JP2015210090A - Pointer instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pointer instrument preventing wrong determination of an indication direction of a pointer.SOLUTION: The pointer instrument comprises: a pointer having light guiding properties, capable of rotating about the axis center, and including an indication part extending radially outwardly from the axis center; a plurality of light emission parts arranged on a back side from the pointer and around the axis center, and capable of irradiating the pointer with light; and an opaque cover covering at least a part of a front face of the pointer. The cover includes a light transmission part which is formed around the axis center and through which the light from the pointer passes.

Description

  The present invention relates to a pointer instrument.

  There is known a pointer instrument that emits a light guide with light emitted from a light emitting unit. Thereby, the visibility of the pointer in a dark environment is ensured. For example, Patent Document 1 discloses an example of such a pointer instrument.

JP 2013-066458 A

  When the pointer is emitted by irradiating light from a plurality of light emitting portions around the axis of the pointer, the periphery of the axis of the pointer may become too bright. If a cover that covers the periphery of the shaft center is attached to the pointer in order to suppress this, it becomes difficult for the user to visually recognize the position of the shaft center of the pointer. As a result, the user may misunderstand the direction indicated by the pointer.

  In view of the above, an object of the present invention is to provide a pointer instrument that suppresses misidentification of the pointing direction of the pointer.

  The object is to have a light guide property and to be rotatable around the axis, and to include a pointer including an indicator extending radially outward from the axis, and arranged on the back side of the pointer and around the axis A plurality of light emitting portions arranged and capable of irradiating the pointer with light, and an opaque cover that covers at least a part of the front surface of the pointer, and the cover is formed around the axis and is light from the pointer This can be achieved by a pointer instrument in which a light passage through which the light passes is formed.

  It is possible to provide a pointer instrument that suppresses misidentification of the direction of the pointer.

FIG. 1 is a front view of the timepiece. FIG. 2 is a partial cross-sectional view showing the internal structure of the watch. 3A to 3C are explanatory diagrams of the pointer unit. 4A to 4C are explanatory diagrams of the pointer unit. FIG. 5 is a partially enlarged view of FIG. FIG. 6 is a diagram showing the positional relationship between the pointer and the light emitting element when viewed from the axial direction. FIG. 7A is a side view of the pointer, and FIG. 7B shows the ratio of the radius of curvature of the inner side surface of the side wall portion to the outer radius of the cylindrical portion and the indication portion for the total luminous flux of the light emitted from the three light emitting elements. It is the graph which showed the relationship with the ratio of the light beam to do. FIG. 8 is an enlarged view of the hole of the cover. 9A to 9C are explanatory diagrams of modifications of the cover.

  Hereinafter, a timepiece 1 will be described as an example of a pointer instrument. FIG. 1 is a front view of the timepiece 1. The timepiece 1 includes a frame 3, a dial 5 fixed to the frame 3, a transparent front plate 9 positioned on the front side of the dial 5 and fixed to the frame 3, a dial 5 and a front plate 9 are provided with pointer units H to Hb and the like. The pointer units H to Hb rotate around the same axis in the same direction at different speeds. The pointer units H to Hb are an hour hand, a minute hand and a second hand, respectively, and the pointer unit H is the shortest and the pointer unit Hb is the longest. The pointer unit Hb is fixed to the connecting shaft Cb. In addition, although the character for showing the present | current time is not described on the dial plate 5, it may be described. Further, the dial plate 5 may not be provided.

  FIG. 2 is a partial cross-sectional view showing the internal structure of the timepiece 1. A light emitting element L is arranged on the back side of the pointer units H to Hb. Although only one light emitting element L is shown in FIG. 2, three light emitting elements L are arranged at equiangular intervals around the rotation axis A of the pointer units H to Hb, specifically, every 120 degrees. Has been. The three light emitting elements L are arranged on the same circle with the axis A as the center. The pointer unit H is disposed between the pointer unit Ha and the light emitting element L. The light emitting element L is a light source for causing the pointer units H to Hb to emit light in a dark environment. The light emitting element L is turned on or off based on a sensor (not shown) that detects the brightness around the timepiece 1, and is turned on when the periphery of the timepiece 1 is dark. The number of light emitting elements L is not limited to three.

