Elevator emergency lighting device
By introducing cleaning and drive components into the elevator emergency lighting system, and using end scrapers and roller brushes to automatically clean dust, the problem of reduced light transmittance of traditional devices is solved, ensuring sufficient lighting in emergencies and simplifying the maintenance process.
Patent Information
- Application Number
- CN202520769962.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-22
AI Technical Summary
Traditional elevator emergency lighting devices are prone to accumulating dust and debris in complex environments, resulting in reduced light transmittance and an inability to provide sufficient lighting brightness in emergency situations.
An elevator emergency lighting device was designed, which includes a cleaning component and a drive component. The drive motor drives the threaded push rod to rotate, the traction slider drives the traction plate to move, and the end scraper and roller brush slide and roll on the surface of the lamp to automatically clean the dust. The dust falls into the collection box through the limit frame and is collected.
It achieves automatic and efficient dust removal, ensuring that the emergency lighting device provides sufficient and bright light in emergency situations, simplifying the maintenance process, and improving maintenance efficiency and device stability.
Smart Images
Figure CN223963059U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of elevator emergency lighting devices, and in particular to an elevator emergency lighting device. Background Technology
[0002] In modern high-rise buildings, elevators have become an essential tool for people's vertical travel. The safety and reliability of elevator operation are of paramount importance, and emergency lighting devices, as a key component of the elevator safety system, provide necessary illumination for trapped passengers in emergencies such as power outages caused by sudden elevator malfunctions. This plays an indispensable role in ensuring the psychological safety of passengers and facilitating successful rescue operations by rescue personnel.
[0003] Traditional elevator emergency lighting systems have revealed numerous problems in practical use. Due to the complex operating environment of elevators, various dust and debris accumulate inside the car. These contaminants easily adhere to the surface of the emergency lighting fixtures, severely affecting their light transmittance over time and causing a gradual decrease in brightness, failing to provide sufficient clear light for passengers in emergencies. Maintenance is also cumbersome, involving cleaning the fixtures and collecting the collected dust, lacking an effective cleaning and collection mechanism, thus reducing maintenance efficiency. Therefore, developing an elevator emergency lighting system with automatic cleaning capabilities, stable installation, and easy maintenance is of significant practical importance. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an elevator emergency lighting device that solves many problems exposed in the actual use of traditional elevator emergency lighting devices. Due to the complex operating environment of elevators, various dust and debris will be generated inside the car. These pollutants are easy to adhere to the surface of the emergency lighting device's lamps. Over time, they will seriously affect the light transmittance of the lamps, causing the lighting brightness to gradually decrease and failing to provide passengers with sufficiently clear light in emergency situations.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an elevator emergency lighting device, including a mounting base plate, the mounting base plate being provided with a connecting mechanism, the connecting mechanism including a cleaning component disposed on the top of the mounting base plate, a driving component disposed on the top of the cleaning component, and connecting components disposed on both sides of the mounting base plate;
[0006] The cleaning assembly includes a top cover fixedly connected to the top of the mounting base plate. A traction plate is slidably connected to a limiting slide opening on the inner wall of the top of the top cover. End scrapers are fixedly connected to the front and rear ends of the traction plate. A rotating shaft is rotatably connected to the bottom of the traction plate. A rotating roller is fixedly connected to the bottom of the rotating shaft. A roller brush is fixedly connected to the outer wall of the rotating roller. A light-transmitting lamp is fixedly installed on the inner wall of the mounting base plate.
[0007] A further improvement is that the drive assembly includes a fixed frame, a drive motor is fixedly installed at the left end of the fixed frame, a threaded push rod is fixedly connected to the output end of the drive motor, and a traction slider is threadedly connected to the outer wall of the threaded push rod.
[0008] A further improvement is that the connecting assembly includes a limiting slider that is slidably connected to the inner wall of the limiting groove opened on both sides of the mounting base. A limiting frame is fixedly connected to the bottom of the limiting slider. A threaded rotating rod is threadedly connected to the inner wall of the outer end of the limiting slider. A stop block is fixedly connected to the outer end of the threaded rotating rod. A collection box is slidably connected to the inner wall of the limiting slot opened on the limiting frame.
