JP4821317B2 - Mounting structure of rotary knob - Google Patents

Description

  The present invention relates to a technique for improving operability by applying an appropriate rotational load to a rotary knob provided in an electronic device or a mechanical device.

Conventionally, rotary knobs provided in electronic devices and mechanical devices have
In order to facilitate the rotation operation, the outer diameter of the knob is increased, the length that the knob protrudes from the panel surface of the device is lengthened, or a rib-shaped protrusion is provided on the outer periphery of the knob. May be.
Although such a structure certainly facilitates the rotation operation, there arises a problem that the rotation is inadvertently caused by an external force (such as hooking on clothes) other than the operation by the user. Therefore, in order to suppress such inadvertent rotation, an appropriate rotational load may be applied to the rotary knob. For this purpose, a rotational load (friction resistance against rotation) is applied by pressing an elastic member or the like on the rotary knob or its shaft.

In Patent Document 1 (Japanese Utility Model Publication No. 3-41323), the rotary knob is exposed from the inside of the case to the outside of the case through the opening of the case, and the cylindrical portion (22 in FIG. 3) provided on the knob is connected to the cylindrical portion. The cylindrical part of the film-like seal member with the flange part integrally formed is fitted, and the rotational load is generated by using the frictional force generated in the seal member and the case opening part by the elastic contact of the flange part with the case opening part. A configuration for increasing the value is disclosed.
In Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-356441), an interposed elastic member is provided so as to surround the outer periphery of the shaft of the knob, and between the shaft and the elastic member, or on the circumferential upper side wall portion on the back surface of the elastic member and the knob. A configuration in which a rotational force is increased by generating a frictional force between members such as between is disclosed.
In Patent Document 3 (Japanese Patent Application Laid-Open No. 2004-349580), an interposing elastic member is provided so as to be in contact with a member other than the shaft body in a direction substantially perpendicular to the central axis of the knob shaft body, and a frictional force is generated between the members. A configuration for increasing the rotational load is disclosed.

Japanese Utility Model Publication No. 3-41323 JP 2004-356441 A JP 2004-349580 A

However, in the above prior art, the structure of the elastic member is complicated, so that the structure of the mold is also complicated, and there is a problem that it takes cost and labor to create the mold. Regarding the rotational load of the rotary knob, the preference for the feeling of use varies depending on the region and country where the device using it is used, so it is necessary to set the rotational load according to the preference of the user group. It is difficult to provide an elastic member that gives various rotational loads according to the preference of the user layer.
Moreover, since the attachment structure of the elastic member is complicated, there is a problem that the space required for the attachment structure cannot be reduced. Since the space cannot be reduced, there are restrictions on the design of the entire apparatus and restrictions on the size of the apparatus.

  Accordingly, the present invention has been made for the purpose of providing a structure capable of solving the above-described problem and applying an appropriate rotational load to the rotational operation of the rotary knob with a simple elastic member.

The mounting structure of the rotary knob according to claim 1 of the present invention is as follows.
In the mounting structure of the rotary knob comprising a fixed part fixed to the case of the device and a shaft configured to be rotatable relative to the fixed part,
The shaft is inserted into the insertion portion of the elastic member in which an insertion portion having a smaller diameter than the outer diameter of the shaft is formed,
In the free state, the elastic member is a sheet-like planar shape whose basic shape is a circular shape, the outer diameter is larger than the inner diameter of the concave portion, and the insertion portion having a smaller diameter than the outer diameter of the shaft is formed in the central portion. Formed,
In the recess, the elastic member is deformed into a dome shape, and the lower edge is mounted in a state of being pushed into the recess,
The rotating knob is mounted on the shaft in a state where the raised portion of the outer surface of the elastic member mounted by deforming the dome is pressed with the lower part of the rotating knob,
Friction resistance at the contact portion between the insertion portion of the central portion of the elastic member that is deformed and mounted in the dome and the shaft, and a raised portion of the outer surface of the elastic member that is deformed and mounted in the dome shape An appropriate rotational load was applied by the frictional resistance at the contact portion with the lower part of the rotary knob.
In claim 2,
On the lower edge of the elastic member, a different diameter part having a radius different from that of the other part is formed,
The concave portion is formed with an engagement structure that engages with the different diameter portion to restrict the rotation of the elastic member.

According to the rotary knob mounting structure of the first aspect of the present invention, since the structure of the elastic member is simple, the structure of the mold becomes simple even when molding with a mold, and the cost of creating the mold. The effect of saving time and labor can be obtained.
Therefore, it is also easy to provide an elastic member that gives various rotational loads according to the preference related to the feeling of use that varies depending on the region or country.
Moreover, the attachment structure of the elastic member is simplified, and an effect that the space required for the attachment structure can be reduced is obtained. For this reason, there is no restriction on the design of the entire apparatus, and the effect that the entire apparatus can be reduced in size can also be obtained.
Thus, according to the present invention, an appropriate rotational load can be applied to the rotation operation of the rotary knob with an elastic member having a simple structure.
Furthermore, since the elastic member can be manufactured by punching by making it into a sheet-like and flat shape in a free state, the manufacturing unit cost is reduced, and a general user can insert the insertion portion of the elastic member. Since it can process, it is also possible to adjust a rotational load easily and to use the elastic member according to a user's liking. Furthermore, by changing the size of the insertion portion into which the shaft is inserted, it is possible to easily change the rotational load appropriately according to the user's preference.

Below, the attachment structure and elastic member of the rotary knob concerning this invention are demonstrated in detail based on drawing which showed the embodiment.
Reference numeral 1 denotes a case of a device such as a portable transceiver. A recess 11 having a circular cross section with an inner radius r11 is formed in the attachment portion of the panel surface of the case 1, and an engagement structure 12 having an inner radius r12 (> r11) is formed on a part of the side wall of the recess 11. Is formed.
Here, the radius r <b> 12 of the engagement structure 12 is larger than the radius r <b> 11 of the recess 11, i.e., is different, and the engagement structure 12 is formed.

Reference numeral 2 denotes a rotary operation device such as a volume, which is fixed by a fixing ring nut 21 penetrating through the central portion of the bottom of the concave portion 11 of the case 1, and the shaft 22 is configured to be rotatable. Is configured to rotate.

Reference numeral 3 denotes a substantially circular sheet member as an elastic member, which is formed by an elastic member, is a sheet-like planar shape in a free state before assembly, and a basic shape is a circle having a radius r31. A hole 31 having an inner diameter d3 smaller than the outer diameter d2 of the shaft 22 is formed as an insertion portion, and a different diameter portion 32 having a radius r32 (> r31) is formed at a part of the outer edge.
The radius r32 of the different-diameter portion 32 is larger than the radius r31 of the circular portion of the sheet member, that is, is different, and a substantially sector-shaped different-diameter portion 32 is formed. The different diameter portion 32 is not limited to a fan shape, and may be any structure as long as the rotation of the sheet member can be prohibited. It can replace with a recessed part or a convex part. In some cases, the different diameter portion is not provided. In this case, the structure of the elastic member is further simplified, the manufacturing cost is reduced, the insertion into the jig at the time of assembly is simplified, and the number of man-hours can be reduced.

This sheet member 3 is obtained by punching and molding a sheet material of an elastic member such as rubber or elastomer into the shape.
A radius r31 of the circular portion of the basic shape of the sheet member 3 is formed larger than an inner radius r11 of the circular portion of the basic shape of the concave portion 11 of the case 1 (r31> r11), and the different-diameter portion 32 of the sheet member 3 is formed. The radius r32 is larger than the inner radius r12 of the engagement structure 12 of the recess 11 of the case 1 (r32> r12).
Reference numeral 4 denotes a knob that is fitted into the shaft 22 and rotated.

When the shaft 22 is inserted while the hole 31 of the sheet member 3 is expanded to the depth of the recess 11, the central portion of the sheet member 3 is a shaft as shown in the cross-sectional views of FIGS. The edge portion of the sheet member 3 is pushed to the bottom of the concave portion 11, and the outer periphery of the ring nut 21 and the inner peripheral wall of the concave portion 11 are formed at the bottom of the concave portion 11. By inserting it into the gap between the two, a dome shape as shown in FIG. 2 is obtained.
2 is a cross-sectional view taken along the line AA in the vicinity of the recess 11 in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB. 3 is a cross-sectional view including the engagement structure 12, and FIG. 2 is a cross-sectional view not including the engagement structure 12.

As shown in FIG. 2, since the inner diameter of the hole 31 of the sheet member 3 is smaller than the outer diameter of the shaft 22, the shaft 22 is inserted while the periphery of the hole 31 is elastically deformed. Therefore, the outer periphery of the shaft 22 is tightened by the elastic restoring force around the hole 31, and an appropriate rotational load is applied to the contact portion X between the sheet member 3 and the shaft 22 due to frictional resistance. It has become.
Since the outer diameter of the sheet member 3 is larger than the inner diameter of the recess 11, the sheet member 3 is pushed into the recess 11 as shown in FIGS. Assemble with.
Then, as shown in FIG. 3, the sheet member 3 is regulated and fixed so as not to rotate even if the shaft 22 rotates by fitting the outer edge of the different diameter portion 32 into the engagement structure 12.
Further, since the knob 4 is fitted into the shaft 22 and the raised portion of the sheet member 3 is pressed by the lower part of the knob 4, the knob 4 is at the contact portion Y between the lower part of the knob 4 and the sheet member 3. A frictional resistance is generated between the sheet member 3 and the sheet member 3, and an appropriate rotational load is applied.

As described above, the frictional resistance at the contact portion Y between the lower part of the knob 4 and the sheet member 3 and the shaft between the rotating part including the knob 4 and the shaft 22 and the sheet member 3 which is a non-rotating part. Since the frictional resistance is generated at the contact portion X between the outer periphery 23 of 22 and the periphery of the hole 31 of the sheet member 3, an appropriate rotational load is applied, and inadvertent rotation is prevented.
Further, since the rotational load can be increased or decreased by adjusting the inner diameter of the hole 31 of the sheet member 3 or the like, it is easy for the user to adjust the rotational load to the user's preference.

Also, the rotational load can be adjusted by adjusting the pressure with the sheet member 3 by adjusting the depth at which the knob 4 is fitted. Even if the sheet member 3 is removed, the function other than the rotational load is not affected at all, so that it can be easily applied to a waterproof structure.
In addition, the sheet member 3 can be easily manufactured without being restricted by material, sheet thickness, hardness, color, etc. by punching or cutting an elastic member such as rubber or elastomer on the sheet. By appropriately selecting the material, size, etc., it can be manufactured at a low cost and a user's preferred operational feeling can be obtained.

As described above, according to the present invention, it is possible to reliably give an appropriate rotational load with a simple structure and an inexpensive member, and it is also possible for the user to easily adjust the rotational load. In addition to the effects, the following effects can also be obtained.
-Since it is not configured to apply rotational load using grease, etc., it is not easily affected by temperature changes.
As the structure for stopping the rotation of the sheet member 3, it is only necessary to provide the engagement structure 12, and a space-saving configuration is possible.
Since the gap between the knob 4 and the recess 11 is covered with the sheet member 3, the ring nut 21 at the base of the shaft 22 is not visible from the outside, and the texture of the device is improved.
-The user can easily adjust the rotational load by adjusting the diameter of the insertion portion of the seat member.
・ As in this embodiment, a sheet-like member with an elastic member in a free state can be manufactured by punching a flat sheet member. There is no cost or effort to create.
Since various rotational loads can be easily set by adjusting the diameter of the insertion portion of the sheet member, an elastic member that can obtain a rotational load according to the preference of the user layer can be provided at low cost.

  In Example 1, as shown in FIG. 1, the elastic member is a sheet-like and planar sheet member 3 in a free state before assembly, and the hole 31 as the insertion portion is a circular hole. In addition to the above effects, the hole 31 is less deteriorated and damaged, and the durability is excellent.

  In Example 2, as shown in FIG. 4, the elastic member is a sheet-like and planar sheet member 3B in a free state before assembly, and an X-shaped cut 33 is provided as an insertion portion in the center portion. By inserting the shaft while expanding the notch 33, an appropriate frictional resistance is generated between the peripheral portion of the notch 33 and the outer periphery of the shaft. In the case of the second embodiment, in addition to the effect of the first embodiment, there is an effect that the processing becomes easy.

As Example 3, as shown in FIG. 5, the elastic member 3C is formed of an elastic member so that the basic shape becomes a dome shape in a free state before assembly, and the outer diameter of the shaft is formed on the top of the dome. The insertion portion 34 having a smaller diameter is formed, and the outer diameter of the lower edge is formed larger than the inner diameter of the recess 11.
Since the inner diameter of the insertion portion 34 is smaller than the outer diameter of the shaft, the insertion portion 34 is elastically deformed and the shaft is inserted. The shaft 22 is tightened by the insertion portion 34, and an appropriate rotational load is applied between the elastic member 3C and the shaft by frictional resistance.
Further, the knob 4 is fitted on the shaft, and the raised portion of the elastic member 3C is held by the lower part of the knob 4. In this portion, there is a frictional resistance between the knob 4 and the elastic member 3C. It is generated and an appropriate rotational load is applied.
Further, when the lower edge of the elastic member 3C is formed with a different diameter portion 35 having a radius different from that of the other portion and assembled, as shown in FIG. 3, the engagement structure 12 formed in the recess 11 is formed. It is good to comprise so that it may engage, and the rotation of an elastic member may be controlled.
Since this elastic member 3C has a dome shape in a natural state, an effect that it is easy to attach and assemble to the shaft can be obtained.

Example 4 may be an elastic member in which different diameter portions are not formed, like the sheet member 3D shown in FIG.
Even in this case, since the outer diameter of the sheet member 3D is larger than the inner diameter of the recess 11, the sheet member 3D is pushed into the recess 11 as shown in FIG. 2 while being elastically deformed and contracted. Assemble with. Therefore, the elastic restoring force causes the sheet member 3D to bulge outward at a position facing the engagement structure 12, and the rotation of the sheet member 3D is prohibited / restricted by engaging with the engagement structure 12. .
Further, since the insertion portion of the sheet member 3D is smaller than the outer diameter of the shaft 22, the outer periphery of the shaft 22 is tightened by the elastic restoring force of the insertion portion, and the friction between the sheet member 3D and the shaft 22 is caused by frictional resistance. An appropriate rotational load is applied. The insertion part may be a circular hole or a cross.
Further, since the knob 4 is fitted into the shaft 22 and the raised part of the sheet member 3D is pressed by the lower part of the knob 4, the friction resistance between the knob 4 and the sheet member 3D is maintained in this part. Has occurred and a moderate rotational load is applied.
In this way, an appropriate rotational load is added and an excellent feeling of use is obtained.
In the case of the fourth embodiment, in addition to the effects of the first and second embodiments, since there is no different diameter portion, a simpler shape is obtained. Accordingly, since the sheet member 3D has no directionality, it is easy to mount the sheet member on the apparatus using a jig, and it is easy to insert the jig into the jig when assembling, thereby reducing the number of man-hours.

