JPH06236801A - Decelerating driver - Google Patents

Abstract

PURPOSE:To provide a decelerating driver wherein the adjusting shaft of devices to be adjusted of various types from a one-turn adjustment type up to a multiturn adjustment type is turned and the shaft can be adjusted fine. CONSTITUTION:A decelerating mechanism 3 which is provided with a planet-gear mechanism composed of a sun gear 31, a planet gear 32 and an internal gear 33 and which is provided with an idling clutch function when an excessive load is applied and a driver bit 4 which is connected to the decelerating mechanism 3 and which is constituted so as to be retreated to the shaft direction when a prescribed load is applied to the shaft direction are installed. In addition, a holder 1 which houses the decelerating mechanism 3 and the driver bit 4 and which holds the internal gear 33 constituting the decelerating mechanism 3 so as not to be turned and a rotation-preventing member 5 which is coupled to or abuts on the body or the like of a device 7 to be adjusted and which prevents the holder 1 from being turned with reference to the device to be adjusted are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deceleration driver for rotating an adjusting shaft of an electronic mechanism part (device to be adjusted) such as a trimmer potentiometer to adjust it so as to meet a predetermined condition.

[0002]

2. Description of the Related Art Electronic mechanism parts (devices to be adjusted) are
For example, as represented by a trimmer potentiometer, there is a trimmer potentiometer that adjusts to a necessary condition (circuit condition or the like) by rotating an adjustment shaft using a driver.

As a driver for rotating the adjustment shaft of the device to be adjusted and performing the adjustment, a commercially available minus or plus general-purpose driver or a special driver dedicated to each device to be adjusted is used. In some cases, it is not always easy to make fine adjustments.

Therefore, in order to facilitate this adjustment, the device to be adjusted includes a one-rotation adjustment type device to be adjusted by rotating the adjustment shaft within a range of one rotation, and a plurality of adjustment shafts. Both a multi-rotation adjustment type device to be adjusted which is adjusted by rotating it are prepared, and the number of adjustment rotations thereof is properly used depending on the corresponding condition.

As an example, in the case of a trimmer potentiometer, a trimmer potentiometer starting from a one-rotation adjusting type is selected from 2, 3, 4, 1
Various types such as multi-rotation adjusting type such as 1, 15, 18, 22, 25 and 25 rotation adjusting type are prepared, and an appropriate one is selected and used from these according to need.

[0006]

However, in the above-mentioned conventional method, it is necessary to purchase various electronic mechanism parts (devices to be adjusted) according to the circuit to be used or the production plan and to manage the inventory. There is a problem that the cost increases.

The present invention solves the above problems, and fine adjustment can be performed by rotating the adjustment shaft of various types of devices to be adjusted, from the one-rotation adjusting type to the multi-rotation adjusting type. The purpose is to provide a deceleration driver.

[0008]

In order to achieve the above-mentioned object, a reduction gear driver of the present invention is a reduction gear driver for rotating an adjustment shaft of an electronic mechanism component (device to be adjusted). And a planetary gear mechanism consisting of an internal gear, which reduces the given rotation, and which is configured to idle when an overload is applied, and a reduction mechanism connected to the reduction mechanism, which is connected to the axial direction. Is configured to retract in the axial direction when a predetermined load is applied, and accommodates the driver bit that engages with the adjustment shaft of the device to be adjusted and rotates it, and the reduction mechanism and the driver bit, A holder that holds the internal gear that constitutes the speed reduction mechanism so that it does not rotate, and a holder that engages or abuts the body of the device to be adjusted. Chromatography is characterized by comprising a rotation preventing member to prevent rotation relative to the adjustment device.

[0009]

By preventing the rotation of the holder by the rotation preventing member, the rotation of the internal gear that constitutes the speed reduction mechanism held by the holder is prevented, and the speed reduction mechanism utilizing the planetary gear mechanism functions reliably to provide The rotation thus performed is decelerated at a predetermined rate. Therefore, it becomes possible to finely tune the low-rotation adjustment-type adjusted device of the one-rotation adjustment type or the multi-rotation adjustment type, such as a medium-rotation adjustment type or multi-rotation adjustment type adjusted device. One deceleration driver can be used for various types of devices to be adjusted from the one-turn adjusting type to the multi-turn adjusting type, and the ease of adjustment can be greatly improved.

Further, when a predetermined load is applied in the axial direction when the driver bit is engaged with the adjustment shaft of the device to be adjusted, the driver bit retracts in the axial direction and an excessive load is applied to the speed reducing mechanism. When (torque) is applied, it is possible to reliably prevent the device to be adjusted, the driver bit, the adjustment mechanism portion, and the like from being damaged by the speed reducing mechanism idling.

Further, by making the rotation preventing member detachable, it becomes possible to replace it with a rotation preventing member having a shape corresponding to the shape of the body of the device to be adjusted, and also to prevent damage or wear. In that case, it becomes possible to replace it with a new one, and it is possible to reliably maintain the function as a driver.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view showing an essential part of a reduction gear driver according to an embodiment of the present invention, FIG. 2 is a partially cutaway sectional view showing an essential part of a reduction gear mechanism, and FIG. 3 is an embodiment of the present invention. It is a side view which shows a deceleration driver.

