JP2008186670A - Electric connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connector 10 which is hard to be caught by fences or the like surrounding industrial equipment, electronic and/or electric equipment or the like, also leads to increase in a retaining force, and does not lead to connection failure, even when a cable 40 is pulled. <P>SOLUTION: The electric connector is equipped with a plurality of contacts 14, an insulator 12, a plug shell 16, a coupling ring 20, a back shell 18, a coupling 22, a cable clamp 24, and a clamp nut 26. Two cover members 50 have an installing part 501 of the clamp nut 26 and a cable insertion part 502 into which the cable 40 is installed continuously with the installing part 501, and are provided with a tapering part 504 on the outer periphery of a cable projection side, or at least one convex part 505 on the cable insertion part 502, or both of the tapering part 504 and the convex part 505 thereon whereby, two cover members 50 are installed on the cable protruding side by an installing means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrical connector with a cable used for industrial equipment, electronic / electrical equipment, and the like, and more particularly to a structure for preventing the catching at the time of use and enhancing the holding power of the cable.

A conventional electrical connector will be described. The electrical connector includes at least a plurality of contacts connected to the cable, an insulator in which the contacts are arranged and held, a plug shell that holds the insulator and has a coupling ring holding means, and a mating connector engaging means. A back shell having a coupling ring having an insertion portion into which the plug shell is inserted and having means for attaching a coupling and a clamp nut, a coupling for fixing the back shell and the plug shell, and a cable for holding the cable A clamp nut for holding the cable by the cable clamp by being attached to the clamp and the back shell is provided. The said cable is hold | maintained by the structure like the patent document 1 shown below. The clamp nut has a substantially U-shaped cross section.
As an electrical connector with a cable, Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-340235) and Patent Document 2 (Japanese Patent Application No. 2005-297219) proposed by the present applicant will be exemplified.
According to the summary of Japanese Patent Application Laid-Open No. 2002-340235 of Patent Document 1, the cable is inserted in the axial direction of the clamp body and the cylindrical rubber bushing and the clamp ring for the purpose of improving the waterproof effect of the waterproof cable clamp. After that, the waterproof cable clamp is assembled by screwing the clamp nut into the clamp body from the outside of the clamp ring, and the tip of the comb blade of the clamp ring is bent inward, and the tip is inserted through the clamp ring. Press the peripheral surface of the cable, and rotate the back shell (connection protection cover) connected to the other end of the clamp body by a predetermined angle (for example, 45 degrees) with respect to the clamp body about the axis of the body. A connector having a holding structure is disclosed. According to the summary of Japanese Patent Application No. 2005-297219 of Patent Document 2, the front insert does not come off or be damaged even when it is struck with the mating object, and the backlash and strength of the two couplings The purpose is to provide a round connector with no shortage, with a plurality of contacts, a front insert, a rear insert, a substantially cylindrical shell, a substantially cylindrical front coupling, and a substantially cylindrical shape. Provided with a rear coupling and a substantially cylindrical back shell, the front insert has a taper at the mating side tip, and the front coupling has a protruding part that projects to the opposite side of the mating port. A circular connector having a structure in which an extending portion having a substantially L-shaped cross section protruding in the abutment direction is provided so that the protruding portion and the extending portion wrap is opened. It is.

In an electrical connector with a cable used for industrial equipment, electronic / electrical equipment, etc., it is often seen that an operator holds the cable and pulls it by hand. In addition, the surroundings of industrial equipment, electronic / electrical equipment, and the like often surround industrial equipment, electronic / electrical equipment, etc. with a fence or the like in order to avoid danger to workers. With the shape of the clamp nut as shown in the prior art of Patent Document 1 and Patent Document 2 described above, when the cable is pulled, there is a risk of being caught by a fence or the like surrounding industrial equipment, electronic / electric equipment, etc. There is a problem that the cable is disconnected and leads to poor connection.
For this reason, there is an increasing demand for a holding force that prevents the cable from being pulled out even if it is caught.

