JP6933368B2 - Key switch device - Google Patents

Description

The present invention relates to a key switch device.

Patent Document 1 discloses a structure of a key switch device using a disc cylinder lock. This key switch device includes an inner cylinder and an outer cylinder in which the inner cylinder is housed, and a plurality of tumblers arranged in the axial direction are housed on the peripheral surface of the inner cylinder. Further, a terrace portion (stopper) is provided which is arranged side by side in a row with the tumbler in the axial direction and protrudes in the outer diameter direction. This terrace is a convex body for regulating the rotation range of the inner cylinder with respect to the outer cylinder at a predetermined angle.

Japanese Unexamined Patent Publication No. 2015-60678 Jikkai Sho 62-177863

In the techniques of Patent Documents 1 and 2, since a plurality of tumblers and terraces (stoppers) are arranged side by side in the axial direction of the inner cylinder, the axial length of the key switch cannot be shortened. There is a problem that it becomes difficult to attach the key switch device to a small or thin electronic device or the like.
Therefore, an object of the present invention is to shorten the axial length of a key switch device using a disc cylinder lock so that it can be easily attached to a thin or small electronic device or the like.

In the present invention, a cylindrical inner cylinder having a built-in disc cylinder, an outer cylinder in which the inner cylinder is rotatably housed in the circumferential direction thereof, and an outer cylinder having an opening at one end of the inner cylinder to form the inner cylinder. A keyhole into which a key can be inserted in the axial direction, a movable contact provided on the other end side of the inner cylinder and rotating in conjunction with the rotation of the inner cylinder, and contact with the movable contact according to the rotation angle of the movable contact. A fixed contact that changes state is provided, and a first state before inserting the key and a second state after inserting the key and rotating the inner cylinder with respect to the outer cylinder are selectively selected. The inner cylinder is a key switch device capable of providing a plurality of tumblers arranged side by side in the axial direction, and a stopper provided at a position different from the tumbler in the circumferential direction and protruding in the outer diameter direction. provided, on the inside of the outer cylinder, a stopper movement and rotation inhibiting groove engaging said tumbler in said first state provided along the axial direction, the stopper is formed along the circumferential direction to move A road and a stopper receiving portion that regulates the movement of the stopper in the circumferential direction are provided, and when the tumbler shifts from the first state to the second state, the tumbler is provided by the inner peripheral surface of the stopper receiving portion. It is characterized in that it is configured to regulate the movement of the tumbler.

According to the present invention, since the stopper is provided at a position different from that of the tumbler in the circumferential direction, the tumbler and the storage portion of the tumbler can be arranged on the keyhole side in the radial direction of the inner cylinder. Therefore, the length of the inner cylinder can be shortened as compared with the case where the tumbler and the stopper are arranged side by side in the longitudinal direction of the inner cylinder. Therefore, it is possible to provide a key switch device capable of shortening the length in the key insertion direction (axial direction).

In this case, a plate-shaped ring fastening member attached so as to project outward from the outer peripheral surface of the inner cylinder is provided on the other end side of the inner cylinder, and the ring fastening member and the outer cylinder are provided. May be engaged with a part of.

According to the present invention, the ring fastening member can prevent the inner cylinder from coming off from the outer cylinder. For example, in the technique of Patent Document 2 described above, the E-ring is urged in the outer diameter direction by a coil spring, but in the present invention, the coil spring is unnecessary, so that the length of the key switch device can be shortened. can.

In this case, the ring fastening member may be brought into contact with the end surface on the other end side of the outer cylinder.
According to the present invention, the axial length can be made shorter.

In the above case, it is preferable to provide a base member for accommodating the movable contact and the fixed contact and holding the ring fastening member so as not to come off from the inner cylinder. According to the present invention, it is possible to prevent the ring fastening member provided on the inner cylinder from being removed.

In the above case, a storage recess formed inside the base member, a disk that rotates in synchronization with the inner cylinder and is stored in the storage recess, and the movable contact is provided on the other end side. A rotor having a shape, an insertion hole penetrating in the diameter direction of the rotor, a coil spring housed in the insertion hole, and being exposed from the opening of the insertion hole and urged in the outer diameter direction by the coil spring. A sphere and a receiving recess formed on the inner peripheral surface of the storage recess and serving as a receiving portion of the sphere may be provided.

