JPH0611129U - Reel stand of magnetic recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Structure] The reel stand 1 is fitted into the reel hole of the reel 7 mounted on the reel stand 1 to guide the reel hole, and engages with the recess 10 of the reel hole. The elastic guide portion 20 and the groove portion 22 serving as a stopper for restricting the movement of the guide portion 20 in the circumferential direction of the reel base 1 are provided. [Effect] Since the movement of the guide portion in the circumferential direction of the reel base is restricted by the stopper, even if the cassette tape can be smoothly mounted by making the guide portion sufficiently flexible, the reel is moved in the circumferential direction. Can be driven to
Moreover, there is no fear that the guide portion of the reel base will be damaged by an excessive load.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reel stand of a magnetic recording / reproducing apparatus.

[0002]

[Prior art]

 Generally, a magnetic recording / reproducing apparatus using a cassette tape is provided with a reel stand on which the cassette tape is mounted. The cassette tape transferred to the reel base by the cassette mounting device is mounted by fitting the reel hole into the reel base, and the cassette tape is driven by the reel base.

A reel base of a magnetic recording / reproducing apparatus which has been conventionally used and a reel of a cassette tape mounted on the reel base will be described with reference to FIGS. 5 to 9 in the case of a VHS video cassette. 5 (a) to 5 (c) show a reel stand, and this reel stand 1 has a hexagonal shaft 2 projecting from the center of its upper surface and a reel cap 3 fixed to the projecting end of this hexagonal shaft 2. A reel blade 5 whose inner circumference 4 has the same shape as the outer circumference of the hexagonal shaft 2 is fitted to the hexagonal shaft 2. The reel blade 5 is vertically movable between the reel cap 3 and the bottom of the reel base 1, and rotates together with the hexagonal shaft 2. A spring 6 is arranged around the hexagonal shaft 2, and the spring 6 urges the reel blade 5 upward.

In the reel of the VHS cassette tape, as shown in FIG. 9, convex portions 9 and concave portions 10 are alternately formed in the reel hole 8 of the reel 7. 11 is a tape. When the reel hole 8 of the reel 7 is fitted into the reel stand 1, the protrusion 12 of the reel blade 5 enters the recess 10 of the reel 7 as shown in FIGS. 5 (d) and 6 (a). When the reel base 1 rotates, the projection 12 of the reel blade 5 and the convex portion 9 of the reel 7 come into contact with each other to rotate the reel 7. A brake drum portion 13 and a driven gear portion 14 are provided around the reel stand 1. Reference numeral 15 is a chassis, 16 is a shaft fixing body, and 17 is a reel shaft.

A cassette tape accommodated in a cassette mounting device (not shown) is transferred to the upper side of the reel stand 1 and then pushed toward the reel stand 1 to descend so that the cassette tape approaches the reel stand 1. In this state, the reel base 1 is braked (not shown). The cassette tape approaching the reel stand 1 is first mounted and positioned by inserting the reel cap 3 into the reel hole 8. Next, the projection 12 of the reel blade 5 is engaged with the recess 10 formed in the reel hole 8 of the cassette tape, whereby the mounting of the cassette tape on the reel stand 1 is completed.

When the projection 12 of the reel blade 5 abuts the convex portion 9 of the reel 7 of the cassette tape when the tape cassette is mounted, as shown in FIG. 6B, the reel blade 5 is moved by the reel 7. Bend the spring 6 and push it down. When the reel base 1 is driven from this state, the projection 12 of the reel blade 5 is aligned with the recess 10 of the reel 7, and the spring 6 pushes up the reel blade 5. Then, as shown in FIG. 6A, the protrusion 12 of the reel blade 5 engages with the recess 10 of the reel 7, and the mounting of the cassette tape is completed. When the cassette tape is mounted as described above, a collision sound is generated when the reel blade 5 pushed up by the spring 6 collides with the reel cap 3.

