the elastic terminal 61 projects from the lower end side of the case 53.

The recess 77 corresponds to the through window 67 and the elastic piece 73, and forms a bending space for the elastic piece 73. Further, as shown in FIG. 3, a protrusion 72 is provided at the lower end of the convex portion 79 so as to project. The protrusion 72 supports the lower end portion of the elastic terminal 61, and
1 is held between the inner wall of the case 53 and the female terminal body 59 to prevent the case 1 from falling off.

Further, as shown in FIG. 1, locking grooves 55 are formed at four corners of the outer periphery of the case 53. The locking groove 55 forms a locking means together with the above-described lock arm 51, and when the locking arm 51 is engaged with the locking groove 55, the housings 35a and 35b have the case 53.
Held in. By providing the locking grooves 55 at the four corners of the case 53, even if the fitting direction of the male terminal 19 to the female terminal 21 is reversed, the locking arms 51 of the housings 35a and 35b can be locked by any one of the locking grooves 55. Can be engaged with.

Next, a connection procedure for connecting the power supply line 23 to the board 27 will be described with reference to FIG.

The male terminal 19 of the male connector 25 connected to the terminal of the power line 23 is replaced with the female terminal 21 connected to the substrate 27.
It is inserted into the fitting portion 57 of. At this time, the male terminal 19
The elastic body 31 between the two plate-shaped male terminal halves 33, 33 bends, the thickness of the male terminal 19 becomes thin, and the male terminal 19 can be easily inserted into the fitting portion 57.

When the male terminal 19 is inserted into the fitting portion 57,
The outer surfaces of the two plate-shaped male terminal halves 33, 33 are fitted with the fitting portion 5.
7, the surface contact with the contact surfaces 63, 63, and the elastic terminal 6
Male terminal half 3 between the elastic piece 73 of 1 and the elastic body 31.
3, 33 are elastically clamped. In this case, the difference in elastic force between the elastic body 31 and the elastic piece portion 73 becomes a contact pressure, and the male terminal half body 3
The outer surfaces of 3, 33 are not separated from the contact surface 63, and can be reliably contacted.

When the male terminal 19 is completely inserted into the fitting portion 57 of the female terminal 21, the lock arm 51 engages with the engaging groove 55 and holds the housing 35 in the case 53. As a result, the power supply line 23 can be connected to the substrate 27.

When the power supply line 23 is removed from the board 27 from the state where the power supply line 23 is connected to the board 27, the engagement state between the lock arm 51 and the engagement groove 55 is released, and then the housing 35 is released. Is separated from the case 53, and the male terminal 19 is pulled out from the fitting portion 57.

Thus, the board connector 1 of this embodiment
7, the male terminal 19 connected to the terminal of the power line 23
It is possible to connect the power supply line 23 and the board 27 by simply fitting the above to the fitting portion 57 of the female terminal 21 fixed to the board 27. Therefore, unlike the prior art, the work of screwing the end of the electric wire to the terminal block or the like becomes unnecessary, and the terminal block becomes unnecessary. In addition, the fitting portion 57 of the female terminal 21 is also used when the board 27 and the power supply line 23 are separated for maintenance or the like.
The power supply line 23 can be easily removed from the substrate 27 by pulling out the male terminal 19 from the.

Furthermore, a plurality of circuits formed on the substrate 27 and the power supply line can be connected and disconnected at one time, and the working time can be shortened.

Further, according to this embodiment, since both surfaces of the male terminal 19 and the contact surface 63 of the female terminal 21 are in surface contact with each other, a sufficient contact area can be secured and a large current of about 100 A flows. It can also be used in cases. Also, male terminal 1
Since 9 also makes elastic contact with the elastic terminal 61,
Even if a foreign substance is sandwiched between the contact surface 63 and the male terminal 19 and a slight gap is generated between the electric contact portion 37 of the male terminal 19 and the contact surface 63, the elastic piece portion 73 of the elastic terminal 61 follows. Since the male terminal half 33 is always brought into contact with the male terminal half 33, the contact area can be surely secured. Therefore, it is possible to improve the reliability of the connection when the substrate is used for a large current. The elastic piece 73 has gold plating, silver plating, copper plating,
If the electrical conductivity is improved by locally applying nickel plating, chrome plating, etc., the reliability in connection can be further improved.

Further, according to this embodiment, the male terminal 19
Is formed by the two male terminal halves 33, 33 via the elastic body 31, it is possible to reduce the insertion force at the time of insertion into the fitting portion 57. Moreover, the male terminal 1 to the fitting portion 57
Even if the insertion force of 9 is lowered, the elastic body 3 remains in the fitted state.
Since the male terminal 19 is elastically sandwiched between 1 and the elastic piece portion 73, a necessary contact pressure (contact pressure) can be obtained.
Further, by configuring the male terminal 19 with such a configuration,
The inner diameter of the fitting portion 57 of the female terminal 21 can be easily controlled, and the manufacturing cost can be reduced.

Further, according to this embodiment, for example, the substrate 2
Even if the number of the connection holes 27a provided in 7 is changed, if the number of the connection piece portions 71 of the elastic terminal 61 is changed, the other portion can be shared, and the number of the connection holes 27a of the substrate 27 can be changed. Can be easily dealt with and versatility is obtained.

