JP3228074B2 - Operation knob load applying mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating knob load applying mechanism, and more particularly to an operating knob load applying mechanism configured to apply a load so that the operating knob does not rotate freely.

[0002]

2. Description of the Related Art In a portable electric appliance or the like in which an operation knob is provided so as to protrude from an apparatus, the operation knob is automatically rotated by a hand touching the operation knob or by vibration during transportation of the apparatus. And may deviate from the initially set position. In particular, when recording sound while moving using a portable tape recorder or the like, if the recording volume knob provided outside the device for adjusting the recording level rotates during recording. The recording level recorded on the magnetic tape changes.

Therefore, when moving while recording, it is necessary to prevent the operation knob from rotating without permission. As means for preventing such inconveniences, an operation for applying a load to a rotating shaft to which the operation knob is coupled to prevent the operation knob from rotating due to vibration at the time of movement or touching the hand. The development of a knob load application mechanism is underway.

As a conventional operation knob load applying mechanism,
For example, there is a configuration disclosed in Japanese Utility Model Laid-Open No. 5-66508. According to the configuration of this publication, an O-ring is fitted to the outer periphery of the rotating shaft to which the operation knob is coupled, and the compression allowance of the O-ring is adjusted by the tightening state of the nut so that the load applied to the rotating shaft can be adjusted. It has become.

[0005]

However, in the configuration described in the above publication, the weight (torque) of the turning operation force of the operation knob can be adjusted by the tightening degree of the nut. The relationship between the torque and the friction with the rotating shaft is not uniform, and even if the nut is tightened in the same manner, the torque value of the operation knob fluctuates, so that it was difficult to set the torque value to a predetermined value.

Therefore, when performing adjustment work in a factory or the like,
The torque value of the operation knob differs for each product, and it is difficult to make the torque value of the operation knob constant for each product. Furthermore, it is necessary to adjust the torque value of the operation knob for each product, and when mass-producing a device in which a large number of operation knobs are arranged, there is a problem that the adjustment takes time and production efficiency is reduced. .

Accordingly, an object of the present invention is to provide an operation knob load applying mechanism which solves the above problems.

[0008]

The present invention has the following features to solve the above-mentioned problems. Claim 1
The described invention is characterized in that the operation amount of the operated member is changed by changing a rotation angle of the rotation shaft, the rotation shaft having one end connected to the operated member and the other end of the rotation shaft. Operating knob for adjusting the gear, and a gear unit integrally formed with the operating knob
And a damper for applying a load to the operation knob or the rotating shaft via the gear portion .

Further, the invention according to claim 2 is characterized in that the operation
The knob has a recess, and the damper is
It is characterized by being arranged in the concave portion of the knob . The invention according to claim 3 is provided in an electronic device.
The electronic device is operated by the operation knob.
A panel to be disposed, wherein the damper operates
Located in the recess of the knob and outside the panel
It is characterized by having.

[0010]

According to the first aspect of the present invention, one of the operation knobs is provided.
Since the load of the damper damper is applied to the operation knob or the rotating shaft via the body-formed gear portion , the number of parts can be reduced.
And processing man-hours can be reduced, which is
There is .

According to the second aspect of the present invention, the operation knob
Has a concave portion, and the damper is a concave portion of the operation knob.
Since it is arranged inside, it is advantageous for miniaturization of the device . According to the third aspect of the present invention, the control knob is
Is provided on the electronic device having the
Inside the recess and outside the panel
This is advantageous for downsizing the device .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a load applying mechanism according to the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a digital audio tape recorder (hereinafter referred to as "DAT") 21 to which a first embodiment of a load applying mechanism is applied, and FIG. 2 shows a state in which a top panel of the DAT 21 is removed. It is a top view.

The DAT 21 is a tape recorder used as a portable recorder, and can be carried as a shoulder by a strap (not shown) or the like. The DAT 21 is provided in the storage section 2 of the frame 22.
A magnetic recording / reproducing unit 23 having a rotating head (not shown) is attached to 2a, and a circuit board 24 is attached to a space adjacent to the storage section 22a.
When a tape cassette (not shown) is mounted in the magnetic recording / reproducing unit 23, the tape loading mechanism operates to bring the magnetic tape into sliding contact with the rotary head, thereby winding the magnetic tape and rotating the rotary head. To perform magnetic recording and reproduction.