  The present invention has been made in view of such a conventional problem. Even when the cable is pulled, it is difficult to be caught by a fence or the like surrounding industrial equipment, electronic / electric equipment, etc. It is intended to provide an electrical connector that does not lead to poor connection due to increased force.

  The above object is an electrical connector that is attached to and detached from the mating connector, and includes a plurality of contacts 14 that are connected to the cable 40, an insulator 12 in which the contacts 14 are arranged and held, and an engaging means for the mating connector. A coupling shell 20 having the insulator 12 and holding means for holding the coupling ring 20, a back shell 18 having an insertion portion 184 into which the plug shell 16 is inserted, and the back shell. 18 and a coupling 22 having a mounting means for fixing the plug shell 16, a cable clamp 24 for holding the cable 40, and a mounting means for the back shell 18 and mounting to the back shell 18. By the cable clamp 24 and the cable An electrical connector including a clamp nut 26 that holds 0, a mounting portion 501 of the clamp nut 26, a cable insertion portion 502 into which the cable 40 connected to the mounting portion 501 is inserted, This can be achieved by mounting the two cover members 50 provided with the tapered portion 504 on the outer periphery to the cable protruding side by the mounting means.

  The above object is also an electrical connector that is attached to and detached from the mating connector, and includes a plurality of contacts 14 that are connected to the cable 40, an insulator 12 in which the contacts 14 are arranged and held, and engagement with the mating connector. A coupling ring 20 having means, a plug shell 16 holding the insulator 12 and holding means for the coupling ring 20, a back shell 18 having an insertion portion 184 into which the plug shell 16 is inserted, A coupling 22 having attachment means for fixing the back shell 18 and the plug shell 16, a cable clamp 24 for holding the cable 40, and attachment means for the back shell 18 and attaching to the back shell 18. The cable clamp 24 and the cable An electric connector including a clamp nut 26 for holding a bull 40, and having a mounting portion 501 for the clamp nut 26 and a cable insertion portion 502 for receiving the cable 40 connected to the mounting portion 501. This can also be achieved by mounting two cover members 50 provided with at least one convex portion 505 on the portion 502 on the cable protruding side by mounting means.

The electrical connector according to claim 3 is the electrical connector according to claim 1, wherein at least one convex portion 505 is provided in the cable insertion portion 502 of each cover member 50.
Further, the electrical connector 10 according to claim 4 is characterized in that the two cover members 50 are provided with tapered portions 504 on the outer periphery of the cable protruding side.
Furthermore, the electrical connector 10 according to claim 5 is the electrical connector according to claim 1, 3, or 4, wherein the angle of the tapered portion 504 is set to 5 to 45 degrees.
The electrical connector according to claim 6 is an electrical connector according to claim 3 or 4, wherein the cover member 50 has an engaging recess 503 that engages with the back shell 18.
Further, in the electrical connector 10 according to claim 7, the interval between the convex portions 505 of the two cover members 50 is 3.0 to 4 from the diameter of the cable 40 in a state where the two cover members 50 are mounted. 4. The electrical connector according to claim 2, wherein the electrical connector is reduced by 0.0 mm.

