JPH0229539Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a brake device for an electrical device suitable for use in a reel stand of a tape recorder, a video tape recorder, etc.

<Prior Art> The brake devices of the supply reel stand and take-up reel stand of a video tape recorder have several types of braking force, i.e., corresponding to operating conditions such as regenerative braking, fast-forward braking, reverse regenerative braking, etc. Brake condition is required. For this reason, in the past, brake levers were provided for each type, and a plurality of brake operating means were provided to operate these levers, but this mechanism had the disadvantage of being complicated and expensive.

<Purpose> The present invention has been made to eliminate the above-mentioned drawbacks of the conventional brake system, and is to interlock a first brake body and a second brake body through a first moving piece and a second moving piece formed respectively. Accordingly, the present invention aims to provide a braking device that can achieve a plurality of braking states by rotating only the first brake body or the second brake body, and that is simple in structure and inexpensive.

<Embodiment> Hereinafter, an embodiment in which the present invention is applied to a reel stand of a video tape recorder will be explained based on the drawings. A first brake body D1 having an interlocking piece C1 is rotatably provided around the first axis E1, and is second interlocked with a second brake piece B2 and an auxiliary brake piece F that can be pressed against and separated from the second rotating body A2. a second brake body D having a piece C2;
2 is rotatably provided around a second axis E2, and the first brake body D1 and the second brake body D2
A spring holding device G that elastically holds the position of is provided, and the spring holding device G, the first moving piece C1, and the second moving piece C2 are connected to the first moving piece C1 (or the second moving piece C2). The first brake piece B1, the second brake piece B2, and the auxiliary brake piece F are linked to each other so as to be switched between a press-contact state and a separated state by the rotational operation.

In this embodiment, the first rotating body A1 is a supply reel stand, and the second rotating body A2 is a take-up reel stand. The first shaft E1 and the second shaft E2 are supported by a base, and a spring engagement piece H1 is formed on the first brake body D1, and the first brake body D1 is T-shaped in plan view. ing. Further, the second brake body D2 includes the second brake piece B2, the second interlocking piece C2, and the spring engaging piece H2, as shown in FIG.
The main body 2 is T-shaped in plan view and is composed of a small-diameter cylinder 1 at the center, a linking piece 3 that links with the auxiliary brake piece F, the second linking piece C2, and a large-diameter cylinder 4 that is fitted onto the outside of the small-diameter cylinder 1. It is composed of an auxiliary body 5 which is dogleg-shaped in plan view. Further, as shown in FIG. 1, the spring holding device G includes a torsion spring 6 that urges the second interlocking piece C2 and the interlocking piece 3 in a direction in which they are brought into pressure contact with each other.
and a tension spring 7 stretched between the spring engaging piece H1 of the first brake body D1 and the spring engaging piece H2 of the second brake body D2. Although the brake operating device of the first brake body D1 is not shown, it is composed of, for example, a reel stand rotation drive motor and its interlocking mechanism.

Next, the action will be explained. FIG. 1 shows a braking state during a fast-forwarding operation or a rewinding operation, in which the first brake body D1 is biased counterclockwise by the brake operating device, and the first brake piece B1 is biased against the first rotating body A1.
is in pressure contact, and the second brake piece B2 is also in pressure contact with the second rotating body A2 by the tension spring 7. Further, FIG. 2 shows an unloading state, in which the first brake body D1 is rotated by a predetermined amount in the clockwise direction X from the state shown in FIG. 1 by the brake operating device, and the first brake piece B1 is in a separated state. ,
Since the first moving piece C1 is not in contact with the second moving piece C2, the second brake piece B2 is in a pressed state,
Further, the auxiliary brake pieces are in a separated state. FIG. 3 shows operating states such as playback, recording, fast forwarding, etc., in which the first brake body D1 is further rotated in the clockwise direction X from the state shown in FIG.
2 come into contact with each other, and then the second brake piece B2 and the auxiliary brake piece F rotate slightly in the counterclockwise direction Y, and the first brake piece B1, the second brake piece B2, and the auxiliary brake piece F are all separated. ing. FIG. 4 shows a braking state during reverse regeneration, etc. When the first brake body D1 is further rotated from the state shown in FIG. 3, the first moving piece C1 pushes the second moving piece C2 and pushes the second brake piece B2. As it rotates, the auxiliary brake piece F comes into pressure contact and brakes the second rotating body A2 with a slightly weaker force than the second brake piece B2. At this time, the second brake piece B2 rotates and the second interlocking piece C2 of the main body 2 is separated from the interlocking piece 3 of the auxiliary body 5, so that all the force of the torsion spring 6 is transferred to the auxiliary brake piece F. Acts as a pressure contact force.

