LED lamp radiator and LED lamp

Abstract

An axial buckling part and a circumferential limiting part are formed at an opening used for being connected with a lampshade, a V-shaped tooth surface is formed at the end, close to the opening, of the circumferential limiting part, and the closed end of the V-shaped tooth surface is provided with a first end close to the opening and a second end located on the radial inner side of the first end. The closed end obliquely extends from the first end to the second end in the direction extending into the radiator. The utility model further discloses an LED lamp. The inclined closed end is designed on the V-shaped tooth surface of the circumferential limiting part, so that the closed end plays a role in aligning the central axis of the lampshade and the central axis of the radiator while the two inclined side surfaces of the V-shaped tooth surface guide the lampshade to deflect in the circumferential direction; the circumferential limiting part plays a role in axial alignment and circumferential alignment at the same time, so that the circumferential limiting part can accurately fall into the target position of the lampshade, and the damage rate of the lampshade is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED lighting, in particular to an LED lamp radiator and an LED lamp. Background Art

[0002] The existing LED lamp includes a lamp cover and a radiator. During installation, an external force is usually applied to snap the lamp cover and the radiator facing each other. To ensure the accurate docking of the lamp cover and the radiator, an axial limiting structure for ensuring the axial alignment of the two is formed at the opening of the radiator. To prevent relative rotation between the lamp cover and the radiator after installation, a circumferential limiting structure for ensuring the circumferential anti-rotation of the two is formed at the opening of the radiator.

[0003] It is found in actual production that when the lamp cover and the radiator are snapped facing each other, the circumferential limiting structure cannot accurately fall into the target position of the lamp cover, resulting in the circumferential limiting structure abutting against the lamp cover and damaging the lamp cover. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an LED lamp radiator and an LED lamp, the circumferential limiting part of which not only plays an axial alignment role, but also plays a circumferential alignment role, ensuring the accurate docking of the lamp cover and the radiator and reducing the damage rate of the lamp cover or / and the radiator.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an LED lamp radiator, an axial snap part and a circumferential limiting part are formed at the opening for connecting the lamp cover. The end of the circumferential limiting part close to the opening forms a V-shaped tooth surface. The closed end of the V-shaped tooth surface has a first end close to the opening and a second end located radially inside the first end. The closed end extends obliquely from the first end to the second end along the direction extending into the radiator.

[0006] Further, the axial snap part has a guiding surface, the guiding surface has a starting end and an ending end, the starting end is close to the opening, and the guiding surface extends obliquely from the starting end to the ending end along the direction extending into the radiator. The closed end and the guiding surface at least partially overlap in the radial width direction.

[0007] Further, the starting end of the guiding surface is located radially outside the first end of the circumferential limiting part.

[0008] Further, the inclination angles of the guiding surface and the closed end of the V-shaped tooth surface are the same or tend to be the same.

[0009] Further, the ending end of the guiding surface is located radially inside the second end of the circumferential limiting part.

[0010] Further, an arc transition is formed on the side of the circumferential limiting part facing the center of the radiator.

[0011] Furthermore, the axial snap-fitting portions and the circumferential limiting portions are distributed at intervals in the circumferential direction.

[0012] The utility model also discloses an LED lamp, comprising a heat sink and a lampshade, wherein the heat sink forms an axial snap-fit ​​portion and a circumferential limiting portion at an opening connected to the lampshade, and the end of the circumferential limiting portion close to the opening forms a V-shaped tooth surface, and the closed end of the V-shaped tooth surface has a first end close to the opening and a second end located radially inside the first end, and the closed end extends obliquely from the first end to the second end along a direction extending into the heat sink.

[0013] Furthermore, the axial snap-fit ​​portion has a guide surface, which has a starting end and an end, the starting end is close to the opening, and the guide surface extends obliquely from the starting end to the end along the direction of extending into the radiator, and the closed end and the guide surface at least partially overlap in the radial width direction.

[0014] Furthermore, the starting end of the guide surface is located radially outside the first end of the circumferential limiting portion; the inclination angles of the guide surface and the closed end of the V-shaped tooth surface are the same or tend to be the same; the end of the guide surface is located radially inside the second end of the circumferential limiting portion; the lampshade has a transition neck, and a plurality of latch teeth are spaced apart on the outer periphery of the transition neck, and the latch teeth have at least three circumferentially adjacent inclined surfaces.

