JP6626999B1 - connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector capable of further reducing a dimension in a radial direction (up and down and right and left directions in FIG. 1A). A connector (P) in which a contact (21) for obtaining electrical connection is accommodated in a casing (29) and has a packing groove (29f) formed in a casing end face (29b) abutting against a mating face (100b). In the portion where the bolt 49 exists, the packing groove 29f is depressed inward, and in the portion where the bolt 49 does not exist, the packing groove 29f protrudes toward the peripheral portion. Reduce the external dimensions of the connector while ensuring the necessary sealing area. [Selection diagram] Fig. 1

Description

  The present invention relates to a connector for connecting an electric wire and the like. In particular, the present invention relates to a connector excellent in waterproofness, vibration resistance, shock resistance, durability, reliability, and the like, which can be used in harsh outdoor environments such as a railway signal system.

 In a train on-rail detection system and a point switching confirmation system of a railway, an energizing line for passing a signal current of a track circuit is connected to a rail. Such electric wire connectors directly connected to railway rails are required to have vibration resistance, impact resistance and waterproofness. High reliability is also essential for high-speed and public transportation security signaling equipment.

  The present applicant has developed a vibration-proof connector disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-169781). The connector C shown in FIGS. 4 and 5 is installed in an adhesive illuminator as an example of signal and security equipment of a high-speed railway. The adhesion checker is a device that confirms the completion of the orbit switching at the orbit switching point. In these drawings, the reference numerals and names of the components and parts are different from those in Patent Document 1.

FIG. 4 is a side sectional view of the vibration-proof connector shown in FIG. The plug P and the receptacle R are separated.
FIG. 5 is a side sectional view of the vibration-proof connector shown in FIG. 4 in a state where the plug P and the receptacle R are combined.

  In FIG. 4, on the left side, a connector mounting panel 100 of an illuminator (not shown) is shown in a vertically extending strip shape. The receptacle R of the connector C is attached to the panel 100. The receptacle R includes a male contact (conductive pin) 101 and a pin insulator 105 for holding the male contact (conductive pin). The pin insulator 105 is fixed to the panel 100 with fixing screws 108. A waterproof packing 109 is interposed between the pin insulator 105 and the panel 100.

  The plug P is shown on the right side of FIG. The plug P includes a female contact 121, a socket insulator 125 for holding the female contact 121, a main body cover 129 containing them, and the like. The lower part inside the main body cover 129 accommodates the cable strand 141 connected to the right end of the female contact 121 and the end of the cable 143. A cable packing 145 is provided on the outer periphery of the cable 143.

The cable strand 141 is bent 90 degrees in an L-shape within the main body cover 129. That is, the cable 143 enters the body cover 129 at right angles to the connection axis (normally horizontal) of the connector from below in the figure. This is for minimizing the protrusion size of the connector (plug P) from the illuminator because the space for mounting the connector on the adhesive illuminator is limited. Also, it is for suppressing resonance due to vibration.

On the left end surface of the main body cover 129, a packing 133 for sealing between the panel 100 and the main body cover 129 is arranged. The main body cover 129 is fixed to the mounting panel 100 with fastening bolts 149 shown in FIG. The body cover 129 is filled with a resin 138. The packings 109 and 133 also have the function of absorbing vibration and impact from the illuminator.

  FIG. 5 shows a state where the plug P is inserted into the receptacle R. In this state, the male contact 101 of the receptacle R enters the inner hole of the female contact 121 of the plug P, and both are conductive. At the same time, the left portion of the socket insulator 125 of the plug P fits into the inner recess of the pin insulator 105 of the receptacle R.

JP 2004-169781 A

  An object of the present invention is to provide a connector that can have a smaller dimension in the radial direction (up, down, left, and right directions in FIG. 1A) than the connector of Patent Document 1. Accordingly, it is an object to provide a connector in which the mass and the moment of inertia of the connector are reduced, the inertial load accompanying vibration is reduced, and the vibration resistance is further improved.