  A movement M for driving the pointer units H to Hb is arranged on the back side of the dial plate 5. The rotation shaft S extends from the movement M to the front side of the dial 5. A cylindrical body C is fixed to the front end portion of the rotation shaft S, and a pointer unit H is fixed to the cylindrical body C. The rotation shaft S is rotated by the movement M, and the cylinder C and the pointer unit H are also rotated.

  The rotating shaft S is hollow and the rotating shaft Sa passes therethrough. The rotation shaft Sa passes through the rotation shaft S from the movement M and extends to the front side from the tip of the rotation shaft S. A cylindrical body Ca is fixed to the tip of the rotation shaft Sa, and a pointer unit Ha is fixed to the cylindrical body Ca. The rotation axis Sa is rotated by the movement M, and the cylindrical body Ca and the pointer unit Ha are also rotated.

  Similarly, the rotation shaft Sa is also hollow and the rotation shaft Sb passes therethrough. The rotating shaft Sb extends from the movement M through the rotating shaft Sa to the front side of the rotating shaft Sa. A connecting shaft Cb is fixed to the tip of the rotating shaft Sb. A pointer unit Hb is fixed to the tip of the connecting shaft Cb. The rotation shaft Sb is rotated by the movement M, and the connecting shaft Cb and the pointer unit Hb are also rotated. The pointer units H to Hb are arranged in order from the back side to the front side.

  Between the movement M and the dial plate 5, a printed circuit board PB on which the light emitting element L is mounted is disposed. In FIG. 2, a single light emitting element L is shown. The rotation shaft S passes through a hole PBh formed in the printed circuit board PB. The dial plate 5 is attached to the mounting plate 6. The support cylinder 7 surrounds the base end of the rotary shaft S, the pointer unit H, and the pointer unit Ha, and is fixed to the mounting plate 6. The printed circuit board PB is disposed on the back side of the mounting plate 6.

  The pointer units H and Ha will be described. 3A to 3C are explanatory views of the pointer unit H, FIG. 3A is a perspective view of the pointer unit H, FIG. 3B is an exploded perspective view of the pointer unit H, and FIG. 4A to 4C are explanatory views of the pointer unit Ha, FIG. 4A is a perspective view of the pointer unit Ha, FIG. 4B is an exploded perspective view of the pointer unit Ha, and FIG. 4C is a cross-sectional view of the pointer unit Ha. The pointer units H and Ha have similar configurations.

  The pointer units H and Ha include pointers 10 and 10a, covers 20 and 20a, and light diffusion films 30 and 30a, respectively. The pointers 10 and 10a rotate around the axis A. The entire length of the pointer unit Ha is longer than the entire length of the pointer unit H, and the pointer 10a, the cover 20a, and the light diffusion film 30a are longer than the pointer 10, the cover 20, and the light diffusion film 30, respectively. The pointers 10 and 10a are made of a transparent synthetic resin having a light guide property. The covers 20 and 20a are attached to the front sides of the pointers 10 and 10a, respectively, and are opaque and colored, for example, black, but are not limited thereto. The light diffusion films 30 and 30a are disposed between the pointer 10 and the cover 20 and between the pointer 10a and the cover 30a, respectively. The light diffusion films 30 and 30a diffuse the light emitted from the pointers 10 and 10a, respectively.

  As shown in FIGS. 2, 3C and 4C, the pointers 10 and 10a are cylindrical portions 11 and 11a, side wall portions 12 and 12a and 13a, indication portions 14 and 14a, balance portions 15 and 15a, a proximal end portion 18, 18a is included. The side wall portion 12 is continuous with the cylindrical portion 11. The side wall portions 12a and 13a are continuous with the cylindrical portion 11a. Details will be described later. The instruction part 14 and the balance part 15 extend substantially linearly in opposite directions from the side wall part 12 outward in the radial direction. The instruction portion 14a and the balance portion 15a extend substantially linearly in opposite directions from the side wall portions 12a and 13a to the radially outer side, respectively. The proximal end portion 18 is located on the back side of the cylindrical portion 11, protrudes radially inward from the cylindrical portion 11, and is fixed to the cylindrical body C. The proximal end portion 18a is located on the back side of the cylindrical portion 11a, slightly protrudes radially inward from the cylindrical portion 11a, and is fixed to the cylindrical body Ca. The protruding amount of the base end portion 18 inward in the radial direction is larger than that of the base end portion 18a.

