JP3959900B2 - Switch and electronic device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch used for detecting the presence or absence of a recording medium and the operation of a mechanism in various electronic devices, and an electronic device using the switch.
[0002]
[Prior art]
A conventional switch will be described with reference to FIGS.
[0003]
FIG. 14 is a side sectional view of a conventional switch, FIG. 15 is a plan view of the bottom surface of the case, and FIG. 16 is an exploded perspective view. In FIG. A case 4 in which a fixed terminal 2 having a fixed contact 3A and a fixed terminal 3 having a fixed contact 3A are implanted in a planar shape, 4 is made of an electrically conductive member made of a thin metal plate having elasticity, and a movable portion 4F bent into a substantially U-shape; A contact piece 5 having a locking part 4A with one end bent to the outside and tongue pieces 4D and 4E each having movable contacts 4B and 4C at the tip on the other side, 5 is made of a molded member. The operation lever having a fulcrum portion 5A that is pivotably locked to the case 1, the movable portion 4F of the contact piece 4 abuts on the lower surface thereof, and a V-shaped lower portion of the fulcrum portion 5A. The locking portion 4A of the contact piece 4 is locked to the locking portion 5B.
[0004]
The contact piece 4 is mounted in a slightly bent state between the operation lever 5 and the inner bottom surface of the case 1, and the movable contact 4B is in pressure contact with the fixed contact 2A.
[0005]
Next, the operation of this switch will be described with reference to the drawings.
[0006]
FIG. 14 shows a normal state, in which the movable contact 4B is always in pressure contact with the fixed contact 2A.
[0007]
When the push-down operation of the operation lever 5 is started, the movable portion 4F of the contact piece 4 rotates around the fulcrum portion 5A of the operation lever 5, and the movable contact 4B always slides while being in pressure contact with the fixed contact 2A.
[0008]
Further, when the movable contact 4C slides on the inner bottom surface and moves by a predetermined distance, the movable contact 4C comes into sliding contact with the fixed contact 3A to be turned on in FIG. 17, and when the operation lever 5 is further pushed down, the movable contact 4C is pressed against the fixed contact 3A. Then, it slides in the X direction, and the state shown in FIG. 18 is obtained.
[0009]
Here, a repulsive force F corresponding to the deflection A of the spring is generated between the locking portion 4A and the movable contacts 4B, 4C, and when the distance E> 0 between them (in FIG. 18) An E × F rotational moment is generated in the clockwise direction (the left side is positive with respect to the locking portion 4A).
[0010]
Accordingly, when the pressing force of the operation lever 5 is removed, the normal state of FIG. 14 is restored by the restoring force of the contact piece 4, and a series of operations is completed.
[0011]
[Problems to be solved by the invention]
However, the conventional switch has a structure in which the switch is turned on and off by driving the contact piece 4 made of a thin metal plate having a substantially U-shaped elasticity disposed on the lower surface of the operation lever 5. In order to store the 4 in the case 1 and operate it, the height dimension of the case 1 becomes larger due to stacking, so that there is a problem that it is difficult to use it for an electronic device that requires a small and thin switch.
[0012]
The present invention solves such a conventional problem, and an object of the present invention is to provide a switch that is small and thin and has high contact stability and an electronic device using the switch.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the switch of the present invention includes an opening having a rotation support portion at one end, a pair of fixed contacts on the inner bottom surface on the other end side, and a fulcrum portion at a substantially central portion of the inner bottom surface. A box-shaped case with an open top surface and a shaft that can be rotated by a rotation support portion of the case, and an operating portion that projects outward from the opening of the case on one side of the shaft An operating body having a drive unit that moves upward in the case on the side, a first end portion that becomes a movable contact that is detachably disposed on a pair of fixed contacts of the case, and an upper surface of the drive unit of the operating body Both end portions of the second end portion placed on the connecting portion are connected by a connecting portion, and an intermediate portion of the connecting portion abuts against a fulcrum portion of the inner bottom surface of the case and is connected to an inner end of the first end portion. It is connected and bent upward, and its tip extends to the operating body side from the above fulcrum position. A movable contact body having a tongue piece portion, and pressing the tip of the tongue portion portion of the movable contact body to press the connecting portion against the fulcrum portion of the bottom surface of the case, and the second end portion of the movable contact body is operated as described above. The cover is configured to cover and fix the upper surface of the case so as to press the body drive unit.
