JP5676302B2 - Drawer connector - Google Patents

Description

  The present invention relates to a drawer connector, and more particularly to a technique of a drawer connector for connecting an electronic component in a case and an external electronic component.

  For example, in Patent Document 1, when a drawer connector that relays and connects an electronic component in an inverter case mounted on an automobile and an external electronic component is attached to the opening of the inverter case, it faces the inverter case of the drawer connector. The O-ring packing is inserted into the annular mounting groove formed on the surface to be mounted, and this packing is pressed against the opening edge of the inverter case to seal between the joint surface of the drawer connector and the inverter case. Proposed. In particular, according to this document, since the rubber packing is difficult to achieve molding accuracy, the width of the mounting groove is made larger than the width of the packing to absorb molding errors.

JP 2009-295492 A

  However, in Patent Document 1, since the width of the mounting groove is larger than the width of the packing, the packing falls off from the mounting groove. Therefore, there is a problem that workability is poor because the packing is re-installed before the drawer connector is attached to the case. Therefore, for example, it may be possible to hold the packing by forming a large-diameter portion that contacts the inner wall surface of the mounting groove in a part of the packing, but the thickness of the large-diameter portion and other small-diameter portions is different. When the packing is pressed, the compression deformation varies, and the sealing performance between the drawer connector and the joint surface of the case may be reduced.

  The problem to be solved by the present invention is to maintain workability and to improve workability related to packing by suppressing the dropout of the packing.

  In order to solve the above-described problems, a basic aspect of the present invention is to form an opening in a joint surface that joins housings in which electronic components are housed, and a conductor that connects the electronic components to the opening. In a sealing structure that inserts and seals the opening between the joint surfaces by sealing the opening, an annular groove is formed surrounding the opening of the joint surface to which the packing is mounted, and from the groove bottom of the annular groove It is characterized in that a packing holding portion is formed, which is composed of a pair of tongue pieces that are erected toward the opening and are opposed to each other with a gap in the groove width direction.

  In another aspect of the present invention, a holding portion that holds a conductor connected to an electronic component housed in the case, and a holding portion that faces the conductor from the opening formed in the wall surface of the case. A flange supporting the case, an annular groove formed on the surface of the flange facing the case and surrounding the holding portion, and an annular packing attached to the annular groove. In the drawer connector having terminals formed so as to be connectable to the annular groove, a pair of the annular grooves that are erected from the bottom of the groove toward the opening and that are opposed to each other at an interval in the groove width direction. It is characterized in that a packing holding portion made of a tongue piece is formed.

  According to this, the packing attached to the annular groove of the drawer connector is sandwiched between the pair of tongue pieces in the annular groove and held in the annular groove. Therefore, since the cross-sectional shape of the packing can be formed to be the same over the entire length, the sealing performance can be maintained, and the packing can be prevented from dropping from the annular groove. As a result, it is possible to suppress the work of re-installing the packing due to the dropping of the packing, and to improve the workability related to the packing installation. Note that the pair of tongue pieces is preferably formed of an elastic member.

  In this case, the pair of tongue pieces can be formed away from the inner wall surface of the annular groove. According to this, when the packing is inserted between the pair of tongue pieces, the pair of tongue pieces are pushed and expanded in the direction in which the interval widens, so the reaction force acts as a holding force of the packing, The holding power of the packing can be improved, and the dropping of the packing can be further reduced.

  Moreover, the nail | claw which protrudes in the direction where a pair of tongue piece faces can be formed in the front-end | tip part of a pair of tongue piece. According to this, for example, even if vibration during transportation of the pull-out connector acts on the pair of tongue pieces or packing, it is possible to restrict the packing from coming out by the claw, so that it is possible to further suppress the dropping of the packing.

  In this case, a projecting portion formed wider than the distance between the pair of claws can be formed at the portion of the packing that contacts the pair of tongue pieces. According to this, since the protruding portion of the packing is caught by the pair of claws and the movement of the packing in the escape direction can be further restricted, it is possible to reliably prevent the packing from dropping off.

