JP7446682B2 - teaching device - Google Patents

Description

The present invention relates to a housing with a connector, and particularly to a housing having a substantially rectangular parallelepiped outer shape, in which a one-touch lock type connector is disposed at the intersection of two of the six faces of the rectangular parallelepiped that intersect with each other. Regarding the housing.
The present invention also relates to a teaching device having such a housing with a connector.

A teaching device for teaching operations to industrial robots, various actuators, etc. is disclosed in, for example, Patent Document 1. As shown in FIG. 8, the teaching device 1 disclosed in Patent Document 1 includes a display 3 with a touch panel and a plurality of operation units 4 arranged on the surface of a housing 2 having an approximately rectangular external shape. When the operator operates the display 3 with a touch panel and the plurality of operation units 4, operations are taught to controllers (not shown) such as robots and actuators connected via the cable 5.

In order to improve the operability and convenience of the teaching device 1, a housing side connector 6 is attached to the housing 2, and a cable side connector 7 is attached to the end of the cable 5. By fitting 7, the cable 5 is connected to the teaching device 1.

JP2014-215781A

The operator grasps the casing 2 of the teaching device 1 with both hands and operates the touch panel display 3 and the plurality of operation units 4 while looking at the touch panel display 3. The housing connector 6 is arranged diagonally at the lower corner of the housing 2, which is held by the operator and has an approximately rectangular parallelepiped external shape, so that the cable 5 that is connected does not get in the way of the operator. may be desired.

In addition, the housing side connector 6 and the cable side connector 7 used in the teaching device 1 can be easily mated and locked in the mated state in order to improve the operability and reliability of connecting the cable 5 to the housing 2. It is preferable that the connector assembly be a so-called one-touch lock type connector assembly that can be used in various ways. In this one-touch lock type connector assembly, when a plug connector having a coupling nut is fitted into a receptacle connector having a shell, a protrusion formed on the inner circumferential surface of the coupling nut is formed on the outer circumferential surface of the shell. There is a known type of receptacle connector that locks the fitting between a receptacle connector and a plug connector by fitting into a groove formed by the receptacle connector.

An operator grasps and operates the teaching device 1, in which the cable 5 is diagonally connected to the lower corner of the housing 2 via the one-touch lock type housing side connector 6 and cable side connector 7. If the teaching device 1 accidentally falls directly below from the operator's hand, the impact of the fall will be applied to the housing connector 6 and the cable connector 7.
Here, in the one-touch lock type connector assembly described above, since a groove is formed on the outer peripheral surface of the shell of the receptacle connector, the thickness of the shell is reduced in accordance with the position where the groove is formed. It has a thin section. Therefore, if stress is concentrated on the thin wall portion of the shell when the teaching device 1 is dropped, the shell may be damaged and the connection of the cable 5 by the one-touch lock type connector assembly may be impaired.

This invention was made in order to solve these conventional problems, and the connector, which can easily be mated with a mating connector and locked in the mated state, is installed diagonally at the corner of the housing. An object of the present invention is to provide a casing with a connector that has excellent durability against the impact of dropping even though the casing is disposed in the casing.
Another object of the present invention is to provide a teaching device having such a housing with a connector.

The present inventors used a teaching device in which a housing-side connector was arranged such that the center axis extended diagonally from the lower corner of a housing having an approximately rectangular parallelepiped external shape, and used a teaching device to fit a cable-side connector into the housing-side connector. As a result of repeated drop experiments with the connectors in the same state, it was found that there is a specific directionality in the impact force of a drop that is applied to the housing-side connector and the cable-side connector. In other words, if we assume that among the six surfaces of the casing, the surface P is perpendicular to both of the two intersecting surfaces forming the lower corner of the casing where the casing-side connector is arranged, then the casing-side connector It has been found that, although the impact force applied in the direction perpendicular to the orthogonal plane P to the cable-side connector is small, the impact force is large in the direction parallel to the orthogonal plane P.