[0014]
Accordingly, the movable contact body made of an elastic thin plate arranged inside the case and the operation body provided to be rotatable at one end of the case are respectively arranged in the lateral direction, and the second end portion of the movable contact body is moved by the operation body. To provide a switch that can be driven to operate the switch and can be reduced in size in the height direction, so that the entire switch can be reduced in size and thickness, and has high contact stability, and an electronic device using the switch It is something that can be done.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention includes an opening having a rotation support portion at one end, a pair of fixed contacts having a lead-out terminal on the inner bottom surface on the other end side, and a substantially central portion on the inner bottom surface. A box-shaped case made of an insulating material having a convex fulcrum and an open top surface, and a shaft portion rotatably supported by the rotation support portion of the case, the case on one side of the shaft portion An operating part that protrudes outward from the opening of the other side, and an operating body having a drive part that moves upward inside the case by pressing the operating part to the other side, and a pair of fixed contacts of the case Both end portions of the first end portion serving as a movable contact disposed in a separable manner and the second end portion placed on the upper surface of the driving portion of the operating body are connected by a connecting portion, and an intermediate portion of the connecting portion Abuts against the fulcrum on the bottom surface of the case and is connected to the inner end of the first end. A movable contact body made of an elastic thin plate having a tongue piece portion that is bent and raised toward the operating body side with respect to the fulcrum portion position, and the connection portion by pressing the tongue piece portion distal end of the movable contact body The switch is made of a cover that covers the upper surface of the case so that the second end is fixed to the case so that the second end presses the drive part of the operating body. The movable contact body made of an elastic thin plate arranged inside the case and the operation body provided to be rotatable at one end of the case are respectively arranged in the lateral direction, and the second end portion of the movable contact body is driven by the operation body. The switch can be operated and the height dimension can be reduced, so that the entire switch can be reduced in size and thickness, and by pressing the operating part of the operating body, the movable contact body first becomes the fulcrum of the case. Turn around the fulcrum However, when the operating body is further pressed, the movable contact comes into contact (on state) with the fixed contact of the case, and then the movable contact body rotates around the contact portion between the movable contact and the fixed contact. Since the connecting portion of the movable contact body is separated from the fulcrum portion of the case, the positional relationship of the force applied to the movable contact body (on state) before and after the movable contact and the fixed contact contact (off state) ( (Balance) changes, so that a constant contact pressure can be secured immediately after contact (ON state), and the contact pressure gradually increases from the point of contact ON, as in the case of commonly used switching contacts On the other hand, it has the effect | action that the switch excellent in contact stability is realizable.
[0016]
According to a second aspect of the present invention, in the first aspect of the present invention, the movable contact body is made of a substantially rectangular elastic thin metal plate, and is provided with a U-shaped slit in the substantially central portion, and the tongue piece portion in the central portion is provided. In addition to the operation described in claim 1, since the bending process is performed only on the tongue piece portion, it is easy to manufacture and can be manufactured at a low cost.
[0017]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the tip of the operating portion of the operating body has a substantially cylindrical shape with a diameter larger than the thickness of the base of the operating portion. When mounted on a wiring board of an electronic device or the like, even if an overload is applied to the operation part of the operating body due to the object to be detected, only the substantially cylindrical tip at the tip of the operation part hits the object to be detected and the wiring board. By making contact with each other and preventing the pressing force from being detected directly from being applied to the part other than the tip of the operation unit, it is possible to prevent damage to the switch without applying an overload to the switch body. Have.
[0018]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the pair of fixed contacts having lead-out terminals on the inner bottom surface of the case are insert-molded and fixed, and the back surface of the case A groove is provided around the terminal that is led out at a predetermined interval, so that the case can be easily formed and the flux is prevented from entering the switch when mounted on a wiring board or the like. It has the effect of being able to.
