JP2019021830A - Drip-proof structure of housing - Google Patents

Abstract

To provide a drip-proof structure which facilitates assembly of a wire holding part to a housing and suppresses a load on an electric wire during the assembly to the housing, while securing high drip-proofness.SOLUTION: A drip-proof structure comprises: a tubular member 42 which is fitted into a hole part (fitting hole 11a) of a housing 10; and a wire holding part 41 fixed within a tube of the tubular member 42 and including a through-hole for penetrating and holding an electric wire 30 while inserting it in a tube axis direction of the tubular member 42. A shape of the tubular member 42 in a view in the tube axis direction is larger than the hole part and is configured to reduce a diameter of the through-hole by compressing the wire holding part 41 in a direction that is orthogonal to the tube axis direction when the tubular member is fitted into the hole part of the housing 10. A diameter of the through-hole of the wire holding part 41 after the diameter reduction is equal to or smaller than a diameter of the electric wire 30 before the diameter reduction of the through-hole.SELECTED DRAWING: Figure 4

Description

  The present invention prevents liquid from entering the interior of the housing that houses a part of the electrical wiring inside, and penetrates the electrical wiring at a portion where the electrical wiring is exposed from the inside of the housing to the outside of the housing. It belongs to a technical field related to a drip-proof structure of a housing for holding.

  2. Description of the Related Art Conventionally, a drip-proof structure for preventing liquid from entering a housing and holding an elongated member therethrough has been considered.

  For example, Patent Document 1 discloses a structure of a fuel tank for an automobile, and a metal terminal for connecting a lead wire of a sensor provided in the fuel tank and a harness electrically connected to the sensor to pass through. There is disclosed a structure in which a terminal support part (wiring holding part) of a resin flange is provided, and a seal film made of a urethane-based adhesive is provided between the metal terminal and the terminal support part.

  With the structure of Patent Document 1, it is possible to prevent the fuel from leaking out between the metal terminal and the terminal support portion, and it is possible to prevent the liquid other than the fuel from entering the fuel tank.

JP-A-4-324323

  By the way, even when the remainder of the electrical wiring is exposed outside the housing from the housing in which a part of the electrical wiring is accommodated, the liquid enters the inside of the housing in the portion through which the electrical wiring passes. A drip-proof structure is applied to prevent this. In the drip-proof structure provided in such a portion through which the electric wiring passes, the wiring holding portion holds the electric wiring.

  In the configuration in which the wiring holding unit holds the electric wiring, it is difficult to apply the structure as described in Patent Document 1. That is, in a configuration in which a seal film made of an adhesive is provided between the electric wiring and the wiring holding portion as in Patent Document 1, after the electric wiring is firmly fixed to the wiring holding portion, the wiring holding portion is connected to the housing. It is assembled to the body. At this time, in the electrical wiring, the length from the connection portion to the circuit board to the wiring holding portion may become too long, and when the wiring holding portion is assembled to the housing, the electrical wiring is bent inside the housing. In addition, a load is applied to a connection portion between the electric wiring and a connection component (circuit board or the like) of the electric wiring, and in the worst case, the connection between the electric wiring and the connection component may be broken. Further, the electrical wiring cannot be accommodated inside the casing, and there is a possibility that the assembly itself of the wiring holding portion to the casing may be difficult.

  In order to prevent this, it is conceivable to calculate in advance an appropriate length of the portion of the electrical wiring from the connection portion to the circuit board to the wiring holding portion, and fix the electric wiring to the wiring holding portion. However, when there are a plurality of electrical wirings, it is necessary to make adjustments for each electrical wiring, and the wiring becomes complicated, so the length of each electrical wiring inside the housing can be calculated in advance. It becomes difficult. In addition, it becomes impossible to perform an operation for which the length of the above-mentioned portion of the electrical wiring has to be shortened, such as reconnection to the circuit board.

  The present invention has been made in view of such points, and the object of the present invention is to facilitate the assembly of the wiring holding portion to the housing while ensuring high drip-proofness, and to provide the wiring holding portion. It is to suppress the generation of a load on the electrical wiring when assembled to the housing.

  In order to solve the above-described problems, the present invention prevents liquid from entering the inside of a housing that houses a part of the electrical wiring, and the electrical wiring is connected from the inside of the housing to the outside of the housing. For the drip-proof structure of the housing for penetrating and holding the electrical wiring in the exposed portion, it is fitted into a hole formed in the housing and is an elastically deformable tubular tube A columnar or plate-like member that is fixed in the cylinder of the cylindrical member and has a through hole for passing through and holding the electrical wiring in the cylindrical axial direction of the cylindrical member, and is elastically deformable A wire holding portion, and the cylindrical member has a shape that is larger than the hole portion when viewed from the cylindrical axis direction, and is fitted into the hole portion of the casing. The wiring holding portion is compressed in a direction perpendicular to the cylinder axis direction, and the through hole is reduced in diameter. Is configured such that the diameter of the through hole of the contraction 径後 were those that diameter or less, the electrical wiring before the through hole is reduced in diameter.

  According to this configuration, in the state before the tubular member is fitted into the hole of the housing, that is, before the wiring holding portion is assembled to the housing via the tubular member, the through hole of the wiring holding portion Is not reduced in diameter, and the electric wiring is not firmly fixed to the wiring holding portion, so that the relative position between the wiring holding portion and the electric wiring can be freely adjusted. Therefore, when assembling the wiring holding part to the housing, in the electrical wiring, the portion from the connection portion to the circuit board to the wiring holding portion, that is, the portion of the electrical wiring housed inside the housing is not bent. After adjusting the relative position between the wiring holding part and the electrical wiring, the wiring holding part can be assembled to the housing. As a result, it is possible to facilitate the assembly of the wiring holding unit to the housing and to suppress the generation of a load on the electrical wiring when the wiring holding unit is assembled to the housing.

