JP2019105488A - Waterproof structure - Google Patents

Abstract

To provide a waterproof structure capable of improving water-tightness between an upper case and a lower case so as to reliably prevent a water leak.SOLUTION: A waterproof structure includes: an elastic seal member 6; a first member having a groove 53 for storing the seal member 6; and a second member 2 where a fitting wall 22 to pressurize the seal member 6 against the groove 53 is arranged at a position corresponding to the groove 53. The groove 53 has projection parts 534 that are arranged at corner parts 53c forming a bottom surface 53a and side surfaces 53b so as to regulate a position of the seal member 6 to a position of the fitting wall 22. The groove 53 has a bending groove part and the projection parts 534 are arranged in the bending groove part.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a waterproof structure, and more particularly to a waterproof structure of an instrument device mounted on a vehicle such as a two-wheeled vehicle.

  Generally, an instrument device for measuring a vehicle speed and the like is disposed in front of an occupant of a vehicle such as a two-wheeled vehicle. As one of such instrument devices, an analog instrument device is known. The analog-type instrument device forms a housing by an upper case on the occupant (viewer) side and a lower case located behind the upper case as viewed from the occupant. A concave groove is provided on the outer periphery of the lower case, and a seal member having a circular cross section is inserted into the groove, and the inserted seal member is pressed toward the bottom of the groove by the reduced thickness portion of the upper case. As a prior art regarding the waterproof structure of such a meter, there exists a technique disclosed by patent document 1. FIG.

JP, 2011-46292, A

  However, when screwing the upper case and lower case of the instrument device, the groove has a bending groove portion that is bent because it needs to be disposed away from the screw fixing portion, so the seal member bends in this bending groove portion In this case, the seal member is stretched, the thickness of the seal member is reduced, the seal member is biased to the inside of the bent groove portion of the groove, the contact between the reduced thickness portion and the seal member is eccentric, and sufficient water blocking function can not be exhibited. There was a problem that.

  Then, this indication is made in view of the above-mentioned problem, can improve the water tightness between the upper case and the lower case, and provides a waterproofing structure which can prevent water leak certainly. The purpose is

  The present disclosure squeezes the seal member 6 into the groove 53 at a position corresponding to the elastic seal member 6, the first member 1 having the groove 53 for accommodating the seal member 6, and the groove 53. In the waterproof structure including the second member 2 having the fitting wall 22 for fitting, the groove 53 fits the position of the seal member 6 in the corner 53 c forming the bottom surface 53 a and the side surface 53 b. The projection 53 is characterized in that it has a projection 534 for restricting to the position of the joint wall 22, the groove 53 has a bending groove 533, and the projection 534 is in the bending groove 533.

  According to the waterproof structure according to the present disclosure, the water tightness between the upper case and the lower case can be improved, and water leakage can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS The front view of the instrument for vehicles which shows 1st Embodiment of this indication. FIG. 2 is a cross-sectional view taken along the line A-A in FIG. The enlarged view shown to the principal part C in FIG. FIG. 3 is a back view of the upper case shown by arrow B in FIG. 2; The enlarged view shown to the principal part D in FIG. The enlarged view which shows 2nd Embodiment of this indication of the principal part D in FIG.

  A vehicular instrument 100 according to an embodiment of the present disclosure will be described below based on the attached FIGS. 1 to 6. In the description, the direction in which the user sitting on the vehicle driver's seat is viewed from the vehicle instrument 100 is referred to as "front" and the back side is referred to as "rear".

  A first embodiment of the present disclosure is shown in FIGS. The vehicle instrument 100 is viewed from the occupant side and has a substantially rectangular outer shape and is disposed in front of the occupant, and a display unit 3 for displaying information such as the vehicle speed to the occupant is disposed at the center. And a lower case (second member) 2 that is located behind the display unit 3 and that houses the display unit 3.

  The upper case 1 is disposed in front of the display unit 3 and is disposed between the transmissive panel 4 that sees through the display unit 3 and the transmissive panel 4 and the display unit 3 to surround the space between them in the circumferential direction. It consists of a look back 5.

  The transmissive panel 4 is made of, for example, a transparent material (for example, a synthetic resin such as acrylic or an inorganic glass), and has a function as a covering member that covers the opening 51 of the cover 5. The transmissive panel 4 is configured to allow the display unit 3 to be visible to the occupant.

