JP2007303833A - Movement structure for measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movement structure for a measuring instrument capable of making the indication accuracy of a pointer improved and capable of making assemblability satisfactory. <P>SOLUTION: A dust discharge direction for dust discharge groove parts 30, 30 provided between guide protrusion parts 27, 27 and guide protrusion parts 28, 28 is provided along a direction that coincides with the direction of making side edge parts 11a, 11a of a plate spring member 11 slide with elastic deformation, as shown by an arrow mark in Fig., with respect to a bottom face part 24a of a lower case 24 of a casing member. The dust discharge groove parts 30, 30 provided between guide protrusion parts 27, 27 and the guide protrusion parts 28, 28 have a clearance amount where dust 12 can be inserted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention mainly relates to an instrument movement structure used in a vehicle.

  Conventionally, an instrument movement structure as shown in FIGS. 22 to 25 is known (see, for example, Patent Document 1).

  First, in terms of configuration, in this conventional instrument movement structure, a casing member 1 to be mounted on the back side of an instrument circuit board 4 provided in an instrument mounted on a vehicle includes a lower case 2 and an upper case. 3 is mainly configured.

  In the casing member 1, an electric motor 6 that generates a rotational driving force with the core member 5 by supplying electric power, and a reduction gear group 7 that decelerates the rotational driving force of the electric motor 6 are provided. .

  The casing member 1 is provided with a rotating shaft member 8.

  The rotating shaft member 8 is inserted through the tip 8a from the shaft hole 2a provided in the lower case 2 toward the instrument surface side to pivotally support the pointer 9, and to the reduction gear group 7, The meshing final gear member 10 is integrally fixed and is rotatably supported by the casing member 1, and the rotational driving force of the electric motor 6 is transmitted through the reduction gear group 7 and the final gear member 10. The pointer 9 is configured to rotate by being transmitted to the rotating shaft member 8.

  In addition, between the front end surface 10a of the final gear member 10 provided integrally with the rotating shaft member 8 and the periphery of the shaft hole 2a, the rotating shaft member 8 is elastically moved in the axial extending direction. A supporting plate spring member 11 is provided.

  The leaf spring member 11 is housed inside an annular wall portion 2b that is formed in a substantially square annular shape around the shaft hole 2a with which the leaf spring member 11 is abutted, and is curved in the longitudinal direction. The front end surface 10a is urged toward the rear end portion 8b in the direction of the rotary shaft member 8 by exhibiting the shape.

  Next, the operation of this conventional instrument movement structure will be described.

  In this conventional instrument movement structure, when a drive signal is input to the electric motor 6 provided in the casing member 1, the rotational driving force generated between the electric motor 6 and the core member 5 causes the electric motor 6 to move. The needle 9 is rotated and transmitted to the rotary shaft member 8 through the reduction gear group 7 and the final gear member 10 to rotate the pointer 9 to a desired angle.

Further, even if the vibration of the vehicle on which this instrument is mounted is transmitted to the pointer 9 or the casing member 1, the final gear member 10 fixed to the rotating shaft member 8 by the leaf spring member 11 is used. Since the front end surface 10a is urged toward the rear end portion 8b in the direction of the rotating shaft member 8, rattling is suppressed and the indication stability of the pointer 9 can be improved.
JP 2002-340631 A (paragraphs 0024 to 0055, FIGS. 1 and 2)

  In the conventional instrument movement structure configured as described above, the leaf spring member 11 is housed inside the annular wall portion 2b formed to project in a substantially square annular shape as shown in the partial enlarged view in FIG. As a result, contamination such as dust, cloth, fibers, etc. that has entered during assembly, or this leaf spring member 11 is brought into sliding contact with the lower case 2 or the front end surface 10a of the final gear member 10 Dust such as abrasion powder of the synthetic resin material that accumulates accumulates.

  Such dust or the like is interposed between the inner side surface of the annular wall portion 2b and the side edge portions 11a and 11a of the leaf spring member 11 to inhibit smooth elastic deformation of the leaf spring member 11. There was a risk of it.

  For this reason, the set load of the leaf spring member 11 becomes larger than the target load, and there is a possibility that the indication of the pointer 9 may be defective or the operation may be defective.

  Further, as shown in FIG. 23, it is known that a stopper member 13 that regulates the rotation angle of the rotation shaft member 8 is integrally formed.

  In such a case, at the time of injection molding, as indicated by an arrow in the figure, the entire annular wall portion 2b generates sink marks 14 in the direction of the stopper member 13 and is thus formed into an accurate substantially square annular shape. It was difficult.

  For this reason, the sliding resistance associated with the deformation of the leaf spring member 11 does not become a target value, which is unstable, and there is a possibility that the indication of the pointer 9 is defective or the operation is defective.

  Further, as shown in FIG. 24, there is a problem that sink marks 2d and 2d are generated on the surface 2c of the lower housing 2 where the annular wall portion 2b is formed, and the annular wall portion 2b has the shaft hole. If it is arranged close to 2a, there is a problem that the molding accuracy of the rotating shaft guide tube portion 2e extending from the shaft hole 2a is lowered and the dimensional stability is impaired.