In the prior art, since a resin urging member is provided to cope with the problem, the length in the axial direction becomes long and the load design of the resin urging member is complicated. However, according to the present invention, the axial direction of the coil spring is aligned with the radial direction of the rotor, and the coil spring and the sphere are housed in the insertion holes, so that the members are laminated in the height direction. It can be suppressed and the axial length can be shortened. Further, according to the present invention, since the resin urging member is not used as in the conventional case, the load setting of each member can be flexibly performed. In addition, it is possible to provide a high-quality operation feeling by inserting the sphere into the receiving recess.

In the above case, a concave portion is formed on one side and a convex portion is formed on the other side of the other end side of the inner cylinder and one end side of the rotor, and the concave portion and the convex portion are fitted to each other. It is preferable that the inner cylinder and the rotor rotate in synchronization with each other.

According to the present invention, since the rotor can be attached to the inner cylinder by fitting the concave portion and the convex portion, the length in the axial direction can be further shortened. Further, since the coil spring and the sphere can be housed in the convex portion, the length in the axial direction can be further shortened.

In each of the above cases, the movable contact may be characterized in that it is made of a leaf spring-shaped metal.
According to the present invention, by using the leaf spring as an urging member, a coil spring having the axial direction of the key switch device as the longitudinal direction becomes unnecessary, and the length in the axial direction is increased by the difference in the height of the coil spring leaf spring. Can be shorter.

In each of the above cases, a fall-out prevention member for fastening the movable contact may be provided.
According to the present invention, it is possible to prevent the movable contact from falling off.

According to the present invention, in a key switch device using a disc cylinder lock, the length in the axial direction can be shortened so that it can be easily attached to a thin or small electronic device or the like.

It is a perspective view of the key switch device which concerns on one Embodiment of this invention. It is an exploded perspective view of the key switch device which concerns on one Embodiment of this invention. It is a top view of the key switch device which concerns on one Embodiment of this invention (the first state). FIG. 3A is a cross-sectional view taken along the line BB of FIG. 3A. It is a side view of the key switch device which concerns on one Embodiment of this invention. FIG. 3C is a cross-sectional view taken along the line CC of FIG. 3C. FIG. 3 is a cross-sectional view taken along the line HH in FIG. 3D. It is a DD cross-sectional view of FIG. 3D. 3D is a cross-sectional view taken along the line EE. FIG. 3 is a cross-sectional view taken along the line FF in FIG. 3D. FIG. 3 is a cross-sectional view taken along the line GG in FIG. 3D. It is a top view of the key switch device which concerns on one Embodiment of this invention (second state). FIG. 4A is a cross-sectional view taken along the line JJ of FIG. 4A. It is a side view of the key switch device which concerns on one Embodiment of this invention. FIG. 4C is a cross-sectional view taken along the line PP of FIG. 4C. FIG. 4D is a cross-sectional view taken along the line NN of FIG. 4D. FIG. 4D is a cross-sectional view taken along the line KK of FIG. 4D. 4 is a cross-sectional view taken along the line LL of FIG. 4D. FIG. 6 is a cross-sectional view taken along the line RR of FIG. 4D. It is a cross-sectional view of MM of FIG. 4D. It is a perspective view seen from the upper side of the inner cylinder of the key switch device which concerns on one Embodiment of this invention. It is a perspective view seen from the lower side of the inner cylinder of the key switch device which concerns on one Embodiment of this invention. It is a top view of the outer cylinder of the key switch device which concerns on one Embodiment of this invention. It is a perspective view of the outer cylinder of the key switch device which concerns on one Embodiment of this invention. It is a perspective view of the E ring of the key switch device which concerns on one Embodiment of this invention. It is a perspective view seen from the upper side of the rotor of the key switch device which concerns on one Embodiment of this invention. It is a perspective view seen from the lower side of the rotor of the key switch device which concerns on one Embodiment of this invention. It is a top view of the contact piece of the key switch device which concerns on one Embodiment of this invention. It is a perspective view of the contact piece of the key switch device which concerns on one Embodiment of this invention. It is a perspective view of the stopper of the key switch device which concerns on one Embodiment of this invention. It is a top view of the base member of the key switch device which concerns on one Embodiment of this invention. It is an enlarged cross-sectional view of the base member side of the key switch device which concerns on one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the key switch device 1 of the present embodiment, and FIG. 2 is an exploded perspective view of the key switch device 1. The key switch device 1 is a switching mechanism capable of switching the switch by inserting the key 15 into the keyhole 31 and operating the key.