As is clear from the above description, according to the electrical connector 10 connected to the cable 40, the following excellent remarkable effects can be obtained.
(1) The electrical connector 10 according to claim 1 is an electrical connector to be attached to and detached from the mating connector, and a plurality of contacts 14 connected to the cable 40, an insulator 12 in which the contacts 14 are arranged and held, A coupling ring 20 having an engaging means with the mating connector, a plug shell 16 having a holding means for holding the insulator 12 and holding the coupling ring 20, and an insertion portion 184 into which the plug shell 16 is inserted. A back shell 18 having coupling, a coupling 22 having mounting means for fixing the back shell 18 and the plug shell 16, a cable clamp 24 for holding the cable 40, and mounting means for the back shell 18. Together with the cable by attaching it to the back shell 18 The electrical connector including the clamp nut 26 that holds the cable 40 with the lamp 24 includes a mounting portion 501 of the clamp nut 26 and a cable insertion portion 502 into which the cable 40 connected to the mounting portion 501 is inserted. Since the electric connector 10 is characterized in that the two cover members 50 provided with the taper portion 504 on the outer periphery on the cable protruding side are mounted on the cable protruding side by mounting means, the cable 40 is pulled. However, the cable 40 is not easily caught by a fence surrounding industrial equipment, electronic / electrical equipment, and the like, and the cable 40 is not pulled out, resulting in poor connection.
(2) The electrical connector 10 according to claim 2 is an electrical connector to be attached to and detached from the mating connector, and a plurality of contacts 14 connected to the cable 40, an insulator 12 in which the contacts 14 are arranged and held, A coupling ring 20 having an engaging means with the mating connector, a plug shell 16 having a holding means for holding the insulator 12 and holding the coupling ring 20, and an insertion portion 184 into which the plug shell 16 is inserted. A back shell 18 having coupling, a coupling 22 having mounting means for fixing the back shell 18 and the plug shell 16, a cable clamp 24 for holding the cable 40, and mounting means for the back shell 18. Together with the cable by attaching it to the back shell 18 The electrical connector including the clamp nut 26 that holds the cable 40 with the lamp 24 includes a mounting portion 501 of the clamp nut 26 and a cable insertion portion 502 into which the cable 40 connected to the mounting portion 501 is inserted. Then, since the electric connector 10 is characterized in that the two cover members 50 provided with at least one convex portion 505 in the cable insertion portion 502 are mounted on the cable protruding side by the mounting means. The holding force is increased, the cable 40 is not pulled out, and connection failure is not caused.
(3) The electrical connector 10 according to claim 3 is characterized in that at least one convex portion 505 is provided in the cable insertion portion 502 of each of the cover members 50. Therefore, even if the cable 40 is pulled, it is difficult to be caught by a fence surrounding industrial equipment, electronic / electrical equipment, etc., and the holding power of the cable 40 is increased, so that the cable 40 does not come off. Does not lead to poor connection.
(4) Since the electrical connector 10 according to claim 4 is the electrical connector 10 according to claim 2, characterized in that the two cover members 50 are provided with tapered portions 504 on the outer periphery of the cable protruding side. Even if the cable 40 is pulled, it is difficult to be caught by a fence surrounding industrial equipment, electronic / electrical equipment, etc., and the holding power of the cable 40 is increased, so that the cable 40 does not come off and is connected. Does not lead to defects.
(5) The electrical connector 10 according to claim 5 is characterized in that the angle of the taper portion 504 is set to 5 to 45 degrees. Even if 40 is pulled, it does not get caught in the surrounding fence or the like.
(6) The electrical connector 10 according to claim 6 is characterized in that the cover member 50 has an engaging recess 503 that engages with the back shell 18. Therefore, each of the cover members 50 can reliably hold the clamp nut 26 and the back shell 18, and the holding power of the cable 40 is increased, so that the cable 40 is not pulled out, resulting in poor connection. Absent.
(7) In the electrical connector 10 according to claim 7, the interval between the convex portions 505 of the two cover members 50 is 3.0 to less than the diameter of the cable 40 in a state where the two cover members 50 are mounted. The electrical connector 10 according to claim 2 or 3, characterized in that the cable 40 is not pulled out even if the cable 40 is pulled and hooked on a surrounding fence or the like. A holding force of 100 N or more can be secured.