  As shown in FIGS. 24 and 25, the upper end edge 2f of the annular wall 2b is formed at a position lower than the upper end surface 2g of the mating surface of the lower housing 2.

  For this reason, the leaf spring member 11 must be inserted and mounted up to a predetermined position inside the annular wall portion 2b by the air vacuum device 15 or manually by the assembling worker. It is difficult to say that it is good, and as indicated by a two-dot chain line in FIG. 24 or FIG. 25, there is a possibility that the leaf spring member 11 rolls or is assembled outside the annular wall portion 2b. In this respect as well, there is a possibility that an indication failure of the pointer 9 or an operation failure may occur.

  Accordingly, an object of the present invention is to provide a movement structure for an instrument that can improve the pointing accuracy of the pointer and improve the assemblability.

  In order to achieve the above object, the invention described in claim 1 is configured such that a part of a rotating shaft member that pivotally supports a pointer is rotatably inserted from a shaft hole provided in the casing member, An instrument movement structure in which a leaf spring member that elastically supports the turning shaft member in an axial extending direction is provided between the turning shaft member and the periphery of the shaft hole, wherein the leaf spring member An instrument movement structure in which a plurality of independent guide projections are provided along the outer edge of the leaf spring member around the shaft hole with which the contact is made.

  Further, according to a second aspect of the present invention, a dust discharge groove portion having a gap amount through which dust can be inserted is provided between the guide protrusions, and the dust insertion direction of the dust discharge groove portion is 2. The instrument movement structure according to claim 1, wherein a side edge portion of the leaf spring member is made to coincide with a sliding direction with respect to the casing member by elastic deformation.

  Further, according to a third aspect of the present invention, a stopper member for restricting a rotation angle of the rotation shaft member is formed integrally with the at least one guide protrusion, and at least one other guide protrusion. The instrument movement structure according to claim 1 or 2, wherein the height is extended to the vicinity of the height position of the peripheral wall portion of the casing member.

  According to a fourth aspect of the present invention, a backlash preventing protrusion is integrally formed around the shaft hole, and the top of the backlash preventing protrusion is placed close to the leaf spring member. The instrument movement structure according to any one of claims 1 to 3, wherein the instrument movement structure is provided so as to project.

  Further, according to a fifth aspect of the present invention, the guide protrusion formed on the side edge of the leaf spring member is a columnar guide protrusion having a cylindrical shape, and the columnar guide protrusion is engaged. The instrument movement structure according to any one of claims 1 to 4, wherein a semicircular cutout portion to be joined is formed at a side edge portion of the leaf spring member.

  Further, according to a sixth aspect of the present invention, in any one of the first to fifth aspects, a guide inclined surface portion that guides the insertion of the leaf spring member is formed in a part of the guide projection portion. It features the instrument movement structure described in the section.

  Further, according to a seventh aspect of the present invention, a shaft insertion hole through which the rotating shaft member is inserted is formed at a substantially central portion in the longitudinal direction of the leaf spring member, and around the shaft insertion hole, A bulging portion that bulges in the width direction of the leaf spring member is integrally formed to project, and the bulging portion is engaged with a part of the guide projection portion so that an in-plane of the leaf spring member The movement structure for an instrument according to any one of claims 1 to 6 is characterized in that a recess that allows movement in the outward direction and restricts movement in the surface extending direction is formed.

  Further, in the present invention, a shaft insertion hole through which the rotating shaft member is inserted is formed at a substantially central portion in the longitudinal direction of the leaf spring member, and around the shaft insertion hole, A bulging portion that bulges in the width direction of the leaf spring member is formed so as to project integrally, and the bulging portion is engaged with a gap formed between the guide projection portions, thereby the leaf spring member. The movement structure for an instrument according to any one of claims 1 to 6, wherein movement in an in-plane and outward direction is allowed and movement in a surface extending direction is restricted.

  According to the first aspect of the present invention configured as described above, the independent guide protrusion provided around the shaft hole with which the leaf spring member abuts is provided along the outer edge of the leaf spring member. The leaf spring member is guided.

  Since each of the guide protrusions is formed independently, dust or the like is not easily collected.

  For this reason, it is possible to improve the indication accuracy of the pointer by reducing the possibility of the indication failure or the malfunction of the pointer.

  Further, according to a second aspect of the present invention, the dust discharge groove provided between the guide protrusions has a gap amount through which dust can be inserted, and the side edge of the leaf spring member is Due to elastic deformation, the casing member has a dust insertion direction of the dust discharge groove portion in a direction coinciding with the sliding direction.

  For this reason, there is no possibility that dust is pushed out from the dust discharge groove and accumulated due to elastic deformation of the side edge portion of the leaf spring member.

  Further, according to a third aspect of the present invention, when the leaf spring member is assembled, the leaf spring member is extended along the guide projection portion extended to the vicinity of the height position of the peripheral wall portion of the casing member. Positioning is performed by abutting against a guide protrusion formed integrally with a stopper member that is inserted and restricts the rotation angle of the rotation shaft member.

  For this reason, even if it does not insert the said leaf | plate spring member to a desired position, it is positioned and mounted | worn in the abutted state, Therefore Assembling property can be made favorable.

