JP2014016720A - Sealing structure of on-vehicle equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing structure of on-vehicle equipment such that a case and a harness connection part can be sealed with one sealing cap.SOLUTION: A sealing structure of a tachograph 21 includes a case 11 having a top case 33 and a back case 35 which are fastened in one body with a screw 43; a connector mounting hole 13 of the back case 35 into which a harness connector 25 is inserted; a connector cover 15 removed from the connector mounting hole 13 only by being slid in one direction parallel with a case surface 41; a blind hole 17 recessed on one directional side of the connector mounting hole 13 and arranged at an inner bottom part 67 of the screw 43; and a sealing cap 19 which abuts against the connector cover 15 to stop a movement in one direction.

Description

  The present invention relates to a sealing structure for in-vehicle equipment.

  As an in-vehicle device, an operation recorder that records information such as a traveling speed and a traveling distance of a vehicle is known (see, for example, Patent Document 1). As an operation recorder, an operation recorder that opens and closes a case in which instruments such as a clock and a speedometer are integrally accommodated with respect to a main body attached to an instrument panel has been widely used. In the operation recorder, to connect the harness connector so that the wiring (harness connector) for capturing the travel pulse from the travel sensor that detects the travel speed of the vehicle can be connected from the back side of the console box that is inconspicuous from inside the vehicle The board connector is arranged on the rear surface of the main body. In accordance with this, the board on which the board connector is mounted is disposed on the rear end side inside the main body.

  In such an operation recorder, a volume for adjusting the detection reference voltage, that is, a variable resistor is provided in order to adjust the detection sensitivity of the travel pulse after voltage conversion in accordance with the characteristics of the travel sensor. ing. In order to be able to adjust this variable resistance at the time of final test before product shipment or maintenance, it is conceivable that an opening is provided in the rear part of the main body and is usually closed with a removable plate material or the like. However, if there is no need to adjust the variable resistance, the travel information recorded on the recording paper will be changed to something different from the actual one, leading to falsification of the travel information recording. There is a risk that. Therefore, the variable resistor cannot be easily exposed to the outside of the main body.

  Therefore, in the conventional operation recorder, the variable resistance operated to adjust the detection sensitivity of the travel pulse from the travel sensor of the vehicle is outward from the opening 503 provided at the rear end of the main body 501 shown in FIG. Exposed to. The main body 501 includes an upper case 507 having a top plate portion 505 and a lower case 511 having a bottom plate portion 509. The upper case 507 and the lower case 511 have attachment plates 513 attached to both sides, and a front panel 515 attached to the front part. When the main body 501 closes the opening 503 with the heat radiating plate 517, one mounting screw 521 among the plurality of mounting screws 519 used for screwing the heat radiating plate 517 to the main body 501 is hidden from the outer side of the upper case 507. Then, the tip of the mounting screw 521 is inserted into the through hole 527 of the mounting piece 525 of the heat radiating plate 517 and fixed inside the main body 501. Thereafter, the blind hole 523 is closed with a cap 529 so that the mounting screw 521 is not exposed to the outside of the main body 501. As a result, operations of internal components that lead to falsification of the record of travel information are made possible when necessary, but are usually not easily performed.

Japanese Patent Laid-Open No. 10-239089

  By the way, when the operation recorder is attached to the vehicle, a harness connector (not shown) is coupled to the substrate 531 of the main body 501 through the connector mounting hole 533 of the heat sink 517 for the purpose of electrical connection with the vehicle. In addition, since the connector mounting hole 533 provided in the heat radiating plate 517 is large, the harness connector can be removed after the mounting.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and its purpose is to seal a case and seal a harness connection part with a single sealing cap, thereby reducing the cost of the sealing structure and improving workability. To provide a structure.

The above object of the present invention is achieved by the following configuration.
(1) It has a front case and a back case that are integrally fixed by a locking member, a case in which a board on which a board connector is mounted is accommodated inward, and is formed on the back case and coupled to the board connector A connector mounting hole into which the harness connector is inserted, a connector cover that is detached from the connector mounting hole only by movement (slide) in one direction parallel to the case surface of the back case, and formed in the connector cover, A notch through which the electric wire connected to the harness connector is inserted, a blind hole that is recessed in the one direction side of the connector mounting hole of the back case, and the locking member is arranged on the inner bottom portion, and is mounted in the blind hole And a sealing cap that contacts the connector cover and prevents movement in the one direction.