  The cylindrical portions 11 and 11a are substantially cylindrical, and the axial centers of the cylindrical portions 11 and 11a coincide with the axial center A, but the present invention is not limited thereto, and the axial center A passes through the cylindrical portions 11 and 11a. Just do it. The side wall portion 12 of the pointer 10 is curved so as to move away from the axis A as it goes from the tube portion 11 to the front side as seen from the cross section of FIG. In other words, the side wall portion 12 is a conical cylindrical peripheral wall portion that is continuous with the entire circumference of the cylindrical portion 11 and has an inner diameter and an outer diameter that increase toward the front side. The inner surface 121 of the side wall portion 12 is continuous with the front surface of the indication portion 14 and the balance portion 15. The outer side surface of the side wall portion 12 is continuous with the back surface of the indication portion 14 and the balance portion 15.

  The side wall portions 12a and 13a of the pointer 10a are curved in directions opposite to each other so as to move away from the axis A as viewed from the cross section of FIG. That is, the side walls 12a and 13a are curved so as to face each other through the notch F. The inner side surfaces 121a and 131a of the side wall portions 12a and 13a are continuous with the front surfaces of the indicating portion 14a and the balance portion 15a, respectively. The outer side surfaces of the side wall portions 12a and 13a are continuous with the back surfaces of the indicating portion 14a and the balance portion 15a, respectively. Moreover, the instruction | indication part 14 is longer than the balance part 15, and the instruction | indication part 14a is longer than the balance part 15a.

  The covers 20 and 20a are made of thin metal and specifically aluminum, but are not limited thereto. The covers 20 and 20a include base portions 21 and 21a, indication portions 24 and 24a, balance portions 25 and 25a, openings 24P and 24Pa, and side wall portions 26 and 26a, respectively. The bases 21 and 21a are formed around the axis A, and each define an escape hole 20h through which the connecting shaft Cb passes. The instruction part 24 and the balance part 25 extend linearly in the opposite directions from the base part 21 in the radial direction and cover the front surfaces of the instruction part 14 and the balance part 15, respectively. The opening 24P is formed in the indicator 24 and extends in the longitudinal direction to partially expose the indicator 14 of the pointer 10. Such an opening is not formed in the balance portion 25. The side wall portion 26 is a portion where both sides of the base portion 21, the instruction portion 24, and the balance portion 25 are bent, and partially covers the side surface of the pointer 10. The same applies to the base part 21a, the escape hole 20h, the instruction part 24a, the balance part 25a, the opening part 24Pa, and the side wall part 26a. In addition, although the balance parts 15, 15a, 25, and 25a are provided in order to balance the whole pointer unit H, it does not need to be provided. Further, three holes 22a are formed around the axis A at equal angular intervals in the base 21a. Details of the hole 22a will be described later.

  The light diffusion films 30 and 30a include base portions 31 and 31a and extending portions 34 and 34a, respectively. The base 31 is formed in a substantially ring shape around the axis A, defines an escape hole 30 h, and is located on the back side of the base 21 of the cover 20. The extending portion 34 extends substantially linearly outward from the base portion 31 and is disposed between the indicating portions 14 and 24. The same applies to the base portion 31a, the escape hole 30ha, and the extending portion 34a. The cylindrical portions 11 and 11a and the escape holes 20h, 20ha, 30h, and 30ha are arranged concentrically.

  As shown in FIG. 2, the cylindrical portion 11 a of the pointer 10 a is disposed in the cylindrical portion 11 of the pointer 10. Further, the rotating shaft Sa, the cylindrical body Ca, and the connecting shaft Cb pass through the cylindrical portion 11 of the pointer 10. The cylinder portion 11a and the connecting shaft Cb pass through the escape hole 20h of the cover 20. As shown in FIG. 2, the cylindrical portion 11 and the cylindrical portion 11 a are arranged concentrically, and the cylindrical portion 11 a is located in the cylindrical portion 11. The base end part 18a is surrounded by the cylinder part 11, and the base end parts 18 and 18a are arranged close to each other. In addition, in FIG. 2, the code | symbol regarding the light-diffusion films 30 and 30a is abbreviate | omitted.

  When the light emitting element L is turned on, light enters the pointers 10 and 10a to emit light. The user can visually recognize the pointer 10 that emits light through the opening 24P of the cover 20, and can visually recognize the pointer 10a that emits light through the opening 24Pa and the hole 22a of the cover 20a. Details are described below.

