High-precision keyboard LED lamp lumen test fixture

Abstract

The utility model provides a high-precision keyboard LED lamp lumen test fixture, which comprises a bottom plate, a support plate, an upper cover plate, an optical fiber sleeve assembly and an optical fiber probe, the optical fiber sleeve assembly comprises a hard protective sleeve and an elastic shading sleeve, the upper end of the hard protective sleeve is in sliding connection with a mounting hole, and the lower end of the hard protective sleeve is in sliding connection with the elastic shading sleeve. The elastic shading sleeve comprises a fixed pipe sleeve, a limiting pipe sleeve and a shading telescopic sleeve which are integrally arranged, the fixed pipe sleeve is fixed to the lower end of the hard protective sleeve, the limiting pipe sleeve surrounds the periphery of the hard protective sleeve, the lower end of the limiting pipe sleeve is fixed to the upper end of the fixed pipe sleeve, and the upper end of the limiting pipe sleeve makes contact with the lower end face of the upper cover plate; the upper end of the shading telescopic sleeve is fixed to the lower end of the fixed pipe sleeve, the lower end of the shading telescopic sleeve is an elastic telescopic end, a detection cavity is formed in the shading telescopic sleeve, and the lower end of the optical fiber probe is fixed to the lower side of the hard protective sleeve. And the accuracy of LED lamp lumen detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of keyboard manufacturing, and particularly relates to a high-precision keyboard LED lamp lumen testing fixture. Background Art

[0002] A keyboard conductive film, also known as a metal dome conductive film, is a PET thin sheet containing metal domes, which is used as a switch on circuit boards such as PCBs or FPCs, and plays an important role as a tactile switch between users and instruments. It realizes the conductive function by printing conductive silver paste on the PET thin sheet. Some styles of keyboards will assemble LED lamps on the conductive film, which can play a role in beautifying the appearance and lighting. The lumen of the light is an important parameter for judging the intensity of its illumination. The LED lamps on the keyboard need to undergo lumen testing. During the test, the keyboard conductive film with the LED lamp installed is placed on the testing fixture and placed in a dark room, and the fiber optic probe is used to detect the glowing LED lamp. However, although it is in a dark room, considering that manual operation requires light, it is impossible to achieve complete darkness in the detection environment, and the light in the detection environment will interfere with the lumen detection of the LED lamp, reducing the detection accuracy. Therefore, it is necessary to make a high-precision keyboard LED lamp lumen testing fixture to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a high-precision keyboard LED lamp lumen testing fixture to solve the problems mentioned in the background art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A high-precision keyboard LED lamp lumen testing fixture includes a bottom plate, a support plate, an upper cover plate, a fiber optic sleeve assembly and a fiber optic probe. Two groups of support plates are provided and are respectively fixed on the left and right sides above the bottom plate. The left and right ends of the upper cover plate are respectively fixed on the upper ends of the two groups of support plates. The position of the upper cover plate on the support plate is adjustable in the vertical direction. The fiber optic sleeve assembly includes a rigid protective sleeve and an elastic light-shielding sleeve. An installation hole is vertically provided in the middle of the upper cover plate. The upper end of the rigid protective sleeve is slidably connected to the installation hole. The elastic light-shielding sleeve includes an integrally provided fixed tube sleeve, a limiting tube sleeve and a light-shielding telescopic sleeve. The fixed tube sleeve is fixed at the lower end of the rigid protective sleeve. The limiting tube sleeve surrounds the outer periphery of the rigid protective sleeve. The lower end of the limiting tube sleeve is fixed to the upper end of the fixed tube sleeve. The upper end of the limiting tube sleeve is in contact with the lower end surface of the upper cover plate. The upper end of the light-shielding telescopic sleeve is fixed to the lower end of the fixed tube sleeve. The lower end of the light-shielding telescopic sleeve is an elastic telescopic end. A detection cavity is provided in the light-shielding telescopic sleeve. The lower end of the fiber optic probe is fixed on the lower side of the rigid protective sleeve and corresponds to the upper part of the detection cavity.

[0006] Further description of the utility model: The light-shielding telescopic sleeve comprises a plurality of groups of elastic telescopic rings, and the plurality of groups of elastic telescopic rings are connected end to end along the vertical direction.

