JP6757492B2 - Display device - Google Patents

Description

The present invention relates to a display device including an information display body that displays predetermined information.

Conventionally, as a display device of this type, for example, one described in Patent Document 1 below is known. The display device described in Patent Document 1 includes a pointer-type display unit (information display body) composed of a pointer and an instrument dial, a circuit board arranged behind the pointer-type display unit, and a pointer-type display unit. A case body arranged between the circuit board and the circuit board, a pointer type display unit, and a housing for accommodating the circuit board and the case body are provided, and the housing here is a resin cover that covers the back of the circuit board. It is composed of a resin facing case for determining the visible region of the instrument dial and a transparent cover covering the resin facing case.

A cantilever-shaped L-shaped elastic piece having a hook portion at the tip is cut up and formed on the bottom wall of the resin cover, and the hook portion provides a through hole provided in the case body. It is configured to penetrate from behind and be locked (coupled) on the surface of a flat-shaped locking portion integrally formed with the case body.

JP-A-11-101205

By the way, in the case of the above-mentioned conventional display device, since there is a dimensional tolerance in the dimensions of the L-shaped elastic piece provided in the housing and the locking portion provided in the case body, the L-shaped elastic piece may be provided in some cases. It is conceivable that a minute clearance due to the dimensional tolerance is generated between the bottom surface of the hook portion provided at the tip of the elastic piece and the surface of the locking portion in the case body. Then, when the minute clearance is formed between the bottom surface of the hook portion and the surface of the locking portion having a flat shape in this way, the hook portion and the locking portion to which this is locked (coupled) are formed. There is a concern that rattling may occur in the joint portion with and the joint strength of the joint portion (that is, the joint strength between the case body and the housing) may decrease.
Therefore, in order to deal with the above-mentioned problems, an object of the present invention is to provide a display device capable of improving the bonding strength between the case body and the housing when the case body is connected to the housing. Is.

The present invention accommodates an information display body, a case body arranged on the side opposite to the viewer side of the information display body, the information display body and the case body, and when viewed from the viewer side. a housing having at least a part of unit groups provided so as to overlap with the case body, the front SL base, and an elastic piece having a hook portion is extended toward the front Symbol casing side, wherein The case body is provided with a non-flat elastic locking portion for locking the hook portion, and the housing has an upper housing that covers the viewer side of the information display body and the base portion. The upper housing is provided with a lower housing, and the upper housing is provided with a protruding portion that abuts on the hook portion .

Further, in the present invention, the case body has a support portion for supporting the information display body, and the elastic locking portion includes a first flat portion integrally formed with the support portion and at least a part thereof. It is characterized by having a second flat portion provided so as to face the hook portion, and a curved surface portion connecting the first flat portion and the second flat portion.

Further, the present invention is characterized in that the protruding portion is provided with a non-flat portion in a part thereof so that tension acts on the side surface portion of the hook portion.

According to the present invention, it is possible to provide a display device capable of achieving the initial object and improving the bonding strength between the case body and the housing when the case body is bonded to the housing.

The front view of the display device according to 1st Embodiment of this invention. A cross-sectional view taken along the line AA of FIG. 1 (hatching is omitted). BB sectional view of FIG. 1 (hatching is omitted). In FIG. 3, an enlarged cross-sectional view of a main part (hatching is omitted) mainly showing a hook part and an elastic locking part. In FIG. 3, an enlarged front view of a main part of the case body when viewed from the direction of arrow C. An enlarged cross-sectional view of a main part (hatching is omitted) showing mainly a hook part and an elastic locking part according to a modified example of the same embodiment. A cross-sectional view of a main part of the display device according to the second embodiment of the present invention (hatching is omitted). FIG. 5 is a cross-sectional view of a main part of a display device according to a modified example of the second embodiment (hatching is omitted). FIG. 5 is a cross-sectional view of a main part of a display device according to another modification of the second embodiment (hatching is omitted). A cross-sectional view of a main part of a display device according to a third embodiment of the present invention (hatching is omitted). FIG. 6 is a cross-sectional view of a main part of a display device showing an engagement state between a locking portion and a hook portion according to an application example of the present invention (hatching is omitted).

