JPH0825208B2 - Shaped lighting structure and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improved figurative lighting structure and a manufacturing method thereof.

[Prior Art] Conventionally, as this kind of technology, there is one disclosed in Japanese Utility Model Laid-Open No. 60-87131. This technique relates to transmitted illumination of a switch knob, and performs night illumination of the switch via a transparent member integrally formed with the switch knob by lamp light inside the switch. 10 to 12 are
FIG. 10 shows a structure in which the transparent member is integrally molded with the switch knob. FIG. 10 is a perspective view of the switch knob 1, FIG. 11 is a top view of the switch knob 1 assembled to the switch body 2, and FIG. FIG. 12 is a sectional view taken along the line AA of the one shown in FIG. 11.

The switches shown in FIG. 10 to FIG. 12 above are examples of the hazard switches of automobiles.
A hazard mark is displayed by the pattern formed by the parts b to e in FIG. 12, and the parts b and d are the transmissive parts, and the light of the lamp 3 provided inside the switch body 2 is transmitted. As a result, the hazard switch can be easily visually recognized in the automobile compartment at night.
The parts a, c, and e of FIGS. 10 and 12 are made of black plastic for molding the switch knob 1, and parts b and d are molded in advance before molding the switch knob 1. It is formed by the semi-transparent plastic plate 4 convex portion made of acrylic resin or the like having a color tone such as milky white or amber. Further, 5 is a resin a for molding the switch knob 1
The bridge portion 5 is formed so as to flow to the c portion and the e portion via the portion, and this bridge portion 5 is a so-called tunnel gate.

[Problems to be Solved by the Invention] The bridging portion 5 shown in FIG. 12 is formed for pouring resin into the c portion and the e portion as described above, but the bridging portion 5 is inevitable. Since it intersects with the transparent parts b and d, shadows are generated as shown in FIG. 11, and the quality of the illumination is lost.

[Means for Solving the Problems] The present invention has been devised in view of the above-mentioned problems, and the first invention is such that a figurative member formed of a transmissive member through which irradiated light is transmitted and the light are In a lighting structure integrally formed with a non-transmissive member formed by pouring a non-transmissive filling resin, the figurative member includes a figurative portion formed of a convex portion exposed on the surface of the lighting structure, The filling structure is filled with the defective resin by bridging the back surface of the shape member, and the bridging portion is cut to cut the bridging portion. The present invention provides a figurative lighting structure characterized by being formed.

A second aspect of the present invention is a first step of forming a shape member made of a transparent member that transmits light in a certain shape by forming a defective portion which is a recess formed by forming a gate hole on the bottom surface, and the first step. Subsequently, a filling resin that does not transmit light while bridging the back surface of the shape member through the gate hole from the groove of the mold installed on the back surface side of the shape member to the defective portion is poured, A figure lighting structure comprising a second step of integrally molding a filling resin, and a third step of cutting the bridging portion formed by the groove of the mold following the second step. The present invention provides a method for manufacturing the same.

[Operation] (a) Operation of the first invention The shape member is formed into a certain shape by forming the defective portion as described above. The filling resin bridges the back surface of the shape member to fill the defective portion. The lighting structure is formed by cutting the bridge portion. When light is irradiated from the back surface of the illumination structure, the imaged portion of the imaged member made of the transmissive member is transparently illuminated without shadow.

(B) Action of the second invention The first step is a step of molding a figure member made of a transparent member, and the step is a step by injection molding of plastic, for example. Further, the second step is a step following the first step, and the step shows a step by integral molding such as two-color molding. Further, the third step is a step following the second step, and shows a step of cutting a bridging portion formed through a step of molding a non-permeable member formed by pouring a filling resin. The cutting of the entangled portion is performed by, for example, a milling machine.

[Embodiment of the First Invention] FIGS. 1 and 2 show the configuration of an embodiment of the first invention. Here, the numbers and symbols in FIGS. 1 and 2 that are the same as the numbers and symbols in FIGS. 10 to 12 have the same configuration, and the description thereof will be omitted.

FIG. 1 is a cross-sectional view of a switch knob 11 similar to the one cited in the above-mentioned prior art, and shows a state in which a semitransparent plastic plate 41 is integrally molded with the switch knob 11.

The semi-transparent plastic plate 41 has a concavo-convex portion for forming the b portion or the e portion, and preliminarily formed gate holes 42 through 44 for pouring resin for molding the switch knob 11 in the c portion and the e portion. To do. The gate holes 42 to 44 are connected to the portion a through the bridge portion 12 described later, and the switch knob 11
The resin is poured through the bridge portion 51 at the time of injection molding.

In addition, the bridging portion 12 is formed by a groove formed in the injection mold of the switch knob 11, has a protruding shape, and is cut by a milling machine or the like. Cutting marks are left on the plastic plate 41.

Then, when the switch knob 11 is assembled to the switch body 2, the light of the lamp 3 passes through the parts b and d without being blocked. Therefore, for example, a hazard mark displayed by the pattern formed by the parts b to e is displayed by high-quality transmitted illumination without shadow.

[Embodiment of the Second Invention] FIGS. 3 to 6 show a manufacturing method of an embodiment of the second invention, which will be described in order.

(A) First Step FIGS. 3 and 4 show the first step of injection-molding the semitransparent plastic plate 41 into a figure, that is, a hazard mark, by forming a defect.

The defective portion refers to a portion f to a portion h in FIG. 4 which is a sectional view taken along the line BB of FIG.

Further, the figurative portion is formed by the portions b and d shown in FIG.

Further, the semi-transparent plastic plate 41 is simultaneously formed with alignment portions 45 and 46 which are required in the second step described later.

(B) Second Step FIG. 5 shows a second step of pouring a black plastic material into the defective portion of the semitransparent plastic plate 41.

