Circuit board fixing structure and vehicle lamp

Abstract

The circuit board fixing structure comprises a first reflective bowl, a second reflective bowl, a first fixing column and a screw column, the first reflective bowl is closer to the outer side than the second reflective bowl, the first reflective bowl is closer to the circuit board than the second reflective bowl, the screw column is located on the back of the first reflective bowl, and the first fixing column is located on the back of the second reflective bowl. The first fixing column and the screw column are connected through a first rib plate, the first fixing column is provided with a second rib plate, a certain angle is formed between the second rib plate and the first rib plate, and the thickness of the first rib plate and the thickness of the second rib plate are smaller than that of the first reflection bowl or the second reflection bowl. The circuit board is provided with screw holes and first fixing holes corresponding to the screw columns and the first fixing columns in position so that the circuit board can be installed on the screw columns through screws. The automobile lamp comprises the circuit board fixing structure, the circuit board can be better fixed through the screw columns and the first fixing columns, the position of a light source on the circuit board is more stable and not prone to deviation, and the better visual effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the fields of vehicle lamp parts and vehicle lamps, and particularly relates to a circuit board fixing structure and a vehicle lamp. Background Art

[0002] As Figure 1 shown, the structures of some current vehicle lamps include a front lamp cover 1 and a rear lamp cover 2. For aesthetic purposes, they are designed in a crescent shape that extends and converges from both sides towards the middle, and the inclination angle of their relative central region often approaches or reaches 90 degrees. Some existing vehicle lamps use the method of thick-wall diffused light to achieve the functions of the brake lamp, position lamp, and left and right turn signals of the rear lamp. However, this method is relatively expensive and has low brightness, which is not conducive to cost reduction and efficiency improvement. Using a reflector bowl has a lower cost, and the brightness of the projected and reflected light can also be higher. However, the space occupied by the arrangement of the reflector bowl is larger.

[0003] Currently, there is a problem of insufficient reflection space inside the vertical side of the rear lamp body, and the circuit board cannot be fixed. A circuit board fixing structure is needed to fix the circuit board so that the circuit board can be inserted into a structure with space limitations. Chinese Patent Application No. CN2021234510879 discloses a circuit board connection structure and a lamp. By setting a pressing plate structure, the pressing plate and the circuit board are vertically arranged, so that the circuit board can be inserted into the vertical side reflection space inside the lamp body, thereby realizing the fixation of the circuit board. This method can be used for the reflector bowl that realizes the braking function. In the middle area of the rear lamp, the lamp body is relatively flat, and multiple reflector bowls can be arranged side by side. Only a pressing plate structure needs to be made on the back side of one reflector bowl to fix the entire circuit board.

[0004] However, this method is not applicable at the left and right turn positions on both sides. Since both sides are relatively vertical, if long screw posts are formed on the back side of the reflector bowl, due to the large volume of the screw posts, the reflector bowl and the screw posts are generally integrally formed by injection molding. The thickness difference between the reflector bowl and the screw posts will cause serious shrinkage of the reflector bowl. Since the outside of the reflector bowl cools quickly and the middle area cools slowly, if a long and thick screw post is set in the middle, it will cause depression during shrinkage due to excessive weight, and combined with slow cooling, it is very easy to cause shrinkage deformation, resulting in a significant decrease in the product qualification rate. Summary of the Utility Model

[0005] Aiming at the above-mentioned prior art, the purpose of the utility model is to provide a circuit board fixing structure and a vehicle lamp with a higher product qualification rate.

[0006] The technical solution of the present utility model is realized as follows: a circuit board fixing structure, including a first reflecting bowl, a second reflecting bowl, a first fixing post and a screw post. The first reflecting bowl is closer to the outside and the circuit board than the second reflecting bowl. The first fixing post and the screw post are arranged on the first reflecting bowl or the second reflecting bowl. The circuit board includes a first circuit board and a second circuit board. The first circuit board or the second circuit board is limited or fixed to the first reflecting bowl or the second reflecting bowl through the first fixing post and the screw post, and the first circuit board and the second circuit board are perpendicular to each other.