  In addition, when the cylindrical member is fitted into the hole of the housing, the diameter of the through hole of the wiring holding part is equal to or smaller than the diameter of the electric wiring before the through hole is reduced. Since the diameter is reduced, the inner peripheral edge portion of the through hole and the electric wiring are in close contact with each other, and no gap is formed between the portion of the electric wiring located in the through hole and the wiring holding portion. Thereby, after fitting a cylindrical member in the hole of a housing | casing, since a liquid is prevented from entering the inside of a housing | casing, high drip-proof property can be ensured.

  Therefore, while ensuring high drip-proof property, it is possible to facilitate the assembly of the wiring holding unit to the housing and to suppress the generation of a load on the electrical wiring when the wiring holding unit is assembled to the housing.

  In one embodiment of the drip-proof structure of the housing, there are a plurality of the electrical wirings, and a plurality of the through holes are provided corresponding to the number of the electrical wirings.

  In other words, if there are multiple electrical wires, it is difficult to calculate in advance the appropriate length of the portion of the electrical wire housed inside the housing. By freely adjusting the relative position between the holding portion and the electric wiring, it is possible to appropriately exert the effect of suppressing the load on the electric wiring when the wiring holding portion is assembled to the housing.

  In addition, when there are a plurality of electrical wirings, it is necessary to prevent entanglement between the electrical wirings in addition to preventing the bending of each electrical wiring. On the other hand, if the drip-proof structure of the present invention is applied, even if there are a plurality of electric wirings, the relative positions of the electric wirings and the wiring holding parts are adjusted before the wiring holding parts are assembled to the housing. In addition, since the appropriate length of the portion of each electrical wiring housed in the housing can be adjusted, bending of each electrical wiring and entanglement between the electrical wirings can be prevented.

  Moreover, since each through-hole corresponding to each electric wiring is diameter-reduced when a cylindrical member is fitted to the hole of a housing | casing, it can also ensure high drip-proof property.

  In the drip-proof structure of the casing, it is desirable that the cylindrical member has a shape similar to the hole portion, the shape of which is viewed from the cylinder axis direction, which is larger than the hole portion.

  Thus, when the tubular member is fitted into the hole, the tubular member is uniformly reduced to the inside of the tube. As a result, the wiring holding portion is uniformly compressed and the through hole is also uniformly reduced in diameter, so that a gap is less likely to be formed between the portion of the electrical wiring located in the through hole and the wiring holding portion. As a result, the drip-proof property of the housing can be further improved.

  In the drip-proof structure of the casing, the wiring holding portion is positioned in the cylindrical member so that a recess is formed on the inner side of the casing in the cylindrical axis direction in cooperation with the cylindrical member. It is desirable.

  According to this structure, the part which comprises the recessed part in a cylindrical member can be deform | transformed so that it can insert in this housing | casing easily through the hole of a housing | casing. And if the part which comprises the recessed part in a cylindrical member is inserted in the inside of a housing | casing, the remaining part of a cylindrical member can be easily inserted in a housing | casing, along the periphery of the said hole. Thereby, the assembly | attachment of a wiring holding part can be made still easier.

  In the drip-proof structure of the housing in which the wiring holding portion and the cylindrical member are formed with a recess on the inner side of the housing, it is desirable that the recess is filled with an adhesive.

  With this configuration, the drip-proof property can be further improved.

  In the drip-proof structure of the housing, when the housing is a camera housing attached to a flying object. The casing is preferably attached to the flying body such that the hole is positioned on the lower side.

  That is, if the hole is positioned on the lower side, for example, even if the flying object is operated in rainy weather, rainwater can be prevented from entering the housing. Thereby, even if it is a case where the said housing | casing is a housing | casing of the camera attached to a flying body, drip-proof property can be ensured appropriately.

  As described above, according to the drip-proof structure of the housing according to the present invention, when the cylindrical member fitted into the hole of the housing is fitted into the hole of the housing, The wiring holding part is configured to compress in a direction orthogonal to the cylinder axis direction of the cylindrical member to reduce the diameter of the through hole. The diameter of the through hole after the diameter reduction is as described above. Since the diameter of the electrical wiring before the diameter of the through hole is reduced, the relative position between the wiring holding portion and the electrical wiring can be freely adjusted before the tubular member is fitted into the hole of the housing. In addition, it is possible to facilitate the assembly of the wiring holding unit to the housing and to suppress the generation of a load on the electrical wiring when the wiring holding unit is assembled to the housing. On the other hand, after the tubular member is fitted into the hole of the housing, the inner peripheral edge of the through hole and the electric wiring are in close contact with each other, and the portion located in the through hole in the electric wiring and the wiring holding portion A gap is not formed between the two and high drip-proof property can be obtained.

It is a perspective view which shows the flying body to which the camera which has a housing | casing provided with the drip-proof structure which concerns on embodiment of this invention was attached. It is a disassembled perspective view of the said camera. It is a top view inside a housing | casing which shows the wiring state of the electrical wiring in a housing | casing. FIG. 4 is a cross-sectional view corresponding to the line IV-IV in FIG. 3, showing a state where a lid member is assembled to the housing. It is the rear view which looked at the said camera from the rear side. It is a perspective view of a drip-proof connector. It is sectional drawing which cut | disconnected the drip-proof connector by the plane which passes along a through-hole, Comprising: The state before a cylindrical member fits into the fitting hole of a housing | casing is shown. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a state after the tubular member is fitted into the fitting hole of the housing. It is sectional drawing equivalent to FIG. 8, Comprising: The state with which the 1st recessed part was filled with the adhesive agent is shown.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an aircraft 1 to which a camera 100 having a housing 10 (see FIG. 2) having a drip-proof structure according to the present embodiment is attached.

  The flying object 1 is a so-called drone, and includes a flying object body 2 and a propulsion device 3 that generates a propulsive force of the flying object 1.

  The aircraft body 2 includes a drive system (not shown) for controlling the aircraft 1 and the camera 100, a battery (not shown) serving as a drive source for the aircraft 1 and the camera 100, and the like. .

  The propulsion device 3 includes a plurality (six in this embodiment) of propellers 3a and a motor (not shown) that rotates the propellers 3a. The propellers 3a of the propelling device 3 are respectively attached to a plurality of support bodies 4 (six in this embodiment corresponding to the number of propellers 3a) extending from the flying body main body 2.

