JP2007298360A - Casing and on-vehicle instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a casing capable of improving reliability and work efficiency by preventing external pressure from being easily applied thereto. <P>SOLUTION: When a back cover 2 is attached to a body case 1, tips parts 21a of lock claws 21 arranged on the insides of sidewalls of the back cover 2 are locked to inner edge parts 11a1 of flat parts 11a extending inward from the sidewalls 1a of the body case 1. That is, since engagement parts are prevented from being exposed to the outside of the sidewalls 1a of the body case 1 and the back cover 2, external pressure is difficult to be applied to the engagement parts. When a facing 3 is attached to the body case 1, tongue pieces 31 of the facing 3 completely cover cutout parts 11 of the body case 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a casing and a vehicle-mounted instrument having the casing.

  The casing that forms the outer shape of the vehicle-mounted instrument or the like is usually configured by combining a plurality of casing members. For example, in an in-vehicle instrument, a main body case, a back cover, a turn, a front glass, and the like are combined to form an outer shape.

  FIG. 9 is an exploded perspective view showing a part of this type of vehicle-mounted instrument. FIG. 9 shows a portion corresponding to the lower left corner when this type of conventional vehicle-mounted instrument is viewed from the front side. 10 is an exploded perspective view in which the vicinity of the claw receiving portion of the main body case and the locking claw of the back cover in FIG. 9 is enlarged. FIG. 11 is a perspective view showing a state where the main body case, the back cover, and the turn-back are integrated in the same part as FIG. 10. 12 is a cross-sectional view taken along line BB in FIG.

  The conventional vehicle-mounted instrument is comprised including the main body case 91, the back cover 92, and the turning 93 as shown in FIG. A dial 94 is attached to the main body case 91. The front glass covering the front side of the facing 93 is omitted.

  As shown in FIG. 12, the horizontally long box-shaped main body case 91 is mounted with a dial plate 94 and houses main electronic components such as a board 95, a pointer 96, a motor 97, and a light source 98. As shown in FIG. 9, a claw receiving portion 911 that receives the locking claw 921 of the back cover 92 and a claw receiving portion 912 that receives the locking claw 932 of the turning 93 are provided on the side wall of the main body case 91. One or a plurality of the claw receiving portions 911 and the claw receiving portions 912 are disposed at appropriate positions on the side wall of the main body case 91.

  As shown in FIGS. 9 and 10, a locking claw 921 that engages with a claw receiving portion 911 of the main body case 91 is provided on the side wall of the horizontally long back cover 92. The distal end portion 921a of the locking claw 921 has a wedge shape. One or a plurality of such locking claws 921 are disposed at appropriate positions on the side wall of the back cover 92 so as to correspond to the claw receiving portions 911.

  As shown in FIG. 9, locking claws 932 are provided on the side walls of the horizontally long facing 93 corresponding to the main body case 91 so as to extend toward the main body case 91 side. The locking claw 932 has a shape that can be engaged with the claw receiving portion 912 of the main body case 91. One or a plurality of such locking claws 932 are disposed at appropriate positions on the side wall of the turn-back 93 so as to correspond to the positions of the claw receiving portions 912 of the main body case 91.

  In such a configuration, first, the locking claw 921 of the back cover 92 advances in the direction indicated by the upward arrow in FIG. 9 and engages with the claw receiving portion 911 of the main body case 91. Further, the latching claw 932 of the turning 93 advances in the direction indicated by the downward arrow in FIG. 9 and engages with the claw receiving portion 912 of the main body case 91 as shown in FIGS. As a result, the main body case 91, the back cover 92, and the turning 93 are integrated.

Note that an on-vehicle instrument configured as described above is also proposed in Patent Document 1 below.
JP 2001-174292 A

  However, in the case of the conventional vehicle-mounted instrument, as can be seen from FIGS. 11 and 12, the main body case 91 and the back cover 92 are engaged with the claw receiving portion 911 and the locking claw 921 that protrude from the side wall. Are fixed. That is, the engagement portion between the main body case 91 and the back cover 92 in the housing of the conventional vehicle-mounted instrument protrudes from the side wall as shown by D in FIG. In particular, since the back cover 92 is located at the end of the vehicle-mounted instrument, it is a member that is subject to unexpected external pressure. Therefore, conventionally, there has been a problem that reliability and workability are not good.

  Therefore, in view of the present situation described above, an object of the present invention is to provide a housing that is difficult to apply external pressure and can improve reliability and workability.

