JP5204624B2 - Decorative material - Google Patents

Description

  The present invention relates to a decorative member, and more particularly, to an improvement of a decorative ring member used for an instrument dial of a vehicle.

  Conventionally, for dials used in vehicles such as speedometers, tachometers, etc., the dial rotation area of the dial for instruments is used as a decorative member having a metallic luster for decoration of the dial for instruments. The thing of the structure surrounded by the ring member for decoration of this is known.

  Conventionally, this type of instrument dial has adopted a configuration in which an engagement hole is formed in the dial body so as to surround the pointer rotation region, and a decorative ring member is attached to the engagement hole. .

  The decorative ring member has a mountain shape having a parabolic contour, and a locking claw that is locked to the engagement hole is formed at the bottom thereof.

  The decorative ring member includes, for example, a ring-shaped inner resin member using a non-plating resin material that is black and to which plating does not adhere, and a ring-shaped outer resin member using a plating resin material to which plating adheres It is configured.

  This decorative ring member is formed by a so-called two-color molding method in which a ring-shaped inner resin member is formed and then a plating resin material is injection-molded onto the ring-shaped inner resin member.

  This decorative ring member is then immersed in a plating bath, and a plating film is formed on the surface of the ring-shaped outer resin member, whereby a decorative ring shape having a metallic luster on the surface of the ring-shaped outer resin member. A band is formed.

According to this prior art, after the plating film is formed on the entire surface of the decorative ring member, the outer peripheral surface portion of the decorative ring member is masked in order to apply black coating to the inner peripheral surface portion of the decorative ring member. Compared with the method, there is an advantage that it can be manufactured at a low cost (for example, see Patent Document 1).
JP 2007-147296 A

  However, in this conventional decorative ring member, a ring-shaped inner resin member is injection molded using a non-plating resin material, and then a ring-shaped outer resin member is formed by injection molding using a plating resin material. Thereafter, the decorative ring member is immersed in a plating bath to form a decorative ring-shaped strip having a metallic luster on the surface of the ring-shaped outer resin member. It is generally complicated, and there is a limit to the fact that it can be manufactured at a lower cost compared to the conventional manufacturing method using black paint.

  Now that price competition is intensifying and corporate efforts are further demanded, there is a demand for a decorative member that can be manufactured at a lower cost without degrading the quality as much as possible, and thus an instrument dial.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a decorative member capable of greatly reducing the manufacturing cost without reducing the quality as much as possible.

The decorative member according to claim 1 has a belt-shaped inner peripheral wall portion disposed around the pointer rotation region, and a belt-shaped outer peripheral wall portion disposed to face the belt-shaped inner peripheral wall portion, and the belt-shaped inner peripheral wall. The belt-like hollow part is formed by connecting one end of each of the belt-like outer peripheral wall part and the belt-like outer peripheral wall part to form a belt-like top wall part and separating the belt-like inner peripheral wall part and the belt-like outer peripheral wall part from each other toward the other end. A decorative reflection band is formed in a region including at least the belt-shaped top wall portion, and the belt-shaped inner peripheral wall portion is thicker than the belt-shaped outer peripheral wall portion. In this way, the belt-like inner peripheral wall portion, the belt-like outer peripheral wall portion, and the belt-like top wall portion are integrally formed , and the bottom of the belt-like inner peripheral wall portion is ejected to release the decorative member from the injection mold An abutting portion with which the pin abuts is formed .

  The decorative member according to claim 2 is characterized in that the decorative reflective band is formed on the band-shaped top wall portion by bonding.

  The decorative member according to claim 3 is characterized in that the decorative reflective band is formed by hot stamping.

The decorative member according to claim 1 is a belt-shaped inner peripheral wall portion disposed around the pointer rotation region, a belt-shaped outer peripheral wall portion disposed opposite to the belt-shaped inner peripheral wall portion, the belt-shaped inner peripheral wall portion, and A belt-shaped decorative member having a belt-shaped top wall that connects one end of the belt-shaped outer circumferential wall and a belt-shaped hollow that separates the belt-shaped inner circumferential wall and the belt-shaped outer circumferential wall from one end to the other. Since we decided to form a reflective band for decoration on the top wall part, it is possible to mold the belt-like inner peripheral wall part, the belt-like outer wall part and the belt-like top wall part at a time, compared with the conventional so-called two-color molding method, There is an effect that the decorative member can be manufactured at low cost.
In addition, since the abutting portion where the eject pin for releasing the decorative member from the injection molding die abuts is provided at the bottom of the belt-like inner peripheral wall portion, which is higher in rigidity than the belt-like outer peripheral wall portion, the injection molding die for the decorative member There is an effect that it is possible to prevent the decorative member from being deformed when released from the mold.

