JPH11230204A - Braking means and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking means structured simply and an electronic equipment provided with the means, which generates a braking effect in only one direction. SOLUTION: This means comprises: A fixed portion 41; a movable portion 42 engaged with a movable body and mounted to the fixed portion 41 so as to be movable in two directions; a restricting part 44 positioned between the fixed portion 41 and the movable portion 42 so as operate to simultaneously with the movable portion 42 while restricting the movement of the movable portion 42 in one direction and to move only the movable portion 2, without limiting the movement of the movable portion 42 in the other direction; and a braking member 43 interposed between the movable portion 42 and the restricting part 44 to brake the movement of the restricting part 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking means for braking the movement of a moving body and an electronic apparatus provided with the braking means.

[0002]

2. Description of the Related Art A tape recorder using, for example, a cassette tape as an electronic device is provided with a movable opening / closing lid at an opening for inserting and removing the cassette tape. Such a lid is urged in the opening direction by an urging member such as a spring, and is locked to the main body by a locking portion at a closed position. Therefore, when opening the lid, the cassette removal button is pressed to release the locking portion, and when the lid is closed, the lid is pressed to lock the locking portion. However, since the lid is always urged by the urging member, in the above-described structure, when the cassette removal button is pressed, the lid is opened vigorously at the same time, generating an unpleasant sound. In order to prevent the generation of this unpleasant sound, there is a structure in which a damper as a braking means is attached to the lid.

FIG. 7 is a perspective view showing an example of a general tape recorder, and FIG. 8 is a sectional side view taken along line AA of FIG. The tape recorder 10 includes a box-shaped main body 11, a mechanism section for driving the cassette tape, a circuit section, and the like. The opening section 13 has a lid 12 on the front surface of the main body 11 for inserting and removing the cassette tape. A speaker 14 that emits sound and the like recorded on a cassette tape is disposed.

[0004] One end of a substantially L-shaped arm 15 is
The arm 15 is rotatably mounted inside the main body 11.
Is integrally attached to a corner of the lid 12. The rotating end of the arm 15 has a torque coil spring 1
6 is attached, and near the lid attachment end of the arm 15,
A damper 20 is provided. One end of the torque coil spring 16 is locked to the outer peripheral portion on the rotation end side of the arm 15, and the other end of the torque coil spring 16 is locked to the main body 11. Further, the damper 20 is engaged with a plurality of teeth 15 a formed on the outer peripheral portion of the arm 15 on the side of the lid mounting end.

FIG. 9A is a partial cross-sectional plan view showing an example of a conventional damper, and FIG. 9B is a partial cross-sectional side view thereof. The damper 20 is a rotary grease-enclosed damper, and includes a bracket 21, a gear 22, and a grease 23.
Etc. are provided. The bracket 21 is a fixed-side component. A cylindrical guide shaft 21b for guiding rotation of the gear 22 is provided at a central portion on one surface side of the rectangular pedestal portion 21a.
Are integrally formed, a plurality of concentric cylindrical ribs 21c for enclosing the grease 23 around the guide shaft 21b are integrally formed, and a tape is provided on the other surface side of the pedestal portion 21a. A fixing portion 21d for fixing the main body 11 of the recorder 10 with a screw or the like is integrally formed.

The gear 22 is a rotating part, and a plurality of teeth 22b meshing with a plurality of teeth 15a formed on the outer peripheral portion of the arm 15 on the lid mounting end side on the outer peripheral surface of the cylindrical main body 22a. A cylindrical guide hole 22c into which the guide shaft 21b of the bracket 21 is inserted and a concentric cylinder into which each rib 21c of the bracket 21 is inserted are formed on one surface side of the main body 22a. A plurality of rib holes 22d are formed. The bracket 21 and the gear 22 having such a configuration are assembled as follows. That is, grease 23 is applied to the surfaces of the guide shaft 21 b and the rib 21 c of the bracket 21, the guide shaft 21 b of the bracket 21 is inserted into the guide hole 22 c of the gear 22, and the rib 21 c of the bracket 21 is inserted into the rib hole 22 d of the gear 22. Is configured as a damper 20.

The opening / closing operation of the lid 12 of the tape recorder 10 having the damper 20 having such a configuration will be described with reference to FIG. First, when the cassette removal button is pressed to release the locking portion, the arm 15 is pushed in the direction of the arrow a in the drawing to rotate by the restoring force of the torque coil spring 16, so that
The lid 12 attached to the arm 15 turns in the direction of the arrow b in the figure. At this time, the arm 15 is
The fifth tooth 15a rotates while meshing with the tooth 22b of the gear 22 of the damper 20, so that the tooth 15a gradually rotates due to the viscous resistance of the grease 23 of the damper 20.

