JP5233501B2 - Rotating operation type electronic component and electronic device equipped with the same - Google Patents

Description

  The present invention relates to a rotary operation type electronic component used in an input operation unit of an in-vehicle electronic device such as a car audio and an electronic device equipped with the same.

  In recent years, in order to ensure the safety of vehicle drivers and passengers, there is an increasing demand for safety improvements in various in-vehicle electronic devices.

  A conventional rotary operation type encoder as a rotary operation type electronic component used in the input operation unit of such an electronic device will be described with reference to FIG.

  FIG. 10 is a cross-sectional view of a conventional rotary operation type encoder. In FIG. 10, reference numeral 1 denotes an insulating resin case having an upper opening, and a pair of fixed contacts 2 for a push-on switch are provided at the center of the bottom of the opening recess. Although not shown in detail, a contact pattern 3 for an incremental encoder is formed on the bottom surface of the outer peripheral position of the cylindrical cylindrical wall 1A provided so as to surround the peripheral position. . Each terminal 4 electrically connected to the fixed contact 2 and the contact pattern 3 is extended outward from the case 1.

  The pair of fixed contacts 2 for the push-on switch includes a central fixed contact 2A disposed in the center and an outer fixed contact 2B disposed on the outer side with a space therebetween, and an outer peripheral portion on the outer fixed contact 2B. Is mounted, and a movable contact 5 having a central portion facing the central fixed contact 2A at a distance is combined. Further, on the outer peripheral part of the movable contact 5, an elastic body 6 made of silicon rubber or the like provided with a central cylindrical part 6A and a conical part 6B having a downward opening from the lower part of the cylindrical part 6A is placed. The position of the shape portion 6B is regulated by the inner surface of the cylindrical wall 1A to constitute a push-on switch portion.

  Reference numeral 7 denotes a rotating body having a circular flange portion 7B below the cylindrical portion 7A, and the central hole is provided in a non-circular hole shape. A slider 8 is provided on the lower surface of the flange portion 7B, and the tip of the slider 8 is elastically contacted with the contact pattern 3 of the case 1 to constitute an incremental encoder unit.

  Reference numeral 9 denotes a bearing in which the lower surface of the flange portion 9B is placed on the upper surface of the case 1, and has a cylindrical portion 9C that protrudes upward in a substantially cylindrical shape at the center, and below the inner hole 9A. The part has a large diameter. A cylindrical portion 7A of the rotating body 7 is rotatably combined with the large diameter portion.

  Reference numeral 10 denotes an operation portion 10A located above the bearing 9, and below the operation portion 10A is a substantially rod-shaped rotating shaft inserted from above into the bearing 9 bore 9A. The circular intermediate portion 10B is fitted, and the rotary shaft 10 can be rotated and moved up and down. Further, the engaging portion 10C below the intermediate portion 10B is inserted into the non-circular hole of the driving piece 11 in an engaged state, and the lower end thereof is in contact with the upper surface of the cylindrical portion 6A of the elastic body 6. The rotating shaft 10 is biased upward by the elastic force of the elastic body 6.

  The drive piece 11 is caulked and fixed to the engaging portion 10C of the rotary shaft 10 and is positioned in the cylindrical portion 7A of the rotary body 7, and the drive piece 11 is biased upward. 11 is also urged upward and pressed against the inner surface of the cylindrical portion 7A of the rotating body 7. Thus, the rotating shaft 10 is engaged with the rotating body 7 in a biased state by the elastic force of the elastic body 6, and the rotating body 7 is rotated via the drive piece 11 when operated to rotate. ing.

  Reference numeral 12 denotes a click leaf spring, and its bent portion is in elastic contact with the uneven portion provided on the upper surface of the flange portion 7B, and the bent portion of the leaf spring 12 slides on the uneven portion by the rotation of the rotating body 7. Click moderation.

