JP3241207U - rotary dial - Google Patents

Abstract

A rotary dial suitable for a plurality of manual rotary shafts with a slight diameter difference is provided. A rotary dial (1000) grips the outer circumference of a manual rotary shaft of the rotary dial with tightening claws inserted into a guide support cylinder, thereby transmitting a rotary force to the manual rotary shaft or rotating the amount of rotation. It transmits power to the dial, and the tightening pawl has a tapered surface that gradually increases in diameter toward one end. At the end, a hole into which a manual rotating shaft can be inserted, and a hole that reaches the hole from the outer periphery. A plurality of pawls formed by a plurality of slits are provided, and the tightening pawls inserted into the guide and support cylinder are pulled toward the other end of the guide and support cylinder by the pulling means, thereby tightening the tapered surfaces in the inner circumferential direction and mutually tightening the pawls. bring closer. [Selection drawing] Fig. 1

Description

The present invention relates to a rotary dial that indicates the amount of rotation of a manual rotary shaft in a device such as a potentiometer.

In the multi-dial of Non-Patent Document 1, 6.35 mm (0.25 inch), 6 mm, 4 mm, 3.175 mm (0.125 inch), and 3 mm are prepared as the diameter of the manual rotation shaft for the same model (MB type). Therefore, a dial knob that matches the diameter of each rotating shaft was required.
Similarly, in the dial knob described on page 5 of Non-Patent Document 2, there are two types of rotating shaft diameters of 6 mm and 1/4 inch.

In this way, one of the reasons why there are multiple rotating shafts of the same model is that both meters and inches are used as units for length in equipment design. However, if a 6.35 mm dial knob is attached to a 6 mm rotating shaft, rattling occurs and the rotating shaft does not rotate smoothly.

However, with the growing momentum of SDGs in recent years, the inventor thought that it should be avoided as much as possible to produce parts of the same system with different hole sizes.

Sakae Tsushin Kogyo Co., Ltd. catalog excerpt

Ritel Ltd. company catalog "Drehkopf-Program"

The problem to be solved is that in rotary dials, different parts (such as dial knobs) are used for multiple manual rotary shafts with subtle diameter differences, which wastes resources and labor. .

The rotary dial according to claim 1 of the present invention grips a manual rotary shaft of a device with a collet-like tightening structure, and the tightening structure has a tapered surface on the outer circumference that decreases in diameter from one end to the other end. a hole drilled from the one end to the other end into which the manual rotating shaft of the device can be inserted; and a depth cut from the one end to the other end to reach the hole from the outer circumference. a tightening claw having a plurality of claws formed by forming a plurality of slits in the circumferential direction; and a hole into which the tightening claw is inserted from the one end, the inner circumference of the one end being on the tapered surface. a guiding support cylinder that tightens the claws in a direction in which the claws approach each other when the tightening claws are displaced toward the other end; and a pulling means that pulls the tightening claws toward the other end. . As a result, the diameter of the rotating shaft that can be gripped can be given a degree of freedom, and the integration of product types can be achieved.

In the rotary dial according to claim 2 of the present invention, a male thread is formed on the outer periphery of the tightening pawl from the other end toward the one end, and the traction means is a nut screwed onto the male thread of the tightening pawl. and pulls the tightening pawl toward the other end by tightening the nut.

In the rotary dial according to claim 3 of the present invention, the tightening claw is formed with a female thread from the other end to the one end, and the pulling means is a male screw that is screwed into the female screw of the tightening claw. By tightening the male screw member, the tightening pawl is pulled toward the other end.

In the rotary dial according to claim 4 of the present invention, a hollow shaft is gripped by the tightening structure, a manual rotation shaft of a device separate from the device of the hollow shaft is inserted through the hollow shaft, and A second knob is attached and fixed to a portion protruding from the traction means of the second manual rotary shaft penetrating the traction means.
That is, a second manual rotating shaft is inserted and penetrates through the pulling means, and a second knob is attached and fixed to a portion of the second manual rotating shaft protruding from the pulling means. ing.
Intuitive operation can thereby be obtained by arranging different devices in series and allowing manual operation for each axis of rotation. Devices arranged in series are assumed to be a potentiometer and a rotary switch, a potentiometer and a potentiometer, or a potentiometer and a rotary encoder.

In the rotary dial according to claim 5 of the present invention, the tightening structure is provided on the second knob, and the second knob is attached and fixed to the second manual rotary shaft by the tightening structure. This allows for multiple second manual rotation axes.

