JP5158961B2 - Switch device - Google Patents

Description

  The present invention relates to a switch device that includes an operation unit that includes an operation piece and a contact unit that is detachably connected to the operation unit, and that switches a contact of the contact unit by rotating the operation piece.

  As a conventional example of this type of switch device, there has been proposed a configuration in which a cam for ON / OFF operation of a contact is housed on the operation unit side (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-154445

  By the way, when this type of switch device is attached to a mounting plate or the like, it is necessary to separate the operation portion and the contact portion. In such a case, in the conventional example, since the cam for turning the contact ON / OFF is housed on the operation part side, the operation part is separated from the contact part (for example, the operation part and the contact part are separated in the contact OFF state). Then, there is a possibility that the contact is turned on after the separation because the operating force by the cam for turning the contact ON / OFF is lost.

  The present invention has been conceived in view of the above circumstances, and the purpose thereof is to make it possible to separate the operation part from the contact part only when the contact is in the OFF state, and to maintain the contact OFF state even after the separation. It is to provide a switch device in which safety is ensured.

  In order to achieve the above object, the invention according to claim 1 of the present invention comprises an operation part provided with an operation piece, and a contact part detachably connected to the operation part, and is contacted by rotating the operation piece. A switching device for switching the contact of the part, the operation shaft rotating in conjunction with the operation of the operation piece, and being housed in the contact part, and rotating in conjunction with the operation shaft to switch the contact A cam member for operating the contact, and allowing the operating shaft to be pulled out of the cam member for operating the contact when the contact is in an OFF state, and connecting the operating shaft to the contact when the contact is in an ON state. And a retaining mechanism for preventing the operation cam member from being pulled out.

With the above configuration, the operation unit can be separated from the contact unit only when the contact is OFF. Further, since the contact operation cam member is housed in the contact portion, the operation force by the contact operation cam member remains applied to the contact even if the operation portion is separated from the contact portion. Therefore, if the operation part is separated from the contact part in the contact OFF state, the contact OFF state can be maintained even after the separation. As a result, as in the conventional example, it is possible to eliminate a dangerous state that occurs when the operation unit is separated from the contact unit, and to realize a switch device that ensures safety.
Here, the “operation piece” means an operation handle in the case of a normal selector switch, and a key in the case of a selector switch with a key.

  The invention according to claim 2 is the switch device according to claim 1, wherein the retaining mechanism is formed on a fitting protrusion formed on an outer peripheral surface of the operation shaft and the contact operating cam member. A fitting recess into which the fitting protrusion fits, and a closing plate for closing the fitting recess into which the fitting protrusion is fitted, and the fitting protrusion is inserted into the fitting recess in the closing plate. A guide groove is formed to guide the fitting protrusion when pulling out, and the guide groove is formed at a position where the fitting recess and the guide groove communicate only when the contact is in the OFF state. It is characterized by.

  With the above configuration, when the contact is in the OFF state, the fitting recess and the guide groove are in a communication state, and the operation shaft is allowed to be removed from the contact operation cam member. On the other hand, when the contact is in the ON state, the fitting recess and the guide groove do not communicate with each other, the fitting recess into which the fitting protrusion is fitted is closed by the closing plate, and the operation shaft is contacted. Removal from the operating cam member is prevented. Therefore, the retaining mechanism can be configured with a simple configuration.

  According to the present invention, the operation unit can be separated from the contact part only when the contact is in the OFF state, and the contact OFF state is maintained even after the separation, thereby realizing a switch device that ensures safety.

Hereinafter, a selector switch will be described as an example of the present invention, and the following embodiments will be described in detail. Note that the present invention is not limited to the following embodiments.
FIG. 1 is a longitudinal sectional view showing the overall configuration of a selector switch according to an embodiment. The selector switch 1 includes an operation unit 2 and a contact unit 3 that is separably connected to the operation unit 2.

(Configuration of operation unit 2)
The operation unit 2 includes a case 4, and an operation handle (corresponding to an operation piece) 5 for switching contacts is attached to the upper portion of the case 4. An operation shaft 6 that is connected to the operation handle 5 and rotates in conjunction with the rotation of the operation handle 5 is disposed inside the case 4. An annular first cam member 7 is formed on the outer peripheral surface of the operation shaft 6. An annular second cam member 8 is disposed above the first cam member 7, and an annular third cam member 9 is interposed between the second cam member 8 and the first cam member 7. Has been. The second cam member 8 and the third cam member 9 are arranged with the operation shaft 5 on the exterior, respectively.