  And the cover 13 is attached so that the case 1 may be held from the upper surface of the collar part 9B of the bearing 9 mounted on the upper surface of the case 1, and the conventional rotary operation type encoder is comprised.

  In the above configuration, when the operating portion 10A of the rotating shaft 10 is rotated, the rotating body 7 is rotated via the drive piece 11 that is caulked and fixed to the lower engaging portion 10C, and on the lower surface of the flange portion 7B of the rotating body 7. The provided slider 8 slides on the contact pattern 3 of the case 1, and a pulse signal is obtained from the corresponding terminal 4 of the incremental encoder section. A click moderation is generated by the leaf spring 12 that slides on the concavo-convex portion provided on the upper surface of the flange portion 7B as the rotating body 7 rotates.

  When the operating portion 10A is pressed, the rotary shaft 10 moves downward, and the lower engaging portion 10C and the driving piece 11 fixed thereto are moved downward in the non-circular central hole of the rotating body 7. It moves, the engagement state of the rotating shaft 10 and the rotary body 7 is cancelled | released, and the upper surface of the cylindrical part 6A of the elastic body 6 in contact with the lower end is pressed. When the force exceeds a predetermined pressing force, the conical portion 6B of the elastic body 6 is elastically buckled and the center portion of the movable contact 5 is pressed by a projection provided on the lower surface of the cylindrical portion 6A. Thus, the central portion contacts the central fixed contact 2A facing each other. As a result, the outer fixed contact 2B and the central fixed contact 2A are electrically connected, and the push-on switch portion is turned on. Note that the rotating body 7 remains stopped when the rotary shaft 10 is moved in the vertical direction during the pressing operation.

  Further, as shown by a broken line in FIG. 10, when this rotary operation type encoder is mounted on an electronic device, an operation knob 40 is attached to the operation unit 10A of the rotary shaft 10, and the use of the electronic device The operator rotates the operation knob 40 to activate the incremental encoder unit, and presses the operation knob 40 to activate the push-on switch unit, and each signal obtained by these operations associates the electronic device. Operate the function to the desired state.

  In many cases, the amount of protrusion of the operation knob 40 from the operation panel surface is set to about 13 to 17 mm so that the user can easily operate the operation knob 40.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2005-302354 A

  As a safety measure in the event of an accident such as a vehicle collision in a rotary operation type electronic component used in the input operation unit of such an in-vehicle electronic device, human injury due to an operation portion protruding from the operation panel surface of the electronic device In order to prevent this, in-vehicle electronic devices in Europe are required so that the amount of protrusion of the operation knob 40 from the operation panel surface is not more than a specified amount (9.5 mm).

  However, since the operation knob 40 operated by the user is difficult to be operated by the user when the protruding amount is equal to or less than the predetermined amount, the operation knob 40 is often protruded from the operation knob 40, and an excessive load is applied to the operation knob 40. Therefore, it is necessary that the protruding operation knob 40 sinks below a specified amount.

  However, in the rotary operation type encoder as the conventional rotary operation type electronic component, when an excessive load is applied to the operation knob 40, the rotary shaft 10 only moves downward by the operating distance of the push-on switch portion. However, it was not possible to absorb the sinking allowance with the rotary operation type electronic component. For this reason, a mechanism for absorbing the sinking allowance must be provided on the electronic device side, but there is a problem that the electronic device side is often difficult to cope with due to space saving and high mounting density.

  The present invention solves such a conventional problem, and when the excessive load is applied to the operation portion, the rotation operation type can secure the sinking amount of the operation portion on the rotation operation type electronic component side. It is an object to provide an electronic component and an electronic device on which the electronic component is mounted.