[0009] A further improvement is that the traction plate is fixedly connected to the bottom of the traction slider; the traction plate is fixedly connected to the bottom of the traction slider, so the linear movement of the traction slider drives the traction plate to move synchronously; the front and rear ends of the traction plate are fixedly connected to end scrapers, which are symmetrically arranged on the left and right sides of the front and rear ends of the traction plate, and the bottom is slidably connected to the bottom of the inner wall of the light-transmitting lamp.
[0010] A further improvement is that the fixed frame is fixedly installed on the top of the cover, the threaded push rod is rotatably connected to the inner wall of the fixed frame, and the traction slider is slidably connected to the inner wall of the limiting slide opening at the bottom of the fixed frame. Since the traction slider is threadedly connected to the outer wall of the threaded push rod, and the traction slider is slidably connected to the inner wall of the limiting slide opening at the bottom of the fixed frame, the traction slider will move in a straight line along the limiting slide opening when the threaded push rod rotates.
[0011] A further improvement is that a material discharge port is provided on the inner side of the limiting frame, and the material discharge port is located on both sides of the light-transmitting lamp, so that the dust used for cleaning is collected in the inner cavity of the collection box; the limiting frame is fixedly connected to the bottom of the limiting slider, and the position of the mounting base is initially determined by matching the limiting frame with the corresponding installation position in the elevator car; then, by rotating the threaded rotating rod, since the outer end of the threaded rotating rod is fixedly connected to the stop block, and the threaded rotating rod is threaded to the inner wall of the outer end of the limiting slider, rotating the threaded rotating rod can adjust the position of the limiting slider in the limiting groove.
[0012] A further improvement is that the end scrapers are symmetrically arranged on the left and right sides of the front and rear ends of the traction plate, and the bottom of the end scrapers is slidably connected to the bottom of the inner wall of the light-transmitting lamp. The roller brush is equidistantly arranged on the outer wall of the rotating roller, and the bottom of the rotating roller and the roller brush are slidably connected to the bottom of the inner wall of the light-transmitting lamp. During the movement of the traction plate, the rotating roller and the roller brush will roll on the surface of the light-transmitting lamp as the traction plate moves, further cleaning the stubborn dust on the surface of the lamp and improving the cleaning effect.
[0013] By employing the above technical solution, this utility model provides an elevator emergency lighting device, which has at least the following beneficial effects:
[0014] 1. This utility model relates to an elevator emergency lighting device that utilizes a cleaning component and a drive component working in tandem. When the drive motor starts, it rotates the threaded push rod, which in turn drives the traction slider to move the traction plate. At this time, the end scraper and roller brush slide and roll on the surface of the light-transmitting lamp, automatically and efficiently cleaning the dust and debris adhering to the lamp surface. This effectively avoids the problem of reduced light transmittance due to dust accumulation, ensuring that the emergency lighting device can provide sufficient and bright light in emergency situations, greatly improving the reliability of emergency lighting and creating a safer lighting environment for trapped passengers.
[0015] 2. This utility model utilizes a limiting slider that slides within limiting grooves on both sides of the mounting base, combined with the adjustment of the threaded rotating rod, to flexibly adjust the installation position and angle, achieving a stable installation. Simultaneously, the cleaned dust falls into a collection box through the discharge port inside the limiting frame, facilitating centralized cleaning. This design greatly simplifies the maintenance process, shortens maintenance time, improves maintenance efficiency, and reduces maintenance costs, providing strong support for the long-term stable use of the elevator emergency lighting device and enhancing the overall user experience. Attached Figure Description
[0016] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.
[0017] In the attached diagram:
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the inclined structure of this utility model;
[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;
[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B;
[0022] Figure 5 This is a schematic diagram of the inclined tilting structure of this utility model.