Therefore, in the present invention, a connector assembly consisting of a housing side connector and a cable side connector is combined with a connector having a groove formed on the outer peripheral surface of the shell and a mating connector having a protrusion formed on the inner peripheral surface of the coupling nut. When mating, the groove and protrusion are arranged on the housing side so that they are not arranged in a direction parallel to the central axis of the connector on the housing side and a plane perpendicular to both of the two intersecting surfaces of the housing. By attaching the connector to the housing, the connector assembly has excellent durability against impact from being dropped.

That is, when the housing-side connector is a receptacle connector having a shell, the groove on the outer circumferential surface of the shell is located at a plane P perpendicular to both of the two intersecting surfaces of the housing with respect to the central axis of the housing-side connector. If the housing-side connector is attached to the housing so that it is arranged in a direction other than parallel to The housing-side connector is attached to the housing so that the protrusion of It is attached.

The teaching device according to the present invention includes a housing having a substantially rectangular external shape, a display and an operation unit disposed on one of the six sides of the housing forming the rectangular parallelepiped, and a connector that is disposed at the intersection of two surfaces that are orthogonal to the one surface and intersect with each other and that fits into the mating connector along a central axis that extends obliquely to the two surfaces; One of the side connectors has a groove formed on the outer peripheral surface of a cylindrical shell surrounding the central axis, and the other of the connector and the mating connector has a groove formed on the outer peripheral surface of the shell when the connector and the mating connector are mated. The connector has a protrusion that is formed on the inner peripheral surface of the coupling nut that is arranged to surround the connector and that fits into the groove, and the groove or protrusion of the connector has a surface perpendicular to both of the two intersecting surfaces on the central axis. It is arranged in a direction other than parallel to .

The groove or protrusion of the connector is preferably arranged in a direction perpendicular to a plane perpendicular to two intersecting planes with respect to the central axis.
Preferably, the connector has two grooves or two protrusions arranged on both sides of the central axis with the central axis in between.
The shell and coupling nut can be formed from resin material.

It is preferable that the groove portion when the connector and the mating connector are fitted is arranged so as to be parallel to a plane perpendicular to both of the two intersecting planes and not to intersect with a plane passing through the central axis.
The groove has a guide part that guides the insertion of the protrusion when the connector and the mating connector are mated, and a fixing part that is connected to the guide part and fixes the position of the protrusion. The fixing part is open at the front end of the shell facing the mating connector, and the width of the groove in the circumferential direction narrows from the front end toward the rear end of the shell along the central axis. It can be configured such that it is connected to the part where the groove width in the direction is the narrowest.

According to the present invention, the connector is disposed at the intersection of two of the six surfaces of the casing forming a substantially rectangular parallelepiped, and is fitted into the mating connector along the central axis extending obliquely to the two surfaces. One of the connector and the mating connector has a groove formed on the outer peripheral surface of the shell, and the other of the connector and the mating connector has a groove formed on the inner peripheral surface of the coupling nut. The groove or protrusion of the connector, which has a protrusion that fits into the connector, is arranged in a direction other than parallel to the plane perpendicular to the two intersecting planes with respect to the central axis, so it is difficult to connect with the mating connector. It is possible to provide a housing with a connector that can easily be mated and locked in the mated state, and that has excellent durability against impact from being dropped, even though the connector is arranged diagonally at the corner of the housing. It becomes possible.

FIG. 1 is a perspective view showing a teaching device according to an embodiment of the invention. FIG. 2 is a partial perspective view showing a corner of a casing in which a casing-side connector is arranged in the teaching device according to the embodiment. FIG. 3 is a plan view showing a shell used in the housing-side connector. FIG. 2 is a perspective view showing a cable-side connector fitted to a housing-side connector in the teaching device according to the embodiment. It is a sectional view showing a coupling nut used for a cable side connector. FIG. 3 is a partial perspective view showing a state in which the cable-side connector is aligned with the housing-side connector in the teaching device according to the embodiment. FIG. 2 is a partial perspective view showing a state in which a cable-side connector is fitted to a housing-side connector in the teaching device according to the embodiment. FIG. 2 is a front view showing a conventional teaching device.

Embodiments of the present invention will be described below based on the accompanying drawings.
FIG. 1 shows a teaching device 11 according to an embodiment. The teaching device 11 has a housing 12 having a substantially rectangular parallelepiped outer shape, and a display 13 and a plurality of operation units 14 are arranged on the surface of the housing 12. Note that the display 13 can also be a display with a touch panel.
Furthermore, a housing-side connector 21 (connector) is attached to a corner of the housing 12.

A cable-side connector 31 (a mating connector) attached to the end of the cable 41 is removably fitted to the housing-side connector 21, and the housing-side connector 21 and the cable-side connector 31 are connected to a so-called one-touch lock system. A connector assembly A is constructed.
The housing 12 and the housing connector 21 form a housing with a connector, and the teaching device 11 is configured using the housing with a connector.

Here, for convenience, the surface of the casing 12 on which the display 13 and the plurality of operation units 14 are arranged extends along the XY plane, and the rectangular parallelepiped forming the outer shape of the casing 12 extends along the XY plane and extends along the XY plane. A pair of planes spaced apart in the Z direction perpendicular to the surface, a pair of planes extending along the XZ plane and spaced apart in the Y direction, and a pair of planes extending along the YZ plane and spaced apart in the X direction. shall include the plane of

The display 13 and the plurality of operation units 14 are arranged on a plane P1 on the +Z direction side of a pair of planes extending along the XY plane of the housing 12.
Furthermore, the housing side connector 21 is connected to a plane P2 on the -Y direction side of a pair of planes extending along the XZ plane of the housing 12, and a plane P2 on the -X direction side of a pair of planes extending along the YZ plane of the housing 12. It is disposed at a corner of the casing 12 that intersects with the side plane P3, and faces in a diagonal direction with respect to these planes P2 and P3.

As shown in FIG. 2, the housing-side connector 21 has a central axis C1 that extends diagonally with respect to a plane P2 extending along the XZ plane of the housing 12 and a plane P3 extending along the YZ plane. Specifically, the central axis C1 of the housing-side connector 21 is inclined at an angle of 135 degrees with respect to the planes P2 and P3, and is parallel to the plane P1 along the XY plane and extends from the inside of the housing 12 to the outside. extending in the direction.

The housing-side connector 21 is a receptacle connector, and has a plurality of pin contacts 22 that each extend parallel to the central axis C1, and an insulator 23 that holds the plurality of pin contacts 22. The housing-side connector 21 further includes a cylindrical barrel 24 that is held by the insulator 23, surrounds the plurality of pin contacts 22, and extends in the direction of the central axis C1, and a cylindrical barrel 24 that surrounds the outer peripheries of the insulator 23 and the barrel 24 and that extends in the direction of the central axis C1. It has a cylindrical shell 25 extending in the direction of.
An annular gap is formed between the barrel 24 and the shell 25.
Note that the plurality of pin contacts 22 and the barrel 24 are made of a conductive material such as metal, and the insulator 23 and the shell 25 are made of an insulating resin material.

The shell 25 has a cylindrical part 26 that is exposed to the outside of the casing 12 from a corner of the casing 12 and extends along the central axis C1, and a pair of grooves 27 are formed on the outer peripheral surface of the cylindrical part 26. has been done. These pair of grooves 27 are arranged in a direction perpendicular to a plane P1 that is perpendicular to both planes P2 and P3 that form the corner of the casing 12 where the casing-side connector 21 is arranged, with respect to the central axis C1; That is, they are arranged in the Z direction. Specifically, the pair of groove portions 27 are arranged on both sides of the center axis C1 in the Z direction with the center axis C1 in between.