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

The invention according to claim 1 of the present invention supports a rotary shaft having a substantially cylindrical operation portion to which an operation knob is mounted at an upper end portion of a rod-shaped intermediate portion, and the intermediate portion of the rotation shaft. comprising a bearing, a rotating operation type electronic component which generates an electrical signal by rotating the above operation portion of the rotary shaft, the bearing is a predetermined dimension from the upper end of the bearing that is projected to the intermediate portion annular cladding portion is provided in the cylindrical outer circumference of the lower position, the rotary shaft, an inner wall of the upper end portion and the operating portion of the intermediate portion being formed integrally through a connecting portion of the thin-walled, the The operation portion has an inner diameter larger than the outer diameter of the annular build-up portion, and the lower end of the inner surface of the operation portion is the outermost portion of the annular build-up portion at the lower end position of the vertical movement of the rotating shaft. It is located below the radial position, and the vertical thickness of the connecting part is the annular shape. It has been most thin at outer position than the outer diameter of the tubular portion of the above the overlaid portion, for a given load or greater from the axis direction of the rotary shaft exerted on the operation unit, broken at the connecting portion The rotary operation type electronic component is characterized in that the operation portion where the connecting portion of the rotary shaft is broken and the operation knob is mounted sinks due to an excessive load. Therefore, it is possible to eliminate the need to provide a mechanism for absorbing the sinking amount of the operation knob on the mounted electronic device side.

The invention according to claim 2 is an electronic device configured by mounting the rotary operation type electronic component according to claim 1, wherein the operation knob mounted on the operation unit of the rotation operation type electronic component is: There is a stepped recess having a lower opening in the center, and the lower part from the stepped part of the stepped recess is fitted into the operation part. An electron having a large diameter, wherein the space in the concave portion above the stepped portion serves as a relief portion of the upper end portion of the intermediate portion of the rotating shaft after fracture at the connecting portion. When an excessive load is applied to the operation knob of the electronic device and the connecting part of the rotary shaft of the rotary operation type electronic component breaks, the operation knob sinks without being affected by the intermediate shaft, etc. Has the effect of being able to

  As described above, according to the present invention, the operation portion that protrudes when an excessive load more than a predetermined value is applied sinks, so that the rotation amount of the operation knob of the mounted electronic device can be secured. An advantageous effect of providing an operation-type electronic component and an electronic device on which the operation-type electronic component is mounted can be obtained.

  Hereinafter, the rotary operation type electronic component of the present invention will be described with reference to FIGS. 1 to 9 by taking a rotary operation type encoder as an example, as in the prior art. 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 1)
FIG. 1 is a cross-sectional view of a rotary operation type encoder according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view of an essential part of an electronic device equipped with the rotary operation type encoder, and FIG. It is principal part sectional drawing of the state which was depressed.

  In FIG. 1, reference numeral 1 denotes an insulating resin case having an upper opening. A central fixed contact 2A and an outer fixed contact 2B for a push-on switch are provided at the center of the bottom of the opening recess, and the pair of fixed contacts 2 (2A, 2A, A contact pattern 3 for an incremental encoder is formed on the bottom surface of the outer peripheral position of the cylindrical wall 1A provided so as to surround the peripheral position 2B). Each terminal 4 extending from the fixed contact 2 (2A, 2B) and the contact pattern 3 is extended to the outside of the case 1.

  The outer peripheral portion of the movable contact 5 facing the central fixed contact 2 </ b> A with the central portion being spaced is placed on the outer fixed contact 2 </ b> B, and on the outer peripheral portion of the movable contact 5, the central cylindrical portion 6 </ b> A and A conical portion 6B of an elastic body 6 provided with a conical portion 6B having a lower opening is placed on the lower portion thereof, and the position of the conical portion 6B is regulated by the inner peripheral surface of the cylindrical wall 1A to constitute a push-on switch portion. Has been. Reference numeral 7 denotes a resin-made rotating body having a circular flange portion 7B below the cylindrical portion 7A and having a central hole formed in a non-circular hole shape. An incremental encoder unit is configured by allowing the slider 8 positioned on the lower surface of the flange portion 7B to be elastically contacted on the contact pattern 3 of the case 1.

