Car lamp sealing structure beneficial to locking

Abstract

The utility model belongs to the technical field of automobile lamps, and particularly relates to an automobile lamp sealing structure beneficial to locking, which comprises a sealing ring, a screw and a lamp shell, the sealing ring comprises a body and a boss body, the body is sleeved outside the boss body, the axial thickness of the boss body is smaller than that of the body, and an annular plane is formed on the boss body; the screw is sleeved with the sealing ring, and the annular plane is attached to the peripheral face of the screw. The lamp shell is arranged outside the screw in a sleeving mode, a groove is formed in the lamp shell, the sealing ring is arranged in the groove, according to the automobile lamp sealing structure beneficial to locking, the annular plane is attached to the peripheral face of the screw, the design of face-to-face attachment is utilized, the sealing performance is guaranteed, and the problem that locking is clamped due to movement is solved; the section of the body is designed to be circular, so that the sealing performance is good, the automatic locking nail clamping rate is extremely low during assembly, the compression amount is small, the needed locking torque is small, and assembly is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile lamps, and in particular relates to a sealing structure of an automobile lamp which is conducive to locking. Background Art

[0002] Headlights refer to the lamps on vehicles, which are generally composed of headlight housing, lamp holder and light source. They are lighting tools for vehicles to illuminate the road when driving at night, and are also prompt tools for pedestrians and other vehicles to send various vehicle driving signals. If the headlights are not working well, the driver will not be able to see the road conditions clearly, and pedestrians and other vehicles will not be able to receive the prompt signals, which can easily cause traffic accidents. However, during use, one of the common problems of headlights is the appearance of fog inside the lamp. The headlight housing is usually connected to the lamp holder through a sealing ring. If the seal is not good, water may seep into the headlight. The fog inside the headlight will not only affect the driver's vision, but also damage the internal components, affecting the normal service life of the headlight.

[0003] The prior art generally uses an O-shaped rubber ring with a perfect circular cross section or a flat rubber ring with a rectangular cross section to achieve sealing. However, the following problems still exist:

[0004] On the one hand, there is a problem of movement when using an O-shaped rubber ring with a perfect circular cross-section to cooperate with the screw, which leads to the problem of automatic locking of the nails during assembly on the headlight assembly line;

[0005] On the other hand, the use of a flat rubber ring with a rectangular cross-section in conjunction with a screw solves the problem of movement, but the shape and size of the screw are strictly required. If the thread root of the screw is chamfered or tapered, the inner ring of the flat rubber ring may be easily deformed, and the problem of automatic locking and staples may still occur during assembly. Moreover, compared with an O-ring, a flat rubber ring requires a larger amount of compression during assembly, and has a larger expanded volume after compression. Therefore, more space needs to be reserved when designing the headlight housing or lamp holder to accommodate the flat rubber ring. Also, due to the large amount of compression required for the flat rubber ring, a larger torque is required to complete the locking during assembly. Utility Model Content

[0006] In view of this, in order to solve the problems existing in the prior art, the purpose of the utility model is to provide a headlight sealing structure that is conducive to locking, which has the advantages of good sealing performance, extremely low automatic locking rate during assembly, small compression, small locking torque required, and easy assembly.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A sealing structure for a vehicle lamp that is convenient for locking, comprising:

[0009] A sealing ring, the sealing ring comprising a body and a boss body, the body and the boss body are both arranged in an annular structure, the body is sleeved on the outside of the boss body, the thickness of the boss body along the axial direction is smaller than the thickness of the body along the axial direction, and the boss body forms an annular plane;

[0010] The sealing ring is sleeved on the outside of the screw, and the annular plane is in contact with the outer peripheral surface of the screw;

[0011] The lamp housing is sleeved on the outside of the screw, a groove is formed on the lamp housing, and the sealing ring is arranged in the groove.

[0012] The specific technical effect is: the annular plane of the boss body is fitted onto the outer peripheral surface of the screw, which not only ensures the sealing between the sealing ring and the screw, but also solves the problem of automatic locking and jamming of the nail during assembly on the car lamp assembly production line due to the movement of the rubber ring caused by incomplete threads, chamfers and fillets at the root of the screw. The design of the main body not only ensures the sealing between the sealing ring and the lamp housing, but also solves the problem that the compressed sealing ring occupies a large space and has a large compression amount, resulting in a large locking torque. Moreover, since the axial thickness of the boss body is smaller than the axial thickness of the main body, even if there are incomplete threads, chamfers and fillets at the root of the screw, it will not cause jamming during assembly.