[0019]
According to a fifth aspect of the invention, in the invention according to any one of the first to fourth aspects, a substantially arc-shaped protruding portion is provided at the tip of the tongue piece portion of the movable contact body, and an upper surface on the root side of the protruding portion. Protrusions are provided on the lower surface of the cover so as to abut on the movable contact body, the position of the movable contact body can be easily regulated, a switch with high on-position accuracy and stable contact reliability can be realized. Has an effect.
[0020]
The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a step or a protrusion for restricting the horizontal movement of the movable contact body is provided on the upper surface of the driving portion of the operation body, The upper surface of the drive unit is shifted downward or upward from the rotation center position of the shaft part. By pressing the operation part of the operation body, the movable contact body rotates around the fulcrum part of the case and is movable. The contact point contacts the fixed contact point of the case, and the movable contact point moves in the horizontal direction due to the horizontal component of the rotational movement of the drive part of the operating body. It is possible to realize a switch.
[0021]
The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the cover is made of metal, a lead-out terminal is provided, and a plurality of parts provided in the case via the movable contact body A switch circuit is formed between the contact point and the fixed contact point, and a contact configuration in which a plurality of open / close contacts are connected in parallel can be achieved. Thus, a switch having excellent contact reliability can be realized.
[0022]
The invention described in claim 8 is an electronic device set to detect the presence or absence of a recording medium and the operation of a mechanism by the switch according to any one of claims 1 to 7, and the switch Taking advantage of its thinness, it has an effect that a small and thin electronic device can be configured.
[0023]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
(Embodiment 1)
FIG. 1 is a side sectional view of a switch according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a side sectional view showing the same operation state.
[0025]
In the figure, 11 is a box-shaped case made of an insulating material and having an open top surface, and has an opening portion 11B having a rotation support portion 11A at one end, and is fixed to the inner bottom surface 11C on the other end side opposite to the opening portion 11B. A metal first terminal 12 having a contact 12A and a metal second terminal 13 having a second fixed contact 13A are implanted as a pair, and a convex fulcrum 11D at the center of the inner bottom surface 11C, and An engaging protrusion 11E is provided on the outer peripheral side surface.
[0026]
Reference numeral 16 denotes an operating body, which includes a shaft portion 16A that is rotatably supported by the rotation support portion 11A of the case 11. The shaft portion 16A projects outward from the opening portion 11B of the case 11 on one side. The operation unit 16B extends by a predetermined dimension upward from the height of the case 11, and the other is a drive that moves upward in the case 11 when the operation unit 16B is pushed down and rotated about the shaft portion 16A. A portion 16C is provided.
[0027]
Reference numeral 14 denotes a movable contact body formed by providing a U-shaped slit at a substantially central portion of a substantially rectangular elastic metal thin plate and bending the tongue piece portion 14D of the central portion obliquely upward. A first end portion 14A serving as a movable contact disposed so as to be able to come into contact with and away from the contacts 12A and 13A, and a second end portion 14B placed on the upper surface of the drive portion 16C of the operating body 16 on the opposite side, An intermediate portion of a connecting portion 14C that connects both end portions of the one end portion 14A and the second end portion 14B in parallel is in contact with a fulcrum portion 11D of the case 11.
[0028]
The tongue portion 14D at the center is connected to the inner end of the first end portion 14A and bent upward at a predetermined angle, and the tip of the tongue piece portion 14D is operated more than the position of the fulcrum portion 11D of the case 11. It extends to the body 16 side.
[0029]
A cover 15 is an upper bottom covering the upper surface of the case 11, and is engaged and fixed to an engaging protrusion 11E on the outer peripheral side surface of the case 11 by a snap portion 15C provided on the side. 14 is pressed against the fulcrum 11D of the case 11, and the drive portion 16C of the operating body 16 is pressed down at the second end 14B. ing.
[0030]
The switch according to the present embodiment is configured as described above, and in FIG. 1 showing the normal state, the movable contact body 14 has three points of the second end portion 14B, the connecting portion 14C, and the tip end portion of the tongue piece portion 14D. The positional relationship of the force applied to each of (arrow parts A, B, C) is set so as to be stable in a state where the upper surface of the driving part 16C of the operating body 16 is pressed by the second end part 14B of the movable contact body 14. Since the first end portion 14A serving as a movable contact and the first fixed contact 12A and the second fixed contact 13A below the first end portion 14A have a predetermined interval, the switch is in an OFF state, and the first terminal 12 There is no conduction between the two terminals 13.