(First Embodiment) Hereinafter, an embodiment in which the first embodiment of the present invention is applied to a vehicle instrument mounted on a vehicle such as a motorcycle or an automobile will be described with reference to FIGS. 1 to 5. To do.

In FIGS. 1 and 2, the vehicle instrument as a display device in the present embodiment has an information display body 10 for displaying various vehicle information and a side opposite to the viewer E side of the information display body 10 (that is, information display). It covers the circuit board 20 arranged on the back side of the body 10), the resin case body 30 arranged between the information display body 10 and the circuit board 20, and the viewer E side of the information display body 10. A resin housing 60 including an upper housing 40 provided in the above and a lower housing 50 mainly provided so as to cover the back side of the circuit board 20 is provided.

The information display body 10 includes, for example, a pointer 11 as a linearly extending instrument pointer and an index plate 12 as an instrument dial having an index unit (not shown) such as a scale indicated by the guideline 11. A pointer-type display unit can be applied.

The pointer 11 is attached to the tip of the drive shaft 21a of the pointer driving means 21 mounted on the circuit board 20, and rotates on the index plate 12 according to the measured amount. The viewer E who visually recognizes the vehicle instrument can grasp the measured value (for example, various vehicle information such as vehicle speed information) by comparing and reading the pointer 11 and the index unit.

The circuit board 20 is made of a hard wiring board having a predetermined wiring pattern, a pointer driving means 21 made of a stepping motor or the like, a light source 22 made of an LED for supplying illumination light to the index board 12, and a resistor. , Various circuit components (not shown) such as capacitors are conductively connected to the wiring pattern.

The case body 30 is formed of a synthetic resin material such as polypropylene, and has a function as a holding body for holding the index plate 12, a function as a housing for accommodating the light source 22, and an illumination light emitted from the light source 22 on the front side (index). It has a function as a reflector that reflects light on the plate 12 side), and in this case, it is arranged on the side opposite to the viewer E side of the information display body 10.

The case body 30 has a tubular portion 31 surrounding the drive shaft 21a of the pointer driving means 21, and a first reflection extending toward the index plate 12 so as to surround the tubular portion 31 and facing the light source 22. A second reflecting portion 33 composed of a portion 32, a dish-shaped annular wall facing the index plate 12 and approaching the index plate 12 toward the outside, and a peripheral wall portion 34 surrounding the outer periphery of the second reflecting portion 33. have.

In this case, the first reflecting portion 32 constitutes a reflecting surface that reflects the illumination light from the light source 22 mainly toward the outer periphery, and the second reflecting portion 33 reflects to the outer periphery through the first reflecting portion 32. It constitutes a reflective surface that reflects the illuminated illumination light toward the index plate 12. Further, the peripheral wall portion 34 is composed of a vertical wall-shaped wall portion provided so as to be located between the index plate 12 and the circuit board 20.

Reference numeral 35 denotes a recessed portion provided at an appropriate portion of the peripheral wall portion 34 (specifically, four locations indicated by the D portion in FIG. 1), and 36 is abbreviated as the front surface portion thereof as the front surface of the peripheral wall portion 34. It is a support portion provided so as to have the same surface, and this support portion 36 is provided so as to surround the recessed portion 35, and holds (supports) the index plate 12 (information display body 10) together with the peripheral wall portion 34. (See FIGS. 3 and 5).

Further, the recessed portion 35 is composed of a recessed groove portion provided in the lower housing 50 for receiving a hook portion to be described later, and is a pair of first inner wall surfaces 35a located facing each other and the first of these. It has a second inner wall surface 35b formed of a flat vertical wall surface provided so as to connect the inner wall surfaces 35a of the circuit board, and cantilevered at the lower end of the second inner wall surface 35b located on the circuit board 20 side. An elastic locking portion 37 having a beam shape is formed along the plate surface of the circuit board 20.