  The flange 21B of the bearing 21 is placed on the upper surface of the case 1, and the rotating body 7 is placed on the lower large diameter portion of the middle hole 21A in the cylindrical tubular portion 21C formed to project upward at the center position. A cylindrical portion 7A is rotatably combined.

  The rotary shaft 22 having the upper end operating portion 22A, the substantially rod-shaped intermediate portion 22B, and the engaging portion 22C below the intermediate portion 22B positioned above the bearing 21 has a circular cross-section of the intermediate portion 22B of the bearing 21. The lower end of the lower engaging portion 22C inserted and engaged with the non-circular hole of the driving piece 11 is fitted and supported so as to be rotatable and vertically movable at the upper portion of the middle hole 21A is the upper surface of the cylindrical portion 6A of the elastic body 6 Abut. Further, the drive piece 11 is caulked and fixed to the engaging portion 22 </ b> C of the rotating shaft 22 and is positioned in the cylindrical portion 7 </ b> A of the rotating body 7.

  The rotating shaft 22 is biased upward by the elastic force of the elastic body 6, and the rotating shaft 22 engages with the rotating body 7 via the drive piece 11 coupled thereto, and the rotating shaft 22 rotates. When operated, the rotating body 7 is configured to rotate via the drive piece 11.

  Further, the cover 13 is held so that the bent portion of the leaf spring 12 fixed to the lower surface of the bearing 21 comes into elastic contact with the uneven portion on the upper surface of the flange portion 7B of the rotating body 7 and holds the case 1 from the upper surface of the flange portion 21B of the bearing 21. It is attached and integrated as a whole.

  The above is the same as the conventional rotary operation type electronic component. However, according to the present embodiment, the length of the cylindrical portion 21C of the bearing 21 and the coupling between the intermediate portion 22B and the operation portion 22A of the rotary shaft 22 are the same. The structure of the parts is different.

  That is, in the bearing 21, the length of the cylindrical portion 21C is set slightly longer than the conventional one, and the relationship between the intermediate portion 22B of the rotating shaft 22 and the operation portion 22A is fitted and supported by the bearing 21. The upper end portion of the intermediate portion 22B protruding from the inner hole 21A serves as a connecting portion 22D and is connected to the inner wall portion of the substantially cylindrical operation portion 22A. The connecting portion 22D has a substantially circular circular plate shape, and is formed so that the thickness in the vertical direction becomes thinner toward the outer edge of the circle and is connected to the operation portion 22A. Note that the thickness of the thinnest portion provided in a ring shape is uniform over the entire circumference.

  The thinnest position of the connecting portion 22D is set to be a location larger than the outer diameter of the cylindrical portion 21C of the bearing 21. Therefore, the inner diameter of the substantially cylindrical operation portion 22A is also larger than the outer diameter of the cylindrical portion 21C of the bearing 21.

  Since the operation of the rotary operation type encoder configured in this way is the same as that of the conventional one, description thereof is omitted.

  Next, an electronic apparatus that includes a rotary operation type encoder as the rotary operation type electronic component of the present invention will be described.

  In FIG. 2, reference numeral 32 denotes a wiring board on which the rotary operation type encoder is fixed by soldering. An operation knob 30 is attached to the operation portion 22A of the rotary operation type encoder, and the operation knob 30 is connected to the operation panel 31 of the electronic device. The upper part protrudes. The operation knob 30 protrudes from the operation panel 31 by about 15 mm, which is a dimension that is easy for a user of an electronic device to pinch with a finger.

  The operation knob 30 has a stepped recess 30A having a lower opening at the center of the lower surface, and is fitted so that the lower side from the stepped portion of the stepped recess 30A covers the outer periphery of the operation unit 22A of the operation type encoder. . The recess above the step is formed so that the inner diameter is the same as or larger than the inner diameter of the operation portion 22A, and the depth is deeper than the sinking amount of the operation knob described later.

  The electronic apparatus having the above-described configuration is used by rotating the operation knob 30 to operate the incremental encoder unit of the rotary operation type encoder and operating the push-on switch unit by pressing the same as in the past. .