  In the “Means for Solving the Problems” and the “Claims”, reference numerals in parentheses in the attached drawings are shown in parentheses, but this is for reference only, and the scope of rights is attached. It is not intended to be limited to those shown.

The connector according to the present invention is a connector (P) in which a contact (21) for obtaining electrical connection is housed in a casing (29), the end face (29b) of the casing (29) being brought into contact with a mating surface (100b). ), A packing groove (29f) for holding an annular packing (33), and in a portion where a fastening member (49) that abuts the end surface (29b) against a mating surface exists, the packing groove (29) is provided. 29f) is recessed near the center of the sealing area inside the annular packing (33), and in the portion where the fastening member (49) does not exist, the packing groove (29f) is located near the periphery of the sealing area. Overhanging.
The packing groove of the present invention is formed in one of the two surfaces (29b) for holding an annular packing (33) that seals a sealing area between the two surfaces (29b, 100b) to be abutted. In the packing groove (29f), where the fastening member (49) that abuts the two surfaces (29b, 100b) is present, the packing groove (29f) is depressed toward the center of the seal area. In a portion where the fastening member (49) does not exist, the packing groove (29f) protrudes toward a peripheral portion of the seal region.
Suitable devices provided with such packing grooves are, for example, electrical connectors, high-frequency / coaxial connectors, optical connectors, modular type connectors, and the like.

  If a fastening member (49, bolt, etc.) is provided outside the circular packing groove, the external dimensions of the member forming the packing groove, such as the connector casing (29, body cover), increase. On the other hand, the circular sealing area inside the circular packing groove often has an unused portion that is not used. Therefore, in the portion where the fastening member (49) is present, the packing groove (29f) is depressed toward the center of the seal area inside the annular packing (33), thereby securing a necessary seal area. By moving the fastening member inward as much as possible, the external dimensions of the connector and the like are reduced. Accordingly, the mass and mass moment of devices such as connectors can be reduced.

  In the present invention, it is preferable that the packing (33) has a V-shape in which a groove depth is divided into two in a side sectional shape.

  It is preferable that there are three or more recessed portions (33d) near the center of the packing (33). The part (33d) is sufficiently recessed toward the center so that the fastening member (49) is located inside the outer periphery of the part (33b) projecting toward the periphery of the packing (33). It is preferable that

According to the present invention, it is possible to provide a device such as a connector that can have a smaller radial dimension than the connector of Patent Document 1. As a result, it is possible to provide a connector or the like in which the mass and the moment of inertia of the device are reduced, the inertial load accompanying vibration is reduced, and the vibration resistance is further improved.

It is a figure of plug P of the connector concerning the embodiment of the present invention. (A) is a front view, (B) is a side sectional view. FIG. 4 is an enlarged plan view showing a socket insulator 25 of the plug P. FIG. 4 is a side sectional view showing a state where a cable strand 41 is connected to a female contact 21 of a plug P and a cable 43 is incorporated in a main body cover 29. FIG. 3 is a side sectional view of the vibration-proof connector shown in FIG. 2 of Patent Document 1. The plug P and the receptacle R are separated. FIG. 5 is a side cross-sectional view of the vibration-proof connector shown in FIG. 4 in a state where a plug P and a receptacle R are combined.

C: Connector, P: Plug, R: Receptacle
21; female contact, 21b; slot with slit, 21f; fixing body, 21j; solder fixing part
25; socket insulator, 25b; hole, 25f; contact fixing part, 25m; leg,
25r; footrest
29; body cover (casing), 29b; end face, 29q; bottom, 29r: pedestal
29f; packing groove, 29fb; convex portion, 29fd; concave portion, 29t; bolt hole forming portion, 29w; bolt hole
29v; Cable hole
33; annular packing, 33b; convex portion (portion protruding toward the peripheral portion), 33d; concave portion (portion depressed toward the central portion),
41; cable strand, 43; cable,
45; Cable packing, 46; Clamp washer, 47; Clamp nut
48; fixing screw, 49; fastening member (bolt)
100; Panel, 100b; Opponent

Embodiment of the Invention

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram of a plug P of a connector according to an embodiment of the present invention. (A) is a front view, (B) is a side sectional view. The direction “up and down” shown in the figure is a direction in a general arrangement of the connector, but is not limited to the direction of gravity. "Left and right" in the front view is the direction in which the figure is viewed. The “reception side” in the side view is the side of the receptacle R or the device when connected as a connector, and the “anti-reception side” is the opposite side.

