JP4465657B2 - Pointer-type instrument - Google Patents

Description

  The present invention relates to a pointer-type instrument mounted on a vehicle represented by, for example, an automobile, and in particular, by moving the pointer through a moving member, the inside of the movement range of the pointer can be used as a display area capable of displaying other information. The so-called centerless type pointer-type instrument.

Conventionally, as this type of pointer-type instrument, for example, the one described in Patent Document 1 below is known. This pointer-type instrument is provided with a pointer on a ring-shaped moving member, and this moving ring is rotationally driven by a pinion (rotating member). A gear train is formed on each of the ring-shaped moving member and the pinion. The ring-shaped moving member and the pinion are coupled to each other, and when the pinion rotates, the ring-shaped moving member rotates and enables the measurement value to be indicated by the pointer.
JP 2000-1331099 A

By the way, in the pointer-type instrument described in Patent Document 1, a plurality (three) of support members are distributed in the circumferential direction of the ring-shaped moving member, and the ring-shaped moving member is supported through the plurality of support members. However, since the ring-shaped moving member is only supported by a plurality of support members, if the ring-shaped moving member is deformed due to expansion or contraction due to thermal influence, the ring-shaped moving member and the pinion It may be difficult to maintain the proper meshing state. Further, as a means for coping with this point, for example, the ring-shaped moving member is attached to the pinion side on one of a plurality of supporting members (a supporting member arranged at a position facing the pinion in the diameter direction) or a dedicated member different from these supporting members. Although it is conceivable to cause the ring-shaped moving member to follow the deformation of the ring-shaped moving member, there is a problem that the load applied to the ring-shaped moving member and the support member increases.
Therefore, the present invention provides a urging function to a pointer-type instrument or a supporting member that can ensure an appropriate connection state without providing a supporting member with a biasing function or providing a dedicated biasing member. The main objective is to provide a pointer-type instrument that can ensure proper connection while reducing the load on the ring-shaped moving member and support member even when a dedicated biasing member is used. To do.

In order to achieve the above object, the present invention provides an indicator, an indicator plate having an indicator portion corresponding to the indicator, a moving member that supports the indicator and has a first gear train around it, and the first A pointer mounted on a vehicle, comprising: a rotary member having a second gear train that meshes with the gear train; and a drive device that rotates the rotary member along the indicator portion by rotating the rotary member through a drive shaft. in formula instrument, wherein the rotating member by the weight of the moving member first, the direction and the meshing depth of the self-weight to a position a force to the second gear train direction meshing depth increases the each other acts deeper It is characterized in that it is provided so as to coincide with the direction .

  Further, the present invention is characterized in that the moving member is circular or annular, and the rotating member is arranged on an imaginary line extending in the diameter direction.

  Further, the present invention is characterized in that the moving member has an annular shape having a first gear train on an inner peripheral portion, and the rotating member is disposed on an inner peripheral portion of the moving member.

  Further, the present invention has a biasing means for pressing the moving member toward the rotating member in a direction in which the engagement depth of the first gear train with respect to the second gear train is increased. To do.

  According to the present invention, there is provided a restricting means for restricting a meshing depth between the first gear train and the second gear train on a rotating shaft of the rotating member or the driving device for rotating the rotating member. And

  ADVANTAGE OF THE INVENTION According to this invention, the pointer type instrument which can achieve the initial objective, and can ensure a stable connection state, without providing a biasing function to a support member, or providing an exclusive member for biasing, or a support member Even when a pressing function is provided or a dedicated pressing member is employed, it is possible to provide a pointer-type instrument that can secure a stable connection state while reducing the load applied to the moving member and the supporting member.

  Hereinafter, embodiments of a pointer-type instrument according to the present invention will be described with reference to the drawings. 1 to 7 show an embodiment of the present invention. FIG. 1 is a front view of a pointer-type instrument according to the present embodiment. FIG. 2 is a front view when an indicator plate is removed from FIG. 3 is a front view when the moving member and the support member are removed in FIG. 2, FIG. 4 is a rear view of the support member, FIG. 5 is a cross-sectional view along AA in FIG. 2, and FIG. FIG. 7 and FIG. 7 are CC cross-sectional views of FIG. 5 to 7, only FIG. 7 is a cross-sectional view of the state in which the pointer-type instrument according to the present embodiment is attached to the vehicle.