  According to a fourth aspect of the present invention, an anti-rattle projection is integrally formed around the shaft hole such that the top of the anti-rattle projection is close to the leaf spring member. Yes.

  For this reason, the amount of elastic deformation of the leaf spring member can be adjusted by changing the height position of the crown, and a desired urging force can be easily obtained.

  Further, by forming the top of the head in conformity with the shape of the leaf spring, the stability in the abutting state can be improved, and the accuracy of indicating the pointer can be improved.

  Further, in the present invention, the cylindrical guide protrusion is engaged with the semicircular cutout formed on the side edge of the leaf spring member. The leaf spring member can be guided to a desired mounting position and mounted.

  According to a sixth aspect of the present invention, the insertion of the leaf spring member is guided along a guide inclined surface portion formed in a part of the guide protrusion.

  For this reason, the assembly property can be further improved.

  Further, according to a seventh aspect of the present invention, when the leaf spring member is mounted with the bulging portion engaged with a recess formed in a part of the guide projection, a desired mounting position is provided. The concave portion can guide the leaf spring member and can be easily attached.

  Further, in the mounted state, movement of the leaf spring member in the in-plane and outward directions is allowed, so that a desired urging force can be exerted by smooth elastic deformation.

  Furthermore, the movement of the leaf spring member in the surface extending direction is restricted, and the pointing accuracy of the pointer can be improved.

  Then, the stress around the shaft insertion hole is dispersed and not concentrated by the bulging portion integrally formed around the shaft insertion hole. For this reason, even if the leaf spring member is formed thin, a desired elastic reaction force can be easily obtained.

  Further, according to the eighth aspect of the present invention, when the bulge portion is engaged with a gap formed between the guide projection portions and the leaf spring member is mounted, the bulge portion is moved to a desired mounting position. The leaf spring member is guided by the guide protrusions located on both sides.

  For this reason, the said leaf | plate spring member can be easily attached to the said casing member.

  Further, in the mounted state, movement of the leaf spring member in the in-plane and outward directions is allowed by the gap, so that a desired urging force can be exhibited by smooth elastic deformation.

  Further, the movement of the leaf spring member in the surface extending direction is restricted by the guide protrusions located on both sides of the gap, so that the indication accuracy of the pointer can be improved.

  Then, the stress around the shaft insertion hole is dispersed and not concentrated by the bulging portion integrally formed around the shaft insertion hole. For this reason, even if the leaf spring member is formed thin, a desired elastic reaction force can be easily obtained.

  Next, an instrument movement structure according to the best mode for carrying out the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said prior art example.

  1 to 9 show a movement structure for an instrument according to the preferred embodiment of the present invention.

  First, the overall configuration will be described with reference to FIGS. 2 to 4. The instrument movement 16 of this embodiment is an instrument circuit board 4 provided in a combination meter 17 as an instrument mounted on a vehicle. It is to be mounted on the back side.

  The combination meter 17 is mainly configured by arranging a dial 21 provided with a display unit such as various hands 9 in a housing 20 constituted by a lower housing 18 and an upper housing 19.

  As shown in FIG. 4, a front cover member 22 made of transparent synthetic resin is mounted on the front side of the housing 20 so as to cover the dial 21, and on the back side, the instrument The instrument circuit board 4 to which the movement 16 is fixed is mounted.

  The instrument movement 16 has a casing member 23 composed of a lower case 24 and an upper case 25 that are substantially sealed by worship.

  As shown in FIG. 2, in the casing member 23, as shown in FIG. 2, an electric motor 6 that generates rotational driving force with the core member 5 by supplying electric power, and a reduction gear 7 that decelerates the rotational driving force of the electric motor 6. ... a group is provided.

  The casing member 23 is provided with a rotating shaft member 8 that pivotally supports the pointer 9 so as to be rotatable, and a final gear member 10 that meshes with the reduction gear 7 is integrally fixed. ing.

  The rotating shaft member 8 is inserted through the tip portion 8a from the shaft hole 2a provided in the lower case 24 toward the instrument surface side to pivotally support the pointer 9 and rotate around the casing member 23. The rotational driving force of the electric motor 6 is movably supported and is transmitted to the rotary shaft member 8 through the reduction gear group 7 and the final gear member 10 to rotate the pointer 9. It is configured as follows.

  Further, between the front end surface 10a of the final gear member 10 provided integrally with the rotating shaft member 8 and the periphery of the shaft hole 2a, the rotating shaft member 8 extends along the extending direction. A leaf spring member 11 is provided to bias the front end surface 10a of the rotating shaft member 8 toward the upper case 25 and elastically support the rotating shaft member 8.

  A plurality of independent guide protrusions 27, 27 and 28, 28 are provided around the shaft hole 2 a with which the leaf spring member 11 is abutted, along the outer edge of the leaf spring member 11. It has been.

  Next, the effect of the instrument movement structure of this embodiment will be described.

  In the instrument movement structure of the embodiment thus configured, when a drive signal is input from the instrument circuit board 4 to the electric motor 6 provided in the casing member 23, The generated rotational driving force is transmitted to the rotating shaft member 8 through the reduction gear group 7 and the final gear member 10 by rotating the electric motor 6, and the pointer 9 is moved to a desired position. Rotate to an angle.