[0007] The beneficial effects of such a design are as follows: the lamp beads are generally directly fixed on the circuit board. The perpendicularity of the first circuit board and the second circuit board can emit light sources in two mutually perpendicular directions, so as to achieve the emission of light sources in different directions to obtain different lighting effects, produce different visual effects, make the whole more beautiful, the structure more compact, and occupy less space.

[0008] Furthermore, the screw post is located at the back of the first reflecting bowl, the first fixing post is located at the back of the second reflecting bowl. The first fixing post and the screw post are connected by a first rib plate. The first fixing post is provided with a second rib plate, and the second rib plate forms a certain angle with the first rib plate. The thicknesses of the first rib plate and the second rib plate are smaller than the thickness of the first reflecting bowl or the second reflecting bowl. The circuit board is provided with a screw hole and a first fixing hole corresponding to the positions of the screw post and the first fixing post respectively so that the circuit board can be installed on the screw post through the screw. By setting the first rib plate and the second rib plate at a certain angle, the strength of the first fixing post is increased, making the position of the first fixing post more stable. The thicknesses of the first rib plate and the second rib plate being smaller than the thickness of the first reflecting bowl or the second reflecting bowl can reduce the defects generated during the injection molding cooling process. Through the screw post and the first fixing post, the circuit board can be better fixed, making the position of the light source on the circuit board more stable and not easily shifted, and having a better visual effect.

[0009] Furthermore, the circuit board fixing structure further includes a second fixing post. The second fixing post is located at the back of the first reflecting bowl. A third rib plate is provided between the second fixing post and the screw post. In this way, the axial limit of the screw post is carried out by using the screw post, and the circumferential limit of the screw post is carried out by using the first fixing post and the second fixing post, making the position of the circuit board more stable.

[0010] Furthermore, one ends of the screw post, the first rib plate, the second rib plate and the third rib plate close to the circuit board are in the same limiting plane, and the first fixing post and the second fixing post protrude relative to the limiting plane. In this way, the circuit board is in contact with the screw post, the first rib plate, the second rib plate and the third rib plate, better limiting the circuit board, so that the circuit board is not easily shaken under strong vibration, and the light has a better visual effect.

[0011] Further, the diameters of the first fixing post and the second fixing post are less than or equal to the thickness of the first reflecting bowl or the second reflecting bowl. A smaller size has a lower possibility of generating defects during the injection molding process, and with the assistance of the rib plates, the strength of the first fixing post and the second fixing post also meets the requirements.

[0012] Further, a second stud is provided on the back of the second reflecting bowl. The height of the second stud is less than that of the screw post. A pressing plate is provided on the second stud, and the pressing plate is fixed to the second stud by screws. A limiting groove is provided on the pressing plate to limit the second circuit board, so that the circuit board can be fixed more stably.

[0013] Further, the first circuit board is provided with at least one jack, and the second circuit board is provided with at least one insert tab. When the first circuit board and the second circuit board are in the installation position, the insert tab is inserted into the jack so that the first circuit board and the second circuit board limit each other. This can simplify the fixing structure of the second circuit board. The first circuit board is used to limit the second circuit board, and the second circuit board provides a certain supporting effect on the first circuit board. The assembly is simpler, the production efficiency is increased, and the production cost is reduced.

[0014] Further, an arc-shaped rib plate is provided on the back of the first reflecting bowl. The arc-shaped rib plate extends from the screw post to the position where it abuts against the second circuit board. In this way, the second circuit board can be limited by the arc-shaped rib plate, making the position of the second circuit board more stable and the installation more convenient.

[0015] The vehicle lamp includes the above-mentioned circuit board fixing structure. Such a design has a simple molding process, convenient installation, and low production cost.

