JPH0426190B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to an improvement of a connector having a double terminal locking structure.

[Conventional technology]

Terminals in connectors are generally fixed by providing a cut-and-raised piece on the terminal and engaging the bottom wall of the terminal accommodation chamber in the insulating housing, or by forming an integral piece from the top wall of the accommodation chamber. A flexible locking arm was engaged with and secured to the shoulder or hole of the electrical contact portion of the terminal.

However, the cut and raised pieces and locking arms are small, and
The male connector was easily damaged by repeated attachment and detachment, and had drawbacks such as terminals falling out and poor contact.

Therefore, as disclosed in Japanese Utility Model Publication No. 54-28625, a through hole is provided in the insulating housing housing the terminal, and an insertion pin is inserted through this through hole, and the side surface of the insertion pin is connected to the electrical contact part of the terminal. There is a device that engages with a shoulder portion or the like of the terminal, and double-locks the terminal and the accommodation chamber together with a means for preventing the terminal from coming off.

[Problem that the invention seeks to solve]

However, the conventional insertion pin for double locking the terminal is a separate component from the insulating housing, and is designed to be inserted into the above-mentioned through hole after the terminal is inserted into the housing chamber. Therefore, there is a risk that defective products may be produced due to failure to insert the insertion pin after the terminal is inserted, and the number of connector parts increases, making inventory management redundant. Furthermore, the insertion pin serves to prevent the terminal from coming off, and there is a problem in that it is not possible to suppress the wobbling of the terminal, that is, the movement of the insertion pin in the axial direction.

Therefore, we have developed a double locking structure that allows the insertion pin for double locking of the terminal to be temporarily locked in the insulating housing and handled as one component, and that can be fully locked after the terminal is inserted, and also prevents the terminal from wobbling. There was a demand for the development of a connector with

An object of the present invention is to provide a connector that meets such demands.

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Means for solving problems] The present invention will be specifically described below with reference to drawings showing embodiments.

Fig. 1 is an exploded perspective view of the connector of the present invention, Fig. 2 is an exploded perspective view of the connector of the present invention.
Fig. 3 is a cross-sectional view of the insertion pin in the above connector in a temporarily locked state, Fig. 3 is a cutaway perspective view of the second main part, Fig. 4 is a sectional view of the insertion pin in the above connector in the fully locked state, and Fig. 5 is a sectional view of the insertion pin in the temporarily locked state. A cutaway perspective view of the main part of FIG. 4 is shown.

In these figures, the connector A of the present invention is
A locking means 2 is provided between each terminal 3 and a plurality of terminal housing chambers 2 arranged in parallel in the insulating housing 1.
a, 3a, and a through hole 6 communicating with each terminal accommodation chamber 2 is provided in the outer peripheral wall 1a of the insulating housing 1. In a connector in which the side surface of the plate-shaped insertion pin 8 inserted in the terminal 3 is engaged with the terminal 3 to prevent the insertion pin 8 from coming off, a plurality of the insertion pins 8 are inserted into the connecting plate 13 with comb teeth. The chain body and the insulating housing 1
A lock mechanism (lock portion 7, main lock piece 9, temporary lock piece 10) is provided between the insertion pin 8 and
A flexible locking arm 11 that is elastically displaceable up and down and engages with the terminal 3 is provided on the side surface of the terminal 3, and the flexible locking arm 11 is connected to the second locking portion 5 of the terminal 3.
The terminal 3 is engaged with the terminal 3 and presses the electrical contact portion 4 of the terminal 3, thereby simultaneously preventing the terminal 3 from slipping out and wobbling.

In FIG. 1, 3' has a cylindrical electrical contact part 4 for receiving a mating tab, similar to the terminal 3;
They are female terminals of different sizes, and locking pieces 5 as second locking portions are integrally cut and raised from the bottom wall on both rear sides of the electrical contact portions 4 of each terminal 3, 3'. ing. Dual terminal receiving chambers 2, 2' are formed in the insulating housing 1 to accommodate different types of terminals 3, 3', and the connector A is formed as a male composite connector. A flexible locking arm 2a integrally protrudes from the bottom wall of each terminal storage chamber 2, 2' and a first locking portion provided on the bottom wall of the electrical contact portion 4 of the terminal 3, 3'. The locking hole 3a constitutes locking means 2a, 3a between the two.

Further, a recess 12 is formed in the outer peripheral wall 1a of the insulating housing 1, and the through hole 6 is provided in the bottom wall 12a of the recess 12, and the hole edge 6 of each through hole
Facing A, the lock portion 7 extends from the side wall 12b of the recess 12 in a direction perpendicular to the axial direction of the terminal storage chambers 2, 2', and is formed to be flexible so as to be elastically displaced up and down. .

The insertion pin 8 is plate-shaped, and its head is connected to the connecting plate 1 in correspondence with the terminal housing chambers 2 and 2' arranged in parallel.
It is formed as a chain linked by 3. The head of each insertion pin 8, in the illustrated example the connecting plate 1
A main lock piece 9 that engages with the lock part 7 is provided integrally with the main lock piece 9, and a hole edge 6a is provided below the main lock piece 9.
A temporary locking piece 10 that engages with is provided protrudingly, and
The locking piece 5 of the terminal 3 is attached to the side wall of the insertion pin 8.
Flexible locking arms 11 that engage with the terminals are provided in multiple stages corresponding to each terminal receiving chamber 2, 2'. As shown in FIGS. 1 and 2, this locking arm 11 preferably has a protrusion 11a formed at the lower part of its free end.

