JP3763571B2 - PCB connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to miniaturization, robustness, and cost reduction of a printed circuit board connector.
[0002]
[Prior art]
A conventional printed circuit board connector will be described with reference to FIGS.
[0003]
The printed circuit board connector includes a receptacle-side connector 21 and a plug-side connector (not shown).
[0004]
The receptacle-side connector 21 includes an insulator 22 having a substantially rectangular box shape, and a large number of contacts 23 disposed on both sides inside the insulator 22 at a constant pitch.
[0005]
A fitting hole 22A for fitting the plug-side connector is formed at the center of the surface side of the insulator 22. A large number of grooves 22 </ b> B for holding the contacts 23 are formed on both side surfaces in the width direction inside the insulator 22.
[0006]
Each contact 23 includes a contact portion 23A for contacting the contact of the plug-side connector, a press-fit portion 23B that is press-fitted into the groove 22B of the insulator 22, a bent portion 23C, and a terminal portion 23D that is soldered to the printed circuit board. And are integrally formed continuously in a substantially L shape. The press-fit portion 23B has a tapered surface 23B1.
[0007]
The terminal portion 23 </ b> D of each contact 23 protrudes on both sides of the lower surface of the insulator 22.
[0008]
Note that the following printed circuit board connection device is described in Japanese Patent No. 2778881. The connection pin folded back into a substantially V shape is held by the spacer. The connection pin is formed integrally from a bent portion, a stopper portion at one end, and a terminal portion at the other end. The stopper portion is locked in the locking hole of the spacer, the terminal portion is soldered to the printed board, and the bent portion is inserted into the through hole of another printed board.
[0009]
[Problems to be solved by the invention]
The conventional printed circuit board connector has the following problems.
[0010]
1. When the connector is reduced in size, reduced in height, and narrowed in pitch, the entire insulator is reduced in size. Therefore, deformation and cracking of the insulator occur due to stress generated when the contact is pressed into the insulator, and deformation of the insulator occurs due to heat generated when the contact is soldered to the printed circuit board.
[0011]
2. In order to avoid the above 1, the press-fitting allowance is set small and the measure to reduce the press-fitting stress is adopted. However, since it is necessary to prevent the contact from being easily pulled out from the insulator, the press-fitting allowance is small. Setting is difficult.
[0012]
3. Since the contact is press-fitted and held in the insulator, the dimensions of the contact and the insulator must be strictly regulated. As a result, it becomes difficult to manufacture the mold and parts, and the cost is increased.
[0013]
4). In order to stably press-fit and hold the contact in the insulator, the contact requires a press-fitting portion and the insulator needs a press-fitting portion corresponding to the press-fitting portion. Therefore, the connector is inevitably increased by the size of the press-fitted part and the press-fitted part.
[0014]
Therefore, the present invention aims to provide a printed circuit board connector that improves the drawbacks of the conventional printed circuit board connector and is small, robust, easy to manufacture, and inexpensive.
[0015]
[Means for Solving the Problems]
The present invention employs the following means in order to explain the above problems.
[0016]
The insulator includes a plurality of contacts that are respectively held to face the insulator, and the insulator is formed with a fitting hole for fitting a mating connector, and the fitting hole is further centered. Symmetrically, a plurality of substantially L-shaped contact receiving grooves and a plurality of through holes continuing to the contact receiving grooves are respectively formed, and each front contact has a locking portion with respect to the bottom surface of each contact receiving groove, The contact portion of the mating connector with respect to the contact, the bending portion, the parallel portion with respect to the contact portion, and the terminal portion are continuously integrated in a substantially hairpin shape, and each of the locking portions is configured with each of the contacts. Before insertion into the insulator is bent approximately 90 ° to prevent withdrawal in the insertion direction, and each terminal portion is connected to the insulator of each contact. It is approximately 90 ° bent after insertion connector for printed circuit board to prevent the extraction of the non-insertion direction.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
A receptacle-side connector in a printed circuit board connector according to an embodiment of the present invention will be described with reference to FIGS.
[0018]
The printed circuit board connector includes a receptacle-side connector 1 and a plug-side connector (not shown).
[0019]
As shown in FIG. 1, the receptacle-side connector 1 is composed of an insulator 2 having a substantially rectangular box shape, and a large number of contacts 3 disposed on both sides inside the insulator 2 so as to face each other at a constant pitch. .
[0020]
In the center of the insulator 2 on the surface side, a fitting hole 2A for fitting the plug-side connector is formed. Further, as shown in FIG. 2, a large number of contact receiving grooves 2 </ b> B for holding the respective contacts 3 are formed on both side surfaces and the bottom surface in the width direction inside the insulator 2. Each contact accommodating groove 2B is formed in a substantially L shape. Further, on both sides in the width direction on the inner bottom surface of the insulator 2, through holes 2C are formed which are continuous with the respective contact receiving grooves 2B.