The second cam member 8 is movable in the axial direction of the operation shaft 6 and is restricted from rotating around the operation shaft 6. As a restricting means for restricting the rotation of the operation shaft 6 around the axis, for example, a restricting projection (not shown) is formed on the outer peripheral surface of the second cam member 8, and a fitting groove (see FIG. (Not shown) may be formed on the inner wall of the case 4.
The third cam member 9 is configured to be movable in the axial direction of the operation shaft 6 and rotatable about the operation shaft 6. A spring receiving portion 4 a is formed in the case 4, and a coil spring 10 that covers the operation shaft 6 is interposed between the spring receiving portion 4 a and the second cam member 8. Thereby, the 2nd cam member 8 is urged | biased toward the 3rd cam member 9 side.

  As shown in FIG. 2, the upper surface of the first cam member 7 constitutes a first cam surface 7A having at least one cam peak 11 in the circumferential direction. The lower surface of the second cam member 8 constitutes a second cam surface 8A having at least one cam peak 12 in the circumferential direction. The upper surface of the third cam member 9 constitutes a third cam surface 9A in which a plurality of cam peaks 13 that can be engaged with the cam peaks 12 of the second cam member 8 are provided at equal intervals in the circumferential direction. The lower surface of the cam member 9 constitutes a fourth cam surface 9B in which a plurality of cam peaks 14 that can be engaged with the cam peaks 11 of the first cam member 7 are provided at equal intervals in the circumferential direction.

Here, the inclination angle of one inclined surface (corresponding to an inclined surface on one side with respect to the circumferential direction) of the cam crest 13 on the third cam surface 9A is θ1, and the other inclined surface (inclined on the other direction side with respect to the circumferential direction). The inclination angle of one cam crest 14 on the fourth cam surface 9B (corresponding to an inclined surface on one side with respect to the same circumferential direction as the circumferential direction) is θ3, When the inclination angle of the other inclined surface (corresponding to the inclined surface on the other direction side in the same circumferential direction as the circumferential direction) is θ4, the cam shape is set so as to satisfy θ4> θ1 and θ2> θ3. Yes. By adopting such a cam shape, it becomes possible to expand the operation angle position where a notch feeling can be obtained to the vicinity of the handle operation angle. The reason for this will be described later.
In this embodiment, in addition to the conditions satisfying θ2> θ3 and θ4> θ1, θ2> θ1 and θ4> θ3 are satisfied (see FIG. 2). By satisfying θ2> θ1 and θ4> θ3, there is an advantage that the cam operation becomes smooth.

  In addition, the cam shape is set so that the inclination angle θ1 and the inclination angle θ3 are substantially equal, and the inclination angle θ2 and the inclination angle θ4 are substantially equal. By adopting such a cam shape, it is possible to make the left and right notch feelings substantially the same. The reason for this will be described later.

(Configuration of contact part 3)
Referring again to FIG. 1, the contact portion 3 has a case 20, and a disc-shaped contact operating cam member 21 is disposed in the case 20. The contact operating cam member 21 is connected to the lower end portion of the operating shaft 6 and is driven to rotate in conjunction with the rotation of the operating shaft 6. The lower surface of the contact operating cam member 21 constitutes a cam surface 21A having at least one cam peak 22 in the circumferential direction. Further, a contact block 23 having a plurality of contact mechanisms is accommodated in the case 20. Each contact mechanism includes a terminal 24 having a fixed contact, a contact plate 26 having a movable contact 25 that can be contacted / separated with the fixed contact, a spring 27 that urges the movable contact 25 in a direction to contact the fixed contact, a contact A protrusion 28 is provided on the plate 26 to contact the cam crest 22 of the contact operating cam member 21 and press the movable contact 25 in a direction to separate from the fixed contact.

  In addition, when a contact is welded by the said contact structure, a welding part can be forcedly opened by operation of the handle | steering-wheel 5, and safety | security is ensured.

(Cam operation by the first cam member 7, the second cam member 8, and the third cam member 9)
Assume that the switch has a 3-notch 3-contact structure. As shown in FIG. 2, the notch position A1 has a contact OFF state, the notch position A2 rotated 45 degrees to the right from the notch position A1 has a contact ON state, and the notch position A1 rotated 45 degrees to the left from the notch position A1. At position A3, the contact is ON.

