FIELD
[0001] The present disclosure relates to the field of lamp technologies, and more particularly relates to a lamp heat-sinking cup and a lamp.
BACKGROUND
[0002] Fig. 1 shows a conventional heat-sinking cup 100. During a washing process, an external force would cause a plurality of heat-sinking cups to be nested together. As the heat-sinking cup 100 is of a conical structure, constant compression by the external force would cause a heat-sinking cup 100 ("rear heat-sinking cup") to be caught into another heat-sinking cup 100 ("front heat-sinking cup") in front thereof, and meanwhile, the rear heat-sinking cup 100 would be caught more and more tightly in the front heat-sinking cup 100, such that the interfacing portions of the two heat-sinking cups 100 as well as the interstice area 200 formed between the interfacing portions cannot be washed clean; besides, greasy dirt would reside on the inner wall of the front heat-sinking cup and the outer wall of the rear heat-sinking cup. Additionally, because the front and rear heat-sinking cups are mutually caught tightly, water is always retained in the interstice area.
[0003] Further, because the heat-sinking cups are caught tightly with each other, automatic charging in the subsequent injection-molding procedure cannot be performed normally; while manual charging and then manual separating of the heat-sinking cups is not only troublesome, but also time-consuming and laborious, lowering the production capacity. Moreover, the greasy dirt residuals on the surface of the heat-sinking cup would affect the joining strength between the heat-sinking

cup and its exterior plastic layer; additionally, the greasy dirt residues on the surface of the heat-sinking cup would be flushed by the plastics to the exterior surface of the product during the injection-molding process, which affects product appearance and product quality.
SUMMARY
[0004] A technical problem to be solved by the present disclosure is to provide a lamp heat-sinking cup and a lamp, which may prevent heat-sinking cups from tightly catching each other when being nested.
[0005] To solve the above technical problem, the present disclosure adopts the following technical solution: a lamp heat-sinking cup, comprising a small opening portion, a large opening portion, and a conical portion which connects the large opening portion and the small opening portion; wherein a cup nesting step is provided on the small opening portion or the large opening portion, such that when two heat-sinking cups are nested, fitting of the cup nesting steps enables formation of an interstice-fitting between those portions other than the cup nesting step.
[0006] Preferably, the cup nesting step is provided on the large opening portion, wherein the large opening portion comprises a cylindrical section, one end of the cylindrical section joining the conical portion is provided with a first step, and the other end of the cylindrical section is provided with a second step, such that when two heat-sinking cups are nested, the second step of the inner heat-sinking cup is fitted with the first step of the outer heat-sinking cup.
[0007] Preferably, the cup nesting step is provided on the small opening portion,

wherein the small opening portion comprises a cylindrical section, one end of the cylindrical section joining the conical portion is provided with a first step, and the other end of the cylindrical section is provided with a second step, such that when two heat-sinking cups are nested, the second step of the inner heat-sinking cup is fitted with the first step of the outer heat-sinking cup.
[0008] Preferably, the first step and the second step have a tilt angle.
[0009] Preferably, the second step has an arc transition structure.
[0010] Preferably, a head end of the small opening portion is provided with an arc transition section.
[0011] Preferably, the arc transition section is provided along its perimeter with a raised ridge arranged continuously.
[0012] Preferably, the raised ridge has a height of 0.15-0.25mm.
[0013] Preferably, the heat-sinking cup is an aluminum cup.
[0014] The present disclosure further provides a lamp, comprising the heat-sinking cup described above.
[0015] By arranging a cup nesting step at the cup nesting contact points of two heat-sinking cups, when the rear heat-sinking cup is nested into the current (front) heat-sinking cup, presence of the cup nesting steps plays a role of supporting the front heat-sinking cup, thereby preventing the rear heat-sinking cup from being constantly squeezed and caught into the inner cavity of the front heat-sinking cup.
[0016] The specific technical solutions and their beneficial effects of the present