The elastic locking portion 37 is formed in a non-flat shape in which a part thereof has a curved shape (curved shape), and is formed on the second inner wall surface 35b so as to substantially (approximately) close the lower end side opening of the recessed portion 35. It is formed (extended) so as to project outward from the lower end portion (the side wall portion side of the lower housing 50, which will be described later).

Further, in this case, the elastic locking portion 37 includes a first flat portion 37a projecting outward (the side wall portion side of the lower housing 50) from the lower end portion of the second inner wall surface 35b. A second flat portion 37b provided so that at least a part thereof faces (contacts) the hook portion of the lower housing 50, and connects the first flat portion 37a and the second flat portion 37b. It has a curved surface portion 37c provided (see FIG. 4).

In this case, the second flat portion 37b and the first flat portion 37a integrally formed on the support portion 36 are located on the same surface, and the curved surface portion 37c has a predetermined curvature so that the circuit board 20 has a predetermined curvature. It consists of a curved surface (concave surface) that is curved toward the side.

The thickness of the curved surface portion 37c is formed to be thinner than the thickness of the first flat portion 37a or the second flat portion 37b, or is the thickness of the first flat portion 37a or the second flat portion 37b. It may be substantially the same, but considering that the elastic locking portion 37 itself has springiness (elasticity), it is formed thinner than the thickness of the first flat portion 37a and the second flat portion 37b. It is desirable, and with such a configuration, a spring shape of the elastic locking portion 37 using a synthetic resin material can be easily obtained.

The upper housing 40 includes a see-through portion 41 formed of a translucent synthetic resin material and an invisible portion 42 formed of a light-shielding (for example, black) synthetic resin material, and is visually recognizable when looking straight at a vehicle instrument. Person E can see through (visually recognize) the indicator portion of the pointer 11 and the index plate 12 through the fluoroscopic portion 41. Further, the invisible portion 42 is integrally formed with the fluoroscopic portion 41 so as to mainly cover the peripheral portion of the index plate 12.

The lower housing 50 is formed of a synthetic resin material such as polypropylene, and surrounds a base portion 51 provided so as to cover the back of the circuit board 20 and a peripheral wall portion 34 of the case body 30, and the upper housing 40 is invisible. The side wall portion 52 provided so as to form a pair with the portion 42 is integrally formed. In this case, at least a part of the base portion 51 overlaps with the case body 30 when viewed from the viewer E side. It is provided as follows. In the cross-sectional view of FIG. 2, the side wall portion 52 is shown only on the right side of the circuit board 20, but the side wall portion 52 is also provided on the left side in the cross-sectional view of FIG. Needless to say.

Further, reference numeral 53 denotes an elastic piece having elasticity integrally formed at the base portion 51 corresponding to the forming position of the elastic locking portion 37, and the number of the elastic piece 53 is 4 which is the same as the number of formed elastic locking portions 37. The two are provided, and each vertically protrudes (extends) from the base 51 toward the information display body 10. A hook portion 54 composed of a claw portion hooked on the second flat portion 37b of the elastic locking portion 37 is formed at the tip of the elastic piece 53.

As described above, in the case of this example, the elastic piece 53 having the hook portion 54 extends toward the case body 30 side (information display body 10 side) at the base portion 51 of the lower housing 50, while the elastic piece 53 has the hook portion 54. The case body 30 is provided with a non-flat elastic locking portion 37 having elasticity for locking (hooking) the hook portion 54.