That is, the gear 22 of the damper 20 rotates while being guided by the guide shaft 21b of the bracket 21 about the guide hole 22c. At this time, the guide hole 22c and the rib hole 22d of the gear 22 and the guide The grease 23 interposed in a relatively large area between the shaft 21b and the rib 21c acts to brake the rapid rotation of the gear 22, so that the arm 15 rotates gradually. Therefore, the lid 12 also gradually turns and opens.
Next, the user presses the lid 12 and turns it in the direction of the arrow c shown in the drawing.
The arm 15 is rotated in the direction indicated by the arrow d to elastically deform the torque coil spring 16. Then, the lid 12 is closed by being locked by the locking portion.

[0009]

In the above-described structure of the conventional damper 20, since the gear 22 can be rotated in the forward direction and the reverse direction in the same manner, when the cover 12 is opened, not only the damper effect is exhibited. Also, when the cover 12 is closed, the damper effect is exerted. Therefore, a high pressing force is required when closing the lid 12, and there is a disadvantage that the lid 12 is felt heavy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a braking means capable of producing a braking effect in only one direction with a simple structure, and an electronic apparatus having the braking means. It is an object.

[0011]

The object of the present invention is to provide a braking means for braking the movement of a moving body, wherein the fixing means is engaged with the moving body, and A movable part operably mounted in two directions;
The movable portion is disposed between the fixed portion and the movable portion, regulates one-way operation of the movable portion and operates integrally with the movable portion, and is movable without restricting operation of the movable portion in another direction. This is achieved by providing a regulating unit that operates only the unit, and a braking member that is interposed between the movable unit and the regulating unit and that brakes the operation of the regulating unit.

[0012] According to the above configuration, the restricting portion operates together during the one-way operation of the movable portion, so that the operation of the movable portion is braked by the action of the braking material between the restricting portion and the fixed portion. . On the other hand, during operation of the movable part in the other direction, the restriction part is separated, so that the movable part operates alone without being affected by the braking material.
Therefore, the braking effect can be generated only in one direction of the movable part, and the pressing force when operating the movable part in the other direction can be reduced.

[0013]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 is a perspective view showing an embodiment of an electronic apparatus provided with the braking means of the present invention, and FIG.
It is a line sectional side view. The tape recorder 30, which is an electronic apparatus, is a moving body in which a mechanical unit for driving a cassette tape, a circuit unit, and the like are arranged inside a box-shaped main body 31, and a cassette tape is put in and out of the front of the main body 31. An opening 33 having a lid 32, a speaker 34 that emits sound and the like recorded on a cassette tape, and the like are arranged.

Then, one end of the substantially L-shaped arm 35 is
The arm 35 is rotatably mounted inside the main body 31.
Is integrally attached to a corner of the lid 32. The rotating end of the arm 35 has a torque coil spring 3
6 is attached, and near the lid attachment end of the arm 35,
A damper 40 as a braking means is provided. One end of the torque coil spring 36 is locked to the outer peripheral portion on the rotation end side of the arm 35, and the other end of the torque coil spring 36 is connected to the main body 31.
It is locked to. Further, the damper 40 is engaged with a plurality of teeth 35 a formed on the outer peripheral portion of the arm 35 on the side of the lid mounting end.

FIG. 3A is a partial sectional plan view showing an embodiment of the damper of the present invention, and FIG. 3B is a partial sectional side view thereof. The damper 40 is a rotary grease-enclosed damper, and includes a bracket (fixed portion) 41, a gear (movable portion) 42, a grease (braking material) 43, a limiter (restriction portion) 44, and the like. The bracket 41 is a fixed component, and as shown in FIG.
On one side of 1a, a gear 42 and a limiter 44 are provided at the center.
And a plurality of concentric cylindrical ribs 4 for sealing the grease 43 around the guide shaft 41b.
1c is integrally formed, and a fixing portion 41d for fixing to the main body 31 of the tape recorder 30 with screws or the like is integrally formed on the other surface side of the pedestal portion 41a.