[0015] The beneficial effects of the utility model are as follows: 1) the V-shaped tooth surface of the circumferential limiting portion is designed with an inclined closed end, so that while the two inclined side surfaces of the V-shaped tooth surface guide the lampshade to deflect circumferentially, the closed end plays a role in aligning the central axis of the lampshade and the central axis of the radiator. During the buckling process of the lampshade and the radiator, the circumferential limiting portion plays the role of axial alignment and circumferential alignment at the same time, so that the circumferential limiting portion can accurately fall into the target position of the lampshade, greatly reducing the damage rate of the lampshade; 2) the closed end and the guide surface at least partially overlap in the radial width direction, and when the lampshade slides against the guide surface, it can also slide against the closed end for at least part of the time period. The guide surface and the closed end can work together to completely align the central axes of the radiator and the lampshade. , and at the same time, the radiator and the lampshade are prone to a certain deflection, ensuring that the circumferential limit part accurately falls into the target position; 3) The guiding surface guides the lampshade before the circumferential limit part. The pre-guiding effect allows the radiator and the lampshade to be pre-aligned in the axial direction first, avoiding a large deviation between the two in the axial direction, which is more conducive to the circumferential alignment of the two; 4) The guiding surface ends the guiding effect on the lampshade before the circumferential limit part. The guiding surface can play a longer guiding role than the closed end, ensuring that the central axes of the two are completely aligned, and at the same time ensuring that the axial buckle part can form a more stable axial limit connection with the lampshade to avoid the lampshade from separating from the radiator; 5) The arc transition can not only ensure the effective rotation stop of the lampshade, but also play a certain auxiliary role in the circumferential deviation of the lampshade. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a top view of the radiator provided by the utility model.

[0017] Figure 2 This is a cross-sectional view of the radiator provided by the utility model.

[0018] Figure 3 for Figure 2 A magnified view of the structure in Figure 2.

[0019] Figure 4 A three-dimensional diagram of the radiator provided by the utility model.

[0020] Figure 5 for Figure 4 Enlarged view of the structure at B in the figure.

[0021] Figure 6 The three-dimensional radiator provided by the utility model Figure 2 .

[0022] Figure 7 for Figure 6 Enlarged view of the structure at position C in the figure.

[0023] Figure 8 This is a bottom view of the lampshade provided by the utility model.

[0024] Figure 9 This is a cross-sectional view of the lampshade provided by the utility model.

[0025] Figure 10 A three-dimensional diagram of the lampshade provided by the utility model.

[0026] Figure 11 This is a three-dimensional diagram of the LED lamp provided by the utility model.

[0027] Among them, 1-heat sink, 11-heat sink opening, 2-lamp cover, 21-adapter neck, 22-grip, 221-inclined surface, 3-axial buckle portion, 31-guide surface, 311-starting end of guide surface, 312-end of guide surface, 4-circumferential limiting portion, 41-V-shaped tooth surface, 411-closed end of V-shaped tooth surface, 412-first end, 413-second end, 42-arc transition. DETAILED DESCRIPTION

[0028] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solution in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] As Figures 1-5 shown, an LED lamp radiator has an opening 11 for connecting a lamp cover 2. The opening 11 is formed with an axial snap portion 3 and a circumferential limiting portion 4. The axial snap portion 3 and the circumferential limiting portion 4 are circumferentially spaced along the circumference of the opening 11. Among them, the axial snap portion 3 is used to realize the axial limiting connection between the radiator 1 and the lamp cover 2, and the circumferential limiting portion 4 is used to realize the circumferential anti-rotation cooperation between the radiator 1 and the lamp cover 2.

[0030] As Figure 3 、 Figure 5 shown, the end of the circumferential limiting portion 4 close to the opening 11 forms a V-shaped tooth surface 41. Taking the direction shown in Figure 3 as an example, the opening of the V-shaped tooth surface 41 faces downward, and its upper part has a closed end 411. The closed end 411 has a first end 412 close to the opening 11 and a second end 413 located radially inside the first end 412. The closed end 411 extends obliquely from the first end 412 to the second end 413 along the direction extending into the radiator. In other words, as shown in Figure 2 when the radiator 1 is placed flat, there is a height difference between the first end 412 and the second end 413. Taking the direction shown in Figure 3 as an example, the first end 412 is higher than the second end 413.

