JPH0441582Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a small round connector with a lock that locks the connected state when connected to a mating connector.

``Prior Art'' Conventional so-called mini-DIN type small round connectors were not provided with a locking mechanism. For this reason, the bonded state could come loose due to slight tension or vibration. Conventional locking devices have the disadvantage of being relatively large and their mechanisms are also relatively complex. Furthermore, the conventional one is from 1987-
As shown in 17995 "Connector with locking mechanism", measures against leakage and intrusion of electromagnetic noise were not sufficient.

"Means for solving the problem" In this invention, a synthetic resin body with a contact pin incorporated is held within a cylindrical metal cover, and a U-shaped groove is formed in the front part of the metal cover. The tongue piece is integrally constructed with a locking projection protruding outward from the front end of the tongue piece.
On the inner peripheral surface of the cover, an elastic piece made of an elastic resin material is arranged on the tongue piece so as to be slidable back and forth, and a driving part is integrally connected to the rear end of the elastic piece, and the driving part projects from the metal cover. There is. The rear end of the metal cover is closed with a metal shell, and a coil spring is interposed between the shell and the drive unit to bias the elastic piece forward. A resin bushing is mounted on the shell, and the bushing protects the cable led out. A cylindrical release body is disposed over the bush, the shell and the cover, and the release body is engaged with the drive part so as to be able to move the elastic piece rearward.

"Embodiment" FIG. 1 shows an embodiment of this invention, and FIG. 2 shows an exploded perspective view of a part thereof. A plurality of contact pins 12 are incorporated into the body 11 made of synthetic resin,
Contact pin 12 protrudes from the front surface of body 11. The body 11 is held within a cylindrical metal cover 13, a U-shaped groove 14 is formed in the front part of the metal cover 13, and a tongue piece 15 is formed integrally with the cover 13. The rear end of the tongue piece 15 is connected to the cover 13
is connected to. A locking protrusion 16 projects outward from the front end of the tongue piece 15.

An elastic piece 17 made of an elastic resin material is disposed so as to be in contact with the inner surface of the tongue piece 15 and can be slid back and forth. A vertical groove 18 is formed in the body 11 in correspondence with the position of the elastic piece 17. An elastic piece 17 is located inside. A driving part 19 is integrally formed at the rear end of the elastic piece 17, and the driving part 19 protrudes to the outside of the metal cover 13 through a hole 21 formed in the metal cover 13. The driving part 19 has a semi-ring shape. The metal cover 13 is disposed along the outer circumferential surface of the metal cover 13. The front end of the elastic piece 17 is substantially aligned with the front end of the tongue piece 15.

The rear end of the metal cover 13 is a metal shell 22
is covered and closed, and the shell 22 is covered with the metal cover 1.
It is fixed at 3. A coil spring 23 is interposed between the shell 22 and the drive unit 19 on the metal cover 13, and the elastic piece 17 is biased forward. A front end flange 22a of the shell 22 is formed, and the flange 22a serves as a cradle for the coil spring 23.
A resin bushing 24 is integrally molded over the shell 22. Cable 25 through bush 24
is led out to the outside, and the cable 25 is protected. The leads 26 of the cable 25 are each connected to the rear end of a corresponding one of the contact pins 12. A ferrule 27 is inserted over the inner end of the cable 25. The shield wire 30 of the cable 25 is folded back and placed over the ferrule 27, and the rear end of the shell 22 is caulked onto the ferrule 27 to clamp the cable 25. ciel 2
The outer diameter of the rear end of the ring-shaped protrusion 22 is increased.
b is formed, and the ring-shaped protrusion 22b prevents the bush 24 from coming off. This ring-shaped protrusion 2
2b is the shell 22 when clamping the cable 25.
This can be obtained automatically by not caulking the rearmost end of the

A cylindrical release body 28 made of a resin material is covered on the metal cover 13, and the inner surface stepped portion 29 of the release body 28 engages with the front surface of the drive unit 19, and a claw formed on the inner surface of the rear end of the release body 28 31 engages with the front surface of the recess 32 of the bush 24 to prevent the release body 28 from coming off. Further, when the release body 28 is pulled rearward, the elastic piece 17 moves rearward against the biasing force of the coil spring 23.