[0031]
The operation body 16 rotates around the shaft portion 16A by pressing the operation portion 16B. However, when the operation portion 16B is not pressed, the upper surface of the base portion of the operation portion 16B comes into contact with the lower surface of the cover 15. Therefore, when the operation unit 16B is pressed, the upper surface near the drive unit 16C from the shaft portion 16A comes into contact with the lower surface of the cover 15 to prevent rotation.
[0032]
Next, the operation when the operation portion 16B of the operation body 16 of the switch configured as described above is pressed will be described. The operation portion 16B of the operation body 16 is pressed from the normal state in FIG. When the operating body 16 is rotated in the direction of the arrow F, first, the movable contact body 14 has the second end portion 14B lifted upward by the driving portion 16C of the operating body 16 and is in contact with the fulcrum portion 11D of the case 11. The first end 14A, which is a movable contact, rotates around the connecting portion 14C, contacts the fixed contacts 12A, 13A of the case 11, and the switch is turned on as shown in the side sectional view of FIG. The first terminal 12 and the second terminal 13 are electrically connected.
[0033]
When the operating body 16 is further rotated in the direction of arrow F, the movable contact body 14 is separated from the fulcrum portion 11D of the case 11 at the movable contact body 14 as shown in FIG. 14 is switched to the positional relationship of the force applied to each of the three points (arrows D, A, C) of the first end portion 14A, the second end portion 14B, and the tongue piece portion 14D, which are movable contacts. A stable contact pressure can be obtained immediately after the ON state.
[0034]
Next, when the pressing in the direction of the arrow F with respect to the operation portion 16B is removed, the movable contact body 14 returns to the original state by its elastic restoring force, and the first end portion 14A that becomes the movable contact is fixed contacts 12A and 13A. The second end portion 14B of the movable contact body 14 pushes down the driving portion 16C of the operating body 16 to return to the normal state (switch is turned off) shown in FIG.
[0035]
As described above, according to the present embodiment, the second end portion 14B of the movable contact body 14 made of an elastic metal thin plate disposed inside the case 11 is driven by the operating body 16 that is rotatably provided at one end of the case 11. As described above, by disposing the movable contact body 14 and the operation body 16 in the lateral direction, the height dimension can be reduced, so that the entire switch can be reduced in size and thickness.
[0036]
Further, when the operating portion 16B of the operating body 16 is pressed, the movable contact body 14 first rotates about the fulcrum portion 11D of the case 11 as a fulcrum. However, when the operating body 16 is further pressed, the movable contact body 14 becomes the first movable contact. The end portion 14A comes into contact with the fixed contacts 12A and 13A of the case 11 (on state), and then the movable contact body 14 rotates around the contact portion between the first end portion 14A and the fixed contacts 12A and 13A as a fulcrum. As a result, the connecting portion 14C of the movable contact body 14 is separated from the fulcrum portion 11D of the case 11, so that the first end portion 14A and the fixed contacts 12A and 13A are in contact (off state) and after they are in contact (on state). Since the positional relationship (balance) of the force applied to the movable contact body 14 changes, a constant contact pressure can be secured immediately after contact (ON state), as in the case of a switch opening / closing contact generally used, Contact on Gradually to what contact pressure is increased from the point, in which it is possible to realize a good switch contact stability.
[0037]
In the above embodiment, as shown in the side sectional view showing the operation state of the other embodiment of FIG. 4, the tip of the operation portion 18B of the operation body 18 has a diameter larger than the thickness of the base portion of the operation portion 18B. By providing the tip 18E having a substantially cylindrical shape, when the switch is mounted on a wiring board (not shown) such as an electronic device, the operation part 18B of the operating body 18 is overloaded by an object to be detected (not shown). Even when a load is applied, only the substantially cylindrical tip 18E at the tip of the operation unit 18B is brought into contact with the detected object and the wiring board, and the pressing force by the detected object is directly applied to the part other than the tip 18E of the operation unit 18B. Since it can be prevented from being applied, the switch body is not overloaded, and damage to the switch can be suppressed.