In Example 5, as shown in FIG. 7, the elastic member 3E is formed of an elastic member so that the basic shape is a dome shape in a free state, and the top of the dome has a smaller diameter than the outer diameter of the shaft. The insertion part 36 is formed, and the outer diameter of the lower edge is formed larger than the inner diameter of the recess 11.
Since the inner diameter of the insertion portion 36 is smaller than the outer diameter of the shaft, the insertion portion 36 is elastically deformed and the shaft is inserted. The shaft 22 is tightened by the insertion portion 36, and an appropriate rotational load is applied between the elastic member 3E and the shaft by frictional resistance.
Further, since the outer diameter of the lower edge is larger than the inner diameter of the recess 11, the lower edge is pushed into the recess 11 and assembled as shown in FIG. 2 while being elastically deformed and contracted. Thus, the elastic restoring force causes the sheet member 3E to swell outward at the position facing the engagement structure 12, and the rotation of the sheet member 3E is prohibited / restricted by engaging with the engagement structure 12. .
In addition, since the knob 4 is fitted on the shaft and the raised portion of the elastic member 3E is pressed by the lower part of the knob 4, there is a frictional resistance between the knob 4 and the elastic member 3E. It is generated and an appropriate rotational load is applied.
In the case of the fifth embodiment, in addition to the effects of the third embodiment, a different diameter portion is not required, and thus a simpler shape is obtained. Accordingly, since the elastic member 3E has no directionality, it is easy to mount the elastic member 3E on the apparatus using the jig, and it is easy to insert the jig into the jig during assembly, thereby reducing the number of man-hours.

The attachment structure and the elastic member of the rotary knob of the present invention can be widely used for rotary knobs of electronic devices, electric devices, electric devices, mechanical devices, and the like.

It is a disassembled perspective view of the principal part of embodiment (Example 1) of the attachment structure of a rotary knob concerning this invention, and an elastic member. It is AA sectional view taken on the line of the said attachment structure. It is a BB line sectional view of the attachment structure. It is a disassembled perspective view of the principal part of Example 2 of the attachment structure of the rotary knob concerning this invention. It is a perspective view of the elastic member of Example 3 concerning this invention. It is a top view of the elastic member of Example 4 concerning this invention. It is a perspective view of the elastic member of Example 5 concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 11 Concave part 12 Engagement structure 2 Rotation operation device, rotary knob 22 Shaft 3 Sheet member, elastic member 31 Hole, insertion part 32, 35 Different diameter part 34, 36 Insertion part 4 Knob 3B Sheet member, elastic member 3C Domed elastic member 3D Sheet member, elastic member 3E Domed elastic member

Claims (2)

In the mounting structure of the rotary knob comprising a fixed part fixed to the case of the device and a shaft configured to be rotatable relative to the fixed part,
In the mounting portion of the rotary knob of the case, a recess is formed in which the basic shape of the cross section is formed in a circle around the attached shaft,
The shaft is inserted into the insertion portion of the elastic member in which an insertion portion having a smaller diameter than the outer diameter of the shaft is formed,
In the free state, the elastic member is a sheet-like planar shape whose basic shape is a circular shape, the outer diameter is larger than the inner diameter of the concave portion, and the insertion portion having a smaller diameter than the outer diameter of the shaft is formed in the central portion. Formed,
In the recess, the elastic member is deformed into a dome shape, and the lower edge is mounted in a state of being pushed into the recess,
The rotating knob is mounted on the shaft in a state where the raised portion of the outer surface of the elastic member mounted by deforming the dome is pressed with the lower part of the rotating knob,
Friction resistance at the contact portion between the insertion portion of the central portion of the elastic member that is deformed and mounted in the dome and the shaft, and a raised portion of the outer surface of the elastic member that is deformed and mounted in the dome shape A structure for attaching a rotary knob, characterized in that an appropriate rotational load is applied by a frictional resistance at a contact portion with a lower part of the rotary knob. On the lower edge of the elastic member, a different diameter part having a radius different from that of the other part is formed,
The rotating knob mounting structure according to claim 1, wherein an engagement structure that engages with the different diameter portion and restricts rotation of the elastic member is formed in the recess.

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