  As shown in FIGS. 1 and 2, the pointer-type instrument according to the present embodiment includes an indicator plate 1, a moving member 2 disposed behind the indicator plate 1, and a pointer 3 attached to the moving member 2. A base member 4 that is arranged behind the moving member 3 and directly and indirectly supports the moving member 2, a driving device 5 that rotates and moves the moving member 2, and a display device 6 that displays predetermined information to an observer. And a circuit board 7 disposed behind the display device 6.

  The indicator plate 1 has a see-through portion 11 formed of a through hole in a substantially central region, and on the outer periphery of the see-through portion 11, indicator portions such as letters and scales arranged in an arc along the movement path of the pointer 3 12 is provided. These indicator portions 12 are formed on a substrate made of a synthetic resin plate constituting the indicator plate 1 by means such as screen printing.

  The moving member 2 is made of a synthetic resin body formed in a closed ring shape (annular shape), and has a gear train (first gear train) meshed with a rotating member, which will be described later, driven through a driving device 5 on the inner periphery thereof. ) 21 and a contact portion 22 that comes into contact with a regulating means and a support member, which will be described later, of the driving device 5 are formed. In this example, the gear train 21 protrudes inwardly behind the contact portion 22. Is provided. Note that the moving member 2 does not necessarily have a closed ring shape, and may have any shape such as a “C” shape or a linear shape.

  The pointer 3 is made of a linear synthetic resin body, is attached and fixed to the moving member 2 so that the tip thereof faces the center side, and rotates together with the moving member 2 to indicate the indicator portion 11. The pointer 3 and the indicator 11 are light transmissive and emit light upon receiving light from a light source (not shown).

  The base member 4 is made of a composite of metal and synthetic resin, and is installed on the circuit board 7 through a spacer (not shown). The base member 4 includes a base material portion (metal portion) 41 made of a metal disk and an outsert molding (base material portion 41) so as to partially cover a part (a plurality of locations) of the base material portion 42. And a synthetic resin portion 42 formed by injection molding a resin at a necessary portion of the metal material to form a synthetic resin portion.

  As shown in FIGS. 3 and 4, the base material portion 41 enables connection between the see-through portion 11 of the indicator plate 1 and the penetration portion 43 corresponding to the display device 6, the moving member 2, and the driving member 5. Therefore, the reinforcing portion 45 is formed by having the exposed portion 44 exposing the driving device 5 and bending the outer peripheral portion approximately 90 degrees to the rear side. The hole-shaped through portion 43 and the exposed portion 44 and the bent portion-shaped reinforcing portion 45 are formed by press molding.

  The synthetic resin portion 42 is a support location for supporting and supporting the moving member 2 and a support location for supporting the support location. The synthetic resin portion 42 is in direct contact with the moving member 2 and forms a support portion 42a for supporting the moving member 2 and moves. A support part 42b for supporting the support members 8a and 8b for directly contacting and supporting the member 2 and a connecting part 42c (see FIG. 4) for connecting the support part 42a and the support part 42b are formed.

  That is, the support portion 42a constitutes a thrust direction support portion that makes point contact with the bottom surface of the moving member 2, as shown in detail in FIG.

  Further, as shown in detail in FIG. 5, the support portion 42 b is made of a flexible synthetic rubber or synthetic resin, and contacts with the contact portion 22 of the moving member 2 to form a radial direction support portion of the moving member 2. Of the support member 8a composed of, for example, a metal shaft portion 82 that rotatably supports the guide roller 81, the shaft portion 82 is directly fixed and supported, and the guide roller 81 is indirectly supported. The support member 8a is supported.

  Further, as shown in detail in FIG. 6, the support portion 42 b is configured so that the guide roller 83 is the same component as the guide roller 81, and the guide roller 83 is always pressed downward in FIG. Of the supporting member 8b, which is composed of the first gear train 21 of the second and the pressing movement means (biasing means) 84 for biasing in the direction in which the meshing depth of the gear trains of the rotating portion described later becomes deeper, The support member 8b is supported by directly supporting and fixing a part of the moving means 84 and indirectly supporting the guide roller 83.

  In this case, the pressing and moving means 84 includes a metal shaft portion 85 that is directly press-fitted and fixed to the support portion 42 b, an arm portion 86 made of, for example, synthetic resin, fixed to the shaft portion 85, and fixed to the arm portion 86. The metal shaft portion 87 and a biasing member 88 formed of a coil spring that constantly biases the guide roller 83 supported by the arm portion 86 to the outside of the moving member 2 are configured.