  The generated rotational driving force with the core member 5 is transmitted to the rotary shaft member 8 through the reduction gear group 7 and the final gear member 10 to rotate the pointer 9 to a desired angle. Move.

  Further, even if the vibration of the vehicle on which the combination meter 17 is mounted is transmitted to the pointer 9 or the casing member 23, the final gear member fixed to the rotating shaft member 8 by the leaf spring member 11. Since the front end surface 10a of 10 is urged toward the rear end portion 8b of the rotating shaft member 8, rattling is suppressed and the indication stability of the pointer 9 can be improved.

  Independent guide protrusions 27, 27 and 28, 28 provided around the shaft hole 2 a with which the leaf spring member 11 abuts are projected along the outer edge of the leaf spring member 11. Therefore, the leaf spring member 11 functions as a guide when the leaf spring member 11 is mounted on the lower case 24, and after the leaf spring member 11 is elastically deformed due to vehicle vibration or the like, it slides into contact with the guide. Is done.

  Moreover, since each said guide protrusion part 27,27 and 28,28 is formed independently, dust etc. are hard to accumulate.

  For this reason, the leaf spring member 11 can be smoothly deformed in a desired manner, and an effective biasing force is applied to the front end surface 10a of the final gear member 10 to cause an indication failure or malfunction of the pointer 9. The indication accuracy of the pointer 9 can be improved.

  1 to 10 show an instrument movement structure of Example 1 of the best mode of the present invention.

  Note that portions that are the same as or equivalent to those in the above-described embodiment are described with the same reference numerals as those in the above-described embodiment.

  First, the configuration of the first embodiment will be described. In the instrument movement structure of the first embodiment, as shown in FIG. 1, the leaf spring member 11 is curved so as to have a substantially arcuate shape in the longitudinal direction. Has been.

  Further, a shaft insertion hole 11b through which the rotating shaft member 8 is inserted is formed at a substantially central portion in the longitudinal direction of the plate spring member 11.

  The guide projections 28, 28 along the longitudinal direction of the leaf spring member 11 have dimensions that are substantially the same as or slightly longer than the longitudinal dimensions of the leaf spring member 11, and as shown in FIG. Projecting with a certain height h1.

  Further, the guide protrusions 28, 28 of the first embodiment are formed with guide inclined surface portions 28a, 28a, which are inclined surfaces for guiding the insertion of the leaf spring member 11, facing downward on the inner side surfaces facing each other. Has been.

  Further, of the guide projections 28, 28, one guide projection 28 located on the peripheral wall 24b side is provided with a stopper member 29 having a substantially triangular shape in plan view for regulating the rotation angle of the rotation shaft member 8. Are integrally formed.

  The stopper member 29 protrudes from the bottom surface portion 24a having a constant height h2 that is higher than the height h1 of the guide protrusion 28, slightly lower than the height h3 of the peripheral wall portion 24b. In addition, the peripheral wall portion 24b and the guide projection portion 28 are integrally formed so as to be connected to a substantially central position in the longitudinal direction.

  The guide protrusions 27 and 27 allow the side edge portions 11 a and 11 a to slide from the side edge portions 11 a and 11 a in the longitudinal direction of the leaf spring member 11 due to elastic deformation of the leaf spring member 11. Similarly, a pair is provided at a certain distance, and is higher than the height h1 of the guide projection 28, slightly lower than the height h3 of the peripheral wall 24b, or constant from the bottom surface 24a. The height h2 is extended to the vicinity of the height position of the peripheral wall portion 24b.

  And between these guide projection parts 27 and 27 and the guide projection parts 28 and 28, the dust discharge groove parts 30 and 30 which have the gap | interval amount which can insert a dust are provided.

  The dust insertion direction of the dust discharge groove 30 is such that the side edge portions 11a, 11a of the leaf spring member 11 are elastically deformed as shown by a two-dot chain line in FIG. 24a is set to coincide with the sliding direction (the direction indicated by the arrow in the figure).

  Further, in the first embodiment, as shown in FIG. 10, the abutting surface portion 29 a is positioned higher than the guide projection portion 28 on the side surface of the stopper member 29 in the direction in which the plate spring member 11 is disposed. Is formed.

  Next, the effect of the instrument movement structure of the first embodiment will be described.

  In the instrument movement structure of Example 1, in addition to the effects of the embodiment, the side edge portions 11a and 11a of the leaf spring member 11 are indicated by two-dot chain lines in FIG. 5 or FIG. In addition, due to elastic deformation, the guide protrusions 27 and 27 and the guide protrusions 28 and 28 are aligned with the bottom surface 24a of the lower case 24 of the casing member 23 in a direction coinciding with the sliding direction indicated by the arrows in the figure. A dust discharge direction of the dust discharge groove portions 30, 30 provided between the two is provided.

  Further, the dust discharge grooves 30, 30 provided between the guide projections 27, 27 and the guide projections 28, 28 have a gap amount through which the dusts 12 can be inserted.

