Lampshade of ceiling lamp

Abstract

The utility model relates to a lampshade of a ceiling lamp, which comprises a side wall of a lampshade body and a planar cover top, a protruding handheld part is arranged on the side wall, a first step part is arranged above the handheld part, and a second step part transitioning from the side wall to the planar cover top is arranged above the first step part. A protruding third step part is arranged at the position, close to the second step part, of the planar cover top, and a circular protruding point is arranged on the inner side of the periphery between the third step part and the second step part. And by arranging the third step part, the injection molding feeding point on the side edge can generate resistance during feeding, so that impact textures, generated when the injection speed is too high, on the surface of a plastic part are reduced or eliminated. And the circular convex points are arranged, so that the front pressure generated on a finished product when the injection molding nozzle injects colloid can be reduced, and the pressure relief effect is achieved. According to the new manufacturing process scheme, the feeding port is changed to the side edge, so that a shadow cannot be seen from the front light-emitting surface.

Description

Technical Field

[0001] The utility model relates to the technical field of lamp manufacturing, in particular to a ceiling lamp shade. Background Art

[0002] A ceiling lamp is a lamp installed inside a room. Because the upper part of the lamp is relatively flat and installed close to the roof, it is called a ceiling lamp. It is commonly used in homes, offices, entertainment venues, etc. It is the main lighting equipment in the room. Its light sources include ordinary white bulbs, fluorescent lamps, high-intensity gas discharge lamps, halogen tungsten lamps, etc. The lampshade is one of the main components of the lamp. The structure of the lampshade not only affects the appearance of the lamp but also affects the performance of the lamp.

[0003] The shell material of the existing ceiling lamp shade is usually made of light scattering PC material. The method of adding scattering agent to the lamp shade allows light to pass through and effectively scatters light, converting the line light source into a surface light source. Common indicators that can characterize the transmission characteristics of light include transmittance, haze, refractive index, etc. Among them, transmittance is the percentage of the luminous flux passing through the lamp shade to its incident luminous flux, and is one of the most important performance indicators to characterize the transparency of the resin.

[0004] Usually when making ceiling lampshades, when the resin material enters the mold cavity, since the injection plastic is rushed into the cavity from a smaller inlet gate, the injection plastic will generate acceleration when passing through the inlet gate, resulting in a faster speed into the cavity and excessive impact force, which usually forms an "impact mark" phenomenon at the injection point of the product, affecting the quality of the product. Although the impact mark formed in this way can be weakened by increasing the mold temperature and reducing the injection speed during the production process, it cannot be eradicated, resulting in extremely low yield rate and waste of manpower and material resources. In addition, the injection molding machine feed port is the center point of the lampshade, which will leave a pit at the feed point in the center of the product, which will produce a shadow when it is lit, bringing an unsightly effect. Summary of the invention

[0005] The utility model aims to provide a ceiling lamp shade to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical measures: a ceiling lamp shade, including a side periphery and a plane cover top of a shade body, a protruding hand-holding portion is arranged on the side periphery, a first step portion is arranged above the hand-holding portion, and a second step portion is arranged above the first step portion for transition from the side periphery to the plane cover top, wherein a protruding third step portion is arranged on the plane cover top near the second step portion, and a circular convex point is arranged on the inner side of the circumference between the third step portion and the second step portion.

[0007] Compared with the prior art, the utility model has the advantages that: by setting the third step portion, that is, setting a step between the front and the side of the lampshade body, the function of this step is that the injection feeding point on the side will generate a resistance when feeding, and the benefit of the resistance is to reduce the impact force during injection, thereby reducing or eliminating the impact texture on the surface of the plastic part caused by the injection speed being too fast. A circular convex point is set on the inner side of the circumference between the third step portion and the second step portion. During injection molding, the colloid squeezes in from the feed port directly opposite the circular convex point, which can reduce the front pressure on the finished product when the injection nozzle injects the colloid, and play a pressure relief role. In addition, the new manufacturing process scheme is to change the feed port to the side, so that no shadow can be seen on the front luminous surface.

[0008] As an improvement of the utility model, the circular convex point is located in the middle of the circumference between the third step portion and the second step portion. The purpose of selecting this design is that the circular convex point is directly opposite to the injection molding feed port, which is moved to the middle of the side, so that the pit phenomenon generated by the feed point can minimize the unsightly effect of shadows when emitting light.

[0009] As an improvement of the utility model, the diameter of the circular protrusion is equal to the thickness of the lampshade body. The purpose of selecting this design is: if the diameter of the circular protrusion is too large, the appearance visual effect of the lampshade is not good, and if the diameter of the circular protrusion is too small, it cannot play the role of pressure relief.

[0010] As an improvement of the utility model, the starting point of the third step is at a straight-line distance A from the side of the lampshade body, wherein A is greater than one-tenth of the outer diameter of the lampshade body and less than one-fifth of the outer diameter of the lampshade body. The purpose of selecting this design is that the starting point of the third step must be set within the side range of the entire lampshade body, so that the distance from the feed port is not too far, and it is not easy to produce the "impact mark" phenomenon.

[0011] As an improvement of the utility model, the protrusion height of the third step portion is equal to the thickness of the lampshade body. The purpose of selecting this design is: if the protrusion height of the third step portion is too large, it will affect the appearance of the entire lampshade; if the protrusion height of the third step portion is too small, it will not play the role of blocking the colloid. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0013] In the attached picture:

[0014] Figure 1 The three-dimensional ceiling lamp shade of the utility model Figure 1 .

[0015] Figure 2 The three-dimensional ceiling lamp shade of the utility model Figure 2 .

