JPS5939867B2 - circular plug connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a housing generally in the shape of a hollow cylinder and a connector member removably inserted into one side of the housing, the connector member having at least one contact member inserted therein. The present invention relates to a circular plug connector comprising a contact adapter and a packing box having a sealing ring and a thrust member and attached to the other side of the housing.

Plug connectors generally prevent both axial and rotational movement of the cable after the cable lead wire is connected to the contact member, and do not break the electrical connection caused by external forces acting on the cable. You need to be careful.

The prior art has used cable attachment means to solve this problem. The so-called Stutkin box
ting-BOx) is a commonly used cable attachment means for circular plug connectors. In the case of this packing box, a sealing ring made of a soft elastic material is crimped onto the cable enclosing member by a thrust member, and the thrust member is screwed in the axial direction of the housing, so that the cable can be held in place by the sealing ring. Configure. Cable screwing means suitably arranged on the housing to clamp the cable to the housing are known.

See US Pat. No. 3,856,376 regarding this configuration. This patent discloses a cable clamp used to clamp a cable between housing halves. A prior art circular plug connector with a sealing box has a housing into which a contact adapter is screwed into one end and a packing box is attached to the other end. At this time, be careful not to tighten the packing box yet and tighten the packing box after screwing in. If you assemble in the reverse order, that is, first tighten the packing box. If tightened, the electrical connection will be compromised when screwing the connector member, since the part of the cable located inside the housing will rotate due to the screwing action. When separating the connector, perform the reverse operation. However,
With conventional plug connectors of this type, even when assembled and disassembled in the proper order, there is a risk that the contact adapter will loosen and rotate relative to the housing during use of the connector. This results in an interruption of the electrical connection. Plug connectors that house a cable clamp rigidly coupled to a contact adapter inside the housing do not suffer from the above-mentioned problems, but prior art plug connectors of this type have a complex design or are difficult to assemble. . It is therefore an object of the invention to provide a circular plug connector with a simple design and reliable cable attachment means.

According to the present invention, a mounting disk is disposed between the sealing ring and the housing of the portion that supports the sealing ring in the axial direction, and the mounting disk is provided with a protruding lug that projects in the axial direction, and the protruding lug is connected to the connector member. The problem is solved by fitting into a corresponding recess in the opposite end of the sealing ring.

A feature of the plug-type connector according to the invention or of the cable attachment means accommodated in this connector is that a mounting disk, which can be engaged in a non-rotatable manner with respect to the connector member, is interposed between the sealing ring of the packing box and the connector member. In particular, relative rotation between the sealing ring and the connector member is prevented. This form has two advantages. That is, when the housing is closed with a packing box,
The advantage is that the connector element is rigidly connected to the sealing ring of the packing box via the mounting disc, and that the sealing ring of the packing box frictionally engages the housing so that the connector element cannot be twisted. This means that the connectors can only be separated according to the correct order. Another important advantage is that the connector member cannot rotate when the packing box is tightened. The torque acting on the connector member is transmitted via the mounting disk to the sealing ring of the packing box. However, once the sealing box has been tightened, the sealing ring can no longer be rotated. The above-mentioned problem can also be solved by forming a cable clamp in which two shell halves are screwed together.

Each of the shell halves is provided with an axially projecting support arm having a locking shoulder disposed at the distal end of the projecting arm and each fitting a locking shoulder at a diametrically opposed position on the outer periphery of the contact adapter. A shaped recess is provided in which the locking shoulder engages, and a radial stop is provided in which the support arm can engage. US Patent No. 3
Cable clamps are known which are mounted on the housing of a plug connector as described above in connection with No. 856,376. The cable clamping means disclosed in the above-mentioned US patent is difficult to assemble. This is because the component performing the cable clamping can only be delivered to its final position when the two halves of the housing are assembled.
In this position the cable clamping means can no longer be operated from the outside. The assembly of plug connectors of the type described above therefore requires considerable skill. Furthermore, cable clamps of this type cannot be used with single-piece housings. In contrast to known plug connectors, the connector according to the invention has the advantageous feature of a cable clamping means which can be used even with a one-piece housing, in particular a circular plug connector with a one-piece housing. It is suitable for use in This assembly is extremely simple. The two shell halves are simply screwed together to clamp the cable and the support arm of the cable clamp is snapped into a recess located on the contact adapter.

