JP2005302354A - Rotation pressing operation type electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation pressing operation type electronic component capable of obtaining a signal corresponding torespective operation by rotating or pressing down an operation shaft around an operation shaft, having reduced shaft looseness of an operation shaft. <P>SOLUTION: The rotation pressing operation type electronic component is so constructed that a middle part of an operating axis 61 is held with a top-end inner wall of a small-diameter round hole 51B of an upper cylindrical part 51 of a cover member 50, an engagement protrusion 71B of a transmission member 71 incorporated in a lower part of the operating axis 61 is inserted into a window part 43 of a rotor 41, and its outer periphery end is held with an inner wall of a large-diameter round hole 51A linked to a lower part of the small-diameter round hole 51B. Thereby, the operating shaft 61 can be held at two up-and-down points against the same upper cylindrical parts 51 alone, realizing the component with a smaller necessary accumulated combination size and less shaft looseness. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary press operation type electronic component that is used in an input operation unit of various electronic devices and can obtain a signal accompanying each operation by rotating or pushing down one operation shaft.

  2. Description of the Related Art In recent years, various types of operation forms have been used as electronic components that constitute input operation units of various electronic devices. Then, when the space for the input operation unit is limited, such as in-vehicle equipment, a rotary press operation type electronic device that can obtain a signal associated with each operation by rotating or depressing one operation shaft. Parts are often used.

  Such a conventional rotary pressing operation type electronic component will be described with reference to FIG.

  FIG. 5 is a cross-sectional view of a conventional rotary pressing operation type electronic component. In FIG. 5, reference numeral 1 denotes a lower case made of resin, and a switch portion 2 is formed at a central position in a recess of an upper opening. A plurality of elastic brushes 11 are arranged around the switch unit 2. Reference numeral 1A denotes a cover plate disposed below the lower case 1 in order to close a through hole of the lower case 1 that is required when the elastic brush 11 is formed.

  The switch unit 2 includes an outer fixed contact 3A and a center fixed contact 3B, a movable contact 4 made of a thin metal plate disposed in a normally connected state on the outer fixed contact 3A, and a dome body 5 made of rubber or the like. When the dome body 5 is pressed and buckled from above, the central movable portion 4A disposed in the inclined state of the movable contact 4 is pushed and contacts the central fixed contact 3B facing the lower surface thereof. To do. As a result, the fixed contacts 3A and 3B are electrically connected via the movable contact 4, and when the pressing force is removed, the dome body 5 and the central movable portion 4A are restored as shown in FIG. It becomes the composition of.

  Reference numeral 12 denotes a rotating body made of a resin that is rotatably disposed in the recess of the lower case 1, and the lower surface of the ring-shaped flange portion 12 </ b> A disposed outside the switch portion 2 has a detailed illustration. Although omitted, the rotating contact body 10 made of a thin metal plate formed in a pattern capable of obtaining a predetermined output by an incremental encoder or the like is fixed. Each of the elastic brushes 11 is in elastic contact with the rotating contact body 10. Further, a moderation generating mechanism is configured by elastically contacting a leaf spring on the upper surface of the flange portion 12A formed on the radial uneven portion.

  A cylindrical portion 12B projecting upward is formed on the inner peripheral side of the flange portion 12A, and a groove portion 12C having a constant width extending in the axial direction, that is, the vertical direction is opposed to the inner wall of the cylindrical portion 12B. A pair is provided.

  A transmission member 15 coupled to the lower end of the operation shaft 16 is inserted into the cylindrical portion 12B of the rotating body 12, and the transmission member 15 is placed on the dome body 5 of the switch portion 2. The transmission member 15 includes a pair of engaging protrusions 15A protruding sideways, and each of the engaging protrusions 15A has an axis line in a pair of grooves 12C formed on the inner wall of the cylindrical portion 12B of the rotating body 12. It is arranged so that it can move up and down in the direction, and the outer peripheral end of each engaging projection 15A is regulated at the bottom of each groove 12C.

  Reference numeral 20 denotes a cover member that is mounted on the lower case 1 by being held together with the lower case 1 and the cover plate 1A by the metal cover 21 from above so as to cover the upper opening portion of the lower case 1.

