JPS647484Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention is applicable to cases in which the rotational movement of a first member and the translational movement of a second member reciprocatably combined therewith are performed in conjunction with each other. The present invention relates to a damper device that can reliably apply a damping force to both two different types of operations using only a single damping means.

BACKGROUND ART For example, in a cassette attachment/detachment mechanism of a cassette deck, a cassette case into which a cassette is inserted has a double structure consisting of an outer case and an inner case slidably fitted into the outer case. The inner case is moved forward or backward in the cassette insertion or ejection direction in conjunction with the opening/closing operation of the outer case, and the cassette insertion or ejection operation is automatically performed in conjunction with the opening/closing operation of the outer case. It is possible that By the way, when attempting to apply a buffering force to two originally different types of motion, such as the rotational motion of the outer case and the linear motion of the inner case, usually at least a separate buffering means is required for each motion system. Two types are required. Therefore, the installation space and the number of component parts are required to correspond to at least two systems of buffer means, and the installation space is required accordingly. Moreover, the number of component parts increases accordingly, resulting in an increase in the size of the device, as well as a problem in that the configuration becomes complicated and costs increase.

DISCLOSURE OF THE INVENTION The purpose of this invention is to perform two different systems of motion, such as the rotational motion of the first member and the linear motion in the reciprocating direction of the second member combined therewith. It is an object of the present invention to provide a damper device that can reliably provide a damping effect only by means of the following, has a simple structure, and can be manufactured at low cost.

In order to achieve the above object, this invention includes a first member that is pivotally connected to rotate within a predetermined range from one direction to another and in the opposite direction; are movably assembled, and are moved from a first position to a second position by rotation of the first member in one direction, and from the second position by rotation of the first member in the other direction; and a second member that moves back to the first position, one end of which is pivotally connected to the second member, and the second member rotates in the forward movement direction and moves along a predetermined trajectory. and move along the second
a lever body having a rack on one side that rotates in the backward movement direction and moves back along the trajectory due to the backward movement of the member; and a gear that meshes with the rack; and a second member, respectively, a means for applying a resistance force to dampen movement in at least one direction; and a means attached to the free end of the lever body to move the lever body in a direction in which its rack engages with the gear. It is composed of a spring that biases the

According to this invention, two systems that are different from each other, such as the rotational movement of the first member and the linear movement of the second member combined therewith in the reciprocating direction accompanying the rotation of the first member, are provided. It is possible to reliably provide a buffering effect to each operation of the system using a single means with a simple structure, and unlike the conventional method where a separate buffering means is provided for each system, the installation space is extremely small. well,
Furthermore, the number of component parts can be reduced accordingly. Therefore, it is possible to save space and make the apparatus compact. Furthermore, the structure is extremely simple due to the reduction in the number of parts. Moreover, it has an extremely simple structure consisting of a lever body, a resistance force applying means having a gear that meshes with a rack provided on the lever body, and a spring that biases the lever body in the direction of the force applying means. It is extremely simple, and together with the reduction in the number of parts, the manufacturing cost is low, which has the effect of contributing to cost reduction. Furthermore, by reducing the number of parts, the frequency of failures and the like is significantly reduced compared to conventional products, and stable buffering performance can also be obtained.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of a cassette attachment/detachment device in a cassette deck or the like to which the present invention is applied;
FIG. 2 is a side view of the main part.

In the figure, reference numeral 10 denotes a cabinet in which a cassette entrance/exit part 11 is opened at a predetermined position. A cassette case 20 into which a cassette is inserted is provided in the cassette entry/exit portion 11. The cassette case 20 has a double structure consisting of an outer case 21 whose front and lower surfaces are open, and an inner case 22 which is fitted into the outer case 21 and assembled integrally.

The outer case 21 is pivotally connected to both sides of the entrance/exit part 11 by a pair of shafts 23 and 24 protruding from both sides of one end so as to be openable and closable.

The inner case 22 is formed into a substantially rectangular box shape with an open front, and the cassette A is loaded through the opening. The inner case 22 is fitted into and supported by the outer case 21 so as to be slidable back and forth in the cassette insertion or ejection direction. A pair of protrusions 25, 2 are provided on both sides of the inner case 22.
5 are formed to protrude along the sliding direction, and these protrusions 25, 25 are fitted and guided into guide grooves 26, 26 formed on both sides of the inner surface of the outer case 21.
The inner case 22 is provided with an appropriate presser spring (not shown) that presses and holds the inserted cassette A. In addition, the outer case 21 and the inner case 22 are equipped with a cassette so that the cassette inserted therein can be visually observed.
A transparent window is provided (not shown).

A first gear 30 is integrally provided on one side of the outer case 21 and is coaxial with one shaft 23 . This gear 30 is formed into a fan shape. On the other hand, a pair of second gears 31, 31 are pivotally attached to the sides of the chassis 12 on both sides of the outer case 21, and one of the gears 31 meshes with the first gear 30. Third gears 32, 32 having a larger diameter than the gears 31, 31 are pivotally connected to the gears 31, 31, respectively, with their central axes being coaxial.