disclosure will be described in detail through the preferred embodiments in conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Hereinafter, the present disclosure will be illustrated in further detail through preferred embodiments with reference to the accompanying drawings.
[0018] Fig. 1 is a schematic diagram of a conventional heat-sinking cup in a nested state;
[0019] Fig. 2 is a structural schematic diagram of a lamp heat-sinking structure in the first embodiment of the present disclosure;
[0020] Fig. 3 is a first enlarged view of part A in Fig. 2;
[0021] Fig. 4 is a second enlarged view of part A in Fig. 2;
[0022] Fig. 5 is an enlarged view of part B in Fig. 2;
[0023] Fig. 6 is an enlarged view of part C in Fig. 2;
[0024] Fig. 7 is a schematic diagram of the heat-sinking cup of the first embodiment in a nested state;
[0025] Fig. 8 is an enlarged view of part D in Fig. 7;
[0026] Fig. 9 is a structural schematic diagram of a lamp heat-sinking structure in a second embodiment of the present disclosure;
[0027] Fig. 10 is an enlarged view of part B in Fig. 2;
[0028] Fig. 11 is an enlarged view of part C in Fig. 2;

[0029] Fig. 12 is a schematic diagram of the heat-sinking cup of the second embodiment in a nested state; and
[0030] Fig. 13 is an enlarged view of part D in Fig. 12.
DETAILED DESCRIPTION OF EMBODIMENTS
[0031] Hereinafter, the technical solution of the present disclosure will be described in a clear and comprehensive manner with reference to the preferred embodiments in conjunction with accompanying drawings; it is apparent that the embodiments described here are part of the embodiments of the present disclosure, not all of them. The depictions on at least one exemplary embodiment below are only illustrative, and in no way intended to limit the present disclosure or application or use thereof. All other embodiments obtained by those skilled in the art without exercise of inventive work based on the examples in the embodiments all fall within the protection scope of the present disclosure.
[0032] Those skilled in the art may understand that, without conflicts, the embodiments and the features in the embodiments of the present disclosure may be combined with each other.
[0033] The terms used in the embodiments of the present disclosure are only for the purpose of describing a preferred embodiment, rather than limiting the present disclosure. For example, the oriental or positional relationships indicated by the expressions like "inner" and "outer" are only termed based on the drawings, which are intended only for facilitating or simplifying description of the present disclosure, not for indicating or implying that the devices/elements have to possess

those specific orientations or have to be configured and operated with those specific orientations; therefore, they should not be understood as limitations to the present disclosure.
[0034] Besides, the terms "first" and "second" are only used for description purposes, which shall not be understood as indicating or implying a relative importance or implicitly indicating the number of technical features as indicated. Therefore, the features limited by "first" and "second" may explicitly or implicitly include one or more of such features.
[0035] Embodiment 1
[0036] As shown in Fig. 2, a lamp heat-sinking cup 100 comprises a small opening portion 11, a large opening 13, and a conical portion 12 connecting the small opening portion 11 and the large opening portion 13, wherein a cup nesting step is provided on the small opening portion 11 or the large opening portion 13.
[0037] As shown in Fig. 1, when two heat-sinking cups 100 are nested, there generally exist two contact points, i.e., two corresponding positions respectively on the small opening portion 11 and the large opening portion 13, and a cup nesting step may be formed at either one of the two contact points.
[0038] In this embodiment, as shown in Figs. 2, 5 and 6, the cup nesting step is provided on the large opening portion 13, wherein the large opening portion 13 comprises a cylindrical section, one end of the cylindrical section joining the conical portion is provided with a first step 101, and the other end of the cylindrical section is provided with a second step 102. The cylindrical section here may also

have a certain taper.
[0039] As shown in Fig. 7, when two heat-sinking cups 100 are nested, the second step 102 on the inner heat-sinking cup is fitted with the first step 101 on the outer heat-sinking cup. In this way, through fitting of the cup nesting steps on the two heat-sinking cups 100, an interstice-fitting may be formed between those portions other than the cup nesting steps, thereby preventing the heat-sinking cups from tightly mutual catching when being nested. Here, the interface-fitting means that the interstice is greater than or equal to 0, without forming a tight catch-fitting.
[0040] The heat-sinking cup is generally made of aluminum, offering a good heat sinking property, as in the prior art. As the heat sinking property of current heat-sinking cups improves constantly, the wall thickness of the heat-sinking cups becomes thinner and thinner, such that the rigidity of the heat sinking cups also decreases correspondingly; in particular, the small opening portion of the heat-sinking cups is always squeezed to be deformed, which affects the yield rate of the products.
[0041] Therefore, to enhance the structural strength of the small opening of the heat-sinking cup, a head end of the small opening portion 11 is provided along its perimeter with an arc transition section, and a raised ridge 11 may be continuously arranged along the perimeter of the arc transition section, as shown in Fig. 3. In this way, the stress on the small opening portion 11 is dispersed, greatly enhancing the structural strength of the small opening portion 11 of the heat-sinking cup, avoiding deformation due to being squeezed, and improving the yield rate of products.

