JP3323317B2 - Board connector - Google Patents

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 supply line to a board.

[0002]

2. Description of the Related Art In an industrial machine, a large-current board is used for a control circuit for controlling its operation. The large current substrate is connected to a power supply and supplied with a control current. To connect the board to the power supply, first connect a power supply line from a 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 The terminal block has a plurality of screw-type terminal portions formed therein, and a plurality of power lines can be drawn out by screwing ends of electric wires to the respective terminal portions.

[0003]

However, when the board is replaced or the board is taken out of the control unit at the time of maintenance, the screw of the terminal block is loosened to disconnect the power supply line from the terminal block, or the board is soldered. There is a problem that it is troublesome because it is necessary to melt the part and disconnect the power supply line.

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

Further, when connecting the substrate and the power supply line, a terminal block is always required, so that a space for mounting the terminal block on the control unit and a mounting operation are required. Therefore, the manufacturing cost is high.

Therefore, a board connector for directly attaching a power supply line to the board has been proposed (JP-B-59-47865, etc.). As shown in FIG. 4, the board connector 1 has a casing 7 in which a contact groove 5 into which the edge portion 3 of the circuit board is inserted and fitted and a receiving space 9 formed on both sides of the contact groove 5. And terminals 11 which are housed contact means. The terminal 11 is provided with a support rod 13 fixed in the receiving space 9.
And a leaf spring 15 locked in an arc shape to the support rod 13. By inserting the circuit board edge 3 between the terminals 11 accommodated in the receiving spaces 9 on both sides of the contact groove 5, the circuit board edge 3 is elastically sandwiched between the opposing leaf springs 15. The circuit board edge 3 and the terminal 11 are electrically connected so that a power supply line can be directly connected to the substrate.

However, the board connector 1 is
Since the contact between the circuit board edge 3 and the leaf spring 15 is not in surface contact, the contact area is small and can be used for a small current, but used for connection for a large current (for example, about 100 A). Can not.

Therefore, if the leaf spring 15 and the circuit board edge 3 are brought into surface contact with each other in order to increase the contact area of the leaf spring 15, when the circuit board edge 3 is inserted into the contact groove 5. , The insertion force increases, and the workability of connecting the circuit board edge 3 and the leaf spring 15 is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a board connector which can easily connect a power supply line to a board and can secure a sufficient contact area between a male terminal and a female terminal.

[0010]

In order to achieve the above object, an invention according to claim 1 is a board connector for connecting a power supply line to a board, comprising a plate-shaped male terminal connected to a terminal of the power supply line. Ri but Do and a female connector having a female terminal having a male connector which is integrally assembled to the insulating housing, the fitting part is connected to the substrate male terminal is fitted, the female
The terminal has a female terminal body that is a contact surface in which the inner surface of the fitting portion is in contact with both surfaces of the male terminal, and a connecting piece connected to the substrate and both sides of the male terminal protruding into the fitting portion. It is characterized by comprising a pair of elastic terminals having a plurality of abutting elastic pieces.

[0011]

According to a second aspect of the present invention, in the first aspect of the present invention, the female terminal is integrally attached to an insulating case.

[0013] According to a third aspect of the invention, an invention of claim 1, wherein, characterized in that the male pin, consists of two plate-shaped male terminal halves superimposed via the elastic member And

According to a fourth aspect of the present invention, there is provided the second or third aspect of the invention, further comprising a locking means for holding the housing to the case in a state where the male terminal is fitted to the female terminal.

[0015]

According to the first aspect of the present invention, the power supply line is connected to the board by fitting the male terminal of the terminal of the power supply 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 supply line can be easily removed from the board.

Moreover, both surfaces of the male terminal fitted to the fitting portion are in surface contact with the contact surface, and the elastic pieces of the pair of elastic terminals are in contact with each other.

According to the second aspect of the present invention, the female terminal
It is connected to the substrate in a state where it is assembled integrally with the insulating case. Thereby, the insulation of the female terminal on the substrate is ensured.

According to the third aspect of the present invention, when the male terminal is fitted to the fitting portion of the female terminal main body, the two plate-shaped male terminal halves superposed via the elastic body form the fitting portion. The respective contact surfaces are in contact with each other and are elastically held by the elastic pieces of the pair of elastic terminals. In this case, when the male terminal is fitted to the fitting portion, the elastic body between the two plate-shaped male terminal halves is bent, the thickness of the male terminal is reduced, and the male terminal is easily fitted into the fitting portion. Can be combined. Further, after the male terminal is fitted to the fitting portion, the male terminal is elastically sandwiched between the elastic pieces of the pair of elastic terminals and the elastic body, and has a contact surface with a constant contact pressure (contact pressure). And the elastic piece contacts.