[0023] In the diagram: 1. Mounting base plate; 2. Connecting mechanism; 21. Drive assembly; 211. Fixing frame; 212. Drive motor; 213. Threaded push rod; 214. Traction slider; 22. Cleaning assembly; 221. Top cover; 222. Traction plate; 223. End scraper; 224. Rotating shaft; 225. Rotating roller; 226. Roller brush; 227. Light-transmitting lamp; 23. Connecting assembly; 231. Limiting slider; 232. Limiting frame; 233. Threaded rotating rod; 234. Stop block; 235. Collection box. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example
[0025] Traditional elevator emergency lighting devices have revealed numerous problems in practical use. Due to the complex elevator operating environment, various dust and debris accumulate inside the car. These contaminants easily adhere to the surface of the emergency lighting fixtures, severely affecting their light transmittance over time and causing a gradual decrease in brightness. This results in insufficient clear light to provide passengers in emergencies. This embodiment provides an elevator emergency lighting device; please refer to... Figures 1-5 An embodiment provides an elevator emergency lighting device, including a mounting base plate 1. The mounting base plate 1 is provided with a connecting mechanism 2. The connecting mechanism 2 includes a cleaning component 22 disposed on the top of the mounting base plate 1. A driving component 21 is disposed on the top of the cleaning component 22. Connecting components 23 are disposed on both sides of the mounting base plate 1. The cleaning component 22 includes a top cover 221 fixedly connected to the top of the mounting base plate 1. A traction plate 222 is slidably connected to a limiting sliding opening opened on the inner wall of the top of the top cover 221. End scrapers 223 are fixedly connected to the front and rear ends of the traction plate 222. A rotating shaft 224 is rotatably connected to the bottom of the traction plate 222. A rotating roller 225 is fixedly connected to the bottom of the rotating shaft 224. A roller brush 226 is fixedly connected to the outer wall of the rotating roller 225. A light-transmitting lamp 227 is fixedly installed on the inner wall of the mounting base plate 1.
[0026] In this embodiment, the bottom of the traction slider 214 is fixedly connected to the traction plate 222, so the linear movement of the traction slider 214 drives the traction plate 222 to move synchronously; the front and rear ends of the traction plate 222 are fixedly connected to end scrapers 223, which are symmetrically arranged on the left and right sides of the front and rear ends of the traction plate 222, and their bottoms are slidably connected to the bottom of the inner wall of the light-transmitting lamp 227; when the traction plate 222 moves, the end scrapers 223 will slide along the bottom of the inner wall of the light-transmitting lamp 227, scraping up dust and other impurities on the surface of the lamp; A rotating shaft 224 is rotatably connected to the bottom of the guide plate 222, and a rotating roller 225 is fixedly connected to the bottom of the rotating shaft 224. A roller brush 226 is fixedly connected to the outer wall of the rotating roller 225. The roller brush 226 is equidistantly arranged on the outer wall of the rotating roller 225, and the bottom of the rotating roller 225 and the roller brush 226 are slidably connected to the bottom of the inner wall of the light-transmitting lamp 227. During the movement of the guide plate 222, the rotating roller 225 and the roller brush 226 will roll on the surface of the light-transmitting lamp 227 as the guide plate 222 moves, further cleaning the stubborn dust on the surface of the lamp and improving the cleaning effect.
[0027] Furthermore, the traction plate 222 is fixedly connected to the bottom of the traction slider 214; the end scrapers 223 are symmetrically arranged on the left and right sides of the front and rear ends of the traction plate 222, and the bottom of the end scrapers 223 is slidably connected to the bottom of the inner wall of the light-transmitting lamp 227; the roller brush 226 is circumferentially and equidistantly arranged on the outer wall of the rotating roller 225, and the bottom of the rotating roller 225 and the roller brush 226 are slidably connected to the bottom of the inner wall of the light-transmitting lamp 227.