  The housing according to claim 1, which has been made to solve the above-mentioned problem, has a first housing member having a side wall that is exposed to the outside while the bottom surface is open, and an entire bottom surface that is open in the first housing member, or A second housing member attached so as to cover a part thereof, wherein the second housing member is disposed inside the first housing member from an opened bottom surface of the first housing member. And a locking portion that can be locked to a part of the first housing member in the interior.

  The housing according to claim 2, which has been made to solve the above-described problem, is the housing according to claim 1, wherein the first housing member extends from the side wall in an inner direction perpendicular to the side wall. And the locking portion is locked to the convex portion.

  The housing according to claim 3, which is made to solve the above-described problem, is the housing according to claim 2, wherein a side wall of the first housing member is provided with a notch, and the convex portion Is integrally formed on the inner surface of the notch.

  The housing according to claim 4, which has been made to solve the above-described problem, is attached to the housing according to claim 3 on the side of the first housing member opposite to the side on which the second housing member is attached. The third casing member is integrally provided with the third casing member that is shaped so as to cover the notch in a state where the third casing member is attached to the first casing member. And a tongue piece.

  The vehicle-mounted instrument of Claim 5 made | formed in order to solve the said subject is a vehicle-mounted instrument which has a housing | casing of Claim 4, Comprising: The said 1st housing member accommodates the main electronic components of the said vehicle-mounted instrument. And the second casing member is a back cover attached to a side of the main body case opposite to the side on which the dial plate is mounted, and The three housing members are attached to a side of the main body case on which the dial is mounted, and are configured to cover up other than the display portion of the measurement value of the dial.

  According to the first aspect of the present invention, the second casing member is inserted into the first casing member from the opened bottom surface of the first casing member, and is engaged with a part of the first casing member inside the first casing member. It has a locking part that can be stopped. Therefore, the locking part is not exposed and external pressure is not easily applied to the locking part. Therefore, reliability is improved.

  According to invention of Claim 2, the convex part extended in the internal direction perpendicular | vertical to this side wall from the side wall of the 1st housing member is provided, and a latching | locking part latches to this convex part. Therefore, the assembly of both members becomes easy. Therefore, workability is improved.

  According to invention of Claim 3, since the notch part is provided in the side wall of the 1st housing member, the latching condition of the latching part with respect to a convex-shaped part is confirmed via this notch part. Can do. Therefore, workability is further improved.

  According to invention of Claim 4, the notch part which exhibited the effect in Claim 3 can be covered with the tongue piece part of a 3rd housing member. Therefore, it is possible to prevent intrusion of dust from the cutout portion while improving workability by the cutout portion.

  According to the fifth aspect of the present invention, it is possible to prevent the back cover located at the end of the in-vehicle instrument that is subject to unexpected external pressure from falling off. Further, by effectively using the payback, it is possible to prevent dust from entering the inside of the instrument without adding a new member. Therefore, it can be used for a vehicle-mounted instrument, and a remarkable effect can be acquired.

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

  First, the external shape of the vehicle-mounted instrument which concerns on one Embodiment of this invention is demonstrated using FIG. FIG. 1 is an exploded perspective view showing a part of an on-vehicle instrument according to an embodiment of the present invention. The external shape of the vehicle-mounted instrument is a horizontally long box shape as is well known, and FIG. 1 shows a portion corresponding to the lower left corner when the vehicle-mounted instrument is viewed from the front side. In this specification, the front side means a viewer side such as a driver.

  As shown in FIG. 1, the casing constituting the outer shape of the vehicle-mounted instrument includes a main body case 1 as a first casing member, a back cover 2 as a second casing member, and a payback 3 as a third casing member. It is comprised including. A dial 4 is attached to the main body case 1. The on-vehicle instrument includes a front glass that covers the front side of the dial 3 but is omitted because it is not necessary for understanding the present invention.

  The main body case 1 is made of, for example, white resin and has a horizontally long box shape. The main body case 1 is fitted with a dial 4 and accommodates main electronic components (see FIG. 4) such as a substrate 5, a pointer 6, a motor 7, a light source 8, and the like. A notch 11 is provided at a part of the peripheral edge that is a boundary between the side wall of the main body case 1 and the front surface on which the facing 3 is attached. A locking claw 21 of the back cover 2 is locked to a part of the notch 11, and will be described in detail later with reference to FIG.