  According to the sealing structure of the in-vehicle device having the configuration (1), the case cannot open the front case and the back case unless the locking member is released. The locking member is located at the inner bottom of the blind hole and covered with a sealing cap. The locking member is exposed by removing the sealing cap. On the other hand, a connector mounting hole into which a harness connector can be inserted is formed in the back case. The harness connector can be coupled to the board connector mounted on the board accommodated in the case by being inserted into the connector mounting hole. The connector mounting hole in which the harness connector is inserted is sealed by the connector cover. The electric wire led out from the harness connector is inserted into a notch formed in the connector cover and led out of the case. The connector cover is detached from the connector mounting hole only by movement (sliding) in one direction parallel to the case surface in which movement in a plurality of directions is restricted. Here, the blind hole is provided in the one direction side of the connector mounting hole of the back case. The sealing cap attached to the connector attachment hole abuts on the connector cover and prevents the connector cover from moving in the one direction. Accordingly, since the connector cover cannot be easily detached, the harness connector cannot be released from the coupling, and the locking member cannot be released from being fixed.

(2) A sealing structure for an in-vehicle device having the configuration of (1) above, wherein a plurality of cover slides are provided at predetermined intervals along an opening peripheral edge of the connector mounting hole and slidably contact the inner surface of the connector cover. An in-vehicle device comprising: a step portion; and a plurality of cover locking pieces disposed between the cover slide step portions along an opening peripheral edge of the connector mounting hole and contacting an outer surface of the connector cover. Equipment seal structure.

  According to the sealing structure of the in-vehicle device having the configuration of (2) above, the back cover is sandwiched in the thickness direction by the cover slide step portion and the cover locking piece provided at the periphery of the opening of the connector mounting hole. The connector cover can be supported so as to be movable only in one direction parallel to the case surface. The cover slide step and the cover locking piece are provided complementarily to the opening periphery of the connector mounting hole in the front view of the back case, so the mold does not undercut during integral molding, and the back case can be molded. It becomes easy.

(3) A sealing structure for an in-vehicle device configured as described in (2) above, wherein one of the cover locking pieces is disposed in proximity to the blind hole.

  According to the sealing structure of the in-vehicle device having the configuration of (2) above, the connector cover whose sliding is restricted by contacting the sealing cap attached to the blind hole is one cover disposed close to the blind hole. The movement of the connector cover to the outer surface side is restricted by the locking piece. Thereby, it is possible to reliably prevent the connector cover from lifting over the sealing cap.

  According to the sealing structure of the in-vehicle device according to the present invention, the sealing of the case and the sealing of the harness connecting portion can be performed with one sealing cap, and the cost of the sealing structure can be reduced and the workability can be improved.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is the bottom view which looked at the vehicle equipment provided with the sealing structure concerning one embodiment of the present invention from the back case side. It is AA sectional drawing of FIG. It is a bottom view in the state where the connector cover of the in-vehicle device shown in FIG. 1 was removed. It is BB sectional drawing of FIG. It is a disassembled perspective view of the conventional vehicle equipment. It is a principal part expanded sectional view of the vehicle equipment shown in FIG.

Embodiments according to the present invention will be described below with reference to the drawings.
The sealing structure of the in-vehicle device according to the present embodiment is suitably used as, for example, the operation recorder 21 that is an in-vehicle device. In addition, the sealing structure may be applied to any vehicle-mounted device that is desired to be able to recognize the trace of opening the case 11. In the present embodiment, a case where the sealing structure is applied to the operation recorder 21 will be described.
As shown in FIGS. 1 and 2, the seal structure of the operation recorder 21 according to this embodiment includes a case 11, a connector mounting hole 13, a connector cover 15, a blind hole 17, and a sealing cap 19. Have.

  The operation recorder 21 accommodates instruments such as a clock and a speedometer integrally with a case 11 attached to an instrument panel (not shown). In the operation recorder 21, a lead wire 23 (see FIG. 2) that is an electric wire for taking in a traveling pulse from a traveling sensor that detects the traveling speed of the vehicle can be connected from the back side of the console box that is not conspicuous from the inside of the vehicle. A board connector 27 for connecting the harness connector 25 is disposed inside the case 11. In accordance with this, the board 29 on which the board connector 27 is mounted is accommodated in the case 11.

