EP0533970B1 - Lock mechanism of inner lock type for electrical connector - Google Patents
Lock mechanism of inner lock type for electrical connector Download PDFInfo
- Publication number
- EP0533970B1 EP0533970B1 EP91116262A EP91116262A EP0533970B1 EP 0533970 B1 EP0533970 B1 EP 0533970B1 EP 91116262 A EP91116262 A EP 91116262A EP 91116262 A EP91116262 A EP 91116262A EP 0533970 B1 EP0533970 B1 EP 0533970B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lock
- connector
- pair
- plug
- socket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/627—Snap or like fastening
- H01R13/6271—Latching means integral with the housing
- H01R13/6273—Latching means integral with the housing comprising two latching arms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
- H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
Definitions
- the present invention relates generally to electrical connectors to be connected to ribbon or flat cables and, more particularly, to a lock mechanism for such electrical connectors.
- Fig. 12 shows a conventional electrical connector of this type.
- a connector plug c is connected and locked to a connector socket a by engaging a lock arm f of the plug c with a lock shoulder e of the socket a so that the pin receiving apertures b of the connector socket a receive the contact pins g of the connector plug c for providing electrical continuation.
- a lock mechanism according to the preamble of claim 1 is known from US-A-4 458 073.
- the lock arms are depressed with two fingers to put them into the lock arm receiving recesses, thereby reducing the width of the connector plug, resulting in a reduced connector size.
- the lock arms are inserted into the lock recesses without resistance and, when released, flex outwardly so that the lock projects engage the lock shoulders to lock the connector plug to the connector socket. Since the lock mechanism is of the inner lock type in which the lock projections engage the lock shoulders within the lock recesses, it is resistant to vibrations.
- the front portions of the lock arms project through the cutouts of the connector socket while the sloped surfaces of connector socket provides indentations sufficiently large to receive the fingers. consequently, when the lock arms are depressed, the fingers rest in the indentations and engage the end projections of the connector socket so that it is easy to pull the connector plug out of the connector socket.
- an electrical connector consists of a connector socket 1 which is to be mounted on a board and a connector plug 2 which is to be connected to the connector socket 1.
- the connector socket 1 includes a socket block 3 made from a synthetic resin so as to have a plug cavity 4 which opens in the front end 3a.
- a number of terminals 5 are arranged at regular intervals lengthwise of the plug cavity 4.
- the contact portion 6 of each terminal 5 projects into the plug cavity 4 from the terminal support portion 4a of the socket block 3.
- the leg portion 7 of each terminal 5 projects outwardly from the rear wall 3d of the socket block 3 and is bent downwardly at right angles.
- a pair of lock recesses 8 each having a pair of lock shoulders 9 and 10 are formed on opposite side walls 3b and 3c of the socket block 3.
- Each side wall has a central cutout 11 in the front portion and a sloped surface 12.
- the connector plug 2 includes a plug block 13 which is molded from a synthetic resin so as to have a pair of lock mechanisms 14 on opposites sides 13a.
- the lock mechanism 14 has a lock arm 15 which extends backwardly from the front end of the block side 13a.
- the lock arm 15 has a base portion 15a which extends parallel with the axis 88 and a front portion 15b which extends outwardly with respect to the axis 88.
- the front portion 15b is made thicker than the base portion 15a and is knurled on the outside 16 for preventing the finger from slipping.
- a pair of lock projections 18 and 19 are formed on opposite sides of the base portion 15a.
- a pair of lock arm receiving recesses 20 are formed on the side walls 13a (Fig. 11) for receiving the front portions 15b of the lock arms 15.
- a pair of end projections 21 project outwardly from the rear end of the plug block 13 providing the lock arm receiving recesses 20 with an end wall.
- a number of contact terminals 22 are arranged at regular intervals lengthwise of the plug block 13 and connected to a flat cable 23.
- the connector socket 1 is mounted on a board 24 by soldering the leg portions 6 of the terminals 5 to the through holes 25.
- the connector plug 2 is fitted into the plug cavity 4 of the connector socket 1 so that the contact terminals 22 are brought into contact with the contact portions 6 of the terminals 5 for providing electrical continuity.