Magnetic recording / reproducing unit 23 and circuit board 2
Above the top 4, a top panel 25 that covers them is attached. Therefore, by removing the top panel 25, the magnetic recording / reproducing unit 23 and the circuit board 24 are exposed as shown in FIG. 2, so that maintenance work for inspection and repair can be easily performed. The top panel 25 is provided with an opening 25a for mounting a tape cassette (not shown) on the magnetic recording / reproducing unit 23 and a plurality of openings 25b and 25c for projecting various operation switches (not shown). Have been.

On the front surface 22b of the frame 22, a front panel 26 and a circuit board 27 on which various switches disposed on the front panel 26 are disposed are mounted. The display panel 2 is provided on the front panel 26.
8, a volume knob 29, a right recording knob 30, a left recording knob 31, and the like.

The frame 22 has a volume shaft 32 to which a volume knob 29 is fitted, and a volume shaft 3 to which a right recording knob 30 and a left recording knob 31 are fitted.
3, 34 project forward. Further, since the right recording knob 30 and the left recording knob 31 are mounted coaxially, the volume axes 33 and 34 are also provided coaxially.

The right recording knob 30 disposed outside the left recording knob 31 is provided with a damper 35 for meshing with the right recording knob 30 to apply a load of viscous fluid to the right recording knob 30. I have. The damper 35 is a well-known damper, in which a sealed main body is filled with a viscous fluid such as oil, and a rotating body which is rotated by rotation of the right recording knob 30 is provided. It is mounted to transmit the resistance generated by the movement to the right recording knob 30.

Further, since the damper 35 is configured to apply the resistance of the viscous fluid as a load, the load generated by the viscous fluid is applied to the right recording knob 30 stably, and the variation in the load is small. In addition, since the load of the damper 35 is stable, it is not necessary to adjust the magnitude of the load, and the mounting work in the assembling process is correspondingly simplified, and labor is not required.

On the right side of the DAT 21, connectors (not shown) are provided, and holes 36a,
36b, a connector holding plate 36 fixed to the right side surface 22c of the frame 22, a hole 37a for each connector,
A side panel 37 provided with 37b is attached. Since the connector holding plate 36 is screwed to the right side surface 22c of the frame 22, it has a plurality of screw holes 36c.

On the bottom surface of the DAT 21, a bottom panel 39 and a circuit board 40 are mounted. Further, a battery storage section 41 is formed on the bottom surface of the DAT 21, and the battery storage section 41 is formed on the bottom panel 39.
An opening 42 is provided opposite to. This opening 4
2 is closed by a lid 43.

Here, the mounting structure of the right recording knob 30 as the operation knob constituting the main part of the present invention will be described. FIG. 3 shows a recording knob 30 for the right and a recording knob 31 for the left.
It is a perspective view which shows the attachment state of. Right recording knob 30
Is embedded in a circular concave portion 26 a provided on the front surface of the front panel 26, and a part of the flange portion 30 a is exposed from a notch 26 b formed on the upper side of the front panel 26. And, in the collar portion 30a of the right recording knob 30,
A rubber belt 44 for slip prevention is fitted. Therefore,
By pressing the flange 30a of the right recording knob 30 protruding from the notch 26b in the rotating direction and turning the right recording knob 30, the right recording level can be adjusted.

As described above, the flange 3 of the right recording knob 30 is provided.
Since a part of Oa is exposed above the front panel 26, for example, when recording while moving, a hand or the like may accidentally touch the flange 30a of the right recording knob 30. In this case, the right-side recording level fluctuates even during recording.

Further, since the left recording knob 31 is provided inside the right recording knob 30, the fingertip is inserted into an arc-shaped concave portion 31a formed on the front side and rotated. As described above, the left recording knob 31 provided inside the right recording knob 30 is hard to touch with a hand or the like during recording, and is prevented from being accidentally rotated.