  The plug P of FIGS. 1 and 3 constitutes a connector that is generally similar to the prior art connector of FIGS. That is, the plug P includes a female contact 21, a socket insulator 25 for holding the female contact 21, a main body cover 29 containing them, and the like. A cable hole 29v into which an end of the cable 43 (see FIG. 3) is inserted is formed in a lower portion of the main body cover 29. The cable has an L-shaped bent shape in the plug P, similarly to the connector of Patent Document 1.

  Below the cable hole 29v, there are provided a cable packing 45 pressed against the outer periphery of the cable, and a clamp washer 46 applied to the lower end surface of the packing. A male screw is cut on the outer surface of the peripheral wall of the cable hole 29v, and a clamp nut 47 is screwed into the male screw. When the clamp nut 47 is screwed in, the cable packing 45 is compressed in the axial direction (up and down) via the washer 46, the packing protrudes inward, and is strongly pressed against the outer surface of the cable.

  Next, the “packing groove 29f” and the “plug end face packing 33” which are characteristic portions of the plug P of the present embodiment will be described in detail. A packing 33 is disposed on an end surface 29b of the main body cover 29 of the plug P on the receiving side. The packing 33 is fitted in a packing groove 29f carved in the end face 29b. The cross section of the packing 33 has a V-shape in which the groove depth is divided into two. This packing 33 seals the space between the panel 100 to which the receptacle R shown in FIG. 1B is attached and the main body cover 29 when the connector is connected, similarly to the packing 133 of the plug of the prior art. The main body cover 29 is fixed to the mounting panel 100 with fastening bolts 49.

  The feature of the plug end face packing 33 and the packing groove 29f of this embodiment is the front shape shown in FIG. The packing groove 29f has a three-leaf clover shape (in the case of three fastening members (bolts)) having three convex portions 29fb and three concave portions 29fd. Since the packing 33 is also along the packing groove 29f, the packing 33 has a three-leaf clover shape having three convex portions 33b and three concave portions 33d alternately in a front view. For example, when there are four fastening members (bolts), the shape becomes a four-leaf clover shape.

A bolt hole 29w penetrates the recess side 33d of the packing and the bolt hole forming part 29t outside the recess 29fd of the packing groove on the receiving side and the non-receiving side. In other words, the packing 33 and the packing groove 29f are recessed inside so as to avoid the bolt hole 29w. If the packing 33 and the packing groove 29f are circular without a dent (see a virtual circle KE indicated by an imaginary line in contact with the outer periphery of the convex portions 33b and 29fb), the bolt holes 29w will be provided outside the circle. The outer diameter of the main body cover 29 increases accordingly. In this embodiment, the bolt holes 29w and the bolts 49 are located inside the virtual circle KE.

In the connector plug P of this embodiment, the fixing screws 48 of the socket insulator 25 are arranged on the upper left and right sides inside the sealing grooves 29f and the projections 29fb and 33b of the packing 33 (in the sealing area), and the lower part is a cable. The wire 41 (FIG. 3) is a space to be guided downward.

By reducing the diameter of the plug P, the connector C of the present invention can have a smaller radial dimension than the connector of Patent Document 1. As a result, the mass and the moment of inertia of the connector are reduced, the inertial load accompanying vibration is reduced, and the vibration resistance of the connector can be further improved.