- the lock arms 15 of the lock mechanisms 14 are depressed with two fingers to put them in the lock arm receiving recesses 20 so that the lock arms 15 are inserted into the lock recesses 8 without resistance. After insertion, the fingers are removed to release the lock arms 15 so that they flex outwardly with their own elasticity. Consequently, the lock projections 18 and 19 engage the lock shoulders 9 and 10 to lock the connector plug 2 to the connector socket 1.
- the front portions 15b of the lock arms 15 are depressed with two fingers to put them in the lock arm receiving recesses 20, thereby releasing the lock projections 18 and 19 from the lock shoulders 9 and 10 for removal of the connector plug 2 from the connector socket 1.
- the fingers rest in the indentations of the sloped surfaces 12 of the connector socket 1 coming into contact with the end projections 21. This makes it easy to pull the connector plug 2 out of the connector socket 1.
- the electrical connector according to the invention it is possible to reduce the width of the connector plug 2, thus minimizing the size of the electrical connector. Since the lock arms 15 are depressed into the receiving recesses 20 before locking, it is possible to insert the lock arms 15 into the lock recesses 8 without resistance. When released, the lock arms 15 flex outwardly so that the lock projections 18 and 19 of the lock arms 15 engage the lock shoulders 9 and 10 of the connector socket 1 to lock the connector plug 2 to the connector socket 1.
- This lock mechanism of the inner lock type in which the lock arms 15 engage within the lock recesses 20 is resistant to vibrations.
- the front portions of the lock arms 15 project through the cutouts 11 of the connector socket 1 while the sloped surfaces 12 provide indentations which are sufficiently large to receive the fingers.
- the fingers rest in the indentations of the sloped surfaces 12 of the connector socket 1 so that they engage the end projections 21 of the plug connector 2 without difficulty.
Description
- The present invention relates generally to electrical connectors to be connected to ribbon or flat cables and, more particularly, to a lock mechanism for such electrical connectors.
- Fig. 12 shows a conventional electrical connector of this type. A connector plug c is connected and locked to a connector socket a by engaging a lock arm f of the plug c with a lock shoulder e of the socket a so that the pin receiving apertures b of the connector socket a receive the contact pins g of the connector plug c for providing electrical continuation.
- In the conventional electrical connector, however, the lock arms f project outwardly, increasing the size of the connector plug c. In addition, this lock mechanism d of the outer lock type in which the lock arms f engage the lock shoulders e of the socket a is not only very sensitive to vibrations but also very difficult to release in limited spaces.
- A lock mechanism according to the preamble of
claim 1 is known from US-A-4 458 073. - Accordingly, it is an object of the invention to provide a compact electrical connector.
- It is another object of the invention to provide a lock mechanism for an electrical connector of the inner lock type which is not only resistant to vibrations but also easy to release in limited spaces.
- According to the invention there is provided a lock mechanism as defined in
claim 1. - To connect a connector plug to a connector socket, the lock arms are depressed with two fingers to put them into the lock arm receiving recesses, thereby reducing the width of the connector plug, resulting in a reduced connector size. The lock arms are inserted into the lock recesses without resistance and, when released, flex outwardly so that the lock projects engage the lock shoulders to lock the connector plug to the connector socket. Since the lock mechanism is of the inner lock type in which the lock projections engage the lock shoulders within the lock recesses, it is resistant to vibrations.
- When the connector plug is connected to the connector socket, the front portions of the lock arms project through the cutouts of the connector socket while the sloped surfaces of connector socket provides indentations sufficiently large to receive the fingers. consequently, when the lock arms are depressed, the fingers rest in the indentations and engage the end projections of the connector socket so that it is easy to pull the connector plug out of the connector socket.
- The above and other objects, features, and advantages of the invention will more apparent from the following description when taken in conjunction with the accompanying drawings.