  The camera 100 is rotatably supported and supported by a support column 6 erected on a pedestal 5 attached to an upper portion of the flying body 2 via a support shaft 6a (see FIG. 4). The pedestal 5 has a plurality (four in this embodiment) of vibration absorbing mechanisms 7. Each vibration absorbing mechanism 7 is configured by an elastic body, and the elastic body is elastically deformed to absorb the vibration of the flying body 1 and prevent the vibration from being transmitted to the camera 100. is there.

  The camera 100 is attached to the flying body 2 such that a fitting hole 11a (see FIG. 2 and the like) provided in the housing 10 (see FIG. 2) of the camera 100 is positioned on the lower side. The camera 100 is attached to the flying body 2 so that the lens 16a is inclined slightly downward toward the lens 16a so that the lens 16a faces obliquely downward.

  Next, the configuration of the camera 100 will be described in detail. In the following description, the side of the camera 100 where a later-described lens 16a is located is referred to as a front side, and the side opposite to the lens 16a is referred to as a rear side. A direction perpendicular to both the front-rear direction and the up-down direction is referred to as the left-right direction, the left side when viewing the front side from the rear side is referred to as the left side, and the right side when viewing the front side from the rear side is referred to as the right side.

  As shown in FIG. 2, the camera 100 includes a housing 10 that houses a plurality of components (a circuit board 17 and a part of the electrical wiring 30 described later) that constitute the camera 100. The housing 10 covers the opening of the housing body 11 in a state where the housing body 11 is opened on the upper side and the component parts are assembled therein, and the component parts are assembled in the housing body 11. And a lid 12. Between the peripheral edge of the opening of the housing body 11 and the lid portion 12, a seal member 14 for preventing liquid such as water from entering the inside of the housing 13 is provided in the opening of the housing body 11. It is arrange | positioned along the peripheral part. The housing body 11 and the lid portion 12 are coupled by a plurality of (four in this embodiment) bolts 90. The housing body 11 and the lid 12 are made of, for example, resin.

  As shown in FIG. 2, the lens unit 16, the circuit board 17, and the speaker 18 are assembled in the housing body 11 (that is, the housing interior 13) as the above components. Further, in the housing body 11, one of a plurality (seven in this embodiment) of electrical wirings 30 that electrically connect the driving system of the flying body 2 and the circuit provided on the circuit board 17. Part is housed.

  As shown in FIGS. 2 and 4, the lens unit 16 is formed on the front wall 111 (see FIG. 4) of the housing body 11 so that the lens 16 a protrudes from the lens hole 11 b formed in the housing body 11. It is assembled with bolts. Although not shown in detail, a seal member for preventing liquid from entering the inside of the housing 13 is disposed between the peripheral portion of the lens hole 11 b and the lens unit 16.

  An imaging element 16b (see FIG. 4) including an image sensor or the like is provided in the lens unit 16, and the image formed by the lens 16a is converted into an electrical signal by the imaging element 16b. The image sensor 16b and the circuit board 17 are electrically connected by a flat cable 16c, and an electric signal output from the image sensor 16b is transmitted to a circuit provided on the electric circuit board 17.

  A lens protection sheet 19 for protecting the lens unit 16 is attached to a portion of the lens unit 16 opposite to the lens 16a.

  As shown in FIG. 2, the circuit board 17 is assembled inside the housing body 11 via the board holder 20. Specifically, the substrate holder 20 has a plurality (three in this embodiment) of bolts 91 and a plurality of (three in this embodiment corresponding to the number of bolts 91) formed on the substrate holder 20. By being fastened to a plurality of boss portions 21 (three in this embodiment corresponding to the number of bolts 91) formed on the bottom wall portion 112 of the housing body 11 through the bolt holes, The housing body 11 is assembled. The circuit board 17 has a plurality of (four in the present embodiment) bolts 92 and a plurality of bolt holes (four in the present embodiment corresponding to the number of the bolts 92) formed on the circuit board 17. The casing main body is passed through the substrate holder 20 by being fastened to a plurality of (four in this embodiment, corresponding to the number of bolts 92) boss portions 20a. 11 is assembled.

  The boss portion 21 provided in the housing body 11 has a bottom wall of the housing body 11 such that a gap is formed between the substrate holder 20 and the bottom wall portion 112 (see FIG. 4) of the housing body 11. It is formed so as to protrude upward from the portion 112. As will be described in detail later, a speaker 18 is disposed in the gap between the substrate holder 20 and the bottom wall portion 112 of the housing body 11, or a starting electrical wiring 31 described later among the plurality of electrical wirings 30. Have passed.

  On the circuit board 17, as shown in FIG. 2, the several electronic component which comprises the circuit containing the main integrated circuit 17a is arrange | positioned. A portion excluding the main integrated circuit 17 a on the surface of the circuit board 17 on which the circuit is formed (that is, the surface of the circuit board 17) is covered with the energization protection sheet 22. The energization protection sheet 22 is a protection sheet for preventing the electronic component and a heat dissipation sheet 23 (described later) from coming into contact with each other and energizing the electronic component and the heat dissipation sheet 23. The main integrated circuit 17 a is not covered with the energization protection sheet 22 because it is necessary to affix one end of the heat dissipation sheet 23.

  In addition, the plurality of electric wirings 30 are connected to the circuit board 17 by soldering or the like.

  Further, although not shown in the drawing, a socket into which a recording medium such as an SD card is inserted is coupled to the right rear portion of the back surface of the circuit board 17 so that the insertion slot faces the right side. In the state where the circuit board 17 is assembled to the housing body 11, the socket is configured so that the insertion port is located in the socket hole 11 c formed in the right side wall 113 of the housing body 11. Is arranged. The socket hole 11c is basically covered from the outside of the housing 10 by the socket-side cover 24 except when the recording medium is inserted into the socket insertion port. The socket is electrically connected to the circuit of the circuit board 17 by electric wiring different from the plurality of electric wirings 30. Note that the socket side cover 24 is assembled to the housing body 11 by bolts 93.