As mentioned above, by rotating the first brake body D1, that is, the first moving piece C1 in four stages,
In a state where the main braking force is acting on both the first rotating body A1 and the second rotating body A2 (Fig. 1), the braking force is not acting on the first rotating body A1, and the second rotating body A
2 is in a state where the main brake force is acting (second
), a state in which no braking force is applied to both the first rotating body A1 and the second rotating body A2 (Fig. 3), a state where no braking force is applied to the first rotating body A1, and the second rotating body A2 A state in which auxiliary braking force is applied to the vehicle can be realized (Fig. 4).

In the above embodiment, the first brake body D1, that is, the first moving piece C1, is configured to be rotated in four stages, but in the present invention, the second brake body D2, that is, the second moving piece C1 is rotated in four stages. It goes without saying that the piece C2 may be configured to be rotated in four stages.

<Effects> As is clear from the above description, the present invention provides a first brake body that has a first brake piece and a first moving piece that can be pressed against and separated from the first rotating body, and is rotatable around the first axis. A second brake body is provided rotatably around a second shaft and is capable of being pressed against and separated from the second rotating body, and the second brake body includes a main body having a second brake piece and a linking piece. , an auxiliary body having an auxiliary brake piece and a second interlocking piece that can be pressed against and separated from the second rotating body and elastically connected to the connecting piece; A spring holding device that elastically holds the position is provided, and the spring holding device, the first moving piece, and the second moving piece are connected to each other by rotating the first moving piece or the second moving piece. The first brake piece, the second brake piece, and the auxiliary brake piece are linked to each other so as to be switched between a pressed state and a separated state.

Therefore, according to the present invention, by interlocking the first brake body and the second brake body through the respectively formed first and second interlocking pieces,
A plurality of braking states can be realized by operating only the first brake body or the second brake body, and there is an excellent effect of providing a brake device having a simple structure and low cost.

[Brief explanation of drawings]

1 to 4 are plan views showing different braking conditions in the embodiment of the present invention, and FIG. 5 is an exploded perspective view of the second brake body. A1: first rotating body, A2: second rotating body, B1:
First brake piece, B2: Second brake piece, C1:
First moving piece, C2: Second interlocking piece, D1: First brake body, D2: Second brake body, F: Auxiliary brake piece, G: Spring holding device, 2: Main body, 3: Interlocking piece, 5: Auxiliary body.

Claims (1)

[Scope of utility model registration request] A first brake body D1 having a first brake piece B1 and a first moving piece C1 that can be pressed against and separated from the first rotating body A1 is rotatably provided around the first axis E1, and is attached to the second rotating body A2. On the other hand, a second brake body D2 that can be pressed and separated is rotatably provided around a second axis E2, and the second brake body D2 includes a main body 2 having a second brake piece B2 and a linking piece 3; Connecting piece 3 that can be pressed against and separated from the two-rotating body A2
a spring holding device that elastically holds the positions of the first brake body D1 and the second brake body D2; G is provided, and the spring holding device G, the first linking piece C1, and the second linking piece C2 are rotated by the rotational operation of the first linking piece C1 or the second linking piece C2. A braking device for electrical equipment in which two brake pieces B2 and an auxiliary brake piece F are interlocked to switch between a pressed state and a separated state.