  On the side wall of the main body case 1, a claw receiving portion 12 that receives the latching claw 32 of the facing 3 is provided. A plurality of the notches 11 and the claw receiving portions 12 are arranged on the side wall of the main body case 1 and the peripheral edge. A flange portion 15 having a predetermined height is formed along the peripheral edge portion. This is for aligning the side wall of the facing 3 and the side wall of the main body case 1.

  The back cover 2 is made of white resin, for example, and has a horizontally long saucer shape in accordance with the main body case 1. That is, the side facing the main body case 1 is open. The back cover 2 is attached to the side opposite to the side on which the dial 4 is mounted in the main body case 1. The side walls of the back cover 2 are formed so as to be flush with each other when integrated with the main body case 1. A locking claw 21 that engages with a part of the cutout portion 11 of the main body case 1 is provided on the side wall of the back cover 2. A part of the side wall of the back cover 2 is slightly recessed in the inner direction, and a locking claw 21 is provided so as to extend from the recessed portion toward the main body case 1 side. The distal end portion 21a of the locking claw 21 has a wedge shape. A plurality of such locking claws 21 are arranged on the side wall of the back cover 2 so as to correspond to the positions of the notches 11.

  The facing 3 is made of, for example, black resin and has a horizontally long shape similar to the main body case 1. The lookback 3 is attached to the side of the main body case 1 where the dial 4 is mounted, and covers other than the display portion of the measured value such as the speed of the dial 4 and the engine rotation. The facing 3 has substantially the same outer shape as the main body case 1 when viewed from the front side. A tongue piece 31 and a locking claw 32 are provided on the side wall of the facing 3 so as to extend toward the main body case 1 side. The tongue piece 31 is shaped so as to cover the cutout portion 11 while a part of the tongue piece 31 is in contact with the side wall of the main body case 1 in a state where the facing 3 is attached to the main body case 1. That is, the tongue piece 31 is wider than the side wall opening of the main body case 1 in the notch 11. The locking claw 32 has a shape that can be engaged with the claw receiving portion 12 of the main body case 1. A plurality of such tongue pieces 31 and locking claws 32 are arranged on the side wall of the turn-back 3 so as to correspond to the positions of the notch portion 11 and the claw receiving portion 12 of the main body case 1, respectively.

  In such a configuration, first, the locking claw 21 of the back cover 2 advances in the direction indicated by the dotted line arrow in FIG. 1 to advance a part of the notch 11 of the main body case 1 (inward from the side wall by a predetermined distance). Engage with the inner side edge of the flat part described later, which is a part of the surface. Thereby, the back cover 2 and the main body case 1 are integrated without the locking claw 21 being exposed from the side wall of the main body case 1.

  Next, the locking claw 32 of the turning 3 advances in the direction indicated by the solid line arrow in FIG. 1 and is engaged with the claw receiving portion 12 of the main body case 1. At the same time, the tongue piece 31 of the turning 3 also advances in the direction indicated by the solid line arrow in FIG. 1 and covers the cutout portion 11 of the main body case 1. In addition, the front surface side of the notch 11 is inevitably covered and covered when the facing 3 is integrated. As a result, the facing 3 and the main body case 1 are integrated without the notch 11 being exposed from the side wall of the main body case 1.

  In this way, the back cover 2 and the lookback 3 are integrated with the main body case 1.

  Subsequently, with reference to FIGS. 2 to 3, the details of the cutout portion 11, the locking claw 21, and the tongue piece 31, and the operation when the main body case 1, the back cover 2, and the turn-back 3 are integrated will be described. . FIG. 2 is an exploded perspective view in which the vicinity of the cutout portion of the main body case, the locking claw of the back cover, and the facing tongue piece in FIG. 1 are enlarged. FIG. 3 is a perspective view showing a state in which the main body case, the back cover, and the turn-back are integrated in the same part as FIG. 4 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 2, a notch portion 11 is provided at a part of the peripheral portion that is a boundary between the side wall 1 a and the front surface 1 b of the main body case 1 so as to straddle the peripheral portion. The notch 11 has a space shape close to a rectangular parallelepiped or a cube. On the inner surface of the cutout portion 11, a planar portion 11 a as a convex portion is provided so as to extend inward from the side wall 1 a of the main body case 1 by a predetermined distance W1. The flat surface portion 11a is perpendicular to the extending direction of the locking claw 21 as the locking portion. It becomes easy to confirm the locked state of the flat surface portion 11a and the locking claw 21 through the notch portion 11 as described above.