  One end of the heat radiation sheet 23 is affixed to the surface of the main integrated circuit 17a, while the other end is along the surface on the inside 13 side of the lid 12 (hereinafter referred to as the inner side surface) as shown in FIG. It is pasted. Two ribs 12a extending in the width direction and spaced apart from each other in the front-rear direction are formed on the inner side surface of the lid portion 12, and portions corresponding to the ribs 12a in the heat dissipation sheet 23 are formed as shown in FIG. , Slits 23a are respectively formed. Thereby, the heat-radiation sheet 23 is affixed on the whole inner surface of the cover part 12 so that each rib 12a may be avoided. The heat dissipation sheet 23 is made of, for example, graphite.

  The heat of the main integrated circuit 17a is transmitted to the lid 12 through the heat dissipation sheet 23 and is released from the lid 12 to the outside of the housing. Thereby, heat dissipation of the main integrated circuit 17a is performed.

  The speaker 18 is used, for example, when a warning sound is emitted to the operator of the flying object 1 when the insertion of the recording medium into the socket is weak. As shown in FIGS. 2 to 4, the speaker 18 is fitted in a cylindrical speaker mounting portion 11 d formed on the housing body 11 and assembled to the housing body 11. More specifically, as shown in FIG. 4, the speaker 18 is placed so as to be fitted to the speaker mounting portion 11 d, and the substrate holder 20 is placed from above and pressed against the substrate holder 20. As a result, the housing body 11 is assembled.

  As shown in FIG. 3, two speaker electrical wires 18a extend from the speaker 18. Each speaker electrical wiring 18 a has one end connected to the speaker 18 and the other end connected to the circuit board 17. Thereby, the speaker 18 and the circuit of the circuit board 17 are electrically connected.

  As shown in FIG. 4, a sound hole 11 e for making it easy to transmit a warning sound from the speaker 18 to the outside of the housing is formed in the speaker mounting portion 11 d of the bottom wall portion 112 of the housing body 11. doing. The sound hole 11e is covered with a speaker-side drip-proof seal 25 from the outside of the housing. The speaker-side drip-proof seal 25 is made of a material that can transmit vibration more easily than the housing 10. Even if the sound hole 11 e is covered with the speaker-side drip-proof seal 25, the sound hole 11 e is not formed. As compared with the case, a warning sound or the like from the speaker 18 is easily transmitted to the outside of the housing.

  As shown in FIG. 4, one end of the plurality of electrical wirings 30 is connected to the circuit board 17, and the other end passes through the fitting hole 11 a formed in the bottom wall portion 112 of the housing body 11. , Exposed outside the housing. The other ends of the plurality of electrical wires 30 are connected to a drive system (not shown) of the flying vehicle body 2.

  The plurality of electrical wirings 30 are roughly divided into two wiring groups. One wiring group is used for starting the camera 100 and the other wiring group is used for control other than the starting of the camera 100. In the present embodiment, the starting wiring group is configured by two electrical wirings 30 and the control wiring group is configured by five electrical wirings 30. Hereinafter, the two electrical wirings 30 for activation are referred to as electrical wirings 31 for activation, and the five electrical wirings 30 for control are referred to as electrical wirings 32 for control. When these are not distinguished, they are simply referred to as electrical wiring 30.

  As shown in FIGS. 3 and 4, the two start-up electrical wires 31 enter the inside of the housing 13 through the fitting holes 11a and then pass to the front side through the side of the speaker mounting portion 11d. It extends toward the upper side in the vicinity of the lens unit 16 and is connected to the circuit board 17. Each of the five control electric wires 32 enters the inside of the housing 13 through the fitting hole 11a and then extends upward and is connected to the circuit board 17.

  The fitting hole 11a of the housing 10 penetrates and holds all of the plurality of electrical wirings 30 and prevents liquid from entering the housing interior 13 to ensure the drip-proof property of the housing interior 13. For this purpose, a drip-proof connector 40 is fitted. As shown in FIGS. 3, 4, and 6 to 8, the drip-proof connector 40 includes a tubular member 42 that is fitted in the fitting hole 11 a of the housing 10 and all of the plurality of electric wires 30. And a wiring holding portion 41 for penetrating and holding. The drip-proof connector 40 is made of an elastically deformable member such as silicon resin. That is, the cylindrical member 42 and the wiring holding portion 41 that constitute the drip-proof connector 40 are configured by elastically deformable members such as silicon resin.

  As shown in FIGS. 3 and 6, the tubular member 42 has a rectangular tube shape with a rectangular cross section. When the cylindrical member 42 is not fitted in the fitting hole 11a, the cylindrical member 42 has a shape similar to that of the fitting hole 11a in which the shape of the cylindrical member 42 viewed from the cylinder axis direction is larger than that of the fitting hole 11a. It is configured to make. Specifically, in a state where the tubular member 42 is not fitted into the fitting hole 11a, the dimension in the longitudinal direction (corresponding to the left-right direction) of the cross-section of the tubular member 42 is the longitudinal direction of the fitting hole 11a ( The dimension in the short direction (corresponding to the front-rear direction) of the cross section of the cylindrical member 42 is also larger than the dimension in the short direction (corresponding to the front-rear direction) of the fitting hole 11a. . That is, the cylindrical member 42 is deformed so that a part of the cylindrical axis direction, specifically, a portion located at the same height position as the fitting hole 11a is uniformly reduced toward the inner side of the cylinder. The fitting hole 11a is fitted.

  As shown in FIGS. 4 and 8, the cylindrical member 42 is configured such that the length in the cylindrical axis direction is larger than the thickness of the fitting hole 11 a portion in the bottom wall portion 112 of the housing body 11. Has been. Thereby, when the cylindrical member 42 is fitted into the fitting hole 11 a, a part of the cylindrical member 42 is positioned in the housing interior 13.