  For this reason, when the rotating shaft member 8 vibrates in the axial extending direction (the direction indicated by the white arrow in FIG. 6) together with the pointer 9 due to vehicle vibration or the like, the leaf spring member 11 is elastically deformed. The side edge portions 11a, 11a of the leaf spring member 11 slide while being guided by the guide protrusions 28, 28 with respect to the bottom surface portion 24a.

  Therefore, the dust 12 is pushed outward from the dust discharge grooves 30 and 30 by the side edges 11a and 11a of the leaf spring member 11, so that the side edges 11a and 11a of the leaf spring member 11 become the bottom surface. There is no possibility of accumulating in the portion slidably contacted with the portion 24a.

  In the first embodiment, as shown in FIG. 10, when the leaf spring member 11 is attached to the bottom surface portion 24 a of the lower case 24 while being adsorbed by using the air vacuum device 15, Since the portion 28 protrudes with a constant height h1 close to the bottom surface portion 24a, it can be easily inserted even in the horizontal direction.

  Next, the leaf spring member 11 is inserted along the guide protrusions 27 and 27 extending to the height h2 position in the vicinity of the height h3 position of the peripheral wall portion 24b of the lower case 24, and In the depth direction, the abutting surface portion 29a formed at a position higher than the guide projection portion 28 in the stopper member 29 that regulates the rotation angle of the rotation shaft member 8 in the depth direction. Next, the adsorbed leaf spring member 11 is abutted and positioned in the front-rear and left-right directions.

  Therefore, the suction by the air vacuum device 15 is released while being separated from the bottom surface portion 24a to a certain extent as shown by the solid line in FIG. 10, and the leaf spring member 11 falls to the top surface of the bottom surface portion 24a. Even if it is made, as shown by the two-dot chain line in the conventional FIG. 24 or FIG. 25, the possibility that the leaf spring member 11 rolls or is assembled outside the annular wall 2b is reduced. And can be placed in a desired mounting position.

  In the first embodiment, the leaf spring member 11 dropped from a certain height is guided by the abutting surface portion 29a of the stopper member 29, the guide projection portions 27 and 27 on both sides, and the guide inclined surface portions 28a and 28a. It falls, reaches the bottom surface part 24a, and fits in a desired mounting position.

  For this reason, not only the machine assembly using the air vacuum device 15 but also the assembly operator can perform assembly manually, and the assembly performance can be improved.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment, and thus description thereof is omitted.

  FIGS. 11 and 12 illustrate a movement structure for an instrument according to Example 2 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1. FIG.

  First, the configuration will be described focusing on the differences from the casing member 23 of the first embodiment. In the lower case 124 constituting the casing member 123 of the second embodiment, around the bottom surface portion 24a side of the shaft hole 2a. Is substantially integrally formed with a ratchet prevention protrusion 40 having a substantially hemispherical shape that brings the leaf spring member 11 and the top of the head 41 close to each other.

  Next, the effect of this Example 2 is demonstrated.

  In the instrument movement structure of the second embodiment, in addition to the operational effects of the embodiment and the first embodiment, the ratchet prevention protrusion 40 is further provided around the shaft hole 2a. Forty hemispherical top portions 41 are formed integrally with the leaf spring member.

  For this reason, the amount of elastic deformation of the leaf spring member 11 can be adjusted by changing the height position of the crown 41, and a desired urging force can be easily obtained.

  Further, since the top portion 41 is formed in a hemispherical shape in accordance with the curved shape of the leaf spring member 11, the stability in the abutting state can be improved, and the pointer The indication accuracy can be improved.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment and Example 1, and thus description thereof is omitted.

  FIGS. 13 and 14 illustrate the instrument movement structure of Example 3 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1,2.

  First, the configuration will be described focusing on the differences from the casing members 23 and 123 of the first and second embodiments. In the lower case 224 that constitutes the casing member 223 of the third embodiment, the leaf spring member 111 to be mounted is arranged. Cylindrical guide protrusions 127 and 127 having a cylindrical shape as the guide protrusions are formed on both side edges 111a and 111a.

  Semicircular cutouts 111b and 111b that engage with the cylindrical guide protrusions 127 and 127, respectively, are formed on both side edges 111a and 111a of the plate spring member 111, respectively.

  Next, the effect of this Example 3 is demonstrated.

  In the instrument movement structure of the third embodiment, in addition to the functions and effects of the embodiment and the first and second embodiments, the semicircular shape formed on the side edge portions 111a and 111a of the leaf spring member 111, respectively. The cylindrical guide projections 127 and 127 are engaged with the notches 111b and 111b.

  As shown in FIG. 14, the guide protrusions 127 and 127 of the third embodiment project upward from the bottom surface 24 a to the vicinity of the height position of the peripheral wall 24 b of the lower case 224.

  Therefore, the leaf spring member 11 can be easily lowered along the guide protrusions 127 and 127 and guided to a desired mounting position on the bottom surface portion 24a to be mounted.

  Further, in a state where the leaf spring member 111 is mounted on the lower case 224, the semicircular cutout portions 111b and 111b of the side edge portions 111a and 111a of the leaf spring member 111 are separated at two positions in the longitudinal direction. Engaged with the cylindrical guide protrusions 127 and 127, the rotation about the rotary shaft member 8 is prevented.