Then, as shown in FIG. 4, when the hook portion 54 is locked (hooked and fixed) to the elastic locking portion 37 (second flat portion 37b), it is curved toward the circuit board 20 side. Since the curved surface portion 37c is partially provided on the elastic locking portion 37, the flexible (elastic) cantilever-shaped elastic locking portion 37 has a second flat portion 37b located on the free end side thereof. Is elastically deformable to the upper side (that is, the index plate 12 side) in FIG. 3, and by utilizing this elastic deformation, the surface P1 of the second flat portion 37b constantly applies tension to the bottom surface P2 of the hook portion 54. The hook portion 54 is firmly hook-coupled to the elastic locking portion 37 so as to act (give).

Therefore, there is no minute clearance between the bottom surface of the hook portion and the surface of the locking portion due to the dimensional tolerance of the hook portion and the locking portion to which the hook portion is locked as in the conventional case, and the elastic locking portion is not generated at all. Since the 37 has a function as a tension applying portion for applying a force (tension) for pushing the hook portion 54 upward (that is, the index plate 12 side) in FIG. 3, the case body 30 is lowered. When connecting to the side housing 50 (housing 60), improving the bonding strength between the hook portion 54 and the elastic locking portion 37 to which the hook portion 54 is locked (that is, the bonding strength between the housing 60 and the case body 30). Is possible.

The housing 60 composed of the upper housing 40 and the lower housing 50 in this example constitutes the outer case of the vehicle instrument, and the information display body 10 and the circuit board 20 are inside the housing 60. The case body 30 and the case body 30 are housed. Further, the upper housing 40 and the lower housing 50 are fixed by an appropriate fixing means such as hook fixing.

As described above, in the present embodiment, the information display body 10, the case body 30 arranged on the side opposite to the viewer E side of the information display body 10, and the information display body 10 and the case body 30 are accommodated. A lower housing 50 (housing 60) having a base 51 provided so that at least a part thereof overlaps with the case body 30 when viewed from the viewer E side is provided, and a hook portion 54 is provided on the base 51. The elastic piece 53 to be held is extended toward the case body 30, and the case body 30 is provided with a non-flat elastic locking portion 37 for locking the hook portion 54. .. Further, the case body 30 has a support portion 36 that supports the index plate 12 (information display body 10), and the elastic locking portion 37 has at least a first flat portion 37a integrally formed with the support portion 36. It has a second flat portion 37b that is partially provided so as to face the hook portion 54, and a curved surface portion 37c that connects the first flat portion 37a and the second flat portion 37b.

Therefore, the elastic locking portion 37 can be elastically deformed upward (that is, the index plate 12 side) in FIG. 3, and the surface P1 of the second flat portion 37b is the hook portion 54 by utilizing this elastic deformation. Since the bottom surface P2 is configured to constantly apply (apply) tension to the bottom surface P2, the hook portion 54 and the elastic locking portion to which the hook portion 54 is locked when the case body 30 is connected to the lower housing 50 (housing 60). It is possible to improve the bond strength with 37 (that is, the bond strength between the housing 60 and the case body 30) .

Further, in the present embodiment, the first flat portion 37a, the second flat portion 37b, and the single curved surface portion 37c provided between the first flat portion 37a and the second flat portion 37b are elastic. An example in which the locking portion 37 is configured has been described. For example, as a modification of the present embodiment, as shown in FIG. 6, a non-flat elastic locking portion 37 is provided with a first flat portion 37a and a second flat portion 37a. The flat portion 37b of the above and a plurality of (for example, two) curved surface portions 37c provided between the first flat portion 37a and the second flat portion 37b may be formed, and in the case of such a configuration. However, the same action and effect as those of the above-described embodiment can be obtained.

(Second Embodiment) Next, the second embodiment of the present invention will be described with reference to FIG. 7, but the detailed description thereof will be described by using the same reference numerals at the same or equivalent points as those of the first embodiment described above. Omit. In the second embodiment, the housing 60 includes an upper housing 40 that covers the viewer E side of the information display body 10 and a lower housing 50 having a base 51 that covers the back of the circuit board 20. The housing 40 is provided with a cantilever-shaped projecting portion 43 that abuts against the hook portion 54 from above.