The key switch device 1 includes an inner cylinder 3, a plurality of tumblers 4, a plurality of tumbler springs 5, an outer cylinder 6, an E ring 7 as a ring fastening member, a rotor 8, and an urging member. A coil spring 9, a steel ball 10 as a sphere, a contact piece 11 as a movable contact, a fall-out prevention member 12, a base member 13, and a frame 14 are mainly included.

The key switch device 1 can insert the key 15 into the keyhole 31 and rotate the inner cylinder 3 with respect to the outer cylinder 6 by a predetermined angle in the circumferential direction. Each figure of FIG. 3 shows a state in which the inner cylinder 3 is not rotated without inserting the key 15 into the keyhole 31. This state will be called the "first state". 3A is a top view of the key switch device 1, FIG. 3B is a sectional view taken along line BB of FIG. 3A, FIG. 3C is a side view of the key switch device 1, and FIG. 3D is FIG. 3C. CC cross-sectional view, FIG. 3E is a cross-sectional view taken along the line HH of FIG. 3D, FIG. 3F is a cross-sectional view taken along the line DD of FIG. FIG. 3D is a cross-sectional view taken along the line FF and FIG. 3I is a cross-sectional view taken along the line GG of FIG. 3D.

Each figure of FIG. 4 shows a state in which the key 15 is inserted into the keyhole 31 and the inner cylinder 3 is rotated clockwise by about 90 °. This state will be called the "second state". 4A is a top view of the key switch device 1, FIG. 4B is a sectional view taken along the line JJ of FIG. 4A, FIG. 4C is a side view of the key switch device 1, and FIG. 4D is FIG. 4C. 4P is a cross-sectional view taken along the line NP, FIG. 4E is a cross-sectional view taken along the line NN of FIG. 4D, FIG. 4F is a cross-sectional view taken along the line KK of FIG. FIG. 4D is a cross-sectional view taken along the line RR and FIG. 4I is a cross-sectional view taken along the line MM of FIG. 4D.

FIG. 5A is a perspective view seen from the upper side of the inner cylinder 3, and FIG. 5B is a perspective view seen from the lower side of the inner cylinder 3. As shown in FIGS. 2 and 3, FIG. 4, FIG. 5A, and FIG. 5B, the inner cylinder 3 is a cylindrical member. A keyhole 31 is opened at one end of the inner cylinder 3 so that the key 15 can be inserted in the axial direction of the inner cylinder 3. The inner cylinder 3 has a built-in disc cylinder. That is, a tumbler storage portion 32 is provided on the cylindrical side surface of the inner cylinder 3, and a plurality of (three in this example) tumblers 4 (see FIG. 2) are provided in the tumbler storage portion 32 of the inner cylinder 3. They are arranged side by side in the axial direction. Further, a plurality of (three in this example) tumbler springs 5 (see FIG. 2) for urging each tumbler 4 are also stored in the tumbler storage unit 32. The tumbler 4 is urged by the tumbler spring 5 so that the tip portion protrudes outward, but when the key 15 is inserted into the keyhole 31, the tumbler 4 is retracted into the inner cylinder 3. Since the mechanism of such a disc cylinder is well known, detailed description thereof will be omitted.

At the end of the inner cylinder 3 on the keyhole 31 side, an overhanging portion 33 projects in the outward diameter direction. At the lower part of the overhanging portion 33, the stopper 34 projects toward the outer diameter of the inner cylinder 3. The stopper 34 is provided at a position different from that of the tumbler 4 in the circumferential direction of the inner cylinder 3. That is, as shown in FIGS. 3D and 5B, the position of the tumbler 4 closest to the keyhole 31 and the position of the stopper 34 are formed so as to be substantially the same height position. Two stoppers 34 are provided diagonally of the inner cylinder 3 (see FIGS. 3E and 4E).

A recess 36 having a longitudinal direction in the diameter direction of the cylinder of the inner cylinder 3 is formed on the end surface 35 on the other end side of the inner cylinder 3 from the keyhole 31 side (see FIG. 5B).
Further, a concave groove portion 37 is formed around the inner cylinder 3 on the peripheral surface on the other end side of the inner cylinder 3 from the keyhole 31 side.