  Further, the pair of tongue pieces are formed so that the tips of the pair of tongues approach each other toward the opening of the annular groove, and the packing escapes from between the pair of tongue pieces by reducing the distance between the tip portions of the pair of tongue pieces. This can be suppressed. In this case, since the interval between the tip portions of the pair of tongue pieces becomes narrow and it becomes difficult to insert the packing, it is preferable to form convex curvature portions on the tip surfaces of the pair of tongue pieces facing each other. According to this, packing can be inserted between a pair of tongue pieces along the curvature of a front end surface.

  ADVANTAGE OF THE INVENTION According to this invention, dropping of a packing can be suppressed with maintaining sealing performance, and workability | operativity which concerns on packing mounting can be improved.

It is a perspective view of the drawer connector of Embodiment 1 of the present invention. It is sectional drawing of the state by which the drawer connector of FIG. 1 was supported by the case. It is a top view of the surface facing the case of the drawer connector of FIG. It is sectional drawing of the holding | maintenance part holding the packing of FIG. It is a figure which shows the modification of the drawer connector of Embodiment 1. FIG. It is sectional drawing of the holding | maintenance part holding the packing of the drawer connector of Embodiment 2 of this invention. It is sectional drawing of the holding | maintenance part holding the packing of the drawer connector of Embodiment 3 of this invention.

Hereinafter, the present invention will be described based on an embodiment (Embodiment 1).
The drawer connector 1 of Embodiment 1 shown in FIGS. 1-4 is attached to the opening of the wall of the case 3 which accommodates the electronic component mounted in a motor vehicle etc., for example, and the electronic component in the case 3 and an external electronic component are attached. It is a connector used when connecting. The drawer connector 1 is formed of, for example, an insulating resin. The drawer connector 1 includes a holding portion 5 for holding a conductor connected to an electronic component housed in the case 3, and a holding portion 5 with the conductor facing the opening 3 in the wall surface 7 of the case 3 in the case 3. A flange 11 supported by the case 3, an annular groove 13 formed on the joint surface 12 of the flange 11 facing the wall surface 7 of the case 3 so as to surround the holding portion 5, and an annular packing 15 attached to the annular groove 13 Is provided.

  The holding part 5 has a plurality of through holes 25 and 27 in which the conductors connected to the electronic components in the case 3, for example, the Y terminal 17 and the RH terminal 19 are respectively formed, and the terminal fittings 21 and 23 are respectively held. It is arranged. On the other end side of the terminal fittings 21 and 23, terminals connected to external electronic components are formed. Accordingly, the terminal fittings 21 and 23 are provided with terminals that can be connected to electronic components at both ends. On the back surface side of the holding portion 5 (on the opposite side of the surface facing the wall surface 7 of the case 3), cylindrical portions 29, 31 surrounding terminals that are pulled out from the terminal fittings 21, 23 and connected to external electronic components are provided. Is formed. The cylindrical portions 29 and 31 are formed so as to be attachable to, for example, a mating connector connected to an external electronic device. Inside the tubular portion 29, a packing 30 is mounted for sealing the joint surface between the tubular portion 29 and the mating connector. In addition to the present embodiment, the drawer connector is, for example, a connector that directly connects an electric wire to a terminal on the back side of the holding unit 5 and electrically connects an electronic device in the case 3 and an external electronic device. It is a known connector that can connect electronic devices.

  A flange 11 formed integrally with the holding unit 5 is provided on the outer peripheral side of the holding unit 5. In the flange 11, a plurality (four in the figure) of bolt holes 33, a plurality (two in the figure) of pins 35 protruding from the joint surface 12 of the flange 11, and a ring 15 into which the packing 15 is inserted in the direction of the arrow 37. A groove 13 is formed. The annular groove 13 surrounds the holding part 5, in other words, is formed so as to surround the opening 9 of the case 3 corresponding to the holding part 5. A collar 39 is attached to each bolt hole 33, and a bolt that is screwed into the bolt hole of the case 3 is inserted therethrough. Each pin 35 is formed in a tapered column shape and can be fitted into a plurality (two in the drawing) of recesses 41 formed in the case 3. Thus, when the drawer connector 1 is attached to the case 3, the drawer connector 1 can be positioned at a position where each pin 35 is fitted in each recess 41. The annular groove 13 is formed in a U-shaped cross section in the depth direction by a bottom portion 43 and side walls 45 erected from both side portions of the bottom portion 43.