The limiter 44 is a restricting component that acts as a one-way clutch. As shown in FIG. 5, one side of the flange portion 44a on the disk has a central portion for guiding the rotation of the gear 42. And a cylindrical guide hole 44c into which the guide shaft 41b of the bracket 41 is inserted is formed on the other surface of the flange portion 44a. A plurality of concentric cylindrical rib holes 4 into which the respective ribs 41c are inserted.
4d is formed. Further, on the outer peripheral surface of the flange portion 44a, a plurality of clutch portions 44e for regulating the rotation of the limiter 44 itself in one direction are provided at equal intervals (in this example, 120 °).
3 each). This clutch part 44e is
A tapered portion 44ea formed so as to be tapered along the outer peripheral surface of the flange portion 44a, and the tapered portion 44ea
The spring portion 44eb is formed to have a wavy shape extending from the ea, and the wedge bite portion 44ec formed in an array at the tip of the spring portion 44eb.

The gear 42 is a rotating part, and as shown in FIG. 6, a plurality of teeth formed on the outer peripheral surface of the arm 35 on the lid mounting end side on the outer peripheral surface of the cylindrical main body 42a. 3
5a, a plurality of teeth 42b are formed to mesh with the guide shaft 44b of the limiter 44 on one surface side of the main body 42a.
Are formed, and a columnar storage portion 42d for storing the flange portion 44a of the limiter 44 and each clutch portion 44e is formed.

The bracket 41 and the gear 4 having such a configuration
2 and the limiter 44 are assembled as follows. That is, the guide shaft 41 b of the bracket 41 and the rib 4
Grease 43 is applied to the surface of 1c, guide shaft 41b of bracket 41 is inserted into guide hole 44c of limiter 44, and rib 41c of bracket 41 is inserted into limiter 44.
Into the rib hole 44d. Further, the guide shaft 44b of the limiter 44 is inserted into the guide hole 42c of the gear 42, and the spring 44 of each clutch 44e of the limiter 44 is inserted.
eb is compressed along the outer peripheral surface of the flange portion 44a, and the wedge bite portion 44ec is connected to the gear 42 together with the clutch portions 44e arranged between the tapered portions 44ea.
Is stored as a damper 40 in the storage section 42d. Since the damper 40 is substantially the same in shape as the conventional damper 20, it can be mounted by the same mounting method as the conventional mounting method.

The opening / closing operation of the lid 32 of the tape recorder 30 having the damper 40 having such a configuration will be described with reference to FIGS. First, when the locking portion is released by pressing the cassette removal button, the arm 35 is pushed and rotated in the direction of the arrow a in the figure by the restoring force of the torque coil spring 36, so that the lid 32 attached to this arm 35 is rotated by the arrow b in the figure. Turn in the direction. At this time, the arm 35
The teeth 35a of the arm 35 are the teeth 42 of the gear 42 of the damper 40.
Rotate while engaging with b. The gear 42 at this time is
Guide shaft 44a of limiter 44 centering on guide hole 42c
While rotating in the direction of the arrow c in the figure while being guided by the
The ec bites between the tapered portion 44ea of the other clutch portion 44e and the inner peripheral surface of the storage portion 42d of the gear 42.

Therefore, the wedge bite portion 44ec of each clutch portion 44e and the tapered portion 4ec of the other clutch portion 44e.
The gear 42 and the limiter 44 are integrated by the frictional force between the gear 4ea and the inner peripheral surface of the storage portion 42d of the gear 42, and the guide shaft 41b of the bracket 41 is centered on the guide hole 44c.
It will rotate while being guided by. However, at this time, the guide hole 44c and the rib hole 44d of the limiter 44 are provided.
And the abrupt rotation of the integrated gear 42 and limiter 44 is braked by viscous resistance of the grease 43 interposed in a relatively large area between the guide shaft 41b and the rib 41c of the bracket 41. The arm 35 will gradually rotate. Therefore, the lid 32 also gradually turns and opens.

Next, the arm 32 is rotated in the direction of the arrow e shown in the figure by pressing the lid 32 and turning it in the direction of the arrow d shown in the figure.
The torque coil spring 36 is elastically deformed. At this time, the arm 35 rotates while the teeth 35a of the arm 35 mesh with the teeth 42b of the gear 42 of the damper 40. At this time, the integrated gear 42 and limiter 44 rotate in the illustrated arrow f direction while being guided by the guide shaft 41b of the bracket 41 around the guide hole 44c. However, only the rotation of the limiter 44 is braked by viscous resistance of the grease 43 interposed in a relatively large area between the guide hole 44c and the rib hole 44d of the limiter 44 and the guide shaft 41b and the rib 41c of the bracket 41. And the wedge bite portion 44e of each clutch portion 44e of the limiter 44
c is separated from the tapered portion 44ea of the other clutch portion 44e, the frictional force is released, and the gear 42
Only the guide hole 42c is centered on the guide shaft 44a of the limiter 44 and smoothly rotates in the direction indicated by the arrow f. Therefore, since the arm 35 also rotates smoothly, the lid 32 can also be smoothly rotated with a low pressing force and locked by the locking portion and closed.