[0021]
Each contact 3 is substantially composed of a locking portion 3A for the inner bottom surface of the insulator 2, a contact portion 3B for the contact of the plug-side connector, a convex curved portion 3C, a parallel portion 3D for the contact portion 3B, and a terminal portion 3E. Consisting of a hairpin shape and integrated into one piece. However, in the state shown in FIG. 2, the locking portion 3A of the contact 3 is bent by approximately 90 ° with respect to the contact portion 3B.
[0022]
A method of incorporating each contact 3 into the insulator 2 will be described with reference to FIGS. In the state of FIG. 2, each contact 3 is inserted into each contact receiving groove 2 </ b> B of the insulator 2 in the direction of the arrow. Then, the terminal portion 3E of each contact 3 is inserted into each through-hole 2C of the insulator, and the locking portion 3A of each contact 3 is an abutting portion 2D (that is, a contact receiving groove 2B) formed on the inner bottom surface of the insulator 2. To the state shown in FIG. Subsequently, as shown in FIG. 4, each terminal portion 3 </ b> E is bent outward by approximately 90 ° in the direction of the arrow. Each terminal portion 3E is soldered to a printed board (not shown).
[0023]
Since the dimension is set so that a minute gap exists between each contact 3 and each contact receiving groove 2B and each through hole 2C of the insulator 2, it is based on incorporating each contact 3 into the insulator 2. No stress is generated. The locking portion 3A of each contact 3 serves to prevent each contact 3 from being pulled out from the insulator 2 in the insertion direction and tilting with respect to the insulator 2, and the terminal portion 3E It plays the role of preventing the insulator 2 from being pulled out in the anti-insertion direction.
[0024]
FIG. 5 is a perspective view showing the receptacle-side connector 1 that has been assembled in a broken state. FIG. 6 is a perspective view of the final shape of the contact 3.
[0025]
The present embodiment is a receptacle-side connector, but the present invention is not limited to this and can be applied to general printed circuit board connectors.
[0026]
【The invention's effect】
As will be apparent from the above description, the present invention provides the following effects.
[0027]
1. Since there is room in setting the dimensions of the contacts and insulators, high precision is not required for the mold and parts, so the cost of the connector is reduced.
[0028]
2. Since a large space for locking the contact to the insulator becomes unnecessary, it is easy to reduce the size and height of the connector.
[0029]
3. Unlike the conventional technique, when the contact is inserted into the insulator, no press-fitting stress is generated, so that the insulator is not deformed or cracked. Therefore, it is easy to reduce the contact pitch in the connector.
[0030]
4). Since the contact locking portion and the terminal portion are bent, it is possible to reliably prevent the contact from being pulled out in the insertion direction and the counter-insertion direction.
[0031]
5. The contact locking portion prevents the contact from tilting with respect to the insulator.
[Brief description of the drawings]
FIG. 1 is a three-side view of a receptacle-side connector according to an embodiment of a printed circuit board connector of the present invention, where (a) is a front view, (b) is a front view, and (c) is a side view. Show.
FIG. 2 is a cross-sectional view of the same receptacle-side connector in a state before a contact is incorporated into an insulator.
FIG. 3 is a cross-sectional view of the receptacle-side connector in a state where the contact is being assembled into the insulator.
FIG. 4 is a cross-sectional view of the receptacle-side connector in a state after the contact is assembled in the insulator.
FIG. 5 is a perspective view showing the receptacle-side connector in a state where the assembly of the contact into the insulator is completed, being broken.
FIG. 6 is a perspective view of a final shape of the contact.
FIG. 7 is a perspective view of a receptacle-side connector in a conventional printed circuit board connector.
FIG. 8 is a perspective view of a contact in the receptacle-side connector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Receptacle side connector 2 Insulator 2A Fitting hole 2B Contact accommodating groove 2C Through-hole 2D Contact part 3 Contact 3A Locking part 3B Contact part 3C Convex-shaped curved part 3D Parallel part 3E Terminal part

Claims (1)

It is composed of an insulator and a plurality of contacts that are respectively held facing the insulator,
The insulator is formed with a fitting hole for mating with the mating connector, and is further provided in a plurality of substantially L-shaped contact receiving grooves and the contact receiving grooves symmetrically about the fitting hole. A plurality of continuous through holes are formed,
Each front contact is formed in a substantially hairpin shape from a locking portion with respect to the bottom surface of each contact receiving groove, a contact portion with respect to the contact of the mating connector, a curved portion, a parallel portion with respect to the contact portion, and a terminal portion. And is configured as one
Each locking portion is bent approximately 90 ° before insertion of each contact into the insulator to prevent extraction in the insertion direction,
The printed circuit board connector according to claim 1, wherein each of the terminal portions is bent by approximately 90 ° after insertion of each of the contacts into the insulator to prevent removal in a counter-insertion direction.

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