In the rotary dial according to claim 6 of the present invention, the hole of the guide support cylinder is provided with a tapered surface having the same inclination angle as that of the tapered surface of the tightening claw, and the guide support cylinder is attached to the tightening claw on this tapered surface. come into contact with As a result, the friction between the tightening claws and the guide support cylinder is reduced, the load of the pulling operation by the pulling means is reduced, and the durability of the tightening structure can be improved.

A single rotary dial can accommodate multiple manual rotation axes.

1 is a front view showing a state in which Embodiment 1 of the rotary dial according to the present invention is attached to a potentiometer; FIG. FIG. 2 is a plan view of the mounted state of FIG. 1; FIG. 2 is a bottom view of the attached state of FIG. 1; 2 is a front view of a knob in the rotary dial of FIG. 1; FIG. 5 is a plan view of the knob of FIG. 4; FIG. 5 is a bottom view of the knob of FIG. 4; FIG. FIG. 5 is a longitudinal sectional view of the knob of FIG. 4; FIG. 2 is a front view of a guide support tube in the rotary dial of FIG. 1; FIG. 9 is a plan view of the guide support cylinder of FIG. 8; FIG. 9 is a bottom view of the guide support tube of FIG. 8; FIG. 2 is a front view of a tightening pawl in the rotary dial of FIG. 1; FIG. 12 is a plan view of the clamping pawl of FIG. 11; 12 is a bottom view of the clamping pawl of FIG. 11; FIG. FIG. 14 is a longitudinal cross-sectional view showing a tightening structure by the tightening claws, the guide support cylinder and the pulling means of FIGS. 8 to 13; 1. It is a front view which sees through and shows a clamping structure in the mounting state of FIG. FIG. 2 is a front view showing an exploded mounting state of FIG. 1; FIG. 10 is a front view showing a state in which the second embodiment of the rotary dial according to the present invention is attached to a device; FIG. 18 is a front view showing the tightening structure in the mounted state of FIG. 17 in a see-through manner; FIG. 18 is a front view of a knob in the rotary dial of FIG. 17; FIG. 20 is a plan view of the knob of FIG. 19; Figure 20 is a bottom view of the knob of Figure 19; FIG. 20 is a longitudinal sectional view of the knob of FIG. 19; 18 is an exploded front view showing the mounted state of FIG. 17; FIG. FIG. 10 is a vertical cross-sectional view showing a state in which Example 3 of the rotary dial according to the present invention is attached to a device; FIG. 25 is a vertical cross-sectional view showing an exploded tightening structure in the rotary dial of FIG. 24; 26 is a front view showing tightening in the tightening structure of FIG. 25; FIG. FIG. 5 is a longitudinal sectional view showing Embodiment 4 of the rotary dial according to the present invention;

Next, preferred embodiments of the rotary dial according to the present invention will be described with reference to the drawings.

1 to 3 and 15 show a state in which rotary dial 1000 is attached to potentiometer 2000, and rotary dial 1000 is attached to manual rotary shaft 2100A of potentiometer 2000. FIG. Potentiometer 2000 outputs the amount of rotation of manual rotary shaft 2100A from terminal 2200 as an electrical signal. Note that the potentiometer 2000 is fixed to the panel 4000 or the like and does not rotate with the rotation of the manual rotary shaft 2100A.

The dial 1000 has a dial body 1100 into which a rotating shaft 2100A is inserted and fixed. The dial body 1100 is provided with a rotating mechanism 1110 for rotating the rotating shaft 2100A and a display mechanism 1120 for displaying the amount of rotation of the rotating shaft 2100A. ing. Furthermore, the dial 1000 has a knob 1200A (FIGS. 4 to 7) fitted and fixed to the dial main body 1100. When the knob 1200A is rotated, the rotating mechanism 1110 rotates the rotating shaft 2100A and rotates the rotating shaft 2100A. The display mechanism 1120 is rotationally driven in synchronization with . Note that the dial body 1100 is fixed to the panel 4002 or the like and does not rotate with the rotation of the rotating shaft 2100A.

The display mechanism 1120 has a conical rotation angle dial 1121, and the rotation angle dial 1121 is rotated by the rotation of the knob 1200A. The dial 1121 is provided with graduations obtained by equally dividing one rotation of 360 degrees of the knob 1200A into 100. A conical rpm dial 1122 is provided on the outer periphery of the dial 1121 to count and indicate the number of rotations per rotation of the dial 1121 .

The dial body 1100 is further provided with a lock lever 1130 for locking and fixing the rotation mechanism 1110 so that the rotation of the rotation shaft 2100A and the display mechanism 1120 can be fixed.