  The cover member 20 has an upper cylindrical portion 20A serving as a bearing portion projecting upward, and the rotation is performed in such a manner that the inner wall restricts the position of the large-diameter circular hole 20B below the central hole. The cylindrical portion 12B of the body 12 is positioned so as to be rotatable. Further, the upper part of the central hole of the upper cylindrical portion 20A is formed in a small circular hole 20C, and the operation shaft 16 is held by the thin circular hole 20C so that an intermediate cylindrical part can be rotated and pushed down. In order to prevent the operating shaft 16 from coming off upward, the retaining spring 17 locked in the recess at the bottom of the operating shaft 16 contacts the intermediate step portion 20D between the large-diameter circular hole 20B and the small-diameter circular hole 20C. It is regulated by contact. A leaf spring forming a part of the moderation generating mechanism is also fixed to the cover member 20.

  As described above, the conventional rotary pressing operation type electronic component is configured.

  Next, the operation will be described. When the operation shaft 16 is rotated, the transmission member 15 fixed to the lower end of the operation shaft 16 rotates together, and the inner wall of the cylindrical portion 12B of the rotating body 12 is engaged by the engagement protrusion 15A of the transmission member 15. The rotating body 12 is rotated together by pushing the groove portion 12C formed in the above-mentioned direction in the operated rotation direction. Along with this, the elastic contact position of the elastic brush 11 with respect to the rotary contact body 10 on the lower surface of the flange portion 12A is changed, and a signal accompanying the rotation operation is generated.

  On the other hand, when the operating shaft 16 is pushed down by applying a pressing operation force, each engaging projection 15A of the transmission member 15 is operated while moving downward in each groove portion 12C provided in the axial direction on the inner wall of the cylindrical portion 12B. The shaft 16 is lowered, the dome body 5 is buckled through the transmission member 15 coupled to the lower end thereof, and the switch unit 2 is put into an operating state as described above. When the pressing force is removed, the dome body 5 and the like are restored to the original shape, the conduction state of the switch unit 2 is released, and the operation shaft 16 is pushed up to the original position. At this time, the operation shaft 16 is stopped in the state shown in FIG. 5 because the retaining spring 17 is brought into contact with the intermediate step portion 20D in the upper cylindrical portion 20A and the position thereof is restricted upward.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP-A-10-149748

  However, in the above-described conventional rotary pressing operation type electronic component, the operation shaft 16 is held so that the middle cylindrical portion can be rotated and pushed down by the small circular hole 20C of the upper cylindrical portion 20A disposed in the cover member 20. However, in the lower part, the outer peripheral end of the engaging protrusion 15A of the transmission member 15 coupled to the lower end of the operation shaft 16 is received at the bottom of the groove 12C of the rotating body 12, and the rotating body 12 is received by the cover member 20. Since the upper cylindrical portion 20A is held and regulated by the inner wall of the large-diameter circular hole 20B, the necessary combination dimensions and the like are accumulated, and the backlash of the operation shaft 16 may occur.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a rotary pressing operation type electronic component that can reduce the backlash of the operation shaft.

  In order to achieve the above object, the present invention has the following configuration.

  According to the first aspect of the present invention, there is provided a lower case made of an insulating resin having a switch portion at the center position of the bottom surface of the recess of the upper opening, and a rotary operation type element portion or elastic brush disposed around the switch portion. And a cover member provided with an upper cylindrical portion serving as a bearing portion coupled so as to cover the opening of the lower case, and rotatably supported in the concave portion of the lower case, and engaged with the element portion An intermediate portion is held rotatably and depressible by a rotary body provided on the lower surface of the flange portion with an elastic brush or a rotary contact body that engages with the elastic brush, and a central hole of the upper cylindrical portion of the cover member. An operating shaft for operating the switch unit; and a transmission member coupled to a lower portion of the operating shaft and engaged with the rotating body when the operating shaft rotates. Is the upper cylindrical shape of the cover member A window portion that penetrates in a radial direction is provided in a portion located inside, and an engagement protrusion disposed on the transmission member is engaged in the window portion in an inserted state, and an outer peripheral end of the engagement protrusion is the cover member This is a rotary press operation type electronic component held movably on the inner wall of the upper cylindrical portion.

  With this configuration, in addition to the intermediate portion of the operation shaft, the outer peripheral end of the engagement protrusion of the transmission member integrated with the lower portion of the operation shaft is also held by the inner wall of the upper cylindrical portion of the cover member. Therefore, there is an effect that the operation required axis can be accumulated little and the operation shaft can be made small.

  According to a second aspect of the present invention, in the first aspect of the invention, each of the window portion of the rotating body and the engaging protrusion of the transmission member is trapezoidal in shape in a top view with an upper base shorter than a lower base in a side view. The slopes of the engaging projections are engaged with each other, and the movement of the engaging protrusions in the window portion can be made smooth when the operation shaft is pushed down. .