FIG. 4 is a longitudinal sectional view showing the mounting structure of the right recording knob 30 and the left recording knob 31, and FIG.
It is a longitudinal cross-sectional view which follows the V line. The volume main body 45 is fitted in the mounting hole 22 f of the frame 22 facing the tip of the right recording knob 30, and the volume main body 45 is fixed by tightening the nut 46.

The volume main body 45 includes a right operation shaft 4.
7 and the left operating shaft 48 are provided coaxially, and the left operating shaft 48 penetrates the hollow right operating shaft 47. The right and left recording knobs 30 and 31 are provided with fitting holes 30 for the right and left recording knobs 31 and 31 on the outer periphery of the ends of the right and left operation shafts 47 and 48, respectively.
Fitting portions 47a and 48a are provided with spline-shaped projections and recesses for fitting and locking b and 31b.

The recording knob 30 for the right has a configuration in which the recording knob 31 for the left is fitted inside, so that it is formed in a hollow shape and has a small diameter inside the front panel 26. Further, a fitting hole 30 b for fitting into the fitting portion 47 a of the right operation shaft 47 is provided at the distal end of the right recording knob 30 inserted inside the front panel 26. Spline-shaped irregularities are also formed on the inner periphery of the fitting hole 30b.

Therefore, the right recording knob 30 is provided in the fitting hole 3.
By fitting 0b to the fitting portion 47a of the right operation shaft 47, the recording level set by the volume main body 45 can be adjusted. Also, the right recording knob 30
Gear 3 meshing with the gear 35a of the damper 35
0c is formed.

Therefore, the load by the damper 35 is limited to the gear 3
The signal is transmitted to the right recording knob 30 via 5a and 30c. In the present embodiment, the right recording knob 30, the damper 35,
An operation knob load applying mechanism is constituted by the gears 35a and 30c. Since the diameter of the gear 35a is larger than that of the gear 30c, the load of the damper 35 is reduced by the gear ratio between the gear 35a and the gear 30c, and the right recording knob 3
0 is transmitted.

As described above, since the load by the damper 35 is always applied to the right recording knob 30 through the gears 35a and 30c, the rotation of the right recording knob 30 requires the load of the damper 35. It is necessary to rotate the flange 30a of the right recording knob 30 with the above force. Therefore, even if the collar 30a is accidentally touched during recording, the right recording knob 30 does not rotate, thereby preventing the recording level from fluctuating. Further, even when recording while moving, the right recording knob 30 does not rotate freely due to vibration during movement, and fluctuation of the recording level due to vibration is prevented.

A rubber bush 49 formed between a right operating shaft 47 to which the right recording knob 30 is connected and a left operating shaft 48 to which the left recording knob 31 is fitted. Is interposed. Therefore, the left operation shaft 48 includes
The friction of the bush 49 is applied as a load, and the load is attached so that the load by the damper 35 is indirectly applied through the bush 49.

As described above, since the left recording knob 31 is housed inside the right recording knob 30, it is unlikely that a hand or the like will accidentally come into contact during recording. However, when recording while moving, The bush 49 is held so as not to rotate by itself due to friction. FIG. 6 shows a second embodiment of the present invention.

Since the load on the damper 51 is reduced and transmitted by the gear ratio between the gears 50a and 51a, the operation knob 50 is changed by changing the gear ratio.
Can be changed. For example, a flange 50b having a larger diameter than the above embodiment is provided at the end of the operation knob 50, and a gear is formed on the outer periphery of the flange 50b. Thus, even when the reduction ratio increases and the load on the damper 51 is small, a load of a predetermined magnitude can be applied to the operation knob 50. Therefore, when the damper 51 with a small load capacity is used, a predetermined load can be applied to the operation knob 50 by increasing the setting of the gear ratio, and when the damper 51 with a large load capacity is used, the gear ratio is set. By reducing the setting of the ratio, a predetermined load can be applied to the operation knob 50.