  Further, the connecting portion 42c (see FIG. 4) is a place that becomes a passage for the synthetic resin when the support portion 42a and the support portion 42b are formed by outsert molding. Thus, the connecting portion 42c is set. As a result, the number of gates formed in the mold can be reduced, the structure of the mold itself can be simplified, and the molding operation can be facilitated.

  The driving device 5 is formed of, for example, a stepping motor, and is on an imaginary line XL extending in the diameter direction of the moving member 2 and has an angle of “12 o'clock” in the circumferential direction of the moving member 2 as shown in FIGS. It is located and fixed on the circuit board 7. The drive shaft 51 of the drive device 5 extends forward, and is provided with a rotating member 52 and a restricting means 53. Note that the drive shaft 5 of the drive device 5 is located on the virtual line XL, whereby the centers of the rotating member 52 and the restricting means 53 are also located on the virtual line XL. As a result, the rotating member 52 and the restricting means 53 is also located on the virtual line XL.

  The rotating member 52 is made of a synthetic resin body having a gear train (second gear train) 54 that meshes with the gear train 21 of the moving member 2 on the outer periphery thereof, and is fixed so as to rotate together with the drive shaft 51.

  The restricting means 53 is made of a synthetic resin body having an outer diameter larger than that of the rotating member 52, is disposed in front of the rotating member 52, rotates in contact with the contact portion 22 of the moving member 2, and the own weight of the moving member 2. Even if force is applied in the direction in which the meshing depth between the gear trains 21 and 54 is deepened by the pressing and moving means 84, the meshing depth of the gear trains 21 and 54 is brought into contact with the contact portion 22 of the moving member 2. Therefore, it is possible to prevent the driving device 5 from being overloaded and the gear trains 21 and 54 to be locked.

  In this example, the rotating member 52 and the regulating means 53 are separate parts, but they may be integrated parts.

  The display device 6 is composed of, for example, a liquid crystal display device, and is mounted on the circuit board 7 so as to face the see-through portion 11 of the index plate 1. For example, measurement information or navigation information including travel distance data or outside air temperature data, and the like. Is displayed.

  The pointer type instrument of the present embodiment configured as described above is set so that the drive shaft 51 of the drive device 5 rotates according to the measurement amount, and the rotation of the rotation member 52 by the rotation of the drive shaft 51 causes the rotation. The moving member 2 having the gear train 21 meshing with the gear train 54 of the member 52 rotates, and the pointer 3 provided on the moving member 2 indicates the indicator portion 12 on the outer periphery of the fluoroscopic portion 11 facing the display device 6.

  Here, focusing on the connecting position of the moving member 2 and the rotating member 52, in the present embodiment, the rotating member 52 receives the own weight G of the moving member 2 so that the own weight G of the moving member 2 is the first, The connection between the second gear trains 21 and 54 is utilized so that the connection between the first and second gear trains 21 and 54 can follow the deformation of the moving member 2.

  That is, as shown in FIG. 7, the arrangement position of the rotating member 52 with respect to the moving member 2 is set in the direction D in which the meshing depth between the first and second gear trains 21 and 54 is increased by the own weight G of the moving member 2 itself. For example, even if the moving member 2 is deformed due to expansion or contraction due to thermal influence, the meshing connection state between the first and second gear trains 21 and 54 can be stably maintained. I have to. In FIG. 7, the direction of the own weight G coincides with the direction of gravity, and the direction D coincides with the inclination direction with respect to the own weight G direction when the pointer-type instrument is attached to the vehicle. The angle θ, which is the inclination of D, is set to 20 degrees, for example.

  As described above, the pointer-type meter according to the present embodiment has the pointer 3, the index plate 1 having the index portion 12 corresponding to the pointer 3, the first gear train 21 around the pointer 3 and the periphery. A rotating member 52 having a moving member 2, a second gear train 54 that meshes with the first gear train 21, and rotating the rotating member 52 through the drive shaft 51, the pointer 3 is rotated along the indicator portion 12. And a driving device 5 for rotating the rotating member 52. The rotating member 52 is provided at a position where a force acts in the direction D in which the meshing depth between the first and second gear trains 21 and 54 is increased by the own weight direction G of the moving member 2. Accordingly, even when the support member 8b is provided with an urging function by the pressing and moving means (biasing means) 84, the thermal expansion of the moving member 2 while reducing the load applied to the moving member 2 and the supporting member 8b. Can follow the contraction, To ensure proper connection state and if the gears 21, 54 by Les, thereby improving the reliability.