[0031] That is to say, while the V-shaped tooth surface 41 has sides that extend obliquely from the closed end 411 to both sides, the closed end 411 itself also forms an inclined structure. When the lamp cover 2 is docked and cooperated with the radiator 1, the lamp cover 2 can slide towards the radiator 1 against the closed end 411. At this time, the closed end 411 plays a role in aligning the central axis of the lamp cover 2 and the central axis of the radiator 1. At the same time, the two inclined sides of the V-shaped tooth surface 41 guide the lamp cover 2 to undergo a certain circumferential deflection. In other words, during the buckling process of the lamp cover 2 and the radiator 1, the circumferential limiting portion 4 simultaneously plays the role of axial alignment and circumferential alignment, enabling the circumferential limiting portion 4 to accurately fall into the target position of the lamp cover 2 without abutting against the lamp cover 2 and causing damage to the lamp cover 2, thereby greatly reducing the damage rate of the lamp cover 2. Of course, in other embodiments, the V-shaped tooth surface 41 can also be a structure such as a C-shaped similar to the V-shaped, and specific limitations are not made.

[0032] In the prior art, the top end of the circumferential limiting portion (illustrated by the Figure 2 shown direction) is higher than the top end of the axial snap portion. That is, when the radiator and the lamp cover are butt - assembled, first, the V - shape at the top of the circumferential limiting portion is used to cause the circumferential deflection of the lamp cover. Then, the situation of excessive axial offset between the lamp cover and the radiator may occur, that is, the distance between the central axis of the lamp cover and the central axis of the radiator is too large, resulting in the two not being directly opposite to each other.

[0033] In the prior art, there is also a case where the top end of the axial snap portion is higher than the top end of the circumferential limiting portion, and the distance between their top ends is relatively large. That is, when the radiator and the lamp cover are butt - assembled, first, the axial snap portion is used to make the lamp cover and the radiator axially tend to be aligned. At this time, due to the excessive circumferential binding force on the lamp cover, the lamp cover is difficult to undergo circumferential deflection, which easily leads to damage to the lamp cover.

[0034] In the present utility model, the circumferential deflection and axial alignment of the lamp cover 2 are adjusted simultaneously, making it easier for the lamp cover 2 to rotate circumferentially so that the lamp cover and the radiator are axially aligned and the circumferential direction falls into the target position.

[0035] As Figure 5 shown, the axial snap portion 3 has a guiding surface 31. The guiding surface 31 has a starting end 311 and an ending end 312. The starting end 311 is close to the opening 11. In other words, the ending end 312 is located radially inside the starting end 311. Here, the radial direction refers to the diameter direction of the radiator 1. The guiding surface 31 extends obliquely from the starting end 311 to the ending end 312 along the direction of extending into the radiator 1. Here, the inside of the radiator 1 refers to the direction of the radiator 1 away from the opening 11. Illustrated by the Figure 4 shown direction, the axial snap portion 3 extends obliquely from top to bottom and from outside to inside.

[0036] The closed end 411 and the guiding surface 31 at least partially overlap in the radial width direction. The overlap in the radial width direction here specifically means that with the center of the radiator 1 as the center of a circle, a circle is drawn through the arc of the ending end 312 of the guiding surface 31, and this circle passes through the circumferential limiting portion 4. Thus, when the lamp cover 2 slides against the guiding surface 31, during the whole process, at least in some time periods, it can also slide against the closed end 411, that is, the lamp cover 2 slides against the guiding surface 31 and the closed end 411 at the same time for some time. At this time, the guiding surface 31 and the closed end 411 can act together to make the central axes of the radiator 1 and the lamp cover 2 completely aligned. At the same time, the radiator 1 and the lamp cover 2 are easy to undergo a certain deflection, ensuring that the circumferential limiting portion 4 accurately falls into the target position and avoiding damage to the lamp cover 2, or rather avoiding damage to the lamp cover 2 and the radiator 1, or rather avoiding damage to the radiator 1.