As shown in FIGS. 1 to 3, in the deceleration driver of this embodiment, the tip portion 2a of the driver shaft 2, the deceleration mechanism 3, the driver bit 4, etc. are housed in the holder 1, and further, An annular rotation prevention member 5 made of, for example, hard rubber is detachably attached to the tip of the holder 1.

The reduction mechanism 3 is formed on the sun gear 31, which is formed at the tip of the driver shaft 2, a planetary gear 32 which meshes with the sun gear 31, an internal gear 33 which meshes with the planetary gear 32, and a planetary gear 32. And a rotor 34 having a concave portion 34a that engages in a detachable manner. The internal gear 33 is held in the holder 1 so as not to rotate, and also functions as a rotation guide for the rotor 34 and the driver bit 4.

The surface of the rotor 34 facing the driver shaft 2 is, as shown in FIG. 4, the planetary gear 3 described above.
Concave portion 34a engaging with the convex portion 32a of the second driver shaft 2
Is formed with an engaging hole 34b that engages with the tip end portion 2a, and on the surface facing the driver bit 4, as shown in FIG. 5, two rotor pins (projections) 34c and
Adjust the driver bit 4 to the device to be adjusted 7 (of the adjusting shaft 7a)
A recess 34d for accommodating the spring 6 for biasing in the direction of is formed. The number of rotor pins 34c is not limited to two, and three or more rotor pins 34c may be provided, and there are no particular restrictions on the arrangement position. It is also possible to use a rubber-like elastomer instead of the spring 6 described above.

Further, as shown in FIG. 6, an engaging groove 4a for engaging the rotor pin 34c and a recess 4b for accommodating the spring 6 are formed on the surface of the driver bit 4 facing the rotor 34. . The shape and the arrangement pattern of the engagement groove 4a are not limited to this, and the rotor 3
It is also possible to form a plurality of engagement grooves at a predetermined angle so as to correspond to the shape and the arrangement position of the rotor pin 34c of No. 4 described above. Further, on the surface of the driver bit 4 facing (the adjustment shaft 7a of) the device to be adjusted 7, as shown in FIG. 7, the engagement protrusion 4 that engages with the adjustment groove 7b of the adjustment shaft 7a.
c is formed.

As shown in FIG. 1, the rotor pin 34
Between the tip of c and the bottom of the engaging groove 4a, the rotor 34
A gap G is formed so that the driver bit 4 can move in the axial direction. This gap G is for the driver bit 4
When a rotational overload is applied to the rotor 34, the rotor 34 and the convex portion 32a of the planetary gear 32 can be engaged and disengaged, which also contributes to the functioning of the clutch mechanism.

Next, the operation of rotating the adjustment shaft of the device to be adjusted using the deceleration driver configured as described above will be described.

When the rotation preventing member 5 is engaged with the main body of the device 7 to be adjusted and the holder 1 is not rotated (that is, the internal gear 33 is fixed) and the driver shaft 2 is rotated, the sun gear 31 is rotated. The planetary gear 32 rotates and revolves around its axis.

Then, the revolution of the planetary gear 32 is changed by the convex portion 3 thereof.
It is transmitted to the rotor 34 via 2a. The rotation of the rotor 34 is transmitted to the driver bit 4 via the rotor pin 34c, and the adjustment is performed by rotating the adjustment shaft 7a of the device to be adjusted 7 at a decelerated predetermined speed.

In the deceleration driver of this embodiment, the number of teeth of the sun gear is a and the number of teeth of the internal gear is b.
Then, the revolution number of the planetary gear 32 is a value obtained by the equation: a / (a + b) (1). That is, the driver shaft 2
(That is, the sun gear 31) The rotation speed of the adjusting shaft 7a is reduced to a / (a + b) rotations per one rotation.

The step of engaging the engaging projection 4c on the tip side of the driver bit 4 with the adjusting groove 7b of the device to be adjusted 7 (that is, the engaging projection 4c of the driver bit 4 is fitted into the adjusting groove 7b). In the stage before the operation, a load is applied in the axial direction (the direction of arrow A), and the driver bit 4 overcomes the urging force of the spring 6 and retreats toward the rotor 34 (it can retreat by the distance of the gap G). Therefore, the engagement protrusion 4c of the driver bit 4 and the adjustment groove 7b can be efficiently engaged by the search rotation without damaging the adjustment shaft 7a of the device to be adjusted 7 and the like. That is, when the engaging protrusion 4c reaches the position where it engages with the adjusting groove 7b, the driver bit 4 is pushed toward the device to be adjusted 7 side by the urging force of the spring 6, and the engaging protrusion 4c moves to the adjusting groove 7b. Get in.

Further, in the deceleration driver of the above-mentioned embodiment, the driver bit 4 is operated as in the case where the adjustment shaft 7a of the device to be adjusted 7 is rotated to the end of the rotation where the stopper is provided and the stopper works. When an excessively large rotation blocking force (overload) acts on the rotor 34, the rotor 34 retracts to the driver bit 4 side (it can retract by the distance of the gap G), and the convex portion 32a of the planetary gear 32 and the rotor 34.
The engagement with the recessed portion 34a is released and the clutch mechanism functions, so that the adjustment mechanism portion of the device to be adjusted 7 and the reduction mechanism 3 are not damaged.

Further, as described above, the internal gear 33
The anti-rotation member 5 having the function of preventing the rotation is configured to be attachable / detachable. Therefore, depending on the shape of the main body of the device 7 to be adjusted, the anti-rotation member 5 may be replaced with an anti-rotation member having a corresponding shape. It is possible and can be replaced with a new one if it becomes damaged or worn.

The material for forming the rotation preventing member 5 has a certain degree of compatibility (deformability) with the shape of the main body of the device to be adjusted 7 and can prevent rotation of the holder 1. Therefore, it is preferable to use a material such as hard rubber having a large friction coefficient and having a certain degree of deformability (elasticity). However, when using the rotation preventing member having a shape corresponding to the shape of the main body of the device to be adjusted, it is not required that the material has the above-mentioned conditions. It is preferable that the material forming the rotation preventing member 5 is an electrical insulator.

When the holder 1, the internal gear (rotation guide) 33, and the rotation preventing member 5 are made of a transparent material, the step of first engaging the engaging protrusion 4c of the driver bit 4 with the adjusting groove 7b, Since the engaging portion can be visually observed in the step of rotating the driver shaft 2 to perform the adjustment, the adjustment can be facilitated.

The present invention is not limited to the above embodiment in other respects, and various applications and modifications can be made within the scope of the gist of the invention.
For example, the holder 1 and the internal gear 33 may have an integrated structure in which the tip portion of the driver shaft 2 is insert-molded.

[0028]

As described above, the deceleration driver of the present invention decelerates and rotates the driver bit by rotating the driver shaft, and the deceleration mechanism that idles when an overload is applied and the axial direction. On the other hand, when a predetermined load is applied, a driver bit configured to retract in the axial direction, a holder that holds the reduction mechanism and the driver bit, and the holder of the body of the device to be adjusted are engaged or abutted. Since it is configured with a rotation preventing member that prevents rotation of the device to be adjusted, the given rotation is decelerated at a predetermined rate, and the single rotation adjustment type is finely adjusted by multi-rotation adjustment. In addition, the multi-rotation adjustment type can be finely adjusted by multi-rotation adjustment with a higher number of revolutions, which can improve the degree of freedom in circuit design and It is possible to rationalize production and to facilitate the management of procurement and inventory as compared with the case of preparing a class electronic mechanical parts (adjustable device).

When a certain amount of load is applied in the axial direction when engaging with the adjustment shaft of the device to be adjusted, the driver bit retracts in the axial direction, and an excessive load (torque) is applied to the reduction mechanism. ), The deceleration mechanism idles, so that it is possible to reliably prevent the device to be adjusted, the adjustment mechanism portion, and the like from being damaged.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a main part of a reduction driver according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view showing a main part of a reduction mechanism of a reduction driver according to an embodiment of the present invention.

FIG. 3 is a side view showing a deceleration driver according to an embodiment of the present invention.

FIG. 4 is a perspective view showing one main surface side of a rotor of the deceleration driver according to the embodiment of the present invention.

FIG. 5 is a perspective view showing the other main surface side of the rotor of the deceleration driver according to the embodiment of the present invention.

FIG. 6 is a perspective view showing one main surface side of a driver bit of a reduction driver according to an embodiment of the present invention.

FIG. 7 is a perspective view showing the other main surface side of the driver bit of the deceleration driver according to the embodiment of the present invention.

[Explanation of symbols]

1 Holder 2 Driver shaft 3 Reduction mechanism 4 Driver bit 4a Engagement groove 5 Anti-rotation member 6 Spring 7 Device to be adjusted 7a Adjustment shaft 7b Adjustment groove 31 Sun gear 32 Planetary gear 32a Planetary gear projection 33 Internal gear (rotation guide) 34 rotor 34a recessed portion 34c rotor pin (projection)

Claims (1)

[Claims] 1. A deceleration driver for rotating an adjustment shaft of an electronic mechanism component (device to be adjusted), comprising a planetary gear mechanism including a sun gear, a planetary gear, and an internal gear, and decelerating a given rotation. A speed reduction mechanism configured to idle when an overload is applied, connected to the speed reduction mechanism, and configured to retract in the axial direction when a predetermined load is applied in the axial direction, A driver bit that engages with the adjustment shaft of the device to be adjusted and rotates it, and stores the speed reduction mechanism and the driver bit,
A holder that holds the internal gear that constitutes the reduction mechanism so as not to rotate, and a rotation prevention member that engages or abuts the body of the device to be adjusted to prevent the holder from rotating with respect to the device to be adjusted. A deceleration driver, comprising: