Front and back welded and sealed lamp

Abstract

The lamp comprises a front shell, a middle shell and a bottom shell, a lamplight illumination assembly is contained in a space defined by the front shell, the middle shell and the bottom shell, a plurality of sections of transverse platforms protruding outwards are arranged on the middle shell, and the transverse platforms are arranged on the middle shell. Joint parts formed by ultrasonic welding in two directions of the front shell and the bottom shell exist between every two of the front shell, the middle shell and the bottom shell, a multi-time bending structure is formed by a transverse platform arranged on the middle shell, the first welding is not influenced by the second welding, the reject ratio is reduced, the assembly error is smaller, and the production efficiency is improved. The appearance is more attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamp manufacturing, in particular to a lamp with positive and negative welding sealing. Background Art

[0002] At present, the main sealing methods for signal lights of car lights are: welding sealing, glue sealing, sealing ring sealing, etc., or a combination of two methods, such as glue sealing + sealing ring sealing, etc. Figure 1 As shown, ultrasonic welding is one of the methods with relatively good waterproof effect. Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects are rubbed against each other to form a fusion between the molecular layers. One of the two objects to be welded is set with a welding rib or welding position as a tip, and the other is set with a flat surface or a recessed part, which is equivalent to applying pressure externally to combine the two. However, in terms of technology, ultrasonic welding can only be used once, because the energy of the vibration during the second ultrasonic welding will affect the position of the first welding, and even crack or fall off, resulting in counterproductive effects. Therefore, ultrasonic welding and glue sealing or sealing ring sealing are generally used in combination. The sealing of these two methods, during assembly, due to the elasticity of the sealing ring, needs to be combined with the buckle to achieve extrusion sealing, but there will be problems of difficult assembly. When pressing the lampshade with a finger, due to the elasticity of the sealing ring, it takes a lot of force to get it stuck in the buckle of the lamp housing, resulting in extremely low production efficiency. At the same time, if the pressure is not in place, the sealing surface will also leak, leading to serious quality problems. For example, Chinese patent CN202021789367.3 discloses a trunk switch with an integrated license plate light, in which a sealing ring is installed between the vehicle body mounting frame and the second limiting ring to form a first waterproof structure. At the same time, the annular welding groove and the annular welding rib are melted into one by ultrasonic welding to form a second waterproof structure.

[0003] Chinese patent CN202321027833.8 discloses a waterproof lamp assembly and a lighting lamp waterproof lamp assembly including a lamp housing, a face ring, a light-transmitting cover and a light source assembly. An opening is provided at the bottom of the lamp housing, the face ring covers the opening of the lamp housing and is sealed and connected to the bottom of the lamp housing, the light-transmitting cover covers the light outlet of the face ring and is sealed and connected to the face ring, the lamp housing, the face ring and the light-transmitting cover are jointly arranged to form a closed optical cavity, and the light source assembly is arranged in the optical cavity and emits light toward one side of the light-transmitting cover. Since the lamp housing and the face ring, and the face ring and the light-transmitting cover are all sealed, and the light source assembly is contained in a closed optical cavity, the waterproof lamp assembly has good waterproof and dustproof performance and is safer and more reliable. The lamp housing is a result of full wrapping, with only a welding sealing position left on one side. Although there are two welding sealing positions, only one ultrasonic welding is actually required, and the lamp housing is a fully wrapped one-piece structure, which is not applicable to lamp housings with variable appearances. Utility Model Content

[0004] (I) Technical problems solved: In view of the shortcomings of the prior art, the utility model provides a lamp with positive and negative welding sealing, which is capable of performing two ultrasonic welding on one lamp, thereby solving the problem that the secondary ultrasonic welding affects the sealing performance of the primary welding of the lamp.

[0005] (II) Technical solution: In order to achieve the purpose of improving the sealing performance of the lamp by the above-mentioned secondary ultrasonic welding, the utility model provides the following technical solution:

[0006] A lamp with positive and negative welding sealing, the exterior of the lamp includes a front shell, a middle shell and a bottom shell, the space enclosed by the front shell, the middle shell and the bottom shell accommodates a lighting assembly, the middle shell is provided with a plurality of outwardly protruding transverse platforms, and there are joints between the front shell, the middle shell and the bottom shell formed by ultrasonic welding from two directions of the front shell and the bottom shell.

[0007] In a preferred embodiment of the present invention, the joint portion includes matching protrusions and welding grooves on the front shell, the middle shell and the bottom shell.

[0008] In a preferred embodiment of the present invention, a protruding welding rib is provided on the top of the protrusion or the bottom of the welding groove.

[0009] In a preferred embodiment of the present invention, the lighting assembly includes a thick-walled PCB board for light guidance and an onboard LED light source.

[0010] In a preferred solution of the present utility model, the front shell is specifically a lampshade or is formed by a thick-walled end portion of the lighting assembly.

[0011] In the preferred embodiment of the utility model, the thick wall is an integrally molded plastic part having a light incident surface, a screw hole and a light emitting surface. The light incident surface is composed of a plurality of bosses. The light emitted by the LED light source is incident from the bosses, refracted twice through the thick wall inner cavity, and then projected from the light emitting surface. The light emitting surface is a rough corrugated shape with better light scattering effect. The thick wall is fixed to the bottom shell by clamping the PCB board with screws through the screw holes.

[0012] In a preferred embodiment of the present invention, the thick wall is made of PMMA material.

[0013] In a preferred embodiment of the present invention, the lampshade is in the shape of an elongated strip and is an integrally formed plastic part, and the material of the lampshade is ABS, PP or PC.

[0014] In a preferred embodiment of the present invention, the middle shell and the bottom shell are integrally formed plastic parts, which are black and opaque, and a support for supporting the thick wall and fixing the PCB board is provided on the bottom shell.

[0015] In a preferred embodiment of the present invention, the middle shell gradually narrows along the direction from the bottom shell to the front shell.

[0016] (III) Beneficial effects: Compared with the prior art, the utility model provides a lamp with positive and negative welding sealing, which has the following beneficial effects:

[0017] 1. Use ultrasonic welding with relatively good waterproof effect more than twice. Due to the multiple bending structures formed by the transverse platform set in the middle shell of this application, the energy transfer of the ultrasonic wave will decrease step by step. The second welding will not affect the first welding, which reduces the defective rate, makes the assembly error smaller, and makes the appearance more beautiful.

[0018] 2. The combined structure of welding ribs and annular welding grooves is used for welding, so that the residues produced by welding remain in the annular welding grooves, thereby preventing the problem of plastic residue splashing.

[0019] 3. Two ultrasonic welding steps are used to increase the space utilization of the lamp, reduce the design difficulty of the lamp, meet the lamp structure with various shapes, and greatly improve the waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an explosion diagram of the first embodiment of the utility model;

[0021] Figure 2 It is a cutaway schematic diagram of the first embodiment of the utility model;

[0022] Figure 3 It is a cross-sectional schematic diagram of the second embodiment of the utility model;

[0023] Figure 4 It is a cross-sectional schematic diagram of the third embodiment of the utility model;

[0024] In the figure: 100, lampshade; 200, middle shell; 300, thick wall; 310, screw; 320, screw hole; 400, PCB board; 410, LED light source; 500, bottom shell; 610, protrusion; 620, welding groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1: Please refer to Figure 1-Figure 2 The exterior of the lamp includes a front shell, a middle shell 200 and a bottom shell 500. The space enclosed by the front shell, the middle shell 200 and the bottom shell 500 contains a lighting assembly. The front shell is composed of a lampshade 100, which is a long strip-shaped and integrally formed plastic part. The lighting assembly includes a thick wall 300 for light guide and a PCB board 400 with an onboard LED light source 410. The middle shell 200 is provided with a plurality of transverse platforms protruding outward. There are joints formed by ultrasonic welding from the lampshade 100 and the bottom shell 500 between the front shell, the middle shell 200 and the bottom shell 500.

[0027] The lamp has two sealing surfaces, the lampshade and the decorative part constitute the first sealing surface, and the decorative part and the bottom shell constitute the second sealing surface of the lamp. When sealing, the first welding is performed from top to bottom, so that the first sealing surface of the lampshade and the decorative part can be welded; the second welding is performed from bottom to top, so that the second sealing surface of the bottom shell and the decorative part can be welded. The first sealing surface and the second sealing surface constitute the joint.

[0028] The first sealing surface and the second sealing surface are both welded by ultrasonic welding. However, the welding directions are different. If the welding direction of the second sealing surface is also welded from top to bottom, the following problems will occur:

[0029] 1. The welding surface of the first sealing surface becomes loose;

[0030] 2. If the distance that the ultrasonic energy is transmitted to the second sealing surface is too long, the energy will be weakened and the welding surface will not achieve a good sealing effect.

[0031] Therefore, the welding directions of the first sealing surface and the second sealing surface need to be opposite.

[0032] The middle housing 200 is gradually narrowed in a direction from the bottom housing 500 to the front housing.

[0033] The joint portion includes a protrusion 610 and a welding groove 620 that are matched with each other on the front housing, the middle housing 200 and the bottom housing 500. A protruding welding rib is provided on the top of the protrusion 610 or the bottom of the welding groove 620.

[0034] The thick wall 300 is an integrally formed plastic part, having a light incident surface, a screw hole and a light emitting surface. The light incident surface is composed of a plurality of bosses. The light emitted by the LED light source is incident from the bosses, refracted twice by the thick wall cavity, and then projected from the light emitting surface. The light emitting surface is a rough corrugated shape with a better light scattering effect. The thick wall is fixed to the bottom shell 500 by the screw 310 through the screw hole 320 by clamping the PCB board 400. The thick wall 300 is made of PMMA material. The material of the lampshade 100 is preferably ABS. In addition to the advantages of tensile strength and impact strength, ABS plastic also has good rigidity and dimensional stability. ABS can usually be molded at above 160°C and has good thermal stability during the molding process. PP or PC are the next best choices.

[0035] The middle shell 200 and the bottom shell 500 are integrally formed plastic parts, which are black and opaque. The bottom shell 500 is provided with a support for supporting the thick wall 300 and fixing the PCB board 400.

[0036] The structural design of this embodiment reaches a critical value. If the middle shell 200 has fewer lateral platforms or a smaller size, the second ultrasonic welding will affect the first welding, causing the first sealing surface to crack or fall off under the influence of the second welding, affecting the waterproof effect.

[0037] Example 2: See Figure 3 On the basis of the first embodiment, the middle shell 200 has more transverse platforms, and transverse platforms are arranged on both sides of the middle shell 200. The energy of the ultrasonic wave will decrease gradually in more transverse platforms, so that the second welding will not affect the first one.

[0038] Example 3: See Figure 4 Compared with the first embodiment, the front housing 100 is formed by the thick-walled end of the lighting assembly.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front and back welded sealed lamp, the exterior of the lamp comprising a front shell, a middle shell (200) and a bottom shell (500), a lighting assembly being accommodated in a space enclosed by the front shell, the middle shell (200) and the bottom shell (500), characterized in that: The middle shell (200) is provided with a plurality of outwardly protruding transverse platforms, and joints formed by ultrasonic welding from two directions of the front shell and the bottom shell (500) exist between each of the front shell, the middle shell (200) and the bottom shell (500).

2. A front and back welding sealed lamp according to claim 1, characterized in that: The joint portion comprises a protrusion (610) and a welding groove (620) which are matched with each other on the front shell, the middle shell (200) and the bottom shell (500).

3. A front and back welding sealed lamp according to claim 2, characterized in that: A protruding welding rib is provided on the top of the protrusion (610) or the bottom of the welding groove (620).

4. The lamp with positive and negative welding sealing according to claim 1, characterized in that: The lighting assembly comprises a thick wall (300) for light guidance and a PCB board (400) with an onboard LED light source (410).

5. The lamp with positive and negative welding sealing according to claim 4, characterized in that: The front shell is specifically a lampshade (100) or is formed by the end of a thick wall (300) in the lighting assembly.

6. The lamp with positive and negative welding sealing according to claim 4, characterized in that: The thick wall (300) is an integrally formed plastic part having a light incident surface, a screw hole and a light emitting surface. The light incident surface is composed of a plurality of bosses. Light emitted by the LED light source (410) is incident from the bosses, refracted twice by the thick wall inner cavity, and then projected from the light emitting surface. The light emitting surface is in a rough corrugated shape. The thick wall is fixed to the bottom shell (500) by clamping the PCB board (400) with screws (310) through the screw holes (320).

7. The lamp with positive and negative welding sealing according to claim 4, characterized in that: The thick wall (300) is made of PMMA material.

8. The lamp with positive and negative welding sealing according to claim 5, characterized in that: The lampshade (100) is in the shape of a long strip and is an integrally formed plastic part; the material of the lampshade (100) is ABS, PP or PC.

9. The front and back welding sealed lamp according to claim 4, characterized in that: The middle shell (200) and the bottom shell (500) are integrally formed plastic parts, and are black and opaque. A support for supporting the thick wall (300) and fixing the PCB board (400) is provided on the bottom shell (500).

10. The lamp with positive and negative welding sealing according to claim 9, characterized in that: The middle shell (200) gradually narrows in a direction from the bottom shell (500) to the front shell.

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