(1) When the operation handle 5 is rotated from the notch position A1 to the notch position A3 When the operating handle 5 is rotated from the notch position A1 in the left direction X3, the first cam member 7 is also accompanied by the operation shaft 6 in conjunction with this operation. Trying to rotate left X3. At this time, the pressing force F1 in the left direction X3 from the first cam member 7 acts on the third cam member 9 via the contact surface S1 between the cam peak 11 and the cam peak 14. On the other hand, since the rotation of the second cam member 8 is blocked, a rotation blocking force F2 for blocking the leftward rotation acts on the contact surface S2 between the cam peak 12 and the cam peak 13. At this time, since the inclination angle θ4> the inclination angle θ1, the pressing force F1> the rotation prevention force F2, and the third cam member 9 rotates in the left direction X3. As a result, an upward push-up force acts on the second cam member 8 via the contact surface S2. Since this pushing force is greater than the biasing force of the spring 10, the second cam member 8 rises while contacting the cam surface of the third cam member 9. When the top of the second cam crest 13 of the third cam member 8 (the cam crest 13 on the right side in FIG. 2) gets over the top of the cam crest 12 of the second cam member 8, the rotation from the contact surface S2 occurs. Since the stopping force F2 disappears, a notch feeling is obtained. The operation position at which this feeling of notch is obtained is a position rotated from the notch position A1 by the horizontal distance of the slope of the cam crest 13 (the slope having the inclination angle θ1). Therefore, by making the slope of the cam mountain 13 (the slope of the inclination angle θ2) steep, the operation position where the notch feeling can be obtained can be extended to the vicinity of the operation angle of 45 degrees.

  When the top of the second cam crest 13 climbs over the top of the cam crest 12 of the second cam member 8, the second cam member 8 is lowered by the urging force of the spring 10, and the third cam member 9 is moved to the left. It is moved in the direction X3 and led to the notch position A3. Then, as will be described later, when the notch position A3 is reached, contact switching is performed by the contact operating cam member 21.

(2) When rotating from notch position A3 to notch position A1 On the other hand, when operating handle 5 is rotated from notch position A1 in the right direction X4, the first cam member is accompanied by operation shaft 6 in conjunction with this. 7 tries to rotate in the right direction X4. At this time, a pressing force F3 in the right direction X4 from the first cam member 7 acts on the third cam member 9 via the contact surface S3 between the cam peak 11 and the cam peak 14. On the other hand, since the rotation of the second cam member 8 is blocked, a rotation blocking force F4 that blocks the rotation in the right direction X4 acts on the contact surface S4 between the cam peak 13 and the cam peak 12. At this time, since the inclination angle θ2> the inclination angle θ3, the rotation preventing force F4> the pressing force F3. As a result, the third cam member 9 cannot rotate in the right direction X4, and both the third cam member 9 and the second cam member 8 are raised while the cam peak 12 and the cam peak 13 remain engaged. The first cam member 7 rotates in the right direction X4. Then, when the cam crest 11 of the first cam member 7 gets over the top of the second cam crest 14 of the third cam member 9 (the cam crest 14 on the right side in FIG. 2), the rotation from the contact surface S2 is prevented. Since the force F4 disappears, a notch feeling is obtained. The operation position at which this feeling of notch is obtained is a position rotated from the notch position A1 by the horizontal distance of the slope of the cam crest 14 (the slope having the inclination angle θ3). Therefore, by making the slope of the cam crest 14 (the slope of the inclination angle θ4) steep, the operation angle position at which a notch feeling can be obtained can be expanded to the vicinity of the operation angle of 45 degrees.

  When the cam crest 11 climbs over the top of the second cam crest 14, the third cam member 9 and the second cam member 8 are lowered by the urging force of the spring 10, and the first cam member 7 is moved in the right direction X4. To the notch position A2. Then, as will be described later, when the notch position A4 is reached, the contact is switched by the contact operating cam member 21.

  In this way, it is possible to expand the operation angle position at which the feeling of notch is obtained in the left and right operation directions to the vicinity of the operation angle of 45 degrees.

