JPH0514941U - Embedded EMC turntable - Google Patents

Abstract

(57) [Summary] [Objective] To provide a turntable for an embedded EMC in which positioning of the turntable is easy and high-frequency grounding is good. [Structure] An embedded type EMC turntable is provided with a conductive base plate in which a circular hole having a mortar-shaped or stepped shape is formed at the peripheral edge, and the peripheral edge is configured to be complementary to the peripheral edge of the circular hole. And a conductive elastic contact member attached to the peripheral edge of either the conductive base or the conductive turntable, the conductive turntable being conductive. It was supposed to be embedded in the circular hole of the sex base.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an embedded EMC turntable.

[0002]

[Prior Art]

 A conventional example of an embedded type EMC turntable will be described with reference to FIG. First, referring to FIG. 1 (a), reference numeral 1 is a conductive base made of, for example, a steel plate that holds horizontal. Reference numeral 2 denotes a conductive turntable made of, for example, a steel plate, which is rotatably supported by a drive shaft 3 fixed to the center thereof. The conductive base 1 and the drive shaft 3 of the turntable 2 are firmly supported from below by a support base (not shown). As shown in the drawing, the turntable 2 is embedded in a circular hole 5 formed in the base 1, and its upper surface is in a horizontal plane common to the upper surface of the base 1 and rotates while maintaining this state. Here, this turntable is for carrying out an automated measurement of EMI, and appropriate rotation drive and control are selected in accordance with various measurements. Reference numeral 4 denotes a conductive elastic contact member made of a grounding spring or a grounding conductive rubber, and a plurality of conductive elastic contact members are provided between the base 1 and the turntable 2 at equal intervals in the circumferential direction. The turntable 2 is grounded at a high frequency through the grounding spring or the grounding conductive rubber 4 and the substrate 1. Next, referring to FIG. 1 (b), in this example, a U-shaped cross-section grounding spring 4'is fixed to the peripheral portion of the circular hole 5 on the lower surface of the base 1, but the spring 4'is not provided. The rest is the same as the example shown in FIG. The load of the turntable 2 is 200 kg to 1000 kg, and the weight of the turntable 2 is about 100 kg to 1000 kg.

[0003]

[Problems to be solved by the device]

 In FIG. 1A, the grounding spring or the grounding conductive rubber 4 is fixed to either one of the base 1 and the turntable 2 and is interposed between them in a compressed state. Needless to say. By the way, since the weight of the turntable 2 is considerably large as described above, the case where the grounding spring or the grounding conductive rubber 4 is fixed to either side of the base 1 and the turntable 2 will be described. However, it is not easy to position the turntable 2 at a predetermined position while keeping them in a compressed state.

In the example shown in FIG. 1B, a U-shaped cross-section grounding spring 4 ′ is fixed to the peripheral portion of the circular hole 5 on the lower surface of the base 1, so that the turntable 2 is connected to the grounding spring 4. All we have to do is to position it from above without any attention to the ', which is easy. However, high frequency grounding cannot be realized satisfactorily due to variations in the product of the U-shaped grounding spring 4 ′ itself, uneven mounting on the lower surface of the base 1, and other reasons.

The present invention is intended to provide an embedded type EMC turntable that solves the above-mentioned drawbacks and problems.

[0006]

[Means for Solving the Problems]

 The turntable for embedded type EMC is provided with a conductive substrate having a circular hole having a mortar-shaped or stepped shape at its peripheral edge, and the peripheral edge is configured to be complementary to the peripheral edge of the circular hole. A conductive turntable is provided, and a conductive elastic contact member is attached to the peripheral edge of either the conductive substrate or the conductive turntable. The conductive turntable is a conductive substrate. It was configured to be embedded in the circular hole of.

[0007]

【Example】

 An embodiment of this invention will be described with reference to FIG. 2 (a) and 2 (b), a conductive base plate 11 made of, for example, a steel plate that holds horizontal is provided with a circular hole 15 having a mortar-shaped or stepped peripheral edge. A conductive turntable 12 having a peripheral portion complementary to the peripheral portion of the circular hole 15 is embedded. The grounding spring or the grounding conductive rubber 14, which is a conductive elastic contact member, is attached to the peripheral edge of either the conductive substrate 11 or the conductive turntable 12. The conductive base 11 and the drive shaft 13 of the turntable 12 are firmly supported from below by a supporting stand (not shown), and the peripheral edge of the circular hole 15 and the conductive turntable 12 which is configured complementarily thereto. Since the gap with the peripheral portion is constant, the shape and dimensions of the grounding spring or the grounding conductive rubber 14 are determined in consideration of this gap.

[0008]

[Effect of the device]

 Here, in order to assemble or remove the turntable 12 with respect to the conductive substrate 11, the grounding spring or the conductive rubber 14 for grounding is installed in the conductive substrate 11 or the conductive turntable 12. It is sufficient to simply move the turntable 12 up and down without attaching any consideration to the grounding spring or the grounding conductive rubber 14 in a state of being attached to one of the peripheral portions.

The gap between the peripheral edge of the circular hole 15 of the conductive base plate 11 and the peripheral edge of the conductive turntable 12 is constant, and in consideration of this gap, a grounding spring or a grounding conductive rubber. Since the shape and dimensions of 14 are determined, the conductive base 11 and the conductive turn 11 through the grounding spring or the conductive rubber 14 for grounding when the turntable 12 is combined with the conductive base 11. The high frequency contact with the table 12 can be kept constant, and this contact is maintained stably.

[Brief description of drawings]

FIG. 1 is a diagram showing a conventional example of a turntable for an embedded EMC.

FIG. 2 is a diagram showing a turntable for an embedded EMC according to the present invention.

[Explanation of symbols]

 11 conductive base 12 conductive turn table 13 drive shaft 14 conductive elastic contact member 15 circular hole

Claims (1)

[Scope of utility model registration request] 1. A conductive turntable having a conductive base plate having a circular hole having a mortar-shaped or stepped shape at the peripheral edge thereof, the peripheral edge being configured to be complementary to the peripheral edge of the circular hole. And a conductive elastic contact member attached to the peripheral edge of either the conductive base or the conductive turntable, wherein the conductive turntable is embedded in a circular hole of the conductive base. A turntable for embedded EMC, which is characterized by being