[0037] In this embodiment, the inclination angle of the guiding surface 31 is the same as that of the closed end 411 of the V-shaped tooth surface 41. Of course, the inclination angles of the two can also be slightly different, but they should be as close as possible to ensure that the axial snap portion 3 and the circumferential limiting portion 4 can jointly guide the lamp cover 2 and ensure that the radiator 1 and the lamp cover 2 are completely axially aligned.

[0038] The starting end 311 of the guiding surface 31 is located radially outside the first end 412 of the circumferential limiting portion 4. That is to say, the guiding surface 31 guides the lamp cover 2 before the circumferential limiting portion 4. This pre-guiding effect enables the radiator 1 and the lamp cover 2 to be pre-aligned axially first, avoiding large axial deviations between the two and being more beneficial to their circumferential alignment.

[0039] The end 312 of the guiding surface 31 is located radially inside the second end 413 of the circumferential limiting portion 4. That is to say, the guiding surface 31 ends guiding the lamp cover 2 before the circumferential limiting portion 4. The guiding surface 31 can guide for a longer time than the closed end 411, ensuring that their central axes are completely aligned, and at the same time ensuring that the axial snap portion 3 can form a more stable axial limiting connection with the lamp cover 2 to prevent the lamp cover 2 from detaching from the radiator 1.

[0040] As Figure 6 、 Figure 7 shown, an arc transition 42 is formed on the side of the circumferential limiting portion 4 facing the center of the radiator. Of course, the arc transition 42 here does not extend through the entire thickness of the circumferential limiting portion 4 protruding from the inner surface of the radiator, and there are still some side walls that are completely perpendicular to the inner surface of the radiator 1. Thus, it can not only ensure effective anti-rotation of the lamp cover 2, but also the arc transition 42 can play a certain auxiliary role in the circumferential offset of the lamp cover 2.

[0041] As Figure 11 shown, an LED lamp includes a lamp cover 2 and a radiator 1 having the above structure. As Figures 8-10 shown, the opening of the lamp cover 2 for connecting the radiator 1 has a transition neck 21. A plurality of teeth 22 are provided at intervals on the outer periphery of the transition neck 21. The teeth 22 have at least three inclined surfaces 221 adjacent in the circumferential direction. In this embodiment, the teeth 22 have three inclined surfaces 221, and two of the inclined surfaces 221 are symmetrically arranged on both sides of the other inclined surface 221. Specifically, the two symmetric inclined surfaces 221 are defined as circumferential inclined surfaces, and the other inclined surface 221 is defined as a radial inclined surface. During assembly, the radial inclined surface can slide against the closed end 411 of the V-shaped tooth surface 41, and the circumferential inclined surface can slide against the two inclined side surfaces of the V-shaped tooth surface 41.

[0042] During the assembly process of the LED lamp, the opening of the lamp cover 2 is placed at the opening 11 of the radiator 1. The radial inclined surfaces of some of the teeth 22 slide along the guiding surface 31, making the central axes of the lamp cover 2 and the radiator 1 as aligned as possible, playing a role of pre-alignment;

[0043] Next, during the sliding contact between the engaging teeth 22 and the guiding surface 31, the radial inclined surfaces of some of the engaging teeth 22 slide against the closed end 411 of the V-shaped tooth surface 41. At this time, the closed end 411 serves to align the central axis of the lamp cover 2 and the central axis of the radiator 1. At the same time, the two inclined side surfaces of the V-shaped tooth surface 41 guide the lamp cover 2 to undergo a certain circumferential deflection through the circumferential inclined surfaces of the engaging teeth 22, so that the circumferential limiting portion 4 can accurately fall into the target position of the lamp cover 2. At this time, since the contact area between the engaging teeth 22 and the V-shaped tooth surface 41 is small, and before a large circumferential binding force is formed between the lamp cover 2 and the radiator 1, the lamp cover 2 is prone to circumferential deflection, enabling the circumferential limiting portion 4 to accurately fall between adjacent engaging teeth 22, thus avoiding damaging the lamp cover 2;

[0044] The lamp cover 2 continues to slide against the axial fastening portion 3 and the circumferential limiting portion 4. The arc transition 42 of the circumferential limiting portion 4 can also assist in guiding the circumferential offset of the lamp cover 2, that is, the engaging teeth 22 of the lamp cover 2 abut against the arc transition 42, making it easier for the circumferential limiting portion 4 to fall between adjacent engaging teeth 22;

[0045] Alternatively, after the lamp cover 2 slides against the circumferential limiting portion 4, the lamp cover 2 continues to slide against the axial fastening portion 3 until the engaging teeth 22 cross over the axial fastening portion 3, causing the portion of the axial fastening portion 3 protruding from the inner surface of the radiator 1 to abut against the surface of the engaging teeth 22 facing the three inclined surfaces, and a firm snap connection is formed between the lamp cover 2 and the radiator 1.

[0046] The above specific embodiments are used to explain and illustrate the present invention, rather than limiting the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims of the present invention fall within the protection scope of the present invention.

Claims

1. An LED lamp heat sink, wherein an axial buckle portion (3) and a circumferential stopper portion (4) are formed at an opening (11) for connecting a lampshade (2), characterized in that: The end of the circumferential limiting portion (4) close to the opening (11) forms a V-shaped tooth surface (41); the closed end (411) of the V-shaped tooth surface (41) has a first end (412) close to the opening (11), and a second end (413) located radially inward of the first end (412); the closed end (411) extends obliquely from the first end (412) to the second end (413) along a direction extending into the heat sink.

2. The LED lamp heat sink according to claim 1, characterized in that: The axial buckle portion (3) has a guide surface (31), the guide surface (31) having a starting end (311) and an end (312), the starting end (311) being close to the opening (11), and the guide surface (31) extending obliquely from the starting end (311) to the end (312) along a direction extending into the heat sink, and the closed end (411) and the guide surface (31) at least partially overlap in the radial width direction.

3. The LED lamp heat sink according to claim 2, characterized in that: The starting end (311) of the guide surface (31) is located radially outside the first end (412) of the circumferential limiting portion (4).

4. The LED lamp heat sink according to claim 2, characterized in that: The inclination angles of the guide surface (31) and the closed end (411) of the V-shaped tooth surface are the same or tend to be the same.

5. The LED lamp heat sink according to claim 2, characterized in that: The end (312) of the guide surface (31) is located radially inside the second end (413) of the circumferential limiting portion (4).

6. The LED lamp heat sink according to claim 1, characterized in that: The circumferential limiting portion (4) forms an arc transition (42) on one side facing the center of the radiator.

7. The LED lamp heat sink according to claim 1, characterized in that: The axial buckle portion (3) and the circumferential limiting portion (4) are distributed at intervals in the circumferential direction.

8. An LED lamp, comprising a heat sink (1) and a lampshade (2), characterized in that: The heat sink (1) forms an axial snap-fit ​​portion (3) and a circumferential limiting portion (4) at an opening (11) connected to the lampshade (2); the end of the circumferential limiting portion (4) close to the opening (11) forms a V-shaped tooth surface (41); a closed end (411) of the V-shaped tooth surface (41) has a first end (412) close to the opening (11), and a second end (413) located radially inward of the first end (412); the closed end (411) extends obliquely from the first end (412) to the second end (413) along a direction extending into the heat sink (1).

9. The LED lamp according to claim 8, characterized in that: The axial buckle portion (3) has a guide surface (31), the guide surface (31) having a starting end (311) and an end (312), the starting end (311) being close to the opening (11), and the guide surface (31) extending obliquely from the starting end (311) to the end (312) along a direction extending into the heat sink, and the closed end (411) and the guide surface (31) at least partially overlap in the radial width direction.

10. The LED lamp according to claim 9, characterized in that: The starting end (311) of the guide surface (31) is located radially outside the first end (412) of the circumferential limiting portion (4); the inclination angles of the guide surface (31) and the closed end (411) of the V-shaped tooth surface are the same or tend to be the same; the end (312) of the guide surface (31) is located radially inside the second end (413) of the circumferential limiting portion (4); the lampshade (2) has a transition neck (21), and a plurality of latch teeth (22) are spaced apart on the outer circumference of the transition neck (21), and the latch teeth (22) have at least three circumferentially adjacent inclined surfaces (221).

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