FIGS. 1, 15, and 16 show a collet-like clamping structure 1300A (FIGS. 8 to 14) for clamping and fixing the rotary shaft 2100A in the dial body 1100 with the rotary dial 1000 attached to the potentiometer 2000. show. The tightening structure 1300A includes a substantially cylindrical guide support tube 1310A (FIGS. 8 to 10), a substantially cylindrical tightening claw 1320A (FIGS. 11 to 13) inserted from one end 1311 of the guide support tube 1310A, A pulling means 1340A for pulling the tightening claw 1320A toward the other end 1312 of the guide support cylinder 1310A is provided. The rotating shaft 2100A has its distal end portion 2110 inserted into the hole 1321 (FIG. 12) of the tightening claw 1320A.

A tapered surface 1325 having a smaller diameter from one end 1323 to the other end 1324 is formed on the outer circumference of one end 1322 (FIG. 11) of the tightening claw 1320A. 10).

The tightening claw 1320A is cut from one end 1323 toward the other end 1324, and is formed with four slits 1327 extending from the outer periphery to the hole 1326 in the circumferential direction, thereby forming a plurality of claws 1328. ing. When the tightening claw 1320A is pulled toward the other end 1312 of the guide support cylinder 1310A by the pulling means 1340A, the tapered surface 1325 is pressed against the inner circumference of the one end 1311 of the guide support cylinder 1310A, and the four claws 1328 are directed inward. to deform. As a result, rotating shaft 2100A is gripped by claws 1328 and firmly fixed to rotating mechanism 1110 of dial main body 1100 .
At this time, since the rotating shaft 2100A is pressed by the four claws 1328 evenly arranged around it, it is not subject to local pressing force, and problems such as wear, deformation, and damage may occur. The durability is lower than the conventional method of screwing from the side.

14 to 16, the pulling means 1340A has a flat washer 1341 in contact with the other end 1312 of the guide support cylinder 1310A, and a hexagonal hole whose head is supported by the flat washer 1341 which penetrates the flat washer 1341 in the direction of one end 1311. The small screw 1342 is screwed into a female screw 1331 formed on the other end 1324 of the tightening claw 1320A. That is, by tightening the machine screw 1342, the tightening claw 1320A is pulled toward the other end 1312 of the guide support cylinder 1310A.

In Example 1, the range of deformation of the claw 1320A can be adjusted by the diameter and angle of the tapered surface 1325 and the inner diameter of the guide support tube 1310A, and can be applied to the rotary shaft 2100A with various dimensional differences. Accordingly, it can be applied to various manual rotary shafts 2100A of one type of rotary dial 1000, and resources and labor can be saved.

In FIGS. 17 to 23, the rotary dial 1000 of the second embodiment applies a tightening structure 1300A to the knob 1200B. It is inserted into the clamping structure 1300A and clamped.

In the second embodiment, one type of knob 1200B can handle a plurality of rotating shafts, so the raw materials and labor associated with the knob 1200B can be saved.

24 to 26, the rotary dial 1000 of Example 3 applies a tightening structure 1300B to the hollow shaft (hollow manual rotary shaft) 2100B of the potentiometer 2000, and the tightening structure 1300B passes through the dial body 1100. and a guide support cylinder 1310A inserted into the dial body 1100. A male thread 1329 is formed on the outer periphery of the tightening claw 1320B from the other end, and a hexagonal nut 1343 as a pulling means 1340B is screwed to a portion protruding through the dial body 1100 . The hexagonal nut 1343 is tightened by the tightening claw 1320B while being in contact with the upper surface of the dial body 1100, and pulls the tightening claw 1320B toward the other end. As a result, the tapered surface 1325 of the tightening claw 1320B is tightened by the guide support cylinder 1310A, and the claw 1328 tightens the distal end portion 2110 of the hollow shaft 2100B. This allows rotary dial 1000 to accommodate hollow shaft 2100B.
A portion of the tightening claw 1320B where the male screw 1329 is formed is a thick portion 1330 that is thicker than other portions, and the strength of the male screw 1329 is ensured.

A manual rotary shaft 3100 of the rotary switch 3000 is inserted through the hollow shaft 2100B, and a knob 1200B is attached and fixed to the portion of the manual rotary shaft 3100 protruding from the knob 1200A. The method of attaching the knob 1200B to the manual rotating shaft 3100 may be the same as in the second embodiment, or may be fixed by a set screw for precision machining or the like.