[0007] Further description of the utility model: The cross section of the elastic telescopic ring is a groove protruding outward.

[0008] Further description of the utility model: the groove on the elastic telescopic ring is a V-shaped groove.

[0009] Further description of the utility model: the groove on the elastic telescopic ring is an arc groove.

[0010] Further description of the utility model: the elastic light-shielding sleeve is made of rubber material.

[0011] The beneficial effects of the utility model are as follows: in the traditional detection method, since it is impossible to achieve complete lightlessness in the detection environment, the light in the detection environment will interfere with the lumen detection of the LED lamp, reducing the accuracy of the detection. The present design improves the test fixture, places the keyboard conductive film on the bottom plate, pulls the hard protective cover upward, and makes the hard protective cover slide upward. At this time, the limiting tube sleeve is compressed, and as the hard protective cover rises, the light-shielding telescopic cover also rises, and then the conductive film is moved so that the LED lamp on the conductive film corresponds to directly below the light-shielding telescopic cover, and then the hard protective cover is released. Under the elastic action of the limiting tube sleeve and the gravity of the elastic light-shielding cover itself, the light-shielding telescopic cover completely shields the LED lamp, and then the optical fiber probe can be used to detect the LED lamp. At this time, the detection cavity is equivalent to providing a small darkroom for the detection of the LED lamp, which can effectively block external light from entering the detection cavity, reduce light pollution, and improve the accuracy of the LED lamp lumen detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the optical fiber sleeve assembly in the utility model;

[0014] Description of reference numerals:

[0015] 01. Base plate; 02. Support plate; 03. Upper cover plate; 031. Mounting hole; 04. Fiber optic sleeve assembly; 041. Hard protective sleeve; 042. Elastic light-shielding sleeve; 0421. Fixed sleeve; 0422. Limit sleeve; 0423. Light-shielding telescopic sleeve; 04231. Detection cavity; 04232. Elastic telescopic ring; 05. Fiber optic probe. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] As shown Figures 1 to 2 in the figure, a high-precision keyboard LED lamp lumen test fixture includes a bottom plate 01, a support plate 02, an upper cover plate 03, an optical fiber sleeve assembly 04 and an optical fiber probe 05. Two sets of support plates 02 are provided and are respectively fixed on the left and right sides above the bottom plate 01. The left and right ends of the upper cover plate 03 are respectively fixed on the upper ends of the two sets of support plates 02. The position of the upper cover plate 03 on the support plate 02 is adjustable in the vertical direction. The optical fiber sleeve assembly 04 includes a hard protective sleeve 041 and an elastic light-shielding sleeve 042. An installation hole 031 is vertically provided in the middle of the upper cover plate 03. The upper end of the hard protective sleeve 041 is slidably connected to the installation hole 031. The elastic light-shielding sleeve 042 includes an integrally provided fixed tube sleeve 0421, a limit tube sleeve 0422 and a light-shielding telescopic sleeve 0423. The fixed tube sleeve 0421 is fixed at the lower end of the hard protective sleeve 041. The limit tube sleeve 0422 surrounds the outer periphery of the hard protective sleeve 041. The lower end of the limit tube sleeve 0422 is fixed at the upper end of the fixed tube sleeve 0421. The upper end of the limit tube sleeve 0422 is in contact with the lower end surface of the upper cover plate 03. The upper end of the light-shielding telescopic sleeve 0423 is fixed at the lower end of the fixed tube sleeve 0421. The lower end of the light-shielding telescopic sleeve 0423 is an elastic telescopic end. A detection cavity 04231 is provided inside the light-shielding telescopic sleeve 0423. The lower end of the optical fiber probe 05 is fixed on the lower side of the hard protective sleeve 041 and corresponds to the upper part of the detection cavity 04231.