  Further, the flat surface portion 11a has a rectangular or square planar shape of length W1 × width W2. The flat portion 11a is perpendicular to the direction in which the back cover 2 is attached as indicated by the dotted arrow in FIG. A portion that advances inward from the side wall 1a of the main body case 1 by a predetermined distance W1 along the flat surface portion 11a has a straight edge shape (inner edge portion 11a1). The region further advanced inward by the length W4 from the inner edge portion 11a1 is a rectangular or square through hole having a width W2 × a length W4 (see also FIG. 4). Except for the portion corresponding to the notch 11, a flange portion 15 having the same outer shape as the look-back 3 is formed along the peripheral portion, and the side wall 1 a of the main body case 1 is more than the look-back 3. The outer diameter is slightly smaller.

  As shown in FIG. 2, a locking claw 21 that engages with the inner edge portion 11 a 1 of the flat surface portion 11 a of the main body case 1 is provided on the side wall of the back cover 2. A part of the side wall of the back cover 2 is slightly recessed in the inner direction, and a locking claw 21 is provided so as to extend from the recessed portion toward the main body case 1 side. The locking claw 21 has a width W6 and has a wedge-shaped tip portion 21a. When the back cover 2 and the main body case 1 are in contact with each other so that the side wall of the back cover 2 and the side wall 1a of the main body case 1 are flush, The height is such that it engages with the inner edge 11a1 of the flat portion 11a. The locking claw 21 has elasticity in the inner and outer directions. The maximum thickness of the tip 21a of the locking claw 21 is W5, which is smaller than the length W4 (see also FIG. 4). Further, the maximum width W6 of the distal end portion 21a is narrower than the width W2. That is, the distal end portion 21a of the locking claw 21 has a size that can pass through the hollow portion of the notch 11 having a width W2 × a length W4.

  Further, as shown in FIG. 2, a tongue piece 31 is provided on the side wall of the facing 3 so as to extend toward the main body case 1 side. The tongue 31 has a width W7 × a length W8, which is a size that can completely cover the side wall opening of the width W2 × the height W3 in a state where the turn 3 is attached to the main body case 1. . The tongue piece 31 is configured such that a part of the tongue piece 31 comes into contact with the side wall 1 a of the main body case 1 when the facing 3 is attached to the main body case 1. Thereby, when the turning 3 is attached to the main body case 1, the side wall opening is completely closed by the tongue piece 31, and dust can be prevented from entering.

  In such a configuration, when the back cover 2 is attached to the main body case 1, as shown in FIG. 4, the front end portion 21 a of the locking claw 21 of the back cover 2 is the inner edge of the flat portion 11 a of the main body case 1. 11a1 is engaged. Then, as shown in FIG. 3, the side wall of the back cover 2 and the side wall 1a of the main body case 1 are flush with each other. Further, when the facing 3 is attached to the main body case 1, the tongue piece 31 of the facing 3 completely covers the side wall opening of the main body case 1 as shown in FIG. 3. As a result, the main body case 1, the back cover 2 and the turnback 3 are stabilized in the state shown in FIGS.

  In the cross-sectional view of FIG. 4, the main body case 1 is fitted with a dial 4 and accommodates main electronic components such as a substrate 5, a pointer 6, a motor 7, a light source 8, and the like. The main body case 1 supports a substrate 5 on which main electronic components such as a motor 7 and a light source 8 are mounted by a locking claw 13. The motor 7 mounted on the substrate 5 rotates the pointer 6 by an amount corresponding to a predetermined measurement value, and instructs the numbers and scales formed on the dial 4. Light emitted from the light source 8 is reflected by the reflecting surface 14 formed integrally with the main body case 1 to illuminate the dial 4. Since the configuration and operation described in this paragraph are well known and are not directly related to the present invention, further detailed description is omitted.

  As described above, according to the embodiment of the present invention, the engagement portion between the main body case 1 and the back cover 2 is a position advanced inward from the respective side walls 1a (the side walls of the back cover 2 have no reference numerals). Therefore, once the main body case 1 and the back cover 2 are integrated, it is difficult to apply external pressure to the engagement site. Therefore, reliability and workability are improved. In particular, according to the embodiment of the present invention, a remarkable effect can be obtained by being used in an in-vehicle instrument.

  In the embodiment, the first housing member and the second housing member are described as corresponding to the main body case 1 and the back cover 2, respectively. However, the first housing member and the second housing member are the same. It is not limited. For example, the back cover 2 and the main body case 1 may be used as the first housing member and the second housing member, respectively. Further, the third housing member may be a front glass instead of the turnover 3. Moreover, this invention is not limited to application to a vehicle-mounted instrument, It can apply similarly to other housing | casings, such as a ship instrument.