In this way, the electrical connection between the lead wire and the contact member can be sufficiently protected from mechanical loads acting on the cable. A packing box is additionally provided for this plug connector, but it is not necessary to use it. It is common to use a packing box because it is a simple means of sealing off the housing. Furthermore, in addition to the cable clamp, a packing box also protects the cable from tensile and rotational loads. A packing box of this type is an additional means for attaching the cables, but it is not necessary to use the above-mentioned packing boxes with mounting disks. When using a packing box with a mounting disc, the mounting disc can protect the contact adapter from rotation, in which case it is formed at the end opposite to the supporting arm of the cable clamp connected to the contact adapter in a non-rotational manner. Insert the prongs of the mounting disk into the recesses. As mentioned above, the contact adapter is securely coupled to the housing in a relatively non-rotatable manner by means of a mounting disk recessed into a sealing ring which is frictionally coupled to the housing by screwing the thrust member of the packing box to the housing. Two variants have been proposed to ensure a relatively non-rotatable connection, which can be used individually or in combination. In one variation, the housing is provided with radially inward projections that extend into the gaps between the ears of the mounting disk to prevent rotation of the mounting disk relative to the housing. Another variant for non-rotatable mounting is to provide a step-like projection on the side of the mounting disk facing the sealing ring, which step-like projection is inserted into the sealing ring.
Another preferred embodiment of the cable clamp provides diametrically opposed, radially inwardly projecting clamp jaws that are located inside the shell halves. A radial recess is formed between the clamp jaws on the inner surface of the shell halves, and a clamp jaw insertion member is removably fitted into the radial recess. The radial height of the clamp jaw insert is such that the clamp jaw insert projects into the space between two opposing clamp jaws.
That is, the inner diameter produced by the clamp jaw insert is smaller than the inner diameter produced by the clamp jaw. In this way, a cable clamp insert is used when the cable has a small diameter, and is not needed when a cable with a large diameter is to be connected. The invention will be explained with reference to the drawings. The circular plug connector shown in the drawings is provided with a contact adapter 1 that surrounds several contact chambers, and a contact member 2 is accommodated in each contact chamber. A contact adapter accommodating the contact member constitutes one connector member and is connected to the other connector member, for example on the instrument side. The end of the contact member protruding from the contact adapter 1 is shown in FIG. The contact member 2 is a jack type (female type) contact or a plug type (male type) contact. A female contact is inserted into the contact chamber of the preferred embodiment. At this time, it can be inserted into the male contact through the opening 3 on the front side of the contact adapter. As shown in FIG. 2, a clamp terminal or a soldering terminal is supported at the rear end of the contact member 2. These terminals are connected to the individual leads 4 of the cable 5. A radial flange 6 is provided approximately at the center of the contact adapter 1 in the axial direction. An external thread 7 is formed in the rearward continuous portion of the contact adapter 1 beyond this radial flange 6. A housing 9, which has a substantially hollow cylinder shape and is provided with an internal thread 8, is screwed onto the external thread 7.
A radial groove 10 supporting an O-ring 11 is provided at a predetermined position behind the radial flange on the side opposite to the contact adapter;
The housing 9 is sealed. The coupling ring 12 is attached by being pushed into the contact adapter 1 from the front side of the contact adapter 1. The coupling ring has a radial groove on its inner surface into which the spring ring 13 is snapped. Coupling ring 1
In the second axial movement, the spring ring 13 stops at the radial flange 6, allowing a "secure" attachment of the coupling ring 12 to the contact adapter 1. The cable clamp 15 is constituted by two shell halves 14 and is arranged within the housing 9.

The two shell halves are provided with axially projecting support arms 16, each end of which supports a locking shoulder.