FIG. 6A is a top view of the outer cylinder 6, and FIG. 6B is a perspective view of the outer cylinder 6. As shown in FIGS. 3A to 3F and FIGS. 4A to 4F, the outer cylinder 6 is a cylindrical housing in which the inner cylinder 3 is rotatably housed in the circumferential direction thereof. As shown in FIGS. 6A, 6B, 3E, 3F, 4E, and 4F, a rotation restraint groove 61 provided along the axial direction of the outer cylinder 6 is formed inside the outer cylinder 6. There is. Two of the rotation restraint grooves 61 are formed at positions facing each other on the inner circumference of the cylinder. As shown in FIG. 3F, rotation inhibiting groove 61 is engaged with the tumbler 4 in the first state.

As shown in FIGS. 6A, 6B, 3E, 3F, 4E, and 4F, the outer cylinder is moved so that the stopper 34 moves to a portion adjacent to each rotation restraint groove 61 on the inner circumference of the outer cylinder 6. A stopper moving path 62 formed along the inner peripheral direction of No. 6 is provided. As a result, as shown in FIGS. 3E and 4E, when the inner cylinder 3 rotates, the stopper 34 does not come into contact with the inner circumference of the outer cylinder 6 at the positions where the stopper moving path 62 and the rotation restraining groove 61 are formed. Move in the circumferential direction. Two stopper moving paths 62 are also provided so as to face each other on the inner peripheral portion of the outer cylinder 6.

Further, as shown in FIGS. 6A, 6B, 3E, and 4E, a stopper receiving portion 63 for restricting the movement of the stopper 34 in the circumferential direction is formed between the rotation restraining groove 61 and the stopper moving path 62. ing. The stopper receiving portion 63 is a portion that projects inside the inner cylinder 3 so as to restrict the movement of the stopper 34 at a predetermined position when the inner cylinder 3 rotates. The stopper receiving portion 63 is configured so that a step is provided in the height direction with respect to the stopper moving path 62. Two stopper receiving portions 63 are also provided so as to face each other on the inner peripheral portion of the outer cylinder 6.

Further, as shown in FIG. 4F, when shifting from the first state to the second state, the tumbler 4 moves by the inner peripheral surface of the stopper receiving portion 63 (protrusion of the inner cylinder 3 in the outer diameter direction). Is regulated. The rotation angle of the inner cylinder 3 with respect to the outer cylinder 6 is set at the positions of the stopper 34 and the stopper receiving portion 63. In the present embodiment, the inner cylinder 3 is set to rotate by about 90 ° with respect to the outer cylinder 6.
At the end of the outer cylinder 6 in the direction opposite to the keyhole 31 direction, an overhanging portion 64 that is rectangular in top view and projects in the out-of-diameter direction is formed.

FIG. 7 is a perspective view of the E-ring 7. FIG. 12 is an enlarged cross-sectional view of the key switch device 1 on the base member 13 side. The E-ring 7 serving as the ring fastening member shown in FIG. 7 is a plate-shaped member in which a part is cut out. As shown in FIGS. 3B and 5B, the inner cylinder 3 is fitted into a concave groove portion 37 formed on the peripheral surface on the other end side of the inner cylinder 3 from the keyhole 31 side via a notch. As a result, the E-ring 7 is attached so as to project outward from the outer peripheral surface of the inner cylinder 3. The E-ring 7 rotates in synchronization with the inner cylinder 3. Then, the E ring 7 and a part of the outer cylinder 6 are engaged with each other. Specifically, as shown in FIGS. 3B, 3D, 34, and 4D, the E-ring 7 is in contact with the end surface (lower surface) 65 on the other end side of the outer cylinder 6.

FIG. 8A is a perspective view seen from the upper side of the rotor 8, and FIG. 8B is a perspective view seen from the lower side of the rotor 8. As shown in FIGS. 8A and 8B, the rotor 8 is a disk-shaped member, and the upper surface 81 thereof has a convex portion extending from one end to the other so as to cross the diameter of the disk. 82 is formed. The convex portion 82 is formed with an insertion hole 83 penetrating in the diameter direction of the rotor 8.