In FIG. 5, reference numeral 5 is a mold for forming the shape on the back side of the switch knob 11, which includes alignment pins 51, 52 and a gate hole 42.
There is a groove 53 through which resin is poured into the defective portion of the semitransparent plastic plate 41 through the through holes 44. The bridge portion 12 is formed by the groove 53.

Then, the semitransparent plastic plate 41 is aligned with the alignment parts 45,
The switch knob 11 is molded together with a mold (not shown) that supports 6 by aligning the positioning pins 51 and 52 of the mold 5 and forms the shape of the front side of the switch knob 11.

(C) Third Step FIG. 6 shows a third step of cutting the bridging portion 12.

In FIG. 6, 6 is a milling tool for cutting the bridging portion 12, and a tool such as an end mill is suitable, but other tools may be used. The bridging portion 12 is cut by the tip of the milling tool 6.

[Another Embodiment of the First Invention] FIGS. 7 to 9 show another embodiment of the first invention, showing an embodiment of a display plate for a fuel level alarm or the like. It is a thing.

7 is a front view of the display plate 7, FIG. 8 is a sectional view taken along the line CC of FIG. 7, and FIG. 9 is D- shown in FIG.
The sectional view taken along the line D is shown respectively.

In the drawings, 71 is a frame portion, 72 is a mark portion, 73 is a first bridging portion that bridges the frame portion 71 and the mark portion 72 integrally, 81
Is a first blank portion, 82 is a second blank portion, and 83 is the first blank portion 81.
And a second bridge portion integrally bridging the second blank portion 82. The frame portion 71 and the mark portion 72 are formed by molding a semitransparent plastic colored in red or amber.
The first blank portion 81 and the second blank portion 82 are formed by molding a semitransparent plastic colored in transparent white or the like.

Then, as the molding order, for example, first, the frame portion 71,
The mark portion 72 and the first bridging portion 73 are preformed, and then the first bridging portion 83 is used to fill the defective portion of the molding.
This is performed in the procedure of forming the blank portion 81 and the second blank portion 82.

After the molding, the first bridging portion 73 and the second bridging portion 83 are cut by a cutting step, a step of sliding in the surface direction of the display plate 7 when removing the mold that has been formed, and the like.

The present invention is not limited to the above embodiment. For example, the figure member and the filling resin may be glass or epoxy resin other than plastic.

[Advantages of the Invention] (1) In the first invention, since the filling resin bridges the back surface of the figure member to fill the defective portion, and the bridging portion is cut to form the lighting structure, The illumination structure can be formed without damaging the external shape or the like. Further, the lighting structure is
When illuminated, the entire image area is illuminated with uniform brightness and high-quality image illumination is possible.

(2) In the second invention, since the bridging portion is formed on the back surface of the lighting structure, the bridging portion can be easily scraped off without impairing the external shape of the lighting structure. In addition, the cutting traces of the bridging portion do not appear on the surface of the lighting structure, so that the appearance is good and it is not necessary to finish the surface of the lighting structure. Therefore, the second invention can reduce the manufacturing process, the manufacturing time, and the manufacturing cost. In the second invention, when the illumination structure is a switch knob, there is no cutting mark on the figure portion which is the operation surface of the switch knob, and therefore the feeling when touched by the hand is not impaired. In addition, the lighting structure formed by the manufacturing method of the second aspect of the present invention maintains the shape pattern accurately in the process of molding and has no bridging portion, so that when the lighting structure is illuminated. , The shadow of the bridging part is not reflected, and clear shape lighting is possible.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the first invention. FIG. 2 is a sectional view showing a state in which the switch knob shown in FIG. 1 is assembled to the switch body. FIG. 3 is a plan view of a semitransparent plastic showing a first step of the manufacturing method of the first embodiment of the second invention. FIG. 4 is a cross-sectional view taken along the line BB shown in FIG. FIG. 5 is a perspective view showing a second step following the first step shown in FIG. FIG. 6 is a sectional view showing a third step following the second step shown in FIG. FIG. 7 is a plan view of another embodiment of the first invention. FIG. 8 is a sectional view taken along the line CC of FIG. FIG. 9 is a sectional view taken along the line DD in FIG. FIG. 10 is a perspective view showing a conventional technique. FIG. 11 is a top view of the switch knob shown in FIG. 10 assembled to the switch body. FIG. 12 is a sectional view taken along the line AA of the arrow shown in FIG. 11 …… Switch knob, 2 …… Switch body, 3 …… Lamp, 41 …… Semi-transparent plastic plate, 42,43,44 …… Gate hole, 12,73,83 …… Bridge section, 7 …… Display Plate, 71 ...
Frame, 72 ... Mark, 81 ... First blank, 82 ... Second
Blank area

Claims (2)

[Claims] 1. A lighting structure comprising a figure member made of a transmissive member that transmits the irradiated light and a non-transmissive member formed by pouring a filling resin that does not allow the light to pass through. The shape member has a shape portion formed of a convex portion exposed on the surface of the lighting structure, and a defect portion formed of a concave portion adjacent to the shape portion, and the filling resin bridges the back surface of the shape member. Then, the illumination structure is formed by filling the defective portion and cutting the bridging portion to form the illumination structure. 2. A figure member made of a transparent member which transmits light,
With the formation of a defective part consisting of a recess with a gate hole on the bottom surface,
A first step of forming a certain shape, and, following the first step, bridging the back surface of the shape member through the groove of the mold installed on the back surface side of the shape member, through the gate hole, to the defect portion. A second step of pouring a filling resin that does not transmit light while integrally molding the shape member and the filling resin, and cutting the bridging portion formed by the groove of the mold following the second step. A method of manufacturing a figure lighting structure, which comprises three steps.