[0038]
Moreover, in the said embodiment, like the bottom view of the case which shows other embodiment of FIG. 5, a pair of stationary contacts 20A and 21A which have the terminals 20 and 21 for derivation | leading-out on the inner bottom face of the case 19 are shown. The case 19 can be easily formed by inserting and fixing, and providing the groove portion 22 around the terminals 20 and 21 led out to the back surface of the case 19 at a predetermined interval. The flux can be prevented from entering the switch.
[0039]
(Embodiment 2)
FIG. 6 is a side sectional view of a switch according to a second embodiment of the present invention, and FIG. 7 is an external perspective view of the main part. The tongue piece of the movable contact 31 is different from that according to the first embodiment. A substantially arc-shaped projecting portion 31F is provided at the tip of the portion 31D, and a projecting portion 32C is provided on the lower surface of the cover 32 so as to be in contact with the upper surface on the base side of the projecting portion 31F. Is the same as
[0040]
The switch configured as described above can easily control the position of the movable contact 31 as shown in FIG. 6, and can realize a switch with high on-position accuracy and stable contact reliability. is there.
[0041]
(Embodiment 3)
FIG. 8 is a side sectional view according to a third embodiment of the present invention, FIG. 9 is an external perspective view of an operating body and a case, and FIG. 10 is a side sectional view showing the same operation state. In contrast to the above, a step portion 36D for restricting the horizontal movement of the movable contact body 37 is provided on the upper surface of the drive portion 36C of the operating body 36, and the position of the upper surface of the drive portion 36C for driving the movable contact body 37 is set as a shaft portion. The shaft portion 36A is arranged to be shifted downward from the rotation center position of 36A at a predetermined interval. The shaft portion 36A is rotatably supported by the rotation support portion 38A of the case 38, and the other portions are the first embodiment. Or it is the same as that of 2.
[0042]
The switch configured in this manner is shown in FIG. 10 because the horizontal movement of the second end portion 37B of the movable contact body 37 is restricted by the step portion 36D of the operating body 36 as shown in FIG. Thus, when the operating body 36 is rotated in the direction of arrow F and the switch is operated, the horizontal component of the rotational movement of the drive unit 36C moves the movable contact body 37 in the horizontal direction. A sliding motion is brought about between the contacts at the time of contact, and stable contact stability is obtained.
[0043]
(Embodiment 4)
FIG. 11 is an external perspective view of a cover according to the fourth embodiment of the present invention. Compared with the first to third embodiments, the cover 41 is made of metal and a lead terminal 41B is provided. The other parts are the same as those in the first to third embodiments.
[0044]
The switch configured in this way can form a switch circuit between the plurality of fixed contacts 12A and 13A provided in the case 11 via the terminal 41B for leading out of the cover 41 and the movable contact body 14. Since a contact configuration in which a plurality of switching contacts are connected in parallel is achieved, a switch with excellent contact reliability can be realized.
[0045]
In addition, the movable contact bodies 14, 31, and 37 described in the first to fourth embodiments are not limited to this configuration. For example, the tongue piece extends from the substantially central portion of the first end portion 43A as shown in FIG. By making the movable contact body 43 provided with a slit 43G having a predetermined width in the middle part of the portion 43D, the first end portions 43A1 and 43A2 serving as movable contacts come into contact with and separate from the fixed contacts 12A and 13A. The property can be further improved.
[0046]
(Embodiment 5)
FIG. 13 is a cross-sectional view of an electronic device according to a fifth embodiment of the present invention. As shown in FIG. 13, the switch described in the first to fourth embodiments is mounted on the electronic device 46, and an object 47 is detected. The operation unit 16B of the operation body 16 detects the presence or absence of the electronic device. By mounting a thin switch, the electronic device main body can be made small and thin.