The cylindrical portion 26 has a front end portion 26A that is an end portion facing outside of the housing 12 along the central axis C1. The front end 26A of the cylindrical portion 26 also forms the front end of the shell 25, and each groove 27 is open in the direction along the central axis C1 at the front end 26A of the cylindrical portion 26. Furthermore, since the pair of grooves 27 are formed on the outer peripheral surface of the cylindrical portion 26, the plate thickness of the cylindrical portion 26 at the positions where the pair of grooves 27 are formed is the same as the thickness of the tube at the position where the grooves 27 are not formed. It is thinner than the plate thickness of the shaped portion 26 by the depth of the groove portion 27.

Furthermore, a first marker M1 is formed at a predetermined location facing in the +Z direction of the corner of the housing 12 where the housing-side connector 21 is arranged. This first marker M1 serves as a mark indicating the rotational position around the central axis C1 in which the pair of grooves 27 are formed, and is an arrow pointing toward the outside of the casing 12 along the central axis C1. It has a shape.

FIG. 3 shows the shell 25 viewed from the +Z direction. The shell 25 has a shell body 28 that is integrally connected to a cylindrical portion 26 . The shell body 28 covers the outer circumference of the insulator 23 shown in FIG. 2, and is embedded in the housing 12 when the housing connector 21 is placed at a corner of the housing 12.

The groove portion 27 formed on the outer peripheral surface of the cylindrical portion 26 includes a guide portion 27A that is open in the direction along the central axis C1 at the front end portion 26A of the cylindrical portion 26, and a fixed groove portion 27 that is connected to the guide portion 27A. 27B. The guide portion 27A has a shape in which the groove width in the circumferential direction narrows from the front end 26A of the cylindrical portion 26 toward the rear of the shell 25 along the central axis C1. It has a shape that is connected to the portion where the groove width in the circumferential direction is narrowest and extends a predetermined length in the circumferential direction of the cylindrical portion 26 .

Further, any part of the groove portion 27 having the guide portion 27A and the fixing portion 27B is a plane perpendicular to both planes P2 and P3 forming the corner of the casing 12 where the casing-side connector 21 is arranged. It is arranged so as not to intersect a plane parallel to P1 and passing through the central axis C1, that is, an XY plane passing through the central axis C1.

FIG. 4 shows a cable-side connector 31 that is a mating connector for such a case-side connector 21. The cable-side connector 31 is a plug connector attached to the end of the cable 41 and has a central axis C2 extending on an extension line of the cable 41.
The cable side connector 31 has a plurality of socket contacts 32 each extending parallel to the central axis C2, and an insulator 33 that holds the plurality of socket contacts 32. The cable side connector 31 further includes a cylindrical barrel 34 that surrounds the outer periphery of the insulator 33 and extends in the direction of the central axis C2, and a cylindrical coupling that surrounds the outer periphery of the barrel 34 and extends in the direction of the central axis C2. It has a nut 35.

The plurality of socket contacts 32 correspond to the plurality of pin contacts 22 of the housing side connector 21, an annular gap is formed between the insulator 33 and the barrel 34, and an annular gap is formed between the barrel 34 and the coupling nut 35. Also, an annular gap is formed.
Note that the plural socket contacts 32 and the barrel 34 are made of a conductive material such as metal, and the insulator 33 and the coupling nut 35 are made of an insulating resin material.

The coupling nut 35 is rotatably attached to the barrel 34, and is elasticized in a predetermined rotational direction about the central axis C2 with respect to the barrel 34 by an elastic member (not shown) built into the cable side connector 31. It is in a state of being endowed with power.
A pair of protrusions 36 are formed on the inner peripheral surface of the coupling nut 35 and protrude toward the central axis C2. These pair of protrusions 36 are located on one diameter of the coupling nut 35, and are arranged on both sides of the central axis C2 with the central axis C2 in between.