  Further, since the volume of the decorative member is reduced by forming a belt-like hollow portion between the belt-like inner peripheral wall portion and the belt-like outer peripheral wall portion, the decorative member has a low temperature environment condition and a high temperature environment condition. Even when a temperature cycle test is conducted, the distortion deformation due to volume expansion can be relaxed, and therefore, the decorative reflective band formed on the belt-like top wall portion by adhesion less weak than the plating. There is an effect that the occurrence of cracks can be avoided as much as possible.

  In addition, since the thickness of the belt-shaped inner peripheral wall portion is made thicker than the thickness of the belt-shaped outer peripheral wall portion, the rigidity of the belt-shaped inner peripheral wall portion can be set higher than that of the belt-shaped outer peripheral wall portion, and the effect that deformation becomes difficult. Play.

  In particular, according to the decorative member described in claim 3, since the decorative reflective band is formed by hot stamping, there is an effect that it can be manufactured at low cost.

  In addition, various colors of hot stamping are available on the market, so the color of the decorative reflective band can be adjusted according to the background color of the mounting location, user preferences, etc. There is an effect that it can be freely selected.

  Hereinafter, an embodiment in which an instrument dial having a decorative ring member as a decorative member according to the present invention is applied to a vehicle instrument will be described with reference to the drawings.

  FIG. 1 is a partially exploded perspective view of a combination meter as a vehicle meter according to the present invention.

  In FIG. 1, reference numeral 1 denotes a combination meter. The combination meter 1 has a dial main body 2 for an instrument. The dial body 2 includes a large-diameter pointer rotation area 3 for a speedometer, a small-diameter pointer rotation area 4 for a fuel meter, a large-diameter pointer rotation area 5 for a tachometer, and a small-diameter pointer rotation for a water temperature meter. It has area 6.

  Each of the pointer turning regions 3 to 6 is provided with a scale 7 in an arc shape and a character 8 is appropriately provided along the scale 7. As shown in FIG. 2, a shaft portion insertion hole 9 is formed at the center of each of the pointer rotation regions 3 to 6, and a rotation shaft (not shown) is inserted into the shaft portion insertion hole 9, and this rotation is performed. As shown in FIG. 1, a pointer 10 having an appropriate shape is provided on the moving shaft.

  As shown in FIG. 2, the large-diameter pointer rotation areas 3 and 5 and the small-diameter pointer rotation areas 4 and 6 have at least a radially outward portion with an arc-shaped scale 7 facing outward. The inclined wall 12 is inclined so as to rise obliquely from the flat portion 11.

  As shown in FIG. 1, the dial body 2 is formed with engagement holes 3 ′ at appropriate intervals so as to surround the large-diameter pointer rotation regions 3, 5. An engagement hole 4 ′ is formed so as to surround the pointer rotation areas 4 and 6.

  The dial main body 2 is mounted with decorative ring members 13 and 14 as decorative members. Since the decorative ring member 13 and the decorative ring member 14 have the same shape, only one decorative ring member 14 will be described below.

  The decorative ring member 14 has a decorative large-diameter ring portion 14a corresponding to the large-diameter pointer rotation region 3 and a decorative ring member corresponding to the small-diameter pointer rotation region 4 as shown in an enlarged view in FIGS. It is comprised from the small diameter ring part 14b. The small-diameter ring portion 14b for decoration has an arc shape connected to the large-diameter ring portion 14a for decoration.

  The large-diameter ring portion for decoration 14a and the small-diameter ring portion for decoration 14b have an engaging claw 15 engaged with the engaging hole 3 ′ and an engaging claw 16 engaged with the engaging hole 4 ′. . The engaging claws 15 and 16 are formed at the bottoms of the decorative large-diameter ring portion 14a and the decorative small-diameter ring portion 14b.

  The ornamental large-diameter ring portion 14a and the ornamental small-diameter ring portion 14b are, as shown in section in FIG. 5, a ring-shaped inner peripheral wall as a belt-shaped inner peripheral wall portion disposed around the pointer turning regions 3 and 4 And a ring-shaped outer peripheral wall portion 19 as a band-shaped outer peripheral wall portion disposed to face the ring-shaped inner peripheral wall portion 17. The ring-shaped inner peripheral wall portion 17 and the ring-shaped outer peripheral wall portion 19 are separated from each other, and a ring-shaped hollow portion 18 as a band-shaped hollow portion that opens downward on the other end side is formed with the ring-shaped inner peripheral wall portion 17. It is formed between the ring-shaped outer peripheral wall portion 19.

  One end of each of the ring-shaped inner peripheral wall portion 17 and the ring-shaped outer peripheral wall portion 19 is connected to form a ring shape that communicates with the ring-shaped outer peripheral wall portion 19 and the ring-shaped inner peripheral wall portion 17 from the top to the middle abdomen. A top wall portion 20 is formed above the ring-shaped hollow portion 18.