A pair of racks 33, 33 are provided on both sides of the lower surface of the inner case 22 along the sliding direction, and the racks 33, 33 mesh with the third gears 32, 32, respectively. The rack 33 is formed into a convex curved surface whose tooth surface is curved and bulged in the direction of the gear 32 with a predetermined curvature. As a result, when the inner case 22 slides back and forth, the rack 33 does not come off from the third gear 32 or the meshing condition between the two becomes poor, thereby ensuring a reliable and good meshing condition at all times. can be retained.

The outer case 21 is urged by a spring 40 in a direction in which it is always closed from the cassette entrance/exit portion 11 of the cabinet 10. One end of the spring 40 is attached to the outer case 2
Projecting piece 2 provided on the rear end (left side in Figure 1) of 1
10, and the other end is attached to the chassis 12 via a suitable fixture. This spring 4
A driving force in the lid opening direction is applied to the outer case 21 by the urging pressure of 0. A protrusion 211 is provided at the tip of the outer case 21, and the chassis 1 is attached to this protrusion 211.
A locking pawl 410 of a locking piece 41 pivotally attached to the side of 2 is adapted to engage. Due to this engagement, the outer case 21 is held in the closed position, and when the engagement is released, the outer case 21 is biased by the spring 40 and opened. This engagement is released by operating an eject button (not shown).

Supply and take-up reel stands 42, 43 are rotatably installed on the lower chassis base of the cassette entry/exit section 11.

Next, FIG. 3 shows the main part of the damper device of the present invention, in which one side of the outer case 21 is cut out within a predetermined range, and one end of the lever body 50 is inserted through this cutout 212. One end of the lever body 50 is pivotally connected to a predetermined position on the side of the inner case 22 by a shaft 51 so as to be relatively rotatable. The other end of the lever body 50 extends freely downward from the inner case 22, and a rack 52 is cut into one side thereof along the longitudinal direction.

On the other hand, a resistance force applying means, that is, a damper means 53 is pivotally mounted at a predetermined position on the side of the chassis 12 so as to be rotatable. This damper means 53 is for simultaneously imparting a damping effect to mutually different movements in two directions: the rotational movement of the outer case 21 and the linear movement of the inner case in the reciprocating direction. A gear 54 that meshes with the rack 52 of the lever body 50 is integrally attached to the damper means 53 with its central axis being coaxial.

At the other end, that is, the free end of the lever body 50, a rack 52 for holding the lever body is connected to the gear 5 of the damper means 53.
One end of a spring 55 is attached to which the spring 55 is always biased in the direction of engagement. The other end of the spring 55 is fixed to a predetermined position on the chassis 12 via a fixing fitting or the like. The spring 55 is set so as to allow the lever body 50 to freely rotate around the gear 54 with the shaft 51 as a fulcrum, and to faithfully follow the rotational movement.

Note that various types of damper means 53, such as an air damper and an oil damper, can be used.

Next, the operation of the present device configured as above will be explained.

First, cassette A shown in FIG.
When the eject button is operated to release the engagement between the locking pawl 410 of the locking piece 41 and the protrusion 211 from the loaded and set state on the outer case 2, 43, the outer case 21 is biased by the spring 40. Arrow 1 in Figure 4
As shown by 00, the cassette is rotated upward from the cassette entrance/exit portion 11 and opened at a predetermined angle. When the outer case 21 starts opening, the first gear 30 rotates counterclockwise as shown by the arrow 101 in FIG. Rotate clockwise as shown. At the same time, the third gears 32, 32 rotate in the same direction together with the second gears 31, 31. This rotation causes the third gear 3
2 moves in the direction shown by arrow 103, and the inner case 22 moves in the direction shown by arrow 103.
The cassette A slides in the ejection direction indicated by 03 and is pushed out to a position protruding from the front end surface of the outer case 21 within a predetermined range.

On the other hand, due to the rotation of the outer case 21, the inner case 22
When the lever body 50 slides in the cassette ejection direction, the lever body 50 moves from the position shown in FIG. 3 to the gear 5.
4 in the clockwise direction and moves in the direction of movement of the inner case 22 as shown by arrow 110 in FIG. At this time, the lever body 50 operates with its rack 52 meshing with the gear 54 due to the bias of the spring 55. Then, the gear 54 is indicated by the arrow 111
Rotate in the direction shown. This rotation causes the damper means 53 to rotate in the direction of the same arrow 111, and transmits its resistance force to the lever body 50 through the gear 54 and the rack 52. This resistance force is transmitted from the lever body 50 to the inner case 22, and at the same time, the inner case 22
It is also transmitted to the outer case 21 through 2. As a result, the outer case 21 receives a resistance force in the direction of rotation, and the opening operation thereof is buffered and performed slowly. At the same time, the inner case 22 receives a resistance force in the moving direction, and its movement is buffered and performed slowly.

Thus, when the outer case 21 is completely opened as shown in FIG.
The cassette A is pushed out a predetermined length from the front end surface of
The ejection operation is completed.

On the other hand, when loading a cassette, the outer case 21 shown in FIGS. 1 and 4 is opened and the inner case 2 is opened.
With cassette 2 pushed out, insert cassette A into inner case 2.
When the cassette A is inserted into the inner case 22, the cassette A is held at a normal position within the inner case 22 by being pressed by the above-mentioned presser spring. Next, when the outer case 21 is pushed in the direction of closing the lid, the first gear 30 rotates clockwise, and the second gear 31 that meshes with the first gear 30 rotates counterclockwise in the direction opposite to the arrow 102. At the same time, the third gear 32
rotates in the same direction as the second gear 31, and the rack 33 that meshes with it moves in the opposite direction to the arrow 103 shown in FIG. As a result, inner case 22
is drawn into and stored inside the outer case 21 from a position protruding from the front end surface thereof. When the outer case 21 completely closes the cassette entrance/exit section 11, the inner case 22 is completely housed within the outer case. At this time, cassette A is supplied and taken up at the reel stand 4 at the same time.
2,43 and its loading is done.
On the other hand, when the inner case 22 slides in the loading direction of the cassette A, the lever body 50 is biased by the movement and rotates counterclockwise around the gear 54 from the position shown in FIG. 110 along the moving direction of the inner case 22.
At this time, the free end of the lever body 50 is biased by the spring 55 in a direction in which the rack 52 engages with the gear 54 as indicated by an arrow 112.

When the lever body 50 moves in the direction opposite to the arrow 110, the gear 54 engaged with the rack 52 rotates in the opposite direction to the arrow 111. Due to this rotation, the damper means 53 rotates in the same direction, and its resistance is transmitted to the lever body 50 through the engagement between the rack 52 and the gear 54. It should be noted that this resistance force is set so that it is lighter than when ejecting cassette A.

When the resistance force is transmitted to the lever body 50, the resistance force is transmitted to the inner case 22 and the outer case 21, and the movements of both are buffered and performed slowly in the same manner as described above. In this case, the resistance force is greater than that when the cassette is ejected from both cases 21 and 2.
The settings are made so that the second action can be performed smoothly and easily. In addition, by applying a resistance force in the cassette loading direction in this way, even if the outer case 21 is suddenly closed, the rack 52 and gear 54 can be meshed without coming apart. It can be reliably maintained in a closed state.

It goes without saying that the damping force by the damper means 53 may be applied only when the cassette is ejected, and not applied in the free state when the cassette is loaded.

According to the device of this embodiment, when the lever body 50 is moved in any direction, the rack 52 is reliably held in the engaged state with the gear 54 by the biasing force of the spring 55 without any disengagement. The spring 55 performs a telescopic operation that follows the movement of the lever body 50 in any direction,
The lever body 50 is allowed to move freely, and the lever body 50 is smoothly operated in two different directions: rotation of an outer case 21 and reciprocating sliding of an inner case 22.

In this way, the rotational movement of the outer case 21 and the reciprocating sliding movement of the inner case 22 in two different directions, that is, two systems, can be simultaneously and reliably damped by a single damper mechanism with an extremely simple structure. can give power.

In addition, in the embodiment, the case where this invention is applied to the cassette insertion/ejection operation of the cassette loading/unloading mechanism in a cassette deck has been described, but this invention is not limited to this, and can be applied to other devices such as two-system interchangeability. This can be widely applied to cases where it is desired to apply a buffering force to different operations using a single buffering means. Moreover, it is extremely suitable for application in such cases.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a cassette attachment/detachment device in a cassette deck to which this invention is applied;
FIG. 2 is a sectional view of the main part thereof, FIG. 3 is a sectional side view of the main part of the present device, and FIG. 4 is a side sectional view illustrating the operation of the present device. 21... Outer case (first member), 22... Inner case (second member), 50... Lever body, 52
...Rack, 53...Damper means (resistance imparting means), 54...Gear, 55...Spring.

Claims (1)

[Scope of utility model registration request] a first member pivotally mounted to rotate within a predetermined range from one direction to the other; and a first member slidably assembled to the first member to rotate in one direction. a second member that moves forward from the first position to the second position by rotation of the member and returns from the second position to the first position by rotation of the first member in the other direction; One end is pivotally connected to the second member, and when the second member moves forward, it rotates and moves in the forward movement direction, and when the second member moves back, it moves in the backward movement direction. It has a lever body with a rack on one side that rotates and returns to its original position, and a gear that meshes with the rack, which allows each of the first member and the second member to move in at least one direction. A damper device comprising a resistance force applying means for applying a damping resistance force, and a spring attached to the free end of the lever body to bias the lever body in a direction in which its rack engages with the gear.