[0028] Furthermore, when the traction plate 222 moves, the end scraper 223 slides along the bottom of the inner wall of the light-transmitting lamp 227, scraping up dust and other impurities on the surface of the lamp. The bottom of the traction plate 222 is rotatably connected to a rotating shaft 224, and the bottom of the rotating shaft 224 is fixedly connected to a rotating roller 225. A roller brush 226 is fixedly connected to the outer wall of the rotating roller 225. The roller brush 226 is circumferentially and equidistantly arranged on the outer wall of the rotating roller 225, and the bottom of the rotating roller 225 and the roller brush 226 are slidably connected to the bottom of the inner wall of the light-transmitting lamp 227. During the movement of the traction plate 222, the rotating roller 225 and the roller brush 226 will roll on the surface of the light-transmitting lamp 227 as the traction plate 222 moves, further cleaning the stubborn dust on the surface of the lamp and improving the cleaning effect. Example
[0029] Based on Embodiment 1, the drive assembly 21 includes a fixed frame 211, a drive motor 212 is fixedly installed at the left end of the fixed frame 211, a threaded push rod 213 is fixedly connected to the output end of the drive motor 212, and a traction slider 214 is threadedly connected to the outer wall of the threaded push rod 213; the connection assembly 23 includes a limiting slider 231 that is slidably connected to the inner wall of the limiting grooves opened on both sides of the mounting base plate 1, a limiting frame 232 is fixedly connected to the bottom of the limiting slider 231, a threaded rotating rod 233 is threadedly connected to the inner wall of the outer end of the limiting slider 231, a stop 234 is fixedly connected to the outer end of the threaded rotating rod 233, and a collection box 235 is slidably connected to the inner wall of the limiting slot opened in the limiting frame 232.
[0030] In this embodiment, when it is necessary to clean the dust on the surface of the light-transmitting lamp 227, the drive assembly 21 starts to work; the drive motor 212 in the drive assembly 21 is fixedly installed on the left end of the fixed frame 211, and the output end of the drive motor 212 is connected to the threaded push rod 213, which is rotatably connected to the inner wall of the fixed frame 211; the fixed frame 211 is fixedly installed on the top of the top cover 221; when the drive motor 212 starts, its output power drives the threaded push rod 213 to rotate; since the outer wall of the threaded push rod 213 is threadedly connected to the traction slider 214, and the traction slider 214 is slidably connected to the inner wall of the limiting slide opening at the bottom of the fixed frame 211, the traction slider 214 will move linearly along the limiting slide opening when the threaded push rod 213 rotates; in terms of installation, the connecting assembly 23 plays a role, and the mounting base plate 1 has limiting slide grooves on both sides, with the limiting slider 231 slidably connected to the inner wall of the limiting slide groove; The bottom of the limiting slider 231 is fixedly connected to the limiting frame 232. By matching the limiting frame 232 with the corresponding installation position inside the elevator car, the position of the mounting base plate 1 is initially determined. Then, by rotating the threaded rod 233, since the outer end of the threaded rod 233 is fixedly connected to the stop 234 and the threaded rod 233 is threaded to the inner wall of the outer end of the limiting slider 231, rotating the threaded rod 233 can adjust the position of the limiting slider 231 in the limiting groove, thereby adjusting the installation angle and position of the mounting base plate 1 to achieve stable installation. In terms of dust collection, the inner side of the limiting frame 232 is provided with a discharge port, which is located on both sides of the light-transmitting lamp 227. The dust cleaned by the end scraper 223 and the roller brush 226 falls into the inner cavity of the collection box 235, which is slidably connected to the inner wall of the limiting groove of the limiting frame 232, through the discharge port, which facilitates subsequent unified cleaning and improves the convenience of maintenance.
[0031] Furthermore, the fixed frame 211 is fixedly installed on the top of the top cover 221, the threaded push rod 213 is rotatably connected to the inner wall of the fixed frame 211, and the traction slider 214 is slidably connected to the inner wall of the limiting slide opening at the bottom of the fixed frame 211; the limiting frame 232 has a material discharge port on the inner side, and the material discharge port is located on both sides of the light-transmitting lamp 227, and the dust used for cleaning is collected in the inner cavity of the collection box 235.
[0032] Furthermore, the drive motor 212 in the drive assembly 21 is fixedly installed on the left end of the fixed frame 211. The output end of the drive motor 212 is connected to a threaded push rod 213, which is rotatably connected to the inner wall of the fixed frame 211. The fixed frame 211 is fixedly installed on the top of the top cover 221. When the drive motor 212 starts, its output power drives the threaded push rod 213 to rotate. Since the outer wall of the threaded push rod 213 is threadedly connected to a traction slider 214, and the traction slider 214 is slidably connected to the inner wall of the limiting slide opening at the bottom of the fixed frame 211, the traction slider 214 will move linearly along the limiting slide opening when the threaded push rod 213 rotates. Regarding installation... The connecting component 23 functions by providing limiting grooves on both sides of the mounting base plate 1, with the limiting slider 231 slidably connected to the inner wall of the limiting groove. The bottom of the limiting slider 231 is fixedly connected to the limiting frame 232. By aligning the limiting frame 232 with the corresponding installation position inside the elevator car, the position of the mounting base plate 1 is initially determined. Then, by rotating the threaded rod 233, since the outer end of the threaded rod 233 is fixedly connected to the stop 234 and the threaded rod 233 is threadedly connected to the inner wall of the outer end of the limiting slider 231, rotating the threaded rod 233 can adjust the position of the limiting slider 231 in the limiting groove, thereby adjusting the installation angle and position of the mounting base plate 1 to achieve stable installation.
[0033] Working principle: When it is necessary to clean the dust on the surface of the light-transmitting lamp 227, the drive assembly 21 starts to work; the drive motor 212 in the drive assembly 21 is fixedly installed on the left end of the fixed frame 211, and the output end of the drive motor 212 is connected to the threaded push rod 213, which is rotatably connected to the inner wall of the fixed frame 211; the fixed frame 211 is fixedly installed on the top of the top cover 221; when the drive motor 212 starts, its output power drives the threaded push rod 213 to rotate; since the outer wall of the threaded push rod 213 is threadedly connected to the traction slider 214, and the traction slider 214 is slidably connected to the inner wall of the limiting slide opening at the bottom of the fixed frame 211, when the threaded push rod 213 rotates, the traction slider 214 will move linearly along the limiting slide opening;
[0034] The bottom of the traction slider 214 is fixedly connected to the traction plate 222, so the linear movement of the traction slider 214 drives the traction plate 222 to move synchronously. The front and rear ends of the traction plate 222 are fixedly connected to the end scrapers 223, which are symmetrically arranged on the left and right sides of the front and rear ends of the traction plate 222, and are slidably connected to the bottom of the inner wall of the light-transmitting lamp 227. When the traction plate 222 moves, the end scrapers 223 will slide along the bottom of the inner wall of the light-transmitting lamp 227 and scrape up dust and other impurities on the surface of the lamp.
[0035] Meanwhile, a rotating shaft 224 is rotatably connected to the bottom of the traction plate 222, and a rotating roller 225 is fixedly connected to the bottom of the rotating shaft 224. A roller brush 226 is fixedly connected to the outer wall of the rotating roller 225. The roller brush 226 is circumferentially and equidistantly arranged on the outer wall of the rotating roller 225, and the bottom of the rotating roller 225 and the roller brush 226 are slidably connected to the bottom of the inner wall of the light-transmitting lamp 227. During the movement of the traction plate 222, the rotating roller 225 and the roller brush 226 will roll on the surface of the light-transmitting lamp 227 as the traction plate 222 moves, further cleaning the stubborn dust on the surface of the lamp and improving the cleaning effect.
[0036] In terms of installation, the connecting component 23 plays a role. Limiting grooves are opened on both sides of the mounting base plate 1, and the limiting slider 231 is slidably connected to the inner wall of the limiting groove. The bottom of the limiting slider 231 is fixedly connected to the limiting frame 232. By matching the limiting frame 232 with the corresponding installation position in the elevator car, the position of the mounting base plate 1 is initially determined. Then, by rotating the threaded rod 233, since the outer end of the threaded rod 233 is fixedly connected to the stop 234, and the threaded rod 233 is threadedly connected to the inner wall of the outer end of the limiting slider 231, rotating the threaded rod 233 can adjust the position of the limiting slider 231 in the limiting groove, thereby adjusting the installation angle and position of the mounting base plate 1 to achieve stable installation.