  In the rotary pressing operation type electronic component of the present invention, the outer peripheral ends of the engaging protrusions of the transmission member integrated with the intermediate portion of the operation shaft and the lower portion of the operation shaft are respectively positioned in the upper and lower positions in the upper cylindrical portion of the cover member. Since the structure is held and restricted by this, there is an effect that a combination of required combination dimensions is small and a small shaft backlash can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of the prior art, and detailed description is simplified.

(Embodiment)
FIG. 1 is a cross-sectional view of a rotary pressing operation type electronic component according to an embodiment of the present invention, FIG. 2 is a side view before a rotating body and a transmission member are combined, and FIG. FIG. 4 is a side view of a state in which the rotating body and the transmission member are combined, and FIG.

  In the figure, reference numeral 30 denotes a resin lower case, in which the switch portion 2 is disposed at the center position in the recess of the upper opening, and the surroundings thereof are not shown in detail, but a predetermined type such as an incremental encoder is omitted. A rotary contact pattern 31 that can provide an output is configured. And the cylindrical wall 30A is provided in the position used as the boundary of both. The inner peripheral side of the cylindrical wall 30A also functions as a position restricting portion to the side of the movable contact 4 and the dome body 5 of the switch portion 2. In addition, since the arrangement | positioning state of the movable contact 4 with respect to the outer side fixed contact 3A and the center fixed contact 3B of the switch part 2 and the operation state in the switch part 2 are the same as the conventional one, description is abbreviate | omitted.

  And 41 is resin-made by the flange part 41A inner periphery formed in circular ring shape being rotatably hold | maintained by cylindrical wall 30A outer periphery, and the outer peripheral lower surface of flange part 41A being supported by the bottom part of the lower case 30 The elastic brush 32 that is a rotating body and engages with the rotating contact pattern 31 is mounted on the lower surface of the flange portion 41A by squashing the boss 41B (see FIG. 2). In addition, the radial uneven | corrugated | grooved part is distribute | arranged to the flange part 41A upper surface, and the point generation | occurrence | production mechanism is comprised by making a leaf | plate spring elastically contact with it, and is the same as the conventional case.

  Further, a cylindrical portion 41C is formed on the inner peripheral side of the flange portion 41A so as to project upward, and in this cylindrical portion 41C, window portions 43 penetrating in the radial direction in a side view are provided at intervals of 90 °. It is arranged. As shown in FIG. 2 and the like, each of the window portions 43 has an upper end having a trapezoidal shape in which the upper base is shorter than the lower bottom, and opens the lower side with the same size as the lower base connected to the lower portion. It consists of the straight part provided in this way. In addition, the window part 43 should just be arrange | positioned by the equiangular position of at least three places.

  Reference numeral 50 denotes a resin cover member coupled to the lower case 30 by a metal cover 21 so as to cover the upper opening portion of the lower case 30. The cover member 50 is an upper cylindrical shape protruding upward at a central position. A unit 51 is provided.

  A lower portion of the central hole of the upper cylindrical portion 51 is configured as a large-diameter circular hole 51A, and the cylindrical portion 41C of the rotating body 41 is accommodated in the large-diameter circular hole 51A. The large-diameter circular hole 51A is connected to the upper small-diameter circular hole 51B that functions as a bearing portion, and the upper end of the cylindrical portion 41C of the rotating body 41 is positioned upward on the lower surface of the intermediate step portion 51C. There are regulations.

  A metal operation shaft 61 is inserted into the narrow circular hole 51B from above, and an intermediate cylindrical portion is held so that it can be rotated and pushed down by the upper inner wall of the thin circular hole 51B. .

  A transmission member 71 is coupled to and integrated with a lower portion of the operation shaft 61. In this state, the oval shape portion 61A below the operation shaft 61 formed in the oval shape corresponding to the oval shape hole 71A (see FIG. 4) at the center of the transmission member 71 is inserted, and the lower end thereof is caulked. Thus, the transmission member 71 is coupled to the operation shaft 61 without rattling. Note that the transmission member 71 may be coupled to the operation shaft 61 with a scissors or the like.

  Further, a resin cap member 72 is coupled to the lower end of the operation shaft 61 so as to cover the crimped portion of the operation shaft 61, and the lower surface of the cap member 72 is placed in contact with the dome body 5. If the cap member 72 is interposed and the caulking portion of the operation shaft 61 is not brought into direct contact with the dome body 5 as in the configuration, the dome body 5 can be prevented from being broken.

