JP3009710U - Cassette loading device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a cassette loading device which is devised so that the number of parts can be reduced and the assembling can be simplified, and the loading and the eject can be secured as usual. A circular movement of a tip end portion 22a of a rack drive arm 22 swinging with a loading motor as a drive source is converted into a linear movement via a slider 2 to move a rack 4 connected to the slider 2 back and forth. In a cassette loading device for moving a cassette holder back and forth through a loading gear that meshes with the rack 4, the rack drive arm 22
Has a driving force canceling means for canceling the power transmission of the loading motor to the rack 4 before the end of the ejection so that the rack 4 operates by the operation of the spring 6 until the ejection is completed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a cassette loading device provided in a video tape recorder or the like for loading a cassette to a predetermined position in the device.

[0002]

[Prior art]

 Conventionally, in a video tape recorder, after a cassette is loaded in a cassette holder, the cassette loading mechanism inside the apparatus automatically moves the cassette holder to load it at a predetermined position in the apparatus.

In such a cassette loading mechanism, for example, as shown in FIGS. 5 to 8, a rack drive arm 22 swinging with a loading motor 21 as a drive source slides a reciprocating circular arc motion of its tip 22a. The main rack 24 connected to the slider 23 and the main rack 24 can be moved relative to the main rack 24 back and forth through a spring 25. The cassette holder 28 is configured to be moved back and forth through the connected auxiliary rack 26 and the loading gear 27 that meshes with these racks 24, 26.

This is because in the above cassette loading mechanism, when the cassette holder 28 is loaded, at the final stage of the manual operation of loading the cassette in the cassette loading port, the drive switch of the loading motor is driven by the movement of the cassette holder. This is because it is necessary to operate the cassette holder 28 such that the cassette holder 28 is pushed out from the cassette loading port at the time of ejecting, as well as being turned on.

[0005]

[Problems to be solved by the device]

 However, in this way, the rack is composed of two parts, the main rack 24 and the auxiliary rack 26, and these racks 24 and 26 are aligned in the vertical direction, meshed with the common loading gear 27, and the spring If a complicated structure such as connecting by 25 is used, there is a problem that the number of parts is large and the assembly time is long. Therefore, it was considered to make the rack a single structure and simplify the structure of this part.

The present invention has been made in view of the above circumstances, and provides a cassette loading device devised so that the number of parts can be reduced, the assembly can be simplified, and the loading and ejecting can be secured as usual. It is what

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, the circular arc motion of the tip of the rack drive arm that swings with a loading motor as a drive source is converted into a linear motion through a slider, and a rack connected to the slider is moved back and forth. In the cassette loading device that moves the cassette holder back and forth via a loading gear that meshes with the rack, the rack drive arm releases the power transmission of the loading motor to the rack before the end of ejection, and A driving force releasing means is provided so that the rack can be operated by a spring operation until the ejection is completed.

Further, as one embodiment of the driving force releasing means, a chamber having a narrow portion and a wide portion is formed in the slider into which the tip portion of the rack driving arm is inserted, and the loading is performed. At the beginning and the end of the eject, the tip of the rack drive arm is located in the wide part described above, and in the other parts, it is located in the narrow part. When released, the rack is configured to be driven by spring action.

Further, the driving force releasing means has a cam groove for swinging the rack drive arm, which is formed on a cam rotated by the rotation of the loading motor, in a predetermined region until the rack is completely ejected. It may be configured to cancel the guide by the cam. Further, a cam groove for swinging the rack drive arm, which is formed in the cam rotated by the rotation of the loading motor, is attached to the rack drive arm in a predetermined area until the rack is completely ejected, and The groove width may be sufficiently larger than the diameter of the cam follow inserted in the cam groove.

[0010]

[Action]

 According to the present invention, the circular arc motion of the front end of a rack drive arm swinging by using a loading motor as a drive source is converted into a linear motion through a slider, and a rack connected to the slider is moved forward and backward to move the rack. In the cassette loading device that moves the cassette holder back and forth via the loading gear that meshes with the rack drive arm, the rack drive arm releases the power transmission of the loading motor to the rack before the end of the ejection, and the rack is operated by the spring. Since the drive force releasing means is provided so that the cassette holder can be operated until the ejection is completed, the cassette holder is pushed by pushing the cassette against the action of the spring at the time of loading so that the cassette holder can be operated. Then, the driving motor drive switch is turned on. Further, at the time of ejecting, when the driving force releasing means has released the driving force transmission to the rack of the loading motor, the cassette holder is continuously operated by the spring operation to push the cassette out from the cassette loading port. Moreover, since the rack that is connected to the slider used here is composed of one part, the number of parts can be reduced and the assembling work can be simplified.