Note that protrusions 33 extending back and forth are formed on the inner circumferential surface of the front end of the metal cover 13, and regulating grooves are formed in the mating connector in correspondence with these protrusions 33, so that mutual positioning is achieved.

According to the connector of this invention having the above-mentioned configuration,
When this connector is inserted into a mating connector, the protrusion 33 positions it with the mating connector, and the tongue piece 15 and the elastic piece 17 try to be inserted into one of the regulating grooves (of the mating connector). At this time, the front end of the elastic piece 17 abuts against the front surface of the body of the mating connector and is pulled down relatively backward, so that the locking protrusion 16 is biased inward by the shell of the mating connector and inserted into the mating connector. be done. When the locking protrusion 16 is inserted deep enough into the mating connector, the locking protrusion 16 enters the recess of the mating connector and moves outward, and the elastic piece 17 protrudes forward by the coil spring 22 and locks the mating connector. The locked state in which the protrusion 16 is inserted into and engaged with the recess is maintained.

To release this locked state, pull the release body 28 backwards and pull the elastic piece 17 backwards, and the locking projections 16 will be able to deviate inward, allowing the entire connector to be pulled away from the mating connector. The locking protrusion 16 can be easily removed from the recess of the mating connector, allowing the connectors to be uncoupled from each other.

"Effects of the invention" As stated above, according to this invention, since the groove for regulating the position when mating is used in the conventional non-lock type connector, it can be used not only for electrical connections but also for
A locking mechanism can be provided without changing the overall size of the connector, that is, it can be configured to be compact. Therefore, the conventional non-locking type connector and the locking connector of this invention can be fitted together.

Further, as is clear from the above example, since the inside is almost covered with metal parts, there is no risk of noise being radiated from the inside to the outside, and conversely, it is less susceptible to the influence of external noise.

It is conceivable to use a resin cap as a stopper behind the coil spring 23, but in that case the number of parts would increase. However, when the flange 22a is formed on the shell 22 as in the embodiment described above, a stopper for the coil spring 23 can be obtained without providing any special parts. Since the shell 22 is made by drawing a rolled material, the flange 22a can be easily formed.

A ring-shaped protrusion 22b is formed at the rear end of the shell 22 to prevent the bush 24 from coming off.
This can be automatically obtained by not caulking the rearmost end of the shell 22 when crimping it onto the ferrule 27.

[Brief explanation of drawings]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is a partially exploded perspective view.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A body made of a synthetic resin material into which a contact pin is incorporated; The tongue pieces are integrally connected at the rear by a U-shaped groove extending in the front-rear direction, and a locking protrusion protrudes outward from the front free end of the tongue piece behind the positioning protrusion. The metal cover is made of an elastic resin material, which is integrally formed with a cylindrical metal cover that is in contact with the tongue piece on the inner surface thereof, can slide back and forth, and has a driving part protruding from the metal cover at the rear end. an elastic piece, a metal shell that closes a rear end of the metal cover, a coil spring provided on the metal cover and interposed between the drive unit and the metal shell, and a coil spring fixed on the metal shell. , a resin bushing that protects the cable led out to the outside, and a cylindrical release body that covers the bushing, the shell, and the cover and can engage with the drive unit to move the elastic piece rearward. A connector with a lock. (2) The connector with a lock according to claim 1, wherein a flange is integrally formed at the front end of the metal shell, and the rear end of the coil spring is received by the flange. (3) A connector with a lock according to claim 1, wherein a ring-shaped protrusion is formed at the rear end of the metal shell, and the ring-shaped protrusion prevents the bush from coming off.