[0016] Figure 3 It is a schematic diagram of the ceiling lamp shade during injection molding of the utility model.

[0017] Figure 4 It is a cross-sectional schematic diagram of the ceiling lamp shade of the utility model.

[0018] Figure 5 The utility model is described in the prior art injection molding schematic diagram Figure 1 .

[0019] Figure 6 The utility model is described in the prior art injection molding schematic diagram Figure 2 .

[0020] Explanation of the accompanying drawings: 1. Hand-held portion; 2. First step portion; 3. Second step portion; 4. Third step portion; 5. Circular convex dot; 6. Injection nozzle; 7. Injection material flow direction; 8. Pit; 9. Impact mark. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0022] Example 1

[0023] Please refer to Figure 1 -6. A ceiling lamp shade provided in this embodiment includes a side periphery and a plane shade top of the shade body, a protruding hand-held portion 1 is provided on the side periphery, a first step portion 2 is provided above the hand-held portion 1, a second step portion 3 is provided above the first step portion 2 to transition from the side periphery to the plane shade top, wherein a protruding third step portion 4 is provided on the plane shade top near the second step portion 3, and a circular convex point 5 is provided on the inner side of the circumference between the third step portion 4 and the second step portion 3. Among them, Figure 1 and Figure 2 For the same lampshade, two three-dimensional images are shown from the top and bottom for a more intuitive view.

[0024] In the embodiments of the present utility model application, please refer to Figure 4, the circular convex point 5 is arranged at the middle part of the circumference between the third step portion 4 and the second step portion 3. Since the circular convex point 5 is directly opposite to the injection molding feed port, it is moved to the middle part of the side, so that the pit 8 phenomenon generated by the feed point can minimize the unsightly effect of the shadow when emitting light. Furthermore, the diameter of the circular convex point 5 is equal to the thickness of the lampshade body. If the diameter of the circular convex point 5 is too large, the visual effect of the appearance of the lampshade is not good. If the diameter of the circular convex point 5 is too small, it cannot relieve pressure.

[0025] In the embodiment of the utility model application, the straight-line distance between the starting point of the third step portion 4 and the side of the lampshade body is A, where the distance A is one tenth of the outer diameter of the lampshade body. Since the starting point distance of the third step portion 4 must be set within the side range of the entire lampshade body, the distance from the feed port will not be too far, and the "impact mark 9" phenomenon is not easy to occur.

[0026] Furthermore, the protrusion height of the third step portion 4 is equal to the thickness of the lampshade body. If the protrusion height of the third step portion 4 is too large, it will affect the appearance of the entire lampshade, and if the protrusion height of the third step portion 4 is too small, it will not play the role of blocking the colloid.

[0027] Please refer to Figure 5 In the prior art, the feed port of the injection molding machine is the center point of the lampshade, which will leave a pit 8 at the feed point in the center of the product, and a shadow will be produced when the light is emitted, bringing an unsightly effect.

[0028] Please refer to Figure 6 In the prior art, when making ceiling lamp shades, when the injection plastic (colloid) enters the mold cavity, since the injection plastic is rushed into the cavity from a smaller inlet gate, the injection plastic will generate acceleration when passing through the inlet gate, resulting in a faster speed into the cavity and excessive impact force, which usually forms an "impact mark 9" phenomenon at the injection point of the product, affecting the quality of the product. Although the impact mark 9 formed in this way can be weakened by increasing the mold temperature and reducing the inlet speed during the production process, it cannot be eradicated, resulting in an extremely low yield rate and a waste of manpower and material resources.

[0029] In the embodiment of the utility model application, a new manufacturing structure is adopted to change the feed port to the side, so that no shadow can be seen on the front luminous surface. In addition, by setting the third step 4, that is, setting a step between the front and the side of the lampshade body, the role of this step is: the injection feeding point on the side will generate a resistance when feeding. The benefit of the resistance is to reduce the impact force during injection, so that the speed of the injection plastic flowing to 7 becomes smaller, thereby reducing or eliminating the impact texture on the surface of the plastic part caused by the injection speed being too fast. A circular convex point 5 is set on the inner side of the circumference between the third step 4 and the second step 3. When injection molding, the colloid squeezes in from the feed port opposite to the circular convex point 5, which can reduce the pressure on the front of the finished product when the injection nozzle 6 injects the colloid, play a pressure relief role, and better solve the "impact mark 9" phenomenon.

[0030] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A ceiling lamp shade, comprising a side periphery of a shade body and a flat top integrally formed therewith, a protruding hand-held portion (1) being provided on the side periphery, a first step portion (2) being provided above the hand-held portion (1), and a second step portion (3) being provided above the first step portion (2) for transition from the side periphery to the flat top, wherein: A protruding third step portion (4) is arranged on the top of the plane cover near the second step portion (3), and a circular convex point (5) is arranged on the inner side of the circumference between the third step portion (4) and the second step portion (3).

2. The ceiling lamp shade according to claim 1, characterized in that: The circular convex point (5) is arranged at the middle part of the circumference between the third step portion (4) and the second step portion (3).

3. The ceiling lamp shade according to claim 1, characterized in that: The diameter of the circular convex point (5) is equal to the thickness of the lampshade body.

4. The ceiling lamp shade according to claim 1, characterized in that: The starting point of the third step (4) is at a straight-line distance A from the side periphery of the lampshade body, wherein A is greater than one-tenth of the outer diameter of the lampshade body and less than one-fifth of the outer diameter of the lampshade body.

5. The ceiling lamp shade according to claim 1, characterized in that: The protruding height of the third step portion (4) is equal to the thickness of the lampshade body.

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