Since the rotary shaft 2100B is clamped by four claws 1328 evenly arranged around it, it is not subjected to a local pressing force compared to the conventional method of screwing from the side. , deformation, damage and other problems are unlikely to occur.

In FIG. 27, the rotary dial 1000 of Example 4 has a tapered surface 1313 formed on the inner surface of the guide support cylinder 1310B in the tightening structure 1300C, the diameter of which decreases from one end 1311 to the other end 1312. The tapered surface 1313 is equal to the inclination angle of the tapered surface 1325 of the tightening claw 1320A. This reduces the pulling load in pulling the tightening claw 1320A by the pulling means 1340A, and improves the durability of the tightening structure 1300C.

Although the above embodiments have been directed to rotary dials, it should be appreciated that rotary dials include panel mounted dials. Moreover, it goes without saying that the present invention can be applied to any manual rotary shaft.

1000 Rotary dial 1100 Dial body 1110 Rotation mechanism 1120 Display mechanism 1121 Rotation angle dial 1122 Rotation number dial 1130 Lock lever 1200A Knob (Examples 1, 3, 4)
1200B Knob (Examples 2 and 3)
1300A tightening structure (Example 1, Example 2)
1300B Tightening structure (Example 3)
1300C tightening structure (Example 4)
1310A Guide support cylinder (Examples 1, 2, 3)
1310B Guide support cylinder (Example 4)
1311 One end 1312 Other end 1313 Tapered surface (Example 4)
1320A tightening claw (Examples 1, 2, 4)
1320B Clamping claw (Example 3)
1321 Hole 1322 One end 1323 One end 1324 The other end 1325 Taper surface 1326 Hole 1327 Slit 1328 Claw 1329 Male screw 1330 Thick part 1331 Female screw 1340A Traction means (Examples 1, 2, 4)
1340B traction member (Example 3)
1341 Plain washer 1342 Hex socket machine screw 1343 Hex nut 2000 Potentiometer 2100A Manual rotary shaft (Examples 1, 2, 4)
2100B Manual rotary shaft (hollow shaft: Example 3)
2110 tip 2200 terminal 3000 rotary switch 3100 manual rotary shaft 4000, 4002 panel 5000 frame 6000 bearing

Claims (9)

An end portion having a tapered surface formed on the outer periphery that decreases in diameter from one end to the other end, a hole drilled from the one end to the other end into which a manual rotating shaft of a device can be inserted, and a hole from the one end to the other end. a tightening claw having a plurality of claws formed by forming a plurality of slits in the circumferential direction that are cut toward the end and have a depth reaching the hole from the outer circumference;
A hole into which the tightening claw is inserted from the one end, the inner periphery of the one end being in contact with the tapered surface, and when the tightening claw is displaced toward the other end, the claws move toward each other. a guide support cylinder for tightening the claw;
a pulling means for pulling the tightening claw in the direction of the other end;
A rotary dial provided with a tightening structure with A male thread is formed on the outer circumference of the tightening claw toward the one end from the other end, and the pulling means has a nut that is screwed onto the male screw of the tightening claw. By tightening the nut, 2. A rotary dial according to claim 1, wherein said tightening pawl is pulled toward the other end. A female thread is formed on the tightening claw from the other end to the one end, and the pulling means has a male screw member that screws into the female screw of the tightening claw, and tightens the male screw member. 2. The rotary dial according to claim 1, wherein the tightening pawl is pulled in the direction of the other end. said manual rotation shaft being hollow and having a second manual rotation shaft inserted therethrough of an instrument separate from said manual rotation shaft instrumentation and passing through said traction means; 3. The rotary dial according to claim 2, wherein a second knob is attached and fixed to a portion protruding from said pulling means. 5. The rotary dial according to claim 4, wherein the second knob is provided with the tightening structure, and the second manual rotary shaft is mounted and fixed by the tightening structure. 6. The guide support cylinder according to any one of claims 1 to 5, wherein the hole of the guide support cylinder is provided with a tapered surface having the same angle of inclination as the tapered surface of the tightening claw, and the guide support cylinder contacts the tightening claw at this tapered surface. Rotating dial as described. 2. The manual rotary shaft is not subjected to a local pressing force by clamping the manual rotary shaft with the tightening pawl, so that problems such as wear, deformation, and damage are less likely to occur. 7. A rotary dial according to any one of 1 to 6. 7. The rotary dial according to any one of claims 1 to 6, having a self-aligning function with respect to the manual rotary shaft by clamping the manual rotary shaft with the tightening claws. Even if the diameter of the rotating shaft to be gripped changes significantly, the knob can be used by replacing the built-in tightening claw.

Images