[0013] Furthermore, it also includes: a lamp holder, the lamp housing is arranged at the upper end of the lamp holder, and the screw passes through the sealing ring and the lamp housing in sequence and extends into the lamp holder.

[0014] Furthermore, the screw includes a disk head and a nail body, and a first step surface is formed at the connection between the disk head and the nail body, the first step surface abuts against the upper end surface of the lamp housing, the sealing ring is sleeved on the outside of the nail body, and the annular plane fits the outer circumferential surface of the nail body.

[0015] The specific technical effect is: by setting the disc head portion, a first step surface is formed at the connection between the disc head portion and the nail body portion, and the sealing ring is compressed and abuts against the first step surface to limit the sealing ring and ensure sealing.

[0016] Furthermore, a through hole is provided on the lamp housing, the through hole and the groove are coaxially arranged, a second step surface is formed at the connection between the through hole and the groove, and the upper end and the lower end of the body respectively abut against the first step surface and the second step surface.

[0017] The specific technical effect is: the through hole design ensures that the nail body can penetrate the lamp housing and then connect with the lamp holder, and also forms a second step surface at the connection between the through hole and the groove. After the sealing ring is compressed, it rests on the second step surface to limit the sealing ring and ensure the sealing.

[0018] Furthermore, a mounting hole is provided on the lamp holder, and the nail body sequentially penetrates the boss body and the through hole and extends into the mounting hole.

[0019] Furthermore, the outer periphery of the nail body is provided with an external thread, and the mounting hole is provided with an internal thread matching the external thread.

[0020] The specific technical effect is: the screw and the lamp holder are connected by threads, which makes disassembly and assembly convenient and the installation is more secure.

[0021] Furthermore, the thread profile of the external thread is a PT thread profile.

[0022] Furthermore, the cross-sectional shape of the main body along the axial direction is circular, and the cross-sectional shape of the boss body along the axial direction is rectangular.

[0023] The specific technical effects are: the cross-section of the main body is designed to be circular, which does not require too much compression and locking torque during assembly, making it easy to assemble, and the circular structure has a smaller expansion volume after compression, and does not require more space to accommodate the sealing ring; the cross-section of the boss body is designed to be rectangular, in order to ensure that the surface that fits with the outer peripheral surface of the screw is an annular plane. This design is adopted to prevent the locking nail from being stuck due to the movement of the sealing ring such as skewing or slipping during assembly, thereby avoiding the problem of assembly equipment getting stuck.

[0024] Furthermore, the diameter of the circle is D1, and the range of D1 is 1.8 mm to 2.2 mm.

[0025] Furthermore, the outer contour diameter of the boss body is D2, and the range of D2 is 3.3mm to 3.7mm. The inner contour diameter of the boss body is D3, and the range of D3 is 2.9mm to 3.1mm. The thickness of the boss body is L, and the range of L is 0.4mm to 0.5mm.

[0026] The beneficial effects of the utility model are:

[0027] (1) The annular plane of the boss body is attached to the outer peripheral surface of the screw, which not only ensures the sealing between the sealing ring and the screw, but also solves the problem of automatic locking of the pins during assembly on the vehicle lamp assembly line due to movement.

[0028] (2) The circular cross-section design of the main body not only ensures the sealing between the sealing ring and the lamp housing, but also solves the problem of large locking torque caused by the large space occupied by the compressed sealing ring and the large compression amount. It has the advantages of good sealing performance, extremely low automatic locking rate during assembly, small compression amount, small required locking torque, and easy assembly.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the sealing ring of the utility model;

[0033] Figure 3 yes Figure 2 AA cross-sectional view.

[0034] In the figure:

[0035] 1. Sealing ring; 2. Main body; 3. Boss body; 4. Annular plane; 5. Screw; 6. Lamp housing; 7. Groove; 8. Lamp holder; 9. Pan head; 10. Nail body; 11. First step surface; 12. Through hole; 13. Second step surface; 14. Mounting hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0037] See also Figure 1As shown, a sealing structure of a vehicle lamp which is conducive to locking, includes: a sealing ring 1, a screw 5 and a lamp housing 6, wherein the sealing ring 1 includes a main body 2 and a boss body 3, the main body 2 and the boss body 3 are both arranged in an annular structure, the main body 2 is sleeved on the outside of the boss body 3, the axial thickness of the boss body 3 is smaller than the axial thickness of the main body 2, and the boss body 3 forms an annular plane 4; the sealing ring 1 is sleeved on the outside of the screw 5, and the annular plane 4 fits the outer circumferential surface of the screw 5; the lamp housing 6 is sleeved on the outside of the screw 5, and a groove 7 is provided on the lamp housing 6, and the sealing ring 1 is arranged in the groove 7.