Further, a second marker M2 is formed on the outer circumferential surface of the coupling nut 35, corresponding to the position where the protrusion 36 is arranged. This second marker M2 serves as a mark indicating the arrangement position of the protrusion 36 on the inner peripheral surface of the coupling nut 35, and is located on the cable side opposite to the side to which the cable 41 is connected along the central axis C2. It has the shape of an arrow pointing toward the front of the connector 31.
Furthermore, a strain relief 37 that covers the outer periphery of the cable 41 is arranged at the rear of the cable-side connector 31 to which the cable 41 is connected.

FIG. 5 shows a cross-sectional structure of the coupling nut 35 cut along a plane passing through the central axis C2. The protrusion 36 is formed on the inner peripheral surface of the coupling nut 35 near the front end 35A of the coupling nut 35. This protrusion 36 has a size and shape that allows it to pass through the guide portion 27A of the groove 27 of the shell 25 of the housing-side connector 21 shown in FIG. 3 and fit into the fixing portion 27B.

When fitting the cable-side connector 31 having such a configuration to the case-side connector 21, as shown in FIG. With the central axis C2 of the cable side connector 31 positioned coaxially with the center axis C2 of the cable side connector 31, and the rotational position of the second marker M2 of the cable side connector 31 aligned with the first marker M1 of the housing side connector 21, the cable side connector 31 is aligned with the housing side connector. Pushed towards 21.

As a result, the plurality of pin contacts 22 of the case side connector 21 shown in FIG. 2 are inserted into the plurality of socket contacts 32 of the cable side connector 31 shown in FIG. The cable side connector 31 is inserted into the annular gap between the insulator 33 and the barrel 34 of the side connector 31, and the barrel 34 of the cable side connector 31 is inserted into the annular gap between the barrel 24 and the shell 25 of the housing side connector 21. The cylindrical portion 26 of the shell 25 of No. 21 is inserted into the annular gap between the barrel 34 of the cable-side connector 31 and the coupling nut 35.

Since the rotational position of the second marker M2 of the cable-side connector 31 is aligned with the first marker M1 of the housing-side connector 21, the cylindrical portion 26 of the shell 25 of the housing-side connector 21 is aligned with the barrel 34 of the cable-side connector 31. By being inserted into the annular gap between the coupling nut 35 and the coupling nut 35, the pair of protrusions 36 formed on the inner peripheral surface of the coupling nut 35 of the cable side connector 31 can be inserted into the housing side connector shown in FIG. It is inserted into the guide portion 27A of a pair of groove portions 27 formed on the outer peripheral surface of the cylindrical portion 26 of the shell 25 of No. 21.

In this state, when the cable-side connector 31 is pushed toward the housing-side connector 21 , the pair of protrusions 36 of the coupling nut 35 of the cable-side connector 31 are inserted into the guide portions of the pair of grooves 27 of the shell 25 of the housing-side connector 21 . By coming into contact with the side edge of the shell 27A, the coupling nut 35 is rotated against the elastic force received from an elastic member (not shown), and moves within the guide portion 27A to the rear of the shell 25.

When the pair of protrusions 36 of the coupling nut 35 reach the part where the groove width in the circumferential direction of the guide portion 27A of the pair of groove portions 27 is narrowest, the coupling nut 35 is moved by the elastic force received from the elastic member (not shown). By rotating, the pair of protrusions 36 fit into the fixing portions 27B of the pair of grooves 27. As a result, the pair of protrusions 36 of the coupling nut 35 cannot move in the direction of the central axis C1 with respect to the shell 25 of the housing-side connector 21.
In this way, by simply pushing the cable-side connector 31 toward the housing-side connector 21, the cable-side connector 31 is fitted into the housing-side connector 21, as shown in FIG. The fitted state of 31 is locked.