  As shown in FIGS. 4 and 6 to 8, the wiring holding portion 41 is provided in the cylinder of the cylindrical member 42 and has a rectangular plate shape corresponding to the shape of the cylindrical member 42. . The wiring holding part 41 is integrally formed with the cylindrical member 42. Thereby, as shown in FIGS. 4 and 8, when the tubular member 42 is fitted into the fitting hole 11 a of the housing 10, the wiring holding portion 41 can be connected to the housing 10 via the tubular member 42. Can be assembled to. Note that the wiring holding portion 41 may have a columnar shape instead of a plate shape.

  As shown in FIGS. 6 to 8, the wiring holding portion 41 has a plurality of through holes 43 for allowing the plurality of electrical wirings 30 to pass through and hold in the cylinder axis direction. In the present embodiment, seven through holes 43 are formed in accordance with the number of electrical wirings 30. More specifically, in the state where the cylindrical member 42 is fitted in the fitting hole 11a, the two electric wirings for starting 31 are respectively held through in the portion positioned on the relatively front side of the wiring holding portion 41. The two front through holes 43a are formed, and the five rear through holes 43b for penetrating and holding the five control electric wires 32 are formed in a portion located relatively on the rear side of the wiring holding portion 41. Has been. As a result, as shown in FIG. 3 and FIG. 4, it is not necessary to avoid each control electrical wiring 32 when wiring each startup electrical wiring 31 so as to extend to the front side. Becomes easier.

  The diameter of each through-hole 43 is set to a different size corresponding to the diameter of the wiring that passes therethrough. Specifically, in the present embodiment, since the starting electrical wiring 31 is thicker (the diameter is larger) than the control electrical wiring 32, the front through hole 43a has a larger diameter than the rear through hole 43b. ing. As will be described later, in the present embodiment, when the cylindrical member 42 is fitted into the fitting hole 11a, each through hole 43 is configured to have a reduced diameter. Even after the diameter, the diameter of the front through hole 43a is larger than the diameter of the rear through hole 43b.

  Further, as shown in FIGS. 4 and 8, the wiring holding portion 41 is at least partially (in this case) in the cylindrical axis direction of the cylindrical member 42 in a state where the cylindrical member 42 is fitted in the fitting hole 11a. In the embodiment, all) are positioned at the intermediate portion in the cylinder axis direction in the cylinder of the cylindrical member 42 so that all are positioned at the same height as the bottom wall portion 112 of the housing body 11. As will be described in detail later, since the wiring holding portion 41 is located in the cylinder of the cylindrical member 42 as described above, when the cylindrical member 42 is fitted into the fitting hole 11a, the wiring holding portion 41 is used. The portion at the same height position as the bottom wall portion 112 is compressed in a direction orthogonal to the cylindrical axis direction, and the portions at the same height position as the bottom wall portion 112 in the plurality of through holes 43 are respectively compressed. The diameter is reduced.

  Furthermore, since the wiring holding part 41 is located in the cylinder of the cylindrical member 42 as described above, as shown in FIGS. 6 to 8, the interior of the casing of the drip-proof connector 40 in the cylinder axis direction is provided. A first recess 44 is formed on the 13th side. A second recess 45 is also formed on the side of the drip-proof connector 40 opposite to the inside 13 of the casing in the cylinder axis direction. In other words, the wiring holding portion 41 cooperates with the cylindrical member 42 to form a first recess 44 on the housing inner side 13 (upper side in the present embodiment) in the cylindrical axis direction, and the cylindrical shaft. It is located in the cylinder of the cylindrical member 42 so that the 2nd recessed part 45 is formed in the opposite side to the housing inside 13 of a direction. Of the first recess 44 and the second recess 45, at least the first recess 44 is filled with the adhesive A as shown in FIG. 9 after the tubular member 42 is fitted into the fitting hole 11a. This improves the drip-proof property of the housing interior 13 and prevents the electrical wiring 30 from being pulled out of the housing interior 13 after the tubular member 42 is fitted into the fitting hole 11a.

  As shown in FIGS. 4, 7, and 8, the cylindrical member 42 has an end portion on the opposite side (lower side in the present embodiment) of the cylindrical member 42 in the cylindrical axis direction of the cylindrical member 42. A flange 46 extending from the end toward the outside in the direction orthogonal to the cylinder axis direction is provided integrally with the cylindrical member 42. The flange 46 is also made of an elastic member such as silicon resin, like the cylindrical member 42 and the like. As shown in FIG. 4, the flange 46 is a fitting provided along the periphery of the fitting hole 11 a in the bottom wall portion 112 of the housing body 11 in a state where the cylindrical member 42 is fitted in the fitting hole 11 a. It is fitted in a mating recess 11f (only a part is shown in FIG. 4). A drip-proof double-sided tape 28 (see FIG. 2) is affixed to the flange 46 on the surface that contacts the fitting recess 11f, so that the tubular member 42 is fitted into the fitting hole 11a. Thus, in a state where the wiring holding portion 41 is assembled to the housing 10, the drip-proof connector 40 is difficult to be pulled out from the housing body 11, and passes between the flange 43 and the fitting recess 11 f. The liquid 13 is prevented from entering the interior 13 to improve the drip-proof property of the housing interior 13.

  As shown in FIGS. 2 and 4, in the bottom wall portion 112 of the housing body 11, the cylindrical member 42 is in a state in which each electric wiring 30 is penetrated and held in each through hole 43 of the wiring holding portion 41. The bottom cover 26 is attached with the sound hole 11e closed by the speaker-side drip-proof seal 25 while being fitted into the fitting hole 11a. The bottom cover 26 is attached to the bottom wall 112 of the housing body 11 by a plurality of (four in this embodiment) bolts 94.

  In the bottom cover 26, as shown in FIG. 2, wiring passage holes 26a through which the electric wirings 30 pass are formed. Around the wiring passage hole 26a, a protruding portion 26b that protrudes toward the housing interior 13 side is formed along the peripheral edge portion of the wiring passage hole 26a. As shown in FIG. 4, the protruding portion 26 b has the flange 46 connected to the bottom wall portion 112 (strictly, the bottom wall portion 112 in a state where the bottom cover 26 is attached to the bottom wall portion 112 of the housing body 11. The fitting recess 11f). Thereby, it is difficult to form a gap between the flange 46 and the fitting recess 11f, and the drip-proof property of the housing interior 13 is improved.