  The case 11 is integrally fastened (fixed) by a plurality of screws 31 and screws (locking members) 43, and a case 29 made of, for example, resin or sheet metal that accommodates the substrate 29 on which the substrate connector 27 is mounted inside. It has a back case 35. A plurality of fixed pillars 37 projecting toward the back case 35 are erected on the inner side of the front case 33, and a fixed hole 39 is formed at the tip of the fixed pillar 37 in the axial direction. A screw 31 or a screw 43 inserted from the case surface 41 of the back case 35 is screwed into the fixing hole 39 of the fixing column 37. As a result, the back case 35 is fastened and fixed to the front case 33.

  In the present embodiment, the substrate 29 is placed on the protruding front end surface 45 of the fixed column 37. A screw through hole 47 is formed in the substrate 29. The substrate 29 is sandwiched between the peripheral edge of the back case screw hole 49 and the protruding tip surface 45 by the screw 43 inserted into the back case screw hole 49 being passed through the screw through hole 47 and fastened to the fixing column 37. Fixed. The plurality of screws 31 may be inserted into the other back case screw holes 49 and may be directly fastened to the fixing columns 37 without penetrating the substrate 29. A board connector 27 is mounted on the board 29, and the board connector 27 is opened toward the back case 35 at a coupling opening 51 with the harness connector 25 serving as a mating connector.

  A substantially rectangular connector mounting hole 13 is formed in the back case 35. The connector mounting hole 13 exposes the coupling opening 51 of the board connector 27 mounted on the board 29. The connector mounting hole 13 is formed so that the harness connector 25 coupled to the coupling opening 51 can be inserted. The harness connector 25 coupled to the board connector 27 is accommodated in the connector mounting hole 13 without protruding outward from the case surface 41.

A connector cover 15 that closes the connector mounting hole 13 can be mounted on the case surface 41 of the back case 35.
The connector mounting hole 13 is recessed with a predetermined interval along the periphery of the opening, and is formed between a plurality of cover slide steps 53 that slidably contact the inner surface of the connector cover 15 and the cover slide step 53 along the periphery of the opening. And a plurality of cover locking pieces 57 that come into contact with the outer surface of the connector cover 15 (see FIG. 4).

The cover slide step 53 accommodates the connector cover 15 in the thickness direction, and arranges the connector cover 15 slightly below the case surface 41. The cover slide step 53 is open at one side of the opening edge corresponding to the case one side edge 55 (see FIG. 1) of the back case 35.
In the cover locking piece 57, the cover locking surface 59 faces the outer surface of the connector cover 15 disposed on the cover slide step portion 53. As shown in FIG. 1, the cover locking piece 57 is not provided on one side of the opening edge corresponding to the case one side edge 55 of the cover slide step portion 53. Thus, the connector cover 15 is sandwiched in the thickness direction by the cover slide step portion 53 and the cover locking piece 57, so that only one direction (left direction in FIG. 1) parallel to the case surface 41 of the back case 35 is obtained. It is supported so as to be movable, and is configured to be detached from the connector mounting hole 13 only by movement (slide) in one direction.

  The connector cover 15 is formed with a slit-shaped notch 61 that is cut from the insertion side edge (right side in FIG. 1) of the connector cover 15 toward the center. As shown in FIG. 2, the lead wire 23 connected to the harness connector 25 can be inserted into the notch 61.

  In the present embodiment, the connector cover 15 that closes the connector mounting hole 13 is disposed close to the connector rear end face 63 of the harness connector 25. The lead wire 23 led out from the connector rear end face 63 is led out from the notch 61 of the adjacent connector cover 15. The notch 61 can be formed with a minimum size through which the lead wire 23 passes. For this reason, the opening around the lead wire lead-out portion can be made small, the entry of dust, insects and the like into the operation recorder 21 is reduced, and the operation reliability of the operation recorder 21 is improved.

  Here, since the connector rear end face 63 is disposed close to the connector cover 15 in the harness connector 25, the connector rear end face 63 remains connected to the connector cover 15 even if the lead wire 23 is pulled or the like and moved in the coupling release direction. In this case, further movement in the uncoupling direction is restricted. That is, the board connector 27 and the harness connector 25 can be prevented from coming off even if they are of a type without a lock. Thereby, the choice of a connector type can be expanded. Further, the connector cost can be reduced. Further, the harness connector 25 can be downsized.