An embodiment of the electrical connector of the present invention will be described with reference to FIGS. 1A is a perspective view of the electrical connector of the present invention as seen from the fitting direction, and FIG. 1B is a perspective view of the electrical connector of the present invention as seen from the cable protruding direction. FIG. 2 is a perspective view of the two cover members in an exploded state. FIG. 3 is a cross-sectional view of the electrical connector of the present invention. FIG. 4A is a perspective view of a cable clamp, and FIG. 4B is a perspective view of a clamp nut. FIG. 5A is a perspective view of the electrical connector with the cable clamp portion removed and the back shell inserted into the cable, and FIG. 5B is the insert with the contact attached and the ground plate attached. FIG. FIG. 6 is a cross-sectional view of the electrical connector of the present invention in the absence of contacts and inserts. FIG. 7 is a cross-sectional view of another electrical connector of the present invention. FIG. 8A is a perspective view of another electrical connector with the cable clamp portion removed and the back shell inserted into the cable, and FIG. 8B is a state in which contacts are attached and a ground plate is attached. It is a perspective view of the front and rear inserts.
The electrical connector 10 of the present invention includes at least a plurality of contacts 14, an insert 12, a plug shell 16, a back shell 18, a coupling ring 20, a coupling 22, a cable clamp 24, a clamp nut 26, and two cover members 50. ing.

The components of the electrical connector 10 according to the present invention will be described with reference to FIGS.
First, the cover member 50 which is the point of the present invention will be described. As shown in FIG. 2, there are two cover members 50, and the back shell 18, the clamp nut 26, and the cable 40 are sandwiched between the two cover members 50. The two cover members 50 are fixed by bolts and nuts as mounting means. The cover member 50 is an electrically insulating plastic, and is manufactured by a well-known injection molding. The material of the cover member 50 is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene is used. Examples thereof include terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof. The cover member 50 has at least a cable insertion portion 502 into which the cable 40 is inserted, a mounting portion 501 into which the clamp nut 26 is inserted, and an engagement recess 503 that engages with the back shell 18.

  When the two cover members 50 are engaged, the respective cable insertion portions 502, mounting portions 501 and engagement recesses 503 form spaces in which the respective cables 40, the clamp nuts 26, and the back shell 18 enter. is doing. The shape and size of each cable insertion portion 502, mounting portion 501, and engagement recess 503 may be as long as the cable 40, the clamp nut 26, and the back shell 18 can be inserted. The nut 26 and the back shell 18 are appropriately designed in consideration of the size, holding force, dimensional stability, workability, and the like.

In order to prevent the cable 40 from being pulled out during handling, the cover member 50 is provided with a tapered portion 504 on the outer periphery of the protruding side of the cable 40 or at least one convex portion on the cable insertion portion 502. A portion 505 is provided, or both the tapered portion 504 and the convex portion 505 are provided. In this embodiment, both the tapered portion 504 and the convex portion 505 are provided. The taper portion 504 is for preventing the taper portion 504 from being caught by a fence or the like surrounding industrial equipment, electronic / electric equipment, and the like when the cable 40 is pulled by an operator. The convex portion 505 increases the holding force by sandwiching the cable 40 with the convex portions 505 of both the cover members 50 separately from the cable clamp 24. The size and shape of the tapered portion 504 are appropriately designed in consideration of the above role, workability, strength, and the like. The size and shape of the convex portion 505 are appropriately designed in consideration of the above role, holding force, workability, and the like. The number of the convex portions 505 is appropriately designed in consideration of the holding force, but in the present embodiment, two are provided so as to face each of the cover members 50. The angle of the tapered portion 504 is set to 5 to 45 degrees. If it exceeds 45 degrees, the cable 40 is easily caught. Considering that it is difficult to catch and the strength, ideally, the angle of the tapered portion 504 is desirably 10 to 30 degrees.
Further, the interval between the convex portions 505 of the two cover members 50 is 3.0 to 4.0 mm smaller than the diameter of the cable 40 in a state where the two cover members 50 are mounted. If it is 3.0 mm or less, a holding force of 100 N or more cannot be secured, and if it is 4.0 mm or more, the cable 40 is damaged.

