JPS5841737Y2 - Sleeve retaining device for round connectors - Google Patents

Description

[Detailed description of the invention] This invention is assembled by fitting a metal outer sleeve, which serves as an outer terminal, to the outer periphery of a cylindrical body made of a synthetic resin insulating material that holds a connection terminal. In the prototype connector configured by attaching the outer sleeve to the outer circumference of the body, a protrusion provided on the outer circumferential surface of the body,
A guide groove is formed in the outer cylindrical sleeve so as to be cut in the axial direction from the front end edge thereof to a width that allows the protrusion to fit therein, and a guide groove is cut in the circumferential direction from the rear end of the guide groove to a width that allows the protrusion to be inserted thereinto. This invention relates to an improvement in a means for assembling an outer cylindrical sleeve by engagement with an engaging groove formed in the outer sleeve.

The method for assembling the outer sleeve in the original connector described above has the advantage that the operation for assembling the outer sleeve to the body is simple. Since the fitting is only in the axial direction, the outer sleeve rotates in the opposite direction to the direction of rotation when fitting the outer sleeve to the body, and the protrusion is positioned within the guide groove. As a result, there is a problem in that the outer sleeve easily comes off and falls off when pulled in the axial direction.

For this reason, attempts have been made to form a locking groove that locks with the protrusion into a hook-shaped locking part with barbs in the axial direction, but this method does not allow locking in the axial direction in the locked state. Since it becomes loose, by adding circumferential movement to the axial movement, the locking can be easily released in the same manner as the above-mentioned means, and the outer sleeve can be removed from the body.

Furthermore, in addition to the protrusion and the L-shaped groove that fits into it, an engagement groove that runs along the axial direction and an engagement claw that removably fits into the engagement groove are separately provided, thereby allowing movement in the circumferential direction. There are also known means for regulating this, but the second method is to operate the engaging claw so that it is removed from the engaging groove as the protrusion is fitted into the L-shaped groove. The assembly operation is troublesome, and the engagement claws that restrict circumferential movement can easily come loose, making assembly uncertain. There is a problem that the structure for configuring the pawl to engage and disengage from the retaining groove becomes complicated.

The present invention was devised in view of the above-mentioned problems with the conventional means, and in order to make it possible to securely engage the outer cylinder sleeve to the body with a simple operation,
By fitting the protrusion provided on the body into the L-shaped groove provided on the outer sleeve and engaging it in the axial direction,
A protrusion provided on the body outside the protrusion in order to engage the body and the outer sleeve in the circumferential direction is engaged with the outer sleeve at the same time, and The purpose is to ensure that the body and the outer sleeve are securely engaged upon completion of the axial engagement.

As described above, the means of the present invention for achieving this object consists of a protrusion provided on the outer peripheral surface of the body, an axial guide groove provided in the outer sleeve, and a circumferential engagement groove continuous therewith. In the original connector in which the outer sleeve is assembled to the outer periphery of the body, the metal outer sleeve 3 has a cut 3 in the axial direction formed by a metal plate rolled into a cylindrical shape.
0, and is formed into a cylindrical shape that elastically expands and contracts, and the outer circumferential surface of the body 1 is provided with an outer cylinder when the projection 10 is fitted into the engagement groove 32 of the outer cylinder sleeve 3. It fits into a window hole 33 separately provided in the sleeve 3 or engages with the long side 31 a of the guide groove 31 of the outer sleeve 3 in the axial direction, and is removed from the engagement groove 32 of the outer sleeve 3. This is characterized in that another engaging protrusion 11 is formed to prevent the protrusion 10 from rotating in the direction of escape.

Next, the embodiment will be explained in detail based on the drawings. 1 is the connecting terminal 2 which becomes the inner pole (in the drawing, only the soldered terminal that extends backward is shown). This is a holding body that is made of an insulating material such as synthetic resin and is formed into a cylindrical shape.

Reference numeral 10 denotes a protrusion formed on the outer circumferential surface of the body 1 so as to protrude in the radial direction. Two of them are formed with a phase difference of 180° when viewed from the rear.

Reference numeral 3 denotes an outer cylinder sleeve that is fitted and assembled onto the outer periphery of the body 1 so as to form an outer pole, and is formed into a cylindrical shape by winding a metal plate and bending it so that the free end surface on the winding side forms a cut 30 in the axial direction. When the diameter is forcibly expanded, the cut 30 expands elastically, allowing it to expand and contract.