  In this manner, the rotary operation type encoder mounted on the electronic device is configured such that when an excessive load more than a predetermined amount from the axial direction of the rotary shaft 22 is applied to the operation knob 30 portion, the rotary shaft 22 The thinnest portion of the connecting portion 22D is broken, and the operation knob 30 can sink into the operation panel 31 together with the operation portion 22A as shown in FIG. In addition, as the stop position, as shown to the figure, it is good to set it as the structure which the lower end of 22 A of operation parts contact | abut on the predetermined location on the bearing 21, and is stopped.

  At this time, the stepped portion of the stepped recess 30A of the operation knob 30 is in contact with the upper surface of the operation unit 22A. As described above, the inner diameter of the recess above the stepped portion is equal to the inner diameter of the substantially cylindrical operation unit 22A. Since the depth of the concave portion having the same diameter or larger than that of the step portion and a depth deeper than the required sinking amount of the operation knob 30 is configured to be an excessive load. When the connecting portion 22D is broken, the operating knob 30 and the operating portion 22A sink downward without being affected by the cylindrical portion 21C of the bearing 21, and the connecting portion remaining at the upper end of the intermediate portion 22B of the rotating shaft 22 The upper surface of 22D does not hit the operation knob 30. And since the length of the cylindrical part 21C of the bearing 21 is longer than the conventional thing as mentioned above, the amount of sinking of the operation knob 30 can also be secured sufficiently. If the diameter of the relief portion is set, it is preferable that there is a clearance from the position of the connecting portion 22D that is broken by an excessive load that is greater than or equal to a predetermined value, but at least the diameter setting is larger than the position of the connecting portion 22D that is broken by the load. The structure of the escape part made may be sufficient.

  As described above, according to the present embodiment, when an excessive load is applied to the operation knob 30 (the operation portion 22A of the rotating shaft 22), the connection portion 22D is broken and the operation knob 30 sinks greatly. The amount of protrusion of the operation knob 30 from the surface of the operation panel 31 can be reduced. At this time, if the length of the cylindrical portion 21C of the bearing 21 is set in accordance with the required sinking amount of the operation knob 30, it is possible to cope with it. It is not necessary to provide a structure for absorbing.

  In addition, it is good also considering the connection part 22D which connects 22 A of operation parts of the rotating shaft 22, and the intermediate part 22B as the form shown in FIG.

  That is, as shown in FIG. 4, a plurality of through holes 25E are provided at equal intervals along the circumferential direction in the connecting portion 25D that connects the operating portion 25A and the intermediate portion 25B of the rotating shaft 25 as shown in FIG. It is in the form. In the illustrated example, four through-holes 25E are provided, and the connecting portion 25D is connected at four positions at intervals of 90 degrees. The number of connecting portions 25D, the shape of the through holes 25E, and the like may be appropriately determined in consideration of the set value of the load at which the connecting portions 25D break.

  Even if it has the said through-hole 25E, it can comprise in what is fractured | ruptured by the said connection part 25D with respect to the load more than the predetermined from the axial direction of the rotating shaft 25 applied to the operation part 25A. In the case of the rotary shaft 25 having this configuration, the thickness of the connecting portion 25D does not have to be extremely thin, so that the management of the rotary shaft 25 is easy to manage, and the components of the rotary shaft 25 alone are used. Since damage due to a load partially applied to the connecting portion 25D during handling can be reduced, it is possible to expect an effect that the handling efficiency of the rotating shaft 25 is excellent and the production efficiency is improved.

  In the above description, two configuration examples have been described. However, the two ideas may be combined.

  Furthermore, in FIGS. 1 to 4 of the above description, the upper surfaces of the operation portions 22A and 25A of the rotary shafts 22 and 25 are cylindrical in shape such that the outer peripheral portions that are outside the thin connection portions 22D and 25D protrude upward. However, as shown in the cross-sectional view of the main part of FIG. 5, the rotary shaft 27 may be formed by die casting made of zinc alloy or the like, and the upper surface of the operation portion 27A of the rotary shaft 27 may be planar.