  In addition, in the present embodiment, since the inclination angle θ1 and the inclination angle are set to be substantially equal to θ3, and the inclination angle θ2 and the inclination angle θ4 are set to be substantially equal, the third cam surface 9A and the fourth cam surface 9B and the same cam shape are comprised. Accordingly, the horizontal distance of the slope of the cam mountain 13 (the slope having the inclination angle θ1) is equal to the horizontal distance of the slope of the cam mountain 14 (the slope having the inclination angle θ3), and the operation angle at which a left notch feeling can be obtained. The position is equal to the operation angle position at which a right notch feeling is obtained, and the operation load is substantially equal in both the left and right directions. As a result, the left and right operation feeling can be made equal.

  In the above example, the case where the rotation operation is performed from the notch position A1 to the notch position A3 and the case where the rotation operation is performed from the notch position A3 to the notch position A1 have been described. However, the rotation operation is performed from the notch position A1 to the notch position A2. The same cam operation is performed also in the case of the rotation operation from the notch position A2 to the notch position A1. Therefore, the operation angle position for obtaining the notch feeling when performing the rotation operation in the left-right direction from the notch position A1 can be made substantially equal, and the operation angle position at which the notch feeling can be obtained can be expanded to the vicinity of 45 degrees of the operation angle of the handle. It becomes possible.

(Cam movement of cam member for contact operation)
When the operation handle 5 is rotated as described above, the operation shaft 6 rotates in conjunction with the operation handle 5. Thereby, the contact operation cam member 21 connected to the operation shaft 6 also rotates. As shown in FIG. 3, the cam crest 22 pushes down the contact plate 26 of the contact corresponding to the notch position by the rotation of the contact operating cam member 21. Thereby, the movable contact 25 is separated from the fixed contact, and the contact is turned off. On the other hand, the contact plate 26 has been pushed down by the cam crest 22 until the movable contact 25 and the fixed contact are separated, and the contact plate 26 is lifted by the urging force of the spring 27 by the movement of the cam crest 22. Then, the movable contact 25 and the fixed contact come into contact with each other and the contact is turned on.

(Adjustment of cam shape and contact position of cam member for contact operation)
By adjusting the phase of the cam crest 22 and the contact position of the cam member 21 for contact operation, another contact at each notch position can be individually controlled.
This will be described with reference to FIG. FIG. 4 shows a case of 2 notches and 3 contacts, and shows an example in which the operation angle is 90 degrees. 4 (2) and 4 (3), K1 to K3 indicate cam peaks. The contact operation cam 21 is set to have a cam shape having cam peaks K1 to K3. When the handle 5 is at the notch position 1, the contact 2 is ON, the contact 1 is ON, and the contact 3 is OFF, as shown in FIG. When the handle 5 is at the notch position 2, as shown in FIG. 4 (2), the contact 2 is OFF, the contact 1 is OFF, and the contact 3 is ON. In this way, by adjusting the cam crest phase and the contact position of the contact operating cam member 21, it is possible to individually control another contact at each notch position.

  If the contact interval and the notch position interval are the same, another contact may not be individually controlled at each notch position. For example, when the handle 5 is at the notch position 1, the contact 2 is ON, the contact 1 is ON, the contact 3 is OFF, and the handle 5 is at the notch position 2, as shown in FIG. As shown in FIG. 4 (3), the contact 2 is OFF, the contact 1 is ON, and the contact 3 is ON. Therefore, when the handle 5 is at the notch position 1, the contact 2 is ON, the contact 1 is ON, the contact 3 is OFF, and when the handle 5 is at the notch position 2, the contact 2 is OFF, the contact 1 is OFF, the contact 3 cannot be turned on. Therefore, it is necessary to make the contact interval and the notch position interval different. For example, even in the case of 3 notches and 3 contacts, the arrangement of the contacts is 120 ° intervals for each notch (45 ° interval), and the cam shape for contact operation on the contact corresponding to each notch position is exceeded. By adjusting so as not to wrap, it becomes possible to individually control another contact at each notch position.

  For reference, the cam switch has a configuration in which the number of notches is three or more and another contact is individually controlled at each notch position. As shown in FIG. 5 (1), the cam switch includes a circumferential cam 201 and a contact 202 disposed around the circumferential cam 201. In order to increase the number of contacts, as shown in FIG. 5 (2), the configuration block 203 composed of the circumferential cam 201 and the contacts 202 is laminated in multiple stages. Therefore, the cam switch has a drawback that the structure is enlarged due to an increase in the number of contacts. In the present embodiment, since only one contact operation cam needs to be used, the problem of increasing the size is solved.