-
- Fig. 1 is a top plan view of an electrical connector according to an embodiment of the invention of which the connector plug and the connector socket are unplugged;
- Fig. 2 is a front elevational view of the connector socket;
- Fig. 3 is a top plan view of the connector socket;
- Fig. 4 is a side elevational view of the connector socket;
- Fig. 5 is a sectional view taken along line 5-5 of Fig. 2;
- Fig. 6 is a front elevational view of the connector plug;
- Fig. 7 is a top plan view of the connector plug;
- Fig. 8 is a bottom plan view of the connector plug;
- Fig. 9 is a rear elevational view of the connector plug;
- Fig. 10 is a side elevational view of the connector plug;
- Fig. 11 is a sectional view taken along line 11-11 of Fig. 6; and
- Fig. 12 is a exploded perspective view of a conventional electrical connector.
- In Fig. 1, an electrical connector consists of a
connector socket 1 which is to be mounted on a board and aconnector plug 2 which is to be connected to theconnector socket 1. - In Figs. 2-5, the
connector socket 1 includes asocket block 3 made from a synthetic resin so as to have a plug cavity 4 which opens in thefront end 3a. A number ofterminals 5 are arranged at regular intervals lengthwise of the plug cavity 4. Thecontact portion 6 of eachterminal 5 projects into the plug cavity 4 from theterminal support portion 4a of thesocket block 3. Theleg portion 7 of eachterminal 5 projects outwardly from therear wall 3d of thesocket block 3 and is bent downwardly at right angles. A pair oflock recesses 8 each having a pair oflock shoulders opposite side walls socket block 3. Each side wall has acentral cutout 11 in the front portion and asloped surface 12. - In Figs. 6-11, the
connector plug 2 includes aplug block 13 which is molded from a synthetic resin so as to have a pair oflock mechanisms 14 onopposites sides 13a. Thelock mechanism 14 has alock arm 15 which extends backwardly from the front end of theblock side 13a. Thelock arm 15 has abase portion 15a which extends parallel with theaxis 88 and afront portion 15b which extends outwardly with respect to theaxis 88. Thefront portion 15b is made thicker than thebase portion 15a and is knurled on the outside 16 for preventing the finger from slipping. A pair oflock projections base portion 15a. A pair of lock arm receivingrecesses 20 are formed on theside walls 13a (Fig. 11) for receiving thefront portions 15b of thelock arms 15. A pair ofend projections 21 project outwardly from the rear end of theplug block 13 providing the lock arm receivingrecesses 20 with an end wall. A number ofcontact terminals 22 are arranged at regular intervals lengthwise of theplug block 13 and connected to aflat cable 23. - Best shown in Fig. 5, the
connector socket 1 is mounted on aboard 24 by soldering theleg portions 6 of theterminals 5 to the throughholes 25. Theconnector plug 2 is fitted into the plug cavity 4 of theconnector socket 1 so that thecontact terminals 22 are brought into contact with thecontact portions 6 of theterminals 5 for providing electrical continuity. - Before the
connector plug 2 is inserted into the connector cavity 4, thelock arms 15 of thelock mechanisms 14 are depressed with two fingers to put them in the lock arm receivingrecesses 20 so that thelock arms 15 are inserted into thelock recesses 8 without resistance. After insertion, the fingers are removed to release thelock arms 15 so that they flex outwardly with their own elasticity. Consequently, thelock projections lock shoulders connector plug 2 to theconnector socket 1. - When the
connector plug 2 is connected to theconnector socket 1, thefront portions 15b of thelock arms 15 are protruded through thecutouts 11 of theconnector socket 1, and thesloped surfaces 12 provide indentations sufficiently large to put the fingers therein. - To disconnect the
connector plug 2 from theconnector socket 1, thefront portions 15b of thelock arms 15 are depressed with two fingers to put them in the lock arm receivingrecesses 20, thereby releasing thelock projections lock shoulders connector plug 2 from theconnector socket 1. When thefront portions 15b are depressed with the fingers, the fingers rest in the indentations of thesloped surfaces 12 of theconnector socket 1 coming into contact with theend projections 21. This makes it easy to pull theconnector plug 2 out of theconnector socket 1. - As has been described above, with the electrical connector according to the invention, it is possible to reduce the width of the
connector plug 2, thus minimizing the size of the electrical connector. Since thelock arms 15 are depressed into thereceiving recesses 20 before locking, it is possible to insert thelock arms 15 into thelock recesses 8 without resistance. When released, thelock arms 15 flex outwardly so that thelock projections lock arms 15 engage thelock shoulders connector socket 1 to lock theconnector plug 2 to theconnector socket 1. This lock mechanism of the inner lock type in which thelock arms 15 engage within thelock recesses 20 is resistant to vibrations. - When the
connector plug 2 is connected to theconnector socket 1, the front portions of thelock arms 15 project through thecutouts 11 of theconnector socket 1 while thesloped surfaces 12 provide indentations which are sufficiently large to receive the fingers. Thus, it is easy to pull the connector plug 2 out of theconnector socket 1 because when thelock arms 15 are depressed, the fingers rest in the indentations of thesloped surfaces 12 of theconnector socket 1 so that they engage theend projections 21 of theplug connector 2 without difficulty.