In this case, the protruding portion 43 functions as a rib for preventing the hook from coming off, which is formed so as to hang straight from the invisible portion 42 (upper housing 40) corresponding to the formation position of the hook portion 54, and the tip side thereof. A step portion 43a is formed on the (free end side).

Then, as shown in FIG. 7, the protruding portion 43 provided on the upper housing 40 abuts on the hook portion 54 (specifically, the stepped portion 43a of the protruding portion 43 is the upper surface portion L1 of the hook portion 54 and the hook portion. (By abutting against the side surface portion L2 of 54), the step portion 43a is configured to constantly apply (apply) tension to the upper surface portion L1 and the side surface portion L2 of the hook portion 54, and the hook portion 54 is disengaged from the elastic locking portion 37. Since it becomes difficult, the bonding strength between the lower housing 50 (housing 60) and the case body 30 can be further improved.

Further, in the second embodiment, an example in which the stepped portion 43a of the protruding portion 43 abuts on the upper surface portion L1 and the side surface portion L2 of the hook portion 54 has been described, but the shape of the protruding portion 43 is the hook portion. Any shape can be adopted as long as the 54 does not easily come off from the elastic locking portion 37. For example, as shown in FIG. 8 as a modification of the second embodiment, the tip side of the protruding portion 43 (the free). The recessed surface (recessed portion) 43c of the recess 43b provided on the end side) may be configured to abut the upper surface portion L1 of the hook portion 54.

Even in such a configuration, the recessed surface 43c is configured to constantly apply tension to the upper surface portion L1 of the hook portion 54, and the bonding strength between the lower housing 50 (housing 60) and the case body 30 is strong. Can be further improved.

FIG. 9 shows another modification of the second embodiment. In another modification, the projecting portion 43 has a projecting base portion 43d that abuts against the upper surface portion L1 of the hook portion 54, and a branching portion 43e provided so as to branch between the projecting base portion 43d and the invisible portion 42. A slit 43f is provided between the branch portions 43e so that the protruding portion 43 has elasticity.

Even in such a configuration, the protruding base portion 43d provided on the elastic protruding portion 43 always exerts tension on the upper surface portion L1 of the hook portion 54, and the lower housing 50 (housing 60) is configured. ) And the case body 30 can be further improved.

(Third Embodiment) Next, the third embodiment of the present invention will be described with reference to FIG. 10, but the detailed description thereof will be described by using the same reference numerals at the same or equivalent points as those of the first embodiment described above. Omit. In this third embodiment, instead of the stepped portion 43a adopted in the second embodiment (particularly see FIG. 7), a curved surface portion (non-flat portion) having a curved surface shape (curved shape) as a part of the protruding portion 43. ) 43g is provided.

That is, in the third embodiment, the protruding portion 43 is formed in an elastic cantilever shape in order to apply a force (tension) to the side surface portion L2 of the hook portion 54, and corresponds to the formation position of the hook portion 54. A flat first hanging portion 43h formed to hang straight from the invisible portion 42 (upper housing 40) and at least a part thereof are provided so as to face (contact) the side surface portion L2 of the hook portion 54. It has a flat-shaped second hanging portion 43j, and the above-mentioned curved surface portion 43g provided so as to connect the first hanging portion 43h and the second hanging portion 43j.

In this case, the first hanging portion 43h and the second hanging portion 43j are located on the same vertical plane, and the curved surface portion 43g is close to the tip end side (the free end portion side) of the protrusion 43. It is composed of a curved surface (concave surface) provided at a position and curved toward the side wall portion 52 side so as to have a predetermined curvature. The protruding portion 43 composed of the hanging portions 43h and 43j and the curved surface portion 43g in this way pushes the hook portion 54 to the left side (that is, the case body 30 side) in FIG. 10 (tension). ) Is given a function as a tension giving part.