FIG. 7 shows a third embodiment of the present invention. When the operation knob 52 is relatively large, the operation knob 52 is attached in a state where the damper 53 is housed in a concave portion 52 a formed inside the operation knob 52. The damper 53 is attached to the panel 55 such that the gear 53a meshes with a gear 52b provided on the inner periphery of the concave portion 52a.

Since the outer periphery of the operation knob 52 is exposed, the hand or the like is easily touched during recording, so that the operation knob 52 is likely to rotate. However, the gear 52b provided on the inner periphery of the concave portion 52a and the gear 53a of the damper 53 are connected. By increasing the gear ratio, a larger load can be applied. Therefore, operation knob 5
By changing the inner diameter of the second concave portion 52a, the gear ratio can be changed to apply a predetermined load to the operation knob 52.

Further, since the damper 53 is attached to the outside of the panel 26, the operation of attaching the damper 53 can be easily performed, and the device can be made thinner than the case where the damper is provided inside the device. In the above embodiment,
Although the operation knob for adjusting the recording level of the DAT has been described as an example, the invention is not limited thereto, and the present invention can be applied to a configuration having an electric product other than the DAT or an operation knob other than the adjustment knob for the recording level.

In the above embodiment, the gear of the damper is meshed with the gear provided on the operation knob. However, the present invention is not limited to this. For example, the gear of the operation shaft to which the operation knob is fitted is provided and the operation shaft is provided. Of course, the load of the damper may be applied. Further, in the above-described embodiment, the load on the operation knob can be changed by changing the gear ratio between the gear on the operation knob side and the gear on the damper side. By changing to a different damper, the load on the operation knob may be changed to an arbitrary magnitude.

[0037]

As described above, according to the first aspect of the present invention,
Via the gear portion integrally formed with the operation knob for load Danpadan <br/> Pa is applied to the operation knob or rotation axis, section
The number of parts and processing man-hours can be reduced,
This is advantageous for reduction in

According to the second aspect of the present invention, the operation knob
Has a concave portion, and the damper is a concave portion of the operation knob.
Since it is arranged inside, it is advantageous for miniaturization of the device .

According to the third aspect of the present invention, the operation knob
Provided on an electronic device having a panel on which only
Is located in the recess of the operation knob and outside the panel.
This is advantageous for miniaturization of the device .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a digital audio tape recorder to which a first embodiment of an operation knob load applying mechanism according to the present invention is applied.

FIG. 2 is a plan view showing a state where a top panel of the digital audio tape recorder is removed.

FIG. 3 is a perspective view showing a mounting state of a right recording knob and a left recording knob.

FIG. 4 is a longitudinal sectional view showing a mounting structure of a right recording knob and a left recording knob.

FIG. 5 is a longitudinal sectional view taken along line VV in FIG.

FIG. 6 is a longitudinal sectional view of a second embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a third embodiment of the present invention.

[Explanation of symbols]

21 DAT (Digital Audio Tape Recorder) 22 Frame 23 Magnetic Recording / Reproducing Unit 24, 27, 40 Circuit Board 25 Top Panel 26 Front Panel 30 Right Recording Knob 30c Gear 31 Left Recording Knob 35 Damper 35a Gear 37 Side Panel 39 Bottom Panel 50, 52 Operation knob 51, 53 Damper

Claims (3)

(57) [Claims] A rotating shaft having one end connected to the operated member;
And connected to the other end of the rotation shaft to change the rotation angle of the rotation shaft.
Operation to adjust the operation amount of the operated member.
With a work knob,A gear unit integrally formed with the operation knob; Through the gear section Load on the operation knob or the rotating shaft
And an operation knob load applying mechanism, comprising: 2. The operating knob has a recess, and the damper is disposed in the recess of the operating knob.
Operation knob load applying mechanism according to claim 1, wherein the are. 3. The electronic control device according to claim 1, wherein the operation knob load applying mechanism includes an electronic device.
The electronic device has a panel on which the operation knob is arranged.
The damper is located within the recess of the operating knob and
3. The operation knob load applying mechanism according to claim 2, wherein the operation knob load applying mechanism is disposed outside the panel .