As shown in FIGS. 2, 3B, 3D, 3H, 4B, 4D, and 4H, a coil spring 9 as an urging member and a pair of steel balls 10 as spheres are formed in the insertion hole 83. Is stored. The pair of steel balls 10 are respectively urged by the coil spring 9 in the out-of-diameter direction of the rotor 8. The steel ball 10 is exposed from each opening of the insertion hole 83.

As shown in FIG. 8B, a convex portion 85 having a rectangular cross section is provided at the central portion of the lower surface 84 of the rotor 8 in the shape of a disk.
As shown in FIGS. 3D and 4B, the rotor 8 is attached to the end surface 35 of the inner cylinder 3 by fitting the convex portion 82 with the concave portion 36 formed on the end surface 35 side of the inner cylinder 3. The convex portion 82 may be provided on the end surface 35 side of the inner cylinder 3, and the concave portion 36 may be provided on the upper surface 81 of the rotor 8. As a result, the rotor 8 rotates in synchronization with the inner cylinder 3.

9A is a top view of the contact piece 11, and FIG. 9B is a perspective view of the contact piece 11. The contact piece 11 is a movable contact formed of a leaf spring-shaped metal, and a mounting hole 111 is provided at the center thereof.
FIG. 10 is a perspective view of the dropout prevention member 12. A mounting hole 121 is provided at the center of the dropout prevention member 12.

As shown in FIGS. 12, 3B, 3D, 3I, 4B, 4D, and 4I, the contact piece 11 is attached to the end surface 35 side of the inner cylinder 3, specifically, the lower surface 84 of the rotor 8. Has been done. More specifically, the mounting hole 111 of the contact piece 11 is inserted into the convex portion 85 of the lower surface 84 of the rotor 8, and further, the mounting hole 121 of the fall-out prevention member 12 is inserted into the convex portion 85 to prevent the fall-out prevention member. 12 prevents the contact piece 11 from falling off. With such a structure, the contact piece 11 becomes a movable contact that rotates in conjunction with the rotation of the inner cylinder 3.

FIG. 11 is a top view of the base member 13. As shown in FIG. 2, the base member 13 is a housing in which a rectangular overhanging portion 138 is formed at the upper end of the cylindrical portion 137 in a top view, and a cylindrical storage recess 131 is formed inside the cylindrical portion 137. It is provided. A fixed contact 133 having a predetermined shape is provided on the bottom surface 132 of the storage recess 131. As shown in FIGS. 2 and 11, fitting protrusions 135 protruding toward the outer cylinder 6 are provided at three corners of the upper surface 134 of the base member 13. A plurality of receiving recesses 136 serving as receiving portions for the steel balls 10 are provided on the inner peripheral surface of the storage recess 131. In this example, four receiving recesses 136 are formed at 90 ° intervals on the circumferential inner peripheral surface of the storage recess 131. As shown in FIGS. 2 and 6B, the fitting convex portion 135 fits with the fitting concave portion (not shown) formed on the end surface 65 of the overhanging portion 64 of the outer cylinder 6, thereby forming the base member 13 and the outer cylinder 6 as well. Are joined to each other. The planar shape of the overhanging portion 138 and the planar shape of the overhanging portion 64 are substantially the same.

As shown in FIGS. 3B, 3D, 3G, 3H, 3I, 4B, 4D, 4G, 4H, 4I, and 12, the joined base member 13 and the outer cylinder 6 (and inside). A contact piece 11 serving as a movable contact, a fixed contact 133, and a rotor 8 are housed in a storage recess 131 between the cylinder 3). Further, the base member 13 and the outer cylinder 6 are engaged and arranged so that the E ring 7 does not come off from the inner cylinder 3 in the outer diameter direction.

As shown in FIG. 1, the frame 14 is covered from the upper side of the inner cylinder 3 and the outer cylinder 6, the overhanging portion 64 is suppressed by the holding portion 142, and a plurality of claw portions 141 provided at the lower end are the overhanging portions of the base member 13. It engages with the lower end portion 138a of the 138, and is assembled and fixed so that the outer cylinder 6 and the base member 13 are not easily disassembled.