  This decorative ring member 14 is engaged with the ring-shaped inner peripheral wall portion 17, the ring-shaped outer peripheral wall portion 19, and the ring-shaped top wall portion 20 by using an injection mold 21 shown in FIGS. 6 to 9 using a black resin material. The claw 16 is integrally formed. 6 to 9 schematically show only the portion of the injection mold 21 that forms the large-diameter ring portion 14a.

  The injection mold 21 is generally composed of, for example, a lower mold 21A and an upper mold 21B, and the lower mold 21A can be moved up and down with respect to the upper mold 21B. The upper mold 21B is formed with a resin injection path 21C for injecting a black resin material and a ring-shaped cavity 21D. The lower mold 21A is formed with a ring-shaped protrusion 21E that forms the ring-shaped hollow portion 18 in cooperation with the ring-shaped cavity 21D and a cavity 21F for forming the engaging claws 15 and 16.

  The lower mold 21A is provided with an eject plate 23 having an eject pin 22 for releasing the decorative ring member 14 from the injection mold 21. For example, the eject plate 23 is driven by a hydraulic cylinder device 24.

  As shown in FIG. 4, the wall thickness on the bottom side of the ring-shaped inner peripheral wall portion 17 is determined so that the eject pin 22 is in contact with the bottom portion 17 a of the ring-shaped inner peripheral wall portion 17. The wall portion 19 is formed to be thicker than the bottom side wall, and the bottom portion 17a of the ring-shaped inner peripheral wall portion 17 is an abutting portion against which the eject pin 22 abuts.

  The lower mold 21A is lifted from the lower position of the lower mold 21A shown in FIG. 6 as shown in the direction of arrow A, and the lower mold 21A and the upper mold 21B are brought into contact with each other as shown in FIG. The mold is clamped, and the black resin material 21G is injected into the ring-shaped cavity 21D from the resin injection path 21C as indicated by the arrow B in this clamped state, and the black resin material 21G is cured, and the decorative ring shown in FIG. The member 14 is formed.

  Next, in a state where the lower mold 21A is lowered and opened, the eject plate 23 is driven in the direction of arrow C by the cylinder device 24 as shown in FIG. Then, the eject pin 22 comes into contact with the bottom portion 17a of the ring-shaped inner peripheral wall portion 17 of the decorative ring member 14, and the decorative ring member 14 is released from the lower mold 21A. In FIG. 4, the contact trace of the eject pin 22 is indicated by reference numeral 25.

  On the surface of the ring-shaped top wall portion 20, as shown in FIG. 3, a decoration ring-shaped reflection band 26 as a decoration reflection band having a metallic luster is formed from the top portion to the middle abdomen. The decorative ring-shaped reflection band 26 is formed by bonding, for example, hot stamping. FIG. 10 shows a cross-sectional structure of the hot stamping foil 30.

  As the hot stamping foil 30, for example, a release layer 32 is applied to the base 31, an aluminum vapor deposition film 33 is formed on the release layer 32, and an adhesive 34 is applied to the aluminum vapor deposition film 33 is used. .

  As shown in FIG. 11, the hot stamping foil 30 is brought into contact with the ring-shaped top wall portion 20 of the decorative ring member 14, and the hot stamping foil 30 is formed into a ring shape by using a rubber member 35 for hot stamping. The aluminum vapor deposition film 33 is transferred to the ring-shaped top wall portion 20 by being pressed against the top wall portion 20 and heated, whereby a decorative ring-shaped reflection band 26 is formed as shown in FIG.

  Since the aluminum vapor deposition film 33 is very thin, a temperature cycle test between a low temperature environment condition (for example, −40 degrees C.) and a high temperature environment condition (for example, 90 degrees c) with respect to the decorative ring member 14. At first glance, cracks are likely to occur in the decorative ring reflection band 26 due to expansion / contraction due to the body expansion of the decorative ring member 14. In the embodiment of the present invention, Since the ring-shaped hollow portion 18 exists between the peripheral wall portion 17 and the ring-shaped outer peripheral wall portion 19, even when this temperature cycle test is performed on the decorative ring member 14, distortion caused by body expansion Deformation can be mitigated, and therefore, the decorative ring reflective band 26 formed by adhesion having a weaker adhesion than the plating, for example, the decorative ring reflective band 26 formed by hot stamping is cracked. It is possible to avoid as much as possible the results.