Conventionally, in order to prevent the above-mentioned problems and reduce the number of parts, those shown in FIGS. 7 and 8 are known. In the figure, 18 and 19 are rod-shaped columns having elasticity and are formed integrally with the reel stand 1. The pillar 18 is longer than the pillar 19 and is designed to be bent more greatly. These columns 18 and 19 engage with the reel 7 as shown in FIG. 8A, and transmit the driving force in the rotational direction. A reel cap 3 is fixed to the protruding end of the reel stand 1.

Here, when the convex portion 9 of the reel 7 and the pillar 18 of the reel stand 1 come into contact with each other, the result is as shown in FIG. 8B, and the pillar 18 resists its elastic force in the axial direction. It will be pushed and the cassette will be installed. When the reel base 1 is driven from this state, the pillars 18 of the reel base 1 are returned along the convex portions 9 of the reel 7 and engage with the concave portions 10 of the reel 7 to complete the mounting of the cassette tape. In this case, unlike the reel base 1 described with reference to FIGS. 5 and 6, no collision noise is generated due to the collision between the reel cap 3 and the reel blades 5. In addition, the number of parts will also be two rather than four, which will lead to a significant cost reduction together with the reduction of man-hours.

[0009]

[Problems to be solved by the device]

 However, in the reel stand 1 described with reference to FIGS. 7 and 8, the pillars 18 and 19 cannot be easily bent because the reel 7 is driven in the circumferential direction. Therefore, the force for guiding and mounting the reel 7 in the axial direction becomes relatively large. That is, since a large force is required to bend the columns 18 and 19 in the axial direction, the reel 7 cannot be mounted smoothly. Further, when the reel base 1 is overloaded, the columns 18 and 19 may be damaged due to the force in the circumferential direction exceeding their elastic limit. there were. This invention eliminates the above-mentioned drawbacks of the prior art, and provides a reel stand of a magnetic recording / reproducing apparatus in which the above-mentioned collision noise does not occur, the reel can be smoothly mounted, and the reel stand is not damaged. Is intended.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, this invention fits into a reel hole of a cassette tape mounted on the reel table and guides the reel hole, and engages with a recess of the reel hole. The reel base is also provided with a stopper for restricting movement of the guide in the circumferential direction of the reel base. Further, the elastic guide portion and the stopper may be formed integrally with the reel stand.

[0011]

[Action]

 In the reel stand of the magnetic recording / reproducing apparatus configured as described above, the guide part is restricted from moving in the circumferential direction of the reel stand by the stopper, so that the guide part is easily bent and the cassette tape is smooth. Even if it is mounted on the reel, the reel can be driven in the circumferential direction, and there is no fear that the guide portion of the reel base will be damaged by an excessive load.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 and 2, the same parts as those in FIGS. 5 to 9 used for explaining the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. In the figure, reference numeral 20 denotes a guide portion which is easily bent in the axial direction and has sufficient elasticity, which is formed integrally with the reel stand 1 and has a protrusion 21 at its tip. The reel base 1 has a reel cap 3 fixed to the protruding end thereof, and the reel cap 3 is provided with a groove portion 22 serving as a stopper for restricting the circumferential movement of the protrusion 21 of the guide portion 20. Has been. In the figure, reference numeral b indicates the width of the guide portion 20, and b + α indicates the width of the groove portion 22 into which the protrusion 21 of the guide portion 20 is fitted.

In the reel stand 1 configured as described above, since the circumferential movement of the guide portion 20 is restricted by the stopper formed by the groove portion 22, when an excessive load is applied as in the conventional case. However, there is no fear of damage to the guide portion 20. Also, even if the thickness t of the guide portion 20 is made sufficiently smaller than the thickness s of the conventional pillar 18 so that the guide when the cassette tape is mounted becomes smooth, the circumference of the reel 7 by the reel base 1 is reduced. It does not hinder the transmission of the driving force in the direction.