To detach the cable-side connector 31 from the housing-side connector 21, the pair of protrusions on the coupling nut 35 are rotated by rotating the coupling nut 35 of the cable-side connector 31 against the elastic force received from an elastic member (not shown). 36 from the fixing part 27B of the pair of grooves 27 of the shell 25, and in this state, the cable side connector 31 can be pulled out from the housing side connector 21.

The cable 41 is connected to the casing 12 by fitting the cable side connector 31 to the casing side connector 21, the operator grasps the teaching device 11 with both hands, and operates the plurality of operation units 14 while looking at the display 13. As a result, operations can be taught to controllers of robots, machine tools, actuators, etc. (not shown) connected to the teaching device 11 via the cable 41. In addition, when the display 13 consists of a display with a touch panel, it becomes possible to teach an operation by operating the display with a touch panel and the plurality of operation units 14.

At this time, the teaching device 11 held by both hands of the operator is moved so that, for example, the cable 41 connected via the connector assembly consisting of the housing side connector 21 and the cable side connector 31 is pulled out diagonally below the housing 12. , the housing 12 is in a posture such that the plane P2 on the −Y direction side faces downward.

Therefore, if the teaching device 11 accidentally leaves the operator's hand and falls directly downwards during the teaching operation, the teaching device 11 will move the plane P2 of the housing 12 in the -Y direction downward. It collides with the floor or the ground while in the facing position, and the case side connector 21 which is arranged diagonally at the corner of the case 12, which is the intersection of the planes P2 and P3 of the case 12, and the case side connector 21. The impact force of the fall is applied to the fitted cable side connector 31. In particular, a large impact force is applied in a direction parallel to a plane P1 perpendicular to both planes P2 and P3 of the casing 12 on which the casing-side connector 21 is arranged, that is, in a direction along the XY plane.

However, the pair of grooves 27 of the shell 25 are arranged in a plane P1 that is orthogonal to two planes P2 and P3 forming the corner of the casing 12, where the casing-side connector 21 is arranged, with respect to the central axis C1. It is arranged in the vertical direction, that is, the Z direction. Therefore, in the cylindrical part 26 of the shell 25, there is no thin part whose plate thickness is reduced due to the formation of the groove part 27 in the direction parallel to the plane P1 with respect to the central axis C1, and the predetermined thickness is reduced. Since only the thick portion is present, the shell 25 can be prevented from being damaged even if it receives a large impact force from a fall. As a result, it is possible to improve the reliability of the connection of the cable 41 to the teaching device 11 by the connector assembly A consisting of the housing side connector 21 and the cable side connector 31.

As described above, in the teaching device 11 according to the embodiment, the so-called one-touch lock type housing connector 21 that can be easily fitted with the cable side connector 31 and locked in the fitted state is attached to the housing. Even though it is disposed obliquely at the corner of the body 12, it is possible to improve the durability against the impact of a fall.

In the above embodiment, the shell 25 of the housing connector 21 and the coupling nut 35 of the cable connector 31 are made of a resin material, but they can also be made of a metal material.
However, when mating with the cable-side connector 31, the groove 27 of the shell 25 and the protrusion 36 of the coupling nut 35 are perpendicular to both of the two intersecting planes P2 and P3 of the housing 12 with respect to the central axis C1. By arranging the casing-side connector 21 at a corner of the casing 12 so that it is arranged in a direction other than parallel to the plane P1, the casing-side connector 21 and the cable-side connector 31 are made of a resin material. It can also withstand the impact of a fall. Therefore, by forming the housing-side connector 21 and the cable-side connector 31 from a resin material, it is possible to reduce the weight of the connector assembly A and the teaching device 11.