  FIG. 5 is a partially enlarged view of FIG. The light emitting element L has an emission surface L1 that is perpendicular to the axis A and emits light. FIG. 6 is a diagram showing the positional relationship between the pointers 10 and 20 and the light emitting element L when viewed from the direction of the axis A. As shown in FIG. 5, the base end portion 18 has a substantially ring shape protruding radially inward from the tube portion 11, and the inner periphery of the base end portion 18 is fixed to the cylinder body C. The proximal end portion 18 is located on the back side and directly faces the exit surface L1 of the three light emitting elements L. The exit surface 181 corresponds to the back surface of the entrance surface 181 and is located radially inward of the cylindrical portion 11. 183. The exit surface 183 faces the entrance surface 181a located on the back side of the proximal end portion 18a of the pointer 10a. The entrance surface 181, the exit surface 183, and the entrance surface 181 a are each substantially ring-shaped and formed substantially flat. The incident surfaces 181 and 181a are slightly inclined with respect to the axis A. The exit surface 183 is substantially perpendicular to the axis A. The incident surface 181 always directly faces the emission surfaces L1 of all the light emitting elements L regardless of the rotation angle of the pointer 10, and light from the light emitting elements L is incident thereon. In FIG. 6, the outer edges of the incident surfaces 181 and 181a are indicated by dotted lines, but the exit surface 183 is not labeled.

  A part of the light from the light emitting element L enters the cylindrical portion 11 from the incident surface 181, is internally reflected by the inner surface 121 of the side wall portion 12, and is guided to the distal end side of the indicating portion 14. As a result, the instruction unit 14 emits light. Further, another part of the light from the light emitting element L enters the cylindrical portion 11a from the incident surface 181a via the incident surface 181 and the emission surface 183, and is internally reflected by the inner surface 121a of the side wall portion 12a. Guided to the tip side of the portion 14a. As a result, the instruction unit 14a emits light. Since the inner side surfaces 121 and 121a have a gentle arcuate curve, the amount of light leakage to the outside is reduced and the inner surface is efficiently reflected. In FIG. 5, the traveling direction of such light is indicated by arrows.

  Since the cylindrical portion 11 of the pointer 10 surrounds the proximal end portion 18a of the pointer 10a and the proximal end portion 18 of the pointer 10 protrudes inward in the radial direction, the incident surface 183 and the proximal end portion 18a of the proximal end portion 18 are incident. The surface 181a approaches and directly faces. Thus, since the exit surface 183 of the pointer 10 and the entrance surface 181a of the pointer 10a are close to each other and directly face each other, the loss of light when the light emitted from the exit surface 183 enters the entrance surface 181a is reduced. Can be suppressed. Thereby, not only the pointer 10 but also the amount of light incident on the pointer 10a can be secured, and the decrease in the luminance of the pointer 10a is suppressed.

  Since the light emitting element L is directly opposed to the incident surface 181 of the proximal end portion 18 of the pointer 10, the light of the light emitting element L is directly incident on the pointer 10 to efficiently use the light amount. Can emit light. In addition, since light enters the pointer 10a only through the pointer 10, the pointer 10a is used by using the light amount more efficiently than when light is incident on the pointer 10a through two or more light guide members. Can emit light. As described above, the decrease in luminance of both hands 10 and 10a is suppressed.

  The incident surface 181 is inclined so that the inner side is closer to the light emitting element L than the outer side, and is slightly inclined with respect to the emission surface L1 of the light emitting element L. For this reason, for example, light emitted parallel to the axis A from the emission surface L1 is refracted by the incident surface 181 and travels inside the cylinder portion 11 toward the inner surface 121 side of the side wall portion 12. For this reason, the light is internally reflected by the inner side surface 121 of the side wall portion 12 and proceeds to the tip side of the indicating portion 14. Thereby, the light from the light emitting element L can be efficiently guided to the instruction unit 14.

  Similarly, the incident surface 181a is inclined so that the inner side is closer to the light emitting element L than the outer side, and is inclined with respect to the emission surface L1 of the light emitting element L. For this reason, the light radiate | emitted from the output surface 183 can be refracted | refracted by the incident surface 181a, and can be guided to the inner surface 121a side of the side wall part 12a. Thereby, light can be guided to the front end side of the instruction | indication part 14a by making internal reflection on the inner surface 121a of the side wall part 12a. The emission surface 183 is substantially parallel to the emission surface L1 of the light emitting element L.