  For this reason, the indication accuracy of the pointer can be further improved.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment and Examples 1 and 2. Therefore, the description thereof is omitted.

  FIGS. 15 and 16 illustrate a movement structure for an instrument according to Example 4 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said embodiment and Examples 1-3.

  First, the configuration will be described focusing on the differences from the casing members 23, 123, and 223 of the first to third embodiments. In the lower case 324 that constitutes the casing member 323 of the fourth embodiment, the stopper member 29 side is arranged. In the vicinity of both ends in the longitudinal direction of the provided guide protrusion 128, guide inclined surface portions 128a and 128a, which are inclined surfaces for guiding the insertion of the leaf spring member 11, are substantially the same height as the abutting surface portion 29a of the stopper member 29. It is formed in the position.

  The guide protrusions 227 and 227 provided on the side edges 111a and 111a side of the plate spring member 111 are provided with guide inclined surface portions 227a and 227a made of inclined surfaces that guide the insertion of the plate spring member 11, respectively. At a position substantially the same as the abutting surface portion 29a of the stopper member 29, and as shown by a white arrow in FIG. 15, the leaf spring member 11 is inclined to expand toward the direction in which it is inserted. Have and formed.

  Next, the effect of this Example 4 is demonstrated.

  In the instrument movement structure of Example 4, in addition to the functions and effects of the embodiment and Examples 1 to 3, the leaf spring member 11 is further adsorbed using the air vacuum device 15 or the like. When assembling to the bottom surface portion 24a of the lower case 324, the guide projection portion 28 on the near side has a constant height h1 close to the bottom surface portion 24a and projects in the same manner as in the first embodiment. As shown by the white arrow in FIG. 15, it can be easily inserted even from a substantially horizontal direction.

  In the left-right direction, the insertion of the leaf spring member 11 is guided along the guide inclined surface portions 227a and 227a formed in a part of the guide projection portions 227 and 227.

  These guide inclined surface portions 227a and 227a are formed to have an inclination that expands in the direction in which the leaf spring member 11 is inserted.

  For this reason, when the leaf spring member 11 is abutted against the abutting surface portion 29a formed at a position higher than the guide projection portion 128, the leaf spring member is opposed to the left and right guide inclined surface portions 128a and 128a. 11. Both corners 11k, 11k on both sides of the front end surface in the insertion direction 11 are guided by these guide inclined surface portions 227a, 227a while being securely placed and positioned in the front-rear and left-right directions to easily reach a desired mounting position. It can be lowered to pay.

  Accordingly, as shown in FIG. 16, the left and right guide inclined surface portions 128a and 128a are separated from each other, and are illustrated between the stopper member 29 and the left and right guide inclined surface portions 128a and 128a. Even if a gap formed so that the abutting member rotating together with the omitted rotating shaft member does not interfere with each other, one of the corner portions 11k and 11k of the leaf spring member 11 falls into the gap. There is no risk that the desired mounting position will not be obtained, such as mounting at an angle, and the corner portions 11k, 11k of the leaf spring member 11 are reliably brought into contact with the left and right guide inclined surface portions 128a, 128a. The position stability at the time of assembly can be improved, and the assembly property can be improved.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment and Examples 1 to 3, and thus description thereof is omitted.

  FIGS. 17 and 18 illustrate an instrument movement structure according to Example 5 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said embodiment and Examples 1-4.

  First, the configuration will be described focusing on differences from the casing member 23 of the first embodiment. In the lower case 424 constituting the casing member 423 of the fifth embodiment, a pair is provided on the stopper member 29 side and the opposite side. On the opposite surface side of the guide projections 128, a recess 228a that allows movement of the leaf spring member 211 in the in-plane and outward directions and restricts movement in the surface extending direction in the vicinity of both ends in the longitudinal direction. , 228a are formed in a recessed manner.

  Further, bulging portions 211b and 211b bulging in the width direction of the leaf spring member 211 from the longitudinal side edge portions 211a and 211a are integrally provided around the shaft insertion hole 11b of the leaf spring member 211. Is formed.

  The bulging portions 211b and 211b are engaged with the recesses 228a and 228a formed in the guide protrusions 128 and 128 in a state where the leaf spring member 211 is mounted, and the leaf spring member 211 Movement in the in-plane and outward directions is allowed, and movement in the surface extending direction is restricted.

  Next, the effect of this Example 5 is demonstrated.

  In the instrument movement structure of the fifth embodiment, in addition to the operational effects of the embodiment and the first to fourth embodiments, the bulging portions 211b and 211b formed on the leaf spring member 211 further include the guide protrusion. It engages with recesses 228a, 228a formed in part of the portions 228, 228.

  Therefore, when the leaf spring member 211 is attached to the lower case 424, the pair of recesses 228a and 228a guide the bulging portions 211b and 211b to the desired attachment position, and the leaf spring member. 211 can be guided to a desired mounting position and easily mounted.

  Further, in the mounted state, the bulging portions 211b and 211b do not interfere with the recesses 228a and 228a, and the movement of the leaf spring member 211 in the in-plane and outward directions is allowed. A desired urging force can be exerted by the elastic deformation.