  Next, the contact 14 will be described. The contact 14 is made of metal and is manufactured by a known press working. Since the material of the contact 14 is required to have dimensional stability, electrical conductivity, etc., examples thereof include brass, beryllium copper, and phosphor bronze. The contact 14 mainly has a contact portion 141 that contacts the mating connector, a fixing portion 142 held by the insert 12, and a connection portion 143 connected to the cable. The contact 14 has a substantially cylindrical shape, and the contact portion 141 has a cylindrical shape so as to enter the contact of the mating connector, and the size of the contact 14 is appropriately set so as to enter the mating contact and obtain stable contact. Designing. The fixing portion 142 is held on the insert 12 by a hook (lance 142) as shown in FIG. The shape and size of the lance that is the fixing portion 142 are appropriately designed in consideration of holding force, workability, miniaturization of the electrical connector 10, and the like. The connecting portion 143 is a portion connected to a cable, and the shape of the connecting portion 143 is appropriately designed in consideration of specifications, objects to be connected, a connecting method, and the like. In this embodiment, the cable 40 is connected by clamping (crimping).

  Next, the insert 12 will be described. FIG. 3 is a drawing in which only one contact 14 is not inserted (attached) in order to easily understand the shape of the hole into which the contact 14 is inserted. The insert 12 is an electrically insulating plastic and is manufactured by a known technique of injection molding. The material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene terephthalate is used. (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof. The insert 12 has an insertion hole 121 into which the contact 14 is inserted. The insertion hole 121 only needs to hold the contact 14, and the size and shape are appropriately designed in consideration of the size and shape of the contact 14. On the fitting side of the insert 12, a key groove 123 for positioning with the mating connector is provided as shown in FIG. The key groove 123 is appropriately designed so that the predetermined contact 14 and the contact of the mating connector can be connected. Further, an engagement convex portion 122 with which the lance 142 of the contact 14 is engaged (hooked) is provided at substantially the center of the insertion hole 121 as shown in FIG. The size and shape of the engaging projection 122 need only be able to hold the contact 14 and are appropriately designed in consideration of holding force, workability, and the like.

Next, the plug shell 16 will be described. The plug shell 16 is made of metal and is manufactured by a known technique such as cutting or die casting, and the material is appropriately selected in consideration of dimensional stability, workability, cost, etc. A zinc alloy, an aluminum alloy, etc. can be mentioned.
The plug shell 16 has a substantially cylindrical shape, and an insertion hole 161 into which the insert 12 is inserted is formed inside thereof. The insertion hole 161 only needs to be inserted into the insert 12, and is appropriately designed in consideration of the size, workability, strength, and the like of the insert. The insert 12 and the plug shell 16 form a fitting port 11 into which a mating connector is inserted. A key groove 164 for positioning with the mating connector is provided at a predetermined position on the outer periphery of the plug shell 16 on the fitting side. A holding means for holding the coupling ring 20 is provided on the outer periphery of the shell 16. As the holding means, a concave portion 162 is provided at a predetermined position on the outer periphery of the shell 18, a retainer ring 38 is inserted into the concave portion 162, and the retainer ring 38 and the end surface 163 of the plug shell 16 are further interposed. The spring member 39 and the coupling ring 20 are inserted to hold the coupling ring 20. In this case, the retainer ring 38 is held so that the coupling ring 20 rotates by a certain angle. The plug shell 16 is provided with an O-ring 32 in order to enhance the waterproof property with the back shell 18, and further in the vicinity of the mating side in order to enhance the waterproof property with the counterpart. Is arranged.

Next, the coupling ring 20 will be described. The coupling ring 20 is made of metal and is manufactured by a known technique such as cutting or die casting, and the material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Can include zinc alloys and aluminum alloys.
The coupling ring 20 has a substantially cylindrical shape, and the coupling ring 20 is provided with an insertion hole 201 into which the plug shell 16 is inserted. The coupling ring 20 is held by the plug shell 16 so as to rotate by a predetermined angle by the method described above. A plurality of engaging projections 202 are provided inside the insertion hole 201. As the means for engaging with the mating connector, the engaging convex portion 202 is inserted into a substantially R-shaped concave portion provided in the shell of the mating connector, and the elastic force of the spring member 39 engages with the mating connector. This is a so-called one-touch lock.