In the above-described embodiment, the limiter 44
Part 44e which is each component of the clutch part 44e of FIG.
a, the spring portion 44eb and the wedge bite portion 44ec are integrally formed, but the taper portion 44ea and the spring portion 44eb or only the spring portion 44eb and the wedge bite portion 44ec may be integrally formed. You may comprise independently. In addition, although the three clutch parts 44e of the limiter 44 are arranged, the present invention is not limited to this, and one or more clutch parts may be arranged. Further, the limiter 44 is configured as a one-way clutch using a wedge, but is not limited to this. If the limiter 44 can function as a one-way clutch, for example, a one-way clutch using a ratchet (claw) is used. You may comprise.

[0024]

As described above, according to the present invention,
Since the braking effect can be generated only in one direction with a simple configuration, the operation of the moving body in one direction is moderated,
The pressing force when operating in the other direction can be reduced.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view showing an embodiment of an electronic apparatus including a braking unit according to the present invention.

FIG. 2 is a cross-sectional side view of the electronic device taken along line AA of FIG.

FIG. 3 is a partial cross-sectional plan view and a partial cross-sectional side view showing an embodiment of the braking means of the present invention.

FIG. 4 is a partial cross-sectional plan view and a partial cross-sectional side view showing a first example of components of the braking means of FIG. 3;

5 is a partial cross-sectional plan view and a partial cross-sectional side view showing a second example of the components of the braking means of FIG. 3;

6 is a partial cross-sectional plan view and a partial cross-sectional side view illustrating a third component example of the braking unit of FIG. 3;

FIG. 7 is a perspective view showing an example of an electronic apparatus provided with a conventional braking unit.

8 is a sectional side view of the electronic device taken along line AA of FIG. 7;

FIG. 9 is a partial sectional plan view and a partial sectional side view showing an example of a conventional braking means.

[Explanation of symbols]

30 tape recorder, 31 body, 32 ...
・ Cover, 33 ・ ・ ・ Opening, 34 ・ ・ ・ Speaker, 35 ・
..Arm, 35a teeth, 36 torque coil springs, 40 dampers, 41 brackets, 42
... gear, 43 ... grease, 44 ... limiter,
41a: pedestal, 41b: guide shaft, 41c
..Rib, 41d: fixed portion, 42a: body portion,
42b ... teeth, 42c ... guide holes, 42d ...
Storage portion, 44a: flange portion, 44b: guide shaft, 44c: guide hole, 44d: rib hole, 44
e: clutch part, 44ea: taper part, 44e
b: Spring part, 44ec: Wedge bite part

Claims (7)

[Claims] 1. A braking means for braking the movement of a moving body, comprising: a fixed part; a movable part engaged with the moving body and operably attached to the fixed part in two directions; The movable portion is disposed between the fixed portion and the movable portion, regulates one-way operation of the movable portion and operates integrally with the movable portion, and is movable without restricting operation of the movable portion in another direction. A braking means, comprising: a regulating portion that operates only a portion; and a braking member that is interposed between the movable portion and the regulating portion and that brakes the operation of the regulating portion. 2. The braking means according to claim 1, wherein said movable portion rotates. 3. The braking means according to claim 1, wherein said movable portion is a gear. 4. The braking means according to claim 1, wherein said regulating portion utilizes a wedge. 5. The braking means according to claim 1, wherein said regulating portion utilizes a pawl. 6. The braking means according to claim 1, wherein said braking material is a material having high viscous resistance. 7. An electronic apparatus, comprising: a moving body; and a braking unit that brakes movement of the moving body, wherein the braking unit is engaged with a fixed unit, and the moving unit. A movable part operably attached to the movable part in two directions, and disposed between the fixed part and the movable part. The movable part regulates one-way operation of the movable part and operates integrally with the movable part. A restricting portion that operates only the movable portion without restricting the operation of the movable portion in the other direction; and a movable portion that is interposed between the movable portion and the restricting portion and is integral with the restricting portion. An electronic device, comprising: a braking member for braking an operation in a direction.