  Further, the movement of the leaf spring member 211 in the surface extending direction is restricted, and the indication accuracy of the pointer 9 can be improved.

  Then, the area around the shaft insertion hole 11b is increased by the bulging portions 211b and 211b formed integrally projecting around the shaft insertion hole 11b, so that the stress is dispersed and concentrated. do not do. For this reason, even if the leaf spring member 211 is formed thin, a desired elastic reaction force can be easily obtained.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment and Examples 1 to 4, and thus description thereof is omitted.

  19 and 21 illustrate a movement structure for an instrument according to Example 6 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Examples 1-5.

  First, the configuration will be described centering on differences from the casing member 423 of the fifth embodiment. In the lower case 524 constituting the casing member 523 of the sixth embodiment, one pair is provided on the stopper member 29 side and the opposite side. Independently formed guide projections 328 and 328 are formed so as to project at regular intervals.

  The bulging portions 211b and 211b of the leaf spring member 211 are engaged with the gap 330 formed between the guide projections 328 and 328, so that the leaf spring member 211 moves in the in-plane and outward directions. While being allowed, the movement in the surface extending direction is restricted.

  In the sixth embodiment, as shown in FIG. 21, inclined guide surface portions 328a... Are formed on the side surfaces of the stopper members 328 in the direction in which the plate spring members 211 are arranged.

  Next, the effect of this Example 6 is demonstrated.

  In the instrument movement structure of the sixth embodiment, in addition to the operational effects of the embodiment and the first to fifth embodiments, the bulging portions 211b and 221b formed on the leaf spring member 211 further include the guide protrusions. The gaps 330 and 330 formed between the portions 328 and 328 are engaged with each other.

  For this reason, when the leaf spring member 211 is mounted on the lower case 524, the bulging portions 211b and 211b are formed by the two sets of guide protrusions 328, 328 and 328, 328 up to a desired mounting position. The leaf spring member 211 is guided to a desired mounting position and is easily mounted.

  Further, in the mounted state, it is possible to make it difficult to collect the dust 12 by setting the gaps 330 formed between the guide protrusions 328 and 328 to be large. Therefore, the plate spring member 211 can be smoothly elastically deformed to exert a desired urging force.

  Furthermore, the movement of the leaf spring member 211 in the surface extending direction is restricted by the two sets of the guide protrusions 328 and 328 located on both sides, so that the indication accuracy of the pointer 9 can be improved.

  Then, the area around the shaft insertion hole 11b is increased by the bulging portions 211b and 211b formed integrally projecting around the shaft insertion hole 11b, so that the stress is dispersed and concentrated. do not do. For this reason, even if the leaf spring member 211 is formed thin, a desired elastic reaction force can be easily obtained.

  Furthermore, the leaf spring member can be made thin, and the parts material cost and parts processing cost can be reduced.

  Other configurations and operational effects are the same as or equivalent to those of the above-described embodiment and Examples 1 to 5, and thus description thereof is omitted.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  That is, in the first embodiment, the guide protrusions 27 and 27 are provided as a pair independently from the guide protrusions 28 and 28. However, for example, two or more sets or an odd number may be provided. As long as it is independent along the outer edge, the shape, quantity, and material of the guide protrusions 27 and 28 are not particularly limited.

  Further, in the first embodiment, a stopper member 29 having a substantially triangular shape in plan view for restricting the rotation angle of the rotation shaft member 8 is integrally formed on one guide projection portion 28 located on the peripheral wall portion 24b side. However, the present invention is not limited to this, and the shape of the lower case 24 is not particularly limited, such as a configuration in which the stopper member 29 is not provided in the lower case 24.