  With the configuration of the rotary shaft 27 made of this zinc die-casting, there is little deformation at a predetermined strength in normal use and there is no breakage of the connecting portion 27D, but when an excessive load due to impact or the like is applied, the connection is made thin. Since it is preferable in terms of material to be broken at the portion 27D and the upper surface of the operation portion 27A has a simple shape, the structure of the die casting mold can be simplified.

  And if it is the structure of this rotating shaft 27, since it can form in the same surface from the upper surface outer periphery end of the operation part 27A to the root of the connection part 27D made thin, in the ring-shaped range wider than what was mentioned above, It is preferable that it can be incorporated in the engaged state with the operation knob 33.

(Embodiment 2)
The second embodiment will be described below. In addition, the same code | symbol is attached | subjected to the part of the same structure as Embodiment 1, and detailed description is abbreviate | omitted.

  FIG. 6 is a cross-sectional view of the main part of the rotary operation type encoder according to the second embodiment of the present invention. In FIG. An annular build-up part 26A is provided in a projecting manner. The annular built-up portion 26A has a vertical cross section protruding in an arc shape, and the arcuate horizontal apex portion is the maximum outer diameter position, and the lower portion is formed on an inclined surface toward the outer periphery of the cylindrical portion 26C. .

  Reference numeral 28 denotes a rotating shaft, and a substantially cylindrical operation portion 28A is provided at the upper end of an intermediate portion 28B protruding upward from the cylindrical portion 26C of the bearing 26 via a connecting portion 28D. The inner diameter is larger than the outer diameter of the annular built-up portion 26A of the bearing 26, and the thinnest position of the thinnest portion of the connecting portion 28D is provided at an outer position than the outer diameter of the cylindrical portion 26C of the bearing 26. It has been.

  And the lower end position of the inner surface of the operation portion 28A is a position below the maximum outer diameter position of the annular build-up portion 26A at the lower end position of the vertical movement in which the rotary shaft 28 has moved downward by the operating distance of the push-on switch portion. It is provided to become. An operation knob 30 indicated by a broken line is attached to the operation unit 28A.

  In a state where the push-on switch portion is not provided, that is, a rotary operation type encoder in which the rotary shaft does not move up and down, the bottom end position of the inner surface of the operation portion is the maximum of the annular overlay portion in a normal state where no load is applied. Any position below the outer diameter position may be used.

  Since the operation of the rotary operation type encoder according to the embodiment configured as described above is the same as that of the conventional one, the description thereof is omitted.

  Next, a rotary operation type encoder mounted on an in-vehicle electronic device or the like is arranged in the axial direction of the rotary shaft 28 when an accident such as a vehicle collision occurs when the electronic device is mounted on an inclined dashboard surface. On the other hand, it is assumed that an excessive load is applied to the operation portion 28A from the direction inclined with respect to the operation portion 28A. Below, the case where the excessive load which exceeds assumption in such a state is added to 28 A of operation parts is demonstrated.

  FIG. 7 is a cross-sectional view of the main part of the rotary operation type encoder in a state where the connecting portion is about to be broken by a load from an oblique direction. As shown in FIG. 7, the push-on is first performed by the load from the oblique direction indicated by an arrow. After the rotary shaft 28 sinks by the operating distance of the switch part, the operation part 28A is subjected to a load with the center of the upper end of the intermediate part 28B as the inclined axis while the connecting part 28D having the weakest mechanical strength is partially broken. The side sinks, and the other side is inclined to float.