  Next, the coupling 22 will be described. The coupling 22 is made of metal and is manufactured by a known technique such as cutting or die casting. The material is appropriately selected in consideration of dimensional stability, workability, cost, etc. A zinc alloy, an aluminum alloy, etc. can be mentioned. The coupling 22 has a substantially cylindrical shape, and the coupling 22 is provided with an insertion hole 221 into which the plug shell 16 is inserted. On the inner peripheral surface of the insertion hole 221, there is a female screw portion 222 that is screwed to the back shell 18 as means for mounting to the back shell 18. That is, the coupling 22 is screwed to the back shell 18, and the plug shell 16 is sandwiched between the coupling 22 and the back shell 18. By doing so, the back shell 18 and the plug shell 16 are fixed.

  Next, the back shell 18 will be described. The back shell 18 is made of metal and is manufactured by a known technique such as cutting or die casting, and the material is appropriately selected in consideration of dimensional stability, workability, cost, etc. A zinc alloy, an aluminum alloy, etc. can be mentioned. The back shell 18 has a substantially cylindrical shape and has a through hole 181 into which a cable is inserted. An insertion portion 184 into which the plug shell 16 is inserted is provided in the through hole 181 in the direction of the plug shell 16. The insertion portion 184 only needs to contain the plug shell 16 and is appropriately designed in consideration of the size, strength, workability, and the like of the plug shell 16. Male screw portions 182 and 182 are provided at both ends of the back shell 18 as means for mounting the coupling 22 and the clamp nut 26. Engaging recesses 183 and 183 for preventing the cable clamp 24 and the plug shell 16 from rotating are provided at both ends of the back shell 18.

  Next, the cable clamp 24 will be described. The cable clamp 24 is an electrically insulating plastic, and is manufactured by a known technique of injection molding. This material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene is used. Examples thereof include terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof. The cable clamp 24 is for holding the cable 40 by screwing the clamp nut 26 to the back shell 18. The cable clamp 24 has a substantially cylindrical shape and has a hole into which the cable 40 is inserted. The holes are appropriately designed in consideration of strength and workability so that the cable 40 can be inserted. The cable clamp 24 is provided with a recess 243 on the side in contact with the back shell 18, and a plurality of comb blades 242 having a substantially square shape on the side in contact with the clamp nut 26. The recess 243 engages with the engagement recess 183 of the back shell 18 to stop the rotation of the cable clamp 24, and the comb blade 242 has a bent portion at the pressing portion 263 of the clamp nut 26. Is for holding the cable 40 by pushing in the direction of the cable 40. For this role, a slit is provided between the comb wings 242 to provide elasticity, and a tip protrusion 244 is provided at the tip of the comb wing 242 to improve the biting property to the cable. Yes. The shape and size of the comb feather 242 are appropriately designed in consideration of the above role, elasticity, holding power of the cable 40, workability, and the like.

  Finally, the clamp nut 26 will be described. The clamp nut 26 is made of metal and is manufactured by a known technique such as cutting or die casting, and the material is appropriately selected in consideration of dimensional stability, workability, cost, etc. A zinc alloy, an aluminum alloy, etc. can be mentioned. The clamp nut 26 has a substantially cylindrical shape and has a fitting hole 261 into which the cable 40 is inserted. On the inner periphery of the fitting hole 261, a female thread portion 262 for screwing with the back shell 18 is provided as a mounting means with the back shell 18, and the cable clamp 24 is pressed. A pressing portion 263 for holding the cable 40 is provided. The pressing portion 263 only needs to press the comb wings 242 of the cable clamp 24 and hold the cable 40, and is appropriately designed in consideration of the holding force and workability of the cable 40.

  In this embodiment, a bushing 36, a ground plate 34, an O-ring 32, a retainer ring 38, a spring member 39, and a set screw are provided in addition to the above-described parts. The O-ring 32, the retainer ring 38, and the spring member 39 are as described above. The ground plate 34 is disposed between a predetermined position of the insert 12 and the plug shell 16, and one end of the ground plate 34 is connected to the cable 40, thereby grounding the cable 40 and the plug shell 16. Is taken. The bushing 36 is disposed on the inner side of the cable clamp 24 so as to be in close contact with the cable 40 to enhance waterproofness. The set screw is used to prevent rotation after the coupling 22 and the clamp nut 26 are mounted. A female screw portion is provided at a predetermined position of the coupling 22 and the clamp nut 26. It is screwed.