  The facing 5 is made of opaque plastic such as black (for example, polypropylene etc.), surrounds the space between the display unit 3 and the transmissive panel 4 in the circumferential direction, and has an opening 51 through which the display unit 3 can pass. . Further, the transmission panel 4 and the back cover 5 are integrally formed by insert molding or the like.

  Further, as shown in FIGS. 2 and 4, the facing 5 has screw holes 52 into which screws V, which are fasteners such as screws, are inserted at each corner of the outer shape on the rear surface side. In addition, the facing 5 has a groove (groove) 53 having a substantially U-shaped cross section (concave shape) that is opened toward the lower case 2 at the outer periphery on the rear surface side.

  As shown in FIG. 4, the groove portion 53 adjacent to the screw hole 52 is disposed along the shape of the screw hole 52 so as to pass through the inside of the look back 5 of the screw hole 52. Further, the groove portion 53 connects the outer peripheral groove portion 531 provided along the outer shape of the facing 5, the fixing portion groove portion 532 provided along the shape of the screw hole 52, the outer peripheral groove portion 531 and the fixing portion groove portion 532, And a bent groove portion 533 which is bent to be continuous between the inner sides. The outer peripheral groove portion 531 is formed in a substantially linear shape. The fixing portion groove portion 532 is formed in a substantially arc shape. The bending groove portion 533 is formed in a substantially arc shape formed with a radius smaller in bending radius than the fixing portion groove portion 532.

  Further, in the groove portion 53, an annular seal member 6 made of a rubber material or the like and having elasticity is fitted. As shown in FIG. 3A, the sealing member 6 is formed in a substantially circular shape in cross section. Further, as shown in FIG. 3B, the seal member 6 is crushed by the groove portion 53 by a fitting wall 22 described later, and seals the space between the upper case 1 and the lower case 2.

  The groove 53 has a projection 534 at the corner between the bottom surface 53a and the side surface 53b of the groove 53 for regulating the position of the seal member 6 to the center position of the bottom surface 53a. The protrusions 534 are provided in a pair on both sides of the seal member 6. In addition, at least one set of the protruding portion 534 is provided in each of the outer peripheral groove portion 531, the fixed portion groove portion 532 and the bending groove portion 533.

  Further, as shown in FIG. 5, the width W1 of the protrusion 534 located on the inner diameter side of the bending groove 533 in the occupant viewing direction is the protrusion 534 located on the outer diameter side of the bending groove 533 and the outer peripheral groove 531. It is wider than the width W 2 of the protrusion 534 located in the groove 532, and as a result, contacts the seal member 6 in a larger area than the protrusion 534 located in the fixed portion groove 532.

  Further, the protrusion amount H1 of the protrusion 534 located in the bending groove 533 in the occupant visual direction is formed to be higher than the protrusion amount H2 of the protrusion 534 located in the outer peripheral groove 531 and the fixed portion groove 532.

  The display unit 3 includes a liquid crystal display 31 including a liquid crystal display panel, a backlight unit, a light diffusion plate, a frame body and the like, and a wiring board 32 disposed behind the liquid crystal display 31. -Display vehicle information such as warning lights as an image. And, it is provided so as to be visible to the occupant from the opening 51 of the upper case 1.

  The wiring board 32 is formed of a hard wiring board obtained by applying a wiring pattern to a flat glass epoxy base material such as FR-4 (Flame Retardant-4), for example, and a command signal for driving and controlling the liquid crystal display 31 , And various circuit components such as resistors, capacitors, etc. are connected conductively to the wiring pattern.

  The lower case 2 is made of impermeable synthetic resin such as black (for example, polypropylene etc.), and is formed in a box shape with the front cover 5 opened. The lower case 2 houses the display unit 3 inside a box-like shape. The lower case 2 also has a through hole 21 through which the screw V passes at a position corresponding to the screw hole 52. Further, a screw V is inserted into the through hole 21 from the rear and fixed to the cover 5. Thus, the vehicle instrument 100 is a closed case by the upper case 1 and the lower case 2.