The support arm 16 together with the locking shoulder 17 enters a recess 19, which recess 19 is provided on the diametrically opposite side of the threaded part of the contact adapter 1. A stop portion 18 is placed in this depression 19. The two shell halves are connected by screws 20.

A radially extending depression 21 (the function of which will be explained later) is arranged on the rear side of the two shell halves 14.
The rear end of the housing is provided with an internal thread 22 which continues towards the front side into a radial shoulder 23.

A mounting disc 24 is crimped onto this radial shoulder as shown in detail in FIGS. 3 and 4. Four axially projecting protrusions or ears 25 are provided on the periphery of the metal mounting take 24 and spaced apart from each other at equal intervals. This prong is inserted into the recess 21 of the outer shell half piece. Four radially inward protrusions 9a are provided on the periphery of the cable opening of the housing 9, spaced equally apart from each other. This protrusion 9a is fitted into the gap between the prongs 25 of the mounting disk 24, thereby attaching the mounting disk to the housing so that it cannot rotate relative to the housing. Three step-like protrusions 26 obtained by deforming the mounting disk body are provided equidistantly apart from each other over the circumference of the disk. These step-like protrusions are gradually raised in the circumferential direction, and the edges of these protrusions are cut off. Stuffing assembly or stuffing box
-BOx) includes a thrust member 28, a sealing ring 29,
The external thread of the thrust member 28 is connected to the internal thread 2 of the rear end of the housing 9 facing the washer 30.
Screw on 2.

The above plug connector forms only one component of a two-piece plug connector.

Two plug connectors that can be coupled can be coupled by a coupling ring 12. The other part of the connector may be in the form of an instrument-side connector, for example, and of the same design as the connector described above. The other part of the connector will therefore not be described in detail. The components of the plug connector have been described in detail, and assembly is as follows.

The coupling ring 12 is pushed into the contact adapter 1 from the front side of the contact adapter 1, and the radial shoulder is crimped onto the radial flange of the contact adapter 1. The spring ring 13 is then pushed into the coupling ring from the rear end, snapping the spring ring into the radial groove of the coupling ring 12. At this time, the O-ring 11 is fitted into the threaded portion 7 of the contact adapter 1. The remaining components are the thrust member 28, washer 30, and sealing ring 2.
9. Mounting disk 24, housing 9 and cable 5 in sequence.
Push it into the end of the The insulation is removed from the lead wire 4 of the cable 5, and then soldered to the soldering terminal of the contact member 2. Next, the two shell halves 14 of the cable clamp 15
into the cable 5 and connect with screws. The lock shoulder 17 of the support arm 16 is snapped into the recess 19 of the contact adapter 1. After this, the housing 9 is pushed onto the cable clamp 15 and the internal thread 8 of the housing is screwed onto the external thread of the contact adapter 1. The mounting disc 24 is pushed into the opening provided in the housing 9 of the cable, so that the lug 25 of the mounting disc enters between the relevant recess in the surface of the shell half 14 and the projection 9a in the cable entry area of the housing 9. After this, the sealing ring 29 and washer 30 are pressed onto the mounting disc 24, and the thrust member 28 is screwed onto the housing 9, and the step-shaped projection 26 of the mounting disc is screwed onto the housing 9.
into the sealing ring 29. At this time, a sealing ring is crimped onto the periphery of the cable 5 to seal it. Once the thrust member 28 is tightened, the contact adapter 1 cannot rotate.

That is, the contact adapter is prevented from rotating relative to the housing via the cable clamp 15 and the mounting disk 24, thereby preventing the contact adapter from being unintentionally separated from the housing. This advantageous feature is the cable clamp 1
It can be obtained without using 5. That is, either a recess is formed in the contact adapter that corresponds to the recess 21 and extends to fit into the lug 25 of the mounting disc 24, or a corresponding coupling member is inserted between the contact adapter 1 and the mounting disc 24. . A preferred embodiment of a circular plug connector of this type is shown in FIG. 7, which is not provided with a cable clamp. Components are indicated by the same symbols or symbols with a dash as in other drawings. In this embodiment, the axial length of the contact adapter 1b is the protrusion 25 of the mounting disk 24'.
′ should be long enough to fit into the recess 2′. Therefore, the contact adapter 1' is connected to the housing 9! After screwing into the mounting disc 24' and inserting it into the mounting disc 24' without rotating,
4'' cannot be unscrewed without removing the cable of the housing 9. As shown in the illustrated embodiment, the invention, in addition to the feature of non-rotation relative to the sealing ring provided by the projection 26 of the mounting disk 24, It is characterized by a radial protrusion 9a disposed in the opening and engaging the lug 25 of the mounting disk to prevent relative rotation with respect to the housing.