  The packing 15 inserted into the annular groove 13 is, for example, an O-ring-shaped packing 15 and is formed of an elastic material such as rubber or resin. The packing 15 is formed so that a part protrudes from the annular groove 13 in a state of being inserted into the annular groove 13. That is, the diameter of the packing 15 is formed larger than the depth dimension of the annular groove 13.

  Next, the characteristic configuration of the first embodiment will be described. Inside the annular groove 13 to which the packing 15 is mounted, a pair is formed so as to stand from the bottom 43 of the annular groove 13 toward the opening and to face each other with a gap in the groove width direction of the annular groove 13. A plurality of holding portions 51 (four in the drawing) of the packing 15 including the tongue pieces 47 and 49 are formed. The tongue pieces 47 and 49 are erected in parallel. The tongue pieces 47 and 49 are made of an elastic resin material, for example, the same material as that of the drawer connector 1. The tongue pieces 47 and 49 are formed away from the side wall 45 of the annular groove 13. Thereby, the tongue pieces 47 and 49 can be elastically deformed in directions away from each other. The gap between the tongue pieces 47 and 49 is formed such that the packing 15 can be inserted and the packing 15 can abut against the opposing surfaces of the tongue pieces 47 and 49, for example, a dimension smaller than the diameter of the packing 15. Yes. The height dimension of the tongue pieces 47 and 49 is formed to be equal to or less than the depth dimension of the annular groove 13. When the drawer connector 1 is fixed to the case 3, the tongue pieces 47 and 49 protrude from the annular groove 13 and the wall surface of the case 3. 7 is not hit. A pair of claws 53 and 55 projecting in the direction in which the tongue pieces 47 and 49 face each other are formed at the respective tip portions of the tongue pieces 47 and 49. Further, on the front end surfaces of the tongue pieces 47 and 49 facing each other, a curved portion 56 having convex end surfaces facing each other is formed. That is, the front end surfaces of the tongue pieces 47 and 49 are inclined by the curvature portion 56 between the tongue pieces 47 and 49.

  An operation of supporting and fixing the drawer connector 1 of the first embodiment configured as described above to the case 3 will be described. The Y terminal 17 and the RH terminal 19 are inserted into the opening 9 of the case 3 with the wall surface 7 of the case 3 and the joint surface 12 of the flange 11 of the drawer connector 1 facing each other. And the pin 35 which protrudes from the joining surface 12 is fitted in the recessed part 41 of the wall surface 7, and the drawer connector 1 is positioned. After positioning the drawer connector 1, a bolt is passed through the bolt hole 33 of the flange 11, and the bolt is screwed into the bolt hole of the case 3. Thereby, the drawer connector 1 is fixed to the case 3. Further, the packing 15 protruding from the annular groove 13 is compressed and elastically deformed by the wall surface 7 and the joint surface 12 by the fastening force of the bolt, and the space between the wall surface 7 and the joint surface 12 can be sealed. Thereby, it is possible to prevent water or the like from entering the case 3 from the opening 9 of the case 3. The electronic device in the case 3 is connected to the Y terminal 17 and the RH terminal 19 of the drawer connector 1 supported by the case 3. And an external electronic device is connected to the terminal pulled out to the back surface side of the joining surface 12 of the drawer connector 1, and the electronic device in the case 3 and an external electronic device can be electrically connected.

