JPH07201207A - Molding method of housing of vehicle lighting device and vehicle lighting device with the housing - Google Patents

Abstract

PURPOSE:To form a vehicle lighting device with an improved appearance and quality by forming projection for a hook of a lens foot part insertion connected in the vicinity of opening part of one vertical wall in a seal groove of a housing. CONSTITUTION:At the circumferential edge of opening part of a housing 1 a seal groove 2 having a substantially U-shaped form composed of a pair of parallel vertical walls 2a, 2b and a bottom face 2c is formed. In the vicinity of opening of one vertical wall 2a, a projection 3a toward the vertical wall 2b is formed. The projection 3a is formed with a slide tool sliding in the groove along it by at least the width of the projection 3a. A foot 12 of lens 11 is inserted into the groove 2, and the projection is used as a hook and the projection 3a is engaged as a hook engaging part, then on the bottom face 2c, a seal material 14 is sealed. A vehicle lighting tool 10 is provided in this way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more particularly to a method for molding a housing when the vehicular lamp requires a particularly beautiful appearance, and a housing formed by the molding method. The present invention relates to a vehicular lamp that adopts.

[0002]

2. Description of the Related Art FIG. 6 shows the structure of a conventional vehicle lamp 90 of this type in a principal part. A housing 91 of the vehicle lamp 90 has a pair of vertical walls 92a at the periphery of an opening.
A seal groove 92 having a substantially U-shaped cross section is provided by 92b and a bottom surface 92c, a leg portion 94 provided on a lens 93 is inserted, and a heat-melting sealing material 95 is further adhered to the housing 91 so that The lens 93 is attached in an airtight state.

At this time, the positioning at the time of mounting the housing 91 and the lens 93, and the sealing material 95.
A hook 94a is provided on the leg portion 94, for example, to reinforce the adhesive force until hardening, and the outer vertical wall 92a is provided at a position corresponding to the hook 94a of the one seal groove 92.
A hole is provided by a slide mold 80 on the hook receiving portion 9
6, the hook 94a and the hook receiving portion 96 are hooked to achieve the above-mentioned purpose.

[0004]

However, when the above-described conventional vehicular lamp 90 is viewed from the lens 93 side, the hook receiving portion 96 penetrates the vertical wall 92a. The receiving portion 96 is seen through the lens 93 as a hole and is viewed as a hole, which causes a feeling of strangeness and impairs the appearance.

In order to solve this problem, it is proposed that the slide molds 81a and 81b are provided inside the housing 91 as shown in FIG. 7, and the hook receiving portion 96 is formed so as not to penetrate the vertical wall 92a. However, in this case, the inner vertical wall 9 is formed by the slide molds 81a and 81b.
As shown in FIG. 8, a clip 97 formed of, for example, a metal plate is formed so as to prevent a part of 2b from being lost and prevent the outflow into the housing 91 when the sealing material 95 is injected into the sealing groove 92. Therefore, the assembly process is complicated, and another problem is that this time, a discomfort is caused by the clip 97 formed of a member different from the housing 91.

Further, for the same purpose, as shown in FIG. 9, part of the mold for forming the seal groove 92 is cut into the cutting portions 82a, 82a.
2b is provided, and the hook receiving portion 98 is formed by the biting portions 82a and 82b, but in this case, the biting portions 82a and 82b halves the groove width of the seal groove 92. This causes a problem in the die strength such as the deformation of this part due to the pressure of resin injection during molding, another problem such as a decrease in productivity, and a part of the seal groove 92 is missing. Problems still occur, and none of the molding methods is an essential solution, and the solution to this problem has been a problem.

[0007]

As a concrete means for solving the above-mentioned conventional problems, the present invention includes a pair of vertical walls which are parallel to each other for inserting and adhering a leg portion of a lens into a peripheral edge of an opening. A vehicular lamp including a seal groove having a substantially U-shaped cross section with the bottom surface, and a hook receiving portion for hooking a hook provided at an appropriate position of the leg portion of the lens is provided in the seal groove. In the method of molding a housing, the hook receiving portion is a protrusion protruding toward the other vertical wall in the vicinity of the opening of the one vertical wall of the seal groove, and is formed in the seal groove in the groove direction. The problem is solved by providing a method for molding a housing of a vehicular lamp, which is formed by a slide mold that slides along at least the width of the protrusion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. Reference numeral 1 in FIGS. 1 and 2 is a main part of the housing according to the present invention. The housing 1 has a cross-sectional substantially U-shaped cross section composed of a pair of vertical walls 2a and 2b and a bottom surface 2c at the periphery of the opening. A seal groove 2 having a character shape is provided, and a hook receiving portion 3 for hooking on a hook 13 provided on a leg portion 12 of the lens 11, which will be described later, is provided at an appropriate position of the seal groove 2. It is the same as the conventional example.

Here, in the present invention, the hook receiving portion 3 is an outer vertical wall 2a which is one vertical wall of the seal groove 2.
Is formed as a protrusion 3a protruding toward the inner vertical wall 2b which is the other one of the vertical walls, whereby the hook receiving portion 3 has a cross-sectional shape with a narrow inlet and a wide inner portion. The hook 13 is configured to be hooked at the step.

FIG. 3 shows a molding method for forming the hook receiving portion 3, and a receiving portion mold provided with a concave portion 20a corresponding to the protrusion 3a for forming the hook receiving portion 3. 20 is formed with slide surfaces 20b and 20c that are inclined with respect to the drawing direction Z as shown in the drawing.
It is formed as a slide mold by being sandwiched from both surfaces by groove molds 21 and 22 for forming the seal groove 2.