  Further, on the outer peripheral portion of the transmission member 71, an engagement protrusion 71 </ b> B that protrudes to the side is arranged corresponding to the arrangement position of the window portion 43 formed on the rotating body 41. Each engaging projection 71B is inserted into each window portion 43 in the radial direction, and each of the outer peripheral ends thereof is movable on the inner wall of the large-diameter circular hole 51A in the upper cylindrical portion 51 of the cover member 50. Is held directly on.

  As shown in FIG. 2 and the like, each of the engagement protrusions 71B has substantially the same shape as that of the window 43, that is, a trapezoidal portion where the upper base on the upper end side is shorter than the lower base, and the lower part below the upper part. It consists of a straight section with the same dimensions as the bottom.

  The operation shaft 61 is urged slightly upward by the urging force of the dome body 5, and the hypotenuse portion of the trapezoidal shape portion of the transmission member 71 corresponds to a corresponding window portion as shown in FIG. The position is controlled upward by contacting the oblique side portion of the trapezoidal portion 43. In the above state, a predetermined gap is maintained between the transmission member 71 and the upper bottom of the window 43. The dotted line shown in FIG. 3 indicates the position of the engagement protrusion 71B in a state where the operation shaft 61 described later is pushed down.

  Here, a method of combining the operation shaft 61, the rotating body 41, and the transmission member 71 will be briefly described. First, with the operating shaft 61 inserted from above the upper cylindrical portion 51 of the cover member 50, it is turned upside down, and the cylindrical portion 41C of the rotating body 41 is inserted into the large-diameter circular hole 51A and combined. Subsequently, the transmission member 71 is inserted while aligning the direction of the oval hole 71 </ b> A with respect to the oval part 61 </ b> A of the operation shaft 61. At this time, each of the engaging projections 71B is positioned by each window portion 43 of the rotating body 41, and the outer peripheral ends thereof are regulated by the inner wall of the large-diameter circular hole 51A, so that the transmission member 71 can be inserted, so that workability is improved. It is good. After inserting the transmission member 71, the lower end of the operation shaft 61 is crimped to integrate the transmission member 71 with the operation shaft 61, the cap member 72 is attached, and the work in progress is combined with the lower case 30. And

  Next, the operation of the rotary press operation type electronic component of the present invention having the above configuration will be described.

  When the operation shaft 61 is rotated, the transmission member 71 integrated with the lower portion of the operation shaft 61 and the engagement protrusions 71B of the transmission member 71 are inserted into the window portion 43 to be engaged. The body 41 rotates around.

  At this time, the transmission member 71 is held by the inner wall of the large-diameter circular hole 51 </ b> A of the upper cylindrical portion 51 so that the outer peripheral ends of the engagement protrusions 71 </ b> B arranged at four equiangular positions are movable. Because it is rotating in a smooth state.

  In addition, the rotating body 41 in which the upper position is regulated on the lower surface of the intermediate step portion 51C and the inner periphery of the flange portion 41A is held by the outer periphery of the cylindrical wall 30A disposed in the lower case 30 is also smooth and lower case. Rotates with little misalignment with respect to 30.

  At the time of this rotation operation, when viewed from the operation shaft 61 side, the outer peripheral ends of the engaging protrusions 71B of the transmission member 71 integrated with the intermediate portion of the operation shaft 61 and the lower portion of the operation shaft 61 are formed in the upper cylindrical shape. The upper end inner wall of the small-diameter circular hole 51B in the portion 51 and the inner wall of the large-diameter circular hole 51A connected to the lower side of the small-diameter circular hole 51B are rotated while being held respectively at two upper and lower positions. Rotates with little accumulation of required dimensions and little shaft play.

  As the rotating body 41 rotates, the elastic brush 32 mounted on the lower surface of the flange portion 41A slides on the rotating contact pattern 31 to generate a signal associated with the rotating operation.

  On the other hand, when a pressing operation force is applied to the operation shaft 61, the operation shaft 61 moves downward together with the transmission member 71 and the cap member 72 while the intermediate portion is held by the upper end inner wall of the small-diameter circular hole 51B. Also at this time, the outer peripheral ends of the respective engaging projections 71B arranged on the transmission member 71 are along the inner wall of the large-diameter circular hole 51A of the cover member 50 and are individually straight lines of the window portions 43 provided in the lower openings. The guide shaft is moved to the position indicated by the dotted line in FIG. 3 with respect to the lower axial direction, so that the operation shaft 61 is unlikely to be rattled or scratched. In particular, since the upper sides of the window portions 43 and the engagement protrusions 71B are trapezoidal and the hypotenuses are locked to each other, the operation shaft 61 smoothly moves downward including the initial movement.