31 is an axial guide groove provided in the outer sleeve 3;
It is formed into a groove shape which is cut from the front end edge (left end edge in FIG. 3) of the outer cylinder sleeve 3 toward the rear end edge along the axial direction with a width into which the aforementioned protrusion 10 is fitted.

Further, at the rear end of the guide groove 31, an engagement groove 32 in the form of a cut groove is continuously formed, which is cut in the circumferential direction from the rear end.

Furthermore, a lug piece is formed at the rear end of the outer sleeve 3 to hold the outer surface of the connecting terminal 2 of the body 1 and the cord 4 that connects the connecting wire to the outer sleeve 3. It is.

Reference numeral 11 indicates how the outer cylindrical sleeve 3 fitted onto the outer periphery of the body 1 is fitted into the protrusion 10 provided on the outer periphery of the body 1 and the guide groove 31 and engagement groove 32 provided on the outer cylindrical sleeve 3. The outer cylindrical sleeve 3 is formed on the outer circumferential surface of the body 1 in order to prevent the outer sleeve 3 from rotating in the circumferential direction relative to the body 1 when assembled to the body 1. This is another engagement protrusion, and as shown in FIG. 2, it is formed at a position adjacent to and parallel to the protrusion 10 in the circumferential direction.

The position of the locking protrusion 11 adjacent to the protrusion 10 is as shown in FIG.
When the protrusion 10 is rotated from the state in which it is inserted into the engagement groove 32 to the state in which it is further inserted into the engagement groove 32 as shown in FIG. On the rear side of the portion 10, and as shown in FIG. The bamboo steamer is set in the position where it is.

As a result, in the state shown in FIG. 11, when the body 1 or the outer sleeve 3 is rotated in the direction in which the protrusion 10 escapes from the engagement groove 32 and releases the engagement, , the rotation in the release direction is controlled by the locking protrusion 11.
As shown in FIG. 7, this is prevented by engaging with the long side 31a of the guide groove 31 along the axial direction.

As shown in FIG. 8, the locking in the circumferential direction by the locking projection 11 is performed by separating the locking projection 11 from the projection 10 in the circumferential direction in the direction of rotation for releasing the body 1. The outer cylindrical sleeve 3 is provided with a window hole 33 that fits and engages with the engaging protrusion 11 as shown in FIGS. 8 and 9. This may be done by positioning and shaping the crest, which has been fitted into the engagement groove 32 after a process, so as to engage with the engagement protrusion 11 as shown in FIG.

Note that an appropriate number of engagement protrusions 11 may be provided.

Next, the process of fitting the outer sleeve 1 to the outer periphery of the body 1 in the means for assembling the outer sleeve in the circular connector according to the present invention constructed as described above will be explained.

As shown in FIG. 5 or FIG. 8, the outer cylinder sleeve 3 is positioned so that the front end opening of the guide groove 31 faces the protrusion 10 formed on the outer circumferential surface of the body 1, and from this state, the outer cylinder is removed. The sleeve 3 is fitted around the outer periphery of the body 1 to obtain the state shown in FIG. 6 or 9.

At this time, the outer cylindrical sleeve 3 has a guide groove 31 formed in the axial direction in the opening at its front end, making it easy to expand the diameter. However, if it is difficult to fit the outer cylindrical sleeve 3 into the outer periphery of the body 1, as shown in FIG. The front end edge is placed over the upper surface of the engagement protrusion 11, and then the body 1 is pushed into the body 1 so as to be fitted therein.

Next, from the state shown in FIGS. 6 and 9, the outer sleeve 3 cannot be slid relative to the body 1 in the circumferential direction, resulting in the state shown in FIGS. 7 and 10.

In this state, the outer sleeve 3 and the body 1 are fixed in the axial direction by engagement between the protrusion 10 provided on the body 1 and the engagement groove 32 provided on the outer sleeve 3, and In the circumferential direction, it is fixed by the engagement between the engaging protrusion 11 provided on the body 1 and the guide groove 31 or window hole 33 provided on the outer sleeve 3, so that it is fitted without loosening. Becomes to combine.