Next, the operation and effect of the key switch device 1 will be described.
Each figure of FIG. 3 shows the first state of each part in the key switch device 1. When the correct key 15 is inserted into the keyhole 31 in this first state, the tumbler 4 retracts into the inner cylinder 3, the tumbler 4 and the rotation restraint groove 61 are disengaged, and the outer cylinder 6 is disengaged. The inner cylinder 3 becomes rotatable. By operating the key 15 in this state and rotating it by about 90 ° clockwise, it is possible to shift to the second state shown in each figure of FIG. That is, since there is nothing that hinders the rotation of the inner cylinder 3, the stopper 34 can move the rotation restraining groove 61 and the stopper moving path 62.

In the second state, as shown in FIGS. 3E and 4E, the stopper 34 is locked to the stopper receiving portion 63, so that the inner cylinder 3 cannot be rotated any more. By rotating the inner cylinder 3 with respect to the outer cylinder 6 in this way, the contact piece 11 serving as a movable contact rotates in conjunction with the inner cylinder 3. As a result, the contact state between the contact piece 11 which is a movable contact and the fixed contact 133 changes, so that the key switch device 1 can perform switching. That is, the switch can be switched depending on whether it is in the first state or the second state. As shown in FIG. 4F, during the transition from the first state to the second state and during the second state, both tip portions of the tumbler 4 are in contact with the stopper receiving portion 63, so that the tumbler 4 is inside. It does not pop out in the out-of-diameter direction of the cylinder 3. By inserting the correct key 15 into the keyhole 31 in this way, it is possible to freely switch between the first state and the second state.

According to the key switch device 1 described above, the plurality of tumblers 4 and the stopper 34 are not arranged side by side in a row in the axial direction of the inner cylinder 3. That is, the stopper 34 is formed at a position shifted in the circumferential direction with respect to the tumbler 4, and the positions of the plurality of tumblers 4 are brought closer to the keyhole 31 side. More specifically, the height position of the stopper 34 and the tumbler 4 closest to the keyhole 31 are set to be substantially the same height position. Therefore, the axial length of the inner cylinder 3 can be shortened as compared with the conventional key switch device. Therefore, it is possible to provide the key switch device 1 capable of shortening the length of the key 15 in the insertion direction (axial direction).

Further, since the plate-shaped E-ring 7 (ring fastening member) is used, it is possible to prevent the inner cylinder 3 from coming off with respect to the outer cylinder 6. Further, in the technique of Patent Document 2 described above, the E-ring is urged in the outer diameter direction by a coil spring, but in the present embodiment, the coil spring is unnecessary, so that the length of the key switch device 1 in the axial direction is long. Can be shortened.
Further, the E ring 7 may be engaged with at least a part of the outer cylinder 6, but in the present embodiment, as shown in FIG. 3B, the E ring 7 is configured to be in contact with the end surface of the outer cylinder 6. That is, since the concave groove portion 37 of the inner cylinder 3 and the end surface of the outer cylinder 6 are set at the same height position, the length in the axial direction can be shortened.
Further, the E-ring 7 is disengaged in the out-diameter direction by including the base member 13 for accommodating the contact piece 11 and the fixed contact 133 as movable contacts, and engaging and arranging the base member 13 and the outer cylinder 6 in the outer diameter direction. Can be prevented.

Further, in the rotor 8, the coil spring 9 is arranged in the horizontal direction and the steel ball 10 is urged in the out-of-diameter direction, so that the rotor 8 can be made thinner. Further, since the convex portion 82 of the rotor 8 and the concave portion 36 of the inner cylinder 3 are fitted to each other, the length in the axial direction can be further shortened.
Further, in the prior art, since the resin urging member is provided to cope with the problem, the length in the axial direction becomes long, and the load design such as the thickness of the resin urging member is complicated. However, according to the present embodiment, the axial direction of the coil spring 9 is aligned with the radial direction of the rotor 8, and the coil spring 9 and the steel body 10 are housed in the insertion hole 83, so that the coil spring 9 and the steel body 10 are housed in the insertion hole 83 in the height direction. It is possible to suppress stacking of members, and it is possible to shorten the length in the axial direction. Further, since the resin urging member is not used as in the conventional case, the load of each member can be flexibly set.