[0038] It should be noted that: by the annular plane 4 of the boss body 3 being attached to the outer peripheral surface of the screw 5, the sealing between the sealing ring 1 and the screw 5 is ensured, and the problem of automatic locking and jamming during assembly on the headlight assembly line caused by the movement of the rubber ring due to incomplete threads, chamfers and fillets at the root of the screw 5 is solved. The design of the main body 2 not only ensures the sealing between the sealing ring 1 and the lamp housing 6, but also solves the problem that the compressed sealing ring 1 occupies a large space and has a large compression amount, resulting in a large locking torque. In addition, since the axial thickness of the boss body 3 is smaller than the axial thickness of the main body 2, even if there are incomplete threads, chamfers and fillets at the root of the screw 5, jamming will not occur during assembly.

[0039] There is a gap between the upper end surface of the body 2 and the upper end surface of the boss body 3 , and the upper end surface of the body 2 is closer to the upper end of the screw 5 .

[0040] It should be noted that this design forms a gap between the upper end surface of the main body 2 and the upper end surface of the boss body 3 to prevent the problem of automatic locking of the staples during assembly on the headlight assembly line due to movement of incomplete threads, chamfers and fillets at the root of the screw 5.

[0041] The main body 2 and the boss body 3 are integrally connected, and both the main body 2 and the boss body 3 are made of elastically deformable rubber material.

[0042] The lamp also includes a lamp holder 8 , a lamp housing 6 arranged at the upper end of the lamp holder 8 , and a screw 5 sequentially penetrates the sealing ring 1 and the lamp housing 6 and extends into the lamp holder 8 .

[0043] It should be noted that the lamp housing 6 and the lamp holder 8 are fixedly connected together by the sealing ring 1 and the screw 5, and have a sealing effect, which can prevent moisture, dust and insects from entering the lamp holder 8 and damaging the internal components, thus affecting the normal service life of the lamp.

[0044] The screw 5 includes a disc head 9 and a nail body 10. A first step surface 11 is formed at the connection between the disc head 9 and the nail body 10. The first step surface 11 is against the upper end surface of the lamp housing 6. The sealing ring 1 is sleeved on the outside of the nail body 10, and the annular plane 4 fits the outer peripheral surface of the nail body 10.

[0045] It should be noted that the outer diameter of the disc head portion 9 is greater than the outer diameter of the nail body portion 10. By arranging the disc head portion 9, a first step surface 11 is formed at the connection between the disc head portion 9 and the nail body portion 10. After the sealing ring 1 is compressed, the upper end surface of the main body 2 abuts against the first step surface 11 to limit the sealing ring 1 and ensure the sealing performance.

[0046] A through hole 12 is formed on the lamp housing 6. The through hole 12 and the groove 7 are coaxially arranged. A second step surface 13 is formed at the connection between the through hole 12 and the groove 7. The upper end and the lower end of the body 2 are respectively against the first step surface 11 and the second step surface 13.

[0047] It should be noted that the diameter of the through hole 12 is smaller than the diameter of the groove 7. The design of the through hole 12 ensures that the nail body 10 can penetrate the lamp housing 6 and then be connected to the lamp holder 8, and a second step surface 13 is formed at the connection between the through hole 12 and the groove 7. After the sealing ring 1 is compressed, the lower end surface of the main body 2 abuts against the second step surface 13 to limit the sealing ring 1 and ensure the sealing performance.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0049] The utility model also has the following implementation methods based on the above:

[0050] The lamp holder 8 is provided with a mounting hole 14 , and the nail body 10 passes through the boss body 3 and the through hole 12 in sequence and extends into the mounting hole 14 .

[0051] The outer periphery of the nail body 10 is provided with an external thread, and the mounting hole 14 is provided with an internal thread matching the external thread.

[0052] It should be noted that the screw 5 and the lamp holder 8 are connected by threads, which facilitates disassembly and assembly and makes the installation more secure.

[0053] The thread profile of the external thread is PT profile.

[0054] The cross-section shape of the main body 2 along the axial direction is circular, and the cross-section shape of the boss body 3 along the axial direction is rectangular.