  Further, in the conventional selector switch using push rods, if a large number of push rods are arranged on the circumference, it is possible to individually control another contact at each notch position with three or more notches. . However, it is difficult to arrange a large number of push rods on the circumference. In addition, the number of parts increases. On the other hand, in this embodiment, since only one contact operation cam needs to be used, the above problem does not occur.

(Other matters related to the operation unit)
(1) In the above-described embodiment, the third cam 9A surface and the fourth cam surface 9B are provided on the entire circumference with cam crests spaced at equal intervals in the circumferential direction. "At least one cam surface of 4 cam surfaces 9B" and "at least one cam surface of second cam surface 8A and third cam surface 9A" are provided on the entire circumference with cam ridges spaced equally in the circumferential direction. Any configuration may be used.
Further, if a cam crest is provided on the entire circumference of all the cam surfaces of the first cam surface 7A, the second cam surface 8A, the third cam surface 9A, and the fourth cam surface 9B, “the first cam surface 7A and the first cam surface 7A The “contact area of the 4 cam surface 9B” and the “contact area of the second cam surface 8A and the third cam surface 9A” are increased, and the operating force can be increased. That is, it is possible to increase or decrease the operating force by adjusting the contact area between the opposing cam surfaces.

  (2) In the above embodiment, both the condition that θ2> θ3 and θ4> θ1 and the condition that θ1 and θ3 are substantially equal and θ2 and θ4 are substantially equal are satisfied. The structure which satisfy | fills only conditions may be sufficient.

  (3) In the above embodiment, the first cam member 7 is disposed on the lower side, the second cam member 8 is disposed on the upper side, and the third cam member 9 is disposed between the first cam member 7 and the second cam member 8. Although the spring 10 is arranged on the upper side of the second cam member 8 and the second cam member 8 is biased toward the third cam member 9 side, the second cam member 8 is placed on the lower side. The first cam member 7, the third cam member 9 is disposed between the second cam member 8 and the first cam member 7, and the spring 10 is disposed below the second cam member 8, and the second cam member The structure which urges 8 toward the 3rd cam member 9 side may be sufficient.

(Separation of operation part and contact part)
Further, in the present embodiment, when the contact is in the position where it is in the ON state, the operation shaft 6 is prevented from being pulled out from the contact operating cam member 21, and when the contact is in the position where it is in the OFF state. In addition, a retaining mechanism for allowing the operation shaft 6 to be pulled out from the contact operating cam member 21 is provided. In the type of selector switch in which the operation unit 2 and the contact unit 3 are separable, the operation unit 2 and the contact unit 3 must be separated when the selector switch is mounted on a mounting plate or the like. Further, after the selector switch is mounted on the mounting plate or the like, the operation unit 2 may accidentally come off from the contact unit 3. In any of the above cases, in the present embodiment, since the retaining mechanism is provided, the operation unit 2 can be separated from the contact unit 3 only when the contact is in the OFF state, and safety is ensured. Has been.

  On the other hand, in the conventional example, since the cam for turning the contact ON / OFF is provided on the operation part side, the contact is in the ON state when the operation part is separated from the contact part. Moreover, since the operation part is separated from the contact part, the contact cannot be turned off even if the operation handle or the like is operated. Therefore, industrial machinery and the like are operated by the contact ON, which is dangerous. In the present embodiment, the operation unit 2 can be separated from the contact unit 3 only when the contact is OFF. Further, since the contact operating cam member 21 is accommodated in the contact portion 3, even if the operating portion 2 is separated from the contact portion 3, the operating force by the contact operating cam member 21 remains applied to the contact. Therefore, if the operation part 2 is separated from the contact part 3 in the contact OFF state, the contact OFF state can be maintained even after the separation. As a result, as in the conventional example, it is possible to eliminate a dangerous state that occurs when the operation unit is separated from the contact unit, and to realize a switch device that ensures safety.

(Other matters related to the contact section)
In the present embodiment, as described above, the switch device is configured so that the operation part can be separated from the contact part only when the contact is in the OFF state, and the contact OFF state is maintained even after the separation, thereby ensuring the safety. In addition to the effect that can be realized, there is also an effect that it is possible to realize a switch device that can individually control other contact operations at each notch position in a small space.