Claims (3)
- A lock mechanism of an inner lock type for an electrical connector which consists of a connector socket (1) having a rectangular socket block (3) and a connector plug (2) having a rectangular plug block (13), said lock mechanism comprising a pair of inner lock recesses (8) formed in opposite side walls (3b, 3c) of said socket block (3) and each provided with lock shoulder means (9, 10) in a front portion thereof, a pair of flexible lock arms (15) provided on said plug block (13), each of said pair of lock arms having a base portion (15a) extending backwardly from the front end of said plug block (13) and a front portion (15b) extending backwardly and outwardly from said base portion (15a), a lock projection means (18, 19) being provided on said base portion (15a) of each of said pair of lock arms (15) and adapted to engage with said lock shoulder means (9), characterized by said lock shoulder means being a pair of lock shoulders (9, 10) and said lock projections means being a pair of lock projections (18, 19), by a pair of lock arm receiving recesses (20) provided in opposite side walls of said plug block (13), said front portion (15b) of each of said pair of lock arms (15) being received in a corresponding one of said lock arm receiving recesses (20) when said lock arms are depressed for inserting the connector plug into the connector socket, and by a central cutout (11) formed between said pair of lock shoulders (9, 10) in the front end of each of said opposite side walls (3b, 3c) of said socket block (3), said front portion (15b) of each said pair of lock arms (15) being received in the corresponding cutout (11) when the depression of the lock arms is released to have the lock arms flex outwardly when the lock projections (18, 19) engage the lock shoulders (9, 10) to connect the connector plug to the connector socket.
- A lock mechanism according to claim 1, characterized by a sloped surface (12) provided in the front portion of each of said side walls (3a, 3c) of said socket block (3).
- A lock mechanism according to claim 1 or 2, characterized by a pair of end projections (21) each extending outwardly from the rear end of said plug block (13) and respectively forming an end wall of each of said pair of lock arm receiving recesses (20).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91116262A EP0533970B1 (en) | 1991-09-24 | 1991-09-24 | Lock mechanism of inner lock type for electrical connector |
DE69128351T DE69128351T2 (en) | 1991-09-24 | 1991-09-24 | Locking mechanism with internal locking for electrical connectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91116262A EP0533970B1 (en) | 1991-09-24 | 1991-09-24 | Lock mechanism of inner lock type for electrical connector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0533970A1 EP0533970A1 (en) | 1993-03-31 |
EP0533970B1 true EP0533970B1 (en) | 1997-12-03 |
Family
ID=8207186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91116262A Expired - Lifetime EP0533970B1 (en) | 1991-09-24 | 1991-09-24 | Lock mechanism of inner lock type for electrical connector |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0533970B1 (en) |
DE (1) | DE69128351T2 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5633107Y2 (en) * | 1975-10-13 | 1981-08-06 | ||
JPS5726304Y2 (en) * | 1978-03-30 | 1982-06-08 | ||
US4458973A (en) * | 1983-01-28 | 1984-07-10 | Amp Incorporated | Connector assembly having improved internal latching system |
US4681386A (en) * | 1986-01-22 | 1987-07-21 | Lance Wire And Cable, Inc. | Integral connector having plastic spring-clips |
-
1991
- 1991-09-24 DE DE69128351T patent/DE69128351T2/en not_active Expired - Fee Related
- 1991-09-24 EP EP91116262A patent/EP0533970B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0533970A1 (en) | 1993-03-31 |
DE69128351T2 (en) | 1998-07-16 |
DE69128351D1 (en) | 1998-01-15 |
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