  In addition, according to the embodiment of the present invention, the ring-shaped inner peripheral wall portion 17 is higher in rigidity than the ring-shaped outer peripheral wall portion 19 in the eject pin 22 for releasing the decorative ring member 14 from the injection mold 21. The bottom side of the ring-shaped inner peripheral wall portion 17 is formed to be larger than the thickness of the bottom side of the ring-shaped outer peripheral wall portion 19 in order to make contact with the bottom portion 17a of the ring-shaped portion and to secure the contact area of the eject pin 22 As a result, the decorative ring member 14 can be prevented from being deformed when the decorative ring member 14 is released from the injection mold 21.

  In the embodiment of the present invention, the present invention is applied to the decorative ring member 14 including the decorative large-diameter ring portion 14a and the decorative small-diameter ring portion 14b. The present invention can also be applied to a decorative ring member 14 made up of only the diameter ring portion 14a or only the decorative small diameter ring member 14b.

  In the embodiment of the present invention, the height of the ring-shaped top wall portion 20 of the decorative small-diameter ring portion 14b and the height of the ring-shaped top wall portion 20 of the decorative large-diameter ring portion 14a are the same. The decorative ring-shaped reflection band 26 is formed by hot stamping. However, as shown in FIG. 13, the ring-shaped top wall portion 20 of the decorative small-diameter ring portion 14b and the ring-shaped top surface of the decorative large-diameter ring portion 14a are formed. The decorative ring-shaped reflection band 26 may be formed by hot stamping on the decorative ring member 14 having a step between the top wall portion 20 and the top wall portion 20.

1 is a partially exploded perspective view showing a schematic configuration of a vehicle instrument according to the present invention. It is sectional drawing of the dial for instruments shown in FIG. It is a perspective view of the ring member for decoration shown in FIG. It is a top view which shows the state which looked at the ring member for decoration shown in FIG. 3 from the bottom face side. It is sectional drawing which follows the XX line of FIG. FIG. 4 is a sectional view showing an example of an injection mold for molding a decorative ring member shown in FIG. 3, and is an explanatory view showing a state where a lower mold and an upper mold are separated from each other. FIG. 4 is a cross-sectional view showing an example of an injection mold for molding a decorative ring member shown in FIG. 3, and is an explanatory view showing a state where a lower mold and an upper mold are in contact with each other, and injecting a black resin material It is a figure which shows the previous state. FIG. 4 is a cross-sectional view showing an example of an injection mold for molding a decorative ring member shown in FIG. 3, and is an explanatory view showing a state where a lower mold and an upper mold are in contact with each other, and injecting a black resin material It is a figure which shows the state immediately after. FIG. 4 is a cross-sectional view showing an example of an injection mold for molding a decorative ring member shown in FIG. 3, and is an explanatory view showing a state where a lower mold and an upper mold are separated from each other, and before an eject pin is actuated It is a figure which shows a state. It is a fragmentary sectional view showing an example of hot stamping foil concerning the present invention. It is explanatory drawing which shows typically an example of the hot stamping concerning this invention. It is a partial expanded sectional view of the ring member for decoration in which the ring-shaped reflective band for decoration concerning the present invention was formed. It is explanatory drawing which shows the other Example of the ring member for decoration concerning this invention.

Explanation of symbols

3, 5... Pointer turning region 13, 14... Decorative ring member (decorative member)
17 ... Ring-shaped inner peripheral wall (band-shaped inner peripheral wall)
18 ... Ring-shaped hollow part (band-shaped hollow part)
19 ... Ring-shaped outer peripheral wall (band-shaped outer peripheral wall)
20 ... Ring-shaped top wall (band-shaped top wall)
21 ... Injection mold 26 ... Ring-shaped reflective band for decoration (reflective band for decoration)

Claims (3)

A belt-shaped inner peripheral wall portion disposed around the pointer rotation region; and a belt-shaped outer peripheral wall portion disposed opposite to the belt-shaped inner peripheral wall portion, each one end of the belt-shaped inner peripheral wall portion and the belt-shaped outer peripheral wall portion A belt-shaped top wall portion is formed, and the belt-shaped inner peripheral wall portion and the belt-shaped outer peripheral wall portion are separated from each other from one end to the other end to form a belt-shaped hollow portion. ,
The belt-like inner peripheral wall portion and the belt-like outer peripheral wall are formed so that a decorative reflection band is formed at least in a region including the belt-like top wall portion, and the belt-like inner peripheral wall portion is thicker than the belt-like outer peripheral wall portion. And a belt-like top wall portion are integrally molded , and a bottom portion of the belt-like inner peripheral wall portion is formed with an abutting portion with which an eject pin for releasing the decorative member from the injection mold is brought into contact . A decorative member characterized by that.   The decorative member according to claim 1, wherein the decorative reflective band is formed on the belt-shaped top wall portion by bonding.   The decorative member according to claim 2, wherein the decorative reflective band is formed by hot stamping.

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