The thickness of the curved surface portion 43g is formed to be thinner than the thickness of the first hanging portion 43h or the second hanging portion 43j, or is the thickness of the first hanging portion 43h or the second hanging portion 43j. It may be substantially the same, but considering that the protruding portion 43 itself has springiness (elasticity), it may be formed thinner than the thickness of the first hanging portion 43h and the second hanging portion 43j. Desirably, with such a configuration, the spring shape of the protruding portion 43 using the synthetic resin material can be easily obtained.

According to the third embodiment, the protruding portion 43 is provided with a curved surface portion 43g in a part thereof so that tension acts on the side surface portion L2 of the hook portion 54. Therefore, as shown in FIG. 10, when the second hanging portion 43j is in contact with the side surface portion L2 of the hook portion 54, the elastic cantilever-shaped protruding portion 43 is on the free end side thereof. The second hanging portion 43j located at the position can be elastically deformed to the left side (that is, the case body 30 side) in FIG. 10, and the inner surface L3 of the second hanging portion 43j is hooked by utilizing this elastic deformation. Tension is constantly applied to the side surface portion L2 of the portion 54, and the bonding strength between the lower housing 50 (housing 60) and the case body 30 can be further improved.

The present invention is not limited to the above-described embodiments and drawings. It is possible to make changes (including deletion of components) to the embodiments and drawings as appropriate without changing the gist of the present invention.

For example, in each of the above-described embodiments, four elastic locking portions 37 composed of the flat portions 37a and 37b and the curved surface portion 37c are provided on the outer peripheral portion of the case body 30, and these four elastic locking portions 37 are provided. Each of the (four) hook portions 54 was locked (hooked and fixed), but is formed on the outer peripheral portion of the case body 30 as shown in FIG. 11 as an application example of the present invention. Of the elastic locking portions 37 at the locations, one (or two) locations may be a flat locking portion 38 having no curved surface portion 37c. That is, at this time, the hook portion 54 is locked to the elastic locking portion 37 and the locking portion 38.

Further, in each of the above-described embodiments, an example in which the information display body 10 is composed of the pointer 11 and the index plate 12 has been described. For example, as the information display body 10, the measured values (the various vehicle information) are used. It is also possible to apply an instrument display composed of a liquid crystal display panel capable of displaying an image or the like.

10 Information display body 20 Circuit board 30 Case body 34 Peripheral wall part 35 Recessed part 35a First inner wall surface 35b Second inner wall surface 36 Support part 37 Elastic locking part 37a First flat part 37b Second flat part 37c Curved surface Part 38 Locking part 40 Upper housing 43 Protruding part 43a Step part 43c Recessed surface (recessed part)
43d protruding base 43e branch 43g curved surface (flat part)
50 Lower housing 51 Base 53 Elastic piece 54 Hook 60 Housing L1 Upper surface of hook L2 Side of hook P1 Surface of second flat part P2 Bottom of hook E Visualizer

Claims (3)

Information display and
A case body arranged on the side opposite to the viewer side of the information display body,
A housing having at least a portion is provided so as to overlap with the casing body base portion when viewed from the viewer side accommodates the said case body and said information display,
The front SL base, and an elastic piece having a hook portion is extended toward the front SL case body side,
The case body is provided with a non-flat elastic locking portion for locking the hook portion .
The housing includes an upper housing that covers the viewer side of the information display body and a lower housing that has the base portion.
A display device characterized in that the upper housing is provided with a protruding portion that abuts on the hook portion . The case body has a support portion that supports the information display body, and has a support portion.
The elastic locking portion includes a first flat portion integrally formed with the support portion, a second flat portion provided so that at least a part thereof faces the hook portion, and the first flat portion. The display device according to claim 1, further comprising a curved surface portion connecting the second flat portion. Wherein the protruding portion, as the tension in the side portion of the hook portion is applied, the display apparatus according to claim 1, wherein the non-flat portion is provided in a part thereof.

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