  In this state, the lower end of the inner surface of the operation portion 28A on the side where the load is applied is positioned below the maximum outer diameter position of the annular built-up portion 26A of the bearing 26. That is, the operation portion 28A has an inner surface slightly above the lower end of the inner surface in contact with the inclined surface on the lower side of the annular build-up portion 26A. Here, the lower inclined surface is provided in an inclined state where the lower end of the inner surface of the operation portion 28A is not in contact with the above state.

  When a further load is applied, the partially broken connecting portion 28D is completely broken and the operation portion 28A is separated from the intermediate portion 28B, and the contact portion of the inner periphery of the operation portion 28A slides on the inclined surface. The operation unit 28A falls downward. Also at this time, the lower end of the inner surface of the operation portion 28A does not come into contact with the downward inclined surface, so that the moving state is made smooth.

  Since the connecting portion 28D is set to be completely broken at the outer position from the outer diameter of the cylindrical portion 26C of the bearing 26, in the final state, as shown in the cross-sectional view of the main portion in FIG. The protruding portion 26C is protruded upward, and the outer peripheral surface of the broken connecting portion 28D comes into contact with the annular built-up portion 26A and stops.

  Here, the projecting position of the annular built-up portion 26A of the bearing 26 is provided at a position below the upper end of the cylindrical portion 26C by a predetermined dimension so as to secure a sinking amount of the operation knob 30 of the mounted electronic device. .

  In order to secure this amount of sinking, the relevant dimensions are set so that the breaking position of the connecting portion 28D is located outside the maximum outer diameter of the annular built-up portion 26A, and the first embodiment described above. As described in (refer to FIG. 3), the lower end of the operation portion 28 </ b> A that falls downward may come into contact with a predetermined portion of the bearing 26 to stop the operation portion 28 </ b> A.

  As described above, according to the present embodiment, the operating portion 28A of the rotating shaft 28 is inclined and the connecting portion 28D is broken due to an excessive load from the direction inclined with respect to the axial direction of the rotating shaft 28. In addition, since the inner surface portion of the operation portion 28A is shifted downward so as to come into contact with and slide on the lower inclined surface of the annular built-up portion 26A of the bearing 26, the lower end of the inner surface of the operation portion 28A is inserted into the outer peripheral surface of the bearing 26. The connecting portion 28D can be completely broken even by a load from an oblique direction, and the operation portion 28A can sink.

  In addition to the above-described configuration in which the annular built-up portion 26 </ b> A protrudes from the bearing 26, the configuration shown in the cross-sectional view of the main part in FIG. 9 may be used.

  9 uses a rotary shaft 29 having an arcuate chamfer at the lower end of the inner surface of the operation portion 29A connected to the upper end of the intermediate portion 29B via a connecting portion 29D. Other components are the same as those described in the first embodiment.

  Also with this configuration, the operation portion 29A is inclined with respect to an excessive load from the direction inclined with respect to the axial direction of the rotary shaft 29, and the lower end of the inner surface abuts the outer peripheral surface of the cylindrical portion 21C of the bearing 21. However, since the arc-shaped chamfer is provided there, the lower end of the inner surface of the operation portion 29A is shifted downward without entering the outer peripheral surface of the cylindrical portion 21C of the bearing 21, and the connecting portion 29D is completely broken. Thus, the operation unit 29A can sink.

  Further, although not shown, an inclined surface may be provided at the lower end on the inner surface of the operating portion of the rotating shaft. The inclined surface of the operating portion when the connecting portion of the rotating shaft is partially broken by an excessive load from the oblique direction and the operating portion is inclined, and the lower end of the inner surface abuts the outer peripheral surface of the cylindrical portion of the bearing. It is only necessary to set the angle to be substantially the same as the inclination, and the lower end of the inner surface is shifted downward so as to abut against the outer peripheral surface of the cylindrical part, and if the connecting part is completely broken, the operation part sinks downward. You can

  In any of the above, the rotating shaft may be formed by die casting, and the upper surface of the operation portion may be formed in a planar shape, in the same manner as described in the cross-sectional view of the main part in FIG. 5 of the first embodiment.