  The connector cover 15 may be configured to cover part or all of at least one screw 31. In the present embodiment, as shown in FIG. 1, a substantially lower half of the screw 31 located at the upper left in the figure is covered by the connector cover 15. The screw 31 cannot be released unless the connector cover 15 is removed.

  A blind hole 17 is recessed in the one direction side (left side in FIG. 1) of the connector mounting hole 13 of the back case 35. The blind hole 17 is formed deeper than the case surface 41, and the back case screw hole 49 is provided in the inner bottom portion 67. As a result, the head 69 of the screw 43 is disposed on the inner bottom 67. As shown in FIGS. 1 and 3, the blind hole 17 provided on one side of the connector mounting hole 13 is arranged at a position where approximately one quarter overlaps the connector mounting hole 13. The connector cover 15 is formed with an R-shaped cutout 71 at a portion overlapping the connector mounting hole 13. Accordingly, the blind hole 17 is disposed between the R-shaped cutout 71 of the connector cover 15 and the case edge 55 of the back case 35.

  A sealing cap 19 is attached to the blind hole 17. The sealing cap 19 attached to the blind hole 17 has a cap surface 73 that is substantially flush with the case surface 41. The sealing cap 19 is made of, for example, a synthetic resin molded product, and is detached from the blind hole 17 by breakage. The sealing cap 19 attached to the blind hole 17 covers the screw 43 fastened to the fixed column 37. That is, the screw 43 cannot be released unless the sealing cap 19 is broken and detached. As shown in FIG. 1, the sealing cap 19 attached to the blind hole 17 disposed between the R-shaped cutout 71 of the connector cover 15 and the case one edge 55 of the back case 35 has the R of the connector cover 15. Contact with the shape notch 71 prevents the connector cover 15 from moving in one direction.

  In the present embodiment, a cap locking projection 75 is provided in the blind hole 17. An annular groove 77 that is locked to the cap locking protrusion 75 is formed on the outer periphery of the sealing cap 19. The cap locking projection 75 and the annular groove 77 may have a wedge-shaped cross section having a locking surface perpendicular to the pulling direction and having a locking surface perpendicular to the pulling direction, as well as a cross-sectional shape engaged with a curved surface as shown in the illustrated example.

  Further, in the present embodiment, one of the cover locking pieces 57 for restricting the upward movement of the connector cover 15 is disposed close to the right side of the blind hole 17 as shown in FIG. .

Next, the operation of the sealing structure of the operation recorder 21 having the above configuration will be described.
In order to connect the operation recorder 21 to the vehicle, the fastening of the screws 43 and all the screws 31 is completed. The harness connector 25 is inserted into the connector mounting hole 13 and coupled to the board connector 27 located in the connector mounting hole 13. Next, while the lead wire 23 is passed through the notch 61 of the connector cover 15, the connector cover 15 is slid and inserted between the cover slide step 53 and the cover locking piece 57 from the one side edge 55 of the case to insert the connector mounting hole 13. cover. Then, the sealing cap 19 is pushed into the blind hole 17, and the annular groove 77 and the cap locking protrusion 75 are locked to fix the sealing cap 19 to the blind hole 17. Thereby, the R-shaped notch 71 abuts the sealing cap 19 mounted in the blind hole 17 on the connector cover 15 and is prevented from moving in one direction which is the opening direction. That is, the connector cover 15 is prevented from being detached from the connector mounting hole 13.

  During operation, the operation recorder 21 has the screw 43 fixing the front case 33, the substrate 29 and the back case 35 sealed with the sealing cap 19. The screw 43 in the blind hole 17 must be fastened and released. Further, since the harness connector 25 is covered with the connector cover 15, the connector cover 15 must be removed in order to release the connection. Even in this case, the sealing cap 19 must be broken and removed.

  Thus, in the sealing structure of the operation recorder 21 of the present embodiment, the case 11 cannot open the front case 33 and the back case 35 unless all the screws 31 and the screws 43 are released. The screw 43 is located at the inner bottom 67 of the blind hole 17 and is covered with the sealing cap 19. Only when the sealing cap 19 is broken and removed, the head 69 of the screw 43 is exposed.