In particular, the driving force releasing means of the present invention constitutes a chamber having a narrow portion and a wide portion in the slider into which the tip portion of the rack driving arm is inserted, and the initial stage of loading and the end stage of ejection are completed. In addition, the tip of the rack drive arm is located in the wide part and is located in the narrow part at other times.If the power transmission is released before the end of the eject, the rack will move to the spring position. Since it is configured to be driven by motion, reliable loading is possible with a small number of parts.

Further, in the driving force releasing means of the present invention, the cam groove for swinging the rack driving arm formed in the cam rotated by the rotation of the loading motor has a predetermined area until the ejecting of the rack is completed. Since the guide is released by the cam, smooth loading can be performed as in the above.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings, in which the same components as those of the related art will be denoted by the same reference numerals. 1 is a plan view of an essential part of an embodiment according to the present invention, FIG. 2 is a side view of an embodiment of the present invention at the time of completion of ejection, and FIG. 3 is a view immediately before the completion of ejection of an embodiment of the present invention. It is a side view.

In these figures, a roll-type cam follower 13 of a rack drive arm 22 pivotally supported by a support shaft 12 is provided in a guide groove (cam groove) 11 provided in a cam 1 that rotates using a loading motor 21 as a drive source. Is slidably inserted, and the cam follower 13 is guided in the radial direction by the rotation of the cam 1, whereby the rack drive arm 22 makes an arc motion.

The rack drive arm 22 has its pin-shaped tip portion 22 a inserted into the chamber 3 formed in the slider 2, so that the circular movement of the rack drive arm 22 is converted into the linear movement of the slider 2. Can be converted to. Then, the rack 4 integrated with the slider 2 moves linearly. A loading gear 27 is meshed with the rack 4, and the cassette holder moves back and forth through the loading gear 27. A rack spring 6 made of a tension spring is stretched between the rear end of the rack 4 and a standing wall 5 formed integrally with the chassis.

In this embodiment, the rack drive arm 22 releases the power transmission of the loading motor 21 to the rack 4 before the end of the ejection, and the rack 4 operates by the spring operation of the rack spring 6 until the ejection is completed. As described above, the driving force removing means is provided. As the driving force releasing means, an upper narrow portion 3a and a lower wide portion 3b are formed in the chamber 3 of the slider 2 here.

Now, when a cassette (not shown) is inserted, the rack 4 moves in the direction of arrow A (see FIG. 1), a drive switch (not shown) for the loading motor 21 is turned on, and the loading motor 21 rotates, The cam 1 rotates in the direction of arrow B. As a result, the tip portion 22a of the rack drive arm 22 makes an arc motion. As a result, in the chamber 3, the tip portion 22a is displaced to enter the narrow portion 3a from the wide portion 3b, and the cassette loading is completed by the subsequent movement.

In the eject, the loading motor 21 is rotated in the reverse direction, the reverse rotation of the cam 1 guides the rack drive arm 22 in the opposite direction, and the rack 4 is moved through the slider 2 in the preceding stage of the eject. Force to drive. At this time, the tip portion 22a is in the narrow portion 3a, and immediately before the completion of the ejection, the tip portion 22a approaches the wide portion 3b. At this point, the driving force from the loading motor 21 is not transmitted to the slide 2. However, the rack 4 is driven to the arrow C (see FIG. 2) side by the spring operation of the rack spring 6, so that the ejection is completed by pushing out the cassette from the loading port.

As described above, in the present embodiment, the rack 4 is composed of one component, and the rack spring 6 only needs to be stretched between the rack 4 and the standing wall 5 of the chassis. In addition, the workability in the assembling work can be significantly improved, the assembling time can be greatly shortened, and the cost can be reduced.

Further, as shown in FIG. 4, the driving force releasing means includes a cam in a part of the guide groove 11 in a predetermined area until the rack is completely ejected so that the rack driving arm 22 can be rocked. A shape for releasing the guidance by 13 may be formed, for example, one in which a region having an enlarged groove width as shown by reference numeral 11a is formed. In this case, the tip of the rack drive arm 22 may achieve the engagement with the slider 2 without slack in the front-back direction of the rack 4.

In this case, in the initial stage of loading and the stage of ending ejection, the movement of the rack is not restricted by the circular movement of the rack drive arm 22 because the cam follower 13 corresponds to the area 11a, and thus the loading operation is performed. In the initial stage, the cassette holder can be manually pushed in, the drive switch of the loading motor can be turned on, and when ejecting, the cassette can be pushed out by a spring. It should be noted that the spring action for returning the rack may be given by an appropriate spring means provided on the rack drive arm 22 side instead of using the rack spring 6 as in the above embodiment. Moreover, in the present invention, the rack 4 has a single structure, so that the number of parts can be reduced and the assembling can be simplified.

