JPH0443041U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the external appearance of an embodiment of the optical data transmission device of this invention, FIG. 2 is a perspective view showing the attachment positional relationship between the box-shaped case and the front cover in the device shown in FIG. FIG. 3 is a perspective view showing the disassembled state of the front lid and the window plate and reflector of the light emitting/receiving window assembled thereto; FIG. 4 is a perspective view showing the assembled state of each part shown in FIG. 3; FIG. 5 is a cross-sectional view of the front part of the device shown in FIG. 1, and FIGS. 6 and 7 are
FIG. 6 is a perspective view showing the positional relationship of the reflector, the light emitting/receiving window, the light emitting element, and the light receiving element when the front lid is attached in different directions. Fig. 8 is a perspective view of a conventional front-projection/reception type optical data transmission device, Fig. 9 is a block diagram showing a schematic internal configuration of a pair of optical data transmission devices, and Fig. 10 is an example of the use of the optical data transmission device. Perspective view of a certain non-conveyed vehicle and its station, 1st
Figure 1 is a perspective view of a conventional top-projection/reception type optical data transmission device, Figure 12 A, B, and C are diagrams showing different combinations of two pairs of optical data transmission devices, and Figure 13. FIG. 14 is a perspective view showing the mounting structure of the light emitting element and the light receiving element in each of the top light emitting/receiving type and the front light emitting/receiving type. 2... Input/output interface, 3... Modulation circuit, 4... Light emitting element, 5... Light receiving element, 6... Demodulation circuit, 12... Optical data transmission device, 13... Box-shaped case, 13a... ...Top plate, 14...Front lid, 1
4a, 14b... pieces forming the front lid, 15...
Light projection/reception window, 17... Notch, 18... Window plate, 19
, 20...Reflector, 21...Mirror mounting base.

Claims (1)

[Claims for Utility Model Registration] A modulation circuit that converts input data into a modulated signal, a light projecting element that receives the modulated signal and projects modulated light to the other device, a light receiving element that converts the modulated light incident from the other device into an electrical signal, A demodulation circuit that demodulates the light reception output of a light receiving element to extract a data signal, and an input/output interface are assembled into a single thin box-shaped case, and data is exchanged with the other device. The transmission device has a notch formed at the corner where the front and top surfaces of the case intersect, and a front lid that is fitted into the notch and has an L-shaped cross section consisting of two orthogonal symmetrical pieces. , a light emitting/receiving window formed on one piece of the front cover, two reflectors hanging vertically from the other piece while facing the light emitting/receiving window at an angle, and each piece of the front cover. It has a light emitting element and a light receiving element fixed in the case so as to face two reflectors in parallel directions, and the direction of light emitting and receiving can be changed by reversing the mounting direction of the front cover. An optical data transmission device characterized in that it can be switched between a front side and a top side.