  Another embodiment will be described with reference to FIGS. The difference from the above-described embodiment is that a socket type contact 15 is used in place of the pin type contact 14, and two inserts are used instead of the insert 12 by using the contact 15. (The front insert 28 and the rear insert 30). Only the changed part will be described below.

  First, the contact 15 will be described. This contact 15 is made of metal, and is manufactured by a known press working. Since the material of the contact 15 is required to have dimensional stability, conductivity, etc., examples thereof include brass, beryllium copper, and phosphor bronze. The contact 15 mainly has a contact portion 151 that contacts the mating connector, a fixing portion 152 held by the rear insert 30, and a connection portion 153 connected to the cable. The contact 15 has a substantially cylindrical shape, and the contact portion 151 has a cylindrical shape so that the contact of the mating connector can enter, and the size of the contact 15 is appropriately set so that a stable contact can be obtained with the mating contact. Designing. The fixing portion 152 is held by the rear insert 30 by a hook (lance) as shown in FIG. The shape and size of the lance that is the fixing portion 152 are appropriately designed in consideration of holding force, workability, miniaturization of the electrical connector 10, and the like. The connecting portion 153 is a portion connected to a cable, and the shape of the connecting portion 153 is appropriately designed in consideration of specifications, objects to be connected, connection method, and the like.

Next, the front insert 28 will be described. FIG. 7 is a drawing in which only one contact 15 is not inserted (attached) in order to easily understand the shape of the hole into which the contact 15 is inserted. The front insert 28 is an electrically insulating plastic, and is manufactured by a well-known injection molding. This material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene is used. Examples thereof include terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof. The front insert 28 has an insertion hole 281 into which the contact of the mating connector is inserted, and an insertion hole 282 into which the contact 15 is inserted. The size and shape of the insertion hole 281 need only be able to fit the mating contact, and are appropriately designed in consideration of the size of the mating contact, the strength of the front insert 28, and the like. A chamfer 283 is provided on the side where the mating contact is inserted so as to facilitate insertion.
The insertion hole 282 only needs to enter the tip of the contact 15, and the size and shape are appropriately designed in consideration of the size and shape of the contact 15. The insertion hole 282 and the insertion hole 281 communicate with each other.

Finally, the rear insert 30 will be described. FIG. 7 is a drawing in which only one contact 15 is not inserted (attached) in order to easily understand the shape of the hole into which the contact 15 is inserted. The rear insert 30 is an electrically insulating plastic, which is manufactured by a well-known injection molding method. This material is appropriately selected in consideration of dimensional stability, workability, cost, etc. Generally, polybutylene is used. Examples thereof include terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), and synthetic materials thereof.
The rear insert 30 is provided with a mounting hole 301 into which the contact 15 is inserted, and an engagement convex portion 302 that is engaged with the lance 152 of the contact 15 is provided at a predetermined position in the mounting hole 301. ing. The shape and size of the mounting hole 301 may be designed as long as the contact 15 can be inserted, and is appropriately designed in consideration of the miniaturization of the electrical connector 10 according to the contact 15. The position of the engaging protrusion 302 is appropriately designed so that it can engage with the lance 152 of the contact 15. The lance 152 and the engaging projection 302 are appropriately designed so as to satisfy the holding force of the contact 15.

  The structure of the electrical connector with a cable using the two cover members 50 as described above can be used for any structure as long as it has the cable clamp 24 and the clamp nut 26.

  As an application example of the present invention, the present invention is applied to an electrical connector with a cable used for industrial equipment, electronic / electrical equipment, and the like, and particularly relates to a structure for preventing catching at the time of use and enhancing the holding power of the cable.