Next, to explain the function and effect, as described above, in the outer sleeve assembly device for the round connector according to the present invention, the metal outer sleeve 3 is cut in the axial direction by a metal plate rolled into a cylindrical shape. 30, and is formed into a cylindrical shape that expands and contracts elastically, and on the outer peripheral surface of the body 1, a guide groove 31 formed in the outer sleeve 3 and an engagement groove 32 connected thereto are fitted. When the projection 10 is guided from the guide groove 31 into the engagement groove 32 and engaged with the engagement groove 32, the outer cylinder The guide groove 31 formed in the sleeve 3
A retaining protrusion 11 is provided to engage with the axial long side 31a of the sleeve 3 or the window hole 33 formed in the outer cylinder sleeve 3, and the engaging protrusion 11 restricts movement in the circumferential direction. Therefore, when the protrusion 10 provided on the outer circumferential surface of the body 1 is fitted into the guide groove 31 provided on the outer circumferential sleeve 3, the outer circumferential sleeve 3 is attached to the outer circumferential surface of the body 1.
As the sleeve 3 is inserted, the diameter of the outer cylinder sleeve 3 that abuts against the retaining protrusion 11 provided on the outer circumferential surface of the body 1 expands due to the widening of the cut 30, and the outer cylinder sleeve 3 is placed over the retaining protrusion 11. It is inserted.

When the protrusion 10 reaches the base end of the guide groove 31, the outer sleeve 3 is rotated relative to the body 1 so that the protrusion 10 moves into the engagement groove 32. The engagement protrusion 11 that had entered the inner peripheral surface of the
However, as the outer sleeve 3 moves to a position corresponding to the window hole 33 provided in the outer sleeve 3 or the above-mentioned guide groove 31, the outer sleeve 3, which had expanded in diameter, elastically snaps back to its old state. Returning, the engagement protrusion 11 is fitted into the window hole 33 or the guide groove 31, and at the same time, the protrusion 10 is fitted into the retaining groove 32, completing the assembly.

Therefore, by inserting the protrusion 10 provided on the outer peripheral surface of the body 1 into the L-shaped groove formed by the guide groove 31 and the engagement groove 32 provided on the outer cylinder sleeve 3, the body 1 and the outer cylinder are connected. The protrusion 1 is configured to engage the sleeve 3 in the circumferential direction.
0 and an engaging protrusion 1 provided on the outer peripheral surface of the body 1.
Since the attachment to the first outer cylinder sleeve 3 is completed at the same time, the assembly operation becomes easier.

When the assembly is completed, the outer sleeve 3 will not come out from the body 1 unless you twist it against the body 1 and rotate it while expanding the diameter. Therefore, the engagement between the body 1 and the outer cylinder sleeve 3 is also ensured.

[Brief explanation of the drawing]

Figure 1 is a side view of the outer sleeve assembled to the body, Figure 2 is a perspective view of the body, Figure 3 is a perspective view of the outer sleeve, Figures 4, 5, 6, Fig. 7 is an explanatory diagram of the action, Figs. 8, 9, and 10 are explanatory diagrams of the action showing the assembled state of another embodiment, and Fig. 11 A, C, and C are explanatory diagrams of the action. be. Explanation of drawing symbols 1...Body, 2...
・Connection terminal, 3... Outer cylinder sleeve, 10...
...Protrusion, 11...Engagement protrusion, 30...
... Sleeve cut, 31 ... Guide groove,
31a... Long side in the axial direction same as above, 32...
...Engagement groove, 33...Window hole.

Claims (1)

[Scope of utility model registration request] A metal outer cylindrical sleeve 3 is fitted onto the outer periphery of a cylindrical body 1 made of an insulating material that holds a connecting terminal 2 by sliding in the axial direction and sliding in the circumferential direction. The sleeve 3 has a protrusion 10 formed on the outer peripheral surface of the body 1 so as to protrude in the radial direction, and a cut in the outer cylindrical sleeve 3 from its front end edge in the axial direction with a width that allows the protrusion 10 to be inserted therein. In the original connector, which is assembled integrally by engagement with a guide groove 31 formed and an engagement groove 32 formed so as to cut in the circumferential direction from the rear end of the guide groove 31 with a width for fitting the protrusion 10. , the metal outer cylinder sleeve 3 is
The body 1 is formed into a cylindrical shape that elastically expands and contracts with cuts 30 in the axial direction made of a metal plate rolled into a cylindrical shape. In the state where it is fitted into the groove 32, it fits into a window hole 33 separately provided in the outer sleeve 3 or engages with the long side 31a in the axial direction of the guide groove 31 of the outer sleeve 3, An assembly of an outer sleeve in a prototype connector, characterized in that another engaging protrusion 11 is formed to prevent the outer sleeve 3 from rotating in a direction in which the protrusion 10 escapes from the retaining groove 32. Attached is the device.