  As shown in FIG. 1B, the socket insulator 25 is a block-shaped resin insulating member surrounding the female contact 21. The socket insulator 25 includes a total of six female contacts 21 in two stages vertically and three stages horizontally (see FIG. 1A).

The female contact 21 has a slot 21b for receiving a male contact, a fixing body 21f, and a solder fixing part 21j for a cable strand (see FIG. 3). The female contact 21 is inserted and fixed in the hole 25b of the contact fixing portion 25f of the socket insulator 25.

  The socket insulator 25 has a slightly long rectangular shape on the left and right sides as viewed from the front, and leg bases 25r, which are ear-shaped screw holding portions, are formed on both right and left sides to protrude. In the same leg stand 25r, the socket insulator 25 is attached to the main body cover 29 by screws 48. As shown in FIG. 2, the leg stand 25r is connected to the contact fixing portion 25f on the opposite side to the receiving side, and projects left and right. A leg 25m is connected to the inside of the footrest 25r on the anti-recess side so as to extend to the anti-recess side.

  The leg 25r of the insulator 25 is mounted on a pedestal 29r protruding from a bottom 29q of the main body cover 29. The pedestal 29r has a female screw (not penetrated) into which the screw 48 is screwed. The skirt 25p of the above-mentioned leg 25m extends along the inside of the pedestal 29r (left side in the direction of the arrow shown in the figure). The pedestal 29r is also a protrusion for positioning the upper edge of the insulator 25 against the left and right corners.

The space inside the skirt 25p of the leg 25m is a space in which the cable strand 41 is bent by 90 degrees as shown in FIG. In addition, it also serves as a work space for soldering the stripped strand of the cable strand 41 and the solder fixing portion 21j of the female contact 21. In this example, the solder fixing portion 21j of the female contact 21 has an open top shape with both the upper and lower female contacts 21. Therefore, the cable strand can reduce the stress caused by bending by the action of the legs 25m.

  In the embodiment described above, various modifications and additions are possible.

Claims (5)

A connector (P) in which a contact (21) for obtaining an electrical connection is accommodated in a casing (29) having a substantially circular outer shape in a front view ,
A packing groove (29f) formed on an end surface (29b) of the casing (29) to be abutted against the mating surface (100b) to hold an annular packing (33);
An insulator (25) containing the contact (21) is arranged in a seal area inside the annular packing (33),
The contact (21) can be connected to and separated from a contact (101) on the other side,
The end surface (29b) of the casing (29) is brought into contact with or separated from the mating surface (100b) as the contact (21) is connected to and separated from the mating contact (101). Becomes
In a portion where the fastening member (49) that abuts the end surface (29b) against the mating surface is present, the packing groove (29f) is recessed toward the center of the seal area inside the annular packing (33), In a portion where the fastening member (49) does not exist, the packing groove (29f) projects toward a peripheral portion of the seal region ,
The connector, wherein the packing groove (29f) has a three-leaf clover shape or a four-leaf clover shape in a front view . The casing (29) is a portion (29fb / 33b) where the insulator (25) projects toward the periphery of the seal area and is inside two cloverleaf-shaped leaves facing each other. 2. The connector according to claim 1, wherein the connector is fixed to the connector. The packing groove (29f) has a three-leaf clover shape in a front view,
The insulator (25) is a portion (29fb / 33b) projecting toward the periphery of the seal region, and the casing (29) is provided inside two cloverleaf-shaped leaf portions facing each other. Is fixed to
2. The connector according to claim 1, wherein a cable (43) is inserted into a portion (29fb, 33b) projecting toward a peripheral portion of the seal region, which is a remaining clover leaf portion. The packing (33) has a V-shape in a side cross-sectional shape in which a deep portion of the groove (29f) is divided into two parts and has only one convex portion protruding from the groove (29f). The connector according to claim 1 , 2 or 3, wherein The connector according to any one of claims 1 to 4, wherein the fastening member (49) is located inside an imaginary circle (KE) in contact with an outer periphery of the packing groove (29f).

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