  On the other hand, a connector mounting hole 13 into which the harness connector 25 can be inserted is formed in the back case 35. The harness connector 25 can be coupled to the board connector 27 mounted on the board 29 accommodated in the case 11 by being inserted into the connector mounting hole 13. The connector mounting hole 13 in which the harness connector 25 is inserted is sealed by the connector cover 15. The lead wire 23 led out from the harness connector 25 is inserted into a notch 61 formed in the connector cover 15 and led out of the case 11. The connector cover 15 is detached from the connector mounting hole 13 only by sliding in one direction parallel to the case surface 41 whose movement in a plurality of directions is restricted by the cover slide step 53 and the cover locking piece 57.

  Here, the blind hole 17 is provided on the one direction side of the connector mounting hole 13 of the back case 35. The sealing cap 19 mounted in the connector mounting hole 13 contacts the connector cover 15 and prevents the connector cover 15 from moving in the one direction. Therefore, if the sealing cap 19 is not removed, the connector cover 15 cannot be removed, so that the harness connector 25 cannot be released and the screw 43 cannot be released.

  Further, in the sealing structure of the operation recorder 21 of the present embodiment, the connector cover 15 is sandwiched in the thickness direction by the cover slide step portion 53 and the cover locking piece 57 provided at the opening periphery of the connector mounting hole 13. The connector cover 15 can be supported so as to be movable only in one direction parallel to the case surface 41 of the back case 35. As shown in FIG. 3, the cover slide step portion 53 and the cover locking piece 57 are provided complementarily to the opening periphery of the connector mounting hole 13 in a front view of the back case 35. Undercutting does not occur, and the back case 35 can be easily molded.

  Furthermore, in the sealing structure of the operation recorder 21 of the present embodiment, the connector cover 15 whose sliding is regulated by contacting the sealing cap 19 attached to the blind hole 17 is disposed in the vicinity of the blind hole 17. The movement of the connector cover 15 to the outer surface side is restricted by one cover locking piece 57. Accordingly, it is possible to reliably prevent the connector cover 15 from being lifted over the sealing cap 19.

As described above, according to the sealing structure of the operation recorder 21 according to the present embodiment, the sealing of the case 11 and the sealing of the harness connecting portion 79 can be performed by the single sealing cap 19, thereby reducing the cost and work of the sealing structure. Can improve the performance.
In addition, the sealing structure of the vehicle-mounted device of the present invention is not limited to the above-described embodiment, and can be appropriately modified and improved. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
For example, the sealing cap in the present invention is not limited to a structure that cannot be detached unless it is broken like the sealing cap 19 in the above embodiment, and a part of the sealing cap is deformed or discolored at the time of separation. It is also possible to have a structure that leaves traces. Moreover, it can also be set as the structure which used the seal seal together.

DESCRIPTION OF SYMBOLS 11 ... Case 13 ... Connector mounting hole 15 ... Connector cover 17 ... Blindfold hole 19 ... Sealing cap 21 ... Operation recorder (vehicle equipment)
23 ... Lead wire (electric wire)
25 ... Harness connector 27 ... Board connector 29 ... Board 31 ... Screw 33 ... Front case 35 ... Back case 41 ... Case surface 43 ... Screw (locking member)
53 ... Cover slide step 57 ... Cover locking piece 61 ... Notch 67 ... Inner bottom 69 ... Head 75 ... Cap locking projection 77 ... Annular groove

Claims (3)

A case having a front case and a back case fixed integrally by a locking member, and a board on which a board connector is mounted is accommodated inside,
A connector mounting hole formed in the back case and into which a harness connector coupled to the board connector is inserted;
A connector cover that is detached from the connector mounting hole only by movement in one direction parallel to the case surface of the back case;
A notch that is formed in the connector cover and passes through the electric wire connected to the harness connector;
A blindfold hole that is recessed in the one direction side of the connector mounting hole of the back case, and that disposes the locking member on the inner bottom,
A sealing cap that is mounted on the blind hole and that contacts the connector cover to prevent movement in the one direction;
An in-vehicle device sealing structure comprising: A plurality of cover slide steps provided along the periphery of the opening of the connector mounting hole at a predetermined interval and slidably contacting the inner surface of the connector cover;
A plurality of cover locking pieces disposed between the cover slide step portions along the opening periphery of the connector mounting hole, and abutting against the outer surface of the connector cover;
The sealing structure for in-vehicle devices according to claim 1, comprising:   The sealing structure for an in-vehicle device according to claim 2, wherein one of the cover locking pieces is disposed in proximity to the blind hole.

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