FIG. 4 shows a state of a forming process of the hook receiving portion 3 having the above-described structure. First, the receiving portion mold 20 for forming the hook receiving portion 3 and the seal groove 2,
The groove mold 21 and the groove mold 22 are assembled in the state shown in FIG. 2 and resin is injected. After that, since the groove die 21 and the groove die 22 are retracted along the drawing direction Z, the bearing die 20 is moved in the slide direction Y along the groove direction of the seal groove 2 by the slide surfaces 20b and 20c. It will be done.

That is, since the bearing die 20 moves in the seal groove 2 along the groove direction of the seal groove 2 due to the retreat of the groove die 21 and the groove die 22, at least the protrusions. If the movement of the width of the portion 3a is greater than the width D,
Due to this movement, the protrusion 3a is released from the bearing die 20. Therefore, when the protrusion 3a and the bearing die 20 are released from each other, the hook bearing 3 is formed by retracting the bearing die 20.

FIG. 5 shows a main part of a vehicular lamp 10 which is assembled by using the housing 1 having the hook receiving portion 3 formed by the above-described molding method. Thus, the bearing die 20 is slid in the seal groove 2 along the groove direction so as to form the hook bearing 3, and thus the housing 1 is formed. Thus, the hook bearing 3 is provided with a through hole in the outer vertical wall 2a. As a result, the through hole is not viewed as a hole through the lens 11 and the appearance can be improved.

Further, since the through hole is not formed by the above-mentioned forming method, the sealing material 14 for bonding the leg portion 11 of the lens 11 can be injected into the sealing groove 2 including the hook receiving portion 3 as well. Leakage of the sealing material 14 does not occur from any portion, and the clip and the attaching process, which are required in the conventional example, are not required, and the assembling process is not complicated.

Next, the operation and effect of the present invention having the above-described forming method will be described. First, the hook receiving portion 3 is slid along the groove direction of the seal groove 2 with the receiving portion mold 20. What is to be formed is that the bearing die 20 can be released from the seal groove 2 without interfering with any portion of the seal groove 2, and holes or defects are generated in any portion of the seal groove 2. Nonetheless, the hook receiving portion 3 can be formed. Further, at this time, since the die is not divided in the groove width direction of the seal groove 2, the die strength can be sufficiently secured.

[0016]

As described above, according to the present invention, the hook receiving portion is formed as a protrusion projecting toward the other vertical wall in the vicinity of the opening portion of the vertical groove of the seal groove, and the hook groove is provided with the hook groove. By using the method of molding the housing of the vehicle lamp formed by the slide mold that slides the inside by at least the width of the protrusion along the groove direction, first, without forming a through hole in the seal groove, Further, it is possible to form the hook receiving portion without causing a part of the seal groove to be broken, so that the hook receiving portion can be seen as a hole through the lens in the assembled vehicle lamp. It is extremely effective in improving the appearance of the vehicular lamp by eliminating the problem.

Secondly, by adopting the above-mentioned molding method, it is possible to secure sufficient strength without requiring division in the bearing mold which is a slide mold, and to form the housing without impairing productivity. It also has the effect of enabling the following, and also does not cause the generation of additional parts such as clips, and it is extremely effective in improving the productivity of vehicle lighting and improving the quality by improving the appearance overall. It is a thing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an essential part of an embodiment of a housing of a vehicular lamp according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory view showing a method of molding a housing according to the present invention.

FIG. 4 is an explanatory view showing a state of a molding step of the housing molding method of the present invention.

FIG. 5 is a sectional view showing an essential part of the vehicle lamp of the present invention.

FIG. 6 is a cross-sectional view showing a conventional example.

FIG. 7 is an explanatory view showing a molding state of another conventional example.

FIG. 8 is a cross-sectional view showing a usage state of another conventional example.

FIG. 9 is an explanatory view showing a molding state of still another conventional example.

[Explanation of symbols]

 1 ... Housing 2 ... Seal groove 2a, 2b ... Vertical wall, 2c ... Bottom surface 3 ... Hook receiving portion 3a ... Projection portion 10 ... Vehicle lamp 11 ... Lens 12 ... Leg portion 13 ... Protrusion 14 …… Seal material 20 …… Bearing die, 21, 22 …… Groove die

 ─────────────────────────────────────────────────── (72) Inventor Masahiko Sakamoto 3-8-11-202 Tsuji, Urawa-shi, Saitama Prefecture (72) Mitsuo Yamada 4-8-30 Ogimachiya, Iruma City, Saitama Prefecture

Claims (2)

[Claims] 1. A seal groove having a substantially U-shaped cross section is provided at a peripheral edge of an opening by inserting and bonding a leg portion of a lens, and a pair of vertical walls parallel to each other and a bottom surface are provided with the seal groove. In a method of molding a housing of a vehicle lamp, which comprises a hook receiving portion for hooking a hook provided at an appropriate position on a leg portion of a lens, the hook receiving portion is an opening portion of one vertical wall of the seal groove. A vehicle which is formed by a slide mold which is formed as a protrusion projecting toward the other vertical wall in the vicinity and is slid in the seal groove by at least the width of the protrusion along the groove direction. Method for molding housing of lighting fixture. 2. A vehicle lamp comprising a housing formed by the molding method according to claim 1.