  Next, the characteristic action of the drawer connector 1 of Embodiment 1 is demonstrated. On the inner side of the annular groove 13 into which the packing 15 is inserted, a holding portion 51 made up of tongue pieces 47 and 49 facing each other at an interval in the groove width direction of the annular groove 13 is provided. The portion of the packing 15 corresponding to the holding portion 51 is inserted between the tongue pieces 47 and 49. At this time, since the curvature portion 56 inclined toward the inside of the tongue pieces 47 and 49 into which the packing 15 is inserted is formed on the front end surfaces of the tongue pieces 47 and 49, the packing 15 along the curvature of the curvature portion 56. Inserted. When the packing 15 is inserted, the tongue pieces 47 and 49 are elastically deformed in a direction away from each other. Since the tongue pieces 47 and 49 press the packing 15 due to the reaction force of the elastic deformation, the packing 15 is sandwiched and held between the tongue pieces 47 and 49. Further, since the gap between the tips of the tongues 47 and 49 is smaller than the diameter of the packing 15 by the claws 53 and 55 at the tips of the tongues 47 and 49, the packing 15 is inserted between the tongues 47 and 49. Escape can be regulated.

  Thus, according to the drawer connector 1 of Embodiment 1, the packing 15 attached to the annular groove 13 can be held and held by the tongue pieces 47 and 49. Further, even when vibration or the like during transportation of the drawer connector 1 acts on the tongue pieces 47 and 49 and the packing 15, the movement of the packing 15 may be regulated by the claws 53 and 55 even if the packing 15 is to be detached from the tongue pieces 47 and 49. Accordingly, it is possible to prevent the packing 15 from dropping off from the annular groove 13, so that it is possible to prevent the packing 15 from being reattached due to the dropping of the packing 15, thereby providing the drawer connector 1 with improved packing mounting workability.

  Further, since the packing 15 can be held without changing the dimensions of the annular groove 13 and the packing 15, it is possible to suppress the dropping of the packing 15 without reducing the sealing performance.

  When there is a low possibility of the packing 15 dropping off due to vibration during transportation, the tabs 53 and 55 are not formed as shown in FIG. . According to this, since the space | interval of the front-end | tip part of the tongue pieces 47 and 49 is wide, the workability | operativity which inserts the packing 15 between the tongue pieces 47 and 49 can be improved.

  Further, the tongue pieces 47 and 49 can be formed in close contact with the side wall 45 without being separated from the side wall 45 of the annular groove 13. In this case, the gap between the tongue pieces 47 and 49 is made smaller than the diameter of the packing 15, and the packing 15 is held by sliding the packing 15 against the mutually facing surfaces of the tongue pieces 47 and 49.

  The width dimension of the annular groove 13 can be designed as appropriate. For example, the width dimension of the annular groove 13 can be made larger than the diameter of the packing 15. According to this, since the opening of the annular groove 13 can be enlarged with respect to the packing 15, workability for inserting the packing 15 into the annular groove 13 can be improved.

  Moreover, the space | interval dimension of the tongue pieces 47 and 49 is not limited to this embodiment, For example, it can be made narrower than the diameter (thickness) of the packing 15. Further, if the distance between the tongue pieces 47 and 49 is too small, the portion of the packing 15 sandwiched between the tongue pieces 47 and 49 is deformed, and the compression deformation of the packing 15 when the drawer connector 1 is fixed to the case 3 is caused. There is a risk that variations and sealability may be reduced. Therefore, it is preferable to set the lower limit of the distance between the tongue pieces 47 and 49 in consideration of the deformation of the portion of the packing 15 sandwiched between the tongue pieces 47 and 49, sealability, and the like.

  In the first embodiment, the four holding portions 51 including the tongue pieces 47 and 49 are formed. However, if at least one holding portion 51 is formed, the packing 15 can be prevented from falling off.

  The packing 15 is not limited to an O-ring, and a well-known packing having a rectangular cross section can be used.

(Embodiment 2)
The drawer connector according to the second embodiment will be described with reference to FIG. The second embodiment differs from the first embodiment in that the distance between the tongue pieces 61 and 63 is made narrower than the diameter of the packing 15 toward the tip. In other words, the tongue pieces 61 and 63 are not formed in parallel, but are formed in a C shape whose interval is narrowed toward the opening of the annular groove 13. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  According to this, since the space | interval of the front end side of the tongue pieces 61 and 63 into which the packing 15 becomes an insertion opening was made narrower than the diameter of the packing 15, the packing 15 heading toward the front end direction (escape direction) of the tongue pieces 61 and 63. Can regulate movement. Furthermore, since the gap between the tongue pieces 61 and 63 is narrowed, the elastic force acting on the packing 15 from the tongue pieces 61 and 63 can be increased. Accordingly, it is possible to reliably prevent the packing 15 from falling off.