It is a disassembled perspective view explaining a mode that a leaf | plate spring member is mounted | worn in a lower case by the movement structure for instruments of this invention's best embodiment. It is typical sectional drawing explaining the structure inside a casing by the movement structure for instruments of embodiment. It is a front view of the combination meter in which the movement structure for instrument of embodiment is used. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3 for explaining the internal configuration of the combination meter in which the instrument movement structure of the embodiment is used. It is a partial top view explaining the structure of the principal part of the lower case with which the leaf | plate spring member was mounted | worn with the instrument movement structure of Example 1 of embodiment. It is a typical side view explaining a mode that the vibration was added to the rotating shaft member by the instrument movement structure of Example 1 of an embodiment. It is sectional drawing in the position along the BB line in FIG. 5 by the instrument movement structure of Example 1 of an embodiment. It is a partial top view explaining the structure of the principal part of a lower case by the instrument movement structure of Example 1 of embodiment. FIG. 9 is a cross-sectional view of the instrument movement structure of Example 1 of the embodiment in a state in which a leaf spring member is not mounted at a position corresponding to the position along the line CC in FIG. 8. It is a longitudinal cross-sectional view of the principal part in the position along the EE line in FIG. 8 explaining a mode that a leaf | plate spring member is mounted | worn with the movement structure for instruments of Example 1 of embodiment. It is a partial top view explaining the structure of the principal part of a lower case by the instrument movement structure of Example 2 of embodiment. FIG. 12 is a longitudinal sectional view of a main part at a position along the line FF in FIG. 11 in the instrument movement structure of Example 2 of the embodiment. It is a partial top view explaining the structure of the principal part of a lower case by the instrument movement structure of Example 3 of embodiment. FIG. 14 is a longitudinal sectional view of a main part at a position along the line GG in FIG. 13 in the instrument movement structure of Example 3 of the embodiment. It is a partial top view explaining the structure of the principal part of a lower case by the instrument movement structure of Example 4 of embodiment. FIG. 16 is a longitudinal sectional view of a main part at a position along the line HH in FIG. 15 in the instrument movement structure of Example 4 of the embodiment. It is a partial top view explaining the structure of the principal part of a lower case by the instrument movement structure of Example 5 of embodiment. FIG. 18 is a longitudinal sectional view of a main part at a position along the line II in FIG. 17 in the instrument movement structure of Example 5 of the embodiment. It is a partial top view explaining the structure of the principal part of a lower case by the instrument movement structure of Example 6 of embodiment. FIG. 20 is a longitudinal sectional view of a main part at a position along the line JJ in FIG. 19 in the instrument movement structure of Example 6 of the embodiment. FIG. 20 is a longitudinal sectional view of a main part at a position along the line KK in FIG. 19 in the instrument movement structure of Example 6 of the embodiment. It is the longitudinal cross-sectional view and enlarged sectional view of the movement which explain the movement structure for instruments of one prior art example, and explain the whole structure. It is a partial top view explaining the structure of the principal part of a lower case by the movement structure for instruments of another prior art example. FIG. 24 is a longitudinal sectional view of a main part at a position along the line LL in FIG. 23 in another conventional example of the instrument movement structure. FIG. 24 is a longitudinal sectional view of a main part at a position along the line MM in FIG. 23 in another conventional instrument movement structure.

Explanation of symbols

2a Shaft hole 8 Rotating shaft member 11, 111, 211 Leaf spring member 11a, 111a Side edge portion 11b Shaft insertion hole 12 Dust 23, 123, 223, 323, 423, 523
Casing members 24, 124, 224, 324, 424, 524
Lower case 27, 127, 227, 28, 128, 228, 328
Guide protrusion 29a Abutting surface 30 Dust discharge groove 40 Anti-rattle protrusion 41 Head top 111b, 111b Semi-circular notch 128a, 227a Guide inclined surface 211b, 211b Swelling 228a, 228a Recess

Claims (8)

A part of the rotating shaft member that pivotally supports the pointer is rotatably inserted from the shaft hole provided in the casing member, and the shaft is extended between the rotating shaft member and the periphery of the shaft hole. An instrument movement structure provided with a leaf spring member that elastically supports the rotating shaft member in the installation direction;
An instrument movement structure characterized in that a plurality of independent guide protrusions are provided around an outer edge of the leaf spring member around the shaft hole with which the leaf spring member abuts.   A dust discharge groove portion having a gap amount through which dust can be inserted is provided between the guide protrusions, and the dust insertion direction of the dust discharge groove portion is determined by elastic deformation of the side edge portion of the leaf spring member. The instrument movement structure according to claim 1, wherein the instrument member is made to coincide with a sliding direction with respect to the casing member.   A stopper member for restricting the rotation angle of the rotation shaft member is formed integrally with the at least one guide projection, and the height of the other at least one guide projection is set to the height of the peripheral wall of the casing member. The instrument movement structure according to claim 1, wherein the instrument movement structure extends to the vicinity of a height position.   Around the shaft hole, a rattle-preventing projection is integrally formed, and the top of the rattle-preventing projection is projected so as to be close to the leaf spring member. The instrument movement structure according to any one of claims 1 to 3.   The guide projection formed on the side edge side of the plate spring member is a columnar guide projection having a columnar shape, and a semicircular notch for engaging the column guide projection is formed by the plate spring. The instrument movement structure according to any one of claims 1 to 4, wherein the instrument movement structure is formed on a side edge of the member.   The instrument movement structure according to any one of claims 1 to 5, wherein a guide inclined surface portion that guides insertion of the leaf spring member is formed on a part of the guide projection portion. .   A shaft insertion hole through which the rotating shaft member is inserted is formed at a substantially central portion in the longitudinal direction of the plate spring member, and a bulge that bulges around the shaft insertion hole in the width direction of the plate spring member. The projecting portion is integrally formed to project, and the bulging portion is engaged with a part of the guide projection portion to allow the leaf spring member to move in and out of the surface. The instrument movement structure according to any one of claims 1 to 6, further comprising a recess for restricting movement in the extending direction. A shaft insertion hole through which the rotating shaft member is inserted is formed at a substantially central portion in the longitudinal direction of the plate spring member, and a bulge that bulges around the shaft insertion hole in the width direction of the plate spring member. The protruding portion is integrally formed to project, and the bulging portion is engaged with a gap formed between the guide projections to allow movement of the leaf spring member in the in-plane and outward directions. In addition, the movement structure for an instrument according to any one of claims 1 to 6, wherein movement in a surface extending direction is restricted.

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