  As shown in FIGS. 4 and 5, on the surface of the bottom cover 26 opposite to the protruding portion 26b, the electric wires 30 exposed to the outside of the housing through the wiring passage holes 26a are connected to the rear side. A wiring guide portion 27 is formed for guiding toward the front. As shown in FIG. 5, a concave portion 27 a that is recessed from the upper side to the lower side is formed at the center in the width direction of the rear wall portion of the wiring guide portion 27. The concave portion 27a of the wiring guide portion 27 is guided by the wiring guide portion 27 so as to extend rearward in cooperation with the wiring pressing portion 11g provided at the rear end portion of the bottom wall portion 112 of the housing body 11. Each electric wiring 30 is pressed in the vertical direction. Thereby, even if each electric wiring 30 is pulled to the rear side, it is difficult to be pulled out from the inside 13 of the housing.

  Further, as shown in FIG. 4, a plurality of (seven in this embodiment) sound holes 26c are formed in the bottom cover 26 so that a warning sound or the like from the speaker 18 is easily transmitted to the outside of the housing. ing.

  Further, as shown in FIG. 2, an internal air pressure adjustment seal 29 for adjusting the air pressure inside the housing 13 is attached to the bottom wall portion 112 of the housing body 11. The internal pressure adjustment seal 29 is provided with a hole. The diameter of the hole is set to a diameter that allows air to pass but does not allow water to pass. Thus, it is possible to prevent water from entering the housing interior 13.

  Here, like the camera 100 of the present embodiment, a camera provided in the flying object 1 that is mainly used outside is sometimes used in rainy weather, and thus the housing 10 of the camera 100 is expensive. A drip-proof property is required. As a drip-proof structure for obtaining this high drip-proof property, the configuration of the drip-proof connector 40 is particularly problematic. This is because the drip-proof connector 40 is required to have a high drip-proof property after the camera 100 is assembled. On the other hand, when the camera 100 is assembled, the length of each electrical wiring 30 in the housing interior 13 is long. This is because it is required to be able to adjust the relative position between the wiring holding portion 41 and each electric wiring 30 in order to adjust the distance.

  That is, if each electric wiring 30 is configured to be fixed in advance to the wiring holding portion 41, a portion of each electric wiring 30 between the connection portion to the circuit board 17 and the wiring holding portion 41, that is, a housing. The portion accommodated in the body interior 13 may be too long, and when the tubular member 42 is fitted into the fitting hole 11a (that is, when the wiring holding portion 41 is assembled to the housing 10), Each electric wiring 30 is bent inside the housing 13, and a load is applied to a connection portion between the electric wiring 30 and the circuit board 17. In the worst case, the connection between the electric wiring 30 and the circuit board 17 may be disconnected. There is. Further, each electric wiring 30 cannot be accommodated in the inside 13 of the housing, and there is a possibility that the assembly itself of the wiring holding portion 41 to the housing 10 may be difficult.

  In order to prevent this, an appropriate length of a portion of each electric wiring 30 accommodated in the housing interior 13 is calculated in advance, and the length of each electric wiring 30 is determined in advance based on the calculation result. It is also possible. However, as in the present embodiment, the required length of the starter electrical wiring 31 and the control electrical wiring 32 are different in the housing 13, or the electrical wiring 30 (particularly the startup electrical wiring 31) When wiring is performed avoiding the speaker mounting portion 11d or the like, it is difficult to determine in advance the length of the portion of each electrical wiring 30 that is accommodated in the housing interior 13. Therefore, it is important to be able to adjust the relative position between the wiring holding portion 41 and each electrical wiring 30 during assembly.

  Therefore, in the present embodiment, when the tubular member 42 of the drip-proof connector 40 is fitted into the fitting hole 11 a of the housing 10, the wiring holding portion 41 is connected to the tubular member 42. It compresses in the direction orthogonal to a cylinder axis direction, and it comprises so that each through-hole 43 may be diameter-reduced, and also each diameter of each through-hole 43 after diameter reduction is diameter-reduced. It was made to become below the diameter of each electric wiring 30 before carrying out. More specifically, in a state where the electrical wiring 30 is not located in the through hole 43, the tubular member 42 is fitted into the fitting hole 11a of the housing 10 and the through hole 43 is reduced in diameter. The diameter of the hole 43 was set to be equal to or smaller than the diameter of the electric wiring 30 before the through hole 43 was reduced in diameter.

  This configuration will be described in detail with reference to FIGS. In the following description, the front through-hole 43a through which the start-up electrical wiring 31 passes as shown in FIGS. 7 and 8 will be described. Since the rear side through-hole 43b and the control electrical wiring 32 change in the same manner as the front side through-hole 43a and the start-up electrical wiring 31, which will be described below, detailed description is omitted.

  FIG. 7 shows a state before the tubular member 42 is fitted into the fitting hole 11 a of the housing 10 (that is, a state before the wiring holding portion 41 is assembled to the housing 10). At this time, the diameter of the front through-hole 43 a is the same as the diameter of each activation electrical wiring 31 or slightly larger than the diameter of each activation electrical wiring 31. Thereby, the electrical wiring 31 for starting can be pulled out and the relative position of the wiring holding part 41 and the electrical wiring 31 for starting can be adjusted. As a result, after the circuit board 17 to which the starting electrical wiring 31 is connected is assembled to the casing body 11 and after the tubular member 42 is fitted into the joint hole 11a, the startup inside the casing 13 is started. The length of the electrical wiring 31 can be adjusted. This facilitates the assembly of the wiring holding portion 41 to the housing 10 and also allows the tubular member 42 to be fitted into the fitting hole 11a of the housing 10 (that is, the wiring holding portion 43 is attached to the housing 10). The occurrence of a load on the starting electrical wiring 31 during assembly) can be suppressed. The starting electrical wiring 31 is composed of a conducting wire 31a and a covering portion 31b covering the conducting wire 31a, and the diameter of the starting electrical wiring 31 means a diameter including the covering portion 31b. Further, in the same state as the diameter of the front through hole 43a and the diameter of the starting electrical wiring 31, the starting electrical wiring 31 passes through the front through hole 43a, and the front through hole 43a is pushed by the starting electrical wiring 31. As a result, the case where the diameter of the front side through-hole 43a and the diameter of the starting electrical wiring 31 are the same is included.