(A) It is the perspective view which looked at the electrical connector of this invention from the fitting port direction. (B) It is the perspective view which looked at the electrical connector of this invention from the cable protrusion direction. It is a perspective view in the state where two cover members were disassembled from the electric connector of the present invention. It is a cross-sectional view of the electrical connector of the present invention. (A) It is a perspective view of a cable clamp. (B) It is a perspective view of a clamp nut. (A) It is a perspective view of an electric connector in the state where a portion of a cable clamp part was removed and a back shell was inserted in a cable. (B) It is a perspective view of an insert with a contact attached and a ground plate attached. It is a cross-sectional view of the electrical connector of the present invention in the state without contacts and inserts. It is a cross-sectional view of another electrical connector of the present invention. (A) It is a perspective view of another electric connector in the state where the part of the cable clamp part was removed and the back shell was inserted in the cable. (B) It is a perspective view of the front and rear insert of the state where the contact was attached and the earth plate was attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connector 11 Fitting port 12 Insert 121 Insertion hole 122,302 Engaging convex part 123 Key groove 14 Contact (pin type)
15 Contact (Socket type)
141, 151 Contact part 142, 152 Fixing part 143, 153 Connection part 16 Plug shell 161 Insertion hole 162 Recess 163 End face 164 Key groove 18 Back shell 181 Through hole 182 Male thread part 183 Engaging recess 184 Insertion part 20 Coupling ring 201 Insertion hole 202 Engagement convex part 22 Coupling 221 Insertion hole 222 Female screw part 24 Cable clamp 241 Ring 242 Comb 243 Recess 244 Tip protrusion 26 Clamp nut 261 Insertion hole 262 Female screw part 263 Press part 28 Front insert 281 Insertion Hole 282 Insertion hole 283 Chamfer 30 Rear insert 301 Mounting hole 32 O-ring 34 Ground plate 36 Bushing 38 Retainer ring 39 Spring member 40 Cable 50 Cover member 501 Mounting portion 502 Cable Insertion portion 503 engaging the recess 504 a tapered section 505 protrusions

Claims (7)

An electrical connector to be attached to and detached from the mating connector,
A plurality of contacts connected to the cable;
An insulator in which the contacts are arranged and held;
A coupling ring having engagement means with the mating connector;
A plug shell holding the insulator and having a holding means with the coupling ring;
A back shell having an insertion portion for receiving the plug shell;
A coupling having mounting means for fixing the back shell and the plug shell;
A cable clamp for holding the cable;
In an electrical connector having a mounting nut and a clamp nut for holding the cable with the cable clamp by mounting on the back shell,
A means for attaching two cover members having a cable insertion portion for receiving the cable connected to the attachment portion and having a mounting portion for the clamp nut and having a tapered portion on the outer periphery of the cable protrusion side to the cable protrusion side Electrical connector characterized by being attached by An electrical connector to be attached to and detached from the mating connector,
A plurality of contacts connected to the cable;
An insulator in which the contacts are arranged and held;
A coupling ring having engagement means with the mating connector;
A plug shell holding the insulator and having a holding means with the coupling ring;
A back shell having an insertion portion for receiving the plug shell;
A coupling having mounting means for fixing the back shell and the plug shell;
A cable clamp for holding the cable;
In an electrical connector having a mounting nut and a clamp nut for holding the cable with the cable clamp by mounting on the back shell,
Two cover members having a mounting portion for the clamp nut and a cable insertion portion for receiving the cable connected to the mounting portion and having at least one convex portion on the cable insertion portion are provided on the cable protruding side. An electrical connector that is mounted by a mounting means. The electrical connector according to claim 1, wherein at least one convex portion is provided in the cable insertion portion of each cover member. The electrical connector according to claim 2, wherein the two cover members are provided with a tapered portion on an outer periphery of the cable protruding side. 5. The electrical connector according to claim 1, wherein an angle of the tapered portion is set to 5 to 45 degrees. The electrical connector according to claim 3, wherein the cover member has an engagement recess that engages with the back shell. The distance between the convex portions of the two cover members is set to be 3.0 to 4.0 mm smaller than the diameter of the cable in a state where the two cover members are mounted. Electrical connector.

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