The reason will be described below. As a conventional selector switch other than the conventional example described in the “Background Art” section (configuration including a cam for ON / OFF operation of the contact), as shown in FIG. 24, it is directly connected to the handle 100 and the handle 100. The cam 101, the contact operating plate 102 that engages the inner cam portion 101a (see FIG. 25) of the cam 101, the notch plate 103 that engages the outer cam portion 101b (see FIG. 25) of the cam 101, and the contact 105 ON. A push bar 104 or the like for performing OFF is provided (referred to as a separate selector switch). In addition, there is a structure in which the contact operation plate 102 and the notch plate 103 are configured by one plate (hereinafter referred to as a dual-purpose plate) (referred to as a dual-purpose selector switch).
In either case of the selector switch having the separate configuration and the selector switch having the dual configuration, the handle 100 is rotated when the contacts are switched, so that the rotational force of the handle 100 is contacted by the cam 101. It is converted into a force for moving the operation plate 102 (the dual-purpose plate in the dual-use configuration) in the axial direction, and the push rod 104 is pushed down by the movement to switch the contact ON / OFF.

  In the above conventional example, since the contact is switched between ON and OFF by the push rod 104, two push rods 104 are required in the case of two notches and two contacts. When two push rods 104 are used to achieve a 3 notch 3 contact (contact 1, contact 2, contact 3), contact 1 and contact 2 are turned on by setting the two push rods 104 in the ascending position and the descending position. Although it is possible to switch OFF, the contact 3 needs to turn on the push rod 104 at an intermediate position between the raised position and the lowered position, and the cam shape and the contact structure are complicated.

Therefore, it is difficult to realize a three-notch three-contact with two push rods 104. Further, when the number of notches increases, it is necessary to increase the push rods 104 accordingly, which is difficult in terms of space. As another problem, in the case of a multi-stage (three or more notches) selector switch, it is difficult to set different contacts for each notch.
In the present embodiment, the contact operation cam member 21 is configured to switch the contact of the contact portion 3 directly, so that a larger space is required than when the push rod 104 is used as in the conventional example. Therefore, a multi-stage selector switch can be configured. Further, by adjusting the cam shape of the contact operating cam member 21, it is possible to individually control other contact operations at each notch position.

  Embodiments according to the present invention will be described below with reference to FIGS. As an example, a three-notch selector switch with a key is illustrated. 6 to 12, 15, 16, 19, and 20 are views at the center position (OFF state), and FIGS. 13, 14, 17, and 18 are views at the right ON state position. is there. FIG. 23 shows an operation state when operating from the center position to the right ON state position.

(Configuration of operation unit 2)
This will be described mainly with reference to FIGS. The operation unit 2 includes a case 4, an operation shaft 6, a first cam member 7, a second cam member 8, a third cam member 9, a spring 10, and the like. In this embodiment, a key 30 that functions as an operation handle is provided on the upper portion of the case 4. The key 30 is attached to the base body 31 so that it can be inserted and removed. The base 31 is rotatably attached to a cylindrical member 32, and the cylindrical member 32 is fitted and fixed to the case 4. Therefore, the base 31 rotates integrally with the key 30. The operation shaft 6 is cylindrical, and a square hole 6b is formed in the upper end surface 6a. The rectangular lower end 31 a of the base 31 is fitted into the square hole 6 b, and the screw 32 is screwed onto the lower surface of the lower end 31 a so that the base 31 is connected to the operation shaft 6.

In addition, a pair of fitting protrusions 33 are formed on the outer periphery of the lower end portion of the operation shaft 6 with an interval of 180 degrees in the circumferential direction.
In the present embodiment, a restricting projection 8a is formed on the outer peripheral surface of the second cam member 8 as a restricting means for restricting the rotation of the second cam member 8 about the operating shaft 6 and the restricting protrusion 8a is provided with the restricting protrusion 8a. A fitting groove (not shown) for fitting is formed on the inner wall of the case 4.