  Further, as shown in the modification of FIG. 5, a tongue piece 31 ′ extending from the side wall of the facing 93 toward the main body case 91 is provided so as to cover the claw receiving portion 911 and the locking claw 921 of FIG. May be. By doing so, it is possible to protect the claw receiving portion 911 and the locking claw 921 from external pressure while the main body case 91 and the back cover 92 remain in the conventional configuration.

  1 to 4 described above, as shown in FIGS. 2 and 3, the tongue of the turnover 3 that abuts against the side wall 1 a at the periphery of the side wall opening of the main body case 1 and covers the side wall opening. The tongue 31 is protected from breakage due to contact with peripheral members and the like so that the piece 31 does not protrude from the side wall 1a of the body case 1 by the presence of the flange portion 15 at the peripheral edge of the body case 1. It was configured as follows.

  However, for example, as shown in FIG. 6, the main body case 1 is formed in the same size as the outer shape of the main body case 1, the flange portion 15 of the main body case 1 is omitted, and the tongue piece 31 of the main body case 1 is attached to the side wall of the main body case 1. As shown in FIG. 7, as the size corresponding to the opening, when the turn 3 is attached to the main body case 1, the tongue piece 31 is inserted just into the side wall opening of the main body case 1, as shown in FIGS. 7 and 8. Moreover, you may comprise so that the tongue piece 31 may be located on the same surface as the side wall 1a of the main body case 1. FIG.

  If comprised in this way, even if it does not provide the flange part 15 in the main body case 1, it will prevent the tongue piece 31 from protruding independently from the side wall 1a of the main body case 1, and the tongue piece 31 from the breakage by contact with a peripheral member etc. In the same manner as in the above-described embodiment, the claw receiving portion 12 of the main body case 1 and the locking claw 21 of the back case 2 are not exposed to the outside so as to protect them from external pressure and dust. Can be achieved.

It is a disassembled perspective view which shows a part of vehicle-mounted instrument which concerns on one Embodiment of this invention. It is the disassembled perspective view which expanded the vicinity of the notch part of a main body case in FIG. 1, the latching claw of a back cover, and the facing tongue piece. FIG. 3 is a perspective view showing a state in which a main body case, a back cover, and a look are integrated in the same portion as FIG. 2. It is AA sectional view taken on the line in FIG. It is a perspective view which shows the modification of this invention. It is a disassembled perspective view which shows the other modification of this invention. It is a perspective view which shows the state at the time of the assembly | attachment of FIG. It is BB sectional drawing in FIG. It is a disassembled perspective view which shows a part of this kind of vehicle-mounted instrument. FIG. 10 is an exploded perspective view in which the vicinity of the claw receiving portion of the main body case and the locking claw of the back cover in FIG. 9 is enlarged. FIG. 11 is a perspective view illustrating a state in which a main body case, a back cover, and a look are integrated in the same part as in FIG. 10. It is CC sectional view taken on the line in FIG.

Explanation of symbols

1 Body case (first housing member)
2 Back cover (second housing member)
3 Look back (third housing member)
4 Dial 11 Notch 11a Flat part (convex part)
21 Locking claw (locking part)
31 Tongue

Claims (5)

A first housing member having a side wall that is open to the outside and exposed to the outside;
A second housing member attached so as to cover all or part of the opened bottom surface of the first housing member;
A housing having
The second casing member is inserted into the first casing member from the opened bottom surface of the first casing member, and can be locked to a part of the first casing member inside the first casing member. Having a part,
A housing characterized by that. The first housing member has a convex portion extending inward from the side wall in a direction perpendicular to the side wall, and the locking portion is locked to the convex portion;
The housing according to claim 1. The side wall of the first housing member is provided with a notch, and
The convex part is integrally formed on the inner surface of the notch part,
The housing according to claim 2. The third housing member attached to the opposite side of the first housing member to the side on which the second housing member is attached;
A tongue piece portion integrally provided with the third housing member, which is shaped to cover the notch in a state where the third housing member is attached to the first housing member;
The housing according to claim 3, further comprising: The first housing member is a main body case in which main electronic components of the in-vehicle instrument are accommodated and a dial is mounted,
The second housing member is a back cover attached to the side opposite to the side on which the dial is mounted in the main body case, and
The third housing member is attached to a side of the main body case on which the dial is mounted, and is a lookback that covers other than the display portion of the measurement value of the dial.
An on-vehicle instrument having a casing according to claim 4.

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