Although the step-like projection 26 of the mounting disk 24 is formed by deforming the material, it is also possible to form the step-like projection 26 in other ways.

The only important point is that there is a relatively strong frictional force between the mounting disk 24 and the sealing ring 29. This condition can also be achieved by forming the disk 24 into a corrugated shape. As shown in FIGS. 1 and 6, the cable clamp 15 is provided with radially projecting clamp jaws 31 at the inner periphery of the shell half-piece 14.

When the two shell halves 14 are threaded together, the clamp jaws 31 provide a predetermined inner diameter.

Cables having a diameter equal to or smaller than the inner diameter formed by the two shell halves are not gripped by the clamp.

Plug-type connectors can be provided with different cable clamps 15 that can be adapted to different cable diameters, but this adds complexity and costs. becomes higher. It is therefore more convenient to use a clamp jaw insert 33 as shown in FIGS. 5 and 6. Clamp jaw insertion member 3 inserted into shell half piece 14 in FIG.
3 is shown. The height of the insert 33 is such that it can enter the space between the clamping jaws 31 of the two opposing shell halves 14, thereby clamping a cable of reduced diameter. I can do it. As shown in FIGS. 5 and 6, the cable clamp jaw insert 33 is provided with a lateral guide groove 34 which engages a corresponding guide projection 35 arranged on the shell half 14. In the axial continuation of the support arm 16, the outer shell half piece 14
A radial recess 32 is provided in the recess, and a clamp jaw insert 33 is inserted into this recess. Clamp jaw insertion member 3
Two clamping parts 36 are formed on the inner periphery of 3. Outer shell half piece 1
4 is also provided with a holding part as a clamp jaw part 31. Fifth
The two clamp jaw inserts 33 shown are connected to the shell halves 14 via bridges 37.

The purpose of this bridge is to insert two clamp jaw inserts 33.
It merely maintains the connection between the shell halves 14 and the shell halves 14 and thereby prevents the insert from disassociating. If necessary, the user breaks the bridge 37 and inserts the two clamp jaw inserts 33 into the shell halves 14. If larger diameter cables are to be gripped, the clamp jaw insert is not necessary and will therefore not be described.

[Brief explanation of the drawing]

FIG. 1 is a developed view of the individual components of the circular plug connector according to the present invention, FIG. 2 is a sectional view of the assembled plug connector shown in FIG. 1, and FIG. 3 is a plan view of the mounting disk. 4 is a side view of the mounting disk shown in FIG. 3; FIG. 5 is a perspective view of the cable clamping means constituted by two halves and comprising a clamp jaw insert; and FIG. 6 is a perspective view of the clamp. FIG. 7 is a perspective view of one piece of the clamp jaw with the jaw insert; FIG. 7 is a sectional view of another embodiment of the circular plug connector according to the invention; 1...Contact adapter, 2...Contact member, 3...Opening, 4...Lead wire, 5...
... Cable, 6 ... Radial flange, 7 ... External thread, 8 ... Internal thread,
9...Housing, 9a...Protrusion,
10...Radial groove, 11...0 ring, 12...Coupling ring, 13...Radial groove, 14...Outer shell Half piece, 15...
... Cable clamp, 16... Support arm,
17... Lock shoulder part, 18... Stop part,
19, 21... recess, 20... screw,
22... Internal screw, 23... Shoulder, 2
4... Mounting disk, 25... Pronged ears,
26...Step-like protrusion, 27...
External screw, 28... Thrust member, 29...
...Blocking ring, 30...Washer, 31...
...Clamp jaw, 32...Indentation, 33...
... Clamp jaw insertion member, 34 ... Side guide groove, 35 ... Guide projection, 36 ...
Clamping part, 37... Bridge.