According to a fourth aspect of the present invention, the male terminal of the electric wire terminal is connected to the board, fitted to the female terminal, and
By holding the housing in the case, accidental detachment of the male terminal and the female terminal is prevented.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the board connector 17 according to the present invention will be described below. FIG. 1 is an exploded perspective view showing the board connector 17, and FIG. 2 is a sectional view showing a procedure for fitting the male terminal 19 and the 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.
The male connector 25 is connected to the
And a female connector 29 connected thereto.

The male connector 25 is composed of two plate-shaped male terminal halves 33, 33 made of a conductive material such as a copper alloy (C1100) or a stainless steel plate superposed via an elastic body 31.
Is formed integrally with the two insulative housings 35a and 35b. One male terminal half 33 is a rectangular plate-shaped electric contact portion 3.
An electric wire connection portion 39 protrudes from one side of the wire 7. The other male terminal half 33 also has a rectangular plate-like electric contact portion 3.
7, an electric wire connecting portion 39 is protruded from one side. The conductive portion 2 of the power supply line 23 is located between the electric wire connection portions 39 and 39.
3a is crimped and crimped and connected. Further, the electric contact portions 37, 37 are overlapped via an elastic body 31 made of synthetic rubber. In this state, the wire connection portions 39, 3
9 face each other.

The elastic body 31 is made of synthetic rubber, spring, sponge,
The spring may be any of a compression coil spring, a torsion coil spring, and a leaf spring. In addition, the synthetic rubber, sponge, and foam easily apply a substantially uniform compressive force to the entire surface of the rectangular plate-shaped electric contact portion 37 as compared with the spring.
The thickness of the male terminal can be reduced substantially uniformly.

The housing 35 is integrally formed in a block shape by superimposing housings 35a and 35b having the same shape, and a part of the male terminal 19 is sandwiched therebetween. The housing 35a has an electric contact portion 3 on one side.
A housing part 41 for housing a part of the housing 7 is formed. On both sides of the housing part 41, outlets 43 for forming the electric wire connection parts 39, 39 to protrude outside the housing 35a are formed. . The outlets 4 are provided on both sides of the housing 35a.
With the formation of 3, 43, the electric wire connection portions 39, 39 of the male terminal 19 can be pulled out from any of the outlets 43, 43. Further, a through hole 45 is formed in the center of the housings 35a and 35b. And two housings 35a, 35
b, the receiving portions 41, 41 are opposed to each other, and the two male terminal halves 33, 33, which are overlapped with each other via the elastic body 31, are interposed therebetween.
The male terminal 19 is integrally assembled to the housings 35a and 35b by the screws 47 and the nuts 49 through which the male connector 25 is inserted, thereby forming the male connector 25.

The housings 35a and 35b are provided with a flexible lock arm 51 projecting from the outer periphery. The ends of these lock arms 51 are hook-shaped. 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 is
Insulating case 53 into which female terminal 21 is integrally assembled
Consists of The female terminal 21 includes a female terminal 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 body 59.

The female terminal main body 59 has a fitting portion 57 formed by bending a plate material into a concave shape, and inner walls of the fitting portion 57 facing each other are formed on both surfaces of the male terminal 19 and the outer surfaces of the male terminal halves 33, 33. )
Contact surfaces 63, 63 that come in contact with In addition, rectangular through-holes 67, 67, 67, 67, 67 are formed in the contact surfaces 63, 63 to communicate the inside and outside of the fitting portion 57, respectively. The outer surface of the fitting portion 57 is a flat mating surface on which the pair of elastic terminals 61 are overlapped.

The elastic terminal 61 has a plate-like shape, and has connection piece portions 71, 71, which are connected to connection holes 27a provided in the substrate 27.
71, 71, 71 and elastic pieces 73, 73, 73, 73, 73 having elasticity formed by cutting and raising are formed. When the elastic piece 73 is overlaid on the mating surface of the outer surface of the fitting portion 57, as shown in FIG.
It projects from the rectangular through window 67 into the fitting portion 57. When the elastic terminal 61 is superimposed on the mating surface of the fitting portion 57, the positioning piece 6 formed by bending both ends of the fitting portion 57 outward at substantially right angles.
5 and 65 are in contact with the lower surface side. This positioning piece 6
The reference numerals 5 and 65 are engaged with the opening edges of the terminal support holes 75 formed in the case 53 so as to position the female terminal main body 59 with respect to the case 53.