[0055] It should be noted that: the cross-section of the main body 2 is designed to be circular, and does not require too much compression and locking torque during assembly, which is convenient for assembly. In addition, the circular structure has a smaller expanded volume after compression, and no more space is needed to accommodate the sealing ring 1; the cross-section of the boss body 3 is designed to be rectangular, in order to ensure that the surface that fits with the outer peripheral surface of the screw 5 is the annular plane 4. This design is adopted to prevent the locking nail from being stuck due to the movement of the sealing ring 1 such as skewing or slipping during assembly, thereby avoiding the problem of jamming of the assembly equipment.

[0056] See also Figures 2 to 3 As shown, the diameter of the circle is D1, and the range of D1 is 1.8 mm to 2.2 mm.

[0057] The outer diameter of the boss body 3 is D2, and the range of D2 is 3.3mm-3.7mm. The inner diameter of the boss body 3 is D3, and the range of D3 is 2.9mm-3.1mm. The thickness of the boss body 3 is L, and the range of L is 0.4mm-0.5mm.

[0058] In summary, the beneficial effects of the utility model are:

[0059] (1) The annular plane 4 of the boss body 3 is fitted on the outer peripheral surface of the screw 5. This surface-to-surface fitting design not only ensures the sealing between the sealing ring 1 and the screw 5, but also solves the problem of automatic locking of the staples during assembly on the vehicle lamp assembly line due to movement.

[0060] (2) The circular cross-section design of the main body 2 not only ensures the sealing between the sealing ring 1 and the lamp housing 6, but also solves the problem that the compressed sealing ring 1 occupies a large space and has a large compression amount, which leads to a large locking torque. It has the advantages of good sealing performance, extremely low automatic locking rate during assembly, small compression amount, small required locking torque, and easy assembly.

[0061] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0062] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sealing structure for a vehicle lamp that facilitates locking, characterized in that: include: A sealing ring (1), the sealing ring (1) comprising a body (2) and a boss body (3), the body (2) and the boss body (3) both being arranged in an annular structure, the body (2) being sleeved on the outside of the boss body (3), the thickness of the boss body (3) along the axial direction being smaller than the thickness of the body (2) along the axial direction, and the boss body (3) forming an annular plane (4); The screw (5) is provided with the sealing ring (1) sleeved on the outside of the screw (5), and the annular plane (4) is in contact with the outer peripheral surface of the screw (5); A lamp housing (6), wherein the lamp housing (6) is sleeved on the outside of the screw (5), a groove (7) is provided on the lamp housing (6), and the sealing ring (1) is arranged in the groove (7).

2. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 1, characterized in that: Also includes: A lamp holder (8), wherein the lamp housing (6) is arranged at the upper end of the lamp holder (8), and the screw (5) sequentially penetrates the sealing ring (1) and the lamp housing (6) and extends into the lamp holder (8).

3. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 2, characterized in that: The screw (5) comprises a disk head portion (9) and a nail body portion (10), wherein a first step surface (11) is formed at the connection between the disk head portion (9) and the nail body portion (10), wherein the first step surface (11) abuts against the upper end surface of the lamp housing (6), the sealing ring (1) is sleeved on the outside of the nail body portion (10), and the annular plane (4) fits the outer peripheral surface of the nail body portion (10).

4. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 3, characterized in that: A through hole (12) is provided on the lamp housing (6), the through hole (12) and the groove (7) are coaxially arranged, a second step surface (13) is formed at the connection between the through hole (12) and the groove (7), and the upper end and the lower end of the body (2) respectively abut against the first step surface (11) and the second step surface (13).

5. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 4, characterized in that: The lamp holder (8) is provided with a mounting hole (14), and the nail body (10) sequentially penetrates the boss body (3) and the through hole (12) and extends into the mounting hole (14).

6. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 5, characterized in that: The outer periphery of the nail body (10) is provided with an external thread, and the mounting hole (14) is provided with an internal thread matching the external thread.

7. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 6, characterized in that: The thread profile of the external thread is a PT thread profile.

8. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 1, characterized in that: The cross-sectional shape of the main body (2) along the axial direction is circular, and the cross-sectional shape of the boss body (3) along the axial direction is rectangular.

9. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 8, characterized in that: The diameter of the circle is D1, and the range of D1 is 1.8 mm to 2.2 mm.

10. A sealing structure for a vehicle lamp that facilitates locking as claimed in claim 1, characterized in that: The outer contour diameter of the boss body (3) is D2, and the range of D2 is 3.3mm to 3.7mm. The inner contour diameter of the boss body (3) is D3, and the range of D3 is 2.9mm to 3.1mm. The thickness of the boss body (3) is L, and the range of L is 0.4mm to 0.5mm.

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