  As the operation shaft 61 moves downward, the dome body 5 is pushed by the cap member 72, and when the reversal operation force is exceeded, the dome body 5 buckles and the switch unit 2 is operated.

  When the pressing force is removed, the dome body 5 and the like return to their original shapes and the conduction state of the switch unit 2 is released, and the operating shaft 61 is moved via the cap member 72 by the upward biasing force of the dome body 5. It will be pushed up. Also at this time, the operation shaft 61 held by the upper end inner wall of the small-diameter circular hole 51B has the outer peripheral end of each engaging projection 71B of the transmission member 71 coupled to the lower part along the inner wall of the large-diameter circular hole 51A. In addition, since each of the engagement protrusions 71B is guided by the straight portion of each window portion 43, the movement state of the operation shaft 61 is stable. The operation shaft 61 returns to the original state shown in FIG. 1, which is stably stopped by the engagement protrusions 71 </ b> B having upper end sides formed in trapezoidal shapes and the oblique sides of the window portions 43 engaging with each other. . In addition, since the position of the rotating body 41 is restricted upward on the lower surface of the intermediate step portion 51C in the upper cylindrical portion 51, there is no unnecessary upward movement or the like when the oblique sides are locked. Even during the return movement of the operation shaft 61 upward, the operation shaft 61 moves while being held at two points in the upper cylindrical portion 51, so that the operation shaft 61 may be rattled or scratched. It is the same as in the depressed state that it is difficult to occur.

  As described above, the rotary pressing operation type electronic component according to the present invention can be of high quality with little backlash of the operation shaft 61 during operation.

  The rotary contact pattern 31 may have a configuration of element units other than the incremental encoder, and the switch unit 2 is not limited to the configuration described above.

  Further, as in the conventional case, an elastic brush may be provided around the switch portion 2 of the lower case 30 and a rotary contact body engaged with the flange portion 41A of the rotary body 41 may be fixed.

  The rotary pressing operation type electronic component according to the present invention is configured so that the outer peripheral end of the engagement protrusion of the transmission member integrated with the intermediate portion of the operation shaft and the lower portion of the operation shaft is positioned vertically in the upper cylindrical portion of the cover member. Since each structure is held and regulated, it has the effect that there is little accumulation of required combination dimensions and a small shaft backlash can be obtained, and various electronic devices that are used by rotating or pushing down one operating shaft This is useful when configuring an input operation unit of a device.

Sectional drawing of the rotation press operation type electronic component by one embodiment of this invention Side view before combining the rotating body, which is the main part, and the transmission member Side view of a state in which the rotating body, which is the main part, and a transmission member are combined Top view of the transmission member Sectional view of a conventional rotary press operation type electronic component

Explanation of symbols

2 Switch part 3A Outer fixed contact 3B Center fixed contact 4 Movable contact 5 Dome body 21 Metal cover 30 Lower case 30A Cylindrical wall 31 Rotating contact pattern 32 Elastic brush 41 Rotating body 41A Flange part 41B Boss 41C Cylindrical part 43 Window part 50 Cover member 51 Upper cylindrical part 51A Large diameter circular hole 51B Small diameter circular hole 51C Intermediate step part 61 Operation shaft 61A Oval part 71 Transmission member 71A Oval hole 71B Engagement protrusion 72 Cap member

Claims (2)

Covers the lower case made of insulating resin, which has a switch part at the center of the bottom surface of the concave part of the upper opening and is provided with a rotary operation type element part or elastic brush, and the opening of the lower case. A cover member having an upper cylindrical portion serving as a combined bearing portion, and an elastic brush that is rotatably supported in the recess of the lower case and engages with the element portion or a rotary contact that engages with the elastic brush A rotating body provided with a body on the lower surface of the flange portion, and an operation shaft for operating the switch portion when the intermediate portion is held rotatably and depressible in the central hole of the upper cylindrical portion of the cover member; A transmission member coupled to a lower portion of the operating shaft and engaged with the rotating body when the operating shaft rotates, and the rotating body is positioned in an upper cylindrical portion of the cover member. Penetrates in the radial direction And an engaging projection arranged on the transmission member is engaged in the window portion, and the outer peripheral end of the engaging projection is movable on the inner wall of the upper cylindrical portion of the cover member. Rotating and pressing operation type electronic component held in Each of the window portion of the rotating body and the engaging protrusion of the transmission member includes a portion formed in a trapezoidal shape in which the upper base is shorter than the lower base on the upper end side in a side view, and the oblique sides are engaged with each other. The rotary pressing operation type electronic component according to claim 1.

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