The case 53 has a block shape, and the above-described rectangular terminal support hole 75 is formed in the center portion so as to penetrate vertically. On the opposite inner wall of the terminal support hole 75,
A plurality of concave portions 77 and convex portions 79 are formed continuously and alternately. The female terminal body 59 and a pair of elastic terminals 61, 61 attached to the outside of the fitting portion 57 of the female terminal body 59 are inserted into the terminal support holes 75. In this state, as shown in FIG. 2A, the connection piece 71 of the elastic terminal 61 protrudes from the lower end of the case 53.

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

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 lock arm 51 described above. When the lock arm 51 is engaged with the locking groove 55, the housings 35a and 35b
Is held. 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 connected to either of the locking grooves 55. Can be engaged.

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

The male terminal 19 of the male connector 25 connected to the terminal of the power supply line 23 is connected to the female terminal 21
Is inserted into the fitting portion 57. At this time, the male terminal 19
The elastic body 31 between the two plate-shaped male terminal halves 33, 33 is bent, the thickness of the male terminal 19 is reduced, 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
7 are in surface contact with the contact surfaces 63, 63 of the
1 between the elastic piece 73 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 3
The outer surfaces of the members 3 and 33 do not separate from the contact surface 63, so that they can be securely 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 locking groove 55, and holds the housing 35 in the case 53. Thus, the power supply line 23 can be connected to the substrate 27.

When the power supply line 23 is disconnected from the substrate 27 from the state where the power supply line 23 is connected to the substrate 27, the engagement between the lock arm 51 and the locking groove 55 is released, and then the housing 35 is disconnected. Is separated from the case 53, and the male terminal 19 is extracted from the inside of the fitting portion 57.

As described above, the board connector 1 of this embodiment is
According to 7, the male terminal 19 connected to the terminal of the power line 23
The power line 23 and the board 27 can be connected simply by fitting the power line 23 to the fitting portion 57 of the female terminal 21 fixed to the board 27. Therefore, unlike the related art, the operation of screwing the ends of the electric wires to the terminal block or the like is not required, and the terminal block is not required. Also, when the substrate 27 and the power supply line 23 are separated by maintenance or the like, the fitting portion 57 of the female terminal 21 is also used.
The power supply line 23 can be easily removed from the board 27 by extracting the male terminal 19 from the terminal 27.

Further, a plurality of circuits formed on the substrate 27 and the power supply line can be connected and cut off at a time, and the operation time can be reduced.

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, a sufficient contact area can be secured, and a large current of about 100 A flows. It can also be used in cases. Male terminal 1
9 is also in elastic contact with the elastic terminal 61,
Even if a foreign substance is interposed between the contact surface 63 and the male terminal 19 and a slight gap is formed between the electric contact portion 37 of the male terminal 19 and the contact surface 63, the elastic piece 73 of the elastic terminal 61 follows. As a result, the contact always comes into contact with the male terminal half 33, so that the contact area can be reliably ensured. Therefore, it is possible to improve reliability in connection when used for a substrate for large current. In addition, gold plating, silver plating, copper plating,
If the electrical conductivity is improved by locally applying nickel plating, chrome plating, or the like, the reliability in connection can be further improved.

Further, according to the present embodiment, the male terminal 19
Is formed by the two male terminal halves 33, 33 via the elastic body 31, so that the insertion force at the time of insertion into the fitting portion 57 can be reduced. Moreover, the male terminal 1 to the fitting portion 57
Even if the insertion force of the elastic body 9 is lowered, the elastic body 3
Since the male terminal 19 is elastically held between the elastic piece 1 and the elastic piece 73, a necessary contact pressure (contact pressure) can be obtained.
Also, by making the male terminal 19 have such a configuration,
The inner diameter of the fitting portion 57 of the female terminal 21 can be easily managed, and the manufacturing cost can be reduced.

According to the present embodiment, for example, the substrate 2
Even if the number of connection holes 27a provided in the connector 7 is changed, if the number of connection pieces 71 of the elastic terminal 61 is changed, other portions can be shared, and the number of connection holes 27a of the substrate 27 can be changed. Can be easily handled, and versatility can be obtained.