[0037] In terms of dust collection, a discharge port is provided on the inner side of the limiting frame 232, and the discharge port is located on both sides of the light-transmitting lamp 227; the dust cleaned by the end scraper 223 and the roller brush 226 falls into the inner cavity of the collection box 235, which is slidably connected to the inner wall of the limiting slide of the limiting frame 232, through the discharge port, which facilitates subsequent unified cleaning and improves the convenience of maintenance.
[0038] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An elevator emergency lighting device comprising a mounting base plate (1), characterized in that: The installation base plate (1) is provided with a connecting mechanism (2), the connecting mechanism (2) includes a cleaning assembly (22) arranged on the top of the installation base plate (1), and the top of the cleaning assembly (22) is provided with a driving assembly (21); the two sides of the installation base plate (1) are provided with a connecting assembly (23); The cleaning assembly (22) includes a top cover (221) fixedly connected to the top of the installation base plate (1), a traction plate (222) slidably connected to the inner wall of the top cover (221), end scraping plates (223) fixedly connected to the front and rear ends of the traction plate (222), a rotating shaft (224) rotatably connected to the bottom of the traction plate (222), a rotating roller (225) fixedly connected to the bottom of the rotating shaft (224), a rolling brush (226) fixedly connected to the outer wall of the rotating roller (225), and a light-transmitting lamp (227) fixedly installed on the inner wall of the installation base plate (1).
2. An emergency lighting device for elevators according to claim 1, characterized in that: The driving assembly (21) includes a fixed frame (211), a driving motor (212) fixedly installed on the left end of the fixed frame (211), a threaded push rod (213) fixedly connected to the output end of the driving motor (212), and a traction sliding block (214) threadedly connected to the outer wall of the threaded push rod (213).
3. The elevator emergency lighting device of claim 1, wherein: The connecting assembly (23) includes a limiting sliding block (231) slidably connected to the inner wall of a limiting sliding groove arranged on the two sides of the installation base plate (1), a limiting frame (232) fixedly connected to the bottom of the limiting sliding block (231), a threaded rotating rod (233) threadedly connected to the outer end inner wall of the limiting sliding block (231), a stop block (234) fixedly connected to the outer end of the threaded rotating rod (233), and a collecting box (235) slidably connected to the inner wall of a limiting sliding slot arranged in the limiting frame (232).
4. The elevator emergency lighting device of claim 1, wherein: The traction plate (222) is fixedly connected to the bottom of the traction sliding block (214).
5. The elevator emergency lighting device of claim 2, wherein: The fixed frame (211) is fixedly installed on the top of the top cover (221), the threaded push rod (213) is rotatably connected to the inner wall of the fixed frame (211), and the traction sliding block (214) is slidably connected to the inner wall of a limiting sliding slot arranged in the bottom of the fixed frame (211).
6. An emergency lighting device for elevators as defined in claim 3, characterized in that The limiting frame (232) is provided with a material falling port on the inner side, and the material falling port is arranged on the two sides of the light-transmitting lamp (227), so that the dust cleaned is collected in the inner cavity of the collecting box (235).
7. The elevator emergency lighting device of claim 1, wherein: The end scraping plates (223) are symmetrically arranged on the left and right sides of the front and rear ends of the traction plate (222), and the bottom of the end scraping plate (223) is slidably connected to the bottom of the inner wall of the light-transmitting lamp (227); the rolling brushes (226) are circumferentially and equidistantly arranged on the outer wall of the rotating roller (225); and the bottom of the rotating roller (225) and the rolling brush (226) is slidably connected to the bottom of the inner wall of the light-transmitting lamp (227).