In the previous content, we’ve introduced what is a shadowless surgical light and its selection guide. Now, let’s dive deeper into the typical structure of the operating lights.

The structure and composition of the shadowless surgical light are often different according to the product’s intended use, installation, optical principle and light source type. The typical composition of the surgical light mainly includes the light head, the cantilever assembly and the mounting and fixing assembly. Camera system and display are optional.
The typical composition of surgical light is shown in the figure below.

To understand this, please refer to the figure below for TOPLED 8080 series surgical shadowless light, which is also a typical dual light head configuration for operating lights.

surgical light
TOPLED 8080

Nowadays, the dual-head light configuration has become the first choice for most hospital operating rooms: one light head is used to provide the main lighting; the other light head is used as an auxiliary lamp to provide auxiliary lighting to make up for the blind area of the main lamp. In addition, when there is a problem with the main lamp, the auxiliary lamp can also provide backup lighting for the first time.

Then we will take this set of lamps as an example to let you understand the main components of the surgical shadowless light: the light head, the cantilever assembly and the mounting and fixing assembly.

1 Surgical Light Head

The light head is the head of the surgical shadowless light, which directly provides a nearly shadowless lighting environment for the surgical field, or we can understand it as a light source. According to different working principles, most of the light head on the market are designed with different shapes and some other attachable special functions. Therefore, it can be said that the light head is the core part of the surgical shadowless lamp. Such an important topic will be detailed in the subsequent chapters.

Generally speaking, the light head actually contains two parts: the light head and the universal joint. The universal joint is the elbow part connecting the light head and the spring arm. Through the rotation of the two elbow pipes, the light head can be rotated along the three-axis lines (the connection between the light head and the elbow, the connection between the elbow and the other elbow, and the connection between the elbow and the spring arm), so that the light head can be adjusted at any angle in the centre of the lamp, convenient to adjust the lighting of the surgical field.

2 Cantilever Components

The cantilever assembly consists of two parts: the rotating body assembly and the spring arm assembly.

The rotating body assembly is the part connecting the upper mounting fixed assembly and the lower spring arm assembly, including a central axis and a rotating cross arm on the central axis. The above picture is a typical double-headed lamp configuration, the central axis is the vertical rod in the middle of the blue frame in the picture, and the two rotating cross arms are respectively installed at the bottom of the central axis. Through this structural design, the rotating cross arm can be rotated 360° along the axis of the central axis (for example, if there are some cables installed in the rotating cross arm, the rotation angle will be somewhat different). Generally, up to four rotating cross arms can be installed on the central axis, with the end of the light head, display, camera system, etc., so that the surgical shadowless lamp can have multiple configurations. Moreover, the length of the rotating cross arm is not uniformly fixed. For some situations with high space requirements, a custom-length rotating cross arm will provide the best choice.

The spring arm is a connecting rod structure that connects the rotating cross arm and the light head universal joint, which realizes the reciprocating movement as shown in the above figure, and the direction of the two end connecting rods remains unchanged during the movement. At the same time, the internal spring structure ensures that the spring arm can bear a certain range of weight. Therefore, by adjusting the spring arm, you can easily adjust the high and low positions of different light heads.
It is conceivable that the cantilever assembly composed of the rotating body and the spring arm can not only provide the rotation of the horizontal plane of the space but also realize the vertical reciprocating movement of the space. The universal joint on the light head greatly improves the mobility of the surgical shadowless light.

3 Mounting and Fixing Components

The installation and fixing components are generally designed in the shape of a long hanging pipe, and the end is connected with a flange structure. The flange structure is connected with the concealed part hidden in the ceiling space, and the hanging pipe at the other end extends out of the ceiling to connect with the rotating body. The hanging pipe in the red frame as shown in the figure is the installation and fixing component that extends out of the ceiling. A circular cover is installed outside the ceiling to cover the structure in the ceiling

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