  As described above, the cylindrical member 42 is configured so that the shape seen from the cylindrical axis direction is larger than the fitting hole 11a in a state where the tubular member 42 is not fitted into the fitting hole 11a. When the shaped member 42 is fitted into the fitting hole 11a of the housing 10, the portion of the tubular member 42 located at the same height position as the fitting hole 11a is reduced toward the inside of the cylinder. On the other hand, the wiring holding portion 41 is assembled in the fitting hole 11a so that at least a part thereof is located at the same height as the bottom wall portion 112 of the housing body 11 in the cylindrical axis direction. Since the tubular member 42 is located in the middle portion of the tubular member 42 in the tubular axial direction, the wiring holding portion 41 is located in a portion of the tubular member 42 that is contracted inside the tube. Thereby, the wiring holding part 41 is compressed by the cylindrical member 42.

  As the wiring holding part 41 is compressed, the front through hole 43a is reduced in diameter as shown in FIG. Due to this diameter reduction, the inner peripheral edge portion of the front through hole 43a of the wiring holding portion 41 tries to bite into the covering portion 31b of the starting electrical wiring 31, but due to the repulsion from the starting electrical wiring 31, FIG. As shown, the diameter of the front through-hole 43a is deformed so as to be the same as the diameter of the starting electrical wiring 31. As a result, the inner peripheral edge portion of the front through hole 43a of the wiring holding portion 41 and the covering portion 31b of the starting electrical wiring 31 are brought into close contact, and the cylindrical member 42 is fitted into the fitting hole 11a of the housing 10. No gap is formed between the wiring holding portion 41 and the portion located in the front through hole 43 a in the starting electrical wiring 31. As a result, after the tubular member 42 is fitted into the fitting hole 11a of the housing 10, the liquid is prevented from entering the inside 13 of the housing, so that high drip-proof property can be ensured. . The diameter of the front through hole 43a before the diameter reduction (that is, before the tubular member 42 is fitted into the fitting hole 11a) is the diameter of the starting electrical wiring 31 before the diameter of the front through hole 43a is reduced. And the diameter of the front through-hole 43a after the diameter reduction in a state where the start-up electric wiring 31 is not located in the front through-hole 43a is larger than the diameter of the front through-hole 43a before the diameter reduction of the front through-hole 43a. In the case where the diameter is the same as the diameter 31, the front through-hole 43 a comes into close contact with the starting electrical wiring 31 without being deformed by repulsion from the starting electrical wiring 31.

  The rear through-hole 43b and the control electrical wiring 32 are different from the front through-hole 43a and the start-up electrical wiring 31 only in the respective diameters. 43b ”and“ starting electrical wiring 31 ”may be replaced with“ control electrical wiring 32 ”.

  Therefore, in this embodiment, while ensuring the high drip-proof property of the housing | casing 10, while attaching the wiring holding part 43 to the housing | casing 10 easily, each electricity at the time of assembling the wiring holding part 41 to the housing | casing 10 is used. Generation of a load on the wiring 30 can be suppressed.

  In the present embodiment, the cylindrical member 42 has a shape similar to that of the fitting hole 11a in which the shape of the cylindrical member 42 viewed from the cylinder axis direction is larger than the fitting hole 11a. When the cylindrical member 42 is fitted into the fitting hole 11a, the upper cylinder member 42 is uniformly reduced to the inner side of the cylinder. As a result, the wiring holding portion 41 is uniformly compressed and the through hole 43 is also uniformly reduced in diameter, so that there is a further gap between the portion of the electrical wiring 30 located in the through hole 30 and the wiring holding portion 41. It becomes difficult to form. As a result, the drip-proof property of the housing 10 can be further improved.

  Furthermore, in the present embodiment, the wiring holding portion 41 cooperates with the cylindrical member 42 on the housing interior 13 side (upper side in the present embodiment) in the mounting direction of the wiring holding portion 41 to the housing 10. Since the first recess 44 is formed, the portion of the cylindrical member 42 that constitutes the first recess 44 is inserted into the housing interior 13 through the fitting hole 11a of the housing 10. It can be deformed to make it easier. Thereby, if the part which comprises the 1st recessed part 44 in the cylindrical member 42 is inserted in the inside 13 of a housing | casing, a housing | casing can be easily carried out, keeping the remaining part of the cylindrical member 42 along the periphery of the fitting hole 11a. It can be inserted into the interior 13. Thereby, the assembly | attachment of the wiring holding | maintenance part 41 can be made still easier.

  Further, as shown in FIG. 9, after the wiring holding portion 41 is assembled to the housing 10, if the adhesive A is filled in the first recess 44, the drip-proof property of the housing interior 13 is improved, It is possible to make it difficult for the electrical wiring 30 to be pulled out from the inside 13 of the housing after the wiring holding portion 41 is assembled to the housing 10.

  Furthermore, in the present embodiment, the camera 100 is attached to the flying body 2 so that the fitting hole 11a provided in the housing 10 of the camera 100 is located on the lower side. Even if the flying object 1 is operated, rainwater can be prevented from entering the inside 13 of the housing.

