JPH058624Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the outer casing structure of a CRT, and more particularly to the outer casing structure of a CRT for an indoor base unit of a television communication device.

[Problems to be solved by conventional technology and inventions] Conventionally, an entrance handset equipped with a television camera, a call/paging circuit, and a light emitting element for lighting, a monitor section,
2. Description of the Related Art A video communication device is known that includes an indoor base unit provided with a communication unit and a power supply means. When a visitor presses the call button, the call/call circuit of the entrance handset and the talking part of the indoor main unit are connected, and the control circuit installed in the monitor of the indoor main unit detects the call.
This output activates the TV monitor and
A constant current for camera power is supplied from the constant current circuit to the television camera of the entrance slave unit via the video signal cable.

Furthermore, current is supplied from the power source by the control circuit to the illumination circuit of the entrance slave unit, and an infrared light emitting element is generated to illuminate the visitor.
Since the television camera of the entrance cordless unit has a built-in light-receiving element such as a CCD that has excellent sensitivity in the infrared region, an infrared light-emitting diode is used as the light-emitting element of the lighting circuit. The image received by the light receiving element is then displayed on a CRT (cathode ray tube) of a television monitor. As shown in the perspective view of FIG. 2, such a CRT is built into an indoor base unit, and the CRT 4 is positioned and fixed by left and right claws 2 and a lower claw 3 provided on the bottom 1 of the outer casing. These left and right claws 2 and lower claw 3 are flexible and have large tolerances because they are made of glass.
It is designed to absorb the tolerances of CRT4.
Then, the lid 5 of the outer casing is fitted to form an indoor base unit of the television communication device.

However, in order to absorb tolerances, these flexible claws made of plastic or rubber are formed at positions that can support CRTs with the maximum tolerance, which creates gaps between the claws and the CRT, making positioning difficult. The walls of the claws are made thin to provide flexibility, making them heavy and resistant to external shocks.
It had drawbacks such as not being able to support the CRT and damaging both the claws.

This invention was made to eliminate the above-mentioned drawbacks, and it has large tolerances and is heavy.
It is an object of the present invention to provide an outer casing structure having a robust fixing member capable of accurately positioning a CRT and supporting it reliably against external impact.

[Means for Solving the Problems] The CRT outer casing structure of the present invention has a CRT built in the outer casing consisting of a bottom plate and a lid fitted to the bottom plate, and the bottom plate has a minimum tolerance. A plurality of flexible claws corresponding to the outer shape of the CRT having a maximum tolerance and a plurality of rigid claws corresponding to the outer shape of the CRT having a maximum tolerance are provided, and the other is provided on the lid.

[Function] By providing flexible claws on the bottom or lid of the outer casing at the position of the CRT with the minimum tolerance, the fixing member of the present invention is flexible and will not be distorted even when fixing the CRT with the maximum tolerance. It can be fixed and all CRTs are accurately positioned, and a rigid claw is provided on the other side of the outer casing at the position of the CRT with the maximum tolerance to absorb the load applied by the movement of the CRT due to impact. This prevents the CRT and flexible claws from being damaged.

[Embodiment] A preferred embodiment in which the CRT outer casing structure of the present invention is applied to an indoor base unit of a television communication device will be described with reference to the drawings.

FIG. 1 is a front view of the indoor base unit of the television communication device with the outer casing lid removed.

The bottom plate 10 of the outer casing is a CRT4 with minimum tolerance.
A plurality of flexible pawls 6 are provided at positions corresponding to the outer shape of 0. The flexible pawl 6 is made of plastic or rubber, and has a thin wall thickness so as to have flexibility. Therefore, the CRT 40 with the minimum tolerance can be positioned without any gaps, and the CRT 40 with the maximum tolerance can be positioned without gaps. , the flexible claw 6 is distorted and fixed in position. Therefore, even if the CRT has small tolerances, accurate positioning can be achieved without creating a gap between the CRT and the claw.

On the other hand, the lid 50 of the outer casing has a maximum tolerance.
A plurality of rigid claws 7 are provided at positions corresponding to the outer shape of the CRT 40. The strength of the rigid claw 7 is determined by the degree of impact and the strength of the CRT 40, and may be made of plastic or rubber, and the wall thickness is thick so that it will not be distorted even when the CRT 40 is attached. do not have. Even if the CRT40 receives an external shock, the range it can move is within the maximum tolerance, for example, about 2mm, and it is a heavy object.
Most of the load on the CRT 40 is applied to the rigid claw 7, and the force that the flexible claw 6 receives is the load applied to the maximum tolerance distance, so that the flexible claw 6 will not be destroyed.

The indoor main unit of the television communication device has main functional parts such as a talking part (not shown) and an operating circuit such as a power supply means inside the outer casing, and the lid 50 is fitted to the bottom plate 10.

In the above embodiment, a flexible claw was provided on the bottom of the outer casing, and a rigid claw was provided on the lid of the outer casing, but in other embodiments, a rigid claw was provided on the bottom of the outer casing, and the outer casing was provided with a flexible claw in case of a shock. A flexible claw may be provided on the lid of the casing for positioning and fixing. Furthermore, it goes without saying that the present invention is not limited to television communication devices, but can be suitably applied to commonly known devices such as portable televisions equipped with a CRT.

[Effects of the invention] According to the CRT outer casing structure of this invention, even a CRT made of glass with large tolerances can be positioned and fixed with high precision, and the CRT can be securely fixed even when subjected to external impact. This makes it possible to easily and reliably prevent damage to the CRT and outer casing, and is very economical.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the CRT outer casing structure of the present invention, and FIG. 2 is a perspective view of a conventional example. 6... Flexible claw, 7... Rigid claw, 10... Bottom of outer casing, 50... Lid of outer casing, 40... CRT.

Claims (1)

[Scope of utility model registration request] In a CRT outer casing structure in which a CRT is built in an outer casing consisting of a bottom plate and a lid fitted to the bottom plate,
Either one of a plurality of flexible claws corresponding to the outer shape of the CRT having a minimum tolerance and a plurality of rigid claws corresponding to the outer shape of the CRT having a maximum tolerance is provided on the bottom plate, and the other is provided on the lid. The CRT outer casing structure is characterized by: