JPH0430672Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a reel motor fixing device in a magnetic recording/reproducing device such as a VTR (video tape recorder).

[Conventional technology]

As a conventional device of this type, one shown in FIG. 1 is known. In Fig. 1, the code 1 is the reel stand 5.
2 is a support member that supports the idler 1, 3a is a motor for driving the reel stand, 3b is a pulley press-fitted to the rotating shaft of the motor 3a, 4 is the idler 1, the support member 2, motor 3
A is a fixed member installed and fixed to the mechanical chassis, 6 is a biasing member that biases the idler 1 in the direction of the pulley 3b, and 7 is a light emitting member inserted into a hole in a cassette half (not shown). , 8 is a detection member for detecting the rotation of the reel stands 5a and 5b. Next, the operation will be explained. The reel stands 5a, 5b and the light emitting member 7 are respectively inserted into holes in the cassette half when the cassette half fixed to the mechanical chassis is mounted. The idler 1 is connected to the reel stand 5 mentioned above.
a, 5b and the pulley 3b of the drive motor 3a, and is a means for winding the tape by swinging its head by rotation of the motor 3a, rotating the reel stands 5a, 5b, and winding the tape. The light emitting member 7 is inserted into a hole in the cassette half and emits light to detect the end of the tape, and forms a pair of optical detection means with the light emitting member provided outside. The detection member 8 is installed at the lower part of the reel stands 5a, 5b, and detects the rotation speed and rotation direction of the reel stands 5a, 5b.

[Problem that the invention attempts to solve]

Since the conventional reel motor fixing device is constructed as described above, the light emitting member 7 and the sensing member 8 must be attached to the chassis as separate members and adjusted. This idea was made in order to eliminate the drawbacks of the conventional ones as described above, and by integrating the mounting members for the light emitting member and the detection member with the reel motor mounting member, the number of parts can be reduced and assembly time can be reduced. It is an object of the present invention to provide a reel motor fixing device in a magnetic recording/reproducing device that can eliminate the need for adjustment.

[Means to solve the problem]

In order to achieve this purpose, this invention includes an idler that contacts the reel stand and drives the reel stand;
a support member that supports the idler; a reel motor that transmits power to the idler and has a pulley attached to its rotating shaft; and a detection member that detects the end of the tape;
The present invention is characterized by comprising a detection member that detects rotation of the reel stand, and a fixing member that fixes the motor, has the support member disposed above, and supports the light emitting member and the detection member. It is something to do.

【Example】

An embodiment of this invention is shown below in Figures 2 to 4.
This will be explained based on the diagram. In FIGS. 2 to 4, reference numeral 21 is an idler that drives the reel stands 25a and 25b, and 22 is a support member that supports the idler 21. 23a
is the motor for driving the reel stand, 23b is the motor 23
A pulley 24a press-fitted onto the rotating shaft of a is a fixed member on which the idler 21, support member 22, and motor 23a are installed, and is fixed to the mechanical chassis 29 by arranging cylindrical poles 24a and 24c. 26 connects the idler 21 to the pulley 23b
A biasing member 27 biases the fixing member 24 in the direction of
A light emitting member 28 is attached to the pole 24b of a and inserted into the hole of the cassette half 30, and 28 is a photo interactor, and the reel stands 25a, 25b
This is a detection member that detects the rotation of. Next, the effect of this invention will be explained. The reel stands 25a and 25b are mechanical chassis 29.
and are respectively inserted into the holes of the cassette half 30 when the cassette half 30 is installed. The idler 21 is adjacent between the reel stands 25a, 25b and the pulley 23b of the driving motor 23a, and swings by the rotation of the motor 23a, rotates the reel stands 25a, 25b, and winds up the tape. . The light emitting member 27 is attached to a part of the fixing member 24a and inserted into a hole in the cassette half 30, and emits light to detect the end of the tape. The detection member 28 is attached to a part of the fixing member 24a at the bottom of the reel stands 25a and 25b, and
This detects the rotational speed and direction of rotations a and 25b. In the above embodiment, the motor 23a for driving the reel stand is provided exclusively, but the pulley 23b may be mounted from another drive source, such as a capstan motor, via a belt or pulley. Furthermore, although the above embodiment has been described as an example of the idler and the support member, a separate mechanism may be used.

[Effect of the idea]

As described above, according to this invention, the mounting members for the light emitting member and the detecting member are integrated with the reel motor fixing member, so the number of parts can be reduced, and the positioning and height adjustment during assembly can be made easier. Adjustment can be omitted.

[Brief explanation of drawings]

Fig. 1 is a front view showing a conventional reel motor fixing device, Fig. 2 is a plan view of a reel motor fixing device according to an embodiment of the present invention, and Figs. 3 and 4 are cross-sectional views of the reel motor shown in Fig. 2. They are a top view and a longitudinal cross-sectional view. 21... Idler, 22... Support member, 23a
...Motor, 23b...Pulley, 24a...Fixing member, 27...Light emitting member, 28...Detection member.

Claims (1)

[Scope of utility model registration request] an idler that contacts the reel stand and drives the reel stand, a support member that supports the idler, a reel motor that transmits power to the idler and has a pulley attached to its rotating shaft, and a light emitting member that detects the end of the tape. , comprising a detection member that detects rotation of the reel stand, and a fixing member that fixes the motor, has the support member disposed above, and supports the light emitting member and the detection member. A reel motor fixing device for a magnetic recording/reproducing device.