Claims (1)

[Claims] 1. A substantially hollow cylindrical housing, a contact adapter that is removably screwed to one side of the housing, and a contact adapter that is inserted into the contact adapter and contacts a lead wire surrounded by a cable. a packing box having a sealing ring and a thrust member and mounted on the other side of the housing; between the sealing ring and a portion of the housing that axially supports the sealing ring; a mounting disk disposed at an axial position, the mounting disk is provided with a plurality of protruding ears that protrude in the axial direction, and these protruding ears are fitted into recesses formed in the contact adapter to connect the mounting disk and the contact adapter. and a plurality of step-like protrusions are provided on the side of the mounting disk opposite the sealing ring, into which the sealing ring is inserted, and the housing is provided with a plurality of stepped protrusions that fit into the gaps between the protrusions of the mounting disk. A radially inward protrusion is provided, and the sealing ring is formed of an elastic material, and when the packing box is attached to the housing, the sealing ring frictionally engages with the inner wall of the housing and is attached to the housing so that it cannot rotate relative to the housing. A circular plug connector characterized by: 2. The circular plug connector according to claim 1, wherein the mounting disk is made of a metal material, and the stepped protrusion is formed by deforming the material. 3. The thrust member is provided with a screw, the screw is screwed into the alignment screw of the housing, and the mounting disk is provided with a step-like protrusion that gradually protrudes in the direction in which the thrust member is screwed, and the step-like protrusion is Claim 1 characterized in that the axial end edge of the end portion is sharpened.
Circular plug connector as described. 4. The circular plug connector according to claim 1, wherein the packing box has a washer inserted in the axial direction between the sealing ring and the thrust member. 5. A substantially hollow cylindrical housing, a contact adapter that is removably screwed to one side of the housing, at least one contact member that is inserted into the contact adapter, and a lead wire that is connected to the contact member. a cable clamp for clamping within said housing a cable surrounding said housing; a packing box having a sealing ring and a thrust member and mounted on the other side of said housing; said sealing ring and said sealing ring of said housing axially a mounting disc disposed in an axial position between the supporting parts, said cable clamp comprising two shell halves connected together by means of a fastening means, and said cable clamp comprising two shell halves connected together by means of a fastening means; a directionally projecting support arm is provided, a locking shoulder is provided at the distal end of the support arm, the locking shoulder is engaged with two diametrically opposed recesses provided on the outer peripheral edge of the contact adapter; The support arm is engaged with a radial stop provided in the recess to prevent relative rotation between the contact adapter and the cable clamp, and the mounting disk is engaged with a recess formed in the opposite end of the cable clamp from the support arm. A plurality of projecting ears projecting in the axial direction are provided to prevent relative rotation between the mounting disk and the cable clamp, and a plurality of stepped protrusions are provided on the side of the mounting disk opposite to the sealing ring into which the sealing ring is inserted. wherein the housing has a radially inward protrusion that fits into a gap between the ears of the mounting disc, and the sealing ring is formed of a resilient material;
A circular plug connector characterized in that when the packing box is attached to the housing, the sealing ring frictionally engages with the inner wall of the housing and is attached to the housing so that it cannot rotate relative to the housing. 6 the cable clamp is configured with diametrically opposed radially inwardly projecting clamp jaws;
A radial recess is formed between the clamp jaws on the inner surface of the outer shell half piece, and a clamp jaw insertion member is removably inserted into the radial recess so as to be in a locked state. 6. The circular plug connector according to claim 5, wherein the height of the jaw insertion member in the radial direction is such that the insertion member projects into the space between the two opposing clamp jaws. 7. The cable clamp is formed of a plastic material, and each of the clamp jaw inserts is formed integrally with the shell half-piece and is connected to the shell via a weakened bridge disposed on the opposite end face from the support arm. 7. A circular plug connector according to claim 6, characterized in that a clamp jaw insertion member is coupled to the half-piece.