In the above embodiment, the housing side connector 21 is a receptacle connector having a shell 25, and the cable side connector 31 is a plug connector having a coupling nut 35; It is a plug connector having a ring nut, and the cable side connector 31 may be a receptacle connector having a shell.
Even in this case, when the groove part formed in the shell of the cable side connector 31 and the protrusion formed in the coupling nut of the case side connector 21 are connected, the case side connector 21 and the cable side connector 31 are connected to each other. If it is arranged in a direction other than parallel to the plane P1 which is perpendicular to the two intersecting planes P2 and P3 of the casing 11 with respect to the central axis C1 of the casing 11, it will have excellent durability against the impact of dropping. It becomes possible to realize a casing with a connector and a teaching device 11.

Further, in the above embodiment, a pair of grooves 27 are formed in the shell 25 of the housing side connector 21, and a pair of protrusions 36 are formed in the coupling nut 35 of the cable side connector 31. The number of protrusions 36 and protrusions 36 is not limited to two. Both grooves 27 and protrusions 36 are formed on both of the two intersecting planes P2 and P3 of the housing 11 with respect to the central axis C1 of the housing connector 21 when the housing connector 21 and the cable connector 31 are mated. It is also possible to have three or more grooves 27 and three or more protrusions 36 as long as they are arranged in a direction other than the direction parallel to the orthogonal plane P1.

Furthermore, the present invention is not limited to teaching devices, but can be applied to various devices having a casing with a connector in which a so-called one-touch lock type connector is disposed diagonally at a corner of the casing.

1 teaching device, 2 housing, 3 display with touch panel, 4 operation unit, 5 cable, 6 housing side connector, 7 cable side connector, 11 teaching device, 12 housing, 13 display, 14 operation unit, 21 housing side connector ( connector), 22 pin contact, 23, 33 insulator, 24, 34 barrel, 25 shell, 26 cylindrical part, 26A front end, 27 groove, 27A guide part, 27B fixed part, 28 shell main body, 31 cable side connector (mating side connector), 32 socket contact, 35 coupling nut, 35A front end, 36 protrusion, 37 strain relief, 41 cable, A connector assembly, P1, P2, P3 plane, C1, C2 central axis, M1 first marker , M2 second marker.

Claims (6)

a casing having an approximately rectangular parallelepiped outer shape;
a display and an operation unit arranged on one of six sides of the casing forming the rectangular parallelepiped;
The connector is disposed at an intersection of two surfaces that are perpendicular to one of the six surfaces of the housing and intersect with each other, and is fitted into a mating connector along a central axis that extends obliquely to the two surfaces. Equipped with a matching connector and
One of the connector and the mating connector has a groove formed in the outer peripheral surface of a cylindrical shell surrounding the central axis, and the other of the connector and the mating connector a coupling nut having a protrusion formed on the inner circumferential surface of the coupling nut that is arranged to surround the outer circumferential surface of the shell when the shell is fitted with the shell, and that fits into the groove;
The teaching device , wherein the groove portion or the protrusion of the connector is arranged on the central axis in a direction other than a direction parallel to a plane perpendicular to both of the two intersecting planes. The teaching device according to claim 1, wherein the groove portion or the protrusion of the connector is arranged in a direction perpendicular to a plane perpendicular to both of the two intersecting planes with respect to the central axis. 3. The teaching device according to claim 1, wherein the connector has two grooves or two protrusions arranged on both sides of the central axis with the central axis in between. The teaching device according to any one of claims 1 to 3, wherein the shell and the coupling nut are made of a resin material. When the connector and the mating connector are fitted, the groove portion is arranged so as to be parallel to a plane perpendicular to both of the two intersecting planes and not to intersect with a plane passing through the central axis. The teaching device according to any one of claims 1 to 4. The groove portion includes a guide portion that guides insertion of the protrusion when the connector and the mating connector are fitted together, and a fixing portion that is connected to the guide portion and fixes the position of the protrusion.
The guide portion is open at a front end of the shell facing the mating connector along the central axis, and has a groove width in a circumferential direction from the front end toward the rear end of the shell along the central axis. has a narrow shape,
The teaching device according to claim 5, wherein the fixing portion is connected to a portion of the guide portion where the groove width in the circumferential direction is narrowest.