JPH02282904A - Tape guide drum device - Google Patents

Abstract

PURPOSE:To attain miniaturization and the reduction of a manufacturing cost by taking conduction to a terminal pin by using a loadable/unloadable connector unit. CONSTITUTION:An elastic conduction member 52 is composed by providing two elastic contact parts on a metallic plate, molding them in cylindrical shape, and enabling the terminal pin 30 to which the winding of a fixed side rotary transformer is connected to be easily inserted. The member 52 is held by drifting on a substrate 64 corresponding to the arrangement of the pin 30. And a connector unit is composed by sticking a flexible substrate 56 on a substrate 54, connecting it to the member 52 with a flow engineering method, etc., and integrating them. The conduction between the member 52 and the terminal pin 30 can be obtained by mounting the connector unit on the bottom part of a lower drum 10. By employing such constitution, a part where soldering is applied can be reduced, and the miniaturization and the reduction in a production cost can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape guide drum device that is effective for use in a magnetic recording and reproducing device for recording and reproducing signals.

BACKGROUND OF THE INVENTION In recent years, as demand for video tape recorders has increased, higher performance and lower cost video tape recorders have been required. For video cameras with built-in walking sticks, there is a demand for smaller, lighter F1 models. Therefore, tape guide drum devices are also required to have multiple heads, be smaller in size, and reduce costs.

An example of the conventional tape guide drum device mentioned above will be described below with reference to the drawings. FIG. 2 shows a sectional view of the structure of a conventional tape guide drum device.

To explain this configuration and operation, Amazumi, lower drum 1
The winding lead 26 of the fixed side cylindrical rotary transformer 2o fixed to the terminal pin 30 is soldered to the terminal pin 30.

The relay connector bin 40 is attached to the entire lower drum 10 of the soldered relay circuit board 60, and the terminal bin 3o is soldered. On the other hand, a relay connector 60 from a head amplifier circuit (not shown) is connected to a relay connector 70 on the lower drum 10 side, and a rotary transformer 8 on the rotating side.
Video signals are sent and received between the video head 90 connected to the head amplifier circuit 0 and the head amplifier circuit.

Problems to be Solved by the Invention However, with the above configuration, with the increase in the number of heads for each recording mode and the number of heads equipped with audio heads, space is required due to the increase in the number of channels of rotary transformers and the increase in the size of relay connectors. Due to the expansion, the number of soldering points for terminal bins increased, which increased the number of production steps, and the soldering process led to an increase in defects, which inevitably led to an increase in production costs.

The present invention addresses the above-mentioned problems and provides a tape guide drum device that realizes space saving through miniaturization and makes it possible to reduce production costs associated with soldering.

Means for Solving All Problems In order to solve the above problem, the tape guide drum device of the present invention includes a cylindrical rotary transformer consisting of a rotating side and a fixed side, and a lead portion of the winding of the fixed side rotary transformer is completely wound, A plurality of rod-shaped metal terminals are arranged near the bottom of the stationary rotary transformer, and a plurality of rod-shaped metal terminals are formed approximately in a cup shape, and a plurality of through holes are provided in the bottom, so that the rod-shaped metal terminals protrude from the bottom through the through holes. and a lower drum in which the fixed side rotary transformer is fixed.

A connection means comprising a plurality of elastic conductive members, a base holding all of the elastic conductive members, and a flexible circuit board electrically connected to the elastic conductive members, fixed to the base, and connected to an external circuit; By fixing the connecting means to the bottom of the lower drum, the elastic conductive member and the rod-shaped metal terminal are brought into electrical contact.

Operation The present invention achieves space saving through miniaturization by the above-described configuration, and can reduce production costs associated with soldering.

Embodiment Hereinafter, a tape guide drum device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross-sectional view of a tape guide drum device according to an embodiment of the present invention.

The elastic conduction member 52 is a thin, springy metal plate with elastic joints at two places, and is formed into a cylindrical shape by applying tin plating, and has a wide entrance so that the terminal bin 30 can be easily inserted. The elastic conductive member 62 is connected to the terminal bin 3
The flexible printed circuit board 66 is driven into and held by the base 64 so as to correspond to the arrangement of the base 64.
The elastic conductive member 6 is pasted on the elastic conductive member 6 using a method such as reflow.
2 has been connected. This integrated unit is hereinafter referred to as a connector unit. The winding lead 26 of the fixed side rotary transformer 20 is wound around the terminal bin 30 and connected by a method such as a dip, and the unwrapped part is higher than the bottom of the lower drum 10. By attaching the connector unit to the bottom of the lower drum 10, electrical continuity is obtained between the elastic contact member 62 and the terminal bin 30, and signals can be exchanged between the head amplifier circuit (not shown) and the video head 9o. Third
The figures are a perspective view and a sectional view showing the shape of the elastic conductive member.

The connector unit is removable and can be used repeatedly. Further, the elastic conductive member may have a scissor-like structure as shown in FIG. Further, the connection between the first elastic groove member and the flexible printed circuit board may be made by bringing the elastic conductive member into direct contact with the copper foil by caulking or other methods, as shown in FIG. Furthermore, the rotary transformer has the advantage that there is almost no need to change the conventional configuration.

Effects of the Invention As described above, the present invention uses a removable connector unit to establish continuity with the terminal bin, so it produces sound effects that reduce size and production costs.
Moreover, the effect becomes larger as the number of terminal bins increases.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a tape guide drum device according to an embodiment of the present invention, FIG. 2 is a sectional view of a conventional tape guide drum device, FIG. This figure is a perspective view showing another embodiment of the elastic contact member, and FIG. 6 is a perspective view showing another embodiment of the connector unit. 10... Lower drum, 26... Winding lead, 30... Terminal bin, 62... Elastic conduction member, 64... L, 66... ...Flexible print board 1st drawing 0 Name of agent Patent attorney Shigetaka Awano and 1 other person/θ
-Lower Doff A 2.5-A line hood 3o-y-Miching Ruhi'n 52-11 tsubo 柁朾澾迾轻轴杆54--1baseJg-7Shi Lub)n b book/handling mouth straw Figure (cL) (b) No.

Claims (1)

[Claims] A cylindrical rotary transformer consisting of a rotating side and a stationary side, a plurality of rod-shaped metal terminals around which the winding leads of the stationary rotary transformer are wound, and a plurality of rod-shaped metal terminals arranged near the bottom of the stationary rotary transformer, and a roughly cup-shaped rotary transformer. a lower drum having a plurality of through holes formed in the bottom thereof, the fixed side rotary transformer being fixed therein so that the rod-shaped metal terminals protrude from the bottom through the through holes; a plurality of elastic conductive members; It has a connecting means consisting of a base holding a conductive member and a flexible circuit board that is conductively connected to the elastic conductive member, fixed to the base and connected to an external circuit, and the connecting means is attached to the bottom of the lower drum. A tape guide drum device characterized in that the elastic conductive member and the rod-shaped metal terminal are brought into contact and electrically conductive by fixing them.