JP3764952B2 - Dial type switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dial-type switch, and more specifically, includes a pointing member on which a plurality of pointing positions are displayed on a circumference, and a dial rotatably supported on the pointing member, and the dial is rotated. When the mark displayed on the dial is aligned with the indicated position, the moderation member attached to the dial is aligned with the groove provided in the indicating member, so that the rotational position of the dial is maintained. Regarding switches.
[0002]
[Prior art]
Conventionally, as this type of dial switch, a switch using a sphere as a moderation member has been proposed. FIG. 4 shows a configuration of the conventional dial switch 120 as viewed from the front, and FIG. 5 shows a cross-sectional view of the dial switch 120 as viewed from the BB cross section of FIG. The dial type switch 120 of the conventional example is configured as a changeover switch for heater control of a vehicle. As shown in the figure, a switch display plate 122 on which a plurality of wind direction positions 123 are displayed and an indication mark 131 are rotated. A dial 130 that is aligned with the wind direction position 123 and a moderation mechanism 140 attached to the rotating shaft of the dial 130 are provided. The moderation mechanism 140 includes a support member 142 that rotatably supports the rotation shaft 132 of the dial 130, a rib 144 provided in an arc shape on the support member, and a cylindrical shape attached to the rotation shaft 132 of the dial 130. A cylindrical member 150 and a spherical moderation member 152 that is held by the cylindrical member 150 and receives a biasing force in the outer circumferential direction by a spring spring 154 are provided. A plurality of grooves 146 are provided in the arc-shaped rib 144. The groove 146 is formed at a position that aligns with the moderation member 152 of the moderation mechanism 140 when the indication mark 131 of the dial 130 is aligned with the wind direction position 123 of the switch display plate 122.
[0003]
Therefore, when the dial 130 is rotated, in the moderation mechanism 140, the moderation member 152 is slid or rotated while being pressed against the rib 144 by the urging force of the spring spring 154, and the indication mark 131 of the dial 130 is in any of the wind direction positions 123. When the position matches the heel, the moderation member 152 fits into the groove 146 and holds the dial 130 at that position. If a torque larger than the holding force is applied to the dial 130, the moderation member 152 is detached from the groove 146, and the dial 130 rotates again. In this way, both the rotation of the dial 130 and the holding of the dial 130 are compatible.
[0004]
[Problems to be solved by the invention]
However, in the dial type switch 120 of the conventional example, it is necessary to carry out while visually checking the rotation of the dial 130. Each part of the dial type switch 120 has some backlash due to the necessity for manufacturing and assembling, and the gap between the cylindrical member 150 and the moderation member 152 is designed to be about 0.1 mm because it is necessary to close this backlash. For this reason, the movement of the moderation member 152 is restricted by the cylindrical member 150, and the moderation sound generated by the moderation member 152 hitting the cylindrical member 150 when the moderation member 152 is fitted in the groove 146 hardly occurs. When the operator operates the dial 130, the operator can grasp the rotation position of the instruction mark 131 to some extent from the change in the operation load of the dial 130 and the rotation stroke, but cannot grasp it accurately.
[0005]
In order to deal with such problems, a method of increasing the clearance noise by increasing the gap between the moderation member 152 and the cylindrical member 150 and a method of increasing the biasing force of the spring spring 154 to increase the operating load can be considered. The former increases play and deteriorates the operational feeling, and the latter requires excessive torque to rotate the dial 130 and decreases durability.
[0006]
One of the objects of the dial switch of the present invention is to determine the rotational position of the dial without visual inspection. The dial type switch of the present invention has an object to improve the operational feeling.
[0007]
[Means for solving the problems and their functions and effects]
The dial switch according to the present invention employs the following means in order to achieve at least a part of the above-described object.
[0008]
The dial-type switch of the present invention includes a switch display board on which a plurality of indication positions are displayed on the circumference and a dial pivotally supported by a support member , and the dial is rotated to display on the dial. A dial-type switch in which the rotational position of the dial is maintained by aligning a moderation member attached to the dial with a groove provided in the support member when the marked mark is aligned with the indicated position. The dial includes a cylindrical support portion that holds the moderation member and urging means that urges the moderation member in an outer circumferential direction, and the moderation member has a larger outer diameter at both ends than the other portions. a bar which is formed in a spherical shape, from the state that is oblique to the sliding with respect to the support member during dial rotation, when aligned with the groove provided in the support member, biasing by the biasing means Swung around the end portion that contacts the urging means, the side surface of the end portion of the detent member side is summarized in that striking the support.
[0009]
In the dial switch according to the present invention, when the moderation member is aligned with the groove provided in the support member, the side surface of the end portion on the moderation member side included in the moderation member hits the support portion using the urging force of the urging means. Therefore, a striking sound, that is, a moderation sound can be generated. As a result, it is possible to determine the rotational position of the dial without visual observation and to improve the operation feeling.
[0010]
In the dial type switch according to the aspect of the invention, before Symbol biasing means is a spring which is formed in a cylindrical shape, said detent member may be an outer diameter of the end portion is the inner diameter larger than the ones of the spring.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described using examples. FIG. 1 is a block diagram showing an outline of the configuration of a dial switch 20 according to an embodiment of the present invention, and FIG. 2 is a cross section of the dial switch 20 according to the embodiment as viewed from the AA cross section of FIG. FIG.