  FIG. 7A is a side view of the pointer 10a. FIG. 7A shows a state in which the relative positional relationship between the pointer 10a and the light emitting element L is changed by the rotation of the pointer 10a, and shows light traveling in the pointer 10a. As shown to FIG. 7A, the side wall part 12a has stood up from the root part T which followed the cylinder part 11a. Moreover, as shown in FIG. 6, the angle R around the axis A of the root portion T exceeds 180 degrees. For example, the angle R is 225 degrees, but may be 190 degrees or more and 260 degrees or less. The side wall part 12a including the root part T is formed symmetrically in the direction in which the instruction part 14a extends. Further, as shown in FIG. 7A, the side wall portion 12 a overlaps the axis A when viewed from a direction perpendicular to both the direction in which the instruction portion 14 a extends and the axis A.

  Thus, the base part T of the side wall part 12a continuing to the instruction part 14a continues to the cylindrical part 11a over an angular range exceeding 180 degrees around the axis A. Thereby, even if the relative position of the pointer 10a and the light emitting element L changes due to the rotation of the pointer 10a, more light can be internally reflected by the inner surface 121a of the side wall portion 12a. Therefore, it is possible to suppress the brightness of the instruction unit 14a from greatly decreasing according to the rotational position of the pointer 10a. As shown in FIG. 7A, the ratio of the radius of curvature Rb of the inner surface 121a of the side wall portion 12a to the outer radius Ra of the cylindrical portion 11a is established as Rb / Ra = 1.7, but is not limited thereto. For example, as shown in FIG. 7B, the relationship of 1.4 <Rb / Ra <2.6 may be satisfied. As a result, the light incident on the cylindrical portion 11a is internally reflected by the inner side surface 121a of the side wall portion 12a and can be efficiently guided to the indicating portion 14a side, and the luminance of the indicating portion 14a can be ensured. 7B shows the ratio of the radius of curvature Rb of the inner side surface 121a of the side wall portion 12a to the outer radius Ra of the cylindrical portion 11a, and the luminous flux that enters the indicating portion 14a with respect to the total luminous flux of the light emitted from the three light emitting elements L. It is the graph which showed the relationship with the ratio. The horizontal axis indicates Rb / Ra, and the vertical axis indicates the percentage of the light beam that is internally reflected by the inner side surface 121a and enters the indicating portion 14a with respect to the total light flux of the light emitted from the three light emitting elements L. is there.

  Further, since the root portion T of the side wall portion 12a is continuous to the cylindrical portion 11a over an angular range exceeding 180 degrees around the axis A, the root portion of the side wall portion 13a continuous to the balance portion 15a is less than 180 degrees. Is set. For this reason, the light quantity which enters into the cylinder part 11a, is internally reflected by the inner side surface 131a of the side wall part 13a, and is guided to the balance part 15a is suppressed. Thereby, a large amount of light can be guided to the instruction unit 14a.

  Here, it is conceivable to provide more light emitting elements around the axis A in order to ensure the brightness of the instruction unit 14a regardless of the rotational position of the pointer 10a. However, in this case, manufacturing cost and power consumption increase. In the present embodiment, since the range of the root portion T of the side wall portion 12a continuous with the cylindrical portion 11a exceeds 180 degrees, a decrease in luminance of the indication portion 14a of the pointer 10a is suppressed while suppressing manufacturing cost and power consumption. Has been.

  2, 3A to 3C, the side wall portion 12 of the pointer 10 has a conical cylindrical shape that is continuous with the entire circumference of the cylindrical portion 11 and has an inner diameter that increases toward the front side. A part of the portion 12 extends linearly. For this reason, the light that has entered the cylindrical portion 11 is diffused not only on the side of the indicating portion 14 but also on the entire side wall portion 12 having a conical cylindrical shape. The balance portion 15 extends linearly from a part of the side wall portion 12 in the direction opposite to the instruction portion 14. For this reason, the light incident on the cylindrical portion 11 is diffused also to the balance portion 15 side. Here, the pointer 10 is disposed closer to the light emitting element L than the pointer 10a. Therefore, in the pointer 10, the light from the light emitting element L is diffused not only to the indication unit 14 side but also to the side wall portion 12 and the balance unit 15 side, thereby suppressing the luminance of the indication unit 14 from becoming too strong. . Thereby, the brightness | luminance difference of the instruction | indication parts 14 and 14a of the pointers 10 and 10a is suppressed.