[0018] In the traditional detection method, since it is impossible to achieve complete darkness in the detection environment, the light in the detection environment will interfere with the lumen detection of the LED lamp, reducing the detection accuracy. In this design, the test fixture is improved. The keyboard conductive film is placed on the bottom plate 01. The hard protective sleeve 041 is pulled upward to make the hard protective sleeve 041 slide upward. At this time, the limit tube sleeve 0422 is compressed. As the hard protective sleeve 041 rises, the light-shielding telescopic sleeve 0423 also rises. Then, the conductive film is moved so that the LED lamp on the conductive film is directly below the light-shielding telescopic sleeve 0423. Then, the hard protective sleeve 041 is released. Under the elastic action of the limit tube sleeve 0422 and the gravity of the elastic light-shielding sleeve 042 itself, the light-shielding telescopic sleeve 0423 completely shields the LED lamp. Then, the optical fiber probe 05 can be used to detect the LED lamp. At this time, the detection cavity 04231 is equivalent to providing a small dark room for the detection of the LED lamp, which can effectively block the external light from entering the detection cavity 04231, reduce light damage and improve the accuracy of the LED lamp lumen detection.

[0019] The light-shielding telescopic sleeve 0423 includes multiple groups of elastic telescopic rings 04232, and the multiple groups of elastic telescopic rings 04232 are connected end to end in the vertical direction. When the light-shielding telescopic sleeve 0423 is sleeved downward on the outer periphery of the LED lamp, the elastic telescopic rings 04232 on the light-shielding telescopic sleeve 0423 are compressed in the vertical direction, so as to realize the compression of the light-shielding telescopic sleeve 0423, enabling the light-shielding telescopic sleeve 0423 to be closely attached to the conductive film and shield the LED lamp.

[0020] The cross-section of the elastic telescopic ring 04232 is a groove protruding outward. The groove on the elastic telescopic ring 04232 can be set as a V-shaped groove or an arc-shaped groove. The V-shaped groove and the arc-shaped groove are convenient for processing and manufacturing in terms of structure and are easy to be compressed.

[0021] The elastic light-shielding sleeve 042 is made of rubber material. Since rubber has appropriate elasticity, low price, and most rubber materials are black, it has a better effect on light shielding.

[0022] The above does not impose any limitation on the technical scope of the present utility model. Any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A high-precision keyboard LED lumen testing fixture, characterized in that: It includes a bottom plate, a support plate, an upper cover plate, an optical fiber sleeve assembly and an optical fiber probe. Two groups of support plates are provided and are respectively fixed on the left and right sides above the bottom plate. The left and right ends of the upper cover plate are respectively fixed on the upper ends of the two groups of support plates. The position of the upper cover plate on the support plate is adjustable in the vertical direction. The optical fiber sleeve assembly includes a rigid protective sleeve and an elastic light-shielding sleeve. An installation hole is vertically provided in the middle of the upper cover plate. The upper end of the rigid protective sleeve is slidably connected to the installation hole. The elastic light-shielding sleeve includes an integrally provided fixed tube sleeve, a limiting tube sleeve and a light-shielding telescopic sleeve. The fixed tube sleeve is fixed at the lower end of the rigid protective sleeve. The limiting tube sleeve surrounds the outer periphery of the rigid protective sleeve. The lower end of the limiting tube sleeve is fixed at the upper end of the fixed tube sleeve. The upper end of the limiting tube sleeve contacts the lower end surface of the upper cover plate. The upper end of the light-shielding telescopic sleeve is fixed at the lower end of the fixed tube sleeve. The lower end of the light-shielding telescopic sleeve is an elastic telescopic end. A detection cavity is provided in the light-shielding telescopic sleeve. The lower end of the optical fiber probe is fixed on the lower side of the rigid protective sleeve and corresponds to the upper part of the detection cavity.

2. The high-precision keyboard LED lumen test fixture according to claim 1, wherein: The light-shielding telescopic sleeve includes a plurality of groups of elastic telescopic rings, and the plurality of groups of elastic telescopic rings are connected end to end in the vertical direction.

3. A high-precision keyboard LED lumen test fixture according to claim 2, characterized in that: The cross-section of the elastic telescopic ring is a groove protruding outwards.

4. The high-precision keyboard LED lumen test fixture according to claim 3, characterized in that: The groove on the elastic telescopic ring is a V-shaped groove.

5. The high-precision keyboard LED lumen test fixture according to claim 3, characterized in that: The groove on the elastic telescopic ring is an arc-shaped groove.

6. The high-precision keyboard LED lumen test fixture according to claim 1, wherein: The elastic light-shielding sleeve is made of rubber material.

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