  Therefore, in the present embodiment, the tubular member 42 that is elastically deformable and is fitted in the fitting hole 11a formed in the housing 10, and is fixed in the cylinder of the tubular member 42, The tubular member 42 includes a through-hole 43 for allowing the wiring 30 to pass through and hold in the tube axial direction of the tubular member 42, and includes a plate-like wiring holding portion 41 that can be elastically deformed. The shape seen from the axial direction is formed so as to be larger than the fitting hole 11a of the housing 10, and when fitted into the fitting hole 11a of the housing 10, the wiring holding portion 41 is connected to the cylindrical shaft. The through hole 43 is configured to be compressed in a direction perpendicular to the direction to reduce the diameter of the through hole 43. The diameter of the through hole 43 after the diameter reduction is the electric wiring 30 before the through hole 43 is reduced in diameter. Therefore, the housing 1 of the wiring holding portion 41 is secured while ensuring the high drip-proof property of the housing 10. Together to facilitate assembly to the wiring holding part 41 can suppress the occurrence of load on the electric wires 30 when assembled to the housing 10.

  The present invention is not limited to the embodiment described above, and can be substituted without departing from the spirit of the claims.

  For example, in the above-described embodiment, the inner peripheral edge portion of the through hole 43 has been deformed so that the diameter of the through hole 43 is the same as the diameter of the electric wire 30 due to the repulsive force from the electric wire 30. Not limited to this, when the through hole 43 is reduced in diameter, the inner peripheral edge portion of the through hole 43 may bite into the covering portion of the electrical wiring 30. In this case, even when the electric wiring 30 is located in the through hole 43, the diameter of the through hole 43 after the diameter reduction is smaller than the diameter of the electric wiring 30 before the through hole 43 is reduced in diameter. Even in this case, the inner peripheral edge portion of the through hole 43 and the electric wiring 30 are in close contact with each other, and no gap is formed between the portion of the electric wiring 30 located in the through hole 43 and the wiring holding portion 41. The high drip-proof property of the housing 10 can be obtained.

  In the above-described embodiment, only the first recess 44 is filled with the adhesive. However, the present invention is not limited to this, and the second recess 45 may be filled with the adhesive. Thereby, the drip-proof property of the housing | casing 10 can further be improved.

  Furthermore, in the above-described embodiment, the drip-proof structure of the present invention is applied to the casing 10 having a plurality of electrical wirings 30. However, the present invention is not limited to this, and only one electrical wiring 30 is provided. It can also be applied to.

  In the above-described embodiment, the wiring holding part 41 and the cylindrical member 42 are integrally formed. However, the invention is not limited thereto, and the wiring holding part 41 and the cylindrical member 42 may be configured separately. . At this time, it is desirable to fix the wiring holding part 41 in the cylinder of the cylindrical member 42 with an adhesive or the like. In this configuration, the wiring holding part 41 and the cylindrical member 42 can use members having different elastic coefficients.

  Furthermore, in the above-mentioned embodiment, although the fitting hole 11a of the housing | casing 10 was rectangular shape, another polygonal shape and circular shape may be sufficient. In this case, it is necessary to change the shape of the wiring holding part 41 and the cylindrical member 42 of the drip-proof connector 40 in accordance with the shape of the fitting hole 11a.

  In the above-described embodiment, the cylindrical member 42 has a shape similar to that of the fitting hole 11a as viewed from the cylindrical axis direction of the cylindrical member 42. If it can prevent that a clearance gap is formed between the part located in the through-hole 43 in this, and the wiring holding part 41, the shape seen from the said cylinder-axis direction of the cylindrical member 42 will be a fitting hole. It does not have to be similar to 11a. However, in order to uniformly reduce the diameter of the through hole 43, it is desirable that the shape of the cylindrical member 42 seen from the cylindrical axis direction is similar to the fitting hole 11a.

  The above-described embodiments are merely examples, and the scope of the present invention should not be interpreted in a limited manner. The scope of the present invention is defined by the scope of the claims, and all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  The present invention prevents the liquid from entering the inside of the housing that houses a part of the electrical wiring inside, and the electrical wiring is provided at the portion where the electrical wiring is exposed from the inside of the housing to the outside of the housing. It is useful as a drip-proof structure of the housing for penetrating and holding.

DESCRIPTION OF SYMBOLS 1 Flying object 10 Housing | casing 11a Fitting hole (hole part)
13 Inside of the housing 30 Electrical wiring 41 Wiring holding portion 42 Cylindrical member 43 Through hole 44 First recess (recess formed on the inside of the housing in the cylinder axis direction)
A Adhesive

Claims (6)

Prevents liquid from entering the interior of the housing that houses a part of the electrical wiring inside, and penetrates and holds the electrical wiring at a portion where the electrical wiring is exposed from the inside of the housing to the outside of the housing. A drip-proof structure for the housing,
An elastically deformable tubular member fitted into a hole formed in the housing; and
A columnar or plate-like wiring holding part that is fixed in the cylinder of the cylindrical member and has a through hole for passing through and holding the electric wiring in the cylinder axial direction of the cylindrical member, and is elastically deformable. And comprising
The cylindrical member has a shape that is larger than the hole portion when viewed from the cylindrical axis direction, and when the tubular member is fitted into the hole portion of the casing, the wiring holding portion is It is configured to compress in a direction orthogonal to the direction and reduce the diameter of the through hole,
A drip-proof structure for a housing, wherein a diameter of the through hole after the diameter reduction is equal to or less than a diameter of the electric wiring before the diameter of the through hole is reduced. In the drip-proof structure of the housing according to claim 1,
There are multiple electrical wirings,
A drip-proof structure for a housing, wherein a plurality of the through holes are provided corresponding to the number of the electrical wirings. In the drip-proof structure of the housing according to claim 1 or 2,
The drip-proof structure for a casing, wherein the cylindrical member has a shape similar to the hole portion, the shape of which is viewed from the cylinder axis direction, which is larger than the hole portion. In the drip-proof structure of the housing according to any one of claims 1 to 3,
The wiring holding portion is located in the cylindrical member so that a concave portion is formed on the inner side of the casing in the cylindrical axis direction in cooperation with the cylindrical member. Drip-proof structure of the housing. In the drip-proof structure of the housing according to claim 4,
A drip-proof structure for a housing, wherein the recess is filled with an adhesive. In the drip-proof structure of the housing according to any one of claims 1 to 5,
The housing is a camera housing attached to the flying object,
Further, the drip-proof structure of the case, wherein the case is attached to the flying body so that the hole portion is located on the lower side.

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