In the above embodiment, the reel cap 3 is fixed to the protruding end portion of the reel base 1, but as shown in FIGS. 3 and 4, instead of the reel cap 3, the reel base 1 is replaced. A cassette tape guide portion 23 may be formed on the guide portion 23, and the guide portion 23 may be provided with a groove portion 24 that serves as a stopper for restricting the circumferential movement of the protrusion 21 of the guide portion 20. In FIGS. 3 and 4, the same reference numerals as those in FIGS. 1 and 2 denote the same parts, and thus detailed description thereof will be omitted. In the case shown in FIGS. 3 and 4, the number of parts is one, and there is no need to assemble by simply molding, which can result in cost reduction.

[0015]

[Effect of device]

 As described above, according to the present invention, there is no generation of a collision noise due to the collision between the reel blade and the reel cap, the cassette tape can be smoothly mounted, and the reel stand is not damaged. The effect of is obtained.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (a)
Is a plan view of the reel stand, (b) is a sectional view of the reel stand,
(C) is a side view of a reel stand, (d) is a top view which shows the engagement state of a reel stand and a reel.

FIG. 2 shows an embodiment of the present invention (a)
FIG. 3B is a sectional view showing a state where the cassette tape is completely attached to the reel stand, and FIG. 9B is a sectional view showing a state where the reel and the reel stand are in contact with each other.

FIG. 3 shows another embodiment of the present invention,
(A) is a plan view of a reel stand, (b) is a cross-sectional view of the reel stand, (c) is a side view of the reel stand, and (d) is a plan view showing an engagement state between the reel stand and the reels.

FIG. 4 shows another embodiment of the present invention,
FIG. 7A is a sectional view showing a state where the cassette tape is completely attached to the reel stand, and FIG. 9B is a sectional view showing a state where the reel and the reel stand are in contact with each other.

FIG. 5 shows a conventional example, (a) is a plan view of a reel stand, (b) is a sectional view of the reel stand, (c) is a side view of the reel stand, and (d) is a reel stand and reels. It is a top view which shows the engagement state with.

FIG. 6 is a cross-sectional view showing a conventional example, in which a cassette tape is completely mounted on a reel stand;
(B) is a sectional view of a state where the reel and the reel base are in contact with each other.

7A and 7B show another conventional example, where FIG. 7A is a plan view of a reel stand, FIG. 7B is a sectional view of the reel stand, FIG. 7C is a side view of the reel stand, and FIG. FIG. 6 is a plan view showing an engagement state between the reel and the reel.

FIG. 8 shows another conventional example, in which (a) is a cross-sectional view of a state in which the cassette tape is completely mounted on the reel stand,
(B) is a sectional view of a state where the reel and the reel base are in contact with each other.

9A and 9B show a generally known reel of a cassette tape, in which FIG. 9A is a sectional view and FIG. 9B is a bottom view.

[Explanation of symbols]

 1 reel stand 2 hexagonal shaft 3 reel cap 4 inner circumference 5 reel blade 6 spring 7 reel 8 reel hole 9 convex part 10 concave part 11 tape 12 protrusion 13 brake drum part 14 driven gear part 15 chassis 16 shaft fixed body 17 reel shaft 18 Pillars 19 Pillars 20 Guides 21 Projections 22 Grooves 23 Cassette Tape Guides 24 Grooves

Claims (2)

[Scope of utility model registration request] 1. A magnetic recording / reproducing apparatus comprising a reel stand on which a cassette tape is mounted, wherein the reel stand is fitted into a reel hole of the cassette tape mounted on the reel stand. In the one provided with an elastic guide portion that guides the hole and is engaged with the concave portion of the reel hole, the reel base regulates the movement of the guide portion in the circumferential direction of the reel base. A reel stand for a magnetic recording / reproducing apparatus, which is also provided with a stopper. 2. The reel stand of the magnetic recording / reproducing apparatus according to claim 1, wherein the elastic guide portion and the stopper are integrally formed with the reel stand.