[0047]
【The invention's effect】
As described above, according to the present invention, the movable contact body made of an elastic thin plate disposed inside the case and the operation body provided rotatably at one end of the case are disposed laterally, and the second end of the movable contact body is arranged. The switch can be operated by driving one end of the operating body, and the height dimension can be reduced, so that the entire switch can be reduced in size and thickness, and a switch with high contact stability and The used electronic device can be provided.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a switch according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the switch. FIG. 3 is a side sectional view showing the operation state. FIG. 5 is a bottom view of a case showing another embodiment. FIG. 6 is a side sectional view of a switch according to a second embodiment of the present invention. FIG. 8 is a side sectional view according to a third embodiment of the present invention. FIG. 9 is an external perspective view of the operating body and case. FIG. 10 is a side sectional view showing the same operation state. Fig. 12 is an external perspective view of a cover according to a fourth embodiment. Fig. 12 is an external perspective view of a movable contact body showing another embodiment. Fig. 13 is a cross-sectional view of an electronic device according to a fifth embodiment of the invention. 14 is a side sectional view of a conventional switch. FIG. 15 is a plan view of the bottom of the case. FIG. 16 is an exploded perspective view of the case. A side cross-sectional view showing a full-stroke state of pressing the middle of a side cross-sectional view and FIG. 18 the operating lever of the operating lever EXPLANATION OF REFERENCE NUMERALS
11, 19 Case 11A Rotation support portion 11B Opening portion 11C Inner bottom surface 11D Support point portion 11E Protrusion portion 12 First terminal 12A First fixed contact 13 Second terminal 13A Second fixed contacts 14, 31, 37, 43 Movable contact body 14A, 43A, 43A1, 43A2 First end portion 14B, 37B Second end portion 14C Connection portion 14D, 31D, 43D Tongue piece portion 15, 32, 41 Cover 15C Snap portion 16, 18, 36 Operating body 16A, 36A Shaft portion 16B, 18B Operation part 16C, 36C Drive part 18E Tip part 20, 21 Terminal 20A, 21A Fixed contact 22 Groove part 31F Projection part 32C Projection part 36D Step part 41B Terminal 43G Slit 46 Electronic device 47 Detected object

Claims (8)

Made of an insulating material provided with an opening having a rotation support part at one end, a pair of fixed contacts having a lead-out terminal on the inner bottom surface on the other end side, and a convex fulcrum part at a substantially central portion of the inner bottom surface A box-shaped case with an open top surface and a shaft portion rotatably supported by the rotation support portion of the case, and an operation portion protruding outward from the opening of the case on one side of the shaft portion. An operation body having a drive unit that moves upward in the case by pressing the operation unit to the other side, and a movable contact disposed so as to be able to contact with and separate from the pair of fixed contacts of the case Both end portions of the end portion and the second end portion mounted on the upper surface of the driving portion of the operating body are connected by a connecting portion, and an intermediate portion of the connecting portion abuts on a fulcrum portion on the bottom surface of the case. Connected to the inner end of the first end portion, bent upward and the tip is supported by the support A movable contact body made of an elastic thin plate having a tongue piece extending from the position to the operating body side, and pressing the tip of the tongue piece portion of the movable contact body to make the connecting portion a fulcrum portion of the bottom surface of the case A switch comprising a cover which is brought into pressure contact and is fixed to the case and covers the upper surface of the case so that the second end presses the drive unit of the operating body. 2. The switch according to claim 1, wherein the movable contact body is made of a substantially rectangular thin elastic metal plate, provided with a U-shaped slit at a substantially central portion, and bent up with a tongue piece at the central portion. The switch according to claim 1 or 2, wherein the operating portion tip portion of the operating body has a substantially cylindrical shape with a diameter larger than the thickness of the operating portion base portion. The pair of fixed contacts having lead-out terminals on the inner bottom surface of the case are insert-molded and fixed, and a groove is provided around the terminal led out on the back side of the case at a predetermined interval. The switch according to one. 5. The projection according to claim 1, wherein a substantially arc-shaped projection is provided at the tip of the tongue piece of the movable contact body, and a projection is provided on the lower surface of the cover so as to contact the upper surface of the base of the projection. Switch. 6. The step according to claim 1, wherein a step or a projection for restricting the horizontal movement of the movable contact body is provided on the upper surface of the operating portion of the operating body, and the upper surface of the driving portion is shifted downward or upward from the rotation center position of the shaft portion. The switch according to any one of the above. The cover is made of metal, a lead-out terminal is provided, and a switch circuit is configured between the plurality of fixed contacts provided in the case via the movable contact body. switch. An electronic device set to detect the presence of a recording medium and the operation of a mechanism by the switch according to claim 1.

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