The locking portion 7 of the insulating housing 1 and the permanent locking piece 9 and temporary locking piece 10 of the insertion pin 8 constitute a two-stage locking mechanism between the insulating housing and the insertion pin.

In the above, connect connector A to female terminals 3 and 3'.
Although an example has been described in which the connector is configured as a male connector that accommodates a male terminal, the same applies to a female connector that accommodates a male terminal. In addition, the lock part 7
At least one of the main lock piece 9 and the main lock piece 9 is formed to be flexible, and the temporary lock piece 10 is formed as a small locking pawl or a short flexible pin as shown in the figure. In addition, the electrical contact part 4 of the terminal 3
The locking piece 5 may be omitted and the flexible locking arm 11 may be directly engaged with the rear shoulder of the electrical contact portion 4.

[Effect]

According to the present invention, as shown in FIGS. 2 and 3, when the insertion pin 8 is inserted into the through hole 6, the main lock piece 9 comes into contact with the lock part 7 and bends the lock part 7 slightly downward. At the same time, the temporary locking piece 10 is attached to the hole edge 6a (in the illustrated example, the hole edge 6a) of the terminal storage chamber 2.
The insertion pin 8 is engaged with the back surface 5 of the lock portion 7 facing the direction a, and the insertion pin 8 is temporarily locked.

When the insertion pin 8 is in the temporary locking position as described above, the locking arm 11 is locked in the terminal housing chamber 2,
Since the terminals 3 and 3' are located apart from the inside of the terminal 2', the terminals 3 and 3' can be freely inserted and removed.

Next, after the terminal 3 is completely inserted and first locked by the locking means 2a and 3a, as shown in FIGS. 4 and 5, when the insertion pin 8 is pushed in again, the main lock piece 9 is released. The lock portion 7 is further pressed and bent, and the insertion pin 8 finally gets over this and enters between the lock portion 7 and the bottom wall 12a of the recess 12, and the insertion pin 8 is fully locked.

In this main lock position, the locking arm 11 descends and protrudes into the terminal housing chamber 2, and is located at the back of the locking piece 5, which is the second locking portion of the terminal 3.
It will be in a state of engagement with this. Therefore, the terminal 3 is prevented from coming off, and the locking means 2a, 3
In conjunction with a, double retention is achieved. At the same time, the protrusion 11a at the free end of the locking arm 11 elastically contacts the bottom surface of the electrical contact section 4 and presses it against the inner wall of the terminal housing chamber 2, so that the terminal 3 is also prevented from wobbling.

Effects of the Invention As explained above, the present invention provides locking means between each terminal and a plurality of terminal accommodation chambers arranged in parallel in an insulating housing, and also provides locking means for each terminal accommodation chamber on the outer peripheral wall of the insulating housing. A through hole communicating with the terminal is provided, and the side surface of a plate-shaped insertion pin inserted through the through hole so as to be perpendicular to the axial direction of the terminal and located on at least one side of the terminal is engaged with the terminal to prevent the terminal from coming off. In this connector, the insertion pins are formed as a chain in which a plurality of the insertion pins hang down from the connecting plate in a comb-like shape, and a locking mechanism is provided between the insertion pins and the insulating housing, and a locking mechanism is provided between the insertion pins and the insulation housing. A flexible locking arm that engages with the terminal and can be elastically displaced up and down is provided on the side surface, and the flexible locking arm engages with the second locking part of the terminal and also connects the electrical contact part of the terminal. The terminal is pressed to prevent the terminal from slipping out and wobbling at the same time, and the insertion pin is temporarily locked into the insulating housing while allowing the terminal to be inserted into and removed from the terminal housing chamber. This prevents the occurrence of defective products due to forgetting to attach the insertion pin after inserting the terminal, improves connector assembly work, and halves the labor involved in inventory management. Furthermore, when the insertion pin is fully locked, its flexible locking arm presses the terminal against the inner wall of the terminal housing chamber, thereby doubly preventing the terminal from slipping out and wobbling.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the connector of the present invention, FIG. 2 is a cross-sectional view of the insertion pin in the above connector in a temporarily locked state, and FIG. 3 is a cutaway perspective view of the main part of FIG. 4 is a cross-sectional view of the insertion pin in the above connector in a fully locked state, and FIG. 5 is a cutaway perspective view of the main part of FIG. 4. A... Connector, 1... Insulating housing, 2...
...Terminal accommodation room, 3...Terminal, 2a...
...Locking arm, 3a...Latching hole (locking means), 4
...Electrical contact portion, 5...Locking piece, 6...Through hole,
7... Lock portion, 8... Insertion pin, 9... Main lock piece, 10... Temporary lock piece, 11... (flexible)
Locking arm.

Claims (1)

[Claims] 1. A locking means is provided between each terminal and a plurality of terminal accommodating chambers arranged in parallel in the insulating housing, and a through hole communicating with each terminal accommodating chamber is provided in the outer peripheral wall of the insulating housing, and In the connector, the side surface of a plate-shaped insertion pin inserted perpendicular to the axial direction of the terminal and located on at least one side of the terminal is engaged with the terminal to prevent the terminal from coming off in a double manner. The insertion pin is formed as a chain body in which a plurality of pins hang down from the connecting plate in a comb-like shape, and a locking mechanism is provided between the chain body and the insulating housing, and a vertically elastic displacement mechanism is provided on the side surface of the insertion pin to engage with the terminal. A flexible locking arm is provided, and the flexible locking arm engages with the second locking portion of the terminal and presses the electrical contact portion of the terminal to simultaneously prevent the terminal from slipping out and wobbling. A connector characterized in that it can be used.