  In addition, the present invention is not limited to the rotary operation type encoder with the push-on switch unit described above, but a rotary operation type encoder configured to be capable of only the rotation operation and other rotary operation types. The present invention can be applied to any electronic component, or even a component other than a rotary operation type, as long as it has a configuration in which an operation knob is attached to the operation unit.

  The rotary operation type electronic component according to the present invention and the electronic device on which the rotary operation type electronic component is mounted have an operation knob of the electronic device to be mounted when the operation part of the rotary operation type electronic component sinks when an excessive load exceeding a predetermined value is applied. Therefore, it is useful for an input operation unit of an in-vehicle electronic device such as a car audio.

Sectional drawing of the rotary operation type encoder by the 1st Embodiment of this invention Cross-sectional view of the main parts of an electronic device equipped with the same rotary operation type encoder Cross-sectional view of the main parts of an electronic device with the operation knob depressed Top view of another form of rotating shaft Sectional drawing of the principal part of the rotary operation type encoder provided with the rotating shaft of another form Sectional drawing of the principal part of the rotary operation type encoder by the 2nd Embodiment of this invention Sectional view of the main part of the rotary operation type encoder in a state where the connecting part is about to be broken by a load from the same oblique direction Sectional drawing of the principal part of the rotary operation type encoder in a state where the connecting portion is completely broken from the state of FIG. Cross-sectional view of the main part of a rotary operation type encoder having an arc-shaped chamfer at the lower end on the inner surface of the operation unit Cross section of a conventional rotary operation encoder

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1A Cylindrical wall 2 Fixed contact 2A Center fixed contact 2B Outer fixed contact 3 Contact pattern 4 Terminal 5 Movable contact 6 Elastic body 6A Cylindrical part 6B Conical part 7 Rotating body 7A Cylindrical part 7B Flange part 8 Slider 11 Drive piece 12 leaf spring 13 cover 21 and 26 bearing 21A middle hole 21B collar 21C and 26C cylindrical part 22,25,27,28,29 rotating shaft 22A, 25A, 27A, 28A, 29A operation part 22B, 25B, 28B, 29B Intermediate part 22C Engaging part 22D, 25D, 27D, 28D, 29D Connection part 25E Through hole 26A Annular build-up part 30, 33 Operation knob 30A Stepped recess 31 Operation panel 32 Wiring board

Claims (2)

A rotation shaft having a substantially cylindrical operation portion to which an operation knob is mounted at an upper end of a rod-shaped intermediate portion; and a bearing supporting the intermediate portion of the rotation shaft, and the operation portion of the rotation shaft is A rotary operation type electronic component that generates an electrical signal by rotating operation, wherein the bearing has an annular build-up portion on an outer periphery of a cylindrical portion at a position below a predetermined dimension from an upper end of the bearing from which the intermediate portion protrudes is provided, the axis of rotation, the inner wall of the upper end portion and the operating portion of the intermediate portion are integrally formed through the connecting portion of the thin, the operating section, an inner diameter the annular cladding portion The lower end of the inner surface of the operation portion is located below the maximum outer diameter position of the annular build-up portion at the lower end position of the vertical movement of the rotary shaft, The thickness in the vertical direction is the outer diameter of the cylindrical part above the annular cladding part. Have been most thin in Risotokata position, for a given load or greater from the axis direction of the rotary shaft exerted on the operation unit, rotation operation, characterized in that is adapted to break at the connecting portion Type electronic components. An electronic device comprising the rotary operation type electronic component according to claim 1, wherein the operation knob mounted on the operation unit of the rotary operation type electronic component has a stepped recess having a downward opening in the center. The lower part of the stepped recess is fitted into the operation part, and the inner diameter of the concave part above the step is made larger than the connecting part position that breaks at a predetermined load or more. The electronic device is characterized in that the space in the concave portion above is configured as a relief portion of the upper end portion of the intermediate portion of the rotating shaft after breaking at the connecting portion.

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