[0012]
The dial type switch 20 of the embodiment is configured as a changeover switch for controlling the heater of the vehicle, similarly to the dial type switch 120 of the conventional example, and as shown in the figure, a switch in which a plurality of wind direction positions 23 are displayed as pictures. The display board 22, the dial 30 which aligns the instruction mark 31 with the wind direction position 23 by rotation, and the moderation mechanism 40 attached to the rotating shaft of the dial 30 are provided. The moderation mechanism 40 includes a support member 42 that rotatably supports the rotary shaft 32 of the dial 30, a rib 44 provided in an arc shape on the support member, and a cylindrical shape attached to the rotary shaft 32 of the dial 30. A cylindrical member 50 and a rod-shaped moderation member 52 that is held by the cylindrical member 50 and receives a biasing force in the outer circumferential direction by a spring spring 54 are provided. A plurality of grooves 46 are provided in the arc-shaped rib 44. The groove 46 is formed at a position where it aligns with the moderation member 52 of the moderation mechanism 40 when the indication mark 31 of the dial 30 is aligned with the wind direction position 23 of the switch display board 22.
[0013]
Therefore, when the dial 30 is rotated, in the moderation mechanism 40, the moderation member 52 slides while being pressed against the rib 44 by the urging force of the spring spring 54, and the indication mark 31 of the dial 30 is aligned with one of the wind direction positions 23. When the position is reached, the moderation member 52 is fitted into the groove 46, and the dial 30 is held at that position. By applying a torque larger than the holding force to the dial 30, the moderation member 52 is detached from the groove 46, and the dial 30 is rotated again.
[0014]
FIG. 3 is an enlarged view showing a part of the moderation mechanism 40 with the moderation member 52 as the center. As shown in the drawing, the moderation member 52 has a rod shape, and both end portions 52a and 52b are formed in a spherical shape having a slightly larger outer diameter than the other portions. When the dial 30 is rotated, the end portion 52a of the moderation member 52 slides with respect to the rib 44, so that the moderation member 52 is slightly inclined in the cylindrical member 50 due to the reaction force. When the moderation member 52 is fitted into the groove 46, the sliding resistance is largely changed by changing the angle of the contact surface between the rib 44 and the moderation member 52. At this time, the moderation member 52 causes a so-called swinging motion in the cylindrical member 50 due to the urging force from the spring spring 54. Since the end portion 52b of the moderation member 52 is formed in a spherical shape, the moderation member 52 is slanted by sliding resistance and the regulation of the swinging operation is suppressed to be small. Therefore, the swinging operation is performed vigorously, and as a result, the side surface of the end portion 52a of the moderation member 52 strikes the inner wall of the cylindrical member 50, and a striking sound, that is, a moderation sound is generated. The operator can grasp the position of the dial 30 because he hears this moderation sound and feels hitting.
[0015]
According to the dial type switch 20 of the embodiment described above, the operator can grasp the position of the dial 30 without visual observation by a moderating sound or striking. In addition, since it is not necessary to make the outer diameter of the moderation member 52 smaller than necessary with respect to the inner diameter of the cylindrical member 50, there is no need to increase the biasing force of the spring spring 54 more than necessary. Therefore, the operation feeling is not impaired.
[0016]
The dial switch 20 of the embodiment is configured as a changeover switch for controlling the heater of the vehicle, but may be used in any device as long as it is a dial switch.
[0017]
In the dial switch 20 of the embodiment, both end portions 52a and 52b of the moderation member 52 are spherical. However, since the portion that contacts the spring spring 54 or the portion that contacts the rib 44 may be spherical, for example, hemispherical. It is good.
[0018]
The embodiments of the present invention have been described using the embodiments. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the gist of the present invention. Of course you get.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an outline of a configuration of a dial switch 20 according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the dial switch 20 according to the embodiment when viewed from the AA cross section of FIG.
FIG. 3 is an enlarged view showing a part of the moderation mechanism 40 with the moderation member 52 as a center.
FIG. 4 is a configuration diagram illustrating a configuration when a dial switch 120 of a conventional example is viewed from the front.
FIG. 5 is a cross-sectional view of a dial switch 120 of a conventional example when viewed from the BB cross section of FIG. 4;
[Explanation of symbols]
20, 120 dial type switch, 22, 122 switch display board, 23, 123 wind direction position, 30, 130 dial, 31, 131 indication mark, 32, 132 rotating shaft, 40, 140 moderation mechanism, 42, 142 support member, 44 , 144 Rib, 46, 146 Groove, 50, 150 Tube member, 52, 152 Moderation member, 52a, 52b End, 54, 154 Spring spring.

Claims (2)

A switch display board on which a plurality of indication positions are displayed on a circumference and a dial rotatably supported by a support member , and the mark displayed on the dial by rotating the dial at the indication position A dial-type switch that maintains the rotational position of the dial by aligning a moderation member attached to the dial with a groove provided in the support member when aligned,
The dial includes a cylindrical support portion that holds the moderation member, and an urging unit that urges the moderation member in an outer circumferential direction.
The detent member is a rod having both ends are formed to a large spherical outer diameter than the other portion, the sliding and state are oblique with respect to the support member during dial rotation, provided on the support member When aligning with the groove, the urging force of the urging means swings around the end contacting the urging means, and the side surface of the end portion on the moderation member side hits the support portion. Dial type switch. The dial type switch according to claim 1, wherein the urging means is a cylindrical spring.
The dial type switch, wherein an outer diameter of an end portion of the moderation member is larger than an inner diameter of the spring.

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