Further, according to this embodiment, the housing 35
Since the case 53 can be held in the case 53 by the locking means, the case 3 can be carelessly moved from the case 53 to the housing 3 due to vibration or the like.
5 does not come off, and the male terminal 19 does not come off from the female terminal 21 carelessly. Therefore, high reliability in connection can be obtained. Furthermore, according to this embodiment,
When the board 27 is manufactured, the female connector 29 is pre-assembled on the board 27 together with other parts (electronic parts such as resistors and capacitors mounted on the board), so that soldering can be performed at the time of assembling work with the power line. It is not necessary to perform any work, and the male connector 25 is caulked and connected to the terminal of the power line 23, and the male connector 25 is connected to the female connector 29 on the board 27.
It can be easily assembled by simply connecting with, and the number of work steps can be reduced.

Since the elastic piece 73 is set to be weaker than the elastic force of the elastic body 31, the elastic force of the elastic body 31 ensures that the male terminal half body 33 comes into surface contact with the contact surface 63.
Moreover, the male terminal half body 33 and the contact surface 63 come into contact with each other by the contact pressure due to the difference in elastic force between the elastic body 31 and the elastic piece portion 73.

In the above embodiment, the female terminal 21 is integrally assembled to the case 53. However, by assembling the elastic terminal 61 to the female terminal main body 59 with an adhesive, welding, or the like, the case 53 is eliminated, Only the female terminal 21 may be attached to the board 27. In this case, when a cover for ensuring the insulation of the case 53 is required, a hood portion is formed in the housing 35 of the male connector 25 and the male terminal 19 is fitted to the fitting portion 57 of the female terminal 21. The female terminal 21 may be covered in this state. Further, by forming a locking projection on the end of the fitting hood and engaging this locking projection with a locking hole provided in the board 27,
The housing 35 may be held on the substrate.

Further, in the above embodiment, the male terminal 19 is integrally assembled to the two split housings 35a, 35a. However, when the housing 35 is molded, a part of the male terminal 19 is integrally embedded so that the male terminal 19 is integrally molded. The male terminal 19 may be attached to the housing 35.

[0046]

As described above, according to the invention of claim 1, the plate-shaped male terminal of the male connector connected to the terminal of the power supply line is fitted to the fitting portion of the female terminal connected to the substrate. As a result, the power supply line and the substrate can be easily connected or separated.

According to the invention of claim 2, when the plate-shaped male terminal of the male connector is fitted into the fitting portion of the female terminal, the male terminal and the contact surface come into surface contact with each other, so that the male terminal and the female terminal are connected. Contact area of the male terminal and the contact surface of the male terminal and the female terminal, even if foreign matter is caught between the contact surfaces of the male terminal and the female terminal, the elastic piece of the elastic terminal is always in contact with both surfaces of the male terminal. It can be ensured.

According to the third aspect of the invention, the female terminal is assembled in the insulating case, so that the insulating property on the substrate is secured.

According to the fourth aspect of the present invention, when the male terminal is fitted into the fitting portion of the female terminal body, the two male terminal halves in the form of a plate are superposed on each other via the elastic body. The thickness is reduced, the insertion force of the male terminal into the fitting part is reduced, and the male terminal can be easily inserted into the fitting part. Due to the elastic force and the elastic force of the elastic connection piece of the elastic terminal, a necessary contact pressure can be obtained and the reliability in connection can be improved.

According to the fifth aspect of the present invention, the male terminal of the terminal of the power supply line is fitted into the fitting portion of the female terminal on the board, and the housing and the case are locked by the locking means, so that the vibration or the like is generated. Thus, the housing does not come off from the case, and the male terminal does not come off accidentally from the fitting portion of the female terminal.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a board connector according to the present invention.

FIG. 2 shows the inside of a male connector and a female connector of a board connector according to the present invention, and FIG. 2 (a) is a sectional view showing a state before fitting a male terminal of a male connector to a female terminal of a female connector, (B) is sectional drawing which shows the state which fitted the male terminal of a male connector to the female terminal of a female connector.

FIG. 3 shows a state in which the male terminal of the male connector is fitted to the female terminal of the female connector, and is taken along line III-III in FIG. 2 (b).
It is sectional drawing cut | disconnected along the line.

FIG. 4 is a perspective view showing a conventional board connector.

[Explanation of symbols]

 17 Board Connector 19 Male Terminal 21 Female Terminal 23 Power Supply Wire 25 Male Connector 27 Board 29 Female Connector 31 Elastic Body 33 Plate-shaped Male Terminal Half Body 35a, 35b Housing 51 Lock Arm 55 Locking Groove 57 Fitting Part 59 Female Terminal Body 61 Pair of elastic terminals 63 Contact surface 71 Connection piece 73 Elastic piece

Claims (5)

[Claims] 1. A board connector for connecting a power supply line to a board, wherein a plate-shaped male terminal connected to an end of the power supply line is integrally assembled in an insulating housing, and the board. And a female connector provided with a female terminal having a fitting portion to which the male terminal is fitted. 2. The invention according to claim 1, wherein an inner surface of the fitting portion is a contact surface that is in contact with both surfaces of the male terminal, a connecting piece portion connected to the board, and A board connector, comprising: a pair of elastic terminals having a plurality of elastic piece portions protruding in the fitting portion and contacting both surfaces of the male terminal. 3. The board connector according to claim 2, wherein the female terminal is integrally assembled to an insulating case. 4. The board connector according to claim 2 or 3, wherein the male terminal is composed of two plate-shaped male terminal halves stacked with an elastic body interposed therebetween. . 5. The board connector according to claim 3, further comprising locking means for holding the housing in the case with the male terminal fitted to the female terminal. .