Further, according to the present embodiment, the housing 35
Can be held by the locking means in the case 53, so that the housing 3
5 does not come off, and the male terminal 19 does not come off the female terminal 21 carelessly. Therefore, high reliability in connection can be obtained. Further, according to the present embodiment,
When the board 27 is manufactured, the female connector 29 is mounted on the board 27 together with other components (electronic components such as a resistor and a capacitor mounted on the board) so that soldering can be performed at the time of assembling with the power supply line. There is no need to perform any work, and the male connector 25 is crimped to the terminal of the power supply line 23, and the male connector 25 is connected to the female connector 29 on the board 27.
By simply connecting to the system, assembly can be easily performed, and the number of work steps can be reduced.

Further, since the elastic piece 73 is set to be weaker than the elastic force of the elastic body 31, the male terminal half 33 is surely brought into surface contact with the contact surface 63 by the elastic force of the elastic body 31.
Moreover, the male terminal half 33 and the contact surface 63 are brought into contact with each other by the contact pressure of the difference in elastic force between the elastic body 31 and the elastic piece 73.

In the above embodiment, the female terminal 21 is assembled integrally with the case 53. However, the case 53 is eliminated by assembling the elastic terminal 61 to the female terminal main body 59 with an adhesive or welding. Only the female terminals 21 may be attached to the substrate 27. In this case, if 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. In addition, a locking projection is formed at an end of the fitting hood portion, and the locking projection is engaged with a locking hole provided in the substrate 27, whereby
The housing 35 may be held on a substrate.

In the above embodiment, the male terminals 19 are integrally mounted on the two separate housings 35a, 35a. However, when the housing 35 is formed, a part of the male terminals 19 is embedded in the housing 35 by insert molding. The male terminal 19 may be assembled to the housing 35.

[0046]

As described above, according to the first aspect of the present invention, 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 board. Thus, the power supply line and the substrate can be easily connected or separated.

[0047] Moreover, the male terminals of the male connector plate-shaped and fitted into the fitting portion of the female terminal, by a contact surface with the male terminal surface contact, securing the contact area between the male and female terminals In addition, even if a foreign object is caught between the contact surface 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, thereby ensuring the contact area. Can be done.

According to the second aspect of the present invention, the female terminal is assembled to the insulating case, so that the insulating property on the substrate is ensured.

According to the third aspect of the present invention, when the male terminal is fitted to the fitting portion of the female terminal body, the male terminal is formed by stacking two plate-shaped male terminal halves via an 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. A necessary contact pressure can be obtained by the elastic force and the elastic force of the elastic connection piece of the elastic terminal, and the reliability in connection can be improved.

According to the fourth aspect of the present invention, the male terminal of the terminal of the power supply line is fitted into the female terminal fitting portion on the board, and the housing and the case are locked by the locking means, so that vibration and the like can be prevented. Thereby, the housing does not come off from the case, and the male terminal does not come off from the fitting portion of the female terminal carelessly.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing the inside of the male connector and the female connector of the board connector according to the present invention, and FIG. 2 (a) is a sectional view showing a state before the male terminal of the male connector is fitted to the female terminal of the female connector; (B) is a sectional view showing a state where the male terminal of the male connector is fitted to the female terminal of the 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;
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 Line 25 Male Connector 27 Board 29 Female Connector 31 Elastic Body 33 Plate-shaped Male Terminal Half 35a, 35b Housing 51 Lock Arm 55 Locking Groove 57 Fitting Portion 59 Female Terminal Main body 61 A pair of elastic terminals 63 Contact surface 71 Connecting piece 73 Elastic piece

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 5-75978 (JP, U) JP-A 3-19283 (JP, U) JP-A 61-16884 (JP, U) JP-A 62- 88384 (JP, U) Japanese Utility Model Hei 7-18364 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 9/16 H01R 12/04 H01R 24/14

Claims (4)

(57) [Claims] 1. A board connector for connecting a power supply line to a board, comprising: a male connector in which a plate-shaped male terminal connected to a terminal of the power supply line is integrally assembled in an insulating housing; Ri Do from the fitting part the male terminal is fitted is connected to a female connector having a female terminal having a said female terminal, the inner surface of the fitting portion contacts the respective opposite surfaces of said male terminals A female terminal main body which is a contact surface, and a pair of elastic terminals having a plurality of elastic pieces protruding from the connection piece connected to the substrate and the fitting section and abutting on both surfaces of the male terminal. A board connector characterized by comprising: 2. The board connector according to claim 1 , wherein said female terminal is integrally assembled to an insulating case. 3. A present invention according to claim 1, wherein said male terminal, the circuit board connector, characterized in that it consists of two plate-shaped male terminal halves superimposed via the elastic member . 4. The board connector according to claim 2 , further comprising a lock means for holding the housing to the case in a state where the male terminal is fitted to the female terminal. .