As described above, according to the present invention, the circular arc motion of the tip of the rack driving arm swinging by using the loading motor as a drive source is converted into the linear motion via the slider, and the rack is connected to the slider. In a cassette loading device that moves the cassette holder back and forth through a loading gear that meshes with the rack, the rack drive arm releases the power transmission of the loading motor to the rack before the end of the ejection. A driving force releasing means is provided so that the rack operates by a spring operation until the ejection is completed.

Further, as one embodiment of the driving force releasing means, a chamber having a narrow portion and a wide portion is formed in the slider into which the tip portion of the rack driving arm is inserted, and the loading is performed. At the beginning and the end of eject, the tip of the rack drive arm is located in the wide part described above, and in other periods, it is located in the narrow part. Power transmission is released before the end of eject. Then, the rack is configured to be driven by the action of the spring.

The present invention can be implemented by providing a driving force canceling means for canceling power transmission before the end of ejection, in an appropriate place of the transmission system between the loading motor and the rack, in addition to the above-mentioned embodiment. Obviously it is. For example, in the driving force releasing means, a cam groove for swinging the rack drive arm formed in a cam rotated by the rotation of a loading motor has a predetermined area until the rack is completely ejected, May be made wide enough to cancel the guide by the cam.

[0025]

[Effect of device]

 According to the present invention, as described above, the rack drive arm releases the power transmission of the loading motor to the rack before the end of the eject, and then the rack is operated by the spring until the eject is completed. In addition, since the driving force releasing means is configured, the cassette holder is operated by pushing the cassette against the action of the spring from the cassette loading port at the time of loading, and the loading motor drive switch is turned on. At the time of ejecting, the cassette holder is continuously operated by the operation of the spring when the driving force of the loading motor is released to the rack by the driving force releasing means. Can be pushed out of. Moreover, since the rack that is connected to the slider, which is used here, is composed of one component, the number of components can be reduced and the assembling work can be simplified.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of an embodiment according to the present invention.

FIG. 2 is a side view of an embodiment of the present invention upon completion of ejection.

FIG. 3 is a side view of an embodiment of the present invention immediately before the completion of ejection.

FIG. 4 is a plan view of an essential part showing another embodiment of the present invention.

FIG. 5 is a plan view of a prior art tape deck.

FIG. 6 is a plan view of the related art.

FIG. 7 is a side view of the prior art at the time of completion of ejection.

FIG. 8 is a side view of the prior art immediately before the completion of ejection.

[Explanation of symbols]

 1 cam 2 slide 3 chamber 3a narrow part 3b wide part 4 rack 6 rack spring (spring) 11 guide groove (cam groove) 11a area 12 spindle 13 cam follow 21 loading motor 22 rack drive arm 22a tip 27 loading gear 28 cassette holders

Claims (4)

[Scope of utility model registration request] 1. A rack driving arm swinging by using a loading motor as a drive source converts an arc motion of a tip end portion of the rack driving arm into a linear motion via a slider, thereby moving a rack connected to the slider back and forth to move the rack. In a cassette loading device that moves a cassette holder back and forth via a meshing loading gear, the rack drive arm releases power transmission of a loading motor to the rack before the end of ejection, and the rack completes ejection by spring operation. A cassette loading device, characterized in that it is provided with a driving force releasing means so as to operate up to. 2. The driving force releasing means constitutes a chamber having a narrow portion and a wide portion in the slider into which the tip portion of the rack driving arm is inserted, and at the beginning of loading and the end of ejection, a chamber is formed. , The tip of the rack drive arm is located in the wide part, and is located in the narrow part at other times.When the power transmission is released before the end of the ejection, the rack is driven by the spring. The cassette loading device according to claim 1, wherein the cassette loading device is configured as follows. 3. The drive force releasing means has a cam groove formed on a cam rotated by the rotation of a loading motor for swinging the rack drive arm in a predetermined region until the rack is completely ejected. The device is configured to have a shape that cancels the guidance by.
The cassette loading device described. 4. The drive force releasing means has a cam groove formed on a cam rotated by the rotation of a loading motor for swinging the rack drive arm in a predetermined area until the rack is completely ejected. Attached to the arm,
The cassette loading device according to claim 1, wherein the groove width is sufficiently larger than the diameter of the cam follow inserted in the cam groove.