Further, when the inner cylinder 3 is rotated by a predetermined angle, the steel ball 10 urged by the coil spring 9 and the receiving recess 136 of the base member 13 engage with each other to give a click feeling to the user. It is provided. That is, when the inner cylinder 3 is rotated to the first state or the second state, the steel ball 10 urged by the coil spring 9 enters the receiving recess 136 of the base member 13, and at that time. By feeling or sound, the user is notified that the inner cylinder 3 has been rotated to the first state or the second state. That is, the steel ball 10 can be inserted into the receiving recess 136 to provide a high-quality operation feeling.

Further, in the present embodiment, since the contact piece 11 is formed of a metal having a relatively flat leaf spring shape as the spring, a coil spring having the axial direction of the key switch device 1 in the longitudinal direction becomes unnecessary, and the length in the axial direction is eliminated. Can be made shorter.
Further, since the dropout prevention member 12 for fastening the contact piece 11 is provided, it is possible to prevent the contact piece 11 from falling off with respect to the rotor 8.

As described above, according to the key switch device 1 of the present embodiment, the length in the axial direction can be shortened by organically connecting the members.

1 Key switch device 3 Inner cylinder 31 Keyhole 34 Stopper 35 Other end 36 Recess 4 Tumbler 6 Outer cylinder 61 Rotation restraint groove 62 Stopper movement path 63 Stopper receiving part 65 End surface on the other end 7 E-ring (ring fastening member)
8 Rotor 82 Convex part 83 Insertion hole 9 Coil spring 10 Steel ball (sphere)
11 Contact piece (movable contact)
12 Falling prevention member 13 Base member 131 Storage recess 133 Fixed contact 136 Receiving recess 15 Key

Claims (8)

A cylindrical inner cylinder with a built-in disc cylinder and
An outer cylinder in which the inner cylinder is rotatably stored in the circumferential direction, and an outer cylinder.
A keyhole that opens at one end of the inner cylinder and allows a key to be inserted in the axial direction of the inner cylinder.
A movable contact provided on the other end side of the inner cylinder and rotating in conjunction with the rotation of the inner cylinder,
A fixed contact whose contact state changes with the movable contact according to the rotation angle of the movable contact is provided, and the first state before inserting the key and the inner cylinder when the key is inserted are attached to the outer cylinder. It is a key switch device that can selectively take the second state after rotation.
The inner cylinder is
Multiple tumblers arranged side by side in the axial direction,
The tumbler is provided with a stopper provided at a position different from that in the circumferential direction and protruding in the outer diameter direction.
Inside the outer cylinder,
A rotation inhibiting groove engaging said tumbler in said first state is provided along the axial direction,
A stopper moving path formed along the circumferential direction so that the stopper moves, and
A stopper receiving portion that regulates the movement of the stopper in the circumferential direction is provided.
A key switch device characterized in that the tumbler is configured to regulate the movement of the tumbler by an inner peripheral surface of the stopper receiving portion when shifting from the first state to the second state. .. On the other end side of the inner cylinder, a plate-shaped ring fastening member attached so as to project outward from the outer peripheral surface of the inner cylinder is provided.
The key switch device according to claim 1, wherein the ring fastening member and a part of the outer cylinder are engaged with each other. The key switch device according to claim 2, wherein the ring fastening member comes into contact with an end surface on the other end side of the outer cylinder. The key switch device according to claim 2 or 3, further comprising a base member that houses the movable contact and the fixed contact and holds the ring fastening member so as not to come off from the inner cylinder. A storage recess formed inside the base member,
A disk-shaped rotor that rotates in synchronization with the inner cylinder and is stored in the storage recess and is provided with the movable contact on the other end side.
An insertion hole penetrating in the radial direction of the rotor,
The coil spring housed in the insertion hole and
A sphere exposed from the opening of the insertion hole and urged in the outer diameter direction by the coil spring.
The key switch device according to claim 4, further comprising a receiving recess formed on the inner peripheral surface of the storage recess and serving as a receiving portion of the sphere. Of the other end side of the inner cylinder and one end side of the rotor, a concave portion is formed on one side and a convex portion is formed on the other side. The key switch device according to claim 5, wherein the cylinder and the rotor rotate in synchronization with each other. The key switch device according to any one of claims 1 to 6, wherein the movable contact is made of a leaf spring-shaped metal. The key switch device according to any one of claims 1 to 7, further comprising a fall-out prevention member for fastening the movable contact.

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