[0042] Preferably, the raised ridge has a height of 0.15-0.25mm. Atoo high or too low raised edge will affect the structural strength.
[0043] As shown in Fig. 3, the raised ridge 111 is raised towards the inner side of the heat-sinking cup. As shown in Fig. 4, the raised ridge 111 is raised towards the outer side of the heat-sinking cup.
[0044] Embodiment 2
[0045] With reference to Figs. 9 to 11, different from Embodiment 1, the cup nesting step is provided at the small opening portion 11, wherein the small opening portion 11 comprises a cylindrical section, the end of the cylindrical section joining the conical portion is provided with a first step 101, and the other end of the cylindrical section is provided with a second step 102. The cylindrical section here may also have a certain taper.
[0046] As shown in Figs. 12 and 13, when two heat-sinking cups 100 are nested, the second step 102 at the inner heat-sinking cup is fitted with the first step 101 at the outer heat-sinking cup.
[0047] Further, as shown in Fig. 10 and Fig. 11, the first step 101 and the second step 102 are not in a right-angle shape, but have a tilt angle; besides, the second step 102 has an arc transition structure to prevent sudden thickening of the wall thickness of the plastic upon injection-molding due to presence of the step; the sudden thickening would leave a shrinkage mark on the outer surface of the heat-sinking cup, affecting product appearance and product quality.
[0048] Embodiment 3

[0049] A lamp comprises the heat-sinking cup described above. A plastic-coated layer is usually required to envelop the outer surface of the heat-sinking cup of the lamp.
[0050] Those skilled in the art may understand that the lamp may be a ball-bulb or similar lamp, and the lighting source may be an LED light source.
[0051] What have been described above are only preferred embodiments of the present disclosure; however, the protection scope of the present disclosure is not limited thereto. A person skilled in the art should understand that the present disclosure includes, but not limited to the contents described in the drawings and the preferred embodiments. Any modifications without departing from the functions and structural principles of the present disclosure will be included within the scope of the claims.

WE CLAIM

1.A lamp heat-sinking cup, comprising a small opening portion, a large opening portion, and a conical portion which connects the large opening portion and the small opening portion; wherein a cup nesting step is provided on the small opening portion or the large opening portion, such that when two heat-sinking cups are nested, fitting of the cup nesting steps enables formation of an interstice-fitting between those portions other than the cup nesting step.
2. The lamp heat-sinking cup as claimed in claim 1, wherein the cup nesting step is provided on the large opening portion, wherein the large opening portion comprises a cylindrical section, one end of the cylindrical section joining the conical portion is provided with a first step, and the other end of the cylindrical section is provided with a second step, such that when two heat-sinking cups are nested, the second step of the inner heat-sinking cup is fitted with the first step of the outer heat-sinking cup.
3. The lamp heat-sinking cup as claimed in claim 1, wherein the cup nesting step is provided on the small opening portion, wherein the small opening portion comprises a cylindrical section, one end of the cylindrical section joining the conical portion is provided with a first step, and the other end of the cylindrical section is provided with a second step, such that when two heat-sinking cups are nested, the second step of the inner heat-sinking cup is fitted with the first step of the outer heat-sinking cup.

4. The lamp heat-sinking cup as claimed in claim 3, wherein the first step and the second step have a tilt angle.
5. The lamp heat-sinking cup as claimed in claim 4, wherein the second step has an arc transition structure.
6. The lamp heat-sinking cup as claimed in any one of claims 1-5, wherein a head end of the small opening portion is provided with an arc transition section.
7. The lamp heat-sinking cup as claimed in claim 6, wherein the arc transition section is provided along its perimeter with a raised ridge arranged continuously.
8. The lamp heat-sinking cup as claimed in claim 7, wherein the raised ridge has a height of 0.15~0.25mm.
9. The lamp heat-sinking cup as claimed in any one of claims 1-5, wherein the heat-sinking cup is an aluminum cup.
10. A lamp, comprising the heat-sinking cup as claimed in any one of claims 1 to 9.