[0016] Further, the vehicle lamp is provided with a light guide bar. The light guide bar provides light sources through the lamp beads on the first circuit board. A limiting post is provided at the end of the light guide bar, and the first circuit board is provided with a limiting hole that matches the limiting post. In this way, the light guide bar can be arranged along the arc of the vehicle lamp contour, the positioning of the light guide bar and the first circuit board is more accurate, and the visual effect of the light guide bar is better after the lamp beads are lit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of an existing vehicle lamp;

[0018] Figure 2 is a three-dimensional schematic diagram of the internal structure of the vehicle lamp of the present invention;

[0019] Figure 3 is a partial schematic diagram of the position of the decorative ring and the reflecting bowl of the present invention;

[0020] Figure 4 is a partial schematic diagram of the installation state of the circuit board in Embodiment 2;

[0021] Figure 5 is a partial schematic diagram of the state where the first circuit board is not installed in Embodiment 2;

[0022] Figure 6 Schematic diagram of the second circuit board for Embodiment 2;

[0023] Figure 7 Schematic diagram of the second circuit board for Embodiment 1;

[0024] Figure 8 Partial schematic diagram of the installation state of the circuit board for Embodiment 1;

[0025] Figure 9 Partial schematic diagram of the non-installed state of the first circuit board for Embodiment 1;

[0026] Figure 10 Partial schematic diagram of the non-installed states of both the first circuit board and the second circuit board for Embodiment 1. Detailed implementation manners

[0027] As needed, detailed embodiments of the present utility model are disclosed herein, but it should be understood that the disclosed embodiments are only illustrative of the present utility model, and the present utility model can be implemented in different and alternative forms. The accompanying drawings are not necessarily drawn to scale, and some features may be exaggerated or reduced to show details of specific components. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but rather as a representative basis for teaching those skilled in the art to implement the present utility model differently. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0028] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, the circuit board fixing structure includes a first reflecting bowl 41, a second reflecting bowl 42, a first fixing post 31 and a screw post 21. The first reflecting bowl 41 is closer to the outside relative to the second reflecting bowl 42, and the first reflecting bowl 41 is closer to the circuit board 6 relative to the second reflecting bowl 42. The screw post 21 is located at the back of the first reflecting bowl 41, and the first fixing post 31 is located at the back of the second reflecting bowl 42. The first fixing post 31 and the screw post 21 are connected by a first rib plate 23. The first fixing post 31 is provided with a second rib plate 24, and the second rib plate 24 forms a 90-degree angle with the first rib plate 23. Since they are non-parallel, there is a certain complementary effect and it is not easy to deform. The thicknesses of the first rib plate 23 and the second rib plate 24 are less than the thicknesses of the first reflecting bowl 41 or the second reflecting bowl 42. The circuit board 6 is provided with a screw hole 60 and a first fixing hole 69 corresponding to the positions of the screw post 21 and the first fixing post 31 respectively, so that the circuit board 6 can be installed on the screw post 21 through screws.

[0029] As Figure 3As shown, the reflector bowl 4 includes a first reflector bowl 41, a second reflector bowl 42, a third reflector bowl 43, and a brake reflector bowl 44. The first reflector bowl 41 is located at the outermost side of the vehicle lamp. The first reflector bowl 41, the second reflector bowl 42, and the third reflector bowl 43 are mainly used for reflecting the light source of the turn signal. The first reflector bowl 41, the second reflector bowl 42, and the third reflector bowl 43 are arranged along an inclined arc. The shapes of the first reflector bowl 41, the second reflector bowl 42, and the third reflector bowl 43 are restricted by the shapes of adjacent structures. In front of the first reflector bowl 41, the second reflector bowl 42, and the third reflector bowl 43, there are lamp beads 7, that is, LED lamp beads.