(Configuration of contact part 3)
The contact portion 3 includes a case 20, a contact operation cam member 21, a contact block 23, and the like. The contact operating cam member 21 has a disc-shaped cam portion 21a and a shaft portion 21b. A mounting hole 40 into which the operation shaft 6 is inserted is formed in the cam portion 21a. Fitting recesses 41 and 41 are formed in the mounting hole 40, and when the fitting protrusions 33 and 33 of the operation shaft 6 are fitted into the fitting recesses 41 and 41, the operation shaft 6 is brought into contact operation cam member 21. It is to be connected with. The shaft portion 21b of the contact operating cam member 21 is rotatably inserted into the mounting hole 42 of the contact block 23.

  The case 20 includes a cylindrical portion 20a and a rectangular tube portion 20b. An insertion hole 43 (see FIGS. 15 and 16) into which the operation shaft 6 can be inserted is formed in the bottom portion 20c of the cylindrical portion 20a (corresponding to a closing plate, see FIGS. 15 and 16). Are formed with guide grooves 44, 44 (see FIGS. 15 and 16). And the formation position of the guide grooves 44 and 44 respond | corresponds to the position of the fitting protrusions 33 and 33 at the time of a contact OFF state, as shown in FIG.15 and FIG.16. Therefore, in the contact OFF state, the fitting recesses 41 and 41 are aligned with the guide grooves 44 and 44, and the fitting protrusions 33 and 33 can be pulled out via the guide grooves 44 and 44. . On the other hand, in the case other than the contact OFF state, as shown in FIGS. 17 and 18, the fitting recesses 41, 41 and the guide grooves 44, 44 do not coincide with each other. Stopped.

  The contact block 23 has four contact mechanisms. The contact mechanism includes a terminal 24 having a fixed contact, a contact plate 26 having a movable contact 25 that can be contacted / separated with the fixed contact, and a spring 27 that urges the movable contact 25 in a direction to contact the fixed contact (FIG. 21). (2), see FIG. 22), and a movable body 50 and the like are provided. The movable body 50 is movable in the vertical direction and corresponds to the projection 28 of the embodiment. The movable body 50 contacts the cam crest 22 of the contact operating cam member 21 to open the movable contact 25 with the fixed contact. It has a function of pressing in the direction of separating.

  As shown in FIG. 22, the movable body 50 has an insertion hole 50a. An attachment protrusion 60 is formed on the upper inner wall of the insertion hole 50 a, and the attachment protrusion 60 is inserted into the attachment hole 61 formed in the contact plate 26. A spring 27 is interposed between the contact plate 26 and the bottom surface 23 a of the contact block 23. The contact plate 26 is biased upward by the spring 27, and the movable body 50 is biased upward via the contact plate 26. Therefore, as shown in FIG. 21 (1), when the movable body 50 is pushed down by the cam crest 22 of the contact operation cam member 21, the movable contact 25 is separated from the fixed contact and is in the contact OFF state. As shown in FIG. 21 (2), when the movable body 50 is not pushed down by the cam crest of the contact operating cam member 21, the movable contact 25 is in contact with the fixed contact and is in the contact ON state.

  Next, the operation of the switch configured as described above will be described. When the key 30 is rotated to the left in the center OFF state position, the second cam member 8 and the third cam member 9 are moved up to the state shown in FIGS. 23 (1) to 23 (2). Thereafter, in the state shown in FIG. 23 (3), the cam crest 11 of the first cam member 7 reaches the top of the cam crest 14 of the third cam member 9, and when it gets over this top, the second cam is urged by the biasing force of the spring. The member 8 and the third cam member 9 are lowered and guided to the left ON state position shown in FIG. Therefore, a notch feeling is obtained when the cam crest 11 of the first cam member 7 gets over the top of the cam crest 14 of the third cam member 9. 23 (4), the movable body 50 is not pushed down by the cam crest 22 of the contact operating cam member 21, and the movable contact 25 is in contact with the fixed contact. That is, the contact is turned on.

  On the other hand, when the rotation operation is performed in the right direction from the left ON state position, the second cam member 8 is lifted and the state is changed from FIG. 23 (4) to FIG. 23 (5). After that, in the state of FIG. 23 (6), the top of the cam crest 13 of the third cam member 8 reaches the top of the cam crest 12 of the second cam member 8, and when it gets over this top, the spring biasing force The two cam members 8 are lowered and guided to the center OFF state position shown in FIG. Therefore, a notch feeling is obtained when the top of the cam crest 13 of the third cam member 8 gets over the top of the cam crest 12 of the second cam member 8. Moreover, in the center OFF state position shown in FIG. 23 (7), the movable body 50 is pushed down by the cam crest 22 of the contact operating cam member 21, and the movable contact 25 is separated from the fixed contact. That is, the contact is turned off.