  Next, the cover 20 will be described in detail. As shown in FIGS. 3A to 3C, the opaque cover 20 has an indicator 24 and a side wall 26, and partially covers the front and side surfaces of the indicator 14 of the pointer 10 that is transparent. For example, when the cover 20 is not provided, since the pointer 10 is transparent, the pointer 10 may be difficult to visually recognize in a bright environment. Here, in order to suppress a decrease in visibility in a bright environment, it is conceivable to perform painting or printing on the outer surface of the pointer 10. However, in this case, when light that has entered the pointer 10 from the light emitting element L travels outside the pointer 10 in a dark environment, internal reflection may be hindered by painting or printing applied to the outer surface of the pointer 10. . As a result, there is a risk that the light on the front end side of the indicating unit 14 is lowered without sufficiently guiding light to the front end side of the indicating unit 14 of the pointer 10. In the present embodiment, by attaching the cover 20 which is a separate member to the pointer 10, it is possible to suppress a decrease in the brightness of the pointer 10 even in a dark environment while suppressing a decrease in the visibility of the pointer unit H in a bright environment. Yes. The same applies to the pointer 10a and the cover 20a of the pointer unit Ha.

  As described above, since the cover 20 of the present embodiment partially covers the side surface of the pointer 10, light is prevented from leaking to the outside from the side surface of the pointer 10 in a dark environment. For example, if the side surface of the pointer 10 is not covered, the amount of light leaking from the side surface of the pointer 10 increases, and the leaked light may be reflected on other peripheral members and the visibility of the pointer 10 may be reduced. In the present embodiment, the cover 20 partially covers the side surface of the pointer 10 to suppress light leakage from the side surface of the pointer 10, thereby suppressing a decrease in visibility of the pointer 10 in a dark environment. . The same applies to the pointer 10a and the cover 20a of the pointer unit Ha.

  The cover 20 in this embodiment partially covers both the front and side surfaces of the pointer 10, but is not limited thereto. For example, the cover 20 may have a frame shape that covers the front surface without covering the side surface of the pointer 10. Further, the cover 20 may have a frame shape that covers the side surface without covering the front surface of the pointer 10. In any case, the lowering of the visibility of the pointer unit H in a bright environment can be suppressed by attaching the opaque cover 20, which is a separate member, to the pointer 10. Moreover, when the cover 20 covers the side surface of the pointer 10, light leakage from the side surface of the pointer 10 can be suppressed in a dark environment. The same applies to the pointer 10a and the cover 20a of the pointer unit Ha.

  In addition, when the cover 20 partially covers the front and side surfaces of the pointer 10, misalignment of the light diffusion film 30 disposed between the pointer 10 and the cover 20 is suppressed. The same applies to the pointer 10a, the cover 20a, and the light diffusion film 30a of the pointer unit Ha.

  FIG. 8 is an enlarged view of the hole 22a of the cover 20a. In FIG. 8, the outline of the cover 20a is omitted. Three holes 22a are formed at equiangular intervals around the escape hole 20ha of the cover 20a, that is, around the axis A of the pointer 10a. The hole 22a is in the shape of a long hole whose longitudinal direction is the circumferential direction around the axis A. The plurality of hole portions 22a are formed on the same circumference centered on the axis A. In a dark environment, a part of the light incident from the light emitting element L into the pointer 10a passes through the hole 22a. Since the hole 22a is formed around the axis A of the pointer 10a, the user can grasp the position of the axis A of the pointer 10a in a dark environment.

  For example, when the hole 20a is not provided in the cover 20a and only the opening 24Pa is provided, the user can grasp the posture of the pointer 10a by the light leaking from the opening 24Pa. However, since the user cannot grasp the position of the axis A of the pointer 10a, the visibility of the time is lowered and the user may misunderstand the time. In the present embodiment, since the hole 22a is formed around the axis A, the user can grasp the position of the axis A of the pointer 10a, and the user can be prevented from mistaking time.

  In consideration of the size of the pointer unit Hb and the connecting shaft Cb disposed on the front side of the cover 20a, the position and size are set so that the user can visually recognize the hole 22a when viewed from the front side. Moreover, although the magnitude | size and shape of the hole 22a are the same, it is not limited to this, The number of the holes 22a is also not limited. There may be at least two holes 22a around the axis A. Further, although the hole portion 22a is provided in the cover 20a attached to the pointer 10a disposed on the front side of the pointer 10, such a hole portion may be provided in the cover 20 attached to the pointer 10. Also in this case, considering the size of the pointer units Ha and Hb and the connecting shaft Cb arranged on the front side of the cover 20, the position and size of the hole are set so that the user can see and view from the front side. .