[0030] As Figure 5 shown, the circuit board fixing structure further includes a second fixing post 32. The second fixing post 32 is located at the back of the first reflector bowl 41. There is a third rib plate 25 between the second fixing post 32 and the screw post 21. The circuit board 6 is provided with a second fixing hole 70 that matches the second fixing post 32.

[0031] As Figure 5 shown, one ends of the screw post 21, the first rib plate 23, the second rib plate 24, and the third rib plate 25 close to the circuit board 6 are in the same limiting plane, and the first fixing post 31 and the second fixing post 32 protrude relative to the limiting plane.

[0032] As Figure 5 shown, the diameters of the first fixing post 31 and the second fixing post 32 are less than or equal to the thickness of the first reflector bowl 41 or the second reflector bowl 42.

[0033] As Figure 2 、 Figure 3 and Figure 10 shown, the circuit board 6 includes a first circuit board 61 and a second circuit board 62, and the first circuit board 61 and the second circuit board 62 are perpendicular. Nearly perpendicular can also achieve good positioning, which is mainly affected by the relative positions of the light guide bar 5 and the reflector bowl 4. The third reflector bowl 43 is provided with a light pattern baffle 45, and the light pattern baffle 45 is provided with a slot 46 for snap-fitting with the second circuit board 62. The light pattern baffle 45 can also be set at other positions, such as the position of the second reflector bowl 42. As a preference, setting it at the position of the third reflector bowl 43 has a better limiting effect on the second circuit board 62.

[0034] Example 1:

[0035] As Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, the first circuit board 61 is provided with at least one jack 66, and the second circuit board 62 is provided with at least one insert 67. When the first circuit board 61 and the second circuit board 62 are in the installed position, the insert 67 is inserted into the jack 66 so that the first circuit board 61 and the second circuit board 62 limit each other. The second circuit board 62 is provided with a first light-emitting diode 71, a second light-emitting diode 72, and a third light-emitting diode 73, which respectively correspond to the first reflecting bowl 41, the second reflecting bowl 42, and the third reflecting bowl 43.

[0036] Embodiment 2:

[0037] As Figure 4 , Figure 5 and Figure 6 shown, the back of the second reflecting bowl 42 is provided with a second stud 22. The height of the second stud 22 is less than that of the first fixing post 31 and the screw post 21. A pressing plate 26 is provided on the second stud 22. The pressing plate 26 is fixed to the second stud 22 by screws. A limiting groove 27 is provided on the pressing plate 26 to limit the second circuit board 62. To reduce the height of the second stud 22, the second circuit board 62 is provided with a large groove 63, so that the position of the pressing plate 26 is closer to the second reflecting bowl 42.

[0038] As Figure 4 , Figure 5 and Figure 6 shown, the back of the first reflecting bowl 41 is provided with an arc-shaped rib 28. The arc-shaped rib 28 extends from the screw post 21 to the position where it abuts against the second circuit board 62. The second circuit board 62 is provided with a first clamping position 64 and a second clamping position 65. The first clamping position 64 is clamped with the clamping groove 46 of the light pattern baffle 45, and the second clamping position 65 forms a clamping connection with the gap between the arc-shaped rib 28 and the decorative ring 3.

[0039] Embodiment 3:

[0040] As Figure 1 and Figure 2 shown, the vehicle lamp includes the circuit board fixing structure in Embodiment 1 or Embodiment 2, and further includes a front lamp cover 1 and a rear lamp cover 2. The decorative ring 3 is installed inside the front lamp cover 1 and the rear lamp cover 2. The decorative ring 3 and the reflecting bowl 4 are integrally injection-molded, and the reflecting bowl 4 is coated with a reflective material.

[0041] As Figure 2 , Figure 4 and Figure 5 shown, the vehicle lamp is provided with a light guide bar 5. The light guide bar 5 is provided with a light source by the light-emitting diodes 7 on the first circuit board 61. The end of the light guide bar 5 is provided with a limiting post 51, and the first circuit board 61 is provided with a limiting hole 68 that matches the limiting post 51.