  In this way, a switch that can substantially equalize the operation angle for obtaining a notch feeling when performing a horizontal rotation operation from the notch position, and can widen the operation angle for obtaining a click feeling to the vicinity of the maximum operation angle. Can be realized.

  Further, since the contact switching is performed by the contact operation cam member, the contact operation at each notch position can be individually controlled by adjusting the cam crest phase and the contact position of the contact operation cam member. . In addition, since the contact operation cam member is on the contact portion side, it is possible to configure the operation portion so that it can be removed from the contact portion only in the contact OFF state.

  The present invention can be applied to a switch device such as a selector switch and a selector switch with a lock described in the embodiments and examples.

  The present invention is preferably implemented in a switch device such as a selector switch.

The longitudinal cross-sectional view of the selector switch which concerns on embodiment. The figure for demonstrating the cam operation | movement of a 1st cam member-a 3rd cam member. The figure for demonstrating the cam operation | movement of the cam member for contact operations. The figure for demonstrating the relationship between the cam shape of a cam member for contact operations, and a contact position. The figure which shows the structure of a cam switch. The top view of the selector switch which concerns on an Example. The perspective view of the selector switch which concerns on an Example. The front view of the selector switch which concerns on an Example. The side view of the selector switch which concerns on an Example. FIG. 7 is a cross-sectional view taken along line Y1-Y1 in FIG. 6. The perspective view in the state where the selector switch concerning an example separated. The disassembled perspective view of the selector switch which concerns on an Example. The top view of the selector switch which concerns on an Example. FIG. 14 is a cross-sectional view taken along line Y2-Y2 of FIG. The top view of the contact part which concerns on an Example. FIG. 16 is a cross-sectional view taken along line Y3-Y3 in FIG. The top view of the contact part which concerns on an Example. FIG. 18 is a cross-sectional view taken along line Y4-Y4 in FIG. The top view of the state which removed the case of the selector switch which concerns on an Example. The perspective view of the state which removed the case of the selector switch concerning an Example. It is a figure which shows the OFF / ON state of a contact, FIG.21 (1) shows the OFF state of a contact, FIG.21 (2) shows the contact ON state. The disassembled perspective view of the contact mechanism of the selector switch which concerns on an Example. The figure for demonstrating the cam operation | movement of the selector switch which concerns on an Example. Sectional drawing of the selector switch of the separate structure of a prior art example. The figure which shows the structure of the cam of a prior art example.

Explanation of symbols

1: Selector switch 2: Operation unit
3: Contact part 5: Operation handle
6: Operation shaft 7: First cam member
8: Second cam member 9: Third cam member 10: Spring 11, 12, 13, 14, 22: Cam crest 7A: First cam surface 8A: Second cam surface 9A: Third cam surface 9B: Fourth cam Surfaces θ1 to θ4: Inclination angle 21: Contact operating cam member 30: Key 33: Fitting protrusion 41: Fitting recess 44: Guide groove

Claims (2)

A switch device that includes an operation unit provided with an operation piece, and a contact unit that is detachably connected to the operation unit, and that switches a contact of the contact unit by rotating the operation piece.
An operation shaft that rotates in conjunction with the operation of the operation piece;
A contact operation cam member that is housed and disposed in the contact portion and rotates in conjunction with the operation shaft to switch the contact;
When the contact is in an OFF state, the operation shaft is allowed to be removed from the contact operation cam member, and when the contact is in an ON state, the operation shaft is prevented from being removed from the contact operation cam member. A retaining mechanism to
A switch device comprising: The retaining mechanism is
Closes the fitting protrusion formed on the outer peripheral surface of the operation shaft, the fitting recess formed on the contact operation cam member and into which the fitting protrusion is fitted, and the fitting recess into which the fitting protrusion is fitted. And a closing plate that
The closing plate is formed with a guide groove for guiding the fitting protrusion when the fitting protrusion is inserted / retracted into / from the fitting recess, and the guide groove is formed at a position where the contact is OFF. 2. The switch device according to claim 1, wherein the fitting recess and the guide groove communicate with each other only in the case.

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