  9A to 9C are explanatory diagrams of modifications of the cover. In addition, about the same structure, the overlapping description is abbreviate | omitted by attaching | subjecting the same code | symbol. As shown in FIG. 9A, four holes 22b are formed at equiangular intervals around the escape hole 20hb, that is, around the axis A of the pointer 10a, at the base 21b of the cover 20b. The length of the hole 22b in the longitudinal direction is shorter than that of the hole 22a. The size and shape of each hole 22b are the same, but not limited to this, and the number of holes 22b is not limited.

  As shown in FIG. 9B, eight holes 22c are formed at equiangular intervals around the escape hole 20hc, that is, around the axis A of the pointer 10a, at the base 21c of the cover 20c. The hole 22c is circular. The size and shape of each hole 22c are the same, but not limited to this, and the number of holes 22c is not limited.

  As shown in FIG. 9C, a light transmission portion 22d is formed around the escape hole 20hd, that is, around the axis A of the pointer 10a, at the base portion 21d of the cover 20d. The light transmitting portion 22d is a portion formed of a light transmissive material. Note that the base 21d does not have optical transparency. Thus, by forming the light transmission part 22d instead of providing a hole around the axis A, the light transmission part 22d emits light in a dark environment, and the user can grasp the position of the axis A. In this case, for example, the cover 20d main body other than the light transmission part 22d is formed of a synthetic resin or metal having no light transmission property, and the light transmission part 22d is formed of a synthetic resin so that the cover 20d main body and the light transmission part are formed. 22d may be bonded or fixed. Further, the cover 20d may be manufactured by two-color molding using a synthetic resin that does not transmit light and a synthetic resin that has the light transmitting property.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

  In the above embodiment, the timepiece 1 in which the pointer rotates 360 degrees has been described as an example of the pointer instrument. However, the pointer is not limited to this, and the pointer may rotate in a certain angle range. For example, the pointer meter may be a hygrometer, a thermometer, a compass, a speed meter, and other measuring devices. Further, the pointer instrument may be provided with only one pointer, or may be provided with two or more pointers. In the said Example, the light emitting element L is not limited to this which is an example of a light emission part, For example, an incandescent lamp and a fluorescent lamp may be sufficient.

  The pointers 10 and 10a are examples of first and second pointers. The light diffusion films 30 and 30a are an example of a light diffusion member. The cylinder portions 11 and 11a are examples of first and second cylinder portions. The side wall portions 12 and 12a are examples of first and second side wall portions. The instruction units 14 and 14a are an example of first and second instruction units. The base end portions 18 and 18a are examples of first and second base end portions. The incident surfaces 181 and 181a are examples of first and second incident surfaces, respectively. The hole portions 22a to 22c and the light transmission portion 22d are examples of a light passage portion.

  The pointer 10, the cylinder part 11, the side wall part 12, the instruction part 14, and the balance part 15 are examples of the back side pointer, the back side cylinder part, the back side wall part, the back side instruction part, and the back side balance part, respectively.

DESCRIPTION OF SYMBOLS 1 Clock 10, 10a Pointer 11, 11a Tube part 12, 12a Side wall part 121, 121a Inner side surface 14, 14a Pointing part 18, 18a Base end part 181 Incident surface 183 Output surface 20, 20a Cover 22a Hole part (light passage part)
24P, 24Pa Opening 26, 26a Side wall 30, 30a Light diffusing film A Axis H, Ha Pointer unit T Root

Claims (4)

A pointer having a light guide property, rotatable around an axis, and including an indicator extending radially outward from the axis;
A plurality of light emitting units arranged on the back side of the pointer and arranged around the axis and capable of irradiating the pointer with light;
An opaque cover covering at least a part of the front surface of the pointer,
The cover instrument is a pointer instrument which is formed around the axis and has a light passage portion through which light from the pointer passes.   The pointer instrument according to claim 1, wherein the light passage portion is a plurality of holes formed around the axis.   The pointer instrument according to claim 1, wherein the light passage portion is made of a light transmissive material. The pointer instrument according to any one of claims 1 to 3, wherein the cover is formed with an opening that exposes a part of the indicator and extends in a longitudinal direction of the indicator.

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