Claims

1. Circuit board fixing structure, comprising a first reflecting bowl (41), a second reflecting bowl (42), a first fixing post (31) and a screw post (21), wherein the first reflecting bowl (41) is closer to the outside than the second reflecting bowl (42), the first reflecting bowl (41) is closer to the circuit board (6) than the second reflecting bowl (42), the first fixing post (31) and the screw post (21) are arranged on the first reflecting bowl (41) or the second reflecting bowl (42), and the characteristics are as follows: The circuit board (6) includes a first circuit board (61) and a second circuit board (62). The first circuit board (61) or the second circuit board (62) is limited or fixed to the first reflector bowl (41) or the second reflector bowl (42) through the first fixing post (31) and the screw post (21), and the first circuit board (61) and the second circuit board (62) are perpendicular to each other.

2. The circuit board fixing structure according to claim 1, characterized in that: The screw post (21) is located on the back of the first reflector bowl (41), the first fixing post (31) is located on the back of the second reflector bowl (42), and the first fixing post (31) and the screw post (21) are connected by a first rib plate (23). The first fixing post (31) is provided with a second rib plate (24), and the second rib plate (24) forms a certain angle with the first rib plate (23). The thicknesses of the first rib plate (23) and the second rib plate (24) are less than the thickness of the first reflector bowl (41) or the second reflector bowl (42). The circuit board (6) is provided with a screw hole (60) and a first fixing hole (69) corresponding to the positions of the screw post (21) and the first fixing post (31) respectively, so that the circuit board (6) can be installed on the screw post (21) by screws.

3. The circuit board fixing structure according to claim 2, wherein: The circuit board fixing structure further includes a second fixing post (32). The second fixing post (32) is located on the back of the first reflector bowl (41), and there is a third rib plate (25) between the second fixing post (32) and the screw post (21).

4. The circuit board fixing structure according to claim 3, characterized in that: One ends of the screw post (21), the first rib plate (23), the second rib plate (24) and the third rib plate (25) close to the circuit board (6) are in the same limiting plane, and the first fixing post (31) and the second fixing post (32) protrude relative to the limiting plane.

5. The circuit board fixing structure according to claim 4, wherein: The diameters of the first fixing post (31) and the second fixing post (32) are less than or equal to the thickness of the first reflector bowl (41) or the second reflector bowl (42).

6. The circuit board fixing structure according to claim 5, characterized in that: A second stud (22) is provided on the back of the second reflector bowl (42). The height of the second stud (22) is less than that of the screw post (21). A pressing plate (26) is provided on the second stud (22), and the pressing plate (26) is fixed to the second stud (22) by screws. A limiting groove (27) is provided on the pressing plate (26) to limit the second circuit board (62).

7. The circuit board fixing structure according to claim 5, characterized in that: The first circuit board (61) is provided with at least one jack (66), and the second circuit board (62) is provided with at least one insertion piece (67). When the first circuit board (61) and the second circuit board (62) are in the installation position, the insertion piece (67) is inserted into the jack (66) so that the first circuit board (61) and the second circuit board (62) limit each other.

8. The circuit board fixing structure according to claim 7, characterized in that: An arc-shaped rib plate (28) is provided on the back of the first reflector bowl (41), and the arc-shaped rib plate (28) extends from the screw post (21) to the position where it abuts against the second circuit board (62).

9. Vehicle headlamp, characterized in that: It includes the circuit board fixing structure according to any one of claims 1-8.

10. The vehicle lamp according to claim 9, characterized in that: The vehicle lamp is provided with a light guide bar (5). The light guide bar (5) is provided with a light source by lamp beads on a first circuit board (61). A limiting post (51) is arranged at the end of the light guide bar (5), and the first circuit board (61) is provided with a limiting hole (68) matching the limiting post (51).

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