  In this case, since the gap between the tongue pieces 61 and 63 becomes narrow and it becomes difficult to insert the packing 15, it is preferable to form the curvature portion 56 on the tip surfaces of the tongue pieces 61 and 63 facing each other.

(Embodiment 3)
The drawer connector of Embodiment 3 is demonstrated using FIG. The third embodiment is different from the first embodiment in that protrusions 67 and 69 that are formed wider than the gap between the claws 53 and 55 are formed at positions corresponding to the tongue pieces 47 and 49 of the packing 15. Is a point. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  According to this, even if the packing 15 is inserted and held between the tongue pieces 47 and 49 and then the packing 15 moves toward the distal end direction (escape direction) of the tongue pieces 47 and 49, the protruding shape of the packing 15. Since the parts 67 and 69 come into contact with and engage with the claws 53 and 55, the packing 15 can be prevented from coming out from between the tongue pieces 47 and 49, and the packing 15 can be more reliably prevented from falling off.

  When the elastic force of the tongue pieces 47 and 49 related to the packing 15 is increased to improve the holding force of the packing 15, the packing 15 may be pushed out between the tongue pieces 47 and 49. It is preferable to form the protrusions 67 and 69 on the packing 15 as in the third embodiment.

  In addition, although Embodiment 1-3 demonstrated as an example the sealing structure of the joint surface of case 3 in which an electronic component is accommodated, and the drawer connector 1 in which the terminal metal fittings 21 and 23 are accommodated, the sealing structure of this invention However, the present invention is not limited to this, and is also applicable to a joint surface between cases in which electronic components are accommodated, a joint surface between housings in which electronic components are accommodated, or a case and connector, a case and housing, and a connector and housing joint surface. it can. That is, in one basic aspect of the present invention, an opening is formed in a joint surface that joins housings in which electronic components are housed, and a conductor that connects the electronic components is inserted into the opening, and the joint surface In the seal structure in which the opening is sealed by sandwiching the packing therebetween, an annular groove is formed to surround the opening of the joint surface and the packing is mounted, and the annular groove is erected from the bottom of the annular groove toward the opening. In addition, a packing holding portion formed of a pair of tongue pieces formed to face each other with a gap in the groove width direction is formed.

DESCRIPTION OF SYMBOLS 1 Pull-out connector 3 Case 5 Holding part 7 Wall surface 9 Opening 11 Flange 12 Joint surface 13 Annular groove 15 Packing 17 Y terminal 19 RH terminal 43 Bottom part 47, 49 Tongue piece 51 Holding part 53, 55 Claw 61, 63 Tongue piece 67, 69 Projection

Claims (4)

A holding part for holding a conductor connected to an electronic component housed in the case, and a flange for supporting the holding part in the case by facing the conductor into the case from an opening formed in a wall surface of the case And an annular groove formed on the surface of the flange facing the case so as to surround the holding portion, and an annular packing attached to the annular groove, and the conductor is drawn out to provide an external electronic component. In a drawer connector having terminals formed to be connectable to
The annular groove is formed with a packing holding portion which is erected from the groove bottom portion toward the opening and is formed of a pair of tongue pieces formed to face each other with a gap in the groove width direction. Drawer connector. The drawer connector according to claim 1, wherein
A pull-out connector characterized in that a claw projecting in a direction in which the pair of tongue pieces face each other is formed at the tip of the pair of tongue pieces. The drawer connector according to claim 2,
A drawer connector, wherein protrusions formed wider than the gap between the pair of claws are formed at positions corresponding to the pair of tongue pieces of the packing. The drawer connector according to any one of claims 1 to 3,
The pair of tongue pieces are formed so that their tips are close to each other toward the opening of the annular groove, and the tip surfaces facing each other are formed with a convex curvature.

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