  The lower case 2 also has a convex fitting wall 22 at a position corresponding to the groove 53 for crushing the seal member 6 into the groove 53. The fitting wall 22 is provided along the outer shape of the facing 5 as well as the shape of the groove 53 and is disposed so as to pass through the inside of the screw hole 52.

  By forming in this manner, the projecting portion 534 in the bending groove portion 533 contacts the seal member 6 with a large area, thereby locally stretching the seal member 6 and reducing the thickness of the seal member 6. Therefore, the contact between the fitting wall 22 and the seal member 6 is ensured, the water tightness between the upper case 1 and the lower case 2 is improved, the water leakage is prevented, and a waterproof structure having high merchandality is provided. Can.

  Further, in the bending groove portion 533, the protruding portion 534 is formed to be higher than the protruding amount H2 of the protruding portion 534 located in the outer peripheral groove portion 531 and the fixing portion groove portion 532 so that the seal member 6 is locally stretched. Since the center position of the groove portion 53 can be maintained as the thickness of the wall 6 is reduced, the contact between the fitting wall 22 and the seal member 6 becomes reliable, and the water tightness between the upper case 1 and the lower case 2 is improved. It is possible to prevent water leakage and provide a waterproof structure having high merchandising properties.

  Further, by having a fixing tool such as a screw V fixed to the upper case 1 and the lower case 2 at a position adjacent to the fixing portion groove portion 532 or the bending groove portion 533, the fitting wall 22 and the seal member 6 contact each other. Thus, the water tightness between the upper case 1 and the lower case 2 can be improved, water leakage can be prevented, and a waterproof structure having a high commercial value can be provided.

  A second embodiment of the present disclosure is shown in FIG. The same parts as those in the first embodiment described above and the equivalent parts will be described with the same reference numerals.

  In the first embodiment, the width W1 of the protrusion 534 located on the inner diameter side of the bending groove 533 is wider than the width W2, and the seal member has a larger area than the protrusion 534 located in the fixed portion groove 532. In the second embodiment, the width W3 of the protrusion 534 is formed to be the same width as the width W1. However, the distance between the plurality of protrusions 534 is closely and continuously provided, so that the seal member 6 contacts the seal member 6 with a larger area than the protrusions 534 located in the fixing portion groove 532.

  In the bending groove portion 533, when the projecting portion 534 abuts on the seal member 6 with a large area, the seal member 6 can be prevented from locally stretching and the thickness of the seal member 6 can be prevented from becoming thin. Thus, the contact between the sealing member 6 and the sealing member 6 is ensured, the water tightness between the upper case 1 and the lower case 2 is improved, the water leakage is prevented, and a waterproof structure having a high commercial value can be provided.

  Although the waterproof structure of the present invention has been described by way of example with the configuration of the above-described embodiment, the present invention is not limited to this, and the scope of the present invention is not deviated from other configurations. Of course, various improvements and design changes are possible.

  For example, the cross section of the groove portion 53 is substantially U-shaped, but may be substantially U-shaped in cross section, and the shape is not limited. The sealing member 6 has a substantially circular cross section, but may have a rectangular cross section, regardless of its shape.

  The present disclosure relates to an instrument device for a vehicle, and can be applied to, for example, a waterproof structure mounted on a mobile body equipped with a car or a motorcycle, or an agricultural machine or a construction machine.

1 Upper case (first member)
2 Lower case (second member)
21 Through hole (fixed part)
22 mating wall 52 screw hole (fixed part)
53 Grooves (grooves)
53a bottom surface 53b side surface 53c corner 533 bending groove 534 protrusion 6 sealing member H2 protrusion amount

Claims (3)

A seal member having elasticity;
A first member having a groove for receiving the seal member;
A second member having a fitting wall for collapsing the sealing member into the groove at a position corresponding to the groove;
The groove has, at an angle between a bottom surface and a side surface, a protrusion which regulates the position of the seal member to the position of the fitting wall,
The said groove | channel has the crookedly bent groove part, The said protrusion part has a waterproof structure characterized by having at least in the said crooked groove part. The waterproof structure according to claim 1, wherein the protrusion of the bending groove abuts on the seal member with a larger area than the protrusion other than the bending groove. The waterproof structure according to any one of claims 1 to 2, further comprising a fixing portion for fixing the first member and the second member at a position adjacent to the bending groove portion.

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