  That is, since the force acts in the direction D in which the meshing depth between the first and second gear trains 21 and 54 is increased by the own weight G of the moving member 2, the pressing movement means (biasing means) 84 Even when the urging force can be set to be weak, and the support member 8b is provided with an urging function, each gear 21 is reduced while reducing the load applied to the support member 8b and the load applied to the moving member 2 through the support member 8b. , 54 can be secured.

  In the present embodiment, the support member 8b has a biasing function. However, whether or not the support member 8b has a biasing function is arbitrary in consideration of various design conditions. If it is possible to ensure an appropriate connection state between the gears 21 and 54 without providing the gears, they may be abolished.

  Further, in the present embodiment, the moving member 2 has a circular shape or an annular shape, and the rotating member 52 is arranged on the imaginary line XL extending in the diameter direction thereof, so that the direction of the weight G of the moving member 2 and the meshing depth are obtained. 2 can be made coincident with each other in the plan view shown in FIG. 2, the weight G of the moving member 2 can be surely and more effectively determined between the first and second gear trains 21, 54. Can be used for consolidation.

  In the present embodiment, the moving member 2 has an annular shape having the first gear train on the inner peripheral portion, and the rotating member 52 is arranged on the inner peripheral portion of the moving member 2, so that the outer peripheral portion of the moving member 2 is Compared with the case where the first gear train is formed and the rotating member is arranged outside the moving member 2, the apparatus can be made smaller.

  FIG. 8 is a front view showing another embodiment of the present invention. In this embodiment, the first gear train 21 is formed on the outer peripheral portion of the moving member 2, and the rotating member is arranged outside the moving member 2. The second gear train 54 is connected to the first gear train 21.

  In this embodiment as well, as in the above-described embodiment, the position where the force acts in the direction D in which the meshing depth between the first and second gear trains 21 and 54 is increased due to the weight G of the moving member 2. Therefore, the same effect as in the above embodiment can be expected.

  In FIG. 8, the guide roller 83 urges the moving member 2 toward the rotating member 52 by an urging member (not shown), but the urging member or the guide roller 83 itself may be eliminated.

It is a front view of the pointer type meter by one embodiment of the present invention. It is a front view at the time of removing the indicator plate in FIG. It is a front view at the time of removing a moving member and a support part in FIG. It is a rear view of a support member. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing of the state which attached the pointer type meter by this embodiment to the vehicle by CC sectional drawing of FIG. It is a front view which shows other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Index plate 2 Moving member 3 Pointer 4 Base member 5 Drive device 6 Display device 7 Circuit board 8a Support member 8b Support member 11 See-through portion 12 Index portion 21 Gear train (first gear train)
DESCRIPTION OF SYMBOLS 22 Contact part 41 Base material part 42 Synthetic resin part 42a Support part 42b Support part 42c Connecting part 43 Through part 44 Exposed part 45 Reinforcement part 51 Drive shaft 52 Rotating member 53 Control means 54 Gear train (2nd gear train)
81 Guide roller 82, 85, 87 Shaft 83 Guide roller 84 Pressing and moving means (urging means)
86 Arm part 88 Biasing member D direction G Own weight θ angle

Claims (5)

A pointer, an indicator plate having an indicator portion corresponding to the pointer, a moving member that supports the pointer and has a first gear train around it, and a second gear train that meshes with the first gear train A rotating member; and a driving device that rotates the rotating member along the indicator by rotating the rotating member through a driving shaft. In a pointer-type instrument mounted on a vehicle, the rotating member is moved to the moving member. The direction of the self-weight and the direction in which the meshing depth is increased coincide with each other at a position where force is exerted in a direction in which the meshing depth between the first and second gear trains is deepened by the self-weight. A characteristic pointer-type instrument. The pointer-type instrument according to claim 1, wherein the moving member is circular or annular, and the rotating member is arranged on an imaginary line extending in a diameter direction thereof. 3. The pointer-type meter according to claim 2, wherein the moving member has an annular shape having a first gear train on an inner peripheral portion, and the rotating member is disposed on the inner peripheral portion of the moving member. . The pointer-type instrument according to claim 2, further comprising an urging unit that presses the moving member in a direction in which the engagement depth of the first gear train with respect to the second gear train is increased. 2. A restricting means for restricting a meshing depth of the first gear train and the second gear train is provided on a rotating shaft of the rotating member or the driving device for rotating the rotating member. The indicated pointer-type instrument.

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